Motorola EP350 Service Manual
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Motorola EP350 Service Manual

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EP350
Portable Radios
Detailed Service Manual

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  • Page 1 EP350 Portable Radios Detailed Service Manual...
  • Page 3 Service Manuals need to be updated accordingly. If you wish to be informed of these updates, kindly fill in and fax us your details. Fax to: 6-04-6124944 The Technical Publications Coordinator, Global Customer Documentation, R&D Department, Motorola Penang. Your Details Name/Contact Person: Company Name: Address: Telephone No.: Fax No.:...
  • Page 4 Kindly take a few moments to provide feedback on this manual. Thank you for your cooperation. Fax to: 6-04-6124944 The Technical Publications Coordinator, Global Customer Documentation, R&D Department, Motorola Penang. 1. Please check all the appropriate boxes: Disassembly Procedures Alignment Procedures...

  • Page 5: Computer Software Copyrights

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive royalty-free license to use that arises by operation of law in the sale of a product.

  • Page 6: Safety Information

    Product Safety and RF Exposure booklet enclosed with your (Motorola Publication part number 68007024010) to ensure compliance with RF energy exposure limits. For a list of Motorola-approved antennas, and other accessories, visit the following web site which lists approved accessories: http://www.motorola.com/radiosolutions...

  • Page 7: Document History

    DOCUMENT HISTORY The following major changes have been implemented in this manual since the previous edition: Edition Description Date 6878422A01-A Initial edition Mar, 2009 6878422A01-B Added VHF and UHF1 band information (Chapter 8, August, 2009 9, 10, 11, 12, 13)
  • Page 8 Notes...

  • Page 9: Table Of Contents

    Table of Contents Table of Contents Copyright ......................i Safety Information..................ii Document History ..................iii Chapter 1 Maintenance ................ 1-1 Preventive Maintenance ........................ 1-1 Inspection ............................1-1 Cleaning............................1-1 Safe Handling of CMOS and LDMOS.................... 1-2 General Repair Procedures and Techniques ................1-2 Chapter 2 Test Equipment, Service Aids, and Service Tools...
  • Page 10 Table of Contents 4.3.8 Battery indicator ........................ 4-5 Chapter 5 435 – 480 MHz UHF2 Theory Of Operation ....... 5-1 Introduction ............................ 5-1 UHF2 Receiver ..........................5-1 5.2.1 Receiver Front End ......................5-2 5.2.2 Receiver Back End ......................5-2 UHF2 Transmitter .......................... 5-3 5.3.1 Power Amplifier.........................
  • Page 11 Table of Contents 8.4.3 Voltage Doubler and Charge Pump .................. 8-5 8.4.4 Loop Filter ......................... 8-5 8.4.5 Dual VCO.......................... 8-5 Keypad............................8-6 Chapter 9 VHF Troubleshooting Tables ..........9-1 Troubleshooting Table for Receiver (VHF) ................... 9-1 Troubleshooting Table for Synthesizer (VHF) ................9-2 Troubleshooting Table for Transmitter (VHF) ................
  • Page 12 viii Table of Contents 13.1.1 Notes For All Schematics and Circuit Boards ..............13-1 13.1.2 Four Layer Circuit Board ....................13-3 13.2 Speaker and Microphone Schematic ................... 13-3 13.2.1 Speaker and Microphone Parts List................13-3 13.3 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)........13-1 13.3.1 Parts List ........................
  • Page 13 List of Figures List of Figures Figure 2-1. Programming/Test Cable (PMDN4077_R)............... 2-3 Figure 2-2. Cloning Cable (PMDN4076_R) ..................2-3 Figure 2-3. Wiring of the Connectors....................2-3 Figure 3-1. DC Power Distribution Block Diagram................3-1 Figure 4-1. RX Audio Circuit ....................... 4-1 Figure 4-2.
  • Page 14 List of Figures Figure 13-4. VCO and PLL Schematic Diagram ................. 13-2 Figure 13-5. Transmitter Schematic Diagram ..................13-3 Figure 13-6. Microprocessor and Keypad Schematic Diagram ............13-4 Figure 13-7. Audio Power Amplifier and External Audio Schematic Diagram ........13-5 Figure 13-8.
  • Page 15 List of Tables List of Tables Table 1-1. Lead Free Solder Wire Part Number List ................. 1-3 Table 1-2. Lead Free Solder Paste Part Number List ............... 1-3 Table 2-1. Recommended Test Equipment..................2-1 Table 2-2. Service Aids ........................2-2 Table 3-1.

  • Page 16: Notations Used In This Manual

    Notations Used in This Manual Notations Used in This Manual Throughout the text in this publication, you will notice the use of the following notations. These notations are used to emphasize that safety hazards exist, and due care must be taken and observed. Note An operational procedure, practice, or condition that isessential to emphasize.
  • Page 17 Summary of Printed Circuit Boards and Bands Available xiii Summary of Printed Circuit Boards and Bands Available Table below lists all the bands available in this manual. Frequency Bandwidth Power Level PC Board Part Number Board Chapter Band Revision 8431BEACON200 UHF2 435 –...
  • Page 18 Notes...

  • Page 19: Chapter 1 Maintenance

    In order to maintain compliance, radios that are FM Approved to intrinsically safe standards MUST be repaired at FM audited service centers. See Further Assistance From Motorola on page 1-2 for more information. Preventive Maintenance Periodic visual inspection and cleaning is recommended.

  • Page 20: Safe Handling Of Cmos And Ldmos

    Equipment (WEEE) Directive 2002/96/EC and Restriction of Hazardous Subtances (ROHS) Directive 2002/95/EC). To maintain product compliance and reliability, use only the Motorola specified parts in this manual. For the identification of lead (Pb) free assemblies, all EPP products will carry the EPP Marking, shown below, on the printed circuit board (PCB).

  • Page 21: Table 1-1. Lead Free Solder Wire Part Number List

    When damaged parts are replaced, identical parts should be used. If the identical replacement component is not locally available, check the parts list for the proper Motorola part number and order the component from the nearest Motorola Communications parts center listed in the “Piece Parts”...
  • Page 22 Introduction • To replace a chip component using a soldering iron: Select the appropriate micro-tipped soldering iron and apply fresh solder to one of the solder pads. Using a pair of tweezers, position the new chip component in place while heating the fresh solder.

  • Page 23: Chapter 2 Test Equipment, Service Aids, And Service Tools

    Chapter 2 Test Equipment, Service Aids, and Service Tools Test Equipment Table 2-1 lists test equipment required to service the radios. Table 2-1. Recommended Test Equipment Motorola Part No. Description Characteristics Application R2600 series or System analyzer This item will substitute for...

  • Page 24: Service Aids

    Test Equipment, Service Aids, and Service Tools: Service Aids Service Aids Table 2-2 lists the service aids recommended for working on the EP350 Series 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 25: Figure 2-1. Programming/Test Cable (Pmdn4077_R)

    Test Equipment, Service Aids, and Service Tools: Service Aids Programming/Test Cable 2.5mm stereo USB connection t Figure 2-1. Programming/Test Cable (PMDN4077_R) 2.5mm stereo 2.5mm stereo Figure 2-2. Cloning Cable (PMDN4076_R) VBUS VBUS TX_D To Computor RX_D 2.5mm stereo > 4, 5, 6 USB_CONNECTOR IC : CP2102 RX / TX data...
  • Page 26 Test Equipment, Service Aids, and Service Tools: Service Aids Notes...

  • Page 27: Chapter 3 Dc Power Distribution

    Chapter 3 DC Power Distribution DC Regulation and Distribution A block diagram of the DC power distribution throughout the radio is shown in Figure 3-1. VCTCXO Audio filter Regulator ½ Vcc Voltage Doubler RX B+ Charge SWB+ 7.5V Pump Battery TXVB Mech SW1 3.3V...

  • Page 28: Table 3-1. Voltage Regulators

    DC Power Distribution: DC Regulation and Distribution The following regulators are used: Table 3-1. Voltage Regulators Reference No. Description Type U505 5V regulator TK11250 U506 3.3V regulator TK11233 U507 Voltage Doubler (10V) TC12140 The 5 V source from U505 is applied to: •...

  • Page 29: Chapter 4 Controller Theory Of Operation

    Chapter 4 Controller Theory of Operation RX Audio Circuit The RX audio circuit consists of Audio Processor IC, Audio Amplifier, Internal (INT)/External (EXT) speaker and Sub-Audio Tones System. Audio Processor IC (AK2347) RXA1 RX LPF TX/RX HPF Audio IN Scrambler/ Expander Descrambler emphasis...

  • Page 30: Rx Tone Pl/Digital Pl Decode Filtering

    Controller Theory of Operation: RX Audio Circuit • De-emphasis: This circuit restores the original state of signal of which high-frequency component has been emphasized by the pre-emphasis. • Expander: This circuit expands the signal compressed twice by the Compressor in dB scale to restore the original signal state.

  • Page 31: Tx Audio Circuit

    Controller Theory of Operation: TX Audio Circuit TX Audio Circuit The TX audio circuit consists of MIC/External MIC, LPF, Audio processor IC, and TX Sub-tone system. For UHF1 and UHF2, refer to Figure 4-2. For VHF, refer to Figure 4-3. 4 Order LPF (Fc=4KHz) (Audio IN)

  • Page 32: Mic And External Mic

    Controller Theory of Operation: TX Audio Circuit 4.2.1 MIC and External MIC The TX audio enters the radio via the internal MIC or the external MIC jack. When using the internal MIC, the audio passes through the external jack then rest of the circuits. When using the external jack, the audio from the internal MIC is cut-off from the rest of the circuits and the external MIC audio is passed to the rest of the circuits.

  • Page 33: Tx Audio Amplifier And 6 Order 3 Khz Low-Pass Filter

    Controller Theory of Operation: Microprocessor Circuitry 4.2.4 TX audio amplifier and 6 order 3 kHz Low-Pass filter The TX audio signal from ASIC Pin 8 (UHF1, UHF2) or U508 Pin 4 (VHF) is linked by TX audio amp (U502-C) to increase limiting range. The limited audio signal is adjusted to a proper level by U508 and passes through 6 order 3 kHz low pass filter (U501-A,B) before being modulated.

  • Page 34: Sensing Of Vox Operating

    Controller Theory of Operation: Microprocessor Circuitry 4.3.5 Sensing of VOX operating Port PTT2 (Pin 68) is used to detect the presence of VOX operating when externally connected accessories with VOX enabled. When port PTT2 is low, the VOX will start to operate. 4.3.6 Microprocessor Power-on reset Routine On power-up, the microprocessor is held in reset until the digital 3.3V regulator (U506 Pin 4)

  • Page 35: Chapter 5 435 - 480 Mhz Uhf2 Theory Of Operation

    Chapter 5 435 – 480 MHz UHF2 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. UHF2 Receiver The UHF2 receiver design covers the frequency range of 435 –...

  • Page 36: Receiver Front End

    435 – 480 MHz UHF2 Theory Of Operation: UHF2 Receiver 5.2.1 Receiver Front End Incoming RF signals from antenna are first routed through the harmonic filter (L409, L410, L411, C426, C427, C428, C429, C445, C446) and antenna switch (CR301), part of the transmitter circuitry, before being applied to the receiver front end.

  • Page 37: Uhf2 Transmitter

    435 – 480 MHz UHF2 Theory Of Operation: UHF2 Transmitter UHF2 Transmitter The UHF2 transmitter covers the range of 435 – 480 MHz. Depending on model, the output power of the transmitter is switchable on a per-channel basis between high power (4 Watts) and low power (1 Watt).

  • Page 38: Auto Power Control

    435 – 480 MHz UHF2 Theory Of Operation: UHF2 Frequency Generation Circuitry 5.3.4 Auto Power Control The APC keeps the current supply constant to the final amp (Q403). The drain current of Q403 (final amp) is sensed across resistor R417. The voltage difference across R417 is amplified through U401 by the ratio of R423 to R417.

  • Page 39: Pll Ic Prescaler And Comparator

    435 – 480 MHz UHF2 Theory Of Operation: UHF2 Frequency Generation Circuitry 5.4.2 PLL IC Prescaler and Comparator The reference frequency from VCTCXO is divided to 6.25 kHz or 5 kHz by reference counter, R. The RF signal input from the VCO is divided to by prescaler (1/64), divided by N and A counters in PLL IC to determine frequency steps and then supplied to the comparator.

  • Page 40: Keypad

    435 – 480 MHz UHF2 Theory Of Operation: Keypad Keypad Left, Right and P1 to P3 keys are directly connected to microprocessor via 22 pin connector. When any of these keys is pressed, the voltage goes "low" and microprocessor detects it. For full keypad models, the number keys are in matrix type which consisted of 3 rows and 4 columns.

  • Page 41: Chapter 6 Uhf2 Troubleshooting Tables

    Chapter 6 UHF2 Troubleshooting Tables Troubleshooting Table for Receiver (UHF2) Table 6-1. Troubleshooting Table for Receiver (UHF2) Symptom Possible Causes Procedure Corrective Action Radio Dead (no 1. Battery dead or Substitute good battery or battery Change or replace battery. turn–on beep, no defective eliminator LED indication)

  • Page 42: Troubleshooting Table For Synthesizer (Uhf2)

    UHF2 Troubleshooting Tables: Troubleshooting Table for Synthesizer (UHF2) Troubleshooting Table for Synthesizer (UHF2) Table 6-2. Troubleshooting Table for Synthesizer (UHF2) Symptom Possible Causes Procedure Corrective Action Synthesizer Out of 1. Defective 12.8 MHz Verify clock output FL701 Pin 3 is Repair/Replace FL701 Lock (No RX VCTCXO...

  • Page 43: Troubleshooting Table For Transmitter (Uhf2)

    UHF2 Troubleshooting Tables: Troubleshooting Table for Transmitter (UHF2) Troubleshooting Table for Transmitter (UHF2) Table 6-3. Troubleshooting Table for Transmitter (UHF2) Symptom Possible Causes Procedure Corrective Action No internal Mic 1. Mic dead or defective Verify audio present (~10mV rms) Replace Mic. audio when speaking into Mic.

  • Page 44: Troubleshooting Table For Board And Ic Signals (Uhf2)

    UHF2 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF2) Troubleshooting Table for Board and IC Signals (UHF2) Table 6-4. Troubleshooting Table for Board and IC Signals (UHF2) IC Designator Pin Function DC Voltage (V) Comments (Condition) U201(IF IC) Osc1 44.645 MHz input Osc2...
  • Page 45 UHF2 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF2) Table 6-4. Troubleshooting Table for Board and IC Signals (UHF2) (Continued) IC Designator Pin Function DC Voltage (V) Comments (Condition) (DTMF decoder) Vref OSC1 3.579545 MHz input High At DTMF detecting ST/GT FL701(VCTCXO) VCON...
  • Page 46 UHF2 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF2) Table 6-4. Troubleshooting Table for Board and IC Signals (UHF2) (Continued) IC Designator Pin Function DC Voltage (V) Comments (Condition) Q601 Audio_MUTE_CON Mute: Low None Mute: High Mode Mute: High None Mute: Low 1.

  • Page 47: Chapter 7 Uhf2 Schematic Diagrams, Overlays, And Parts Lists

    (nF), picofarads (pF) or microfarads (µF), and inductance values are in nanohenries (nH) or microhenries (µH). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multimeter or equivalent. If the board has been removed from the chassis, the transmitter module mounting screws may be used for ground connection.
  • Page 48 UHF2 Schematic Diagrams, Overlays, and Parts Lists: Introduction 6. Reference Designators are assigned in the following manner: Ref. No. Series Circuit Block Microprocessor & audio control 101 – 199 circuits 1001 – 1099 Microprocessor & audio control circuits 201 – 299 IF IC circuit 301 –...

  • Page 49: Four Layer Circuit Board

    MIC1 MATES WITH J103 ON RADIO BOARD SPK1 MATES WITH J603 ON RADIO BOARD Figure 7-2. Speaker and Microphone Schematic 7.2.1 Speaker and Microphone Parts List Reference Motorola Part No. Description Designator MIC1 PMDN4139_R Microphone SPK1 Speaker & Cable PMDN4067BR...

  • Page 50: Circuit Board/Schematic Diagram And Parts List (Uhf2: 435-480 Mhz)

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) RX_B + R320 100R C310 L304 0.1uF 39nH RX_B + C320 KRA305 10uF / 16V(A) Q304 C312 C362 C372 C304 C374 C318 R302 C319 C382...

  • Page 51: Figure 7-4. Vco And Pll Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) R701 L701 Q705 27nH R702 KRA305 1.5K C538 C539 C701 C702 10nF 10uF / 16V(A) 22uF / 10V(A) Q701 2SC4226 RX_EN C728 R703 C705 VCO_OUT(RX) 4.7K (1%) Q702 Q706 C710 2SC4226 R706 TZY02 KRA305...

  • Page 52: Figure 7-5. Transmitter Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) TO_RX C464 R412 47pF Q405 R413 KTC4075 Q404 8.2K Zo = 50 STB1188 0.8t * 1.4(W) SWB+ C406 R440 0.1uF R411 560R R414 CR301 CR311 C462 C463 KDS114 L301 470pF 45145TL R406 R409 R410...

  • Page 53: Figure 7-6. Microprocessor And Keypad Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) +3.3V SDA VSS LCD101 LCD_BEACON R139 U104 24LC64 LCD Flex.PCB C147 +3.3V U106_SW 0.1uF(K) SWB+ J101 PTT2 05004HR_07C01S(G) 20KHZ_SEL R155 PLL_PS 470R BUSY CR110 CR111 R156 PLL_CLK Q110 PLL_STB U102_SDATA CR112 CR113 PLL_DATA R157...

  • Page 54: Figure 7-7. Audio Power Amplifier And External Audio Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) SW/VOL1 RY8418 BEEP +3.3V R131 10R C602 0.22uF(K) C1038 C100 47pF 1uF(1608) C1026 C623 47pF 47pF R1001 C615 0.22uF (K)(1608) C114 C112 C620 220pF 10uF/16V 330pF R1003 10K RX_AF1 C619 33pF R1002 9.1K C113...

  • Page 55: Figure 7-8. Switches And Battery Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 1 / 2VCC R524 47K(1%) +` 12 SWB+ NJM324 C531 U502-D R523 C533 0.1uF 30K(1%) 0.1uF C545 U505 TK11250AMTL 22uF / 10V(A) C501 470pF C502 R734 22uF / 16V(B) VOUT C503 0.1uF U501_pin4 SW/VOL1...

  • Page 56: Figure 7-9. Transmitter Audio Filter And Sub-Tone Schematic Diagram

    7-10 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) +3.3V J601 0980683Z01 R194 C140 47nF C518 R103 C520 5.6nF 150K 6.8nF MIC1 C142 0B27P40(2.8mm) 470pF C111 C101 C103 R101 R102 PROGRAM_DATA 1uF(K) 1uF(K) 33pF R511 R510 L604 C546 R513 R512 8.2K 2.2uH(1608)

  • Page 57: Figure 7-10. Uhf2 (435-480 Mhz) Mainboard Top Side: Pcb No. 8431Beacon200

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-11 L602 J603 L601 J105 L604 L603 J601 R616 C617 C602 C623 R608 R619 R421 R419 Q602 Q601 C460 R420 C433 R423 C432 PB501 C461 R424 R417 Q408 U401 C471 C573 R433 C472 Q407...

  • Page 58: Figure 7-11. Uhf2 (435-480 Mhz) Mainboard Bottom Side: Pcb No. 8431Beacon200

    7-12 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) ANT4 ANT1 ANT3 ANT2 C431 R416 L410 C429 L409 ANT5 R621 C445 L324 R620 C605 C301 L411 C540 L301 U601 R330 R613 CR401 CR307 C466 CR310 R415 C609 R610 L412 CR309 Q301 C422...

  • Page 59: Figure 7-12. Uhf2 (435-480 Mhz) Sub Circuit Board Top View: Pcb No. 8421Beacon100

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-13 R501 R502 CR501 Q501 Q502 C560 C561 Figure 7-12. UHF2 (435–480 MHz) Sub Circuit Board Top View: PCB No. 8421BEACON100...

  • Page 60: Figure 7-13. Uhf2 (435-480 Mhz) Sub Circuit Board Bottom View: Pcb No. 8421Beacon100

    7-14 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) SW / VOL1 J104 Figure 7-13. UHF2 (435–480 MHz) Sub Circuit Board Bottom View: PCB No. 8421BEACON100...

  • Page 61: Figure 7-14. Uhf2 (435-480 Mhz) Keypad Board: Pcb No. 8422Beacon100

    Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-15 C1018 MIC1 J101 C176 C175 R155 C174 C187 R199 R147 C1005 C1004 SH201 CR110 CR111 R196 R197 R198 R161 R160 R159 C1001 R156 C1007 C1002 C1008 C1003 C1006 R158 CR114 CR115 R108 C1012...

  • Page 62: Parts List

    7-16 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7.3.1 Parts List Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Circuit Supplier Supplier Part No. Description C130 – Chip Cap,1005 K 333PF C172 –...
  • Page 63 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-17 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C310 – Chip Cap, 1005 Z 0.1μF C362 – Chip Cap, 1005 D 10PF C429 –...
  • Page 64 7-18 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C472 – Chip Cap, 1005 K 470PF C531 – Chip Cap, 1005 Z 0.1μF C575 –...
  • Page 65 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-19 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C706 – Chip Cap, 1005 C 3PF C746 – Chip Cap, 1005 D 10PF C1018 –...
  • Page 66 7-20 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. CR113 BRIGHT LED – LED DIODE, BL-HG036D- CR501 BRIGHT LED –...
  • Page 67 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-21 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. L406 TAIYOYUDEN – Chip Ind, 1608 220nH J Q102 –...
  • Page 68 7-22 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. Q703 – 2SC4226 BJT NPN R118 KAMAYA – Chip Res, 1005 J 47KΩ R152 KAMAYA –...
  • Page 69 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-23 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. R190 KAMAYA – Chip Res, 1005 J 15KΩ R317 KAMAYA –...
  • Page 70 Chip Res, 1005 J 7.5KΩ SH103 BGTech 8660BEACA4010 Shield CAN, PA R540 KAMAYA – Chip Res, 1005 J 47KΩ R719 KAMAYA – Chip Res, 1005 J 1KΩ SH105 MOTOROLA PMDN4149AR Finger Strip TX R541 KAMAYA – Chip Res, 1005 J 330KΩ...
  • Page 71 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-25 Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. SH201 MOTOROLA PMDN4151AR Finger Strip–Pair U508 BGTech 8191401150320 MIRCO CHIP,DIGITAL POTENTIOMETER, SPK1 BGTech 8400362424100 SHINMYUNG, Speaker, MCP4011(503) 24Ω...
  • Page 72 7-26 Notes...

  • Page 73: Chapter 8 136 - 174 Mhz Vhf Theory Of Operation

    Chapter 8 136 – 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 10 of this manual. VHF Receiver The VHF receiver design covers the frequency range of 136 –...

  • Page 74: Receiver Front End

    136 – 174 MHz VHF Theory Of Operation: VHF Receiver 8.2.1 Receiver Front End Incoming RF signals from antenna are first routed through the harmonic filter (L409, L410, L411, C426, C427, C428, C429, C445, C446) and antenna switch (CR301), part of the transmitter circuitry, before being applied to the receiver front end.

  • Page 75: Vhf Transmitter

    136 – 174 MHz VHF Theory Of Operation: VHF Transmitter VHF Transmitter The VHF transmitter covers the range of 136 – 174 MHz. Depending on model, the output power of the transmitter is switchable on a per-channel basis between high power (5 Watts) and low power (1 Watt).

  • Page 76: Auto Power Control

    136 – 174 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry 8.3.4 Auto Power Control The APC keeps the current supply constant to the final amp (Q403). The drain current of Q403 (final amp) is sensed across resistor R417. The voltage difference across R417. The differential signal at the output of U401 (pin 7) is passed to Q404 and Q405 that produces a constant power output to the antenna.

  • Page 77: Pll Ic Prescaler And Comparator

    136 – 174 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry 8.4.2 PLL IC Prescaler and Comparator The reference frequency from VCTCXO is divided to 6.25 kHz or 5 kHz by reference counter, R. The RF signal input from the VCO is divided to by prescaler (1/64), divided by N and A counters in PLL IC to determine frequency steps and then supplied to the comparator.

  • Page 78: Keypad

    136 – 174 MHz VHF Theory Of Operation: Keypad Keypad Left, Right and P1 to P3 keys are directly connected to microprocessor via 22 pin connector. When any of these keys is pressed, the voltage goes "low" and microprocessor detects it. For full keypad models, the number keys are in matrix type which consisted of 3 rows and 4 columns.

  • Page 79: Chapter 9 Vhf Troubleshooting Tables

    Chapter 9 VHF Troubleshooting Tables Troubleshooting Table for Receiver (VHF) Table 9-1. Troubleshooting Table for Receiver (VHF) Symptom Possible Causes Procedure Corrective Action Radio Dead (no 1. Battery dead or Substitute good battery or battery Change or replace battery. turn–on beep, no defective eliminator LED indication)

  • Page 80: Troubleshooting Table For Synthesizer (Vhf)

    VHF Troubleshooting Tables: Troubleshooting Table for Synthesizer (VHF) Troubleshooting Table for Synthesizer (VHF) Table 9-2. Troubleshooting Table for Synthesizer (VHF) Symptom Possible Causes Procedure Corrective Action Synthesizer Out of 1. Defective 12.8 MHz Verify clock output FL701 pin 3 is Repair/Replace FL701 Lock (No RX VCTCXO...

  • Page 81: Troubleshooting Table For Transmitter (Vhf)

    VHF Troubleshooting Tables: Troubleshooting Table for Transmitter (VHF) Troubleshooting Table for Transmitter (VHF) Table 9-3. Troubleshooting Table for Transmitter (VHF) Symptom Possible Causes Procedure Corrective Action No internal Mic 1. Mic dead or defective Verify audio present (~10mV rms) Replace Mic. audio when speaking into Mic.

  • Page 82: Troubleshooting Table For Board And Ic Signals (Vhf)

    VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (VHF) Troubleshooting Table for Board and IC Signals (VHF) Table 9-4. Troubleshooting Table for Board and IC Signals (VHF) IC Designator Pin Function DC Voltage (V) Comments (Condition) U201(IF IC) Osc1 44.645 MHz input Osc2...
  • Page 83 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (VHF) Table 9-4. Troubleshooting Table for Board and IC Signals (VHF) (Continued) IC Designator Pin Function DC Voltage (V) Comments (Condition) (DTMF decoder) Vref OSC1 3.579545 MHz input High At DTMF detecting ST/GT FL701(VCTCXO) VCON...
  • Page 84 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (VHF) Table 9-4. Troubleshooting Table for Board and IC Signals (VHF) (Continued) IC Designator Pin Function DC Voltage (V) Comments (Condition) Q601 Audio_MUTE_CON Mute: Low None Mute: High Mode Mute: High None Mute: Low 1.

  • Page 85: Chapter 10 Vhf Schematic Diagrams, Overlays, And Parts Lists

    (nF), picofarads (pF) or microfarads (µF), and inductance values are in nanohenries (nH) or microhenries (µH). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multimeter or equivalent. If the board has been removed from the chassis, the transmitter module mounting screws may be used for ground connection.
  • Page 86 10-2 VHF Schematic Diagrams, Overlays, and Parts Lists: Introduction 6. Reference Designators are assigned in the following manner: Ref. No. Series Circuit Block Microprocessor & audio control 101 – 199 circuits 1001 – 1099 Microprocessor & audio control circuits 201 – 299 IF IC circuit 301 –...

  • Page 87: Four Layer Circuit Board

    MIC1 MATES WITH J103 ON RADIO BOARD SPK1 MATES WITH J603 ON RADIO BOARD Figure 10-2. Speaker and Microphone Schematic 10.2.1 Speaker and Microphone Parts List Reference Motorola Part No. Description Designator MIC1 PMDN4139_R Microphone SPK1 Speaker & Cable PMDN4067BR...

  • Page 88: Circuit Board/Schematic Diagram And Parts List (Vhf: 136-174 Mhz)

    10-1 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10.3 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) R316 100K R314 100R C312 C314 L335 C316 L336 R305 BUSY 27nH 27nH RX_B+ R315 C338 CR306 C334 RSSI 100R 47nF KDS160E C309...

  • Page 89: Figure 10-4. Vco And Pll Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-2 RX_B+ KRA305 C320 Q304 10uF/16V(A) Q305 C319 KRC404 10nF RX_EN C343 C380 C344 470pF 0.1uF 470pF SH101 R701 100R L701 100nH R702 C702 Q705 3K(1%) C538 C539 KRA305 10nF 10uF/16V(A) C701 22uF / 10V(A) Q701...

  • Page 90: Figure 10-5. Transmitter Schematic Diagram

    10-3 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) TO_RX R412 R413 3.9K 8.2K Q405 KTC4075 CR3002 Q404 STB1188 SWB+ C415 C406 R411 0.1uF 3.3K R414 Zo = 50 4.7K 0.8t 1.4(W) C411 R409 TX_VCO_B+ CR311 R406 R410 C402 CR301 C403 L413...

  • Page 91: Figure 10-6. Microprocessor And Keypad Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-4 +3.3V VCC A0 LCD101 R139 U104 LCD_BEACON 24LC64 C147 +3.3V LCD Flex.PCB U106_SW 0.1uF(K) SWB+ J101 PTT2 05004HR - 0701S(G) 20KHZ_SEL R155 470R PLL_PS BUSY R156 CR110 CR111 PLL_CLK Q110 PLL_STB SH201 R157...

  • Page 92: Figure 10-7. Audio Power Amplifier And External Audio Schematic Diagram

    10-5 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) AUDIO_IN C615 0.22uF (K) (1608) C619 33pF SPK1 R614 560K J603 SM3624X1 R615 53047-0210 R613 U601 C617 R619 OUT- R636 0.1uF(K) 560R J601 C616 L601 0980683Z01 0.1uF(K) R616 R609 2.2uH(1608) R635 0R MODE OUT+...

  • Page 93: Figure 10-8. Switches And Battery Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-6 1/2 VCC R524 47K(1%) SWB+ NJM324 C531 U502-D R523 C533 0.1uF 30K(1%) 0.1uF C545 U505 22uF/10V(A) TK11250AMTL C501 470pF C502 R734 22uF/16V(B) VOUT C503 U501_pin4 0.1uF RX_AF2 SW / VOL1 +3.3V RY8418 U507...

  • Page 94: Figure 10-9. Transmitter Audio Filter And Sub-Tone Schematic Diagram

    10-7 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) R137 4.7M C135 47pF C139 R135 0.1uF(K) CR117 1/2VCC KDS160E C137 R136 NJM324 0.1uF(K) R138 100K C136 105-D CR116 220K 0.1uF R111 KDS160E +3.3V R120 +3.3V J601 0980683Z01 C138 Q114 VOX_EN 0.22U(K)(1608) R194...

  • Page 95: Figure 10-10. Receiver Audio Filter And Sub-Tone Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-8 +3.3V +3.3V R150 R181 10K(1%) 150R R131 R104 R105 R106 C199 C191 C190 C153 470P 220pF 10uF/16V R151 12K(1%) C154 C100 1uF(1608) C602 0.22uF(K) C112 R1001 SW/VOL1 C114 10uF/16V R1003 RY8418 220pF RX_AF1...

  • Page 96: Figure 10-11. Vhf (136-174 Mhz) Mainboard Top Side: Pcb No. 8431Beacon400

    10-9 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) J603 J105 L602 L601 J601 R616 C617 L604 C602 R608 L603 R619 R421 R419 Q601 C461 PB501 C460 R420 C433 R423 C432 C439 R424 R417 Q408 U401 Q407 R499 R433 B401 Q406 R426...

  • Page 97: Figure 10-12. Vhf (136-174 Mhz) Mainboard Bottom Side: Pcb No. 8431Beacon400

    Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-10 ANT4 ANT1 ANT3 ANT2 L410 C431 R416 C430 C429 L409 ANT5 C620 R621 C615 R620 C605 L326 C445 C301 L301 C540 L411 L303 U601 C305 C321 R610 CR401 C609 R358 L304 L412 R415...

  • Page 98: Figure 10-13. Vhf (136-174 Mhz)Sub Circuit Board Top View: Pcb No. 8421Beacon100

    10-11 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) R501 R502 CR501 Q501 Q502 C560 C561 Figure 10-13. VHF (136–174 MHz) Sub Circuit Board Top View: PCB No. 8421BEACON100...

  • Page 99: Figure 10-14. Vhf (136-174 Mhz)Sub Circuit Board Bottom View: Pcb No. 8421Beacon100

    Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-12 SW / VOL1 J104 Figure 10-14. VHF (136–174 MHz) Sub Circuit Board Bottom View: PCB No. 8421BEACON100...

  • Page 100: Figure 10-15. Vhf (136-174 Mhz) Keypad Board: Pcb No. 8422Beacon100

    10-13 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) C1018 MIC1 J101 C176 C175 R155 C174 C187 R199 R147 C1005 C1004 SH201 CR110 CR111 R196 R197 R198 R161 R160 R159 C1001 R156 C1007 C1002 C1008 C1003 C1006 R158 CR114 CR115 R108 C1012...

  • Page 101: Parts List

    Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-14 10.3.1 Parts List Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Circuit Supplier Supplier Part No. Description C127 – Chip Cap, 1006 K 47nF C169 –...
  • Page 102 10-15 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C301 – Chip Cap, 1005 J 47pF C340 – Chip Cap,1005 K 0.1μF C422 –...
  • Page 103 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-16 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C502 HITACH – Chip Tantal, 22uF-M/ C538 – Chip Cap,1005 K 10nF C618 HITACH –...
  • Page 104 10-17 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C727 – Chip Cap, 1005 C 3PF C1010 – Chip Cap, 1005 J 47PF CR305 –...
  • Page 105 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-18 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. FL701 BGTech 8289012R80010 SHINSUNG, VCTCXO, L327 TAIYOYUDEN – Chip Ind,1608 K 820NH L604 TAIYOYUDEN –...
  • Page 106 10-19 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. Q122 – KRC 404 Q504 – KRC 404 BJT NPN R106 KAMAYA –...
  • Page 107 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-20 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. KAMAYA – Chip Res, 1005 J 100KΩ R173 KAMAYA –...
  • Page 108 10-21 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. R402 KAMAYA – Chip Res, 1005 J 39Ω R432 KAMAYA –...
  • Page 109 SH103 BG Tech 8660BEACA4010 PA SHIELD CAN R722 KAMAYA – Chip Res, 1005 J 22KΩ BG Tech 8192088L70020 DTMF RECEIVER, SH104 MOTOROLA PMDN4137AR Finger Strip PCB U103 MT88L70 R723 KAMAYA – Chip Res, 1005 J 1.2KΩ SH105 MOTOROLA PMDN4137AR Finger Strip PCB...
  • Page 110 10-23 Notes...

  • Page 111: Chapter 11 403 - 447 Mhz Uhf1 Theory Of Operation

    Chapter 11 403 – 447 MHz UHF1 Theory Of Operation 11.1 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 14 of this manual. 11.2 UHF1 Receiver The UHF1 receiver design covers the frequency range of 403 –...

  • Page 112: Receiver Front End

    11-2 403 – 447 MHz UHF1 Theory Of Operation: UHF1 Receiver 11.2.1 Receiver Front End Incoming RF signals from antenna are first routed through the harmonic filter (L409 – L411, C426 – C429, C445, C446) and antenna switch (CR301), part of the transmitter circuitry, before being applied to the receiver front end.

  • Page 113: Uhf1 Transmitter

    403 – 447 MHz UHF1 Theory Of Operation: UHF1 Transmitter 11-3 11.3 UHF1 Transmitter The UHF1 transmitter covers the range of 403 – 447MHz. Depending on model, the output power of the transmitter is switchable on a per-channel basis between high power (4 Watt) and low power (1 Watt).

  • Page 114: Auto Power Control

    11-4 403 – 447 MHz UHF1 Theory Of Operation: UHF1 Frequency Generation Circuitry 11.3.4 Auto Power Control The APC keeps the current supply constant to the final amp (Q403). The drain current of Q403 (final amp) is sensed across resistor R417. The differential signal at the output of U401 (Pin 7) is passed to Q404 and Q405 that produces a constant power output to the antenna.

  • Page 115: Pll Ic Prescaler And Comparator

    403 – 447 MHz UHF1 Theory Of Operation: UHF1 Frequency Generation Circuitry 11-5 11.4.2 PLL IC Prescaler and Comparator The reference frequency from VCTCXO is divided to 6.25kHz or 5kHz by reference counter, R. The RF signal input from the VCO is divided to by prescaler (1/64), divided by N and A counters in PLL IC to determine frequency steps and then supplied to the comparator.

  • Page 116: Keypad

    11-6 403 – 447 MHz UHF1 Theory Of Operation: Keypad 11.5 Keypad Left, Right and P1 to P3 keys are directly connected to microprocessor via 22 Pin connector. When any of these keys is pressed, the voltage goes “low” and microprocessor detects it. For full keypad models, the number keys are in matrix type which consisted of 3 rows and 4 columns.

  • Page 117: Chapter 12 Uhf1 Troubleshooting Tables

    Chapter 12 UHF1 Troubleshooting Tables 12.1 Troubleshooting Table for Receiver (UHF1) Table 12-1. Troubleshooting Table for Receiver (UHF1) Symptom Possible Causes Procedure Corrective Action Radio Dead (no 1. Battery dead or Substitute good battery or battery Change or replace battery. turn–on beep, no defective eliminator...

  • Page 118: Troubleshooting Table For Synthesizer (Uhf1)

    12-2 UHF1 Troubleshooting Tables: Troubleshooting Table for Synthesizer (UHF1) 12.2 Troubleshooting Table for Synthesizer (UHF1) Table 12-2. Troubleshooting Table for Synthesizer (UHF1) Symptom Possible Causes Procedure Corrective Action Synthesizer Out of 1. Defective 12.8 MHz Verify clock output FL701 Pin 3 is Repair/Replace FL701 Lock (No RX VCTCXO...

  • Page 119: Troubleshooting Table For Transmitter (Uhf1)

    UHF1 Troubleshooting Tables: Troubleshooting Table for Transmitter (UHF1) 12-3 12.3 Troubleshooting Table for Transmitter (UHF1) Table 12-3. Troubleshooting Table for Transmitter (UHF1) Symptom Possible Causes Procedure Corrective Action No internal Mic 1. Mic dead or defective Verify audio present (~10mV rms) Replace Mic.

  • Page 120: Troubleshooting Table For Board And Ic Signals (Uhf1)

    12-4 UHF1 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF1) 12.4 Troubleshooting Table for Board and IC Signals (UHF1) Table 12-4. Troubleshooting Table for Board and IC Signals (UHF1) IC Designator Pin Function DC Voltage (V) Comments (Condition) U201(IF IC) Osc1 44.645 MHz input...
  • Page 121 UHF1 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF1) 12-5 Table 12-4. Troubleshooting Table for Board and IC Signals (UHF1) (Continued) IC Designator Pin Function DC Voltage (V) Comments (Condition) (DTMF decoder) Vref OSC1 3.579545 MHz input High At DTMF detecting ST/GT FL701(VCTCXO)
  • Page 122 12-6 UHF1 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF1) Table 12-4. Troubleshooting Table for Board and IC Signals (UHF1) (Continued) IC Designator Pin Function DC Voltage (V) Comments (Condition) Q601 Audio_MUTE_CON Mute: Low None Mute: High Mode Mute: High None Mute: Low 1.

  • Page 123: Uhf1 Schematic Diagrams, Overlays, And Parts Lists

    (nF), picofarads (pF) or microfarads (µF), and inductance values are in nanohenries (nH) or microhenries (µH). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multimeter or equivalent. If the board has been removed from the chassis, the transmitter module mounting screws may be used for ground connection.
  • Page 124 13-2 UHF1 Schematic Diagrams, Overlays, and Parts Lists: Introduction 6. Reference Designators are assigned in the following manner: Ref. No. Series Circuit Block Microprocessor & audio control 101 – 199 circuits 1001 – 1099 Microprocessor & audio control circuits 201 – 299 IF IC circuit 301 –...

  • Page 125: Figure 13-1. Four-Layer Circuit Board: Copper Steps In Layer Sequence

    MIC1 MATES WITH J103 ON RADIO BOARD SPK1 MATES WITH J603 ON RADIO BOARD Figure 13-2. Speaker and Microphone Schematic 13.2.1 Speaker and Microphone Parts List Reference Motorola Part No. Description Designator MIC1 PMDN4139_R Microphone SPK1 Speaker & Cable PMDN4067BR...

  • Page 126: Figure 13-3. Uhf1 (403-447 Mhz) Receiver Schematic Diagram

    13-1 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13.3 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) Figure 13-3. UHF1 (403–447 MHz) Receiver Schematic Diagram...

  • Page 127: Figure 13-4. Vco And Pll Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-2 Figure 13-4. VCO and PLL Schematic Diagram...

  • Page 128: Figure 13-5. Transmitter Schematic Diagram

    13-3 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) Figure 13-5. Transmitter Schematic Diagram...

  • Page 129: Figure 13-6. Microprocessor And Keypad Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-4 Figure 13-6. Microprocessor and Keypad Schematic Diagram...

  • Page 130: Figure 13-7. Audio Power Amplifier And External Audio Schematic Diagram

    13-5 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) Figure 13-7. Audio Power Amplifier and External Audio Schematic Diagram...

  • Page 131: Figure 13-8. Switches And Battery Schematic Diagram

    Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-6 Figure 13-8. Switches and Battery Schematic Diagram...

  • Page 132: Figure 13-9. Transmitter Audio Filter And Sub-Tone Schematic Diagram

    13-7 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) Figure 13-9. Transmitter Audio Filter and Sub-tone Schematic Diagram...

  • Page 133: Figure 13-10. Uhf1 (403-447 Mhz) Mainboard Top Side: Pcb No. 8431Beauhf300

    Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-8 L605 J603 L602 J105 L601 C636 J601 R616 R617 C623 C602 R608 L604 R619 L603 PB501 Q602 Q601 C460 R421 R419 C461 R420C433R423 R417 Q408 C635 C634 C471 C573 U401 R433 C472 Q407...

  • Page 134: Figure 13-11. Uhf1 (403-447 Mhz) Mainboard Bottom Side: Pcb No. 8431Beauhf300

    13-9 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) ANT4 ANT1 ANT3 ANT2 L410 C431 R416 C429 L409 R621 C445 R620 C605 L324 C301 L411 C540 L301 R330 R613 C357 U601 CR307 C466 CR310 L412 R415 C609 R610 CR309 Q301 C422 C309...

  • Page 135: Figure 13-12. Uhf1 (403-447 Mhz) Sub Circuit Board Top View: Pcb No. 8421Beacon100

    Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-10 R501 R502 CR501 Q501 Q502 C560 C561 Figure 13-12. UHF1 (403–447 MHz) Sub Circuit Board Top View: PCB No. 8421BEACON100...

  • Page 136: Figure 13-13. Uhf1 (403-447 Mhz) Sub Circuit Board Bottom View: Pcb No. 8421Beacon100

    13-11 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) SW / VOL1 J104 Figure 13-13. UHF1 (403–447 MHz) Sub Circuit Board Bottom View: PCB No. 8421BEACON100...
  • Page 137 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-12 MIC1 C1018 SH202 J101 C176 C175 R155 C174 C187 R199 R147 C1005 C1004 SH201 CR110 CR111 R196 R197 R198 R161 R160 R159 C1001 C1008 R156 C1007 C1002 C1003 C1006 R158 CR114 CR115 R108...
  • Page 138 13-13 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13.3.1 Parts List Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Circuit Supplier Supplier Part No. Description C135 Chip Cap,1005 J 47PF C176 Chip Cap,1005 J 220PF Ref.
  • Page 139 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-14 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C330 Chip Cap,1005 J 47PF C386 Chip Cap,1005 J 12PF C445 Chip Cap,1608 C 6PF C331...
  • Page 140 13-15 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C512 Chip Cap,1005 K 470PF C560 Chip Cap,1005 J 47PF C621 Chip Cap,1005 K 330PF C515...
  • Page 141 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-16 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. C738. Chip Cap, 1005 D 7PF C1018 Chip Cap, 1005 J 220PF CR116 SWITCH DIODE, KDS-160E (ESM)
  • Page 142 13-17 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. BGTech 8560228005000 SNAGGWA, BEACON FLAT L327 TAIYOYUDEN Chip Ind,1608 K 820NH L706 DAERIM COIL AIR, 0.30-1.1-...
  • Page 143 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-18 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. Q303 2SC4226 BJT NPN Transis- Q706 KRA 305 BJT PNP Transistor R128 KAMAYA Chip Res, 1005 J 3.9KW...
  • Page 144 13-19 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. R160 KAMAYA Chip Res, 1005 J 47KW R204 KAMAYA Chip Res, 1005 J 22KW R342 KAMAYA...
  • Page 145 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-20 Circuit Circuit Circuit Supplier Supplier Part No. Description Supplier Supplier Part No. Description Supplier Supplier Part No. Description Ref. Ref. Ref. R431 KAMAYA Chip Res, 1005 J 10KW R527 KAMAYA Chip Res, 1005 J 82KW R707 KAMAYA...
  • Page 146 Shield CAN, PLL PCB1 BGTech 8431BEAUHF300 CAFSYSTEM, Main PCB, SH103 BGTech 8660BEACA4010 Shield CAN, PA FR4 4 Layer PCB SH104 MOTOROLA PMDN4150AR Finger Strip, T PCB BGTech 8421BEACON100 CAFSYSTEM, Sub PCB, SH105 MOTOROLA PMDN4149AR Finger Strip TX PCB1 1.2T 2 Layer...

  • Page 147: Replacement Parts

    Product Accessories (including Batteries and Chargers) One (1) Year Motorola, at its option, will at no charge either repair the Product (with new or reconditioned parts), replace it (with a new or reconditioned Product), or refund the purchase price of the Product during the warranty period provided it is returned in accordance with the terms of this warranty.
  • Page 148 Warranty service will be provided by Motorola through one of its authorized warranty service locations. If you first contact the company which sold you the Product, it can facilitate your obtaining warranty service. You can also open a Contact Us case on Motorola Online (www.motorola.com/businessonline).
  • Page 149 • that MOTOROLA will be notified promptly in writing by such purchaser of any notice of such claim • that MOTOROLA will have sole control of the defense of such suit and all negotiations for its settlement or compromise • should the Product or parts become, or in MOTOROLA's opinion be likely to become, the...
  • Page 150 Technical Services (MTS). If no part number is assigned, the part is not normally available from Motorola. If the part number is appended with an asterisk, the part is serviceable by Motorola Depot only. If a parts list is not included, this generally means that no user-serviceable parts are available for that kit or assembly.
  • Page 151 Micro Controller Unit MRTI Motorola Radio-Telephone Interconnect: a system that provides a repeater connection to the Public Switched Telephone Network (PSTN). The MRTI allows the radio to access the telephone network when the proper access code is received.
  • Page 152 Term Definition ® Private-Line tone squelch: a continuous sub-audible tone that is transmitted along with the carrier. Phase-Locked Loop: a circuit in which an oscillator is kept in phase with a reference, usually after passing through a frequency divider. Push-To-Talk: the switch located on the left side of the radio; when pressed, causes the radio to transmit.
  • Page 154 © 2009 Motorola Inc. All rights reserved. Motorola Technology Sdn Bhd (Co. No. 455657-H) Plot 2 Bayan Lepas Technoplex Industrial Park Mukim 12 S.W.D 11900 Penang, Malaysia Printed in Malaysia August 2009 *6878422A01* 6878422A01-B...

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