Nokia RH-30 Series Troubleshooting Instructions
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Nokia RH-30 Series Troubleshooting Instructions

Nokia RH-30 Series Troubleshooting Instructions

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

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  • Page 1 Customer Care Solutions RH-30/31 Series Transceivers ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Troubleshooting Instructions Nokia Corporation Issue 1 10/03...
  • Page 2 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn...

  • Page 3: Table Of Contents

    Accessory Fault ......................48 Audio Fault ........................49 Camera Troubleshooting....................53 Camera Fault ......................54 Camera troubleshooting diagram ................. 54 FM Radio troubleshooting ................... 55 FM Radio troubleshooting diagram................56 Notes to "FM Radio troubleshooting diagram"............56 Nokia Corporation. Issue 1 10/03 Page 1...

  • Page 4: Company Confidential

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

  • Page 5: Rf Troubleshooting

    RF Troubleshooting Introduction to RF troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Measurements should be done using Spectrum analyzer with high-frequency high-impedance passive probe (LO-/reference frequencies and RF power levels) and Oscilloscope with a 10:1 probe (DC-voltages and low frequency signals). The RF-section is build around one RF-ASIC (HELGO N500).

  • Page 6: Rf Key Component Placement

    RF Key component placement Figure 1: Component placement 1 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Antenna switch 1900 RX Saw 1900/1800 TX Balun 1900 RX Lna 1900 RX balun TX 850/900 saw 1800 RX Saw 850/900 RX Saw Helgo VCTCXO VCO Balun...

  • Page 7: Rf Measurement Points

    RF Measurement points Figure 2: Component placement 2 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn ASM out 1900Rx To Antenna VBATT RX 1900 saw out VANT_2 1800/1900 PA in LNA P VTXB 1800/1900 Pcrtl 1800/1900 ASM Out Rx 850/900 LNA VCC MODE VANT_3 Vpcrtl 850/900...

  • Page 8: Gsm 850, Gsm900, Gsm1800 & Gsm1900 Transmitter

    GSM 850, GSM900, GSM1800 & GSM1900 Transmitter General instructions for Tx troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Kindly refer to the Service Software Section, Service Concept dagram (p.40) Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 mod- ular cable.

  • Page 9: Transmitter Troubleshooting Diagram

    Transmitter troubleshooting diagram Figure 3: Transmitter troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn TX OK TX Troubleshooting Tune Check output signal level: Check TX power +32...+33dBm@836.6MHz (GSM850) +32…+33dBm@897.4MHz(GSM900) all power levels, +29…+30dBm@1747.8 and 1880MHz levels, +32...+33dBm@897.4MHz (GSM900) (GSM1800&1900) +29...+30dBm@1747.8MHz and 1880MHz (GSM1800 and 1900) Check output signal on 500MHz span...
  • Page 10 Figure 4: HELGO IC troubleshooting Helgo ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn troubleshooting Check with oscilloscope: -TXI/TXQ signals Baseband -VR1, VR2, VR4, VR5, VR6 =2.8V troubleshooting -VrefRF01 = 1.35V -Helgo serial interface -TXP & TXC signals Check with RF probe: 4G VCO signal output: -3589.6MHz (GSM900) Synthesizer...
  • Page 11 Figure 5: PA and Antenna Switch troubleshooting PA & ant switch ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn troubleshooting Check with RF probe signal level on PA Check with oscilloscope: -VANT1 (GSM850/900 input >= 0dBm -VANT1 (GSM900) Replace ant. -VANT2 (GSM1800) switch -VANT3 (GSM1900) Check with oscilloscope:...

  • Page 12: Pictures Of Transmitter Signals

    Pictures of transmitter signals ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn 200mV/div 100us/div 200mV/div 100us/div TX I/Q at R516/517 power level high Ran- VPCTRL _850/900 power level high at R703/C703 VPCTRL_1800/1900 power level high at R704/C704 dom data 500mV/div 100us/div 500mV/div 100us/div VANT_1 / GSM850/900 TX at C805 VANT_1,VANT_2,VANT_3...
  • Page 13 Figure 6: Tx out signal, 900 band, burst mode, channel 37 Marker 1 [T1] 100 kHz RF Att 40 dB Ref Lvl Ref Lvl 28.46 dBm 100 kHz ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn 34 dBm 34 dBm 897.38997996 MHz Unit 21 dB Offset Center 897.4 MHz...

  • Page 14: Additional Information For Edge Troubleshooting

    Additional information for EDGE troubleshooting EDGE mode troubleshooting differs slightly from basic GSM troubleshooting. ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Establish connection to the phone normally (see GSM850/900/1800/1900 troubleshooting in- structions). Select product from the menu: File -> Choose Product -> RH-30/RH-31 From toolbar set operating mode to “Local”...
  • Page 15 Figure 7: Transmitter EDGE troubleshooting TX OK TX EDGE Troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Tune Check output signal level: Check TX power +24...+30dBm@836.6MHz(GSM850) +24…+30dBm@897.4MHz(GSM900) all power levels, +22…+29dBm@1747.8 and 1880MHz levels, +24...30dBm@897.4MHz(GSM900) (GSM1800&1900) +22...+29dBm@1747.8and 1880MHz (GSM1800/1900) Check output signal on 500MHz span Synthesizer TX signal found?
  • Page 16 Figure 8: Helgo EDGE troubleshooting Helgo EDGE ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn troubleshooting Check with oscilloscope: -TXI/TXQ signals Baseband -VR1, VR2, VR4, VR5, VR6 =2.8V troubleshooting -VrefRF01 = 1.35V -Helgo serial interface -TXP & TXC & TXA Check with RF probe: 4G VCO signal output: -3346.4MHz(GSM850) -3589.6MHz (GSM900)
  • Page 17 Figure 9: Pa & ant switch EDGE troubleshooting PA & ant switch ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn EDGE troubleshooting Check with RF probe signal level on PA Check with oscilloscope: (GSM850/900) input: -VANT1 (GSM900) Replace ant. (GSM850&900) ~ -8dBm@PCL=8 (GSM900) -VANT2 (GSM1800) switch ~ -10dBm@PCL=2 (GSM1800&1900)

  • Page 18: Pictures Of Edge Transmitter Signals

    Pictures of EDGE transmitter signals Figure 10: I_ref_850/900 power level 8 at R701/C701 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Figure 11: VTXB 850/900 power level 8 at C713...
  • Page 19 Figure 12: I_ref_1800/1900 power level 2 at R700/C700 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Figure 13: VTXB 1800/1900 power level 2 at C714...
  • Page 20 Figure 14: TXA 850/900/1800/1900 at C538 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Figure 15: TXI/TXQ signal at C535/C536/R516/R517...
  • Page 21 Figure 16: VPECTRL3 (ALC) signal at C512 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn...

  • Page 22: Gsm 850, Gsm900, Gsm1800 And Gsm1900 Receiver

    GSM 850, GSM900, GSM1800 and GSM1900 Receiver General instructions for Rx troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 mod- ular cable. Make sure that you have PKD-1 dongle connected to computers parallel port. Connect DC power supply to module test jig with FLC-2 cable.
  • Page 23 RX I/Q signal ,burst mode, input level –90dBm. Figure 17: ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Receiver I or Q burst mode signal (channel 37) measured from testpoint RXI or RXQ with 942.46771 MHz signal, input level –90dBm at RF-connector. Correct signal amplitudes approximately: •...
  • Page 24 Figure 18: GSM1900 RX I or Q signal (trace2), burst mode. ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn GSM1900 receiver burst mode I or Q signal at ch 661 with input signal 1960.067MHz, level – 90 dBm at RF-connector. Trace2: With wider time scaling both monitoring and own RX bursts are seen, 1 burst (shorter) is monitoring and 2 burst (longer) is own RX burst.
  • Page 25 Detailed view of GSM900 continuous mode RX I and Q signals measured from testpoints RXI and RXQ simultaneously. Used channel 37, input signal 942.46771 MHz, level –90 dBm at antenna port, AGC setting 12. ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Phase difference should be 90 degrees between RX I and Q signals at all bands.

  • Page 26: Troubleshooting Diagram For Gsm850 Receiver

    Troubleshooting diagram for GSM850 receiver Phone in “Continuous” mode, AGC setting “12” Figure 20: GSM850 receiver troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Apply –90dBm 881,66771 942.46771MHz signal from generator to anten- na connector Oscilloscope at RX_I Change ge- Spectrumanalyzer Spectrumanalyzer Check C831, Signal 700mVpp...

  • Page 27: Troubleshooting Diagram For Gsm900 Receiver

    Troubleshooting diagram for GSM900 receiver Phone in “Continuous” mode, AGC setting “12” Figure 21: GSM900 receiver troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Apply –90dBm 942.46771MHz signal from generator to anten- na connector Oscilloscope at RX_I Change ge- Spectrumanalyzer Spectrumanalyzer Check C831, Signal 700mVpp Antenna Switch...

  • Page 28: Troubleshooting Diagram For Gsm1800 Receiver

    Troubleshooting diagram for GSM1800 receiver Phone in “Continuous” mode, AGC setting “12 Figure 22: GSM1800 receiver troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Apply –90dBm 1842.86771MHz signal from generator to anten- na connector Oscilloscope at RX_I Change ge- Spectrumanalyzer Spectrumanalyzer Check C831, Signal 140mVpp Antenna Swithc input...

  • Page 29: Troubleshooting Diagram For Gsm1900 Receiver

    Troubleshooting diagram for GSM1900 receiver Phone in “Continuous” mode, AGC setting “12 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Figure 23: GSM1900 receiver troubleshooting Apply –90dBm 1960,06771 1842.86771MHz signal from generator to anten- na connector Spectrumanalyzer Oscilloscope at Change ge- Spectrumanalyzer Check C831, Antenna Switch input RX_I /RXQ...

  • Page 30: Synthesizer

    Synthesizer General instructions for synthesizer troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 mod- ular cable. Make sure that you have PKD-1 dongle connected to computers parallel port. Connect DC power supply or FPS-8 to module test jig with PCS-1 cable.
  • Page 31 Figure 24: Synthesizer troubleshooting diagram Synthesizer ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn troubleshooting *(When 2.5kOhm passive probe is used, correct the measurement by +34 dB Set with RF controls: Active Unti = Rx Synthesizer Operation mode = Continuous Check with RF probe: -4G VCO out signal -3346.4MHz(GSM850) - 3589.6 MHz (GSM900)

  • Page 32: Pictures Of Synthesizer Signals

    Pictures of synthesizer signals Figure 25: 26MHz at G501 pin out ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Figure 26: 26MHz RFCLK at R420/C420...
  • Page 33 Figure 27: 1800 TX, channel 512, burst mode ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Figure 28: 1900 RX, channel 810, continuous mode...
  • Page 34 Figure 29: VCO output, 1800 band, ch700, RX on, continuous output Marker 1 [T1] 10 kHz RF Att 10 dB Ref Lvl Ref Lvl -15.59 dBm 10 kHz ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn -12 dBm -12 dBm 3.68560301 GHz 25 ms Unit 1VIEW...

  • Page 35: Baseband Troubleshooting

    Baseband troubleshooting Figure 1: Basic baseband test points ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn J480 (JTMS) J184 (JTRst) J482 (JTDI) J483 (VCC VIO) J484 (JTDO) J485 (JTclk_ret) J486 (JTclk) J487 (EMU0) J488 (EMU1) J489 (GND) J402 (PURX) J124 (sclk/Mbus) J128 J122 (STI RxD J121 (STI Clk) J120 (STI TxD)
  • Page 36 J100 (VBAT) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn J101 (BSI) J101 (BTEMP) J304 J510 J300 J307 J308 J511 J305 J302 J306 J303 J154 J301 J420 J418 J417 VLED J419 J416 RFClk J414 J413 VR1A J405 J404 J415 VCORE J406 J407 J411 VANA J408...

  • Page 37: Main Troubleshooting Diagram

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

  • Page 38: Phone Is Dead

    Phone is dead Figure 3: Dead phone troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Check X100 Is phone current (contacts, Change X100 0 mA? solderings). Is it Check L260 - L265 and C260 - Change defect C265. Are they ones Check all VBATT-lines...

  • Page 39: Flash Programming Fault

    Flash Programming Fault Figure 4: Flash programming troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Measure BSI-pulse Check BSI-line including Is the FBUS during Flash X100,C100,C240,R202 TX-line HIGH operation. Is it OK? after startup? and R206. R310 and R206 Measure FBUSTX-line Check R104.

  • Page 40: Phone Is Jammed

    Phone is jammed Figure 5: Jammed phone troubleshooting (1) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Phone is jammed Check L260-265, Check VBATT1-6 Measure VIO, VCORE, C260-265, VIO,VCORE,VFLASH1,VANA, VFLASH1, VANA, BSI/BTEMP lines and VR3 lines. VR3 voltages. VBATT lines Are they OK ? Are they OK ? Check BSI/BTEMP lines.
  • Page 41 Figure 6: Jammed phone troubleshooting (2) Phone is ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn jammed Measure Phone Shutdown watchdog signal Change after 30s CBUSDA from J414. Is it OK ? Retest Measure CBUSClk 1MHz signal from testpoint J406. Is it OK ? Measure FBUSRx Read phone info.

  • Page 42: Sim Card Fault (Insert Sim / Card Rejected)

    SIM card fault (Insert SIM / Card rejected) Figure 7: SIM card troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Check BSI-line including Insert SIMor Set phone to LOCAL Card rejected X100,C100,C240,R202 and mode. Is it OK? R206, R310. If ,change R206.

  • Page 43: Keypad Fault

    Keypad Fault Figure 8: Keypad troubleshooting (1) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Check Measure voltage R305, Is the power key R306,C310,S30 from S302. Is it working? 2 and line. If OK, HIGH? change UEM Phone is Measure voltage dead Check S302.
  • Page 44 Figure 9: Keypad troubleshooting (2) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Continue Try to change UI Is the UI-module PWB. Are the Retest failing keys working? keys working UI-module now? Check X301 (solder Change X301 joints and spring contacts). Is it OK? Measure ROW0 - Row4 lines from X301.

  • Page 45: Display Fault

    Display Fault Figure 10: Display troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Try to change Retest failing Does the display UI-module. Is UI-module start? the display working now? Check X302 (solder joints). Is Change X302 it OK? Measure VDD (J300) (2.7V) Check X302 and Measure VDD (2.7V) and VDDI (J301) (1.8V).

  • Page 46: Illumination Fault

    Illumination fault Figure 11: Illumination fault troubleshooting 1 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Start Are the keybar LEDs Are the display VLED and/or Flashlight LEDs working? working? KB LED Change display. Retest failing display Yes Are the LEDs working now? Check X302 connector Check V314,V313, contacts and solder...
  • Page 47 Figure 12: Illumination fault troubleshooting 2 Start KB LED ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Are the display LEDs Are the keyboard VLED and/or Flashlight LEDs working? working? Flashlight Change UI PWB Retest failing UI PWB Are the LEDs working now? Check X301 connector Check V311,V312, contacts and solder...
  • Page 48 Figure 13: Illumination fault troubleshooting 3 Start Flashlight ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Are the display LEDs Are the Flashlight VLED and/or keyboard LEDs LEDs working? working? Flashlight Check V318,V319,V317,V320, R316 and R318 If not OK, change defect part...
  • Page 49 Figure 14: Illumination fault troubleshooting 4 Start VLED ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Measure VLED=~8.4V when LED driver is enabled. Is this OK? (Note that VLED=VBAT when LED driver is disable!) Retest Check N300, L300, V300,R301,R315, R317, R325,C302, C305, and C304. (Note that C311 and V31 are not mounted!) If not OK, change defect part...

  • Page 50: Charger Fault

    Charger Fault Figure 15: Charging troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Battery bars are Retest working (scroll) Measure voltage Check X102, F100, Change defect part (if over V100 L100, V100, C106, C110 any), re-calibrate charge (TVS). and line. current/voltage.

  • Page 51: Accessory Fault

    Accessory Fault Figure 16: Accessory troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Check system Is accessory detected Repair solderings or check contact connector X101 when connected to (solder ings, contact plates if dirty. Retest. system connector? plates). Is it OK? ACI-Accessory Measure ACI-line Check ACI- line (L106,R103,R102,R109,C103).

  • Page 52: Audio Fault

    Audio Fault Figure 17: Audio troubleshooting (1) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Audio faults Check earpiece contact springs from Try to change old UI-module and Is earpiece UI- module. Is it working change earpiece and working ? now ? foam to old UI- module.
  • Page 53 Figure 18: Audio troubleshooting (2) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Earpiece Connect EXT audio signal 1kHz (sine, 200mVpp) between XMICP and XMICN pads (X101, 9/10) Measure sine Measure sine signal from earpiece Check C154. If OK signal to UEM (R155). pads (J310,J311).
  • Page 54 Figure 19: Audio troubleshooting (3) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Audio faults Check mic contact springs Try to change new from old UI module. Is microphone UI-module. Is it working If not OK replace working ? now ? microphone in old UI module with new one.
  • Page 55 Figure 20: Audio troubleshooting (4) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Audio faults IHF speaker or Try to change new C- contact springs IHF speaker cover assembly. Is it fault. working ? working now? Retest. Restore old C-cover. Set phone to local mode with Phoenix. Set buzzer ON, vol "9"...

  • Page 56: Camera Troubleshooting

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

  • Page 57: Camera Fault

    Camera Fault Camera troubleshooting diagram ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn 2.8V (VFLASH2) from C970 and 1.8V Check 2.8V (VFLASH2) from FM-radio block (VCAMDIG) from C983. Are they OK?

  • Page 58: Fm Radio Troubleshooting

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

  • Page 59: Fm Radio Troubleshooting Diagram

    Components L103, L104, L105, C107, C108, C109, C117, C162, C163, R164, R165, R166 and R167 are not shown in the picture. Those components are placed in baseband section, near audio amplifier N150. ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn FM Radio troubleshooting diagram Notes to "FM Radio troubleshooting diagram"...
  • Page 60 87.5 and 108.0 MHz. Measure audio from C162 and C163. Both OK ? Change N356. Measure signal from J103 and J104. Is it OK ? E Nokia Corporation Change OK, RETEST IN FLALI radio module TB4 Diagrams of FM radio signals...
  • Page 61 Figure 25: Oscilloscope screen shot, Audio output ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Signal 1: Audio output from PWB test points 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...
  • Page 62 Figure 27: FM frequency from FM radio pin 37, the other end of L358, with FM test signal 15:51:49 03 JUL 2002 MKR 97.9280 MHz REF -20.0 dBm #AT 0 dB -71.03 dBm SWEEP ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn PEAK CONT SGL FREE RUN...
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