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Nova PR400 Detailed Service Manual

Commercial series portable radio
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PR400
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Commercial Series
Portable Radio
Detailed Service Manual

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Summary of Contents for Nova PR400

  • Page 1 PR400 ™ Commercial Series Portable Radio Detailed Service Manual...
  • Page 3 PR400 Portable Radio Detailed Service Manual VHF 136-162 MHz VHF 146-174 MHz UHF 403-440 MHz UHF 438-470 MHz UHF 465-495 MHz Motorola, Inc. 1301 E. Algonquin Road 6881096C25-B Schaumburg, IL 60196...

  • Page 4: Computer Software Copyrights

    Foreword This manual is intended for use by service technicians familiar with portable two-way radios. It contains service information required for the equipment described and is current as of the printing date. Changes which occur after the printing date may be incorporated by a complete Manual revision or alternatively as additions Product Safety and RF Exposure Compliance Note: Before using this product, read the operating instructions for safe usage contained in the...

  • Page 5: Table Of Contents

    Table of Contents Table of Contents Foreword ..............................ii Computer Software Copyrights ........................ii Document Copyrights ..........................ii Disclaimer..............................ii List of Figures ....................x List of Tables ....................xii Related Publications ...................xiii Chapter 1 Test Equipment, Service Aids, and Service Tools..1-1 Test Equipment..........................1-1 Service Aids...........................
  • Page 6 Table of Contents Module 1: VHF 136-162, 146-174 MHz Chapter 4 136-162 MHz VHF Theory Of Operation ......4-1 Introduction ............................ 4-1 VHF Receiver..........................4-1 4.2.1 Receiver Front-End......................4-1 4.2.2 Receiver Back-End ......................4-2 VHF Transmitter..........................4-3 4.3.1 Transmit Power Amplifier ....................4-3 4.3.2 Antenna Switch .........................
  • Page 7 Table of Contents Chapter 7 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists ........... 7-5 Figure 7-3. VHF (136-162 MHz) Radio Circuit Block Interconnect Diagram (8486769Z02-A) ... 7-5 Figure 7-4. VHF (136-162 MHz) Receiver Front End Schematic Diagram (8486769Z02-A)....7-6 Figure 7-5.
  • Page 8 Table of Contents Figure 7-35. VHF (146-174 MHz) Voltage Controlled Oscillator Schematic Diagram (8486342Z13-C)....................7-45 Figure 7-36. VHF (146-174 MHz) Transmitter and Power Control Schematic Diagram (8486342Z13-C)....................7-46 Figure 7-37. VHF (146-174 MHz) Controller Interconnect Schematic Diagram (8486342Z13-C) ..7-47 Figure 7-38.
  • Page 9 Table of Contents UHF Frequency Generation Circuitry .................... 8-4 8.4.1 Fractional-N Synthesizer ....................8-5 8.4.2 Voltage Controlled Oscillator (VCO) ................. 8-6 Keypad............................8-7 Chapter 9 438-470 MHz UHF Theory Of Operation ......9-1 Introduction ............................ 9-1 UHF Receiver ..........................9-1 9.2.1 Receiver Front End ......................
  • Page 10 viii Table of Contents Chapter 12 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists ..........12-5 Figure 12-3. UHF (403-440 MHz) Radio Circuit Block Diagram (8486635Z03-O)......12-5 Figure 12-4. UHF (403-440 MHz) Receiver Front End Schematic Diagram (8486635Z03-O) ... 12-6 Figure 12-5.
  • Page 11 Table of Contents Figure 12-35. UHF (465-495 MHz) Voltage Controlled Oscillator Schematic Diagram (8486634Z02-O) .................... 12-45 Figure 12-36. UHF (465-495 MHz) Transmitter and Power Control Schematic Diagram (8486634Z02-O) .................... 12-46 Figure 12-37. UHF (465-495 MHz) Controller Interconnect Schematic Diagram (8486634Z02-O)..12-47 Figure 12-38.

  • Page 12: List Of Figures

    Table of Contents List of Figures Figure 1-1. Programming/Test Cable....................1-4 Figure 1-2. Wiring of the Connectors ....................1-4 Figure 2-1. DC Power Distribution Block Diagram................2-1 Figure 4-1. VHF Receiver Block Diagram................... 4-1 Figure 4-2. VHF Transmitter Block Diagram..................4-3 Figure 4-3.
  • Page 13 Table of Contents Figure 7-32. VHF (146-174 MHz) Receiver Front End Schematic Diagram (8486342Z13-C) ... 7-42 Figure 7-33. VHF (146-174 MHz) Receiver Back End Schematic Diagram (8486342Z13-C).... 7-43 Figure 7-34. VHF (146-174 MHz) Synthesizer Schematic Diagram (8486342Z13-C)......7-44 Figure 7-35. VHF (146-174 MHz) Voltage Controlled Oscillator Schematic Diagram (8486342Z13-C) ....................
  • Page 14 Table of Contents Figure 12-6. UHF (403-440 MHz) Synthesizer Schematic Diagram (8486635Z03-O) ....... 12-8 Figure 12-7. UHF (403-440 MHz) Voltage Controlled Oscillator Schematic Diagram (8486635Z03-O) ....................12-9 Figure 12-8. UHF (403-440 MHz) Transmitter and Power Control Schematic Diagram (8486635Z03-O) .................... 12-10 Figure 12-9.

  • Page 15: List Of Tables

    Troubleshooting Table for Transmitter ................11-4 Table 11-4. Troubleshooting Table for Board and IC Signals ............11-6 Related Publications PR400 Basic Service Manual ......................6881096C24 PR400 Non-Display User Guide .....................6881096C27 PR400 Half-Keypad User Guide .....................6881096C26 PR400 Full-Keypad User Guide......................6881096C23 Product Safety and RF Exposure Compliance ................6881095C98 PR400 User Guide CDROM ......................HKLN4219...
  • Page 16 Table of Contents June, 2005 6881096C25-B...

  • Page 17: Chapter 1 Test Equipment, Service Aids, And Service Tools

    Chapter 1 Test Equipment, Service Aids, and Service Tools Test Equipment Table 1-1 lists test equipment required to service the PR400 Radios. Table 1-1. Recommended Test Equipment Motorola Part No. Description Characteristics Application R2600 series System analyzer This item will substitute for...

  • Page 18: Service Aids

    Service Aids Table 1-2 lists service aids recommended for working on the PR400 Radios. While all of these items are available from Motorola, most are standard shop equipment items, and any equivalent item capable of the same performance may be substituted for the item listed.
  • Page 19 Test Equipment, Service Aids, and Service Tools: Service Aids Table 1-3. Recommended Service Tools (Continued) Motorola Part Description Application 0180386A78 Illuminated magnifying glass with lens attachment Illumination and magnification of components 0180302E51 Master lens system 0180386A82 Anti-static grounding kit Used during all radio assembly and disassembly pro- cedures 6684253C72 Straight prober...

  • Page 20: Figure 1-1. Programming/Test Cable

    Test Equipment, Service Aids, and Service Tools: Service Aids Programming/Test Cable 25 POSITION 25 POSITION MALE CONNECTOR FEMALE CONNECTOR 36.0” CABLE 36.0” CABLE Figure 1-1. Programming/Test Cable 25 pin Male D Connector Components molded inside 2.5mm stereo and 3.5mm Orange 3.5mm Tip (Speaker +) Blue...

  • Page 21: Chapter 2 Dc Power Distribution

    Chapter 2 DC Power Distribution DC Regulation and Distribution A block diagram of the DC power distribution throughout the radio is shown in Figure 2-1. Accessories 20 pin Connector Audio Power Keypad/Option Board Amplifier Vdda Vdda Regulator UNSWB+ SWB+ 7.5V Vddd Vddd Battery...

  • Page 22: Table 2-1. Voltage Regulators

    DC Power Distribution: DC Regulation and Distribution When the radio is turned on, SWB+ is present and is applied to: • transistor switch Q494 (pins 1 and 6) which turns on Q493 • RX audio power amplifier U490 • voltage divider R420/R421 and port PE0, a microprocessor A/D input which measures battery voltage and radio on/off status The output of FET switch Q493 is applied to the control pins of regulators U310, U320 and U330, turning them on.

  • Page 23: Chapter 3 Controller Theory Of Operation

    7-39 and 7-40). 3.1.1 Microprocessor Circuitry The microprocessor circuitry includes microprocessor (U401) and associated EEPROM, S-RAM (not used in PR400 models), and Flash ROM memories. The following memory IC's are used: Table 3-1. Radio Memory Requirements Reference No. Description Type...

  • Page 24: Memory Usage

    Controller Theory of Operation: Controller 3.1.1.1 Memory Usage Radio operation is controlled by software that is stored in external Flash ROM memory (U404). Radio parameters and customer specific information is stored in external EEPROM (U402). The operating status of the radio is maintained in RAM located within the microprocessor. When the radio is turned off, the operating status of the radio is written to EEPROM before operating voltage is removed from the microprocessor.

  • Page 25: Interface To Rss Programming

    Controller Theory of Operation: Controller In order for each circuit block to respond only to the data intended for it, each peripheral has its own chip select (or chip enable) line. The device will only respond to data when its enable line is pulled low by one of the microprocessor ports, as follows: •...

  • Page 26: Boot Mode Control

    Controller Theory of Operation: Controller The microprocessor reset line (pin 94) can be controlled directly by the digital 3.3 V regulator (U320 pin 7), the microphone jack (part of accessory connector J471) via Q472 and Q471, and the microprocessor itself. U320 pulls the reset line low if the digital 3.3 V source loses regulation. This prevents possible MOS latch-up or overwriting of registers in the microprocessor because the reset line is higher in voltage than the microprocessor VDD ports (U401 pins 12, 39, 59, 88).

  • Page 27: Audio Power Amplifier

    Controller Theory of Operation: Controller • 2.5 volt dc reference source • Microprocessor clock generation (from the 16.8 MHz reference oscillator input) The parameters of U451 that are programmable are selected by the microprocessor via the CLOCK (U451 pin 21), DATA (U451 pin 22) and chip enable (U451 pin 20) lines. RX audio buffer U510 amplifies the audio level from the DEMOD output of the IFIC before being applied to the audio filter IC input (DISC, U451 pin 2).

  • Page 28: Vox Operation

    Controller Theory of Operation: Controller 3.1.2.5 VOX Operation VOX audio accessories do not have a PTT switch. Instead, the mic cartridge is wired directly from J471-4 to ground. If the radio has been programmed for VOX operation and the VOX accessory is plugged in prior to turning the radio on, the current drawn by the cartridge will turn on Q470 (pins 3- 4-5) and a logic high will be seen at port PJ1 at turn-on.

  • Page 29: Chapter 4 136-162 Mhz Vhf Theory Of Operation

    Chapter 4 136-162 MHz VHF Theory Of Operation Introduction This chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in Chapter 7 of this manual. VHF Receiver The VHF receiver covers the range of 136-162 MHz and provides switchable IF bandwidth for use with 12.5 kHz or 20/25 kHz channel spacing systems.

  • Page 30: Receiver Back-End

    136-162 MHz VHF Theory Of Operation: VHF Receiver constant at 6.2 mA regardless of device and temperature variations, for optimum dynamic range and noise figure. The output of the RF amplifier is applied to the interstage filter, a fixed-tuned 3-pole series-coupled resonator design having a 3 dB bandwidth of 54 MHz and insertion loss of 1.8 dB.

  • Page 31: Vhf Transmitter

    136-162 MHz VHF Theory Of Operation: VHF Transmitter VHF Transmitter The VHF transmitter covers the range of 136-162 MHz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (5 watts) and low power (1 watt), or is factory preset to 2 watts.

  • Page 32: Antenna Matching Network

    136-162 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry 4.3.4 Antenna Matching Network The harmonic filter presents a 50 Ω impedance to antenna jack J140. A matching network, made up of C140-C141 and L140, is used to match the antenna impedance to the harmonic filter. This optimizes the performance of the transmitter and receiver into the impedance presented by the antenna, significantly improving the antenna's efficiency.

  • Page 33: Fractional-N Synthesizer

    136-162 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry Transmit modulation from the ASFICcmp (U451 pin 40) is applied to U201 pin 10 (MOD_IN). An electronic attenuator in the ASFICcmp adjusts overall transmitter deviation by varying the audio level applied to the synthesizer IC.

  • Page 34: Voltage Controlled Oscillator (Vco)

    136-162 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry One of the auxiliary outputs of the synthesizer IC (AUX3, U201 pin 2) provides the TRB signal which determines the operating mode of the VCO, either receive or transmit. DATA (U401 Pin 100) DATA LOCK LOCK (U401 Pin 56)

  • Page 35: Keypad

    136-162 MHz VHF Theory Of Operation: Keypad C267, and varactor D261. High-port audio modulation from the synthesizer IC is applied as VCO_MOD to varactor D262 which modulates the transmit VCO. AUX3 (U201 Pin 2) TRB_IN Pin 20 Pin 19 Pin 7 TX/RX/BS Pin 13 Switching Network...
  • Page 36 136-162 MHz VHF Theory Of Operation: Keypad Notes: June, 2005 6881096C25-B...

  • Page 37: Chapter 5 146-174 Mhz Vhf Theory Of Operation

    Chapter 5 146-174 MHz VHF Theory Of Operation Introduction This chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in Chapter 7 of this manual. VHF Receiver The VHF receiver covers the range of 146-174 MHz and provides switchable IF bandwidth for use with 12.5 kHz or 20/25 kHz channel spacing systems.

  • Page 38: Receiver Back-End

    146-174 MHz VHF Theory Of Operation: VHF Receiver constant at 6.2 mA regardless of device and temperature variations, for optimum dynamic range and noise figure. The output of the RF amplifier is applied to the interstage filter, a fixed-tuned 3-pole series-coupled resonator design having a 3 dB bandwidth of 58 MHz and insertion loss of 1.8 dB.

  • Page 39: Vhf Transmitter

    146-174 MHz VHF Theory Of Operation: VHF Transmitter VHF Transmitter The VHF transmitter covers the range of 146-174 MHz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (5 watts) and low power (1 watt), or is factory preset to 2 watts.

  • Page 40: Antenna Matching Network

    146-174 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry 5.3.4 Antenna Matching Network The harmonic filter presents a 50 Ω impedance to antenna jack J140. A matching network, made up of C140-C141 and L140, is used to match the antenna impedance to the harmonic filter. This optimizes the performance of the transmitter and receiver into the impedance presented by the antenna, significantly improving the antenna's efficiency.

  • Page 41: Fractional-N Synthesizer

    146-174 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry Transmit modulation from the ASFICcmp (U451 pin 40) is applied to U201 pin 10 (MOD_IN). An electronic attenuator in the ASFICcmp adjusts overall transmitter deviation by varying the audio level applied to the synthesizer IC.

  • Page 42: Voltage Controlled Oscillator (Vco)

    146-174 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry One of the auxiliary outputs of the synthesizer IC (AUX3, U201 pin 2) provides the TRB signal which determines the operating mode of the VCO, either receive or transmit. DATA (U401 Pin 100) DATA LOCK LOCK (U401 Pin 56)

  • Page 43: Keypad

    146-174 MHz VHF Theory Of Operation: Keypad C267, and varactor D261. High-port audio modulation from the synthesizer IC is applied as VCO_MOD to varactor D262 which modulates the transmit VCO. AUX3 (U201 Pin 2) TRB_IN Pin 20 Pin 19 Pin 7 TX/RX/BS Pin 13 Switching Network...
  • Page 44 146-174 MHz VHF Theory Of Operation: Keypad Notes: June, 2005 6881096C25-B...

  • Page 45: Chapter 6 Vhf Troubleshooting Tables

    Chapter 6 VHF Troubleshooting Tables Troubleshooting Table for Receiver Table 6-1. Troubleshooting Table for Receiver Symptom Possible Causes Procedure Corrective Action Radio Dead (no 1. Battery dead or defec- Substitute known good battery or Charge or replace battery. turn-on beep, no tive.
  • Page 46 VHF Troubleshooting Tables: Troubleshooting Table for Receiver Table 6-1. Troubleshooting Table for Receiver (Continued) Symptom Possible Causes Procedure Corrective Action No Audio 1. Synthesizer out of lock Verify U201-4 is at 3 V dc. Troubleshoot synthesizer/VCO circuits. 2. Defective IFIC Verify audio is present at U51-8.

  • Page 47: Troubleshooting Table For Synthesizer

    VHF Troubleshooting Tables: Troubleshooting Table for Synthesizer Troubleshooting Table for Synthesizer Table 6-2. Troubleshooting Table for Synthesizer Symptom Possible Causes Procedure Corrective Action Synthesizer Out of 1. VCO fault Verify oscillator is working, check RF Check VCO tank components Lock (RX mode level at U251-10 per schematic.

  • Page 48: Troubleshooting Table For Transmitter

    VHF Troubleshooting Tables: Troubleshooting Table for Transmitter Troubleshooting Table for Transmitter Table 6-3. Troubleshooting Table for Transmitter Symptom Possible Causes Procedure Corrective Action No Transmit (no TX 1. PTT switch defective. Verify U401-71 goes low when PTT Replace PTT switch S441. LED indication) is pressed.
  • Page 49 VHF Troubleshooting Tables: Troubleshooting Table for Transmitter Table 6-3. Troubleshooting Table for Transmitter (Continued) Symptom Possible Causes Procedure Corrective Action Low Power 1. Low TX injection Check that RF level at jct. R100/ Check U251, L291-292, C290- R101 per schematic. 291.
  • Page 50 VHF Troubleshooting Tables: Troubleshooting Table for Transmitter Table 6-3. Troubleshooting Table for Transmitter (Continued) Symptom Possible Causes Procedure Corrective Action No EXT MIC audio 1. Mic bias fault Verify approx 1.8 V dc across EXT Check Q470. R475, R477, MIC cartridge in TX mode. Verify L471.

  • Page 51: Troubleshooting Table For Board And Ic Signals

    VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Troubleshooting Table for Board and IC Signals Table 6-4. Troubleshooting Table for Board and IC Signals IC Designator Pin Function DC Voltage Comments (Condition) RF input 44.85 MHz 1.20 IFIC RF input decoupling 1.20 2nd LO osc output...
  • Page 52 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U110 RF input (TX mode) RF Power Amp Vgg (gate bias) 2.65 (typ) (TX mode) (4.25 V typ at VHF) 6.59 (TX mode)
  • Page 53 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U201 Ref osc XTAL2 Freq Synthesizer Ref osc warp output 3.00 Superfilter cap 4.48 Superfilter base (NU) 3.76...
  • Page 54 6-10 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U251 Prescaler output 2.26 VCO / Buffer TX switch output (NU) 0.06 Vcc_BUFFERS 3.00...
  • Page 55 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 6-11 Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U401 PB1_ADDR9 3.05 Microprocessor PB2_ADDR10 0.16 3.23 PBO_ADDR8 3.05 PB5_ADDR13 0.13 PG1_XA14 0.20 PG4_XA17...
  • Page 56 6-12 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U401 PH1_PW2 3.00 Microprocessor PH0_PW1 3.23 Synth chip select XIRQ 3.00 1.48 RX enable 0.01...
  • Page 57 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 6-13 Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U401 PA3_IC4_OC5_OC1 3.00 Microprocessor PA4_OC4_OC1 Squelch detect input PA5_OC3_OC1 Channel activity input PA6_OC2_OC1 PA7_PA1_OC1 VSSR...
  • Page 58 6-14 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U404 3.17 Flash ROM 0.30 0.22 3.03 3.08 3.06 0.24 3.08 3.05 3.05 0.69...
  • Page 59 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 6-15 Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U451 GCB1 general purpose output ASFIC_CMP GCB0 general purpose output 3.00 BW select (25 kHz mode) Squelch channel activity output To U401-84...
  • Page 60 6-16 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Notes: Table 6-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U480 Unit 1 output 2.48 Dual Opamp Unit 1 (-) input 2.48 Unit 1 (+) input 2.46...

  • Page 61: Chapter 7 Vhf Schematic Diagrams, Overlays, And Parts Lists

    Chapter 7 VHF Schematic Diagrams, Overlays, and Parts Lists Introduction This section provides schematic diagrams, overlays, and parts lists for the radio circuit boards and interface connections. 7.1.1 Notes For All Schematics and Circuit Boards * Component is frequency sensitive. Refer to the Electrical Parts List for value and usage. 1.
  • Page 62 VHF Schematic Diagrams, Overlays, and Parts Lists: Introduction Ref. No. Series Circuit Block 301-400 DC Regulation 401-450 Microprocessor 451-550 Audio 7. Circuit Block Interconnection Legend: Name Description USWB+ Unswitched Battery Voltage (always on) 5 volts (regulated) 5 volts in RX mode only 5 volts in TX mode only RESET Low-line reset signal from U320 to uP...

  • Page 63: Six Layer Circuit Board

    VHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic 7.1.2 Six Layer Circuit Board SIDE 1 LAYER 1 (L1) LAYER 2 (L2) LAYER 3 (L3) INNER LAYERS LAYER 4 (L4) LAYER 5 (L5) LAYER 6 (L6) SIDE 2 Figure 7-1.
  • Page 64 VHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic Notes: June, 2005 6881096C25-B...

  • Page 65: Overlays, And Parts Lists

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists Chapter 7 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists USWB+ USWB+ TX_ENA TX_ENA PWR_SET TX_VHF_R1 PWR_SET DEMOD DEMOD RX_BE RX_FE_VHF_R1 BW_SEL BW_SEL IF_IN IF_OUT RX_IN RX_OUT RSSI RSSI CONTROLLER MOD_OUT...

  • Page 66: Figure 7-4. Vhf (136-162 Mhz) Receiver Front End Schematic Diagram (8486769Z02-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists 5.0V (Rx) 0V (Tx) FE_5R 6.8K 1000pF 3.95V (Rx) UMT1 500mV (RF) 3.95V (Rx) IF_OUT FE_IF_OUT 560nH 3.38V (Rx) 1000pF 100nH 2.0V (Rx) 1000pF 0.1uF 6.8K 150nH 82pF 3.9V (Rx) 700mV (RF) 68nH 10pF...

  • Page 67: Figure 7-5. Vhf (136-162 Mhz) Receiver Back End Schematic Diagram (8486769Z02-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists RX Back End (Overtone) U52-1 FL53 TC7W04F CFWC455E 0.1uF OUT 2 U52-2 100K TC7W04F IF_BAND_SEL 5V for 25kHz BW_SE L 0V for 12.5kHz 0.1uF FL54 CFWC455G 1 IN 47pF U52-3 3.3K SH50 SH52...

  • Page 68: Figure 7-6. Vhf (136-162 Mhz) Synthesizer Schematic Diagram (8486769Z02-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists V_SF FN_V_SF 4.5V C231 C232 C233 1000pF 0.1uF 4.7uF R230 R247 110K 160K LOCK FN_LOCK LOCK: 3V UNLOCK: 0V WARP C204 470pF INDMULT SFOUT ADAPTSW CCOMP LOCK C241 REFSEL IADAPT 1200pF V_STEER IOUT...

  • Page 69: Figure 7-7. Vhf (136-162 Mhz) Voltage Controlled Oscillator Schematic Diagram (8486769Z02-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists V_SF V_SF L270 4.5V VCO_VSF R273 560nH C292 1200pF C270 C274 C285 1200pF R270 VCO_3V 0.1uF 0.1uF C272 0.1uF L282 R284 L292 R272 47nH 68nH 9.1K C273 R271 .01uF 8.2K 1200 mV (RF) R274 L271...

  • Page 70: Figure 7-8. Vhf (136-162 Mhz) Transmitter And Power Control Schematic Diagram (8486769Z02-A)

    7-10 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists 7.5 V USWB+ PA_USWB+ C170 0.1uF 0 V (Rx) 7.4 V (Rx) R171 0.15 V (Tx) Q171 TX_ENA Q170 MMBT3904 PA_TX_ENA 6.8K EMB10 1.8V (Tx) R524 0 V (Rx) C172 7.25 V (Tx) 1500pF...

  • Page 71: Figure 7-9. Vhf (136-162 Mhz) Controller Interconnect Schematic Diagram (8486769Z02-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists 7-11 SW_B+ OPT_MIC OPT_TX_AUD_FLAT_RETURN OPT_TX_AUD_RETURN PWR_SET PWR_SET OPT_TX_AUD_SEND CNTL_PWR_SET OPT_RX_AUD_SEND_DETECTOR DEMOD DEMOD CNTL_DEMOD OPT_RX_AUD_SEND_UNMUTED AUDIO BW_SEL BW_SEL OPT_RX_AUD_RETURN CNTL_BW_SEL MOD_OUT MOD_OUT CNTL_MOD_OUT VS_AUDIO_SEL 16_8_MHZ 16_8_MHZ VS_GAIN_SEL CNTL_16_8_MHZ E500 BK1005HM471 C500 C501 1000pF D3_3V...

  • Page 72: Figure 7-10. Vhf (136-162 Mhz) Microprocessor Circuitry Schematic Diagram (8486769Z02-A)

    7-12 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists D3_3V R410 R416 R417 C418 0.1uF D3_3V D3_3V TP405 D3_3V R411 R406 Q425 R401 220K 300K D3_3V R419 D3_3V D3_3V 4.7K C425 TP402 C419 Q426 D3_3V 1000pF Q410 100K R407 D3_3V R412...

  • Page 73: Figure 7-11. Vhf (136-162 Mhz) Audio Circuitry Schematic Diagram (8486769Z02-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists 7-13 150 mV RMS (25 kHz) (Rx) R523 75 mv RMS (12.5 kHz) (Rx) R516 R522 100K C512 C514 6.8pF 16pF R512 R514 Q520-2 150K 100K IMX1 5V_A R511 100K Q520-1 DEMOD R513...

  • Page 74: Figure 7-12. Vhf (136-162 Mhz) Dc Regulation Schematic Diagram (8486769Z02-A)

    7-14 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists USWB+ U310 TK71750S 7.5 V VOUT CTRL F301 DATA BYPASS C301 J301 C313 C303 C304 C310 C311 C312 390pF D301 .01uF VR301 .01uF .01uF .018uF 33uF 10uF MMBZ5250B D3_3V BATT_CHARGE 5 V (Rx) Q311...

  • Page 75: Figure 7-13. Vhf (136-162 Mhz) Keypad Board Schematic Diagram (8466565A03-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists 7-15 DISPLAY MODULE CONNECTOR LEDBL MAIN BOARD CONNECTOR LEDBL J2-9 J1-9 LEDBL J2-16 16 J1-8 Vddd J2-17 17 J1-7 J2-10 10 J1-6 Vddd Vddd DATA J2-1 J1-5 DATA J2-2 J1-4 LCD_SEL J2-3 150pF...

  • Page 76: Figure 7-14. Vhf (136-162 Mhz) Board Top Side View (8486769Z02-A)

    7-16 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists D301 R406 C488 C465 U425 R480 Q425 R408 C458 R405 C454 D425 Q426 C513 S444 C480 R401 R403 J471 R473 R470 R409 U451 FL54 R496 C470 L265 L255 C257 C473 R481 R472...

  • Page 77: Figure 7-15. Vhf (136-162 Mhz) Board Bottom Side View (8486769Z02-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists 7-17 C140 L120 R206 C206 C220 R416 U151 R411 L132 L130 C417 C222 R121 R434 R502 R433 L140 C135 C131 R432 C221 FL51 R150 R501 C223 C157 C224 R120 R151 SH200 D121 R154...

  • Page 78: Figure 7-16. Vhf (136-162 Mhz) Keypad Board (8466565A03-B)

    7-18 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists Component Side Solder Side Figure 7-16. VHF (136-162 MHz) Keypad Board (8466565A03-B) June, 2005 6881096C25-B...

  • Page 79: Vhf (136-162 Mhz) Radio Parts List (8486769Z02-A)

    VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists 7-19 VHF (136-162 MHz) Radio Parts List (8486769Z02-A) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Circuit Motorola Part No. Part No. Part No. Description Part No. 2113743N42 CAP, 47pF C159 2113743L21 CAP, 1500pF...
  • Page 80 7-20 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C410 2311049A57 CAP, 10uF C477 2113743M24 CAP, 0.1uF D440 4805729G49 dual LED red/green, L140...
  • Page 81 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists 7-21 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. Q520 5180159R01 dual NPN, IMX1 R154 0662057V27 RES, 100K R402 0662057M98 RES, 10K...

  • Page 82: Vhf (136-162 Mhz) Keypad Board Parts List (8466565A03-B)

    7-22 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. S444 1880619Z02 switch, rotary on-off, with 10K U404* 5102480J01 Flash ROM 128Kx8, 4809496B11 QSMG-H799 volume control AT49LV001N_70VI 4809496B11...

  • Page 83: Chapter 7 Vhf 136-162 Mhz Schematic Diagrams, Overlays And Parts Lists (8486769Z04-C)

    VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-23 Chapter 7 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) USWB+ USWB+ TX_ENA TX_ENA PWR_SET TX_VHF_R1 PWR_SET DEMOD DEMOD RX_BE RX_FE_VHF_R1 BW_SEL BW_SEL IF_IN IF_OUT RX_IN RX_OUT RSSI RSSI CONTROLLER...

  • Page 84: Figure 7-18. Vhf (136-162 Mhz) Receiver Front End Schematic Diagram (8486769Z04-C)

    7-24 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 5.0V (Rx) 0V (Tx) FE_5R 6.8K 1000pF 3.95V (Rx) UMT1 500mV (RF) 3.95V (Rx) IF_OUT FE_IF_OUT 560nH 3.38V (Rx) 1000pF 100nH 2.0V (Rx) 1000pF 0.1uF 6.8K 150nH 82pF 3.9V (Rx) 700mV (RF) 68nH 10pF...

  • Page 85: Figure 7-19. Vhf (136-162 Mhz) Receiver Back End Schematic Diagram (8486769Z04-C)

    VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-25 RX Back End (Overtone) U52-1 FL53 TC7W04F CFWC455E 0.1uF OUT 2 U52-2 100K TC7W04F IF_BAND_SEL 5V for 25kHz BW_SE L 0V for 12.5kHz 0.1uF FL54 CFWC455G 1 IN 47pF U52-3 3.3K SH50...

  • Page 86: Figure 7-20. Vhf (136-162 Mhz) Synthesizer Schematic Diagram (8486769Z04-C)

    7-26 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) V_SF FN_V_SF 4.5V C231 C232 C233 1000pF 0.1uF 4.7uF R230 R247 110K 160K LOCK FN_LOCK LOCK: 3V UNLOCK: 0V WARP C204 470pF INDMULT SFOUT ADAPTSW CCOMP LOCK C241 REFSEL IADAPT 1200pF V_STEER...

  • Page 87: Figure 7-21. Vhf (136-162 Mhz) Voltage Controlled Oscillator Schematic Diagram (8486769Z04-C)

    VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-27 V_SF V_SF L270 4.5V VCO_VSF R273 560nH C292 1200pF C270 C274 C285 1200pF R270 VCO_3V 0.1uF 0.1uF C272 0.1uF L282 R284 L292 R272 47nH 68nH 9.1K C273 R271 .01uF 8.2K 1200 mV (RF) R274...

  • Page 88: Figure 7-22. Vhf (136-162 Mhz) Transmitter And Power Control Schematic Diagram (8486769Z04-C)

    7-28 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7.5 V USWB+ PA_USWB+ C170 0.1uF 0 V (Rx) 7.4 V (Rx) R171 0.15 V (Tx) Q171 TX_ENA Q170 MMBT3904 PA_TX_ENA 6.8K EMB10 1.8V (Tx) R524 0 V (Rx) C172 7.25 V (Tx) 1500pF...

  • Page 89: Figure 7-23. Vhf (136-162 Mhz) Controller Interconnect Schematic Diagram (8486769Z04-C)

    VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-29 SW_B+ OPT_MIC OPT_TX_AUD_FLAT_RETURN OPT_TX_AUD_RETURN PWR_SET PWR_SET OPT_TX_AUD_SEND CNTL_PWR_SET OPT_RX_AUD_SEND_DETECTOR DEMOD DEMOD CNTL_DEMOD OPT_RX_AUD_SEND_UNMUTED AUDIO BW_SEL BW_SEL OPT_RX_AUD_RETURN CNTL_BW_SEL MOD_OUT MOD_OUT CNTL_MOD_OUT VS_AUDIO_SEL 16_8_MHZ 16_8_MHZ VS_GAIN_SEL CNTL_16_8_MHZ E500 BK1005HM471 C500 C501 1000pF D3_3V...

  • Page 90: Figure 7-24. Vhf (136-162 Mhz) Microprocessor Circuitry Schematic Diagram (8486769Z04-C)

    7-30 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) D3_3V R410 R416 R417 C418 0.1uF D3_3V D3_3V TP405 D3_3V R411 R406 Q425 R401 220K 300K D3_3V R419 D3_3V D3_3V 4.7K C425 TP402 C419 Q426 D3_3V 1000pF Q410 100K R407 D3_3V R412...

  • Page 91: Figure 7-25. Vhf (136-162 Mhz) Audio Circuitry Schematic Diagram (8486769Z04-C)

    VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-31 150 mV RMS (25 kHz) (Rx) R523 75 mv RMS (12.5 kHz) (Rx) R516 R522 100K C512 C514 6.8pF 16pF R512 R514 Q520-2 150K 100K IMX1 5V_A R511 100K Q520-1 DEMOD R513...

  • Page 92: Figure 7-26. Vhf (136-162 Mhz) Dc Regulation Schematic Diagram (8486769Z04-C)

    7-32 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) USWB+ U310 TK71750S 7.5 V VOUT CTRL F301 DATA BYPASS C301 J301 C313 C303 C304 C310 C311 C312 390pF D301 .01uF VR301 .01uF .01uF .018uF 33uF 10uF MMBZ5250B D3_3V BATT_CHARGE 5 V (Rx) Q311...

  • Page 93: Figure 7-27. Vhf (136-162 Mhz) Keypad Board Schematic Diagram (8466565A03-B)

    VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-33 DISPLAY MODULE KEYPAD MAIN BOARD CONNECTOR CONNECTO R LEDBL J2-9 J1-9 LEDBL LEDBL DATA J2-16 16 J1-8 Vddd J2-1 7 J1-7 LCD_SEL J2-1 0 J1-6 J2-1 J1-5 DATA Vddd Vddd J2-2 J1-4...

  • Page 94: Figure 7-28. Vhf (136-162 Mhz) Board Component Side View (8486769Z04-C)

    7-34 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) D301 R406 R405 R480 C488 C454 C465 C458 U425 Q425 D425 C480 Q426 R408 S444 R401 C513 E500 R403 J471 R473 R470 U451 R409 FL54 R496 L265 L255 C470 C257 C473 R481...

  • Page 95: Figure 7-29. Vhf (136-162 Mhz) Board Solder Side View (8486769Z04-C)

    VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-35 C206 R206 C52 C53 L120 C417 R416 C220 R411 C140 U151 L130 L132 R434 R121 R502 C222 R433 C131 L140 FL51 R432 C135 C221 R150 R501 C223 C224 R120 C157 R151 D121...

  • Page 96: Figure 7-30. Vhf (136-162 Mhz) Keypad Board (8466565A03-B)

    7-36 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) Component Side Solder Side Figure 7-30. VHF (136-162 MHz) Keypad Board (8466565A03-B) June, 2005 6881096C25-B...

  • Page 97: Vhf (136-162 Mhz) Radio Parts List (8486769Z04-C)

    VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-37 VHF (136-162 MHz) Radio Parts List (8486769Z04-C) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Circuit Motorola Part No. Part No. Part No. Description Part No. 2113944A33 CAP, 47pF C159 2113945A10 CAP, 1500pF...
  • Page 98 7-38 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C410 2313960D07 CAP, 10uF C477 2113946K02 CAP, 100000pF D471 4809924D29 Diode High Voltage L263...
  • Page 99 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-39 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. 0613952R13 RES, 33K R220 0613952Q53 RES, 150 R413 0613952R25 RES, 100K R491 0613952R66...

  • Page 100: Vhf (136-162 Mhz) Keypad Board Parts List (8466565A03-B)

    7-40 VHF 136-162 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. 2515121H01 Balun Transformer Not_Placed 4815066H01 Transistor (full) 2515121H01 Balun Transformer 2113944A40 CAP, 100pF (Full) Not_Placed 5115281H01 SA616...

  • Page 101: Chapter 7 Vhf 146-174 Mhz (8486342Z13-C) Schematic Diagrams Overlays, And Parts Lists

    VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-41 Chapter 7 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists USWB+ USWB+ TX_ENA TX_ENA PWR_SET TX_VHF_R2 PWR_SET DEMOD DEMOD RX_BE RX_FE_VHF_R2 BW_SEL BW_SEL IF_IN IF_OUT RX_IN RX_OUT RSSI RSSI CONTROLLER...

  • Page 102: Figure 7-32. Vhf (146-174 Mhz) Receiver Front End Schematic Diagram (8486342Z13-C)

    7-42 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 5.0V (Rx) 0V (Tx) FE_5R 6.8K 1000pF 3.95V (Rx) UMT1 500mV (RF) 3.95V (Rx) IF_OUT FE_IF_OUT 680nH 3.38V (Rx) 1000pF 2.0V (Rx) 100nH 1000pF 0.1uF 6.8K 3.9V (Rx) 150nH 82pF 700mV (RF) 68nH...

  • Page 103: Figure 7-33. Vhf (146-174 Mhz) Receiver Back End Schematic Diagram (8486342Z13-C)

    VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-43 5 V (12.5 KHz) 0 V (12.5 KHz) 0 V (25KHz) 5V (25KHz) U52-1 TC7W04F FL53 CFWC455E 0.1uF OUT 2 0 V (12.5 KHz) 0 V (12.5 KHz) 2.8V (25KHz) 1V (25KHz) U52-3 TC7W04F...

  • Page 104: Figure 7-34. Vhf (146-174 Mhz) Synthesizer Schematic Diagram (8486342Z13-C)

    7-44 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists V_SF FN_V_SF 4.5V C231 C232 C233 1000pF 0.1uF 4.7uF R230 R247 200K 270K LOCK FN_LOCK LOCK: 3V UNLOCK: 0V WARP C204 470pF INDMULT SFOUT ADAPTSW CCOMP LOCK C241 REFSEL IADAPT 1200pF IOUT...

  • Page 105: Diagram (8486342Z13-C)

    VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-45 V_SF V_SF L270 4.5V VCO_VSF R273 560nH C292 1200pF C270 C274 C285 1200pF R270 0.1uF 0.1uF VCO_3V C272 0.1uF L282 R284 L292 47nH R272 68nH 9.1K C273 R271 8.2K .01uF 1200 mV (RF) R274...

  • Page 106: Figure 7-36. Vhf (146-174 Mhz) Transmitter And Power Control Schematic Diagram (8486342Z13-C)

    7-46 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7.5 V 0.15 V (Tx) 7.5 V USWB+ PA_USWB+ C170 0.1uF 0 V (Rx) 7.4 V (Rx) R171 0.15 V (Tx) Q171 TX_ENA Q170 MMBT3904 6.8K PA_TX_ENA EMB10 1.8V (Tx) R524 0 V (Rx) C172...

  • Page 107: Figure 7-37. Vhf (146-174 Mhz) Controller Interconnect Schematic Diagram (8486342Z13-C)

    VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-47 SW_B+ OPT_MIC OPT_TX_AUD_FLAT_RETURN OPT_TX_AUD_RETURN PWR_SET PWR_SET OPT_TX_AUD_SEND CNTL_PWR_SET OPT_RX_AUD_SEND_DETECTOR DEMOD DEMOD CNTL_DEMOD OPT_RX_AUD_SEND_UNMUTED AUDIO BW_SEL BW_SEL OPT_RX_AUD_RETURN CNTL_BW_SEL MOD_OUT MOD_OUT CNTL_MOD_OUT VS_AUDIO_SEL 16_8_MHZ 16_8_MHZ VS_GAIN_SEL CNTL_16_8_MHZ E500 BK1005HM471 C500 C501 1000pF D3_3V...

  • Page 108: Figure 7-38. Vhf (146-174 Mhz) Microprocessor Circuitry Schematic Diagram (8486342Z13-C)

    7-48 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists D3_3V R410 R416 R417 C418 0.1uF TP405 R411 D3_3V R419 4.7K TP402 C419 D3_3V 1000pF Q410 R412 C411 C413 C410 C412 100K 10uF 0.1uF 0.1uF TP401 1000pF LSIO HOLD CH_ACT U402 X25128-2.7...

  • Page 109: Figure 7-39. Vhf (146-174 Mhz) Audio Circuitry Schematic Diagram (8486342Z13-C)

    VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-49 150 mV RMS (25 kHz) (Rx) R523 75 mv RMS (12.5 kHz) (Rx) R516 R522 100K C512 C514 6.8pF 16pF R512 R514 Q520-2 150K 100K IMX1 5V_A R511 100K Q520-1 DEMOD R513...

  • Page 110: Figure 7-40. Vhf (146-174 Mhz) Dc Regulation Schematic Diagram (8486342Z13-C)

    7-50 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists USWB+ U310 TK71750S 7.5 V VOUT CTRL F301 DATA BYPASS C301 J301 C313 C303 C304 C310 C311 C312 390pF D301 .01uF VR301 .01uF .01uF .018uF 33uF 10uF MMBZ5250B D3_3V BATT_CHARGE 5 V (Rx) Q311...

  • Page 111: Figure 7-41. Vhf (146-174 Mhz) Keypad Board Schematic Diagram (8466565A03-B)

    VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-51 DISPLAY MODULE CONNECTOR LEDBL MAIN BOARD CONNECTOR LEDBL J2-9 J1-9 LEDBL J2-16 16 J1-8 Vddd J2-17 17 J1-7 J2-10 10 J1-6 Vddd Vddd DATA J2-1 J1-5 DATA J2-2 J1-4 LCD_SEL J2-3 150pF...

  • Page 112: Figure 7-42. Vhf (146-174 Mhz) Board, Top Side (8486342Z13-C)

    7-52 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists D301 C465 R480 C458 C488 C454 C513 S444 C480 J471 R470 R473 U451 FL54 R496 C470 L265 L255 C267 D262 C257 R481 R472 C473 C489 C482 C302 R522 R471 C455 F301 U480...

  • Page 113: Figure 7-43. Vhf (146-174 Mhz) Board, Bottom Side (8486342Z13-C)

    VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-53 C206 R206 C52 C53 C140 L120 C220 C417 R416 R411 U151 L130 L132 C222 R121 R434 R502 R433 L140 R432 C131 C135 C221 FL51 R150 R501 C223 C224 R120 C157 R151 SH200...

  • Page 114: Figure 7-44. Vhf (146-174 Mhz) Keypad Board (8466565A03-B)

    7-54 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists Component Side Solder Side Figure 7-44. VHF (146-174 MHz) Keypad Board (8466565A03-B) June, 2005 6881096C25-B...

  • Page 115: Vhf (146-174 Mhz) Radio Parts List (8486342Z13-C)

    VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-55 VHF (146-174 MHz) Radio Parts List (8486342Z13-C) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Circuit Motorola Part No. Part No. Part No. Description Part No. 2113743N42 CAP, 47pF C159 2113743L21 CAP, 1500pF...
  • Page 116 7-56 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C411 2113743M24 CAP, 0.1uF C480 2113743E20 CAP, 0.1uF E453 2480640Z01 BK1005HM471 L265...
  • Page 117 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists 7-57 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. 0662057N23 RES, 100K R243 0662057M81 RES, 2K R431 Not_Placed RES, 100K R506 0662057M50...

  • Page 118: Vhf (146-174 Mhz) Keypad Board Parts List (8466565A03-B)

    7-58 VHF 146-174 MHz (8486342Z13-C) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Description Description Part No. Part No. 5109522E10 TC7W04F 2113743N50 CAP, 100pF U110 0186438Z01 RA07M1317M_VHF 2113743N50 CAP, 100pF U150 5113818A01 LM2904 2113743N50 CAP, 100pF U151 2484657R01 57R01 2113743N50 CAP, 100pF...

  • Page 119: Chapter 7 Vhf 146-174 Mhz Schematic Diagrams, Overlays And Parts Lists (8486769Z04-C)

    VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-59 Chapter 7 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) USWB+ USWB+ TX_ENA TX_ENA PWR_SET TX_VHF_R2 PWR_SET DEMOD DEMOD RX_BE RX_FE_VHF_R2 BW_SEL BW_SEL IF_IN IF_OUT RX_IN RX_OUT RSSI RSSI CONTROLLER...

  • Page 120: Figure 7-46. Vhf (146-174 Mhz) Receiver Front End Schematic Diagram (8486769Z04-C)

    7-60 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 5.0V (Rx) 0V (Tx) FE_5R 6.8K 1000pF 3.95V (Rx) UMT1 500mV (RF) 3.95V (Rx) IF_OUT FE_IF_OUT 680nH 3.38V (Rx) 1000pF 100nH 2.0V (Rx) 1000pF 0.1uF 6.8K 150nH 82pF 3.9V (Rx) 700mV (RF) 68nH 10pF...

  • Page 121: Figure 7-47. Vhf (146-174 Mhz) Receiver Back End Schematic Diagram (8486769Z04-C)

    VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-61 5 V (12.5 KHz) 0 V (12.5 KHz) 0 V (25KHz) 5V (25KHz) U52-1 TC7W04F FL53 CFWC455E 0.1uF OUT 2 0 V (12.5 KHz) 0 V (12.5 KHz) 2.8V (25KHz) 1V (25KHz) U52-3 TC7W04F...

  • Page 122: Figure 7-48. Vhf (146-174 Mhz) Synthesizer Schematic Diagram (8486769Z04-C)

    7-62 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) V_SF FN_V_SF 4.5V C231 C232 C233 1000pF 0.1uF 4.7uF R230 R247 200K 270K LOCK FN_LOCK LOCK: 3V UNLOCK: 0V WARP C204 INDMULT 470pF SFOUT ADAPTSW CCOMP LOCK C241 REFSEL IADAPT 1200pF IOUT...

  • Page 123: Figure 7-49. Vhf (146-174 Mhz) Voltage Controlled Oscillator Schematic Diagram 8486769Z04-C)

    VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-63 V_SF V_SF L270 4.5V VCO_VSF R273 560nH C292 1200pF C270 C274 C285 1200pF R270 VCO_3V 0.1uF 0.1uF C272 0.1uF L282 R284 L292 R272 47nH 68nH 9.1K C273 R271 8.2K .01uF 1200 mV (RF) R274...

  • Page 124: Figure 7-50. Vhf (146-174 Mhz) Transmitter And Power Control Schematic Diagram (8486769Z04-C)

    7-64 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7.5 V 0.15 V (Tx) 7.5 V USWB+ PA_USWB+ C170 0.1uF 0 V (Rx) 7.4 V (Rx) R171 0.15 V (Tx) Q171 TX_ENA Q170 MMBT3904 PA_TX_ENA 6.8K EMB10 1.8V (Tx) R524 0 V (Rx) C172...

  • Page 125: Figure 7-51. Vhf (146-174 Mhz) Controller Interconnect Schematic Diagram (8486769Z04-C)

    VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-65 SW_B+ OPT_MIC OPT_TX_AUD_FLAT_RETURN OPT_TX_AUD_RETURN PWR_SET PWR_SET OPT_TX_AUD_SEND CNTL_PWR_SET OPT_RX_AUD_SEND_DETECTOR DEMOD DEMOD CNTL_DEMOD OPT_RX_AUD_SEND_UNMUTED AUDIO BW_SEL BW_SEL OPT_RX_AUD_RETURN CNTL_BW_SEL MOD_OUT MOD_OUT CNTL_MOD_OUT VS_AUDIO_SEL 16_8_MHZ 16_8_MHZ VS_GAIN_SEL CNTL_16_8_MHZ E500 BK1005HM471 C500 C501 1000pF D3_3V...

  • Page 126: Figure 7-52. Vhf (146-174 Mhz) Microprocessor Circuitry Schematic Diagram (8486769Z04-C)

    7-66 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) D3_3V R410 R416 R417 C418 0.1uF TP405 R411 D3_3V R419 4.7K TP402 C419 D3_3V 1000pF Q410 R412 C411 C413 C410 C412 100K 0.1uF 0.1uF 10uF TP401 1000pF LSIO HOLD CH_ACT U402 X25128-2.7...

  • Page 127: Figure 7-53. Vhf (146-174 Mhz) Audio Circuitry Schematic Diagram (8486769Z04-C)

    VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-67 150 mV RMS (25 kHz) (Rx) R523 75 mv RMS (12.5 kHz) (Rx) R516 R522 100K C512 C514 6.8pF 16pF R512 R514 Q520-2 150K 100K IMX1 5V_A R511 100K Q520-1 DEMOD R513...

  • Page 128: Figure 7-54. Vhf (146-174 Mhz) Dc Regulation Schematic Diagram (8486769Z04-C)

    7-68 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) USWB+ U310 TK71750S 7.5 V VOUT CTRL F301 DATA BYPASS C301 J301 C313 C304 C311 C303 C310 C312 390pF D301 .01uF VR301 .01uF .01uF .018uF 33uF 10uF MMBZ5250B D3_3V BATT_CHARGE 5 V (Rx) Q311...

  • Page 129: Figure 7-55. Vhf (146-174 Mhz) Keypad Board Schematic Diagram (8466565A03-B)

    VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-69 DISPLAY MODULE CONNECTOR LEDBL MAIN BOARD CONNECTOR LEDBL J2-9 J1-9 LEDBL J2-16 16 J1-8 Vddd J2-17 17 J1-7 J2-10 10 J1-6 Vddd Vddd DATA J2-1 J1-5 DATA J2-2 J1-4 LCD_SEL J2-3 150pF...

  • Page 130: Figure 7-56. Vhf (146-174 Mhz) Board Component Side View (8486769Z04-C)

    7-70 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) D301 R406 R405 R480 C488 C454 C465 C458 U425 Q425 D425 C480 Q426 R408 S444 R401 C513 E500 R403 J471 R473 R470 U451 R409 FL54 R496 L265 L255 C470 C257 C473 R481...

  • Page 131: Figure 7-57. Vhf (146-174 Mhz) Board Solder Side View (8486769Z04-C)

    VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-71 C206 R206 C52 C53 L120 C417 R416 C220 C140 R411 U151 L130 L132 R434 R121 R502 C222 R433 C131 L140 FL51 R432 C135 R150 C221 R501 C223 C224 R120 C157 R151 D121...

  • Page 132: Figure 7-58. Vhf (146-174 Mhz) Keypad Board (8466565A03-B)

    7-72 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) Component Side Solder Side Figure 7-58. VHF (146-174 MHz) Keypad Board (8466565A03-B) June, 2005 6881096C25-B...

  • Page 133: Vhf (146-174 Mhz) Radio Parts List (8486769Z04-C)

    VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-73 VHF (146-174 MHz) Radio Parts List (8486769Z04-C) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Circuit Motorola Part No. Part No. Part No. Description Part No. 2113944A33 CAP, 47pF C159 2113945A10 CAP, 1500pF...
  • Page 134 7-74 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C410 2313960D07 CAP, 10uF C477 2113946K02 CAP, 100000pF D471 4809924D29 Diode High Voltage L263...
  • Page 135 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) 7-75 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. 0613952R13 RES, 33K R220 0613952Q53 RES, 150 R413 0613952R25 RES, 100K R491 0613952R66...

  • Page 136: Vhf (146-174 Mhz) Keypad Board Parts List (8466565A03-B)

    7-76 VHF 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists (8486769Z04-C) VHF (146-174 MHz) Keypad Board Parts List Circuit Motorola Circuit Motorola Description (8466565A03-B) Description Part No. Part No. Circuit Motorola 2515121H01 Balun Transformer 4815066H01 Transistor (Full) Description Part No. 2515121H01 Balun Transformer Not_Placed...

  • Page 137: Chapter 8 403-440 Mhz Uhf Theory Of Operation

    Chapter 8 403-440 MHz UHF Theory Of Operation Introduction This chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in Chapter 12 of this manual. UHF Receiver The UHF receiver covers the range of 403-440 MHz and provides switchable IF bandwidth for use with 20/25/30 kHz or 12.5 kHz channel spacing systems.

  • Page 138: Receiver Back End

    403-440 MHz UHF Theory Of Operation: UHF Receiver The output of the RF amplifier is applied to the interstage filter, a fixed-tuned 4-pole Butterworth shunt-coupled resonator design having a 3 dB bandwidth of 68 MHz centered at 462 MHz, and insertion loss of 3.5 dB.

  • Page 139: Uhf Transmitter

    403-440 MHz UHF Theory Of Operation: UHF Transmitter UHF Transmitter The UHF transmitter covers the range of 403-440 MHz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (4 watts) and low power (1 watt), or is factory preset to 2 watts.

  • Page 140: Antenna Matching Network

    403-440 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry 8.3.4 Antenna Matching Network The harmonic filter presents a 50Ω impedance to antenna jack J140. A matching network, made up of C140-C141 and L140, is used to match the antenna impedance to the harmonic filter. This optimizes the performance of the transmitter and receiver into the impedance presented by the antenna, significantly improving the antenna's efficiency.

  • Page 141: Fractional-N Synthesizer

    403-440 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry SPI_CLK, and SYNTH_CS (chip select) lines (U409 pins 100, 1 and 47 respectively). A logic high (3 V) from U201 pin 4 indicates to the microprocessor that the synthesizer is locked. Buffer Voltage Q280...

  • Page 142: Voltage Controlled Oscillator (Vco)

    403-440 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry One of the auxiliary outputs of the synthesizer IC (AUX3, U201 pin 2) provides the TRB signal which determines the operating mode of the VCO, either receive or transmit. DATA (U401 Pin 100) DATA LOCK LOCK (U401 Pin 56)

  • Page 143: Keypad

    403-440 MHz UHF Theory Of Operation: Keypad C267, and varactor D261. High-port audio modulation from the synthesizer IC is applied as VCO_MOD to varactor D262 which modulates the transmit VCO. AUX3 (U201 Pin 2) TRB_IN Pin 20 Pin 19 Pin 7 TX/RX/BS Pin 13 Switching Network...
  • Page 144 403-440 MHz UHF Theory Of Operation: Keypad Notes: June, 2005 6881096C25-B...

  • Page 145: Chapter 9 438-470 Mhz Uhf Theory Of Operation

    Chapter 9 438-470 MHz UHF Theory Of Operation Introduction This chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in Chapter 12 of this manual. UHF Receiver The UHF receiver covers the range of 438-470 MHz and provides switchable IF bandwidth for use with 20/25/30 kHz or 12.5 kHz channel spacing systems.

  • Page 146: Receiver Back End

    438-470 MHz UHF Theory Of Operation: UHF Receiver The output of the RF amplifier is applied to the interstage filter, a fixed-tuned 4-pole Butterworth shunt-coupled resonator design having a 3 dB bandwidth of 68 MHz centered at 462 MHz, and insertion loss of 3 dB.

  • Page 147: Uhf Transmitter

    438-470 MHz UHF Theory Of Operation: UHF Transmitter UHF Transmitter The UHF transmitter covers the range of 438-470 MHz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (4 watts) and low power (1 watt), or is factory preset to 2 watts.

  • Page 148: Antenna Matching Network

    438-470 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry 9.3.4 Antenna Matching Network The harmonic filter presents a 50Ω impedance to antenna jack J140. A matching network, made up of C140-C141 and L140, is used to match the antenna impedance to the harmonic filter. This optimizes the performance of the transmitter and receiver into the impedance presented by the antenna, significantly improving the antenna's efficiency.

  • Page 149: Fractional-N Synthesizer

    438-470 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry SPI_CLK, and SYNTH_CS (chip select) lines (U409 pins 100, 1 and 47 respectively). A logic high (3 V) from U201 pin 4 indicates to the microprocessor that the synthesizer is locked. Buffer Voltage Q280...

  • Page 150: Voltage Controlled Oscillator (Vco)

    438-470 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry One of the auxiliary outputs of the synthesizer IC (AUX3, U201 pin 2) provides the TRB signal which determines the operating mode of the VCO, either receive or transmit. DATA (U401 Pin 100) DATA LOCK LOCK (U401 Pin 56)

  • Page 151: Keypad

    438-470 MHz UHF Theory Of Operation: Keypad C267, and varactor D261. High-port audio modulation from the synthesizer IC is applied as VCO_MOD to varactor D262 which modulates the transmit VCO. AUX3 (U201 Pin 2) TRB_IN Pin 20 Pin 19 Pin 7 TX/RX/BS Pin 13 Switching Network...
  • Page 152 438-470 MHz UHF Theory Of Operation: Keypad Notes: June, 2005 6881096C25-B...

  • Page 153: Chapter 10 465-495 Mhz Uhf Theory Of Operation

    Chapter 10 465-495 MHz UHF Theory Of Operation 10.1 Introduction This chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in Chapter 12 of this manual. 10.2 UHF Receiver The UHF receiver covers the range of 465-495 MHz and provides switchable IF bandwidth for use with 20/25/30 kHz or 12.5 kHz channel spacing systems.

  • Page 154: Receiver Back End

    10-2 465-495 MHz UHF Theory Of Operation: UHF Receiver The output of the RF amplifier is applied to the interstage filter, a fixed-tuned 4-pole Butterworth shunt-coupled resonator design having a 3 dB bandwidth of 68 MHz centered at 480 MHz, and insertion loss of 3.3 dB.

  • Page 155: Uhf Transmitter

    465-495 MHz UHF Theory Of Operation: UHF Transmitter 10-3 10.3 UHF Transmitter The UHF transmitter covers the range of 465-495 MHz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (4 watts) and low power (1 watt), or is factory preset to 2 watts.

  • Page 156: Antenna Matching Network

    10-4 465-495 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry 10.3.4 Antenna Matching Network The harmonic filter presents a 50Ω impedance to antenna jack J140. A matching network, made up of C140-C141 and L140, is used to match the antenna impedance to the harmonic filter. This optimizes the performance of the transmitter and receiver into the impedance presented by the antenna, significantly improving the antenna's efficiency.

  • Page 157: Fractional-N Synthesizer

    465-495 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry 10-5 SPI_CLK, and SYNTH_CS (chip select) lines (U409 pins 100, 1 and 47 respectively). A logic high (3 V) from U201 pin 4 indicates to the microprocessor that the synthesizer is locked. Buffer Voltage Q280...

  • Page 158: Voltage Controlled Oscillator (Vco)

    10-6 465-495 MHz UHF Theory Of Operation: UHF Frequency Generation Circuitry One of the auxiliary outputs of the synthesizer IC (AUX3, U201 pin 2) provides the TRB signal which determines the operating mode of the VCO, either receive or transmit. DATA (U401 Pin 100) DATA LOCK...

  • Page 159: Keypad

    465-495 MHz UHF Theory Of Operation: Keypad 10-7 C267, and varactor D261. High-port audio modulation from the synthesizer IC is applied as VCO_MOD to varactor D262 which modulates the transmit VCO. AUX3 (U201 Pin 2) TRB_IN Pin 20 Pin 19 Pin 7 TX/RX/BS Pin 13...
  • Page 160 10-8 465-495 MHz UHF Theory Of Operation: Keypad Notes: June, 2005 6881096C25-B...

  • Page 161: Chapter 11 Uhf Troubleshooting Tables

    Chapter 11 UHF Troubleshooting Tables 11.1 Troubleshooting Table for Receiver Table 11-1. Troubleshooting Table for Receiver Symptom Possible Causes Procedure Corrective Action Radio Dead (no 1. Battery dead or defec- Substitute known good battery or Charge or replace battery. turn-on beep, no tive.
  • Page 162 11-2 UHF Troubleshooting Tables: Troubleshooting Table for Receiver Table 11-1. Troubleshooting Table for Receiver (Continued) Symptom Possible Causes Procedure Corrective Action No Audio 1. Synthesizer out of lock Verify U201-4 is at 3V dc. Troubleshoot synthesizer/VCO circuits. 2. Defective IFIC Verify audio is present at U51-8.

  • Page 163: Troubleshooting Table For Synthesizer

    UHF Troubleshooting Tables: Troubleshooting Table for Synthesizer 11-3 11.2 Troubleshooting Table for Synthesizer Table 11-2. Troubleshooting Table for Synthesizer Symptom Possible Causes Procedure Corrective Action Synthesizer Out of 1. VCO fault Verify oscillator is working, check RF Check VCO tank components Lock (RX mode level at U251-10 per schematic.

  • Page 164: Troubleshooting Table For Transmitter

    11-4 UHF Troubleshooting Tables: Troubleshooting Table for Transmitter 11.3 Troubleshooting Table for Transmitter Table 11-3. Troubleshooting Table for Transmitter Symptom Possible Causes Procedure Corrective Action No Transmit (no TX 1. PTT switch defective. Verify U401-71 goes low when PTT Replace PTT switch S441. LED indication) is pressed.
  • Page 165 UHF Troubleshooting Tables: Troubleshooting Table for Transmitter 11-5 Table 11-3. Troubleshooting Table for Transmitter (Continued) Symptom Possible Causes Procedure Corrective Action Poor TX range, 1. RF test jack defective Verify continuity of J140 pins 3 and 4 Replace J140. conducted power in RX mode only.

  • Page 166: Troubleshooting Table For Board And Ic Signals

    11-6 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11.4 Troubleshooting Table for Board and IC Signals Table 11-4. Troubleshooting Table for Board and IC Signals IC Designator Pin Function DC Voltage Comments (Condition) RF input 44.85 MHz 1.20 IFIC RF input decoupling...
  • Page 167 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-7 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U110 RF input (TX mode) RF Power Amp Vgg (gate bias) 2.65 (typ) (TX mode) (4.25V typ at VHF) 6.59...
  • Page 168 11-8 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U201 Ref osc XTAL2 Freq Synthesizer Ref osc warp output 3.00 Superfilter cap 4.48 Superfilter base (NU)
  • Page 169 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-9 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U251 Prescaler output 2.26 VCO / Buffer TX switch output (NU) 0.06 Vcc_BUFFERS 3.00...
  • Page 170 11-10 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U401 PB1_ADDR9 3.05 Microprocessor PB2_ADDR10 0.16 3.23 PBO_ADDR8 3.05 PB5_ADDR13 0.13 PG1_XA14 0.20 PG4_XA17...
  • Page 171 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-11 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U401 PH1_PW2 3.00 Microprocessor PH0_PW1 3.23 Synth chip select XIRQ 3.00 1.48 RX enable 0.01...
  • Page 172 11-12 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U401 PA3_IC4_OC5_OC1 3.00 Microprocessor PA4_OC4_OC1 Squelch detect input PA5_OC3_OC1 Channel activity input PA6_OC2_OC1 PA7_PA1_OC1 VSSR...
  • Page 173 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-13 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U404 3.17 Flash ROM 0.30 0.22 3.03 3.08 3.06 0.24 3.08 3.05 3.05 0.69...
  • Page 174 11-14 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U451 GCB1 general purpose output ASFIC_CMP GCB0 general purpose output 3.00 BW select (25 kHz mode) Squelch channel activity output To U401-84...
  • Page 175 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-15 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Function DC Voltage Comments (Condition) U480 Unit 1 output 2.48 Dual Opamp Unit 1 (-) input 2.48 Unit 1 (+) input 2.46...
  • Page 176 11-16 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Notes: June, 2005 6881096C25-B...
  • Page 177 Chapter 12 UHF Schematic Diagrams, Overlays, and Parts Lists 12.1 Introduction This section provides schematic diagrams, overlays, and parts lists for the radio circuit boards and interface connections. 12.1.1 Notes For All Schematics and Circuit Boards * Component is frequency sensitive. Refer to the Electrical Parts List for value and usage. 1.
  • Page 178 12-2 UHF Schematic Diagrams, Overlays, and Parts Lists: Introduction Ref. No. Series Circuit Block 301-400 DC Regulation 401-450 Microprocessor 451-550 Audio 7. Circuit Block Interconnection Legend: Name Description USWB+ Unswitched Battery Voltage (always on) 5 volts (regulated) 5 volts in RX mode only 5 volts in TX mode only RESET Low-line reset signal from U320 to uP...

  • Page 179: Six Layer Circuit Board

    UHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic 12-3 12.1.2 Six Layer Circuit Board SIDE 1 LAYER 1 (L1) LAYER 2 (L2) LAYER 3 (L3) INNER LAYERS LAYER 4 (L4) LAYER 5 (L5) LAYER 6 (L6) SIDE 2 Figure 12-1.
  • Page 180 12-4 UHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic Notes: June, 2005 6881096C25-B...

  • Page 181: Overlays, And Parts Lists

    UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-5 Chapter 12 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists UHF R1 USWB + USWB+ USWB+ USWB TX_EN A TX_ENA PWR_SET TX_UHF_R1 PWR_SET RX_BE RX_FE_UHF_R1 DEMOD DEMOD CONTROLLER BW_SEL BW_SEL...

  • Page 182: Figure 12-4. Uhf (403-440 Mhz) Receiver Front End Schematic Diagram (8486635Z03-O)

    12-6 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists FE_5R 5.6K 390pF UMT1 UHF R1 Front End SH40 SHIELD SHIELD 390pF 390pF 18nH 0.1uF 5.6K C523 0.55pF C521 4.2V 5.5% FE_IF_OUT 1.2K 390pF 3.3pF C522 IF_OUT 3.0% 680nH 1.8pF 1.8pF 18pF...

  • Page 183: Figure 12-5. Uhf (403-440 Mhz) Receiver Back End Schematic Diagram (8486635Z03-O)

    UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-7 RX Back End (Overtone) U52-1 FL53 TC7W04F CFWC455E 0.1uF OUT 2 U52-2 100K TC7W04F IF_BAND_SEL 5V for 25kHz BW_SE L 0V for 12.5kHz FL54 0.1uF CFWC455G 1 IN U52-3 47pF 3.3K SH50...

  • Page 184: Figure 12-6. Uhf (403-440 Mhz) Synthesizer Schematic Diagram (8486635Z03-O)

    12-8 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists UHF R1 Synthesizer FN_V_SF 4.5V V_SF SH200 SH201 C231 C232 C233 SHIELD SHIELD R230 R247 LOCK: 3V 0.1uF 1000pF 4.7uF UNLOCK: 0V FN_LOCK LOCK C204 31 NC3 WARP 470pF 29 NC2 INDMULT 17 NC1...

  • Page 185: Figure 12-7. Uhf (403-440 Mhz) Voltage Controlled Oscillator Schematic Diagram (8486635Z03-O)

    UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-9 UHF R1 VCO V_SF VCO_VSF L270 R273 R277 4.5V V_SF 220nH C285 C270 C274 C292 VCO_3V 390pF 0.1uF 390pF 0.1uF L272 220nH SH250 SH251 SH253 C272 SHIELD SHIELD SHIELD L292 0.1uF L282...

  • Page 186: Figure 12-8. Uhf (403-440 Mhz) Transmitter And Power Control Schematic Diagram (8486635Z03-O)

    12-10 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists UHF R1 Tx PA_USWB+ USWB+ Q171 PA_TX_ENA TX_ENA C170 390pF Q170 EMB10 C525 390pF C172 R120 C157 C154 390pF 0.1uF 390pF R152 R121 100K R158 R159 C151 R153 U151 100K 390pF 5.1K...

  • Page 187: Figure 12-9. Uhf (403-440 Mhz) Controller Interconnect Schematic Diagram (8486635Z03-O)

    UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-11 Controller SW_B +3 V VS_AUDIO_SEL CNTL_PWR_SET OPT_MI C PWR_SET PWR_SET OPT_TX_AUD_FLAT_RETURN CNTL_DEMO D DEMO D DEMOD OPT_TX_AUD_RETURN CNTL_BW_SEL OPT_TX_AUD_SEN D BW_SEL BW_SEL AUDI O OPT_RX_AUD_SEND_DETECTO R OPT_RX_AUD_SEND_UNMUTED MOD_OUT MOD_OUT CNTL_16_8_MHZ OPT_RX_AUD_RETURN 16_8_MHZ...

  • Page 188: Figure 12-10. Uhf (403-440 Mhz) Microprocessor Circuitry Schematic Diagram (8486635Z03-O)

    12-12 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists Microprocessor D3_3 V D3_3V C418 R410 R416 R417 D3_3V 0.1uF Q410 C410 C411 C413 C412 TP402 R412 R411 0.1uF 1000pF 0.1uF 10uF 100K SC I TP405 SH401 SH400 C419 SHIELD SHIELD 1000pF...

  • Page 189: Figure 12-11. Uhf (403-440Mhz) Audio Circuitry Schematic Diagram (8486635Z03-O)

    UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-13 R516 R523 Audio C512 C514 R522 Q520 6.8pF 16pF IMX1 100K R512 150K R514 5V_A 100K U510-1 LM2904 Q520 IMX1 R511 C518 R513 DEMOD C460 100K R515 VR471 0.1uF OPT_RX_AUD_SEND_DETECTO R R470 5V_A...

  • Page 190: Figure 12-12. Uhf (403-440 Mhz) Dc Regulation Schematic Diagram (8486635Z03-O)

    12-14 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists DC Regulation USWB+ U310 TK71750S VR301 F301 J301 MMBZ5250B 1 VIN VOUT 4 CTRL D301 C301 C303 C304 BYPASS C311 C312 C313 DATA 390pF .01uF .018uF .01uF 33uF 10uF Q311 C310 .01uF...

  • Page 191: Figure 12-13. Uhf (403-440 Mhz) Keypad Board Schematic Diagram (8466565A03-B)

    UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-15 DISPLAY MODULE CONNECTOR LEDBL MAIN BOARD CONNECTOR LEDBL J2-9 J1-9 LEDBL J2-16 16 J1-8 Vddd J2-17 17 J1-7 J2-10 10 J1-6 Vddd Vddd DATA J2-1 J1-5 DATA J2-2 J1-4 LCD_SEL J2-3 150pF...

  • Page 192: Figure 12-14. Uhf (403-440 Mhz) Board Top Side View (8486635Z03-O)

    12-16 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists D301 C488 C465 R480 C458 C454 C513 S444 C480 J471 R470 R473 R264 U451 R254 FL54 R496 L265 L255 C470 R253 C267 C473 R481 R472 C256 C257 C302 C489 C482 R522 C455...

  • Page 193: Figure 12-15. Uhf (403-440 Mhz) Board Bottom Side View (8486635Z03-O)

    UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-17 R206 C206 C52 C53 C220 C417 R416 R411 D121 U151 C222 R434 L140 R502 R433 R432 C221 FL51 C122 R150 R501 C223 C157 L132 L141 C224 C132 C159 R151 SH200 R154 C158...

  • Page 194: Figure 12-16. Uhf (403-440 Mhz) Keypad Board (8466565A03-B)

    12-18 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists Component Side Solder Side Figure 12-16. UHF (403-440 MHz) Keypad Board (8466565A03-B) June, 2005 6881096C25-B...

  • Page 195: Uhf (403-440 Mhz) Radio Parts List (8486635Z03-O)

    UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-19 UHF (403-440 MHz) Radio Parts List (8486635Z03-O) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Circuit Motorola Part No. Part No. Part No. Description Part No. 2113743N46 CAP, 68pF C152 2113743L07 CAP, 390pF...
  • Page 196 12-20 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C406 2113743N50 CAP, 150pF C475 2113743L48 CAP, .022uF D262 4862824C01 1SV229 L211...
  • Page 197 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists 12-21 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. 0662057M43 RES, 51 R206 Not_Placed RES, 100 R421 0662057V27 RES, 100K R499 Not_Placed...

  • Page 198: Uhf (403-440 Mhz) Keypad Board Parts List (8466565A03-B)

    12-22 UHF 403-440 MHz (8486635Z03-O) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Description Description Part No. Part No. U201* 5185963A27 63A27 2113743N50 CAP, 100pF U251 5105750U54 50U54 2113743N50 CAP, 100pF U310 5102478J01 TK71750S 2113743N50 CAP, 100pF U320 5185963A55 LP2986 4809496B11...

  • Page 199: Chapter 12 Uhf 438-470 Mhz (8486348Z13-C) Schematic Diagrams Overlays, And Parts Lists

    UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-23 Chapter 12 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists UHF R2 USWB+ USWB+ USWB+ USWB+ TX_ENA TX_ENA PWR_SET TX_UHF_R2 PWR_SET DEMOD DEMOD RX_FE_UHF_R2 RX_BE BW_SEL BW_SEL IF_IN IF_OUT RX_IN...

  • Page 200: Figure 12-18. Uhf (438-470 Mhz) Receiver Front End Schematic Diagram (8486348Z13-C)

    12-24 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists FE_5R 5.6K UHF R2 Front End 390pF SH40 SHIELD SHIELD UMT1 390pF 390pF 22nH 5.6K 0.1uF C521 C523 4.2V 1.5K FE_IF_OUT 390pF 5.1pF C522 0.45pF IF_OUT 680nH 6.7% 9.1pF 6.2pF 7.5pF 8.2pF...

  • Page 201: Figure 12-19. Uhf (438-470 Mhz) Receiver Back End Schematic Diagram (8486348Z13-C)

    UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-25 RX Back End (Overtone) U52-1 FL53 TC7W04F CFWC455E 0.1uF OUT 2 U52-2 100K TC7W04F IF_BAND_SEL 5V for 25kHz BW_SE L 0V for 12.5kHz FL54 0.1uF CFWC455G 1 IN U52-3 47pF 3.3K SH50...

  • Page 202: Figure 12-20. Uhf (438-470 Mhz) Synthesizer Schematic Diagram (8486348Z13-C)

    12-26 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists UHF R2 Synthesizer FN_V_SF 4.5V V_SF SH200 SH201 SHIELD SHIELD C232 C233 C231 R230 R247 0.1uF 1000pF 4.7uF FN_LOCK LOCK LOCK: 3V WARP 25 C204 INDMULT 16 UNLOCK: 0V SFOUT 28 470pF ADAPTSW 46...

  • Page 203: Figure 12-21. Uhf (438-470 Mhz) Voltage Controlled Oscillator Schematic Diagram (8486348Z13-C)

    UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-27 UHF R2 VCO V_SF VCO_VSF R273 R277 L270 4.5V V_S F 220nH C292 C274 C270 C285 L282 R284 0.1uF 390pF VCO_3V 15nH 390pF 0.1uF L272 220nH SH250 SH251 SH253 SHIELD SHIELD SHIELD...

  • Page 204: Figure 12-22. Uhf (438-470 Mhz) Transmitter And Power Control Schematic Diagram (8486348Z13-C)

    12-28 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists UHF R2 Tx PA_USWB+ USWB+ PA_TX_EN A TX_ENA C170 390pF Q171 Q170 EMB10 C171 390pF SH100 SHIELD C157 C154 R152 0.1uF 390pF 100K C155 R158 C151 R153 U151 100K 1.5K 390pF C150...

  • Page 205: Figure 12-23. Uhf (438-470 Mhz) Controller Interconnect Schematic Diagram (8486348Z13-C)

    UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-29 Controller SW_B +3 V VS_AUDIO_SEL CNTL_PWR_SET OPT_MI C PWR_SET PWR_SET OPT_TX_AUD_FLAT_RETURN CNTL_DEMO D DEMO D DEMOD OPT_TX_AUD_RETURN CNTL_BW_SEL OPT_TX_AUD_SEN D BW_SEL AUDI O BW_SEL OPT_RX_AUD_SEND_DETECTO R OPT_RX_AUD_SEND_UNMUTED MOD_OUT MOD_OUT CNTL_16_8_MHZ OPT_RX_AUD_RETURN 16_8_MHZ...

  • Page 206: Figure 12-24. Uhf (438-470 Mhz) Microprocessor Circuitry Schematic Diagram (8486348Z13-C)

    12-30 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists Microprocessor D3_3 V D3_3V C418 R410 R416 R417 D3_3V 0.1uF Q410 C410 C411 C413 C412 TP402 R412 R411 0.1uF 1000pF 0.1uF 10uF 100K SC I TP405 SH401 SH400 C419 SHIELD SHIELD 1000pF...

  • Page 207: Figure 12-25. Uhf (438-470 Mhz) Audio Circuitry Schematic Diagram (8486348Z13-C)

    UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-31 R516 R523 Audio C512 C514 R522 Q520 6.8pF 16pF IMX1 100K R512 150K R514 5V_A 100K U510-1 LM2904 Q520 IMX1 R511 C518 R513 DEMOD C460 R515 VR471 100K 0.1uF R470 OPT_RX_AUD_SEND_DETECTO R 5V_A...

  • Page 208: Figure 12-26. Uhf (438-470 Mhz) Dc Regulation Schematic Diagram (8486348Z13-C)

    12-32 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists DC Regulation USWB+ U310 TK71750S F301 VR301 J301 MMBZ5250B 1 VIN VOUT 4 CTRL D301 C301 C303 C304 C312 BYPASS C311 C313 DATA 390pF 33uF .01uF .018uF 10uF .01uF Q311 C310 .01uF...

  • Page 209: Figure 12-27. Uhf (438-470 Mhz) Keypad Option Schematic Diagram (8466565A03-B)

    UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-33 DISPLAY MODULE CONNECTOR LEDBL MAIN BOARD CONNECTOR LEDBL J2-9 J1-9 LEDBL J2-16 16 J1-8 Vddd J2-17 17 J1-7 J2-10 10 J1-6 Vddd Vddd DATA J2-1 J1-5 DATA J2-2 J1-4 LCD_SEL J2-3 150pF...

  • Page 210: Figure 12-28. Uhf (438-470 Mhz) Board Top Side View (8486348Z13-C)

    12-34 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists D301 C488 C465 C458 R480 C454 C513 S444 C480 J471 R470 R473 R264 U451 R254 FL54 R496 L265 L255 C470 R253 C257 C267 C473 C256 R481 C302 R472 C489 C482 R522 L264...

  • Page 211: Figure 12-29. Uhf (438-470 Mhz) Board Bottom Side View (8486348Z13-C)

    UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-35 C124 C121 R206 C52 C53 C206 C220 D121 R416 C417 R411 C136 U151 L121 C222 C134 C123 R434 L140 R502 R433 C122 R432 C135 C221 FL51 R150 R501 C223 L132 L141 C131...

  • Page 212: Figure 12-30. Uhf (438-470 Mhz) Keypad Board (8466565A03-B)

    12-36 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists Component Side Solder Side Figure 12-30. UHF (438-470 MHz) Keypad Board (8466565A03-B) June, 2005 6881096C25-B...

  • Page 213: Uhf (438-470 Mhz) Radio Parts List (8486348Z13-C)

    UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-37 UHF (438-470 MHz) Radio Parts List (8486348Z13-C) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Circuit Motorola Part No. Part No. Part No. Description Part No. 2113743N46 CAP, 68pF C137 2113740F59 CAP, 220pF...
  • Page 214 12-38 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C400 Not_Placed CAP, .022uF C467 2113743L19 CAP, 1200pF D201 4862824C03 1SV232 L131...
  • Page 215 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists 12-39 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. 0662057N09 RES, 27K R162 0662057M98 RES, 10K R418 0662057N23 RES, 100K R496 Not_Placed...

  • Page 216: Uhf (438-470 Mhz) Keypad Board Parts List (8466565A03-B)

    12-40 UHF 438-470 MHz (8486348Z13-C) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Description Description Part No. Part No. U151 2484657R01 57R01 2113743N50 CAP, 100pF U201* 5185963A27 63A27 2113743N50 CAP, 100pF U251 5105750U54 50U54 2113743N50 CAP, 100pF U310 5102478J01 TK71750S 2113743N50...

  • Page 217: Chapter 12 Uhf 465-495 Mhz (8486634Z02-O) Schematic Diagrams Overlays, And Parts Lists

    UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-41 Chapter 12 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists UHF R3 USWB + USWB + USWB+ USWB TX_ENA TX_ENA PWR_SET TX_UHF_R3 PWR_SET DEMOD DEMOD RX_FE_UHF_R3 RX_BE CONTROLLER BW_SEL BW_SEL...

  • Page 218: Figure 12-32. Uhf (465-495 Mhz) Receiver Front End Schematic Diagram (8486634Z02-O)

    12-42 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists UHF R3 Front End FE_5R 5.6K 390pF SH40 SHIELD SHIELD UMT1 390pF 390pF 22nH 0.1uF 5.6K C521 4.2V C523 3.7% 1.2K 390pF 2.7pF C522 0.5pF IF 1 0.5pF 0.79V RX_IN 1.1% 1.25%...

  • Page 219: Figure 12-33. Uhf (465-495 Mhz) Receiver Back End Schematic Diagram (8486634Z02-O)

    UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-43 RX Back End (Overtone) U52-1 FL53 TC7W04F CFWC455E 0.1uF OUT 2 U52-2 100K TC7W04F IF_BAND_SEL 5V for 25kHz BW_SE L 0V for 12.5kHz 0.1uF FL54 CFWC455G 1 IN 47pF U52-3 3.3K SH50...

  • Page 220: Figure 12-34. Uhf (465-495 Mhz) Synthesizer Schematic Diagram (8486634Z02-O)

    12-44 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists UHF R3 Synthesizer FN_V_SF 4.5V V_SF C231 C232 C233 R230 R247 0.1uF 1000pF 4.7uF SH201 SH200 SHIELD SHIELD FN_LOCK LOCK LOCK: 3V C204 31 NC3 UNLOCK: 0V WARP 470pF 29 NC2 INDMULT 17 NC1...

  • Page 221: Diagram (8486634Z02-O)

    UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-45 UHF R3 VCO V_SF VCO_VSF L270 R273 R277 4.5V V_S F 220nH C274 C292 C270 VCO_3V 390pF 0.1uF 390pF C285 L272 C272 0.1uF 220nH SH250 SH251 SH253 0.1uF SHIELD SHIELD SHIELD L282...

  • Page 222: Figure 12-36. Uhf (465-495 Mhz) Transmitter And Power Control Schematic Diagram (8486634Z02-O)

    12-46 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists UHF R3 Tx PA_USWB+ USWB+ PA_TX_EN A TX_ENA C170 390pF Q171 Q170 EMB10 SH100 SHIELD C525 C172 390pF R120 C157 C154 390pF 0.1uF 390pF R152 100K 1% R121 C160 R158 C151 R153...

  • Page 223: Figure 12-37. Uhf (465-495 Mhz) Controller Interconnect Schematic Diagram (8486634Z02-O)

    UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-47 Controller SW_B +3 V VS_AUDIO_SEL CNTL_PWR_SET OPT_MI C PWR_SET PWR_SET OPT_TX_AUD_FLAT_RETURN CNTL_DEMO D DEMO D DEMOD OPT_TX_AUD_RETURN CNTL_BW_SEL OPT_TX_AUD_SEN D BW_SEL BW_SEL AUDI O OPT_RX_AUD_SEND_DETECTO R OPT_RX_AUD_SEND_UNMUTED MOD_OUT MOD_OUT CNTL_16_8_MHZ OPT_RX_AUD_RETURN 16_8_MHZ...

  • Page 224: Figure 12-38. Uhf (465-495 Mhz) Microprocessor Circuitry Schematic Diagram (8486634Z02-O)

    12-48 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists Microprocessor D3_3 V D3_3V C418 R410 R416 R417 D3_3V 0.1uF Q410 C410 C411 C413 C412 TP402 R412 R411 0.1uF 1000pF 0.1uF 10uF 100K SC I TP405 SH401 SH400 C419 SHIELD SHIELD 1000pF...

  • Page 225: Figure 12-39. Uhf (465-495 Mhz) Audio Circuitry Schematic Diagram (8486634Z02-O)

    UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-49 R516 R523 Audio C512 C514 R522 Q520 6.8pF 16pF IMX1 100K R512 150K R514 5V_A 100K U510-1 LM2904 Q520 IMX1 R511 C518 R513 DEMOD C460 R515 VR471 100K 0.1uF R470 OPT_RX_AUD_SEND_DETECTO R 5V_A...

  • Page 226: Figure 12-40. Uhf (465-495 Mhz) Dc Regulation Schematic Diagram (8486634Z02-O)

    12-50 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists DC Regulation USWB+ U310 TK71750S F301 VR301 J301 MMBZ5250B 1 VIN VOUT 4 CTRL D301 C301 C303 C304 BYPASS C311 C312 C313 DATA 47pF .01uF .018uF .01uF 33uF 10uF Q311 C310 .01uF...

  • Page 227: Figure 12-41. Uhf (465-495 Mhz) Keypad Board Schematic Diagram (8466565A03-B)

    UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-51 LEDBL DISPLAY MODULE CONNECTOR MAIN BOARD CONNECTOR LEDBL J2-9 J1-9 LEDBL J2-16 16 J1-8 Vddd J2-17 17 J1-7 J2-10 10 J1-6 Vddd Vddd DATA J2-1 J1-5 DATA J2-2 J1-4 LCD_SEL J2-3 150pF...

  • Page 228: Figure 12-42. Uhf (465-495 Mhz) Board Top Side View (8486634Z02-O)

    12-52 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists D301 C488 C465 R480 C458 C454 C513 S444 C480 J471 R470 R473 R264 U451 R254 FL54 R496 L265 L255 C470 R253 C267 C473 R481 R472 C256 C257 C302 C489 C482 R522 L264...

  • Page 229: Figure 12-43. Uhf (465-495 Mhz) Board Bottom Side View (8486634Z02-O)

    UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-53 C121 C124 C206 R206 C52 C53 C417 R416 C220 D121 C136 U151 R411 L121 C222 C134 R434 C123 R502 R433 R432 C122 C135 C141 C221 FL51 R150 R501 C223 C157 L132 L141...

  • Page 230: Figure 12-44. Uhf (465-495 Mhz) Keypad Board (8466565A03-B)

    12-54 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists Component Side Solder Side Figure 12-44. UHF (465-495 MHz) Keypad Board (8466565A03-B) June, 2005 6881096C25-B...

  • Page 231: Uhf (465-495 Mhz) Radio Parts List (8486634Z02-O)

    UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-55 UHF (465-495 MHz) Radio Parts List (8486634Z02-O) Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Circuit Motorola Part No. Part No. Part No. Description Part No. 2113743N46 CAP, 68pF C137 2113740F59 CAP, 220pF...
  • Page 232 12-56 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C401 2113743M24 CAP, 0.1uF C470 2113743E20 CAP, 0.1uF D201 4862824C03 1SV232 L130...
  • Page 233 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists 12-57 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. 0662057M92 RES, 5.6K R158 0662057M78 RES, 1.5K R417 0662057M98 RES, 10K R495 0662057M92...

  • Page 234: Uhf (465-495 Mhz) Keypad Board Parts List (8466565A03-B)

    12-58 UHF 465-495 MHz (8486634Z02-O) Schematic Diagrams, Overlays, and Parts Lists Circuit Motorola Circuit Motorola Description Description Part No. Part No. 5109522E10 TC7W04F 2113743N50 CAP, 100pF U110 0186438Z02 RA07M4452M_UHF 2113743N50 CAP, 100pF U150 5113818A01 LM2904 2113743N50 CAP, 100pF U151 2484657R01 57R01 2113743N50 CAP, 100pF...

  • Page 235: Index

    INDEX Antenna Matching Network, UHF 403-440 MHz Theory Of Operation .......8-4 Antenna Matching Network, UHF 438-470 MHz Theory Of Operation .......9-4 Antenna Matching Network, UHF 465-495 MHz Theory Of Operation ......10-4 Antenna Matching Network, VHF 136-162 MHz Theory Of Operation........4-4 Antenna Matching Network, VHF 146-174 MHz Theory Of Operation........5-4 Antenna Switch, UHF 403-440 MHz Theory Of Operation..........8-3 Antenna Switch, UHF 438-470 MHz Theory Of Operation..........9-3...
  • Page 236 INDEX: DC Power Distribution Theory of Operation................2-1 DC Regulation and Distribution Theory of Operation............2-1 Disclaimer ..........................ii Document Copyrights......................ii Foreword ..........................ii Fractional-N Synthesizer, UHF 403-440 MHz Theory Of Operation ........8-5 Fractional-N Synthesizer, UHF 438-470 MHz Theory Of Operation ........9-5 Fractional-N Synthesizer, UHF 465-495 MHz Theory Of Operation .........10-5 Fractional-N Synthesizer, VHF 136-162 MHz Theory Of Operation ........4-5 Fractional-N Synthesizer, VHF 146-174 MHz Theory Of Operation ........5-5...
  • Page 237 INDEX: Keypad, VHF 146-174 MHz Theory Of Operation...............5-7 List of Figures........................ix List of Tables ........................xii Memory Usage Controller Theory of Operation ..............3-2 Microprocessor 7.3975 MHz Clock Controller Theory of Operation........3-4 Microprocessor Circuitry Controller Theory of Operation ............3-1 Microprocessor Power-Up, Power-Down and Reset Routine Controller Theory of Operation......................3-3 Notes For All Schematics and Circuit Boards, UHF ............12-1 Notes For All Schematics and Circuit Boards, VHF ............7-1...
  • Page 238 INDEX: Sensing of Externally-Connected Accessories Controller Theory of Operation....3-3 Serial Bus Control of Circuit Controller Blocks Theory of Operation........3-2 Service Aids ........................1-2 Six Layer Circuit Board, UHF ....................12-3 Six Layer Circuit Board, VHF ....................7-3 Speaker and Microphone Parts List, UHF.................12-3 Speaker and Microphone Parts List, VHF ................7-3 Speaker and Microphone Schematic, UHF ...............12-3 Speaker and Microphone Schematic, VHF .................7-3...
  • Page 239 INDEX: Transmitter Power Amplifier ................8-3 Antenna Switch....................8-3 Harmonic Filter ....................8-3 Antenna Matching Network ..................8-4 Power Control......................8-4 UHF Frequency Generation Circuitry ................8-4 Fractional-N Synthesizer ..................8-5 Voltage Controlled Oscillator (VCO) ................8-6 Keypad ..........................8-7 UHF 438-470 MHz Theory Of Operation................9-1 Introduction........................9-1 UHF Receiver........................9-1 Receiver Front End....................9-1 Receiver Back End ....................9-2 UHF Transmitter ......................9-3...
  • Page 240 INDEX: Notes For All Schematics and Circuit Boards ............7-1 Six Layer Circuit Board....................7-3 Speaker and Microphone Schematic ................7-3 Speaker and Microphone Parts List ................7-3 VHF 136-162 MHz Theory Of Operation................4-1 Introduction ........................4-1 VHF Receiver........................4-1 Receiver Front-End ....................4-1 Receiver Back-End....................4-2 VHF Transmitter ......................4-3 Transmit Power Amplifier ..................4-3 Antenna Switch .......................4-3 Harmonic Filter ......................4-3...
  • Page 241 INDEX: 6881096C25-B June, 2005...
  • Page 242 INDEX: Notes: June, 2005 6881096C25-B...
  • Page 244 MOTOROLA and The Stylized M logo are trademarks of Motorola, Inc. All other product or service names are the property of their respective owners. © 2005 Motorola, Inc. All rights reserved. Printed in U.S.A. *6881096C25* 6881096C25-B...

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