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Customer Care Solutions

RH-20 Series Transceivers

Issue 1 10/2003 Nokia Corporation

Troubleshooting Instructions

Summary of content (60 pages)

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Customer Care Solutions RH-20 Series Transceivers Troubleshooting Instructions Issue 1 10/2003 Nokia Corporation
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RH-20 Company confidential Troubleshooting Instructions Page 2 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation RF Troubleshooting .......................................................................................................5 Introduction to RF troubleshooting .............................................................................5 RF Key component placement .....................................................................................6 RF Measurement points .................................................................................
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Company confidential RH-20 CCS Technical Documentation RF Troubleshooting Introduction to RF troubleshooting Measurements should be done using Spectrum analyzer with high-frequency highimpedance 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). For easier troubleshooting, this RF troubleshooting document is divided into sections.
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RH-20 Company confidential CCS Technical Documentation RF Key component placement Figure 1: Component placement 1 Antenna switch 1900 RX Saw 1900/1800 TX Balun 1900 RX Lna PA 1900 RX balun TX 900 saw 1800 RX Saw 900 RX Saw Helgo VCO VCTCXO VCO Balun Page 6 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation RF Measurement points Figure 2: Component placement 2 To Antenna VBATT ASM out 1900Rx RX 1900 saw out VANT_2 1800/1900 PA in LNA P VTXB 1800/1900 Pcrtl 1800/1900 ASM Out Rx 900 MODE LNA VCC VANT_3 Vpcrtl 900 ASM out 1800Rx VTXB 900 VANT_1 900 PA in ASM In Tx1800/1900 ASM In Tx900 VPECTRL3(ALC) I_ref_1800/1900 I_ref_900 VR2 RFBusEn VTXLO 900 RFBusData 1900 RX in RFBusRes 1800 RX in RFBusClk VR 4 VR1 900 RX in VR 6 TXA VR3 VCTCX
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RH-20 Company confidential CCS Technical Documentation EGSM900, GSM1800 & GSM1900 Transmitter General instructions for Tx troubleshooting 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 modular 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.
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Company confidential RH-20 CCS Technical Documentation GSM1900 (Defaults) - Set Tx PA mode to "Free" (Default) - Set power level to 5 (Default = 19) on GSM900 or to 0 (Default = 15) on GSM1800 or GSM1900 Issue 1 10/2003 Nokia Corporation.
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RH-20 Company confidential CCS Technical Documentation Transmitter troubleshooting diagram Figure 3: Transmitter troubleshooting TX OK TX Troubleshooting Yes Check output signal level: +32…+33dBm@897.4MHz(GSM900) +29…+30dBm@1747.
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Company confidential RH-20 CCS Technical Documentation Figure 4: HELGO IC troubleshooting HELGO IC troubleshooting Check with oscilloscope: -TXI/TXQ signals -VR1, VR2, VR4, VR5, VR6 =2.8V -VrefRF01 = 1.35V -Helgo serial interface -TXP & TXC signals OK? No Baseband troubleshooting Yes Check with RF probe: 4G VCO signal output: -3589.6MHz (GSM900) -3495.
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RH-20 Company confidential CCS Technical Documentation Figure 5: PA and Antenna Switch troubleshooting PA & Antenna Switch troubleshooting Check with RF probe signal level on PA input ~ -1…+5 dBm OK? Yes Check with oscilloscope: -VANT1 (GSM900) -VANT2 (GSM1800) -VANT3 (GSM1900) OK? Yes Yes Replace ant. switch No Check with oscilloscope: -VBATT ~4V -VTXB = 2.
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Company confidential RH-20 CCS Technical Documentation Pictures of transmitter signals Figure 6: Transmitter signals TXI VPC 1 200mV/div 100us/div 200mV/div VPCTRL _900 power level high at R703/C703 VPCTRL_1800/1900 power level high at R704/C704_ TX I/Q at R516/517 power level high Random data 1 500mV/div VTXB_900 at C713 VTXB_1800_1900 at C714 100us/div VANT_1,VANT_2,VANT_3 500mV/div 500mV/div 100us/div Issue 1 10/2003 500mV/div 100us/div VANT_1 / GSM900 TX at C805 VANT_2 / GSM1800 TX at
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RH-20 Company confidential CCS Technical Documentation Figure 7: Tx out signal, 900 band, burst mode, channel 37 Marker 1 [T1] RBW 100 kHz Ref Lvl 28.46 dBm VBW 100 kHz 34 dBm 897.38997996 MHz SWT 2 s RF Att Unit 40 dB dBm 34 21 dB Offset 30 1 A 20 10 1MA 0 -10 -20 -30 -40 -50 -60 -66 Center 897.4 MHz Date: Page 14 28.APR.2003 200 kHz/ Span 2 MHz 15:09:42 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation Additional information for EDGE troubleshooting EDGE mode troubleshooting differs slightly from basic GSM troubleshooting. Establish connection to the phone normally (see GSM900/1800/1900 troubleshooting instructions).
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RH-20 Company confidential CCS Technical Documentation Figure 8: Transmitter EDGE troubleshooting TX OK TX EDGE Troubleshooting Yes Check output signal level: +24…+30dBm@897.4MHz(GSM900) +22…+29dBm@1747.
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Company confidential RH-20 CCS Technical Documentation Figure 9: Helgo EDGE troubleshooting Helgo EDGE troubleshooting Check with oscilloscope: -TXI/TXQ signals -VR1, VR2, VR4, VR5, VR6 =2.8V -VrefRF01 = 1.35V -Helgo serial interface -TXP & TXC & TXA OK? No Baseband troubleshooting Yes Check with RF probe: 4G VCO signal output: -3589.6MHz (GSM900) -3495.
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RH-20 Company confidential CCS Technical Documentation Figure 10: Pa & ant switch EDGE troubleshooting PA & ant switch EDGE troubleshooting Check with RF probe signal level on PA input: ~ -8dBm@PCL=8 (GSM900) ~ -10dBm@PCL=2 (GSM1800&1900) OK? Yes Check with oscilloscope: -VANT1 (GSM900) -VANT2 (GSM1800) -VANT3 (GSM1900) OK? Yes Yes Replace ant. switch No Check with oscilloscope: -VBATT ~4V -Iref _900 ~2V peak -Iref_1800_1900 ~2.1V peak -VTXB = 2.8V pulsed -Mode = ~1.
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Company confidential RH-20 CCS Technical Documentation Pictures of EDGE transmitter signals Figure 11: I_ref_900 power level 8 at R701/C701 Figure 12: VTXB 900 power level 8 at C713 Issue 1 10/2003 Nokia Corporation.
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RH-20 Company confidential CCS Technical Documentation Figure 13: I_ref_1800/1900 power level 2 at R700/C700 Figure 14: VTXB 1800/1900 power level 2 at C714 Page 20 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation Figure 15: TXA 850/1800/1900 at C538 Figure 16: TXI/TXQ signal at C535/C536/R516/R517 Issue 1 10/2003 Nokia Corporation.
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RH-20 Company confidential CCS Technical Documentation Figure 17: VPECTRL3 (ALC) signal at C512 Page 22 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation EGSM900, GSM1800 and GSM1900 Receiver General instructions for Rx troubleshooting Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 modular 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. Set the DC supply voltage to 4.2V. Connect an RF-cable to the module test jig (MJS-38) RF connector and to RF signal generator.
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RH-20 Company confidential CCS Technical Documentation (Defaults) Apply 942.46771 MHz (channel 37 + 67.710 kHz offset), 1842.86771 MHz (channel 700 + 67.710 kHz offset) or 1960.06771 MHz (channel 661 + 67.71 kHz) –90 dBm signal to the RF-connector (remember to compensate for cable attenuation). Measuring with an oscilloscope on "RXI" or "RXQ" following screens should be seen on a working GSM900 , GSM1800 or GSM1900 receiver: Figure 18: RX I/Q signal ,burst mode, input level –90dBm.
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Company confidential RH-20 CCS Technical Documentation Figure 19: GSM1900 RX I or Q signal (trace2), burst mode. 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, 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.
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RH-20 Company confidential CCS Technical Documentation Figure 20: RX I&Q, phase difference 90 deg between signals. 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. Phase difference should be 90 degrees between RX I and Q signals at all bands. Page 26 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation Troubleshooting diagram for GSM900 receiver Phone in “Continuous” mode, AGC setting “12” Figure 21: GSM900 receiver troubleshooting Note! Generator level can be set higher if needed. Just note that levels will be different in whole chain respectively. Apply –90dBm 942.46771MHz signal from generator to antenna connector Yes Osilloscope at RX_I signal 170mVpp DC offset 1.35*** Frequency 67.
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RH-20 Company confidential CCS Technical Documentation Troubleshooting diagram for GSM1800 receiver Phone in “Continuous” mode, AGC setting “12 Figure 22: GSM1800 receiver troubleshooting Note! Generator level can be set higher if needed. Just note that levels will be different in whole chain respectively. Apply –90dBm 1842.86771MHz signal from generator to antenna connector Yes Osilloscope at RX_I signal 170mVpp DC offset 1.35*** Frequency 67.
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Company confidential RH-20 CCS Technical Documentation Troubleshooting diagram for GSM1900 receiver Phone in “Continuous” mode, AGC setting “12 Figure 23: GSM1900 receiver troubleshooting Note! Generator level can be set higher if needed. Just note that levels will be different in whole chain respectively. Apply –90dBm 1960.06771MHz signal from generator to antenna connector Yes No Osilloscope at RX_I signal 160mVpp DC offset 1.35*** Frequency 67.
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RH-20 Company confidential CCS Technical Documentation Synthesizer General instructions for synthesizer troubleshooting Connect test jig to computer with DAU9S cable or to FPS-8 Flash Prommer with XCS-4 modular 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. Set the DC supply voltage to 4.2V. Set the phone module to test jig and start Phoenix service sofware Initialize connection to phone.
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Company confidential RH-20 CCS Technical Documentation Figure 24: Synthesizer troubleshooting diagram Synthesizer troubleshooting Yes *(When 2.5kOhm passive probe is used, correct the measurement by +34 dB Set with RF controls: Active Unti = Rx Operation mode = Continuous Yes Synthesizer OK Check with RF probe: -4G VCO out signal - 3589.6 MHz (GSM900) -3495.
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RH-20 Company confidential CCS Technical Documentation Pictures of synthesizer signals Figure 25: 26MHz at G501 pin out Figure 26: 26MHz RFCLK at R420/C420 Page 32 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation Figure 27: 1800 TX, channel 512, burst mode Figure 28: 1900 RX, channel 810, continuous mode Issue 1 10/2003 Nokia Corporation.
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RH-20 Company confidential CCS Technical Documentation Figure 29: VCO output, 1800 band, ch700, RX on, continuous output Page 34 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation Baseband troubleshooting Figure 1: Basic baseband test points Issue 1 10/2003 Nokia Corporation.
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RH-20 Company confidential CCS Technical Documentation Page 36 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation The following diagrams describe baseband troubleshooting. Main Troubleshooting Diagram Figure 2: Baseband general troubleshooting Issue 1 10/2003 Nokia Corporation.
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RH-20 Company confidential CCS Technical Documentation Phone is dead Figure 3: Dead phone troubleshooting Start Is phone current 0 mA? Yes Check X100 (contacts, solderings). Is it OK? No Change X100 No Change defect ones Yes Check L260 L265 and C260 C265.
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Company confidential RH-20 CCS Technical Documentation Flash Programming Fault Figure 4: Flash programming troubleshooting Start Is the FBUS TX-line HIGH after startup? Measure BSI-pulse during Flash operation. Is it OK? No No Check BSI-line including X100,C100,C240,R202 and R206. Yes Yes Measure FBUSTX-line during Flash operation (J411). Is it ~1.8V?. Yes Is FBUSTX-line set to LOW after it has been HIGH? No Check R104.
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RH-20 Company confidential CCS Technical Documentation Phone is jammed Figure 5: Jammed phone troubleshooting (1) Phone is jammed Measure VIO, VCORE, VFLASH1, VANA, VR3 voltages. Are they OK ? No Measure 32kHz SleepClk from testpoint J404. No Is it OK ? No Yes Yes No Yes Measure PURX signal from testpoint J402. Is it HIGH (~1.8V) ? Measure 32kHz SleepClkfrom B200. Is it OK ? Measure 26MHz RFCLK from G501.
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Company confidential RH-20 CCS Technical Documentation Figure 6: Jammed phone troubleshooting (2) Phone is jammed 2 Phone Shutdown after 30s Yes Measure watchdog signal CBUSDA from J414. Is it OK ? No Change UPP Yes No Retest Measure CBUSClk 1MHz signal from testpoint J406. Is it OK ? No Yes Read phone info. Is it OK ? Yes No Measure FBUSRx signal during phone info read from testpoint J412.
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RH-20 Company confidential CCS Technical Documentation SIM card fault (Insert SIM / Card rejected) Figure 7: SIM card troubleshooting Start Insert SIMor Card rejected fault? Yes Set phone to LOCAL mode. Is it OK? No Check BSI-line including X100,C100,C240,R202 and R206. If OK, change UEM. No Check VSIM-line (X386,C390,R386,C203). If OK, change R388. If still fail, change UEM. No Check SIM lines (X386). If OK, change R388. If still fail, change UEM. Yes No Measure VSIM voltage from X386.
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Company confidential RH-20 CCS Technical Documentation Keypad Fault Figure 8: Keypad troubleshooting (1) Start Is the power key working? No Measure voltage from S302. Is it HIGH? No Check R306,C310,S30 2 and line. If OK, change UEM Yes Measure voltage from S302 when Yes pressed. Is it HIGH? Yes Check S302. Is it OK? Yes Phone is dead No No Phone is jammed Is the volume UP key working? No Measure ROW0 line from S300. Is it ~1.8V? No Check S300 and line. If OK, change Z300.
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RH-20 Company confidential CCS Technical Documentation Figure 9: Keypad troubleshooting (2) Continue Is the UI-module keys working? No Try to change UI PWB. Are the keys working now? Retest failing UI-module Yes No Check X301 (solder joints and spring contacts). Is it OK? Change X301 No Yes Measure ROW0 - Row4 lines from X301. Are voltage level ~1.8V? No Yes Measure SLEEPX-signal from testpoint J403 when key is pressed. Is voltage level ~1.8V? Check lines ROW0 ROW4 from X301.
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Company confidential RH-20 CCS Technical Documentation Display Fault Figure 10: Display troubleshooting Start Does the display start? No Try to change UI-module. Is the display working now? Yes Retest failing UI-module No Yes Check X302 (solder joints). Is it OK? No Change X302 Yes Measure VDD (2.7V) and VDDI (1.8V). Are they OK? No Check X302 and lines again. If OK, change UEM No Check X302 and lines again. If OK, change UPP No Check X302, R308,R309 and lines. If OK, change UPP.
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RH-20 Company confidential CCS Technical Documentation Illumination fault Figure 11: Backlight troubleshooting Start Are the display LED's working? No Try to change display. Are the LED's working now? Yes Retest failing display No Yes Check X302 (solder joints). Is it OK? No Change X302 Yes Are the keyboard LED's working? No Measure VLED+ and VLED-. VLED+ = ~7.5V and VLED= ~0.5V when LED driver is enabled. Are they OK? (Notice: VLED+=VBATT when driver is disabled) No Try to change UI PWB.
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Company confidential RH-20 CCS Technical Documentation Charger Fault Figure 12: Charging troubleshooting Start Battery bars are working (scroll) Yes Retest No Measure voltage over V100 (TVS). Is it > 3.0V? Check X102, F100, L100, V100, C106, C110 and line. No Change defect part (if any), re-calibrate charge current/voltage. Retest. Yes Read BTEMP value. Compare it to ambient temperature. Is it ~25C? No Check X100, C100, R202, R207, C220 and line.
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RH-20 Company confidential CCS Technical Documentation Accessory Fault Figure 13: Accessory troubleshooting Start Is accessory detected when connected to system connector? Yes No Check system connector X101 (solder ings, contact plates). Is it OK? Repair solderings or check contact plates if dirty. Retest. No Yes ACI-Accessory Measure ACI-line (pin3). Is it ~0.83...1.13V? No Check ACI- line (L106,R103,R102,R109,C103). If not OK, change defect part and retest. Yes Measure VOUT voltage (pin4).
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Company confidential RH-20 CCS Technical Documentation Audio Fault Figure 14: Audio troubleshooting (1) Audio faults Is earpiece working ? Yes No Try to change UI- module. Is it working now ? Check earpiece contact springs from old UI-module and change earpiece and foam to old UImodule. Retest. Yes No Change old UI -module back.Set phone to LOCAL mode. Using Phoenix Audiotest set EXT IN, HP OUT, LOOP ON Measure DCoffset voltage between earpiece pads J310/J311 and GND. Is it ~1.
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RH-20 Company confidential CCS Technical Documentation Figure 15: Audio troubleshooting (2) Earpiece 2 Connect EXT audio signal 1kHz (sine, 200mVpp) between XMICP and XMICN pads (X101, 9/10) Measure sine signal from earpiece pads (J310,J311). Is It ~880mVpp ? Yes No Measure sine signal to UEM (R155). Is it ~130mVpp ? No Yes Check C154. If OK change UEM Check C154, R155, C156, R154, C159, R158, R159 and lines. Change UPP Retest Page 50 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation Figure 16: Audio troubleshooting (3) Audio faults 2 Is microphone working ? Yes No Try to change new UI-module. Is it working Yes now ? No Check mic contact springs from old UI module. If not OK replace microphone in old UI module with new one. Retest. Restore old UI module. Set phone to LOCAL mode. Using Phoenix Audiotest set HP IN, EXT OUT, LOOP ON Measure MICB1voltage from MICP pad. Is it ~2.
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RH-20 Company confidential CCS Technical Documentation Figure 17: Audio troubleshooting (4) Audio faults 3 IHF speaker working ? Try to change new Ccover assembly. Is it working now? No IHF speaker or contact springs fault. Retest. Yes Yes No END Check C160, C161, C169, C166, R163, L151, L152, C164 and IHF PA output lines. Retest. Restore old C-cover. Set phone to local mode with Phoenix. Set buzzer ON, vol "9" and freq. to 1kHz. No Yes Measure DClevel between IHF pads J156/J157 to GND.
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Company confidential RH-20 CCS Technical Documentation Camera Troubleshooting Figure 18: Component placement Figure 19: Trace layout Issue 1 10/2003 Nokia Corporation.
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RH-20 Company confidential CCS Technical Documentation Camera Fault Camera troubleshooting diagram Page 54 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation FM Radio troubleshooting Figure 20: FM Radio Component layout Figure 21: Trace layout. Issue 1 10/2003 Nokia Corporation.
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RH-20 Company confidential CCS Technical Documentation Figure 22: FM radio block layout. 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. FM Radio troubleshooting diagram Notes to "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.
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Company confidential RH-20 CCS Technical Documentation Figure 23: FM radio troubleshooting diagram Set phone into local mode. Start FM radio. NO Does the radio start ? Check C374, C375, R375, R358 and measure 32kHz clock signal from J359, retest starting. Start OK ? Measure voltages from pins 7 and 34, is it –2.7 V ? Retest starting. Start OK now ? NO NO YES Check N356 solders (pins 5,6,7,8,9,11, 12,13,17,33,34,35, 36, 37.
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RH-20 Company confidential CCS Technical Documentation Diagrams of FM radio signals Figure 24: Oscilloscope screen shot, Audio output 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 25: FM radio clock from test point J359, 32 kHz frequency clock signal, when radio is on.l Page 58 Nokia Corporation.
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Company confidential RH-20 CCS Technical Documentation Figure 26: FM frequency from FM radio pin 37, the other end of L358, with FM test signal 15:51:49 03 JUL 2002 REF -20.0 dBm MKR 97.9280 MHz -71.03 dBm #AT 0 dB PEAK LOG SWEEP CONT SGL FREE RUN 10 dB/ VIDEO LINE WA SB EXTERNAL CORR SC FS SYNC CRD CENTER 98.0000 MHz #RES BW 10 kHz SPAN 300.0 kHz #SWP 1.
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