Motorola CP040 Series Service Information
  1. Manuals
  2. Brands
  3. Motorola Manuals
  4. Radio
  5. CP040
  6. Service information

Motorola CP040 Series Service Information

Commercial radios uhf1
Hide thumbs Also See for CP040 Series:
Table of Contents

Advertisement

Quick Links

Download this manual
Commercial Series
CP040 Radios
UHF1 (403-440MHz)
Service Information
Issue: October 2004

Advertisement

Table of Contents
loading

Related Manuals for Motorola CP040 Series

Summary of Contents for Motorola CP040 Series

  • Page 1 Commercial Series CP040 Radios UHF1 (403-440MHz) Service Information Issue: October 2004...
  • 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 CP040 Model Chart .....................1-1 2.0 Technical Specifications ..................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 UHF1 (403-440MHz) Receiver ................2-1 2.1 Receiver Front-End ..................2-2 2.2 Receiver Back-End..................2-3 3.0 UHF1 (403-440MHz) Transmitter.................2-4 3.1 Transmitter Power Amplifier ................2-4 3.2 Antenna Switch....................2-4 3.3 Harmonic Filter ....................2-5...

  • Page 5: Model Chart And Technical Specifications

    Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS CP040 Model Chart CP040 UHF1 403-440 MHz Model Description MDH50QDC9AA1_N CP040 403-440 MHz 4W 4-Ch MDH50QDC9AA2_N CP040 403-440 MHz 4W 16-Ch Item Description PMUE1984_ CP040 403-440 MHz 4W 4-Ch Tanapa PMUE1985_ CP040 403-440 MHz 4W 16-Ch Tanapa PMLE4297_ CP040, Back Cover Kit 403-440 MHz 4-Ch PMLE4298_...

  • Page 6: Technical Specifications

    MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General UHF1 Frequency: 403-440 MHz Channel Capacity: 4 or 16 Channels 7.5 Volts ±20% Power Supply: Dimensions: with High Capacity Li-Ion Battery and with Standard NiMH Battery: 128.7mm H x 61.7mm W x 44.1mm D with Slim Li-Ion Battery: 128.7mm H x 61.7mm W x 41.3mm D...
  • Page 7 Technical Specifications Transmitter Specifications UHF1 RF Output High NiMH @ 7.5V: Frequency: 403-440 MHz Channel Spacing: 12.5/20/25 kHz Freq. Stability: 0.00025% (-30°C to +60°C) Spurs/Harmonics: -36 dBm < 1 GHz -30 dBm > 1 GHz Audio Response: +1, -3 dB (from 6 dB/oct.
  • 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 UHF1 circuits in the radio. Schematic diagrams and board layout diagrams are included in Chapter 4 in this Section of the manual. UHF (403-440MHz) Receiver The UHF receiver covers the range of 403-440 MHz and provides switchable IF bandwidth for use with 20/25/30 kHz or 12.5 kHz channel spacing systems.

  • Page 10: Receiver Front-End

    THEORY OF OPERATION Receiver Front End Incoming RF signals from the antenna are first routed through the harmonic filter and antenna switch, part of the transmitter circuitry, before being applied to the receiver front end. The receiver front end consists of a preselector filter, RF amplifier, an interstage filter, and a double-balanced first mixer.

  • Page 11: Receiver Back-End

    UHF (403-440MHz) Receiver Receiver Back End The receiver back end is a dual conversion design. High IF selectivity is provided by FL51, a 4-pole fundamental mode 44.85 MHz crystal filter with a minimum 3 dB bandwidth of ±6.7 kHz, a maximum 20 dB bandwidth of + 12.5 kHz, and a maximum insertion loss of 3.5 dB.

  • Page 12: Transmitter Power Amplifier

    THEORY OF OPERATION UHF Transmitter The UHF transmitter covers the range of 403-440 MHz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (4 watts) and low power (1 watt), or is factory preset to 2 watts. The transmitter is divided into four major blocks as shown in Figure 2-2.

  • Page 13: Harmonic Filter

    UHF Transmitter Harmonic Filter The harmonic filter consists of components C122 and L130-L132. The harmonic filter is a seven- pole Chebychev low-pass configuration, optimized for low insertion loss, with a 3 dB frequency of approximately 600 MHz and typically less than 0.8 dB insertion loss in the passband. Antenna Matching Network The harmonic filter presents a 50Ω...
  • Page 14 THEORY OF OPERATION UHF Frequency Generation Circuitry The frequency generation system, shown in Figure 2-3, is composed of two circuit blocks, the Fractional-N synthesizer IC U201, the VCO/Buffer IC U251, and associated circuitry. Figure 2-4 shows the peripheral interconnect and support circuitry used in the synthesizer block, and Figure 2-5 details the internal circuitry of the VCOBIC and its interconnections to the surrounding components.

  • Page 15: Fractional-N Synthesizer

    UHF Frequency Generation Circuitry Fractional-N Synthesizer The Fractional-N synthesizer, shown in Figure 2-4, uses a 16.8 MHz crystal (Y201) to provide the reference frequency for the system. External components C201-C203, R202 and D201 are also part of the temperature-compensated oscillator circuit. The dc voltage applied to varactor D201 from U201 pin 25 is determined by a temperature-compensation algorithm within U201, and is specific to each crystal Y201, based on a unique code assigned to the crystal that identifies its temperature characteristics.

  • Page 16: Voltage Controlled Oscillator (Vco)

    THEORY OF OPERATION Voltage Controlled Oscillator (VCO) The VCOBIC (U251), shown in Figure 2-5, in conjunction with the Fractional-N synthesizer (U201) generates RF in both the receive and the transmit modes of operation. The TRB line (U251 pin 19) determines which oscillator and buffer are enabled. A sample of the RF signal from the enabled oscillator is routed from U251 pin 12 through a low pass filter, to the prescaler input of the synthesizer IC (U201 pin 32).

  • Page 17: Troubleshooting Tables

    Chapter 3 TROUBLESHOOTING TABLES This section contains detailed troubleshooting tables. These tables 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 18 TROUBLESHOOTING TABLES Symptom Possible Causes Procedure Corrective Action No Audio 1. Synthesizer out of lock Verify U201-4 is at 3V dc. Troubleshoot synthesizer/VCO circuits. 2. Defective IFIC Verify audio is present at U51-8. Check Q70, Y70, U51. 3. RX audio buffer fault Verify audio is present at U451-2.

  • Page 19: Troubleshooting Table For Synthesizer

    Troubleshooting Table for Synthesizer Troubleshooting Table for Synthesizer Symptom Possible Causes Procedure Corrective Action Synthesizer Out of 1. VCO fault Verify oscillator is working, check RF Check VCO tank components Lock (RX mode level at U251-10 per schematic. connected to U251-5 and 6. only) Check dc voltages at U251 pin 2 Check for shorts/opens, replace...

  • Page 20: Troubleshooting Table For Transmitter

    TROUBLESHOOTING TABLES Troubleshooting Table for Transmitter Symptom Possible Causes Procedure Corrective Action No Transmit (no 1. PTT switch defective. Verify U401-71 goes low when PTT Replace PTT switch S441. TX LED indication) is pressed. 2. EXT MIC PTT fault Verify U401-72 goes low when J471- Check/replace Q470, L471 etc.
  • Page 21 Troubleshooting Table for Transmitter Symptom Possible Causes Procedure Corrective Action Poor TX range, 1. RF test jack defective Verify continuity of J140 pins 3 and 4 Replace J140. conducted power in RX mode only . 2. Antenna matching net- Visually inspect components C140- Repair/replace if necessary.

  • Page 22: Troubleshooting Table For Board And Ic Signals

    TROUBLESHOOTING TABLES Troubleshooting Table for Board and IC Signals IC Designator Pin Function DC Voltage Comments (Condition) RF input 44.85 MHz 1.20 IFIC RF input decoupling 1.20 2nd LO osc output 4.02 2nd LO osc input 4.60 RSSI output 0.74 (no received signal) 4.70 Audio feedback...
  • Page 23 Troubleshooting Table for Board and IC Signals IC Designator Pin Function DC Voltage Comments (Condition) U110 RF input (TX mode) RF Power Amp Vgg (gate bias) 2.65 (typ) (TX mode) 6.59 (TX mode) RF output Do not measure Ground U150 Unit 1 output 4.20 (typ) (TX mode)
  • Page 24 TROUBLESHOOTING TABLES IC Designator Pin Function DC Voltage Comments (Condition) U201 Ref osc XTAL2 Freq Synthesizer Ref osc warp output 3.00 Superfilter cap 4.48 Superfilter base (NU) 3.76 Superfilter output 4.52 Superfilter input 4.96 Prescaler input 1.97 Prescaler ground Prescaler Vdd 2.99 Prescaler Vref (NU) 1.97...
  • Page 25 Troubleshooting Table for Board and IC Signals IC Designator Pin Function DC Voltage Comments (Condition) U251 Prescaler output 2.26 VCO / Buffer TX switch output (NU) 0.06 Vcc_BUFFERS 3.00 TX VCO emitter (RX mode) TX VCO base (RX mode) GND_LOGIC Vcc_LOGIC 3.00 TRB input...
  • Page 26 3-10 TROUBLESHOOTING TABLES IC Designator Pin Function DC Voltage Comments (Condition) U401 PB1_ADDR9 3.05 Microprocessor PB2_ADDR10 0.16 3.23 PBO_ADDR8 3.05 PB5_ADDR13 0.13 PG1_XA14 0.20 PG4_XA17 3.17 PG5_XA18 PG3_XA16 3.21 PG2_XA15 0.30 PB4_ADDR12 0.22 PF7_ADDR7 3.03 PF6_ADDR6 3.08 PF5_ADDR5 3.06 PF4_ADDR4 0.16 PF3_ADDR3 0.26...
  • Page 27 Troubleshooting Table for Board and IC Signals 3-11 IC Designator Pin Function DC Voltage Comments (Condition) U401 PH1_PW2 3.00 Microprocessor PH0_PW1 3.23 Synth chip select XIRQ 3.00 1.48 RX enable 0.01 TX enable 3.23 Green LED enable Red LED enable 2.98 Lock detect from U201-4 MODB_VSTBY...
  • Page 28 3-12 TROUBLESHOOTING TABLES IC Designator Pin Function DC Voltage Comments (Condition) U401 PA3_IC4_OC5_OC1 3.00 Microprocessor PA4_OC4_OC1 Squelch detect input PA5_OC3_OC1 Channel activity input PA6_OC2_OC1 PA7_PA1_OC1 VSSR VDDR 3.23 ECLK (NU) 1.60 EXTAL 1.70 Clock from U451-28 XTAL 1.40 Not used VDDSYN XFC (NU) RESET...
  • Page 29 Troubleshooting Table for Board and IC Signals 3-13 IC Designator Pin Function DC Voltage Comments (Condition) U404 3.17 Flash ROM 0.30 0.22 3.03 3.08 3.06 0.24 3.08 3.05 3.05 0.69 0.94 1.08 0.78 0.59 0.66 0.67 0.75 EN_CE 3.01 From U401-38 0.16 EN_OE From U401-86...
  • Page 30 3-14 TROUBLESHOOTING TABLES IC Designator Pin Function DC Voltage Comments (Condition) U451 GCB1 general purpose output ASFIC_CMP GCB0 general purpose output 3.00 BW select (25 kHz mode) Squelch channel activity output To U401-84 Squelch detect digital output To U401-83 PL/low speed data I/O 1.50 High speed data I/O 3.00...
  • Page 31 Troubleshooting Table for Board and IC Signals 3-15 IC Designator Pin Function DC Voltage Comments (Condition) U480 Unit 1 output 2.48 Dual Opamp Unit 1 (-) input 2.48 Unit 1 (+) input 2.46 Ground Unit 2 (+) input 0.28 Unit 2 (-) input 0.29 Unit 2 output 4.96...
  • Page 32 3-16 TROUBLESHOOTING TABLES...
  • Page 33 Chapter 4 UHF1 PCB/SCHEMATICS/PARTS LISTS Allocation of Schematics and Circuit Boards UHF1 (403-440MHz) The UHF1 circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for the UHF circuits, the Controller circuits are contained in Section 2 of this manual.

  • Page 34: Speaker And Microphone Schematic

    UHF1 PCB/SCHEMATICS/PARTS LISTS Speaker and Microphone Schematic MATES WITH J470 ON RADIO BOARD MATES WITH J491 ON RADIO BOARD 1.3.1 Speaker and Microphone Parts List Reference Motorola Part Description Designator 5080258E16 Microphone, electret 5005679X04 Speaker assembly with connector...

  • Page 35: Uhf1 Pcb 8486635Z03-O Schematic Diagrams

    UHF1 PCB 8486635Z03-O Schematic Diagrams UHF1 PCB 8486635Z03-O Schematic Diagrams D301 C488 C465 R480 C458 C454 S444 C513 C480 J471 R470 R473 R264 U451 R254 FL54 R496 L265 L255 C470 R253 C267 C473 R472 C256 R481 C257 C302 C489 C482 R522 C455 L264...
  • Page 36 UHF1 PCB 8486635Z03-O Schematic Diagrams C206 R206 C52 C53 C220 C417 R416 R411 D121 U151 C222 R434 L140 R502 R433 R432 C221 FL51 C122 R150 R501 C223 C157 L132 L141 C224 C132 R151 C159 SH200 R154 C158 L130 C152 R227 C227 C228 C115...
  • Page 37 UHF1 PCB 8486635Z03-O Schematic Diagrams UHF R1 USWB + USWB+ USWB+ USWB TX_EN A TX_ENA PWR_SET TX_UHF_R1 PWR_SET RX_BE RX_FE_UHF_R1 DEMOD DEMOD CONTROLLER BW_SEL BW_SEL IF_IN IF_OUT RX_IN RX_OUT RSSI RSSI TX_INJ RX_INJ MOD_OUT MOD_IN PRESC PRESC 16_8_MHZ 16_8_MHZ VCO_UHF_R1 RX_INJ SYNTH_UHF_R1 V_STEER...
  • Page 38 UHF1 PCB 8486635Z03-O Schematic Diagrams FE_5R 5.6K 390pF UMT1 UHF R1 Front End SH40 SHIELD SHIELD 390pF 390pF 18nH 0.1uF 5.6K C523 0.55pF C521 4.2V 5.5% FE_IF_OUT 1.2K 390pF 3.3pF C522 IF_OUT 3.0% 680nH 18pF 1.8pF 1.8pF 20pF 390pF 2.2pF 0.79V RX_IN 4.5%...
  • Page 39 UHF1 PCB 8486635Z03-O Schematic Diagrams RX Back End (Overtone) U52-1 FL53 TC7W04F CFWC455E 0.1uF OUT 2 U52-2 100K TC7W04F IF_BAND_SEL 5V for 25kHz BW_SE L 0V for 12.5kHz 0.1uF FL54 CFWC455G 1 IN 47pF U52-3 3.3K SH50 SH52 TC7W04F SHIELD SHIELD U52-4 2.4K...
  • Page 40 UHF1 PCB 8486635Z03-O Schematic Diagrams UHF R1 Synthesizer FN_V_SF 4.5V V_SF SH200 SH201 C231 C232 C233 SHIELD SHIELD R247 R230 LOCK: 3V 1000pF 0.1uF 4.7uF UNLOCK: 0V FN_LOCK LOCK C204 31 NC3 WARP 470pF 29 NC2 INDMULT 17 NC1 SFOUT ADAPTSW 42 CCOMP LOCK...
  • Page 41 UHF1 PCB 8486635Z03-O Schematic Diagrams UHF R1 VCO V_SF VCO_VSF L270 R273 R277 4.5V V_SF 220nH C270 C274 C292 C285 VCO_3V 390pF 0.1uF 390pF 0.1uF L272 220nH SH250 SH251 SH253 C272 SHIELD SHIELD SHIELD L292 0.1uF L282 R284 15nH 15nH C273 R272 R271...
  • Page 42 UHF1 PCB 8486635Z03-O Schematic Diagrams 4-10 UHF R1 Tx PA_USWB+ USWB+ Q171 PA_TX_ENA TX_ENA C170 390pF Q170 EMB10 C525 390pF C172 R120 C157 C154 390pF 390pF 0.1uF R152 R121 100K R158 R159 R153 C151 U151 100K 390pF 5.1K U150-2 C150 C156 LM2904 57R01...

  • Page 43: Uhf1 Pcb 8486635Z03-O Parts List

    UHF1 PCB 8486635Z03-O Parts List 4-11 UHF1 PCB 8486635Z03-O Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Parts List Part No. Part No. Part No. Circuit Motorola Not_Placed CAP, 10pF C107 2113743N13 CAP, 3pF C210 2113743L09 CAP, 470pF Description Part No.
  • Page 44 UHF1 PCB 8486635Z03-O Parts List 4-12 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. C270 2113743L07 CAP, 390pF C405 2113743N50 CAP, 150pF C462 2113743E20 CAP, 0.1uF C513 2113740F59...
  • Page 45 UHF1 PCB 8486635Z03-O Parts List 4-13 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Part No. Part No. Part No. Part No. J470 0985818A01 CONN_J L272 2413926N28 IDCTR, 220nH 0662057M43 RES, 51 R153 0662057V27 RES, 100K...
  • Page 46 SH52 2686424Z01 SHIELD Y202 Not_Placed 45J68 R423 0662057N23 RES, 100K R491 0662057M01 RES, 0 SH100 2686418Z01 SHIELD * Motorola Depot Servicing only R424 0662057V35 RES, 200K R492 0662057N08 RES, 24K SH200 2686424Z01 SHIELD R425 0662057V27 RES, 100K R493 0662057N35 RES, 330K...

This manual is also suitable for:

Commercial cp040 series

Table of Contents