Nokia RH-30 Series Troubleshooting Instructions Download

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Troubleshooting diagram for GSM900 receiver

Phone in “Continuous” mode, AGC setting “12”

Figure 21: GSM900 receiver troubleshooting

Yes

Apply –90dBm
942.46771MHz signal
from generator to anten-
na connector

Oscilloscope at RX_I
Signal 700mVpp
DC offset 1.35V***
Frequency 67.7kHz

Change ge-
nerator level
to –50dBm

Spectrumanalyzer
Antenna Switch
outputs, GSM900
–88 dBm

Spectrumanalyzer
Antenna Switch
input
–84 dBm

Oscilloscope
VR1,3...6 2.7V
Check HELGA serial
interface
(burst mode)

Synthesiszer trou-
bleshooting

Spectrumanalyzer
4G VCO out
3769.6MHz

∼

–30 dBm (*

Oscilloscope
VANT_1...3 0V

Oscilloscope :
Check HELGA
serial interface
(burst mode)

Check HELGA
N500

Check Base-
band

* Spectrumanalyzer
reading with 1 kohm
passive probe (right val-
ue add +34 dB)

All spectrumanalyzer reading
values are measured with
2.5 kohm passive probe (use
tweezers to connect the
probe ground to the nearest
PWB ground). Reading value
is represented without
+34 dB compensation.

900RX chain
functional

Check C831,

L811

Check Antenna
switch
Z800

Spectrumanalyzer
HELGA inputs
GSM900
–89 dBm

Check L809
L810

Check Base-
band

Yes

Check HELGA
N500

* ** DC–level of RXI/RXQ in
continuous mode will decrease
slowly.
The original level can be resto-
red by rewriting gain set.

170

ICQ: 343183001 QQ: 35070846 Email: [email protected]

Summary of Contents for RH-30 Series

Page 1: ...Customer Care Solutions RH 30 31 Series Transceivers Issue 1 10 03 Nokia Corporation Troubleshooting Instructions ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 2: ...ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 3: ...leshooting 19 Troubleshooting diagram for GSM850 receiver 23 Troubleshooting diagram for GSM900 receiver 24 Troubleshooting diagram for GSM1800 receiver 25 Troubleshooting diagram for GSM1900 receiver 26 Synthesizer 27 General instructions for synthesizer troubleshooting 27 Pictures of synthesizer signals 29 Baseband troubleshooting 32 Main Troubleshooting Diagram 34 Phone is dead 35 Flash Program...

Page 4: ...RH 30 31 Company confidential CCS Technical Documentation Page 2 Nokia Corporation Issue 1 10 03 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 5: ...omponents described in this document here are a lot of discrete components resistors inductors and capacitors which troubleshooting is done by checking if soldering of the component is done properly for factory repairs checking if it is missing from PWB Capac itor can be checked for shortening and resistors for value by means of an ohmmeter but be aware in circuit measurements should be evaluated ...

Page 6: ...Figure 1 Component placement 1 Antenna switch PA VCO TX 850 900 saw 1900 1800 TX Balun 1900 RX balun 1900 RX Lna VCTCXO Helgo VCO Balun 1800 RX Saw 850 900 RX Saw 1900 RX Saw ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 7: ...n 1800 RX in 850 900 RX in VR 7 VR 6 VR 4 TXC VR 5 VPECTRL3 ALC TXQN QP RX 1900 saw out LNA P VANT_1 VANT_2 ASM out 1900Rx LNA VCC ASM In Tx850 900 VANT_3 VBATT VR2 RFBusEn RFBusClk RFBusRes RFBusData VR3 VR1 TXIN TXIP MODE I_ref_850 900 I_ref_1800 1900 TXP VTXLO 850 900 ASM In Tx1800 1900 ASM Out Rx 850 900 ASM out 1800Rx TXA ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 8: ...ment Attention Normally Spectrum analyzer maximum input power is 30dBm It is recommended to use 10dB attenuator on Spectrum analyzer input to prevent damage Set the phone module to test jig and start Phoenix service sofware Initialize connection to phone use FBUS driver when using DAU9S and COMBOX driver when using FPS 8 Select product from the menu File Choose product RH 30 RH 31 From toolbar set...

Page 9: ... level tuning and check tuned DAC values Highest level 670 850 GSM900 580 700 GSM1800 1900 Lowest level 170 200 GSM900 180 220 GSM1800 1900 Base level 140 170 GSM900 135 165 GSM1800 1900 Major differences Tune TX DAC values Check control voltage with oscilloscope PA Ctrl voltage 1 5V peak OK Check control loop components OK Replace Helgo PA ant switch troubleshooting Replace faulty components 32 3...

Page 10: ...C signals OK Baseband troubleshooting Check with RF probe 4G VCO signal output 3589 6MHz GSM900 3495 6MHz GSM1800 3760MHz GSM1900 Level 10dBm OK Synthesizer troubleshooting Check modulator output components OK Replace HELGO Replace faulty component s 3346 4MHz GSM850 3589 6MHz GSM900 3495 6MHz GSM1800 3760MHz GSM1900 Level 10dBm OK ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 11: ...loscope VANT1 GSM900 VANT2 GSM1800 VANT3 GSM1900 OK Replace ant switch Check with oscilloscope VBATT 4V VTXB 2 8V pulsed VPCTRL_900 1800 1900 OK Check VANT line components OK Replace PA Replace HELGO Replace faulty component s Check components around PA OK Replace faulty component s VPCTRL_850 900 1800 1900 OK VANT1 GSM850 900 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 12: ...GSM850 900 TX at C805 VANT_2 GSM1800 TX at R804 VANT_3 GSM1900 TX at C806 OV no signal Flatline on Oscilloscope screen VANT_1 VANT_2 VANT_3 VTXB_900 at C713 VTXB_850 at C 713 VTXB_1800_1900 at C714 TXP at J504 200mV div 100us div 1 200mV div 100us div 500mV div 100us div 500mV div 100us div 1 500mV div 100us div 500mV div MTB 100us div ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 13: ... Offset Ref Lvl 34 dBm Ref Lvl 34 dBm RF Att 40 dB Center 897 4 MHz Span 2 MHz 200 kHz RBW 100 kHz VBW 100 kHz SWT 2 s 60 50 40 30 20 10 0 10 20 30 66 34 1 Marker 1 T1 28 46 dBm 897 38997996 MHz Date 28 APR 2003 15 09 42 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 14: ...indow Select Band GSM850 GSM900 or GSM1800 or GSM1900 Default GSM900 RH 30 Default GSM850 RH 31 Set Active unit to Tx Default Rx Set Edge On Default Off Set Operation mode to Burst Default Burst Set Tx data type to Alternate PN9 Default All1 Set Rx Tx channel to 190 on GSM850 37 on GSM900 or 700 on GSM1800 or 661 on GSM1900 Defaults Set power level to 8 Default 19 on GSM850 and GSM900 or to 2 Defa...

Page 15: ...ck tuned DAC values Highest level 700 800 GSM900 630 730 GSM1800 1900 Lowest level 340 410 GSM900 250 360 GSM1800 1900 Base level 190 260 GSM900 150 250 GSM1800 1900 Major differences Tune TX DAC values Check control voltages with oscilloscope Pa Iref 2V peak GSM900 Pa Iref 2 1V peak GSM1800 1900 Mode 1 8V OK Check EDGE control loop components OK Replace Helgo PA ant switch EDGE troubleshooting Re...

Page 16: ... OK Baseband troubleshooting Check with RF probe 4G VCO signal output 3589 6MHz GSM900 3495 6MHz GSM1800 3760MHz GSM1900 Level 10dBm OK Synthesizer troubleshooting Check modulator output components and VPECTRL3 signal OK Replace HELGO Replace faulty component s 3346 4MHz GSM850 3589 6MHz GSM900 3495 6MHz GSM1800 3760MHz GSM1900 Level 10dBm OK ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 17: ...h oscilloscope VANT1 GSM900 VANT2 GSM1800 VANT3 GSM1900 OK Replace ant switch Check with oscilloscope VBATT 4V Iref _900 2V peak Iref_1800_1900 2 1V peak VTXB 2 8V pulsed Mode 1 8V OK Check VANT line components OK Replace PA Replace HELGO Replace faulty component s Check components around PA OK Replace faulty component s GSM850 900 GSM850 900 Iref_850 2V peak ICQ 343183001 QQ 35070846 Email Servic...

Page 18: ...Pictures of EDGE transmitter signals Figure 10 I_ref_850 900 power level 8 at R701 C701 Figure 11 VTXB 850 900 power level 8 at C713 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 19: ...Figure 12 I_ref_1800 1900 power level 2 at R700 C700 Figure 13 VTXB 1800 1900 power level 2 at C714 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 20: ...Figure 14 TXA 850 900 1800 1900 at C538 Figure 15 TXI TXQ signal at C535 C536 R516 R517 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 21: ...Figure 16 VPECTRL3 ALC signal at C512 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 22: ... from the menu Testing RF Controls From the RF controls window Select band GSM850 GSM 900 GSM 1800 or GSM1900 Default GSM900 RH 30 Default GSM850 RH 31 Set Active unit to Rx Default Rx Set Operation mode to Burst Default Burst For continuous mode Set Operation mode to Continuous Set AGC to 12 FEG_ON DTOS_ON BB_30 Vgain60 maximum gain setting used in normal mode Default 14 FEG_ON DTOS_ON BB_42 Vgai...

Page 23: ...gnal input level 90dBm at RF connector Correct signal amplitudes approximately GSM850 170mVpp GSM900 170mVpp GSM1800 140mVpp GSM1900 160mVpp Signal part frequency 67 7kHz sine DC level of signal part is 1 35V DC level can variate about 100mV between I and Q signals and between different bands as well ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 24: ...tor Trace2 With wider time scaling both monitoring and own RX bursts are seen 1st burst shorter is monitoring and 2nd burst longer is own RX burst Trace1 External LNA VCC supply voltage at burst mode input level 90 dBm Measured from testpoint LNA_VCC Figure 19 RX I Q phase difference 90 deg between signals ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 25: ...red from testpoints RXI and RXQ simultaneously Used channel 37 input signal 942 46771 MHz level 90 dBm at antenna port AGC setting 12 Phase difference should be 90 degrees between RX I and Q signals at all bands ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 26: ... 6MHz 30 dBm Oscilloscope VANT_1 3 0V Oscilloscope Check HELGA serial interface burst mode Check HELGA N500 Check Base band Spectrumanalyzer reading with 1 kohm passive probe right val ue add 34 dB All spectrumanalyzer reading values are measured with 2 5 kohm passive probe use tweezers to connect the probe ground to the nearest PWB ground Reading value is represented without 34 dB compensation 90...

Page 27: ...O out 3769 6MHz 30 dBm Oscilloscope VANT_1 3 0V Oscilloscope Check HELGA serial interface burst mode Check HELGA N500 Check Base band Spectrumanalyzer reading with 1 kohm passive probe right val ue add 34 dB All spectrumanalyzer reading values are measured with 2 5 kohm passive probe use tweezers to connect the probe ground to the nearest PWB ground Reading value is represented without 34 dB compe...

Page 28: ...V801 Oscilloscope VANT_1 3 0V Oscilloscope Check HELGA se rial interface burst mode Check HELGA N600 Check Base band Spectrumanalyzer reading with 1 kohm passive probe right val ue add 26 dB All spectrumanalyzer reading values are measured with 1 kohm passive probe use tweezers to connect the probe ground to the nearest PWB ground Reading value is represented without 26 dB compensation Check C831 ...

Page 29: ...passive probe right val ue add 26 dB All spectrumanalyzer reading values are measured with 1 kohm passive probe use tweezers to connect the probe ground to the nearest PWB ground Reading value is represented without 26 dB compensation Spectrumanalyzer Antenna Switch input 84 dBm Spectrumanalyzer HELGA inputs GSM1900 78 dBm Check Antenna switch Z800 Spectrumanalyzer RX_SAW_out 90 dBm Check Baseband...

Page 30: ...rt Phoenix service sofware Initialize connection to phone use FBUS driver when using DAU 9S and COMBOX driver when using FPS 8 Select product from the menu File Choose product RH 30 RH 31 From toolbar set operating mode to Local Activate RF controls window from the menu Testing RF Controls From the RF controls window Select band GSM850 GSM900 GSM 1800 or GSM1900 Default GSM900 RH 30 Default GSM850...

Page 31: ...eck balun output levels and solder joints OK Check output signal on 1 GHz span Signal found on incorrect frequency Check with oscilloscope 4G VCO Vcc 2 7V OK Baseband troubleshooting Check with oscilloscope Check with oscilloscope VCO control voltage VCO control voltage from VCO pin from VCO pin 0V 4 0 V Replace VCO Check balun output levels and solder joints OK Check VCO control loop components O...

Page 32: ...Pictures of synthesizer signals Figure 25 26MHz at G501 pin out Figure 26 26MHz RFCLK at R420 C420 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 33: ...Figure 27 1800 TX channel 512 burst mode Figure 28 1900 RX channel 810 continuous mode ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 34: ...BW 10 kHz SWT 25 ms VBW 10 kHz Ref Lvl 12 dBm Ref Lvl 12 dBm RF Att 10 dB 100 kHz Center 3 6856 GHz Span 1 MHz 1VIEW 1MA 100 90 80 70 60 50 40 30 20 112 12 1 Marker 1 T1 15 59 dBm 3 68560301 GHz Date 29 APR 2003 13 41 26 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 35: ...xD J128 J125 FbusRx J105 J103 J104 J124 sclk Mbus J121 STI Clk J126 FbusTx J122 STI RxD J480 JTMS J184 JTRst J482 JTDI J483 VCC VIO J484 JTDO J485 JTclk_ret J486 JTclk J487 EMU0 J488 EMU1 J489 GND J402 PURX J403 SLEEPX ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 36: ... J511 J414 J404 J407 J408 J409 J410 J412 J411 J406 J405 J415 J413 J303 J302 J308 J300 J301 J306 J305 J307 J304 J100 VBAT J101 BSI J386 SIM I O J153 J101 BTEMP VSIM VIO VFLASH1 VANA VCORE VR1A VR6 VR4 VR2 VR7 VR3 VR5 VLED J153 VOUT GND SLEEPCLK ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 37: ...Main Troubleshooting Diagram Figure 2 Baseband general troubleshooting ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 38: ...all VBATT lines Yes Check BSI line including X100 C100 C240 R202 and R206 Are they OK End Yes No Change UEM Yes Is flash programming working OK Yes Phone current 50 mA No No Change X100 No Phone current 54 mA Phone is jammed Yes Yes Flash fault No No Is phone in LOCAL mode Change defect part No No Yes Yes R310 and R206 Are they OK ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 39: ...V Check R104 If OK change UEM Yes End retest No No Is FBUSTX line set to LOW after it has been HIGH Yes Yes Check BSI line including X100 C100 C240 R202 and R206 No Wrong manufactor ID and device ID Is phone totally dead No No Change UPP Yes No Change Flash Yes Phone is dead Phone is jammed Phone doesn t start up or it s jammed Yes Yes No R310 and R206 Change UEM ICQ 343183001 QQ 35070846 Email Se...

Page 40: ...ignal from testpoint J402 Is it HIGH 1 8V Measure 26MHz RFCLK from G501 Is it OK Measure 32kHz SleepClkfrom B200 Is it OK Check VBATT1 6 VIO VCORE VFLASH1 VANA VR3 lines Are they OK Phone is jammed 2 Check BSI BTEMP lines If OK change UEM Check B200 C209 C210 Change UEM Check G501 R520 C540 If OK change G501 Check R420 C420 If OK change N500 Change UEM No Yes No Yes No Yes No Yes No Yes No Yes No ...

Page 41: ...from testpoint J406 Is it OK Measure FBUSRx signal during phone info read from testpoint J412 Is it OK Measure FBUSTx signal during phone info read from testpoint J411 Is it OK Change UPP Change UPP Change UEM Change wv8 module or retest Yes No No Yes No No Yes Yes No Change UEM No Yes Retest Yes Phone is jammed 2 ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 42: ...3 0V Check VSIM line X386 C390 R386 C203 If OK change R388 If still fail change UEM Yes End No Yes Check BSI line including X100 C100 C240 R202 and R206 If OK change UEM No Change UPP Check SIM power up sequence Is it OK Yes Check SIM lines X386 If OK change R388 If still fail change UEM No Yes No R388 R206 R310 If OK change UEM ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 43: ... and line If OK change Z300 If still FAIL change UPP Measure COL0 from S300 when pressed Is there 50us pulse Check S300 and COL0 line If OK change Z300 If still FAIL change UPP No No Yes Change UPP Yes No Is the volume Down key working Measure ROW1 line from S301 Is it 1 8V Check S301 and line If OK change Z300 If still FAIL change UPP Measure COL0 from S301 when pressed Is there 50us pulse Check ...

Page 44: ... OK Check lines ROW0 ROW4 from X301 If OK change Z300 If still fails change UPP Illumination fault Measure ROW0 Row4 lines from X301 Are voltage level 1 8V No No Yes Measure SLEEPX signal from testpoint J403 when key is pressed Is voltage level 1 8V Yes When keypad is pressed are the LED s turned on Yes No No End Change X301 No Yes No Yes ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 45: ...re RESX J306 and CSX J304 signals Are voltage levels 1 8V Yes Measure SDA J305 and SCLK J307 signals Are voltage levels 1 8V Yes End Yes No Check X302 and lines again If OK change UPP No Check X302 and lines again If OK change UEM No Check X302 R308 R309 and lines If OK change UPP No Are the display LED s working when key is pressed or enabled by Phoenix SW Yes No Yes Measure VDD J300 2 7V and VDD...

Page 46: ...eybar LEDs and or Flashlight working Change X302 Check X302 connector contacts and solder joints Are they OK Change display Are the LEDs working now No VLED No Yes No No KB LED Retest failing display Yes Check V314 V313 R314 R313 If not OK change defect part Yes ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 47: ...ashlight working Change X301 Check X301 connector contacts and solder joints Are they OK Change UI PWB Are the LEDs working now No VLED No Yes No No Flashlight Retest failing UI PWB Check V311 V312 R311 R312 and R307 If not OK change defect part Yes KB LED Yes ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 48: ...Start Are the Flashlight LEDs working Are the display LEDs and or keyboard LEDs working Check V318 V319 V317 V320 No VLED No Yes Flashlight Flashlight R316 and R318 If not OK change defect part ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 49: ...D driver is enabled Is this OK VLED Retest Note that VLED VBAT when LED driver is disable Yes Check N300 L300 V300 R301 R315 R317 R325 C302 C305 and C304 If not OK change defect part Note that C311 and V31 are not mounted No ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 50: ...0 390mA with ACP 7 Change defect part re calibrate charge current voltage Retest Yes Yes Yes Check X102 F100 L100 V100 C106 C110 and line No Check X100 C100 R202 R207 C220 and line Are they OK No Re calibrate BTEMP with Phoenix SW Retest Yes Change defect part re calibrate and retest No Check R200 Is it OK No Yes No Change defect part if any re calibrate charge current voltage Retest R304 and line...

Page 51: ...ings or check contact plates if dirty Retest No Retest Measure ACI line pin3 Is it 0 83 1 13V Check ACI line L106 R103 R102 R109 C103 If not OK change defect part and retest No Yes Yes Yes ACI Accessory Non ACI Accessory Measure VOUT voltage pin4 Is it 0V Check that regulator N100 enable pin is LOW state If not OK check ACI line again No Retest Measure ACI line pin3 Is it 0V Check ACI line L106 R1...

Page 52: ...nge old UI module back Set phone to LOCAL mode Using Phoenix Audiotest set EXT IN HP OUT LOOP ON Check L150 C155 R151 R152 and line If OK change UEM Check L102 C116 C150 R153 C159 R158 and line If OK change UEM Check earpiece contact springs from old UI module and change earpiece and foam to old UI module Retest Audio faults 2 Earpiece 2 No Yes No No No Yes Yes Yes R172 R158 and line If OK change ...

Page 53: ...880mVpp Connect EXT audio signal 1kHz sine 200mVpp between XMICP and XMICN pads X101 9 10 Measure sine signal to UEM R155 Is it 130mVpp Check C154 If OK change UEM Check C154 R155 C156 R154 C159 R158 R159 and lines Change UPP Retest No Yes Yes No ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 54: ...g Phoenix Audiotest set HP IN EXT OUT LOOP ON Check L101 C151 C152 C153 R156 R157 If OK change UEM Check mic contact springs from old UI module If not OK replace microphone in old UI module with new one Retest No Yes No No Audio faults 3 Check C151 R157 C153 and line If OK change UEM if still fail change UPP Yes Yes Is microphone working ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 55: ...F pads J156 J157 Is it 1 0Vrms IHF speaker or contact springs fault Retest Check signal in C161 Is it OK Check IHF PA controls on J152 J153 J154 Is it OK No Yes No Speaker contact springs faults Retest Change UPP Change IHF PA N150 Yes No Yes Check C161 C160 R163 C169 C170 R170 C171 If OK then change UEM No Check C160 C161 C169 C166 R163 L151 L152 C164 and IHF PA output lines Retest Yes No END Yes...

Page 56: ...Camera Troubleshooting Figure 21 Component placement Camera J972 CSX J970 CLK J973 CE J971 TxDa VFLASH2 VCAMDIG ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 57: ...Camera Fault Camera troubleshooting diagram 2 8V VFLASH2 from C970 and 1 8V VCAMDIG from C983 Are they OK Check 2 8V VFLASH2 from FM radio block ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 58: ...FM Radio troubleshooting Figure 22 FM Radio Component layout Figure 23 FM radio block layout J356 FMCtrlDa J357 FMCtrlClk J358 FMWrEn J359 FMClk ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 59: ...FM Radio troubleshooting diagram Use 1MHz 1X probe when measuring Audio and clock signals with oscilloscope Use active RF probe when measuring frequencies with spectrum analyzer Note 1 RF test signal parameters Amplitude A 67 0 dBm Carrier frequency fc 98 000 MHz Deviation f 75 kHz Modulating frequency fm 1 000 kHz RF generator internal FM stereo mode R L pilot state ON ICQ 343183001 QQ 35070846 E...

Page 60: ...or to 87 5 and 108 0 MHz Measure Audio from C162 and C163 Are both cases 1 kHz 0 5 0 8 Vp p Check V356 V357 L356 L357 C357 C358 C362 R359 R360 Test again with 87 5 and 108 0 MHz Measure audio from C162 and C163 Both OK Check C107 C108 C109 C117 L105 C367 C378 C379 L358 Measure signal from C162 C163 Is it 1kHz 0 5 0 8 Vp p Check R359 R360 V356 V357 L356 L357 C357 C358 C362 Measure signal from J103 ...

Page 61: ...s J103 and J104 with FM test signal volume 100 Signal 2 Audio output from FM radio pins 22 and 23 same as in C162 and C163 with FM test signa Figure 26 FM radio clock from test point J359 32 kHz frequency clock signal when radio is on l ICQ 343183001 QQ 35070846 Email Serviceic yahoo com cn ...

Page 62: ...CENTER 98 0000 MHz SPAN 300 0 kHz 71 03 dBm MKR 97 9280 MHz PEAK WA SB SC FS CORR 15 51 49 03 JUL 2002 SWEEP CONT SGL FREE RUN VIDEO LINE EXTERNAL SYNC CRD TV TRIG RES BW 10 kHz VBW 10 kHz SWP 20 0 msec AT 10 dB REF 0 dBm LOG 10 dB CENTER 196 450 MHz SPAN 1 000 MHz 9 40 dB MKR 196 440 MHz MEAS UNCAL PEAK WA SB SC FS CORR 10 46 24 03 JUL 2002 SWEEP CONT SGL FREE RUN VIDEO LINE EXTERNAL SYNC CRD TV ...

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