Motorola CDM Series Service Manual
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Motorola CDM Series Service Manual

Cdm/pro series professional series two-way mobile radios
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Two-Way Mobile Radios
Detailed Service Manual

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Summary of Contents for Motorola CDM Series

  • Page 1 ™ CDM Series ™ PRO Series Professional Series Two-Way Mobile Radios Detailed Service Manual...
  • Page 2 Foreword The information contained in this manual relates to all CDM Series and PRO Series models of Professional Series two-way mobile radios. This manual provides sufficient information to enable qualified service technicians to troubleshoot and repair a Professional Series two-way mobile radio to the component level.
  • Page 3 CDM Series and PRO Series ™ ™ Two-Way Mobile Radios Detailed Service Manual Contents Intrinsically Safe Radio Information Chapter 1: Service Maintainability Chapter 2: Control Head Service Information Chapter 3: Controller Service Maintainability Chapter 4: VHF (136-174 MHz) 1-25W Service Information...
  • Page 4 Notes...

  • Page 5: Table Of Contents

    Chapter 1: i Chapter 1: Service Maintainability Table of Contents Section 1 Introduction 1.0 About this Manual .....................1:1-1 1.1 Scope ......................1:1-1 1.2 Organization ....................1:1-1 1.3 Conventions....................1:1-1 2.0 Warranty and Service Support................1:1-1 2.1 Warranty Period and Return Instructions ............1:1-2 2.2 After Warranty Period ..................1:1-2 2.3 Piece Parts Availability ................1:1-2 2.4 Replacement Parts Ordering ...............1:1-2 2.5 Technical Support..................1:1-3...
  • Page 6 Chapter 1: ii Notes 6881091C63-A...

  • Page 7: Introduction

    (available only in certain countries), and service/repair or spare parts support out of warranty. Any “return for exchange” or “return for repair” to an authorized Motorola Dealer must be accompanied by a Warranty Claim Form. Contact an authorized Motorola dealer for Warranty Claim Forms.

  • Page 8: Warranty Period And Return Instructions

    Warranty and Service Support Warranty Period and Return Instructions The terms and conditions of warranty are defined fully in the Motorola Dealer or Distributor or Reseller contract. These conditions may change from time to time, and the following subsections are for guidance purposes only.

  • Page 9: Technical Support

    Motorola provides technical support to assist dealers, distributors and self-maintained customers in resolving problems, if any, with their unit. When contacting Motorola Technical Support, keep the radio’s model number and the unit’s serial number handy. Technical support contact information is listed below.
  • Page 10 Chapter 1: 1-4 Radio Model Information Notes 6881091C63-A...

  • Page 11: Maintenance

    Chapter 1: 2-1 Section 2 MAINTENANCE Introduction This chapter of the manual describes: preventive maintenance • safe handling of CMOS devices • repair procedures and techniques • Preventive Maintenance The radios do not require a scheduled preventive maintenance program; however, periodic visual inspection and cleaning is recommended.

  • Page 12: Safe Handling Of Cmos And Ldmos

    When replacing damaged parts, use identical part replacements. If an 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 parts center (see the Appendix at the back of this manual).

  • Page 13: Chip Components

    Chapter 1: 2-3 Chip Components Use either the RLN4062 Hot-Air Repair Station or the Motorola 0180381B45 Repair Station for chip component replacement. When using the 0180381B45 Repair Station, select the TJ-65 mini- thermojet hand piece. On either unit, adjust the temperature control to 370°C (700°F), and adjust the airflow to a minimum setting.

  • Page 14: Notes For All Schematics And Circuit Boards

    Unless otherwise stated, resistances are in Ohms (K = 1000, M = 1,000,000), and • capacitances are in picofarads (pF), nanofarads (nF), or microfarads (µF). DC voltages are measured from point indicated to chassis ground using a Motorola DC • multimeter or equivalent. Transmitter measurements should be made with a 1.2 µH (microHenry) choke in series with the voltage probe to prevent circuit loading.
  • Page 15 Notes For All Schematics and Circuit Boards Chapter 1: 2-5 BL K GREEN Back Light Cathode Green BL K RED Back Light Cathode Red BL KP Green Green Keypad Back Light Control BL KP RED Red Keypad Back Light Control BL LCD GREEN Green Display Back Light Control BL LCD RED...
  • Page 16 Chapter 1: 2-6 Notes For All Schematics and Circuit Boards FECTRL 1 Control Voltage for Front-End Filter FECTRL 2 Control Voltage for Front-End Attenuator Switch FLASH CS Flash Chip Select FLASH OE Flash Output Enable FLAT RX SND Option Board Audio Output Signal FLAT TX RTN Flat TX Input from Option Board and Accessory Connector...
  • Page 17 Notes For All Schematics and Circuit Boards Chapter 1: 2-7 LOCK Lock Detect Signal from Synthesizer LSIO Low Speed Clock In / Data Out LVZIF CS LVZIF Chip Select (not used) Microphone Input MISO Serial Peripheral Interface Receive Line MODIN Modulation Signal into the Synthesizer MOSBIAS 2 PA Bias Voltage for Second Stage...
  • Page 18 Chapter 1: 2-8 Notes For All Schematics and Circuit Boards SPKR+ Positive Audio PA Speaker Output SQ DET Squelch Detect Signal µP Clock Signal TEMP SENSE Temperature Sense Line for LCD TEMPSENSE Temperature Sense Line from PA to µP TX/RX VCO Switch Signal TX AUD RTN Option Board Output to Transmit Audio Path TX AUD SND...

  • Page 19: Service Aids

    Table 3-1 lists the service tools recommended for working on the radio. While all of these items are available from Motorola, most are standard workshop equipment items, and any equivalent item capable of the same performance may be substituted for the item listed.
  • Page 20 Chapter 1: 3-2 Recommended Service Tools Motorola Part No. Description Application AARKN4081_ Programming Cable with Internal Programming cable with internal RIB that provides direct connection from computer to radio microphone connector AARKN4083_ Mobile Programming/Test Cable Connects radio to RIB (RLN4008_)

  • Page 21: Recommended Test Equipment

    Recommended Test Equipment Chapter 1: 3-3 Motorola Part No. Description Application R1427_ Board preheater Reduces heatsink on multi-level boards R1453_ Digital readout solder station Digitally controlled soldering iron RLN4008_ Radio Interface Box Enables communications between radio and computer’s serial communications adapter...
  • Page 22 Chapter 1: 3-4 Recommended Test Equipment Motorola Part Description Characteristics Application Number S1339_ RF millivoltmeter 100mV to 3 VRF. RF level measurements 10kHz to 1.2GHz S1348_ Programmable DC power 0–20V DC, 0–5 amps, current limited Bench supply for 7.5V supply...
  • Page 23 Chapter 2: i Chapter 2: Control Head Service Information Table of Contents Section 1 Overview 1.0 CDM750 / PRO3100 Model (GCN6112_)............2:1-1 2.0 CDM1250 / PRO5100 Model (GCN6113_)............2:1-1 3.0 CDM1550 Series / PRO7100 Model (GCN6114_)..........2:1-2 Section 2 Theory of Operation 1.0 Introduction .......................2:2-1 2.0 Control Head (CDM750 / PRO3100) ..............2:2-1 2.1 Power Supplies....................2:2-1 2.2 Power On/Off....................2:2-1...
  • Page 24 Chapter 2: ii 1.2 Troubleshooting Flow Chart for Microprocessor ........2:3-2 2.0 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 Troubleshooting Flow Charts ................2:3-3 2.1 Troubleshooting Flow Chart for On/Off ............2:3-3 2.2 Troubleshooting Flow Chart for Microprocessor .........2:3-4 2.3 Troubleshooting Flow Chart for Display ............2:3-5 2.4 Troubleshooting Flow Chart for Back Light ..........2:3-6 Section 4 Control Head PCBs, Schematics, and Parts Lists...

  • Page 25: Overview

    LEDs to indicate radio status, and a 14-character Liquid Crystal Display (LCD) that displays alphanumerical information (for example, channel number or call address name). The radio uses a Motorola 68HC11E9 microprocessor to control the LEDs and LCD, and communicate with the host radio.

  • Page 26: Cdm1550 Series / Pro7100 Model (Gcn6114_)

    LEDs to indicate radio status, and a 14-character LCD that displays alphanumerical information (for example, channel number or call address name). The radio uses a Motorola 68HC11E9 microprocessor to control the LEDs and the LCD, and communicate with the host radio.

  • Page 27: Theory Of Operation

    µP informs the radio about the pressed knob and the radio’s µP switches the radio off. Microprocessor Circuit The control head uses the Motorola 68HC11E9 µP (U0831) to control the LEDs and to communicate with the host radio. RAM and ROM are contained within the µP.

  • Page 28: Sbep Serial Interface

    Chapter 2: 2-2 Control Head (CDM750 / PRO3100) for a couple of seconds without losing RAM parameters. Diode D0822 prevents radio circuits from discharging this capacitor. There are eight analog-to-digital converter ports (A/D) on the µP. They are labeled within the device block as PE0-PE7.

  • Page 29: Status Led And Back Light Circuit

    Control Head (CDM750 / PRO3100) Chapter 2: 2-3 Status LED and Back Light Circuit All indicator LEDs (red, yellow, and green) are driven by current sources. To change the LED status the host radio sends a data message via SBEP bus to the control head µP. The control head µP determines the LED status from the received message and switches the LEDs on or off via port PB 7 –...

  • Page 30: Electrostatic Transient Protection

    µP will switch the radio off. Microprocessor Circuit The control head uses the Motorola 68HC11E9 µP (U0831) to control the LEDs and the LCD and to communicate with the host radio. RAM and ROM are contained within the µP itself.

  • Page 31: Sbep Serial Interface

    Control Head (CDM1250 / PRO5100 / CDM1550 Series / PRO7100) Chapter 2: 2-5 convert that level to a number ranging from 0 to 255 which can be read by the software to take appropriate action. Pin VRH is the high-reference voltage for the A/D ports on the µP. If this voltage is lower than 5V, the A/D readings will be incorrect.

  • Page 32: Status Led And Back Light Circuit

    Chapter 2: 2-6 Control Head (CDM1250 / PRO5100 / CDM1550 Series / PRO7100) Status LED and Back Light Circuit All indicator LEDs (red, yellow, and green) are driven by current sources. To change the LED status the host radio sends a data message via SBEP bus to the control head µP. The control head µP determines the LED status based the received message and switches the LEDs on or off via port PB 7 –...

  • Page 33: Microphone Connector Signals

    Control Head (CDM1250 / PRO5100 / CDM1550 Series / PRO7100) Chapter 2: 2-7 converter (U0831-18) using temperature sensor U0834. Based on the measured temperature, the µP adjusts the driver output voltage V5, and in turn the display brightness, via a parallel interface. Microphone Connector Signals Signals BUS+, PTT IRDEC, HOOK, MIC, HANDSET AUDIO, FLT A+, 5V and 2 A/D converter inputs are available at the microphone connector J0811.

  • Page 34: Passport Trunking Controller Board (Ptcb)

    Chapter 2: 2-8 Control Head (CDM1250 / PRO5100 / CDM1550 Series / PRO7100) 3.11 PassPort Trunking Controller Board (PTCB) PassPort is an enhanced trunking protocol developed by Trident Microsystems that supports wide- area dispatch networking. A network is formed by linking several trunked sites together to form a single system.

  • Page 35: Troubleshooting Charts

    Chapter 2: 3-1 Section 3 TROUBLESHOOTING CHARTS Control Head CDM750 / PRO3100 Troubleshooting Flow Charts Troubleshooting Flow Chart for On/Off Radio does not turn on when On/Off/Volume Knob is pressed Check / Replace R0823 Pin TAB R0822 / VR0822 / = 5V? D0822 / C0822 Press and hold...

  • Page 36: Troubleshooting Flow Chart For Microprocessor

    Chapter 2: 3-2 Control Head CDM750 / PRO3100 Troubleshooting Flow Charts Troubleshooting Flow Chart for Microprocessor Power up alert tone sounds, but Volume knob does not operate and indicator does not light up EXTAL Check / Replace U0831 Pin 31 R0831 / U0833 / U0831 = 8.00 MHz? RESET...

  • Page 37: Control Head Cdm1250 / Pro5100 / Cdm1550 Series / Pro7100 Troubleshooting Flow Charts

    Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 Troubleshooting Flow Charts Chapter 2: 3-3 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 Troubleshooting Flow Charts Troubleshooting Flow Chart for On/Off Radio does not turn on when On/Off/Volume Knob is pressed Check / Replace R0823 Pin TAB...

  • Page 38: Troubleshooting Flow Chart For Microprocessor

    Chapter 2: 3-4 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 Troubleshooting Flow Charts Troubleshooting Flow Chart for Microprocessor Power up alert tone sounds, but Volume knob does not operate and indicator does not light up EXTAL Check / Replace U0831 Pin 31 R0831 / U0833 / U0831 = 8.00 MHz?

  • Page 39: Troubleshooting Flow Chart For Display

    Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 Troubleshooting Flow Charts Chapter 2: 3-5 Troubleshooting Flow Chart for Display Power up alert tone sounds, Volume knob works, indicator/back light is on, but the display is blank V5 (against 5V) TP0973 between Check LCD Assembly -6V and -7V?

  • Page 40: Troubleshooting Flow Chart For Back Light

    Chapter 2: 3-6 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 Troubleshooting Flow Charts Troubleshooting Flow Chart for Back Light Power up alert tone sounds, Volume knob works, indicator lights up, display works, but back light does not turn on U0831 Pin 58 Check for short...
  • Page 41 Chapter 2: 4-1 Section 4 CONTROL HEAD PCBS, SCHEMATICS, AND PARTS LISTS Allocation of Schematics and Circuit Boards Table 2-1 Control Head CDM750 / PRO3100 Diagrams and Parts Lists PCB 8486146B07: Page: Main Board Top Side 2: 4-3 Main Board Bottom Side 2: 4-3 SCHEMATICS: Sheet 1 of 2...

  • Page 42: Allocation Of Schematics And Circuit Boards

    Chapter 2: 4-2 Allocation of Schematics and Circuit Boards Notes 6881091C63-A...

  • Page 43: Control Head Cdm750 / Pro3100 Pcb 8486146B07, Schematics, And Parts Lists

    Control Head CDM750 / PRO3100 PCB 8486146B07, Schematics, and Parts Lists Chapter 2: 4-3 Control Head CDM750 / PRO3100 PCB 8486146B07, Schematics, and Parts Lists D0877 D0878 D0879 D0873 D0872 S0865 S0866 R0823 D0886 D0884 JU0853 JU0852 D0874 D0871 JU0854 D0876 D0875 S0864...
  • Page 44 Chapter 2: 4-4 Control Head CDM750 / PRO3100 PCB 8486146B07, Schematics, and Parts Lists J0801 CONTROL HEAD CONNECTOR VR0823 C0811 VR0811 C0810 C0843 C0813 R0811 470pF 5.6V 470pF 470pF 470pF J0801-14 R0810 J0801-13 EXT_KP_COL J0811-10 EXT_KP_COL R0812 J0801-12 SCI_TX WARIS FLT_A+ J0811-1 FLT_A+...
  • Page 45 Control Head CDM750 / PRO3100 PCB 8486146B07, Schematics, and Parts Lists Chapter 2: 4-5 FLT_A+ D0885 INT_KP_COL D0886 green green R0867 R0866 D0888 D0884 green R0861 green D0887 D0881 green green INT_KP_ROW 1 P1 1 P1 S0861 S0865 Q0881 Q0885 5 P5 5 P5 4 P4...
  • Page 46 TANT CP 2.2uF 10% 10V R0815 0662057A76 13k 1/16W 5% C0823 2113741F49 10nF 50V R0816 0662057A90 51k 1/16W 5% * Motorola Depot Servicing only C0824 2113741F49 10nF 50V R0821 0662057A73 10k 1/16W 5% C0831 2311049A42 TANT CP 3.3uF 10% 6V...

  • Page 47: Control Head Cdm1250 / Pro5100 / Cdm1550 Series / Pro7100 Pcb 8486155B06, Schematics, And Parts Lists

    Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 PCB 8486155B06, Schematics, and Parts Lists Chapter 2: 4-7 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 PCB 8486155B06, Schematics, and Parts Lists D0879 D0880 D0877 S0854 U0834 H0971 R0823 S0853...
  • Page 48 Chapter 2: 4-8 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 PCB 8486155B06, Schematics, and Parts Lists WARIS GM300 J0801 CONTROLHEAD J0801-14 CONNECTOR J0811 J0801-13 MICROPHONE J0801-12 SCI_TX CONNECTOR VR0811 J0801-11 P0801-1 C0808 82pF VR0812 J0801-10 P0801-2 R0811 5.6V Shown from Front Side C0810...
  • Page 49 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 PCB 8486155B06, Schematics, and Parts Lists Chapter 2: 4-9 KEYPAD B LAYOUT SW0902 SW0910 SW0906 ROW1 SW0903 SW0908 SW0905 S0901 S0902 S0903 SWITCH SWITCH SWITCH ROW2 KEYPAD C LAYOUT R0901 SW0906 SW0904 SW0902...
  • Page 50 Chapter 2: 4-10 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 PCB 8486155B06, Schematics, and Parts Lists BACKLIGHT GREEN BACKLIGHT RED Q0931 Q0933 FLT_A+ FLT_A+ D0969 D0973 D0977 D0981 D0985 D0931 D0935 D0939 D0943 D0947 D0951 D0955 D0961 D0965 R0931 R0941...
  • Page 51 Control Head CDM1250 / PRO5100 / CDM1550 Series / PRO7100 PCB 8486155B06, Schematics, and Parts Lists Chapter 2: 4-11 DISPLAY THE LCD IS PART OF HARDWARE KITS GLN7358A (EUR) AND GLN7359A (US) H0971 04B01 SED1526F0A U0971 RESET C0972 CH_KP_ID(0:7) C0971 R0973 TP0973 C0984...
  • Page 52 Not used in Control Head B C0975 2113743E20 100nF 16V J0801 0902636Y02 CONNECTOR FLEX 12 PIN R0859 0662057A89 47k 1/16W 5% * Motorola Depot Servicing only C0976 2113743E20 100nF 16V J0811 2864287B01 CONN TELCO 10 PIN JACK R0860 0662057A97 100k 1/16W...
  • Page 53 Chapter 3: i Chapter 3: Controller Service Maintainability Table of Contents Section 1 Theory of Operation 1.0 Controller Circuits .....................3:1-1 1.1 Overview......................3:1-1 1.2 General......................3:1-1 1.3 Radio Power Distribution ................3:1-2 1.4 Electronic ON/OFF ..................3:1-4 1.5 Emergency ....................3:1-4 1.6 Mechanical ON/OFF..................3:1-5 1.7 Ignition ......................3:1-5 1.8 Microprocessor Clock Synthesizer ..............3:1-5 1.9 Serial Peripheral Interface (SPI)..............3:1-6 1.10 SBEP Serial Interface..................3:1-7...
  • Page 54 Chapter 3: ii 5.0 Controller T11 Schematics and Parts Lists.............3:3-31 6.0 Controller T12 Schematics and Parts Lists.............3:3-37 6881091C63-A...

  • Page 55: Theory Of Operation

    MUX ICs, the On/Off circuit, and general purpose Input/Output circuitry. The controller uses the Motorola 68HC11FL0 microprocessor (U0101). The controller also has three external memory devices. These devices consist of a 32KByte SRAM (U0122), a 512KByte FLASH EEPROM (U0121), and a 16KByte EEPROM (U0111).

  • Page 56: Radio Power Distribution

    Chapter 3: 1-2 Controller Circuits External To Synthesizer Microphone Internal Microphone 16.8 MHz Reference Clock Audio/Signaling from Synthesizer Architecture External Speaker Recovered Audio Audio ASFIC_CMP Internal from Synthesizer Speaker Section (5V_RF) µP Clock To RF Section SCI to Accessory & Control Head Digital Connector...
  • Page 57 Controller Circuits Chapter 3: 1-3 Transistor Q0681 and resistors R0681 / R0682 divide the regulated 9.3V down to about 6 volts. This voltage supplies the 5V regulator, located on the RF section. By reducing the supply voltage of the regulator, the power dissipation is divided between the RF section and the controller section. The voltage VSTBY, which is derived directly from the supply voltage by components R0621 and VR0621, is used to buffer the internal RAM.

  • Page 58: Electronic On/Off

    Chapter 3: 1-4 Controller Circuits Electronic ON/OFF The radio has circuitry which allows radio software and/or external triggers to turn the radio on or off without direct user action (for example, automatic turn on when ignition is sensed and off when ignition is off).

  • Page 59: Mechanical On/Off

    Controller Circuits Chapter 3: 1-5 Mechanical ON/OFF This refers to the typical On/Off/Volume knob, located on the control head, and which turns the radio on and off. If the radio is turned off and the On/Off/Volume knob is pressed, line ON OFF CONTROL (J0401 pin 11) goes high and switches the radio’s voltage regulators on as long as the button is pressed.

  • Page 60: Serial Peripheral Interface (Spi)

    Chapter 3: 1-6 Controller Circuits The ASFIC CMP synthesizer loop uses C0245, C0246 and R0241 to set the switching time and jitter of the clock output. If the synthesizer cannot generate the required clock frequency it will switch back to its default 3.6864MHz output. Because the ASFIC CMP synthesizer and the µP system will not operate without the 16.8 MHz reference clock it (and the voltage regulators) should be checked first when debugging the system.

  • Page 61: Sbep Serial Interface

    Controller Circuits Chapter 3: 1-7 1.10 SBEP Serial Interface The SBEP serial interface allows the radio to communicate with the Customer Programming Software (CPS), or the Universal Tuner via the Radio Interface Box (RIB) or the cable with internal RIB. This interface connects to the microphone connector via control head connector (J0401-8) and to the accessory connector J0501-17 and comprises BUS+.

  • Page 62: Normal Microprocessor Operation

    Chapter 3: 1-8 Controller Circuits 1.12 Normal Microprocessor Operation For this radio, the µP is configured to operate in one of two modes, expanded and bootstrap. In expanded mode the µP uses external memory devices to operate, whereas in bootstrap operation the µP uses only its internal memory.

  • Page 63: Flash Electronically Erasable Programmable Memory (Flash Eeprom)

    Controller Circuits Chapter 3: 1-9 There are 8 analog-to-digital converter ports (A/D) on U0101. They are labeled within the device block as PE0-PE7. These lines sense the voltage level ranging from 0 to 5V of the input line and convert that level to a number ranging from 0 to 255 which can be read by the software to take appropriate action.

  • Page 64: Static Random Access Memory (Sram)

    Chapter 3: 1-10 Controller Board Audio and Signaling Circuits 1.15 Static Random Access Memory (SRAM) The SRAM (U0121) contains temporary radio calculations or parameters that can change very frequently, and which are generated and stored by the software during its normal operation. The information is lost when the radio is turned off.

  • Page 65: Transmit Audio Circuits

    Controller Board Audio and Signaling Circuits Chapter 3: 1-11 Transmit Audio Circuits Refer to Figure 3-3 for reference for the following sections. J0551 J0451 FLAT 31 IN/OUT TX RTN OPTION BOARD EXPANSION BOARD J0401 TX SND TX RTN TP0221 CONTROL HEAD FILTERS AND CONNECTOR PREEMPHASIS...
  • Page 66 Chapter 3: 1-12 Controller Board Audio and Signaling Circuits R0204 and C0202 provide a 560 ohm AC path to ground that sets the input impedance for the microphone and determines the gain based on the emitter resistor in the microphone’s amplifier circuit.

  • Page 67: Transmit Signaling Circuits

    Controller Board Audio and Signaling Circuits Chapter 3: 1-13 channel and emerges from the ASFIC CMP at U0221-40, at which point it is routed to the RF section. 2.2.3 TX Secure Audio (Optional) The audio follows the normal transmit audio processing until it emerges from the ASFIC CMP TX SND pin (U0221-44), which is fed to the Secure board residing at option connector J0551-33.
  • Page 68 Chapter 3: 1-14 Controller Board Audio and Signaling Circuits 2.3.1 Sub-audible Data (PL/DPL) Sub-audible data implies signaling whose bandwidth is below 300Hz. PL and DPL waveforms are used for conventional operation and connect tones for trunked voice channel operation. The trunking connect tone is simply a PL tone at a higher deviation level than PL in a conventional system.

  • Page 69: Receive Audio Circuits

    Controller Board Audio and Signaling Circuits Chapter 3: 1-15 Receive Audio Circuits Refer to Figure 3-5 for reference for the following sections. ACCESSORY CONNECTOR FLT/FLAT RX AUDIO J0501 AUDIO SPKR + EXTERNAL SPKR - U0271 SPEAKER SPKR+ SPKR- CONTROLHEAD CONNECTOR INTERNAL SPEAKER J0401...
  • Page 70 Chapter 3: 1-16 Controller Board Audio and Signaling Circuits SQ DET is used to determine all audio mute / unmute decisions except for Conventional Scan. In this case CH ACT is a pre-indicator as it occurs slightly faster than SQ DET. 2.4.2 Audio Processing and Digital Volume Control The receiver audio signal enters the controller section from the IF IC on DISC AUDIO.
  • Page 71 Controller Board Audio and Signaling Circuits Chapter 3: 1-17 If the voltage is between 3.3 and 6.4V, the device will be active but has its input (U0273-1/9) off. This is a mute condition which is used to prevent an audio pop when the PA is enabled. The SPK+ and SPK- outputs of the audio PA have a DC bias which varies proportionately with FLT A+ (U0271-7).

  • Page 72: Receive Signaling Circuits

    Chapter 3: 1-18 Controller Board Audio and Signaling Circuits Receive Signaling Circuits Refer to Figure 3-6 for reference for the following sections. DATA FILTER HSIO LIMITER AND DEEMPHASIS MICRO CONTROLLER DISC DET AUDIO ASFIC_CMP U0101 DISCRIMINATOR AUDIO U0221 FROM RF SECTION LSIO (IF IC) FILTER...

  • Page 73: Voice Storage (Optional)

    Controller Board Audio and Signaling Circuits Chapter 3: 1-19 The output of the generator is summed into the audio chain just after the RX audio de-emphasis block. Inside U0221 the tone is amplified and filtered, then passed through the 8-bit digital volume attenuator, which is typically loaded with a special value for alert tone audio.
  • Page 74 Chapter 3: 1-20 Controller Board Audio and Signaling Circuits Notes 6881091C63-A...

  • Page 75: Troubleshooting Charts

    Chapter 3: 2-1 Section 2 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Controller Controller Check Press PTT. No RF Output Before replacing Power. Power Up Not able to MCU, check SPI Alert Tone program Audio AUDIO clock, SPI data, J0501 RF Board ICs at Audio PA and RF IC select Audio at Pin...
  • Page 76 Chapter 3: 2-2 Troubleshooting Flow Chart for Controller Notes 6881091C63-A...

  • Page 77: Controller Schematics And Parts Lists

    Chapter 3: 3-1 Section 3 CONTROLLER SCHEMATICS AND PARTS LISTS Allocation of Schematics and Circuit Boards Controller Circuits This chapter shows the schematics and the parts lists for the controller circuits. Voice Storage Facility The Voice Storage facility is an orderable option on all CDM and PRO models except the PassPort model (CDM1550•LS+), on which Voice Storage is a standard feature.
  • Page 78 Chapter 3: 3-2 Allocation of Schematics and Circuit Boards Table 3-3 Controller T6/T7/T9 Diagrams and Parts Lists Controller T6/T7/T9 used on PCB: T6/7 on 8486206B06 LB1, 40-60W T6/7 on 8486207B05 LB2, 40-60W T6/7 on 8486140B12 VHF, 25-45W T6/7 on 8480643Z06 UHF B1, 25-40W T6/7 on 8480645Z04 UHF B2, 25-40W T7 on 8486172B07 VHF, 1-25W T7 on 8485670Z02 UHF B1, 1-25W...

  • Page 79: Controller T2 Schematics And Parts Lists

    Controller T2 Schematics and Parts Lists Chapter 3: 3-3 Controller T2 Schematics and Parts Lists OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) IN_5V_RF_REG VS_MIC FLT_A+ PASUPVLTG INT_SWB+ CONTROLLER AUDIO EXT_SWB+ EXP_BD_REQ BOOT_CNTRL 5V_RF EMERGENCY_CONTROL SCI_TX SUPPLY_VOLTAGE RESET IGNITION_CONTROL...
  • Page 80 Chapter 3: 3-4 Controller T2 Schematics and Parts Lists J0601-1 PASUPVLTG J0601-2 J0601-3 VR0601 U0611 C0601 470pF LM2941 VOUT EXT_SWB+ ON_OFF R0611 C0603 C0611 C0612 22uF 10uF GND1 GND2 0.1uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 5VDC VSTBY C0621 C0622 470pF 47uF...
  • Page 81 Controller T2 Schematics and Parts Lists Chapter 3: 3-5 R0201 C0211 R0211 0.1uF 7.5K R0202 R0204 4.6VDC C0201 C0212 R0212 10uF TP0221 10uF U0211-4 7.5K 80mV RMS MC3403 MC3403 R0205 C0204 INT_MIC R0207 0.1uF C0203 VS_MIC 2.2K 2200pF 80mV RMS R0206 R0208 C0205...
  • Page 82 Chapter 3: 3-6 Controller T2 Schematics and Parts Lists J0451 J0401 CONTROL HEAD EXPANSION BOARD 12-PIN CONNECTOR 18-PIN CONNECTOR R0401 UART_RX J0451-1 UART_RX SCI_TX J0401-1 SCI_TX UART_TX J0451-2 UART_TX SPEAKER+ J0401-2 SPKR+ J0451-3 SPEAKER- J0401-3 SPKR- J0451-4 GROUND J0401-4 GROUND OPT_PTT J0451-5 OPT_PTT...
  • Page 83 Controller T2 Schematics and Parts Lists Chapter 3: 3-7 5VDC (0VDC during boot mode) R0101 R0102 TP0151 R0151 4.7K D0151 BUS+ BOOT_CNTRL VSTBY D0101 Q0151 VR0151 R0115 R0152 R0116 5.6V GPIO(0:13) FLT_A+ FLT_A+ R0172 ON_OFF_CONTROL R0171 SCI_TX C0151 .01uF 4.7K TP0101 TP0102 GP1_IN...
  • Page 84 Chapter 3: 3-8 Controller T2 Schematics and Parts Lists Controller T2 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C0271 2113741F49 .01uF C0491 2113743L09 470pF C0652 2311049A97 33uF Part No.
  • Page 85 0662057A82 R0671 0662057A84 R0175 0662057A73 R0275 0662057A73 R0672 0662057A73 R0176 0662057A84 R0276 0662057A77 R0681 0662057A79 * Motorola Depot Servicing only R0177 0662057A65 4.7K R0401 0662057A33 R0682 0662057A93 Reference designators with an asterisk indicate R0178 0662057A89 R0407 0662057M26 U0101 5102226J56 MC68HC11FL0 100 PIN...

  • Page 86: Controller T5 Schematics And Parts Lists

    Chapter 3: 3-10 Controller T5 Schematics and Parts Lists Controller T5 Schematics and Parts Lists OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) IN_5V_RF_REG VS_MIC FLT_A+ CONTROLLER PASUPVLTG P1 0102726B33 INT_SWB+ P2 0102726B67 P3 0102726B71 EXT_SWB+ EXP_BD_REQ P4 0102726B87 BOOT_CNTRL...
  • Page 87 Controller T5 Schematics and Parts Lists Chapter 3: 3-11 J0601-1 PASUPVLTG J0601-2 J0601-3 VR0601 C0601 U0611 470pF LM2941 VOUT EXT_SWB+ ON_OFF C0603 C0612 R0611 C0611 10uF 0.1uF 22uF GND2 GND1 R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 5VDC VSTBY VR0621 C0621 C0622 5.6V...
  • Page 88 Chapter 3: 3-12 Controller T5 Schematics and Parts Lists U0211-4 MC3403 R0201 R0203 R0211 C0211 7.5K 0.1uF R0202 R0204 C0201 C0202 10uF 10uF R0212 C0212 TP0221 7.5K 10uF 80mV RMS R0205 C0204 INT_MIC 0.1uF R0207 C0203 80mV RMS VS_MIC 2.2K 2200pF R0206 EXT_MIC...
  • Page 89 Controller T5 Schematics and Parts Lists Chapter 3: 3-13 J0451 R0441 C0449 C0448 C0447 C0446 C0445 C0443 C0442 C0441 C0427 C0423 C0421 EXPANSION BOARD 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF 82pF 470pF 18-PIN CONNECTOR J0401 CONTROL HEAD C0426 C0422 R0401...
  • Page 90 Chapter 3: 3-14 Controller T5 Schematics and Parts Lists R0101 R0102 4.7K BUS+ TP0151 5VDC (0VDC during boot mode) R0151 D0101 D0151 FLT_A+ FLT_A+ R0116 R0115 BOOT_CNTRL VSTBY Q0151 VR0151 R0152 SCI_TX 5.6V ON_OFF_CONTROL C0151 TP0101 TP0102 .01uF GPIO(0:13) R0172 10K R0171 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7)
  • Page 91 Controller T5 Schematics and Parts Lists Chapter 3: 3-15 U0351 LP2951ACMM-3.3 INPUT OUTPUT FEEDBACK ERROR C0342 SHUTDOWN SENSE C0351 C0354 C0353 0.1uF C0352 VTAP 0.1uF 0.1uF 33uF .022uF C0324 0.1uF R0323 C0325 D0301 RX_AUD_RTN U0341-1 0.1uF LM2904 R0324 U0331-2 C0331 PWR_GND 0.1uF C0303...
  • Page 92 Chapter 3: 3-16 Controller T5 Schematics and Parts Lists Controller T5 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C0302 2113743E20 100nF 16V C0478 2113743L09 470 pF 10%...
  • Page 93 Voice storage only R0182 0662057A89 47k 1/16W 5% R0671 0662057A84 30k 1/16W 5% R0342 0662057A55 1800 1/16W 5% * Motorola Depot Servicing only R0183 0662057A65 4700 1/16W 5% R0672 0662057A73 10k 1/16W 5% Voice storage only R0184 0662057A89 47k 1/16W 5%...

  • Page 94: Controller T6/T7/T9 Schematics And Parts Lists

    Chapter 3: 3-18 Controller T6/T7/T9 Schematics and Parts Lists Controller T6/T7/T9 Schematics and Parts Lists OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) P1 0102726B32 T2 0102727B24 MPT P2 0102726B66 T2 0102727B25 SELV/MDC P3 0102726B70 T3 0102727B40 MPT P4 0102726B86 T3 0102727B41 SELV/MDC P5 0102726B94...
  • Page 95 Controller T6/T7/T9 Schematics and Parts Lists Chapter 3: 3-19 J0601-1 PASUPVLTG J0601-2 J0601-3 C0601 VR0601 U0611 470pF LM2941 VOUT EXT_SWB+ ON_OFF C0603 R0611 10uF GND1 C0611 C0612 22uF 0.1uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 5VDC VSTBY C0621 VR0621 C0622 470pF 5.6V...
  • Page 96 Chapter 3: 3-20 Controller T6/T7/T9 Schematics and Parts Lists C0256 R0211 C0211 R0203 R0201 0.1uF 7.5K R0202 R0204 100pF R0256 5V_RF 100K C0201 C0202 R0212 10uF C0212 10uF 7.5K TP0221 10uF R0254 80mV RMS R0205 C0204 INT_MIC FLAT_TX_RTN R0207 0.1uF C0203 U0211-4 VS_MIC...
  • Page 97 Controller T6/T7/T9 Schematics and Parts Lists Chapter 3: 3-21 C0449 C0448 C0447 C0446 C0445 C0443 C0442 C0441 C0459 C0458 C0457 C0456 C0455 C0453 C0452 C0451 J0451 C0421 R0441 C0407 C0406 C0403 C0402 C0401 C0427 C0426 C0423 C0422 J0401 EXPANSION BOARD 470pF 470pF 470pF...
  • Page 98 Chapter 3: 3-22 Controller T6/T7/T9 Schematics and Parts Lists R0441 J0451 C0421 EXPANSION BOARD C0443 C0449 C0448 C0447 C0446 C0445 C0442 C0441 82pF 18-PIN CONNECTOR 470pF J0401 470pF 470pF 470pF 470pF 470pF 470pF 470pF R0442 1K CONTROL HEAD C0427 C0426 C0423 C0422 R0401...
  • Page 99 Controller T6/T7/T9 Schematics and Parts Lists Chapter 3: 3-23 R0441 J0451 C0421 EXPANSION BOARD C0443 C0449 C0448 C0447 C0446 C0445 C0442 C0441 82pF 18-PIN CONNECTOR 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF J0401 R0442 1K CONTROL HEAD C0427 C0426 C0423 C0422 R0401...
  • Page 100 Chapter 3: 3-24 Controller T6/T7/T9 Schematics and Parts Lists R0101 R0102 4.7K BUS+ TP0151 R0151 D0151 FLT_A+ FLT_A+ R0116 R0115 D0101 BOOT_CNTRL VSTBY Q0151 SCI_TX R0152 VR0151 ON_OFF_CONTROL TP0101 TP0102 C0151 GPIO(0:13) .01uF R0172 R0171 4.7K CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) GP1_IN CNTLR_AUDIO(0:7) GP1_IN_ACC3 Q0171 R0173...
  • Page 101 Controller T6/T7/T9 Schematics and Parts Lists Chapter 3: 3-25 R0101 R0102 4.7K BUS+ 5VDC (0VDC during boot mode) TP0151 R0151 D0101 D0151 FLT_A+ FLT_A+ R0116 R0115 BOOT_CNTRL Q0151 VSTBY VR0151 SCI_TX R0152 5.6V ON_OFF_CONTROL C0151 TP0101 TP0102 .01uF GPIO(0:13) R0172 R0171 4.7K CNTLR_AUDIO(0:7)
  • Page 102 Chapter 3: 3-26 Controller T6/T7/T9 Schematics and Parts Lists U0351 LP2951ACMM-3.3 OUTPUT INPUT ERROR FEEDBACK SENSE SHUTDOWN C0351 VTAP 0.1uF C0352 C0354 C0353 0.1uF .022uF 33uF C0342 0.1uF C0324 U0331-2 0.1uF R0323 C0325 D0301 RX_AUD_RTN U0341-1 C0331 PWR_GND 0.1uF 0.1uF R0324 LM2904 C0301...
  • Page 103 Controller T6/T7/T9 Schematics and Parts Lists Chapter 3: 3-27 Controller T6/7 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C0293 2311049C01 10uF (only Low Band) C0477 2113743L09 470 pF 10%...
  • Page 104 Voice storage only R0662 0662057B02 150k 1/16W R0203 0662057A25 100 1/16W 5% R0343 0662057B47 0 1/16W * Motorola Depot Servicing only R0671 0662057A84 30k 1/16W 5% R0204 0662057A43 560 1/16W 5% Voice storage only Reference designators with an asterisk indicate R0205...
  • Page 105 Controller T6/T7/T9 Schematics and Parts Lists Chapter 3: 3-29 Controller T9 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C0290 2311049C01 10uF (only Low Band) C0470 2113743L09 470 pF 10%...
  • Page 106 R0344 0662057A91 56K 1/16W 5% R0205 0662057A73 10k 1/16W 5% R0671 0662057A84 30k 1/16W 5% * Motorola Depot Servicing only Voice storage only R0206 0662057A73 10k 1/16W 5% R0672 0662057A73 10k 1/16W 5% Reference designators with an asterisk indicate R0345...
  • Page 107 Controller T11 Schematics and Parts Lists Chapter 3: 3-31 Controller T11 Schematics and Parts Lists J0601-1 PASUPVLTG J0601-2 J0601-3 VR0601 C0601 U0611 470pF LM2941 VOUT EXT_SWB+ ON_OFF C0611 C0612 C0603 R0611 10uF 22uF 0.1uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 VSTBY VR0621...
  • Page 108 Chapter 3: 3-32 Controller T11 Schematics and Parts Lists R0201 R0203 C0211 R0211 0.1uF C0256 7.5K R0204 R0202 100pF R0256 C0202 C0201 5V_RF 10uF C0212 10uF R0212 100K TP0221 10uF 7.5K FLAT_TX_RTN R0254 C0204 R0205 INT_MIC C0203 0.1uF R0207 Check PIN Values on IC U0211-4 2.2K 2200pF...
  • Page 109 Controller T11 Schematics and Parts Lists Chapter 3: 3-33 RSSI RSSI J0451 R0441 CH_ACT CH_ACT J0401 EXPANSION BOARD C0449 C0448 C0447 C0446 C0445 C0443 C0442 C0441 18-PIN CONNECTOR 470pF 470pF 470pF 470pF 470pF 470pF 470pF 470pF R0442 CONTROL HEAD C0427 C0426 C0423 C0422...
  • Page 110 Chapter 3: 3-34 Controller T11 Schematics and Parts Lists R0101 R0102 4.7K BUS+ TP0151 R0151 D0151 FLT_A+ FLT_A+ R0116 R0115 D0101 BOOT_CNTRL R0152 VSTBY Q0151 SCI_TX VR0151 ON_OFF_CONTROL C0151 TP0101 TP0102 GPIO(0:13) .01uF R0172 R0171 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) GP1_IN 4.7K Q0171 GP1_IN_ACC3...
  • Page 111 Controller T11 Schematics and Parts Lists Chapter 3: 3-35 Controller T11 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C0275 2311049A99 CAP, 47uF C0496 2113743L09 CAP, 470pF D0179...
  • Page 112 Chapter 3: 3-36 Controller T11 Schematics and Parts Lists * Motorola Depot Servicing only Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Reference designators with an asterisk indicate Part No. Part No. Part No. components which are not field-replaceable...
  • Page 113 Controller T12 Schematics and Parts Lists Chapter 3: 3-37 Controller T12 Schematics and Parts Lists OPT_PTT OPT_PTT BUS+ BUS+ RESET RESET CNTRL_AUDIO(0:7) CNTRL_AUDIO(0:7) GPIO(0:13) GPIO(0:13) SPI(0:10) SPI(0:10) P1 0102726B32 P7 0102727B16 SELV/MDC P2 0102726B66 T2 0102727B24 MPT P3 0102726B70 T2 0102727B25 SELV/MDC IN_5V_RF_REG T3 0102727B40 MPT AUDIO...
  • Page 114 Chapter 3: 3-38 Controller T12 Schematics and Parts Lists J0601-1 PASUPVLTG J0601-2 J0601-3 U0611 VR0601 C0601 LM2941 470pF VOUT EXT_SWB+ ON_OFF R0611 C0611 C0612 C0603 GND1 GND2 0.1uF 22uF 10uF R0612 4.7K E0631 57R01 FLT_A+ D0621 R0621 VSTBY C0621 C0622 VR0621 470pF 47uF...
  • Page 115 Controller T12 Schematics and Parts Lists Chapter 3: 3-39 C0256 R0211 C0211 R0201 R0203 0.1uF 7.5K 100pF R0202 R0204 R0256 C0201 C0202 100K 10uF 10uF 5V_RF R0212 C0212 TP0221 7.5K 10uF 80mV RMS R0254 R0205 C0204 INT_MIC FLAT_TX_RTN 0.1uF C0203 R0207 VS_MIC 2200pF...
  • Page 116 Chapter 3: 3-40 Controller T12 Schematics and Parts Lists J0451 R0441 C0449 EXPANSION BOARD 470pF J0401 C0421 C0448 C0446 C0445 C0443 C0442 C0441 C0447 R0442 CONTROL HEAD 82pF 18-PIN CONNECTOR 470pF 470pF 470pF 470pF C0427 C0426 C0423 C0422 470pF 470pF 470pF R0401 12-PIN CONNECTOR...
  • Page 117 Controller T12 Schematics and Parts Lists Chapter 3: 3-41 R0102 R0101 4.7K BUS+ TP0151 R0151 D0101 D0151 FLT_A+ FLT_A+ R0116 R0115 BOOT_CNTRL VSTBY VR0151 Q0151 SCI_TX 5.6V R0152 ON_OFF_CONTROL GPIO(0:13) R0172 C0151 TP0101 TP0102 .01uF R0171 CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) CNTLR_AUDIO(0:7) Q0171 CNTLR_AUDIO(0:7) GP1_IN 4.7K...
  • Page 118 Chapter 3: 3-42 Controller T12 Schematics and Parts Lists Controller T12 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C0301 2311049A07 1uF 10% 16V C0484 2113741F17 CAP CHIP CL2 X7R REEL 470...
  • Page 119 CHIP RES 10 OHMS 5% R0182 0662057A89 CHIP RES 47K OHMS 5% Voice storage only R0652 0662057A01 CHIP RES 10 OHMS 5% * Motorola Depot Servicing only R0183 0662057A65 CHIP RES 4700 OHMS 5% R0343 0662057B47 0 1/16W R0661 0662057A49...
  • Page 120 Chapter 3: 3-44 Controller T12 Schematics and Parts Lists Notes 6881091C63-A...
  • Page 121 Service Information Table of Contents Section 1 Model Charts and Technical Specifications 1.0 VHF (136-174 MHz) 1-25W Model Charts............4:1-1 1.1 CDM Series Model Chart ................4:1-1 1.2 PRO Series Model Chart................4:1-2 2.0 Technical Specifications ...................4:1-2 Section 2 Theory of Operation 1.0 Introduction .......................4:2-1 2.0 VHF (136-174 MHz) 1-25W Receiver Front-End..........4:2-1...
  • Page 122 Chapter 4: ii Section 4 VHF (136-174 MHz) 1-25W PCBs, Schematics, and Parts Lists 1.0 Allocation of Schematics and Circuit Boards ........... 4:4-1 1.1 Controller Circuits ..................4:4-1 2.0 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists........................4:4-3 3.0 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists........................

  • Page 123: Model Charts And Technical Specifications

    Chapter 4: 1-1 Section 1 MODEL CHARTS AND TECHNICAL SPECIFICATIONS VHF (136-174 MHz) 1-25W Model Charts CDM Series Model Chart CDM Series, VHF (136-174 MHz) 1-25W Model Description AAM25KHC9AA1AN CDM750, 136-174 MHz, 1-25W, 12.5/20/25 kHz AAM25KHD9AA2AN CDM1250, 136-174 MHz, 1-25W, 12.5/20/25 kHz AAM25KHF9AA5AN CDM1550, 136-174 MHz, 1-25W, 12.5/20/25 kHz...

  • Page 124: Pro Series Model Chart

    Chapter 4: 1-2 Technical Specifications PRO Series Model Chart PRO Series, VHF (136-174 MHz) 1-25W Model Description LAM25KHC9AA1AN PRO3100, 136-174 MHz, 1-25W, 12.5/20/25 kHz Ch Sp LAM25KHD9AA2AN PRO5100, 136-174 MHz, 1-25W, 12.5/20/25 kHz Ch Sp LAM25KHF9AA5AN PRO7100, 136-174 MHz, 1-25W, 12.5/20/25 kHz Ch Sp Item Description GCN6112...
  • Page 125 Technical Specifications Chapter 4: 1-3 Transmitter *Frequencies - Full Bandsplit VHF 136-174 MHz Channel Spacing 12.5/20/25 kHz Frequency Stability ±2.0 ppm (-30°C to +60°C, +25° Ref.) Power 1-25W Modulation Limiting ±2.5 @ 12.5 kHz ±4.0 @ 20 kHz ±5.0 @ 25 kHz FM Hum &...
  • Page 126 Chapter 4: 1-4 Technical Specifications Notes 6881091C63-A...

  • Page 127: Theory Of Operation

    Chapter 4: 2-1 Section 2 THEORY OF OPERATION Introduction This chapter provides a detailed theory of operation for the VHF circuits in the radio. For details of the theory of operation and troubleshooting for the associated controller circuits refer to the controller section of this manual.

  • Page 128: Front-End Bandpass Filters And Pre-Amplifier

    Chapter 4: 2-2 VHF (136-174 MHz) 1-25W Receiver Front-End There are two 2-pole 44.85 MHz crystal filters in the high-IF section and 2 pairs of 455 kHz ceramic filters in the low-IF section to provide the required adjacent channel selectivity. The correct pair of ceramic filters for 12.5 or 25kHz channel spacing is selected via control line BWSELECT.

  • Page 129: Vhf (136-174 Mhz) 1-25W Transmitter Power Amplifier (Pa) 25W

    VHF (136-174 MHz) 1-25W Transmitter Power Amplifier (PA) 25W Chapter 4: 2-3 for 20/25 kHz channel spacing or FL3111, FL3113/F3115 for 12.5 kHz channel spacing. These pairs are selectable via BWSELECT. The filtered output from the ceramic filters is applied to the limiter input pin of the IF IC (pin 14).

  • Page 130: Power Controlled Driver Stage

    Chapter 4: 2-4 VHF (136-174 MHz) 1-25W Transmitter Power Amplifier (PA) overall gain of U3401 and therefore its output drive level to Q3421, which in turn controls the output power of the PA. Op-amp U3402-1 monitors the drain current of U3401 via resistor R3444 and adjusts the bias voltage of U3401 so that the current remains constant.

  • Page 131: Antenna Switch

    VHF (136-174 MHz) 1-25W Frequency Synthesis Chapter 4: 2-5 Antenna Switch The antenna switch consists of two PIN diodes, D3471 and D3472. In the receive mode, both diodes are off. Signals applied at the antenna jack J3401 are routed, via the harmonic filter, through network L3472, C3474 and C3475, to the receiver input.

  • Page 132: Reference Oscillator

    Chapter 4: 2-6 VHF (136-174 MHz) 1-25W Frequency Synthesis Reference Oscillator The reference oscillator (Y3263) contains a temperature compensated crystal oscillator with a frequency of 16.8 MHz. An analog-to-digital (A/D) converter internal to U3201 (LVFRAC-N) and controlled by the µP via serial interface (SRL) sets the voltage at the warp output of U3201 (pin 25) to set the frequency of the oscillator.

  • Page 133: Voltage Controlled Oscillator (Vco)

    VHF (136-174 MHz) 1-25W Frequency Synthesis Chapter 4: 2-7 circuitry (D3201, C3202, C3203). This voltage multiplier is basically a diode capacitor network driven by two (1.05MHz) 180 degrees out of phase signals (U3201-14 and -15). Output LOCK (U3201-4) provides information about the lock status of the synthesizer loop. A high level at this output indicates a stable loop.

  • Page 134: Synthesizer Operation

    Chapter 4: 2-8 VHF (136-174 MHz) 1-25W Frequency Synthesis A steering line voltage (VCTRL) between 2.5V and 11V at varactor diode D3361 will tune the full TX frequency range (TXINJ) from 136 MHz to 174 MHz, and at varactor diode D3341 will tune the full RX frequency range (RXINJ) from 181 MHz to 219 MHz.

  • Page 135: Troubleshooting Charts

    Chapter 4: 3-1 Section 3 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) START Bad SINAD Bad 20dB Quieting No Recovered Audio Check Controller Audio at (in the case of no audio) pin 8 of OR ELSE go to “B” U3101? Spray or inject 44.85MHz into XTAL Filter FL3101...
  • Page 136 Chapter 4: 3-2 Troubleshooting Flow Chart for Receiver Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) Inject RF into J3401 Trace IF signal from C3035 to Q3101. IF Signal at Check for bad XTAL IF signal at Q3102 C3035? filter collector? Before replacing...

  • Page 137: Troubleshooting Flow Chart For 25W Transmitter

    Troubleshooting Flow Chart for 25W Transmitter Chapter 4: 3-3 Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) START No power or low power when keyed Check if Pressure Pad closes S3440 Check Components between Current Q3441 and RF Output, >500mA &...
  • Page 138 Chapter 4: 3-4 Troubleshooting Flow Chart for 25W Transmitter Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3) Check PA Stages No power or low power when keyed DC Voltage If U3201 Pin 2 is high, at U3501 replace PCIC Pin 23 =0? Check Resistive Net- >6...
  • Page 139 Troubleshooting Flow Chart for 25W Transmitter Chapter 4: 3-5 Troubleshooting Flow Chart for 25W Transmitter (Sheet 3 of 3 Check Final PA Stage Supply Voltage Bias 2 DC Voltage at Replace Q3441 TP3406? 1-4V Check Components ASFIC RF Voltage between ASFIC and U0221 Pin 6 Check FGU (U3301) at TP3401...

  • Page 140: Troubleshooting Flow Chart For Synthesizer

    Chapter 4: 3-6 Troubleshooting Flow Chart for Synthesizer Troubleshooting Flow Chart for Synthesizer 5V at Check 5V U3201 pins 5, Start Regulator 20, 34 & 36 U3211, R3211 Visual Correct check of the Problem Board OK? Is 16.8MHz 16.8MHz Replace Signal at signal at U3201...

  • Page 141: Troubleshooting Flow Chart For Vco

    Troubleshooting Flow Chart for VCO Chapter 4: 3-7 Troubleshooting Flow Chart for VCO Low or no RF Signal Low or no RF Signal TX VCO RX VCO at input to PA at TP3001 Visual check Visual check Correct of board of board Problem Make sure U3211 is working...
  • Page 142 Chapter 4: 3-8 Troubleshooting Flow Chart for VCO Notes 6881091C63-A...

  • Page 143: Vhf (136-174 Mhz) 1-25W Pcbs, Schematics, And

    Chapter 4: 4-1 Section 4 VHF (136-174 MHZ) 1-25W PCBS, SCHEMATICS, AND PARTS LISTS Allocation of Schematics and Circuit Boards Controller Circuits The VHF circuits are contained on the printed circuit board (PCB) which also contains the controller circuits. This chapter shows the schematics for the VHF circuits only. Refer to the controller section for details of the related controller circuits.
  • Page 144 Chapter 4: 4-2 Allocation of Schematics and Circuit Boards Table 4-3 VHF 1-25W PCB 8486172B07 Diagrams and Parts Lists PCB 8486172B07: Page: Main Board Top Side 4: 4-23 Main Board Bottom Side 4: 4-24 SCHEMATICS Power Amplifier 1 - 25W 4: 4-15 FRACN Synthesizer 4: 4-25...

  • Page 145: Vhf (136-174 Mhz) 1-25W Pcb 8486172B04, Schematics, And Parts Lists

    VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists Chapter 4: 4-3 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists R3242 J0451 C3209 D3221 Q3221 R3221 C0251 C3221 C0267 C3210 C3222 R3224 R3222 R3223 R0267 L3201 L3232 C3226 C3231 C3213...
  • Page 146 Chapter 4: 4-4 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists C3152 D3261 C0205 C3146 R3146 TP3202 R0208 C3263 C 3203 R 3201 TP3201 C3147 R3203 J0401 R3152 C3261 C3202 C3241 R0265 R3155 R3204 R0266 C0265 C3151 R3147 R3261 D3201 C0492...
  • Page 147 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists Chapter 4: 4-5 L3402 PASUPVLTG_VHF_PA_1 PASUPVLTG 57R01 C3436 C3437 C3405 C3406 10uF .033uF L3436 470pF 470pF 57R01 L3421 9V3_VHF_PA_1 9V3FLT 57R01 C3421 .033uF U_PREDRIVER U_DRIVER C3438 C3439 C3493 C3495 C3403 470pF 470pF 6.8pF...
  • Page 148 Chapter 4: 4-6 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists R3211 VDDA_VHF_FN_1 VDDA C3212 C3214 2.2uF .018uF VDDA U3211 LP2951 5V_VHF_FN_1 5V_VHF_FN_2 IN_5V_RF_REG_VHF_FN_1 4.97VDC (SOURCE) OUTPUT INPUT IN_5V_RF_REG FEEDBACK 7 13.30VDC ERROR C3213 6.83VDC SENSE SHUTDOWN 2.2uF 5V_TAP C3211 11.28VDC...
  • Page 149 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists Chapter 4: 4-7 Q3303 9.14VDC (R) UMC5N 9V3_VHF_VCO_3 9V3_VHF_VCO_2 9V3_VHF_VCO_1 0VDC (T) 9.12VDC VDDA_VHF_VCO_1 3.83VDC (R) 4.97VDC VDDA 0VDC (T) 4.54VDC VSF_VHF_VCO_1 7.44VDC (R) L3333 R3311 0VDC (T) C3335 .01uF R3331 R3335 C3337...
  • Page 150 Chapter 4: 4-8 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists Q3021 R3006 FECNTL_2_VHF_FE_1 4.7K C3027 FECNTL_2 0.1uF C3026 C3029 0.1uF 330pF R3010 R3025 IF_VHF_FE_1 9V3_VHF_FE_1 R3002 L3031 270nH R3011 9V3_VHF_FE_2 4.7K C3010 C3028 C3000 C3035 C3011 C3007 0.1uF R3031 330pF...
  • Page 151 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists Chapter 4: 4-9 FL3115 CFWC455F MC74HC4066 FL3113 FL3111 CFUCJ455F CFWC455G CNTL 9V3_VHF_IF_1 CNTL CNTL CNTL R3153 9V3_VHF_IF_2 U3115-1 U3111-1 U3111-4 U3115-4 Q3151 MC74HC4066 MC74HC4066 MC74HC4066 MC74HC4066 R3151 BWSELECT_VHF_IF_1 R3104 BWSELECT R3114 FL3114 FL3112...
  • Page 152 Chapter 4: 4-10 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists † VHF 1-25W PCB 8486172B04 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C3140 2113743E20...
  • Page 153 VHF (136-174 MHz) 1-25W PCB 8486172B04, Schematics, and Parts Lists Chapter 4: 4-11 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. D3101 4880154K03 DUAL SCHOTTKY SOT23 L3363 2462587N50...
  • Page 154 R3443 0662057A87 39k 1/16W 5% R3444 0662057C19 4.7 1/10W 5% R3445 0662057A58 2400 1/16W 5% * Motorola Depot Servicing only R3446 0662057B47 0 1/16W Reference designators with an asterisk indicate R3452 0662057A65 4700 1/16W 5% components which are not field-replaceable...

  • Page 155: Vhf (136-174 Mhz) 1-25W Pcb 8486172B06, Schematics, And Parts Lists

    VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists Chapter 4: 4-13 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists C3240 R3242 R3221 C0251 J0451 C3210 R3224 C0267 C0211 L3201 C3226 R0267 C0212 R0252 R3223 FL3114 Y3102 C3213 L3232 C3255...
  • Page 156 Chapter 4: 4-14 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists TP3202 C3203 C3241 R0208 J0401 R3201 TP3201 R3152 R3203 R0265 C0492 R3204 D3201 C0265 C0254 D3261 R3261 R3147 C0202 C0497 FL3115 R0206 Q3152 C0491 C3144 U0652 R0203 C0266 R3206 TP0222...
  • Page 157 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists Chapter 4: 4-15 L3402 PASUPVLTG_VHF_PA_1 PASUPVLTG 57R01 C3436 C3437 C3405 C3406 L3436 .033uF 470pF 10uF 470pF 57R01 L3421 9V3_VHF_PA_1 9V3FLT 57R01 C3421 .033uF C3493 C3495 U_PREDRIVER U_DRIVER 6.8pF C3438 3.3pF C3439 C3403 R3491...
  • Page 158 Chapter 4: 4-16 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists VDDA_VHF_FN_1 R3211 VDDA C3214 2.2uF U3211 ADP3300 VDDA 5V_VHF_FN_1 IN_5V_RF_REG_VHF_FN_1 4.97VDC (SOURCE) IN_5V_RF_REG 13.30VDC 5V_VHF_FN_2 C3213 6.83VDC 2.2uF 11.28VDC L3201 C3211 C3215 C3202 390nH 0.1uF 2.2uF .01uF R3201 C3203 VCOBIAS_1_VHF_FN_1...
  • Page 159 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists Chapter 4: 4-17 WARISMOBILE VHF_VCO Q3303 UMC5N 9.14VDC (R) 9V3_VHF_VCO_3 9V3_VHF_VCO_1 0VDC (T) 9.21VDC 9V3_VHF_VCO_2 VDDA_VHF_VCO_1 3.83VDC (R) 4.97VDC VDDA 0VDC (T) 4.54VDC L3333 VSF_VHF_VCO_1 7.44VDC (R) R3311 0VDC (T) C3335 .01uF R3335...
  • Page 160 Chapter 4: 4-18 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists R3026 Q3021 R3027 FECNTL_2_VHF_FE_1 R3006 FECNTL_2 R3010 C3029 C3026 330pF 0.1uF R3002 9V3_VHF_FE_1 R3025 1.5K 9V3_VHF_FE_2 IF_VHF_FE_1 L3031 C3007 C3000 C3010 R3011 C3011 3300pF 330pF 3300pF 3300pF 4.7K 560nH C3028...
  • Page 161 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists Chapter 4: 4-19 FL3115 9180469V04 9V3_VHF_IF_1 U3111-1 FL3111 FL3113 9180469V03 9180468v04 9V3_VHF_IF_2 R3104 CNTL CNTL CNTL CNTL R3114 R3153 U3111-4 U3115-1 U3115-4 5V_VHF_IF_1 R3105 R3115 R3151 3.9VDC U3115-3 U3111-2 U3111-3 U3115-2 C3111 FL3112...
  • Page 162 Chapter 4: 4-20 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists † VHF 1-25W PCB 8486172B06 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C3139 2113743E20...
  • Page 163 VHF (136-174 MHz) 1-25W PCB 8486172B06, Schematics, and Parts Lists Chapter 4: 4-21 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. D3101 4880154K03 DIODE DUAL SCHOTTKY L3402 2484657R01...
  • Page 164 39k 1/16W 5% R3442 0662057A57 2200 1/16W 5% R3443 0662057A87 39k 1/16W 5% R3444 0662057C19 4.7 1/10W 5% * Motorola Depot Servicing only R3445 0662057A58 2400 1/16W 5% R3446 0662057B47 0 1/16W Reference designators with an asterisk indicate R3450 0662057A41...

  • Page 165: Vhf (136-174 Mhz) 1-25W Pcb 8486172B07, Schematics, And Parts Lists

    VHF (136-174 MHz) 1-25W PCB 8486172B07, Schematics, and Parts Lists Chapter 4: 4-23 VHF (136-174 MHz) 1-25W PCB 8486172B07, Schematics, and Parts Lists C3240 R3242 C0251 R0257 R3221 J0451 C0256 R3224 C3210 C0211 L3232 C3231 C0212 R0256 Y3102 R0252 C3213 R3223 FL3114 C3255...
  • Page 166 Chapter 4: 4-24 VHF (136-174 MHz) 1-25W PCB 8486172B07, Schematics, and Parts Lists C3241 C3203 R3201 TP3201 J0401 C0267 R3203 R3152 R0267 C0492 C0265 R3204 D3201 C0254 R3261 R3147 R0266 C0202 C0497 FL3115 Q3152 R0203 R0206 C0491 C3144 U0652 R0204 R3206 U3201 TP0222...
  • Page 167 VHF (136-174 MHz) 1-25W PCB 8486172B07, Schematics, and Parts Lists Chapter 4: 4-25 VDDA_VHF_FN_1 R3211 VDDA C3214 2.2uF U3211 ADP3300 VDDA 5V_VHF_FN_1 4.97VDC (SOURCE) IN_5V_RF_REG 13.30VDC 5V_VHF_FN_2 IN_5V_RF_REG_VHF_FN_1 C3213 6.83VDC 2.2uF L3201 C3212 C3211 11.28VDC C3215 390nH .022uF 0.1uF 2.2uF C3202 .01uF R3201...
  • Page 168 Chapter 4: 4-26 VHF (136-174 MHz) 1-25W PCB 8486172B07, Schematics, and Parts Lists FL3115 9180469V04 U3111-1 FL3111 FL3113 9180469V03 9180468v04 1 IN 1 IN CNTL CNTL CNTL CNTL R3153 U3111-4 U3115-1 U3115-4 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 R3114 BWSELECT 9V3_VHF_IF_2 U3115-3 R3104 U3115-2 U3111-2 U3111-3...
  • Page 169 VHF (136-174 MHz) 1-25W PCB 8486172B07, Schematics, and Parts Lists Chapter 4: 4-27 † VHF 1-25W PCB 8486172B07 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C3137 2113743E11...
  • Page 170 Chapter 4: 4-28 VHF (136-174 MHz) 1-25W PCB 8486172B07, Schematics, and Parts Lists Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. D3003 4880154K03 DUAL SCHOTTKY SOT23 L3346 2484562T18...
  • Page 171 16.8MHz 75Z04 R3432 0680194M18 51 1W 5% R3433 0662057C13 2.7 1/10W 5% R3434 0662057C13 2.7 1/10W 5% * Motorola Depot Servicing only R3435 0662057C13 2.7 1/10W 5% R3441 0662057A87 39k 1/16W 5% Reference designators with an asterisk indicate R3442 0662057A57...

  • Page 172: Vhf (136-174 Mhz) 1-25W Pcb 8486172B08, Schematics, And Parts Lists

    Chapter 4: 4-30 VHF (136-174 MHz) 1-25W PCB 8486172B08, Schematics, and Parts Lists VHF (136-174 MHz) 1-25W PCB 8486172B08, Schematics, and Parts Lists R3242 J0451 C0251 R0257 R3221 R3224 C3210 C3226 L3232 C0212 FL3114 C3213 R3223 Y3102 C3227 C3231 C3255 C3212 U3115 U0251...
  • Page 173 VHF (136-174 MHz) 1-25W PCB 8486172B08, Schematics, and Parts Lists Chapter 4: 4-31 TP3202 C3241 R3201 C3152 C3203 C3146 D3261 C3263 C0267 TP3201 C0255 J0401 C3147 R3152 R3146 R3203 D3201 R0267 C0492 C3151 R3204 C0265 R3147 Q3152 R0468 R3261 U0653 C0254 C0202 FL3115...
  • Page 174 Chapter 4: 4-32 VHF (136-174 MHz) 1-25W PCB 8486172B08, Schematics, and Parts Lists L3402 PASUPVLTG_VHF_PA_1 PASUPVLTG 57R01 C3436 C3437 C3405 C3406 L3436 .033uF 10uF 470pF 470pF 57R01 L3421 9V3_VHF_PA_1 9V3FLT 57R01 C3421 .033uF C3493 C3495 U_DRIVER C3439 U_PREDRIVER C3438 6.2pF 3.3pF C3403 R3491...
  • Page 175 VHF (136-174 MHz) 1-25W PCB 8486172B08, Schematics, and Parts Lists Chapter 4: 4-33 FL3115 CFWC455F 9180469V04 U3111-1 CFWC455G CFUCJ455F U3111-4 U3115-1 U3115-4 FL3113 FL3111 9180468v04 9180469V03 CNTL CNTL CNTL CNTL R3153 Q3151 9V3_VHF_IF_1 R3151 BWSELECT_VHF_IF_1 BWSELECT 9V3_VHF_IF_2 R3114 R3104 U3111-3 U3115-2 CFUCJ455D U3111-2...
  • Page 176 Chapter 4: 4-34 VHF (136-174 MHz) 1-25W PCB 8486172B08, Schematics, and Parts Lists † VHF 1-25W PCB 8486172B08 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No. Part No. Part No. Circuit Motorola Description C3141 2113743E20...
  • Page 177 VHF (136-174 MHz) 1-25W PCB 8486172B08, Schematics, and Parts Lists Chapter 4: 4-35 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. FL3114 9180468V06 CER FLTR 4EL 455 KHZ SMD...
  • Page 178 VCTCXO 16.8MHz 2ppm TTSO5V * Y3261 Not Used 16.8MHz 75Z04 * Motorola Depot Servicing only Reference designators with an asterisk indicate components which are not field-replaceable because they need to be calibrated with specialized factory equipment after installation. Radios in which these parts have been replaced in the field will be off frequency at temperature extremes.

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