Customer Care Solutions RH-23 Series Transceivers Troubleshooting Instructions Issue 1 03/2004 Nokia Corporation
RH-23 Company confidential Troubleshooting Instructions Page 2 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation RF Troubleshooting ....................................................................................................... 5 Introduction to RF troubleshooting .............................................................................5 RF Key component placement .....................................................................................6 RF Measurement points ................................................................................
RH-20 Company confidential CCS Technical Documentation Page 4 Copyright Nokia. All rights reserved.
Company confidential RH-23 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.
RH-23 Company confidential CCS Technical Documentation RF Key component placement Figure 1: Component placement 1 Page 6 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation RF Measurement points Figure 2: Component placement 2 Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation EGSM900 and GSM1800 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.
Company confidential RH-23 CCS Technical Documentation - Set Tx PA mode to "Free" (Default) - Set power level to 5 (Default = 19) on GSM900 or to 0 (Default = 15) on GSM1800 Issue 1 03/2004 Nokia Corporation.
RH-23 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.
Company confidential RH-23 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.
RH-23 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.
Company confidential RH-23 CCS Technical Documentation Pictures of transmitter signals Figure 6: TXI VPCT 1 200mV/div 100us/div 200mV/div VPCTRL _900 power level high at R703/C703 VPCTRL_1800 power level high at R704/C704_ X I/Q at R516/517 power level high Random data 1 500mV/div 100us/div VANT_1 / GSM900 TX at C805 VANT_2 / GSM1800 TX at R804 ( no signal/ Flatline on Oscilloscope screen) 500mV/div 100us/div VANT_1,VANT_2,VANT_3 500mV/div 100us/div VTXB_900 at C713 VTXB_1800 at C714 Issue
RH-23 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.
Company confidential RH-23 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 troubleshooting instructions).
RH-23 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.
Company confidential RH-23 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.
RH-23 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.
Company confidential RH-23 CCS Technical Documentation Pictures of EDGE transmitter signals Figure 11: I_ref_900 power level 8 at R712/C726 Figure 12: VTXB 900 power level 8 at R718 Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Figure 13: I_ref_1800 power level 2 at R713/C727 Figure 14: VTXB 1800 power level 2 at C717 Page 20 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation Figure 15: TXA 900/1800 at C538 Figure 16: TXI/TXQ signal at C535/C536/R516/R517 Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Figure 17: VPECTRL3 (ALC) signal at C512 Page 22 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation EGSM900 and GSM1800 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.
RH-23 Company confidential CCS Technical Documentation 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 or GSM1800 receiver: Figure 18: RX I/Q signal ,burst mode, input level –90dBm.
Company confidential RH-23 CCS Technical Documentation Figure 19: 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. Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Troubleshooting diagram for GSM900 receiver Phone in “Continuous” mode, AGC setting “12” Figure 20: 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.
Company confidential RH-23 CCS Technical Documentation Troubleshooting diagram for GSM1800 receiver Phone in “Continuous” mode, AGC setting “12 Figure 21: GSM1800 receiver troubleshooting Apply –90dBm 1842.86771MHz signal from generator to antenna connector Yes Osilloscope at RX_I signal 170mVpp DC offset 1.35*** Frequency 67.
RH-23 Company confidential CCS Technical Documentation Synthesizer General instructions for synthesizer 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 or FPS-8 to module test jig with PCS-1 cable. Set the DC supply voltage to 3.9 V. Set the phone module to test jig and start Phoenix service software.
Company confidential RH-23 CCS Technical Documentation Figure 22: Synthesizer troubleshooting diagram *When 2.5 kOhm passive probe is used, correct the measurement by +34 dB. From Phoenix choose: File -> Choose product -> RH 23/33 Maintenance -> Testing -> RF controls -> GSM900/1800/1900 -> RX -> continuous -> ch 37/700/661 Check with spectrum analyzer VCO frequency: 3769.6 MHz (GSM900) 3685.
RH-23 Company confidential CCS Technical Documentation Pictures of synthesizer signals Figure 23: 26MHz at G501 pin out Figure 24: 26MHz RFCLK at R420/C420 Page 30 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation Figure 25: 1800 TX, channel 512, burst mode Figure 26: VCO output, 1800 band, ch700, RX on, continuous output Marker 1 [T1] Ref Lvl 0 dBm -3.39 dBm 3.68561900 GHz 0 RBW 10 kHz VBW 10 kHz SWT 25 ms RF Att Unit 10 dB dBm 1 A -10 -20 -30 1VIEW 1AP -40 -50 -60 -70 -80 -90 -100 Center 3.68562 GHz Date: Issue 1 03/2004 10.OCT.2003 100 kHz/ Span 1 MHz 13:21:36 Nokia Corporation.
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Company confidential RH-23 CCS Technical Documentation Baseband troubleshooting Figure 27: RH-23 Baseband Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Figure 28: Testpoints, top Page 34 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation Figure 29: Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Main Troubleshooting Diagram g g Figure 30: Baseband general troubleshooting START Figure 4: Baseband general troubleshooting Phone totally dead Yes Phone is dead Yes Flash fault Yes Phone is jammed Yes Charging fault Yes SIM card fault Yes Keypad fault Yes Display fault No Flash programming doesn’t work No Phone doesn’t start up or the phone is jammed No Charging doesn’t work No Phone doesn’t read SIM card No Keypad doesn’t w
Company confidential RH-23 CCS Technical Documentation Phone is dead Figure 31: Dead phone troubleshooting Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Flash fault In figure 6 (Flashing signals) you can see simplified diagram of signals and connections needed for flash programming. VBAT, BSI, GND, FBUSRX, FBUSTX, Vpp, MBUS are connected to prommer during flashing. Flash programming is a sequence of tasks and handshakes which are all needed to pass in order to succesfully flash the phone.
Company confidential RH-23 CCS Technical Documentation Flash fault In Table 1 you can see the signals/components related to each flashing error. When the text is bolded the item is being used first time during the flashing procedure. Table 1: Most common error messages Error Description Used signals/components Points to check C101 The Phone does not set FlashbusTXD line high after the startup.
RH-23 Company confidential CCS Technical Documentation Error Description Used signals/components C584 C684 The Phone has generated NAK signal during data block transfer. Combo Flash and UPP Signals between UPP and Combo Flash C585 C685 The Phone has not acknowledged data block correctly. Combo Flash and UPP Signals between UPP and Combo Flash C586 C686 The erasing status response from the Phone informs about fail. Combo Flash Page 40 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation Phone is jammed Figure 34: Jammed phone troubleshooting Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Charging fault Figure 35: Charging failure troubleshooting Page 42 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation SIM card fault (“Insert SIM card” or “SIM card rejected”) Figure 36: SIM failure troubleshooting Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Keypad fault Figure 37: Keypad failure troubleshooting Page 44 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation Keypad fault (continued) Figure 38: Keypad failure troubleshooting Issue 1 03/2004 Nokia Corporation.
RH-23 Company confidential CCS Technical Documentation Display fault Figure 39: Display failure troubleshooting Page 46 Nokia Corporation.
Company confidential RH-23 CCS Technical Documentation Accessory detection fault Figure 40: Accessory detection failure troubleshooting Start Is accessory detected when connected to Pop-port? Figure 14: Accessory detection failure troubleshooting No Check Pop-Port X101 (soldering, contact plates), are they OK? Repair solderings or clean contacts if dirty. Retest. No Yes Measure ACI-line when accessory NOT connected (pin 3). Is it ~2.8V? Check L106, R103, R102, C103 & R109 and line.
RH-23 Company confidential CCS Technical Documentation Audio faults Figure 41: Audio (earpiece) failure teoublehooting Audio faults Can you hear proper audio from earpiece? (no distortion) Figure 15: Audio (earpiece) failure troubleshooting No Failure in upper block or Hinge flex Check earpiece contact springs Test lower block in from failing Upper Block . Check module jig with Yes also X1100, L1100, C1100, functional upper block. R1111, R1110 and lines. OK? Change failing part. Retest.
Company confidential RH-23 CCS Technical Documentation Figure 42: Audio (earpiece 2) failure troubleshooting Earpiece 2 Connect EXT audio signal 1kHz (sine, 200mVpp) between XMICP and XMICN pads using CA-6UT cable Measure sine signal between No module jigs “hinge” EarN (pin11) and EarP(pin12). Is it 160mVpp? (80mVpp measured to GND. DC_offset ~1.35V) No Measure resistances from Pop-Port’s XMICP to C172 and Pop-Port’s XMICP to C173.
RH-23 Company confidential CCS Technical Documentation Audio fault (microphone) Figure 43: Audio (microphone) failure troubleshooting Figure 17: Audio (microphone) failure troubleshooting Audio faults 2 Is Microphone working? No Try to change microphone. Is it working now?? Check microphone contact springs from old microphone. If not OK, replace B-cover lower with new microphone in it. Retest Yes No Yes Restore old microphone back. Set phone to LOCAL mode.
Company confidential RH-23 CCS Technical Documentation Audio fault (IHF) Figure 44: Audio (IHF) troubleshooting Audio faults 3 Figure 18: Audio (IHF) failure troubleshooting Failure in upper block or Hinge flex Is IHF-speaker working? Test lower block in module jig with functional upper block. OK? No Test failing upper block in module Jig. OK? Yes Failure in lower block Yes Yes No No Check IHF speaker and hinge flex Set phone to LOCAL mode in jig. Set buzzer ON, vol “9” and freq. to 1kHz.
RH-23 Company confidential CCS Technical Documentation Audio fault (headset microphone) Figure 45: Audio (headset microphone) failure troubleshooting Audio faults 4 Audios at headset microphone are failing? (the failure is not in the headset itself) No Figure 19: Audio (headset microphone) failure troubleshooting Yes Set phone to LOCAL mode. Using Phoenix Audiotest select: “Ext microphone in Ext speaker out” and set Loop “On” Measure XMIC-biasing voltage from Pop-Port pin 10(XMICP) to GND. Is it ~2.
Company confidential RH-23 CCS Technical Documentation Audio fault (headset earpiece) Figure 46: Audio (headset earpiece) failure troubleshooting Figure 20: Audio (headset earpiece) failure troubleshooting Audio faults 5 Audios at headset earpiece are failing? (the failure is not in the headset itself) No Yes Set phone to LOCAL mode.
RH-23 Company confidential CCS Technical Documentation Camera fault Figure 47: Camera failure troubleshooting Figure 21: Camera failure troubleshooting Start Does the viewfinder start? Yes Failure in Upperblock OR Hinge flex No Check engine PWB in module jig. Does camera work? Failure in Lowerblock Yes No No Check X302. OK? Change/fix & retest Yes Yes No Yes Adjust & Retest According to repair instructions - repair or Change Upper Block Flex Assy.
Company confidential RH-23 CCS Technical Documentation FM Radio Troubleshooting Notes to FM-Radio Troubleshooting: • Use 1MHz 1X probe when measuring audio and clock signals with oscilloscope. • Use active RF probe when measuring frequencies with spectrum analyzer. • Use CA-6UT audio test cable to input FM Signal and force “Tomahawk Stereo Headset” on FM Radio Test Phoenix. RF Test signal parameters: • Amplitude, A, -67dBm • Carrier frequency, fc, 98.
RH-23 Company confidential CCS Technical Documentation Figure 49: FM-Radio failure troubleshooting Figure 22: FM-Radio failure troubleshooting Set phone into LOCAL mode. Start FM-radio. Does the radio start? Check C374, C375, R357, R358 and measure 32kHz clk signal from J357, retest starting. Start OK? No Yes No Measure voltages from pins 7 and 34. Is it ~2.7V? Retest starting. Start OK now? Yes No Yes Connect RF-test signal (note). Set radio channel to 98.0MHz. Set radio volume to max.
Company confidential RH-23 CCS Technical Documentation Keypad Illumination Fault Figure 50: Keypad illumination troubleshooting Figure 23: Keypad illumination troubleshooting Start Do the keypad lights switch on? No Check UI-board position and connector X301. OK? No Change/fix defect component(s) Yes Activate lights with Phoenix and measure J307=0V Yes No Change UEM (D200) Yes Measure X301 pins 14 to 17. Are they ~3.5V? No Check C300, C301, R300, C302 and C303.
RH-23 Company confidential CCS Technical Documentation LCD1 Illumination Fault Figure 51: LCD1 illumination troubleshooting Start Do the LCD1 lights switch on? No Change upper block flex assy. Are the lights working now? Yes Yes Check LCD module, connectors X1100, X1101, X302 and upper block assy. Change/fix failing part No Activate lights with Phoenix and measure D305 SD pin ~0V and Brgt pin ~0.6V No Check V313, R332 and R333.
Company confidential RH-23 CCS Technical Documentation LCD2 Illumination Fault Figure 52: LCD2 illumination troubleshooting Figure 25: LCD2 illumination troubleshooting Start Do the LCD2 lights switch on? Yes No Change upper block flex assy. Are the lights working now? Yes Check LCD module, connectors X1100, X1102, X302 and upper block assy. Change/fix failing part No Close fold and activate lights with Phoenix. measure D305 SD pin = 0V and Brgt pin ~0V No Check V313, R332 and R333.
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