hit counter script
Motorola VHF2 Service Information
  1. Manuals
  2. Brands
  3. Motorola Manuals
  4. Radio
  5. VHF2
  6. Service information
Motorola VHF2 Service Information

Motorola VHF2 Service Information

Cm radios
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Commercial Series
CM Radios
VHF2 (146-174MHz)
Service Information
Issue: December 2003

Advertisement

Table of Contents
loading

Related Manuals for Motorola VHF2

Summary of Contents for Motorola VHF2

  • Page 1 Commercial Series CM Radios VHF2 (146-174MHz) Service Information Issue: December 2003...
  • Page 2 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...

  • Page 3: Table Of Contents

    Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 CM140/CM340/CM160/CM360 Model Chart ............1-1 2.0 Technical Specifications ..................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 VHF (146-174MHz) Receiver................2-1 2.1 Receiver Front-End ..................2-1 2.2 Receiver Back-End..................2-2 3.0 VHF (146-174MHz) Transmitter Power Amplifier ..........2-2 3.1 First Power Controller Stage................2-2 3.2 Power Controlled Driver Stage ...............2-3 3.3 Final Stage......................2-3...
  • Page 4 VHF PCB/SCHEMATICS/PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards ............4-1 1.1 VHF2 and Controller Circuits................4-1 2.0 VHF2 1-25W PCB 8488977U01 (Rev. C) / Schematics ........4-3 2.1 VHF2 1-25W PCB 8488977U01 (Rev. C) Parts List ........4-19...

  • Page 5: Model Chart And Technical Specifications

    CM160 146-174 MHz 1-25W 64-Ch MDM50KNF9AN2_N CM360 146-174 MHz 1-25W 100-Ch Item Description FUD1183_ S. Tanapa VHF2 25W 8 Ch BNC PMUD1879_ S. Tanapa VHF2 25W 10 Ch BNC PMUD1874_ S. Tanapa VHF2 25W 64 Ch BNC PMUD1881_ S. Tanapa VHF2 25W 100 Ch BNC...

  • Page 6: Technical Specifications

    MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specification VHF2 Frequency Range: 146-174 MHz Frequency Stability ±2 PPM (-30°C to +60°C, 25°C Ref.) Channel Capacity: CM140 - 8 CM340 - 10 CM160 - 64...
  • Page 7 Technical Specifications Transmitter Specification VHF2 Frequency Stability: +/- 2.5ppm Modulation Limiting: ±2.5 kHz @ 12.5 kHz ±4.0 kHz @ 20 kHz ±5.0 kHz @ 20/25 kHz Current Drain Transmit: 7A (25W) FM Hum and Noise: -40 dB@12.5 kHz -45 dB@ 20/25 kHz Conducted/Radiated -36 dBm <...
  • Page 8 MODEL CHART AND TECHNICAL SPECIFICATIONS...

  • Page 9: Theory Of Operation

    Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the VHF circuits in the radio. Details of the theory of operation and trouble shooting for the the associated Controller circuits are included in this Section of the manual.

  • Page 10: Receiver Back-End

    THEORY OF OPERATION Receiver Back End The IF signal from the crystal filter enters the IF amplifier which provides 20 dB of gain and feeds the IF IC at pin 1. The first IF signal at 44.85 MHz mixes with the second local oscillator (LO) at 44.395 MHz to produce the second IF at 455 kHz.

  • Page 11: Power Controlled Driver Stage

    VHF Transmitter Power Amplifier (146-174 MHz) Op-amp U103-3 monitors the drain current of U101 via resistor R122 and adjusts the bias voltage of U101. In receive mode, the DC voltage from RX_EN line turns on Q101, which in turn switches off the biasing voltage to U101.

  • Page 12: Harmonic Filter

    THEORY OF OPERATION Harmonic Filter Inductors L111, L112 and L113 along with capacitors C1011, C1024, C1025, C1022, C1020, C1016, C1017 and C1026 form a low-pass filter to attenuate harmonic energy coming from the transmitter. Resistor R150 along with L126 drains any electrostatic charges that might otherwise build up on the antenna.

  • Page 13: Fractional-N Synthesizer

    VHF (146-174MHz) Frequency Synthesis This oscillator is temperature compensated to an accuracy of +/-2.5 PPM from -30 to 60 degrees C. The temperature compensation scheme is implemented by an algorithm that uses five crystal parameters (four characterize the inverse Bechmann voltage curve and one for frequency accuracy of the reference oscillator at 25 degrees C).

  • Page 14: Voltage Controlled Oscillator (Vco)

    THEORY OF OPERATION Voltage Controlled Oscillator (VCO) The Voltage Controlled Oscillator (VCO) consists of the VCO/Buffer IC (VCOBIC, U201), the TX and RX tank circuits, the external RX amplifier, and the modulation circuitry. AUX3 (U200 Pin 2) U200 Pin 32 Prescaler Out TRB IN Pin 20...

  • Page 15: Synthesizer Operation

    VHF (146-174MHz) Frequency Synthesis Synthesizer Operation The synthesizer consists of a low voltage FRAC-N IC (LVFRAC-N), reference oscillator, charge pump circuits, loop filter circuit, and DC supply. The output signal (PRESC_OUT) of the VCOBIC (U201, pin 12) is fed to the PREIN, pin 32 of U200 via a low pass filter which attenuates harmonics and provides a correct input level to the LVFRAC-N in order to close the synthesizer loop.

  • Page 16: Controller Theory Of Operation

    THEORY OF OPERATION Controller Theory of Operation This section provides a detailed theory of operation for the radio and its components. The main radio is a single-board design, consisting of the transmitter, receiver, and controller circuits. A control head is connected by an extension cable. The control head contains LED indicators, a microphone connector, buttons, and speaker.
  • Page 17 Controller Theory of Operation The DC voltage applied to connector P2 supplies power directly to the following circuitry: Electronic on/off control RF power amplifier 12 volts P-cH FET -U514 9.3 volt regulator Audio PA Ignition Control Head RF_PA Audio_PA Mic Connector Auto Ferrite Bit Keypad...

  • Page 18: Protection Devices

    2-10 THEORY OF OPERATION Voltage regulator U503 provides 5V for the RF circuits. Input and output capacitors are used to reduce the high frequency noise and provide proper operation during battery transients. VSTBY is used only for CM360 5-tone radios. The voltage VSTBY, which is derived directly from the supply voltage by components R5103 and VR502, is used to buffer the internal RAM.

  • Page 19: Microprocessor Clock Synthesiser

    Controller Theory of Operation 2-11 5.3.3 Emergency Mode The emergency switch (P1 pin 9), when engaged, grounds the base of Q506 via EMERGENCY _ACCES_CONN. This switches Q506 to off and consequently resistor R5020 pulls the collector of Q506 and the base of Q506 to levels above 2 volts. Transistor Q502 switches on and pulls U501 pin2 to ground level, thus turning ON the radio.

  • Page 20: Serial Peripheral Interface (Spi)

    2-12 THEORY OF OPERATION Serial Peripheral Interface (SPI) The µP communicates to many of the IC’s through its SPI port. This port consists of SPI TRANSMIT DATA (MOSI) (U403-pin100), SPI RECEIVE DATA (MISO) (U403-pin 99), SPI CLK (U0403-pin1) and chip select lines going to the various IC’s, connected on the SPI PORT (BUS). This BUS is a synchronous bus, in that the timing clock signal CLK is sent while SPI data (SPI TRANSMIT DATA or SPI RECEIVE DATA) is sent.

  • Page 21: Normal Microprocessor Operation

    Controller Theory of Operation 2-13 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 22: Static Random Access Memory

    2-14 THEORY OF OPERATION Static Random Access Memory (SRAM) The SRAM (U402) 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. The device allows an unlimited number of write cycles.

  • Page 23: Transmit Audio Circuits

    Transmit Audio Circuits 2-15 Transmit Audio Circuits 24kOhms TX SND TX RTN U509 CONTROL HEAD FILTERS AND CONNECTOR PREEMPHASIS ASFIC_CMP GCB3 U504 LIMITER HS SUMMER EXT MIC U509 SPLATTER FLAT TX FILTER AUDIO MOD IN ACCESSORY LS SUMMER CONNECTOR SECTION GCB5 (SYNTHESIZER) ATTENUATOR...

  • Page 24: Ptt Sensing And Tx Audio Processing

    2-16 THEORY OF OPERATION 7.1.2 Standard Microphone Hook Pin is shorted to the hook mic inside the standard Mic, If the mic is out off hook, 3.3V is routed to R429 via R458, D401, and it create 0.7V on MIC_SENSE (u.P U403-67) by Voltage Divider R429/R430.

  • Page 25: Transmit Signalling Circuits

    Transmit Signalling Circuits 2-17 Transmit Signalling Circuits SUMMER 5-3-2 STATE HIGH SPEED ENCODER CLOCK IN SPLATTER (HSIO) FILTER DTMF MICRO ENCODER CONTROLLER U403 ASFIC_CMP U504 LOW SPEED ENCODER SUMMER CLOCK IN (LSIO) TO RF ATTENUATOR SECTION MOD IN (SYNTHESIZER) Figure 2-8 Transmit Signalling Path From a hardware point of view, there are 3 types of signaling: Sub-audible data (PL / DPL / Connect Tone) that gets summed with transmit voice or signaling,...

  • Page 26: High Speed Data

    2-18 THEORY OF OPERATION High Speed Data High speed data refers to the 3600 baud data waveforms, known as Inbound Signaling Words (ISWs) used in a trunking system for high speed communication between the central controller and the radio. To generate an ISW, the µP first programs the ASFIC CMP (U504) to the proper filter and gain settings.

  • Page 27: Receive Audio Circuits

    Receive Audio Circuits 2-19 Receive Audio Circuits ACCESSORY CONNECTOR FLT RX AUDIO AUDIO SPKR + EXTERNAL SPKR - U502 SPEAKER SPKR+ SPKR- CONTROL HEAD CONNECTOR MUTE U509 INTERNAL SPEAKER HANDSET AUDIO U505 GCB4 U IO AUDIO URX OUT GCB1 VOLUME AUX RX ASFIC_CMP ATTEN.

  • Page 28: Audio Processing And Digital Volume Control

    2-20 THEORY OF OPERATION Audio Processing and Digital Volume Control The receiver audio signal (DISC AUDIO) enters the controller section from the IF IC where it is.DC coupled to ASFIC CMP via the DISC input U504-pin 2. The signal is then applied to both the audio and the PL/DPL paths The audio path has a programmable amplifier, whose setting is based on the channel bandwidth being received, an LPF filter to remove any frequency components above 3000Hz, and a HPF to...

  • Page 29: Handset Audio

    Receive Signalling Circuits 2-21 Handset Audio Certain handheld accessories have a speaker within them which require a different voltage level than that provided by U502. For these devices HANDSET AUDIO is available at control head connector J2 pin18. The received audio from the output of the ASFIC CMP’s digital volume attenuator is routed to U505 pin 2 where it is amplified.

  • Page 30: Alert Tone Circuits

    2-22 THEORY OF OPERATION The low speed limited data output (PL, DPL, and trunking LS) appears at U504-pin18, where it connects to the µP U403-pin 80. The low speed data is read by the µP at twice the frequency of the sampling waveform; a latch configuration in the ASFIC CMP stores one bit every clock cycle.

  • Page 31: Troubleshooting Charts

    Chapter 3 TROUBLESHOOTING CHARTS This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio.

  • Page 32: Troubleshooting Flow Chart For Receiver Rf (Sheet 1 Of 2)

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) START Problem in 12 KHz and 25 KHz channel spacing 9V on Check Go to R310 (LNA) to U301 Go to RX_EN DC Section Okay ? DC Section Check D301-304 Check Replace IF Filters( FL304, FL301)

  • Page 33: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)

    Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) From Check visually all receiver Go to (IFIC -Vcc) components DC Section OK ? installation ? Inject - 40dBm (CW) Check to RF connector Installation the component...

  • Page 34: Troubleshooting Flow Chart For 25W Transmitter (Sheet 1 Of 3)

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) START No or too low power when keyed Check components between Current Q100 and RF output, >1.0A >430mA & <1.0A increase when Antenna Switch D104, keyed? D103, VR102 and Q106 be- fore replacing Q100 <500mA Control...

  • Page 35: Troubleshooting Flow Chart For 25W Transmitter (Sheet 2 Of 3)

    Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3) Check PA Stages No or too low power when keyed Voltage Check U403 at Q101 & Q102 Check Q101, base=0? R153,R136, R165, R122, R168, R137 Check resistive network at...

  • Page 36: Troubleshooting Flow Chart For 25W Transmitter (Sheet 3 Of 3)

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 25W Transmitter (Sheet 3 of 3 Check Final PA Stage PA_Bias Supply Voltage <2V Voltage at Replace Q100 R134 2.1V 2-3V Check Bias Tuning R134, R131, R106 before replacing RF Voltage ASFIC U504 Check FGU after C1044 - >100mV? Check components...

  • Page 37: Troubleshooting Flow Chart For Synthesizer

    Troubleshooting Flow Chart for Synthesizer Troubleshooting Flow Chart for Synthesizer 5V at Check 5V U200 pins 5, Start Regulator 20, 34 & 36 U503 Visual Correct check of the Problem Board OK? Is 16.8MHz 16.8MHz Replace Signal at signal at U200 Is U200 U200 Pin 19?

  • Page 38: Troubleshooting Flow Chart For Vco

    TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for VCO Low or no RF Signal Low or no RF Signal TX VCO RX VCO at input to PA at TP1 Visual check Visual check Correct of board of board Problem Make sure U508 is working correctly and runner 3.3 DC at U201 5V DC at U201...

  • Page 39: Troubleshooting Flow Chart For Dc Supply (Sheet 1 Of 2)

    Troubleshooting Flow Chart for DC Supply (1 of 2) Troubleshooting Flow Chart for DC Supply (1 of 2) Since the failure of a critical voltage supply might cause the radio to automatically power down, supply voltages should first be probed with a multimeter. If all the board voltages are absent, then the voltage test point should be retested using a rising-edge-triggered oscilloscope.
  • Page 40 3-10 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for DC Supply (2 of 2) D3_3V Check VDC on C5007 Go to Digital Section Check Voltage on V=3.3V C5041 Replace U510 Go to Start 9v<V<9.8v...
  • Page 41 PCB component layouts and the Parts Lists in this Chapter show both the Controller and VHF circuit components. The VHF and Controller schematics and the related PCB and parts list are shown in the tables below. Table 4-1 VHF2 1-25W Diagrams and Parts Lists PCB : 8488977U01-C Main Board Top Side...
  • Page 42 VHF2 PCB/ SCHEMATICS/ PARTS LISTS THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 43 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics FILT_SW_B+ FILT_SW_B+ COMP_B+ INTEGRATOR INTEGRATOR DET_VRVS DET_VRVS DET-VFWD DET_VFWD TX_EN TX_EN RX_EN RX_EN PWR_SET PWR_SET PA_CURRENT PA_CURRENT PA_BIAS PA_BIAS TX_INJ TX_INJ 73D02968C63-0 SHEET 1 OF 8 VHF2 Interconnection between Main Board and Power Amplifier Compartment...
  • Page 44 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics R101 C1007 C1064 C1097 C5100 L122 C1065 VR693 C1113 C1001 C1008 C1009 C1088 C1099 C1115 R102 R150 VR501 VR500 C1114 C1016 C1017 L126 C1063 R179 C1098 M102 R5082 R5081 R178 C1033 C5096...
  • Page 45 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics R113 C5000 R169 R114 R111 C1055 R127 C5086 C1109 R126 C1061 L117 C1003 U102 D402 VR692 C1002 C1110 R147 R175 R403 R404 C1035 D100 C5083 VR503 R421 M111 R405 C5060 L500 L100...
  • Page 46 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics D3_3V FILT_SW_B+ FILT_SW_B+ D3_3V TX_EN SPI_CLK SPI_MOSI SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS DIGITAL CH_ACT SQ_DET LSIO HSIO F1200 uP_CLK VS_AUDIO_SEL J3 - RESET D3_3V J3-12 J3-25 SERIAL CLOCK VOICE STORAGE AUDIO SELECT...
  • Page 47 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics TX_EN RX_EN FILT_SW_B+ (SOURCE) (SOURCE) (SOURCE) (SOURCE) (SOURCE) FILT_SW_B+ D3_3V FILT_SW_B+ SPI_MOSI D3_3V COMP_B+ COMP_B+ SPI_CLK ASFIC_CS PA_BIAS PA_BIAS CH_ACT PWR_SET PWR_SET SQ_DET PA_CURRENT LSIO PA_CURRENT HSIO TX_INJ F1200 uP_CLK DET_VFWD FILT_SW_B+...
  • Page 48 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics PA_FILT_B+ (SOURCE) L100 IF109 1019447 L119 1019447 COMP_B+ R186 IF110 R137 39.K C1115 C1099 C1100 C1116 220.p 220.p C1053 C1000 C1110 C1109 C1106 C1089 C1107 C1103 C1112 FLT_9V 220.p 220.p 220.p 220.p...
  • Page 49 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics IF100 PA_CURRENT R132 R114 LM2904 100.K 10.K U102 Final_cur_sense R111 R177 C1095 R113 220.p 100. 10.K C1055 FILT_SW_B+_PA R101 C1056 C1073 R110 R112 R115 100.K 10.K C1058 R116 L117 10.K 1019447 C1025 C1024 4.7p...
  • Page 50 0.1uF V_SF Y200 45J68 VCON C2053 R210 16.8MHz 100p 100.K Y201 14R06 FREQ C2052 100p C2033 C2014 C2002 C2072 D202 0.1uF 4.7uF 2.7p L210 100nH R208 100.K C2068 6.8p C2067 8.2p VHF2 (146-174MHz) Synthesiser and VCO (Sht 1 of 2)
  • Page 51 220. BFS540 SHIELD R211 VCO_MOD 47.K R212 30.K L215 47nH C2044 R213 R227 C2032 3.3p 4.7K 100. D205 VCO Shield SH202 SHIELD R201 C2029 VCOBIC Shield 73D02968C63-0 SHEET 5 OF 8 VHF2 (146-174MHz) Synthesiser and VCO (Sht 2 of 2)
  • Page 52 82.p L307 C345 L308 C341 33.47n 33.47n C344 82.p SH300 T301 SHIELD SH302 XFMR SHIELD RX_INJ L313 L312 C326 C327 33.47n 33.47n C362 R301 C361 C348 470. TEST_POINT TEST_POINT VHF2 (146-174MHz) Receiver Front and Back End (Sht 1 of 2)
  • Page 53 100n 15.K R313 12.K C309 100n Y301 R311 06B09 15.K 44.395MHz DEMOD R320 R331 10.K R303 C356 680. C322 4.7n R321 8.2K L315 73D02968C63-0 27nH SHEET 6 OF 8 VHF2 (146-174MHz) Receiver Front and Back End (Sht 2 of 2)
  • Page 54 24.K 2.2u IGNITION D513 100n C5102 R5082 R5083 100n 51.K 270.K D501 FILT_B+ VSTBY VS_AUDIO_SEL C5111 R5103 Q503 Q500 MIC_AUDIO_CH 24.K R5089 R5085 C5038 C5110 VR502 C5045 C5120 C5071 100.n VHF2 (146-174MHz) DC and Audio Circuits (Sht 1 of 2)
  • Page 55 C5099 C5100 U515 SPI_MOSI 220.p 220.p 220.p 220.p R5051 F1200 12.K Q501 C5091 R5026 uP_CLK 82.p 33.K R5027 R5072 U507 270.K 4.7K LM2904 73D02968C63-0 SHEET 7 OF 8 R5014 C5077 VHF2 (146-174MHz) DC and Audio Circuits (Sht 2 of 2)
  • Page 56 A(11) A(12) PROG_IO-P14_O VS_RAC A(13) A(14) D3_3V OPT_EN_OPBD A(15) D3_3V D3_3V A(16) TX_EN R414 R443 R442 RX_EN A(17) R463 Q417 R415 3.3K 10.K 10.K R426 R427 A(18) 100.K 100.K A18_RES VHF2 (146-174MHz) Microprocessor and Controller Circuits (Sht 1 of 2)
  • Page 57 D3_3V R432 PROG_OUT-ALARM_4 33.K SPI_CLK CLK_S PROG_IO-P8_O CLK_L PROG_IO-P12_O EN_OE PROG_IO-P14_O R453 RESET VS_AUDIO_SEL Q408 3.3K U405 PROG_IO-P14_I MC74HC595A VS_GAIN_SEL C421 SPI_MOSI SERIN SEROUT 22.n Q405 PROG_IO-P14_O DNP IN MARLIN VHF2 (146-174MHz) Microprocessor and Controller Circuits (Sht 2 of 2)
  • Page 58 4-18 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics U100 LM2904 R141 22.K L101 IF701 C1046 DET_VFWD C1045 C1075 C1071 FILT_SW_B+ R117 IF702 INTEGRATOR R140 22.K R164 R144 22.K 10.K C1049 C1082 U100 C1048 LM2904 R146 IF700 DET_VRVS 22.K L102...
  • Page 59 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics 4-19 2.1 VHF2 PCB 8488977U01 (rev. C) Parts List Circuit Motorola Circuit Motorola Circuit Motorola 1-25W Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. C1030 2113743E07 CER CHIP CAP .022UF...
  • Page 60 4-20 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C1127 2360567A03 CAP TANTALUM C2027 2113741F49 CAP CHIP CL2 X7R REEL 10000...
  • Page 61 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics 4-21 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C337 2113740F57 CAP CHIP REEL CL1 +/-30 180...
  • Page 62 4-22 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C5068 2113741F25 CAP CHIP CL2 X7R REEL 1000...
  • Page 63 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics 4-23 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. FL304 9180469V06 SMD455KHZ 6 ELEMENT CER L126...
  • Page 64 4-24 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R105 0680194M18 RES 51 OHMS 5% 1W...
  • Page 65 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics 4-25 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R314 0662057A75 CHIP RES 12K OHMS 5%...
  • Page 66 4-26 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R5039 0662057A97 CHIP RES 100K OHMS 5%...
  • Page 67 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics 4-27 Circuit Motorola Description Ref. Part No. VR402 4813830A09 DIODE 3.3V 5% 225MW MMBZ5226B VR500 4813832C77 TRANS SUP. 24V HIGH PWR VR501 4813830A14 DIODE 5.1V 5% 225MW MMBZ5231B_ VR502 4813830G09 DIODE 3.3V 5% ‘CK’ 500MW...
  • Page 68 4-28 VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics...

This manual is also suitable for:

Commercial series

Table of Contents