Motorola Portable Radio Ep450 Detailled Hkln4216c Manual
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HKLN4216CJune, 2005 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 6-7 6.4 Troubleshooting Table for Board and IC Signals Table 6-4. 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...
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June, 2005HKLN4216C 6-8VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals U110 RF Power Amp 1RF input0(TX mode) 2 Vgg (gate bias) 2.65 (typ) (TX mode) (4.25 V 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) (5.8 V 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...
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HKLN4216CJune, 2005 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 6-9 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) (1.34 V in TX mode) 40Bias 11.50 (typ)(3.20 V in TX mode)...
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June, 2005HKLN4216C 6-10VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 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 5 V Regulator1 Vin 7.48 2GroundGND 3 Control input 7.48 4Bypass capacitor1.26 5Vout 4.96 U320 3.3 V Regulator 1GroundGND 2 Feedback 1.23 3Tap (NU)0 4 Vin 7.48 5Vo u t3.23 6...
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HKLN4216CJune, 2005 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 6-11 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...
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June, 2005HKLN4216C 6-12VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 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...
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HKLN4216CJune, 2005 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 6-13 U401 Microprocessor 82PA3_IC4_OC5_OC13.00 83 PA4_OC4_OC1 0 Squelch detect input 84PA 5 _ O C 3 _ O C 10Channel 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...
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June, 2005HKLN4216C 6-14VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 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...
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HKLN4216CJune, 2005 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 6-15 U451 ASFIC_CMP 14GCB1 general purpose output0 15 GCB0 general purpose output3.00 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...
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June, 2005HKLN4216C 6-16VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals Notes: U480 Dual Opamp1 Unit 1 output 2.48 2Unit 1 (-) input2.48 3 Unit 1 (+) input 2.46 4GroundGND 5 Unit 2 (+) input 0.28 6Unit 2 (-) input0.29 7 Unit 2 output 0 8Vcc4.96 U490 Audio Power Amp1 Enable/shutdown 0.12 (Unsquelched) 2Bias reference3.26(Unsquelched) 3 (+) input 3.26 (Unsquelched) 4(-) input3.27(Unsquelched) 5 (-) output 3.25 (Unsquelched) 6Vcc7.48(Unsquelched) 7Ground GND 8(+)...