Motorola Cp200 Detailed 6880309n62 C Manual
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6880309N62-CJune, 2005 UHF Troubleshooting Tables: Troubleshooting Table for Transmitter 11-5 Poor TX range, conducted power OK1. RF test jack defective Verify continuity of J140 pins 3 and 4 in RX mode only.Replace J140. 2. Antenna matching net- work faultVisually inspect components C140- 141, L140 or L141. Check dc conti- nuity of L140 or L141in RX mode only.Repair/replace if necessary. 3. Defective or wrong antennaVerify correct antenna is installed. Try another antenna.Replace antenna. No internal mic audio (EXT MIC audio OK) 1. Mic bias faultVerify U451-35 is low when side PTT is pressed. Verify Q470-6 is high when side PTT button is pressed.Check/replace U451. Check/replace R474, R476, and Q470. 2. Defective mic Verify approx 1.8V dc across car- tridge when side PTT button is pressed. Verify audio present (~10 mV rms) when speaking into mic.Check mic connector and R478. Replace mic cartridge. 3. Defective mic jackVerify continuity between J471 pins 4 and 5.Replace J471. No EXT MIC audio 1. Mic bias fault Verify approx 1.8V dc across EXT MIC cartridge in TX mode. Verify audio present (~10 mV rms) when speaking into mic.Check Q470. R475, R477, L471. Check VR473, VR475, D470 for shorts. 2. Audio path faultVerify mic audio present (~10 mV rms) at U451-46. Verify amplified mic audio present (~200 mV rms) at U451-40.Check L471, C470. Check/replace U451. 3. Defective audio acces- soryTry another accessory. Replace defective accessory. Table 11-3. Troubleshooting Table for Transmitter (Continued) Symptom Possible Causes Procedure Corrective Action
June, 20056880309N62-C 11-6UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11.4 Troubleshooting Table for Board and IC Signals Table 11-4. Troubleshooting Table for Board and IC Signals IC Designator Pin Pin Function DC Voltage Comments (Condition) U51 IFIC1RF input 44.85 MHz1.20 2 RF input decoupling 1.20 32nd LO osc output4.02 4 2nd LO osc input 4.60 5RSSI output0.74(no received signal) 6 Vcc 4.70 7Audio feedback0.89 8 Audio output 1.44 DEMOD to stage U510 9RSSI feedback0.74(no received signal) 10 Quad detector input 2.22 11Limiter output1.25 12 Limiter decoupling 2 1.30 13Limiter decoupling 11.30 14 Limiter input 1.28 15GroundGND 16 IF amp output 1.22 17IF amp decoupling 21.26 18 IF amp input 1.26 19IF amp decoupling 11.26 20 2nd mixer output 3.09 U52 BW Select Switch 1Inverter 1 input0(25 kHz mode) 2 Inverter 2 output 0 (25 kHz mode) 3Inverter 3 input (NU)GND 4Ground GND 5Inverter 3 output (NU)4.96 6 Inverter 2 input 3.00 (25 kHz mode) 7Inverter 1 output4.95(25 kHz mode) 8 Vcc 4.96
6880309N62-CJune, 2005 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-7 U110 RF Power Amp 1RF input0(TX mode) 2 Vgg (gate bias) 2.65 (typ) (TX mode) (4.25V typ at VHF) 3Vdd 6.59(TX mode) 4 RF output -- Do not measure 5GroundGND U150 Dual Opamp1 Unit 1 output 4.20 (typ) (TX mode) (5.8V typ at VHF) 2Unit 1 (-) input2.39 (typ)(TX mode) 3 Unit 1 (+) input 2.39 (typ) (TX mode) 4GroundGND 5 Unit 2 (+) input 3.30 (typ) (TX mode) 6Unit 2 (-) input3.35 (typ)(TX mode) 7 Unit 2 output 2.23 (typ) (TX mode) 8Vcc6.79(TX mode) U201 Freq Synthesizer1 AUX2 output (NU) 0 2AUX3 output (TRB)0.03To U251-19 (RX mode) 3 AUX4 output (NU) 0 4Lock detect output2.98To U401-56 5PD Vdd 2.98 6Digital groundGND 7 Serial data input 3.23 8Serial clock input0 9 Synth chip select 3.23 From U401-47 10Modulation input1.50From U451-40 11 VMULT4 (NU) 2.98 12VMULT3 (NU)0 13 VRO 4.96 14VMULT21.49 15 VMULT1 1.49 16INDMULT (NU)0 17 NC1 0 18Ref select (NU)0 19 Buffered 16.8 MHz out 1.54 20Analog Vdd3.00 21 V bypass (NU) 1.55 22Analog groundGND 23 Ref osc XTAL1 2.07 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)
June, 20056880309N62-C 11-8UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals U201 Freq Synthesizer 24Ref osc XTAL20 25 Ref osc warp output 3.00 26Superfilter cap4.48 27 Superfilter base (NU) 3.76 28Superfilter output4.52 29 NC2 0 30Superfilter input4.96 31 NC3 0 32Prescaler input1.97 33 Prescaler ground GND 34Prescaler Vdd2.99 35 Prescaler Vref (NU) 1.97 36Digital Vdd2.99 37 TEST1 (NU) 0.01 38TEST2 (NU)0 39 Bias 2 3.38 (typ) (1.34V in TX mode) 40Bias 11.50 (typ)(3.20V in TX mode) 41 Modulation output 3.42 (typ) (1.62V typ in TX mode) 42CCOMP (NU)0.05 43 Steering line IOUT 9.62 (typ) Depends on frequency 44PD groundGND 45 Steering line IADAPT 9.62 (typ) Depends on frequency 46Adapt switch (NU)0 47 Voltage from charge pump 12.8 48AUX1 output (NU)2.98 U251 VCO / Buffer1 TX VCO current adjust 4.50 2RX VCO current adjust4.35 3 Superfiltered input 4.51 4Collector RF in amp4.35 5 RX VCO base 1.27 6RX VCO emitter0.48 7 RX switch output (NU) 0 8RX buffered VCO output3.36 9 GND_FLAG GND 10TX buffered VCO output3.36 11 GND_BUFFERS GND Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)
6880309N62-CJune, 2005 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-9 U251 VCO / Buffer 12Prescaler output2.26 13 TX switch output (NU) 0.06 14Vcc_BUFFERS3.00 15 TX VCO emitter 0 (RX mode) 16TX VCO base0(RX mode) 17 GND_LOGIC GND 18Vcc_LOGIC3.00 19 TRB input 0.03 From U201-2 (RX mode) 20FLIP inputGND U310 5V Regulator1 Vin 7.48 2GroundGND 3 Control input 7.48 4Bypass capacitor1.26 5Vout 4.96 U320 3.3V Regulator 1GroundGND 2 Feedback 1.23 3Ta p ( N U )0 4 Vin 7.48 5Vo u t3.23 6 Sense (NU) 0 7Error (reset output)3.20 8 Shutdown input 7.48 U330 3V Regulator 1Vin7.48 2 Ground GND 3Control input7.48 4 Bypass capacitor 1.26 5Vo u t3.00 U401 Microprocessor1 PD4_SCK serial clock input 0 2PD5_SS3.23ASFIC chip select 3 PD6_VLIN 3.23 EEPROM chip select 4PG7_R_W3.21 5 PG6_AS 3.23 6PG0_XA133.23 7 PB7_ADDR15 0.026 8PB6_ADDR140.028 9 PB3_ADDR11 3.06 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)
June, 20056880309N62-C 11-10UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals U401 Microprocessor 10PB1_ADDR93.05 11 PB2_ADDR10 0.16 12VDD3.23 13 VSS GND 14PBO_ADDR83.05 15 PB5_ADDR13 0.13 16PG1_XA140.20 17 PG4_XA17 3.17 18PG5_XA180 19 PG3_XA16 3.21 20PG2_XA150.30 21 PB4_ADDR12 0.22 22PF7_ADDR73.03 23 PF6_ADDR6 3.08 24PF5_ADDR53.06 25 PF4_ADDR4 0.16 26PF3_ADDR30.26 27 PF2_ADDR2 3.06 28PF1_ADDR13.06 29 PFO_ADDR0 3.05 30PC0_DATA00.69 31 PC1_DATA1 0.96 32PC2_DATA21.10 33 PC3_DATA3 0.81 34PC4_DATA40.62 35 PC5_DATA5 0.68 36PC6_DATA60.67 37 PC7_DATA7 0.73 38PH7_CSPROG3.05 39 VDDL 3.23 40VSSLGND 41 PH6_CSGP2 3.23 42PH5_CSGP13.23 43 PH4_CSIO 0 44PH3_PW43.21On/off control output 45 PH2_PW3 0 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)
6880309N62-CJune, 2005 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-11 U401 Microprocessor 46PH1_PW23.00 47 PH0_PW1 3.23 Synth chip select 48XIRQ3.00 49 PI7 1.48 RX enable 50PI60.01TX enable 51 PI5 3.23 52PI40Green LED enable 53 PI3 0 Red LED enable 54PI20 55 PI1 0 56PI02.98Lock detect from U201-4 57 MODB_VSTBY 3.22 Boot mode enable 58MODA_LIR3.12 59 AVDD 3.23 60PE7_AN73.20 61 PE6_AN6 3.20 62PE5_AN52.91VOX threshold detect 63 PE4_AN4 0.73 RSSI input 64PE3_AN30.14 65 PE2_AN2 1.62 66PE1_AN10 - 3.3 VVolume control wiper 67 PE0_AN0 2.48 33% of battery voltage 68VRL0 69 VRH 3.20 70AVSSGND 71 PJ0_CSGP3 3.23 Side PTT button 72PJ1_CSGP40External MIC PTT 73 PJ2 3.23 74PJ33.23 75 PJ4 3.23 76PJ50 77 PJ6 3.23 Bottom option button 78PJ73.23Top option button 79 PA0_IC3 0 80PA 1 _ I C 21.57 81 PA2_IC1 3.00 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)
June, 20056880309N62-C 11-12UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals U401 Microprocessor 82PA3_IC4_OC5_OC13.00 83 PA4_OC4_OC1 0 Squelch detect input 84PA5_OC3_OC10Channel activity input 85 PA6_OC2_OC1 0 86PA 7 _ PA 1 _ O C 10 87 VSSR GND 88VDDR3.23 89 ECLK (NU) 1.60 90EXTAL1.70Clock from U451-28 91 XTAL 1.40 Not used 92VDDSYN0 93 XFC (NU) 0 94RESET3.20From U320 95 LVOUT 0 96IRQ3.20 97 PD0_RXD 3.23 98PD1_TXD1.9 99 PD2_MISO 0 100PD3_MOSI3.23 U402 EEPROM1 Chip select 3.23 From U401-3 2Serial data out0 3 Write protect 3.23 4VssGND 5 Serial data in 3.23 6Serial clock0 7Hold 3.23 8Vcc3.23 U404 Flash ROM1 A11 3.06 2A93.08 3A8 3.05 4A130.13 5 A14 0.31 6NC3.17 7 EN_WE 3.21 From U401-4 8Vcc3.23 9 RESET 3.20 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)
6880309N62-CJune, 2005 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 11-13 U404 Flash ROM 10A163.17 11 A 1 5 0 . 3 0 12A120.22 13 A7 3.03 14A63.08 15 A5 3.06 16A40 17 A3 0.24 18A23.08 19 A1 3.05 20A03.05 21 D0 0.69 22D10.94 23 D2 1.08 24GNDGND 25 D3 0.78 26D40.59 27 D5 0.66 28D60.67 29 D7 0.75 30EN_CE3.01From U401-38 31 A10 0.16 32EN_OE0From U401-86 U451 ASFIC_CMP1 VDD for analog circuits 3.00 2DISC audio input1.34From U510 3 Ground for analog circuits GND 4DACU output0 5 DACR output 0 6DACG output2.38 (typ)Power set (TX mode) 7 VOX peak detector output 2.91 8PLCAP for DC integrator0.40 9 SQIN 0.01 10Universal audio input/output0 11 VDD for DACs 4.95 12SQCAP0 13 GCB2 general purpose output 0 Audio PA_EN (unsquelched) Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)
June, 20056880309N62-C 11-14UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals U451 ASFIC_CMP 14GCB1 general purpose output0 15 GCB0 general purpose output 3.00 BW select (25 kHz mode) 16Squelch channel activity output0To U401-84 17 Squelch detect digital output 0 To U401-83 18PL/low speed data I/O1.50 19 High speed data I/O 3.00 20Chip select3.23From U401-2 21 Serial clock input 0 22Serial data input3.23 23 Ground for clock synthesizer GND 24Loop filter cap for clock syn0.74 25 PLCAP2 for LS integrator 1.17 26Not used0 27 Vdd for clock synthesizer 3.00 28Clock synthesizer output1.70 29 1200 Hz ref for MDC decode 3.00 30GNDDOGND 31 Ground for digital circuits GND 32Vdd for analog switches4.96 33 Vdd for digital circuits 3.00 3416.8 MHz master clock input1.54 35 GCB3 general purpose output 3.00 Internal MIC enable 36TX audio return from option0 37 GCB4 general purpose output 0 38GCB5 general purpose output0 39 RX audio send to option 1.48 40Modulation output1.50To U201-10 41 RX audio out to power amp 1.51 42Flat TX audio return from option0.20 43 RX audio return to option 1.50 44Flat TX audio send to option1.50 45 Vdd for audio path I/O filters 3.00 46Mic audio input1.50 47 Ground for audio path I/O filters GND 48Ext mic audio input (not used)0 Table 11-4. Troubleshooting Table for Board and IC Signals (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)