Nokia RH-53 Troubleshooting Instructions

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Nokia Customer Care

RH-53/54

7-Troubleshooting

Instructions

ISSUE 1 09/2004

Table of Contents

Troubleshooting

Summary of Contents for Nokia RH-53

Page 3: Table Of Contents
Audio troubleshooting 1, 2 ................16 Audio troubleshooting 3: Headset does not work ..........17 Upper block failures..................18 Introduction to RH-53/54 RF Troubleshooting ..........23 General description of the RF circuits ............24 Receiver signal path ..................24 Transmitter signal path ..................24 PLL........................
Page 4 RX calibration....................61 RX Band Filter Response ................64 Tx Power tuning ....................64 I/Q tuning ......................66 RF control ......................69 Autotune (RH-53 with CMU200) ............... 70 File adjustments....................70 Phoenix setup ....................70 List of Figures Page No Fig 1 BB test points ....................
Page 5 Fig 62 RF controls....................69 Fig 63 Phoenix-GPIB card ..................70 Fig 64 Set loss ...................... 71 Fig 65 Set loss 2 ....................71 Fig 66 Set loss 3 ....................72 ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 7: Baseband Troubleshooting
RH-53/54 Nokia Customer Care Baseband Troubleshooting ■ Baseband test points Figure 1:BB test points ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 8: Troubleshooting Diagrams
INOTE : Since both D200 (UEM) and D400(UPP) are underfilled, they can not be replaced. If either D200 or D400 is defective, the whole PWB has to be discarded. COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 9: Phone Is Dead
Else defective D200* Check : R426 26 MHz clock min. 300mVACpp, C227, C420, R420, PWB. probe Cin=10-13 pF/10M Else defective D200* Check : D450 (Flash). Else defective D200* ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 10: Flash Programming Does Not Work
Try reading M CU ID Check : w ith Phoenix. PW B. Else defictive D400* Reading OK? Try reading Flash ID Check : w ith Phoenix. Replace D450 Reading OK? Reflash phone COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 11: Power Does Not Stay On Or Phone Is Jammed
Lightguide, PWB. to pressure? Else defective D400* R426 Check : 26 MHz clock min. C420, C426, R420, 300mVACpp, R426, N600(Mjoelner) probe Cin=10-13 pF/10M Reflash phone ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 12: Display Information : "Contact Service
Key is stucked A-face, domesheet, PWB. Check : Flash checksum Reflash phone PWB. Else defective D450 (FLASH) ASIC version vs. compilation flag, PMM checksum PMM validity Warrenty Information State SIM-Lock COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 13: The Phone Does Not Register To The Network, Or The Phone Cannot Make A Call
R610, R611 Check : Check analog signals during R610, R611,PW B. GSM-frame (TX slot): Else defective D200* TXIP/N (R610) = 1-1,75VDC or D400* TXQP/N (R611) = 1-1,75VDC Check RF ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 14: Charging Troubleshooting
Phone is ON or OFF - battery nominal voltage (~3,6VDC) and no current from charger when connected Check : L100 F100, L100, V100, C100, VCHAR > 3,6VDC R200, System-connector. Defective D200 or D400* COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 15: Fig 9 Display Info:charger Connected, Not Charging
D200 same as VBAT voltage Else defective D200*v R200 Check : Voltage rises slowly on PWB. R200 towards D200 when Else defective D200* charger is connected. Check : ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 16: Audio Troubleshooting 1, 2
Headset earpiece do not work and the isn't any mechanical problem R183, Z102 Replace : Check R183, Z102 is working correctly C183 and/or Z102 (no open-circuit) Defective D200* COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 17: Audio Troubleshooting 3: Headset Does Not Work
Check voltage level on R151 Check : towards UEM (bias) = 1,0V - R156, C170, C174, C172, 1,4V R169 Check XMIC line to UEM (D200) Error still present Defective D200* ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 18: Upper Block Failures
Clock – Board to board connector pin 20 Data – Board to board connector pin 19 Check for SIM voltage during power-up Ch1 : VSIM Ch3 : CLOCK Ch2 : RESET Ch4 : DATA COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 19 Vibra failure 1. Flex B2B connector pressed in? 2. Change C2 cover assembly(new vibra)/Vibra works? 3. Change LCD can assembly (new flex) works? 4. Change main PWB (UEM)? ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 20: Fig 13 Vibra Troubleshooting
Bad connection. vibration? Defective vibra. Defective vibra. Mechanical problem Acoustical - counterweight hits noise? LCD can/C2 cover Loose parts in phone. Speaker failure 1. Flex B2B connector pressed in? COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 21 Don’t try and rework flex!! Handling is likely to cause the solder pads to brake or disconncect from track, which cannot be repaired in a reliable way by resoldering. Only reliable repair option is to change the flex (LCD can assembly)! ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 23: Introduction To Rh-53/54 Rf Troubleshooting
In the following both the name “low band” will be used to describe both GSM850 - EGSM and GSM900, while “high band” will be used for both PCN and GSM1800. ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 24: General Description Of The Rf Circuits
Highband. The signals from the SAW and Balun are then amplified in the Power Ampli- fier (PA) located in the Front End Module (FEM - N700) where the gain control takes place. In COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 25: Pll
Mjoelner IC. Only the X-tal is external. 26MHz is supplied to BB where a divide- by-2 circuit (located in the UPP IC) generates the BB-clock at 13MHz. The reference frequency ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 26 According to the figures above the PLL must be able to cover the frequency range 3420.4MHz to 3839.2MHz for the GSM900/1800 and 3296.8 to 3979.6MHz for the GSM850/1900. COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 27: Fig 16 Frequency Plan
BIST / Temp. Circuit level GENIO6 Control shift Resistor Ext/R2H/R2 RFBUSX RF_EN RF_CLK RFBUSDA RF_DATA RFBUSCLK Ref. 2,7k filte PA vendor indication 33k : Hitachi 82k : RFMD RFCONV_0(9) ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 28: Rf Key Component Placement
Z603 EGSM TX SAW Low band TX SAW filter B600 26 MHz crystal G600 VCO ( 3.6 GHZ VCO ) N700 Front End Module (FEM) X700 RF connector COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 29: Troubleshooting
1.8 V +/- 4.5% Digital com. interface @150 mA VCO module 2.78 V +/- 3% @45 mA 2.78 V+/- 3% Not used @50 mA Vbat Front End Module ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 30: Fig 19 Uem Measuring Points
There is only one PLL synthesizer generating Local Oscillator frequencies for both RX and TX in both bands (Lowband and Highband). The VCO frequency is divided by 2 for Highband op- eration or by 4 for Lowband operation inside the Mjoelner IC. COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 31: General Instructions For Synthesizer Troubleshooting
Synthesizer”. The level at this point is approx. 700mVpp. Frequency of this oscillator is ad- justed by changing the AFC-register inside the Mjoelner IC. This is done via the Mjoelner serial interface. ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 32: Example Signal Measured At Vcxo Output (R420)
Figure 20:Measured signal at VCXO output The VCO is generating frequencies in the range of 3420.4MHz – 3839.2 MHz for the RH-53 and in the range 3296.8 to 3979.6 MHz for RH-54 when the PLL is running. The output frequen-...
Page 33: Troubleshooting Chart For The Synthesizer
Phone not in function All 4.75Vdc Spectrum analyser Check Loop filter (R618, VCO output (R640) VCO (G600) is not functional R619, C639-C641) some signal between 3 and 4 GHz ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 34: Measurement Points For The Synthesizer
R426, C420, C426. ■ Measurement points for the Synthesizer Figure 22:Measurement points for Synthesizer Charge pump Supply C616) VPLL (C614, C634) VXO (C620) VXO (C618) VCXO Out (R420) COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 37: Receiver Troubleshooting
High Band TX RFMD FEM logic Table 6: RFMD FEM logic Mode VTX_B_P VTX_B_P Vant1 Vant2 Idle Low Band RX Low Band TX High Band RX High Band TX ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 38: Measurements Points
Figure 24:Measurement points for the FEM BS (C709) VTX (J700) RX1800 VC1 (C708) VC2 (C730) RX900 Figure 25:RX interface points between N600/SAW filters L610/612 END Z601out L602/603 END Z602out COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 39 RH-53/54 Nokia Customer Care Figure 26:Serial Bus interface measurement points RESETX RFBUSDA Mjoelner seriel interface RFBUSSENX RFBUSCLK Figure 27:I/Q measurement points RXQP RXQM RXIP RXIM ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 40: Receiver
Testing -> RFcontrols Select: Table 7: Band values Band: GSM850 Active Unit: Operation Mode: Continuous Rx/Tx Channel: AGC: The setup should now look like this: Figure 28:RF controls COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 41 N700 -65dBm Spectrum analyser Check signal after inductors Check inductor L602 and L603 L602, L603 -65dBm Osciloscope VRX 2.78 Vdc (C225) Check UEM, UPP Check Mjoelner serial interface ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 42 By measuring with an oscilloscope at RXIP or RXQP on a working GSM 850 receiver this pic- ture should be seen Signal amplitude peak-peak 588 mV DC offset 1.33 V Figure 30:Measuring with oscilloscope COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 43: General Instructions For Gsm1900 Rx Troubleshooting
Testing -> RFcontrols Select: Table 8: Band values Band: GSM1900 Active Unit: Operation Mode: Continuous Rx/Tx Channel: AGC: The setup should now look like this: Figure 31:Control values ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 44 N700 -65dBm Spectrum analyser Check signal after inductors Check inductor L602 and L603 L602, L603 -65dBm Osciloscope VRX 2.78 Vdc (C225) Check UEM, UPP Check Mjoelner serial interface COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 45 By measuring with an oscilloscope at RXIP or RXQP on a working GSM1900 receiver this pic- ture should be seen Signal amplitude peak-peak 588 mV DC offset 1.33 Figure 33:Measuring with the oscilloscope ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 46: Receiver
Testing -> RFcontrols Select: Table 9: Band values Band: GSM900 Active Unit: Operation Mode: Continuous Rx/Tx Channel: AGC: The setup should now look like this: Figure 34:Control values COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 47 Check Z602 switch -65dBm Z700 Spectrum analyser Cehck signal after inductors Check inductor L602 and L603 L602, L603 -65dBm Osciloskope VRX 2.7 Vdc Check Baseband Check Mjoelner serial interface ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 48: General Instructions For Gsm1800 Rx Troubleshooting
General Instructions for GSM1800 RX Troubleshooting Connect the phone to a PC with the module repair jig. Start Phoenix and establish connection to the phone Select->File ->Scan for product->CTRL-R Select-> Testing -> RFcontrols COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 49 Nokia Customer Care Select: Table 10: Band values Band: GSM1800 Active Unit: Operation Mode: Continuous Rx/Tx Channel: AGC: The setup should now look like this: Figure 37:Rf controls ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 50 N700 -65dBm Spectrum analyser Check signal after inductors Check inductor L610 and L612 L610, L612 -65dBm Osciloscope VRX 2.78 Vdc (C225) Check UEM, UPP Check Mjoelner serial interface COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 51 By measuring with an oscilloscope at RXIP or RXQP on a working GSM1800 receiver this pic- ture should be seen Signal amplitude peak-peak 588 mV DC offset 1.33 Figure 39:Measuring with oscilloscope ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 53: Rh-53/54 Transmitter Troubleshooting
R711 VPC (R712) VTX (J700) VDET (R713) X700 BS (C709) VC1 (C708) VC2 (C730) Figure 41:MjoelnerN600 test points Z603 in Z603 Out VPC (C644) T600 in T600 Out ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 54: General Instructions For Tx Troubleshooting
10-dB attenuator, otherwise the PA may be damaged. Start Phoenix Service Software and: Establish a connection to the phone e.g. FBUS. Select->File ->Scan for product->CTRL-R Select-> Testing -> RFcontrols COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 55 Select ”XX” , ”YY” and ”ZZ” according to the table below Table 12: Values Phone RH-54 GSM850 RH-53 GSM900 RH-53 GSM1800 RH-54 GSM1900 Your screen should look like this: Figure 43:Control values ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 56: Troubleshooting Chart For Gsm900 Transmitter
Signal ok on Check DC Change FEM Change FEM power GSM tester signals (N700) Change FEM, Check I/Q loop, Z603/T600 Output power Mjoelner Check I/Q, PLL, Z603/R714 TXC, DC (T600/R711) COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 57: Logic Signals For The Front End Module
If the FEM is exchanged with an other type, the R629 has to be changed, too. Renesa FEM logic Table 13: Renesa FEM logic Mode VTX_B_P VTX_B_P Vant1 Vant2 Low Band RX Low Band TX High Band RX High Band TX ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 60: I/Q Signals
Nokia Customer Care I/Q signals The following diagrams show different situations of TX IQ measurements. Depending on the time the modulation may cause the signal to look different. COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 61: Alignment
+ and – steps the value for every press. Repeat function seems not to work. In I/Q you can use the side arrows. ■ RX calibration Select Tuning, RX Calibration Select band GSM900 Press start Figure 47:RX calibration ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 62 Nokia Customer Care Follow the description in Phoenix, setting up the signal generator as described Figure 48:Calibration tuning Press the OK button Figure 49:Calibration tuning Press the Save&Continue botton. COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 63 RH-53/54 Nokia Customer Care Follow the description in Phoenix, setting up the signal generator as described Figure 50:Calibration tuning Press the OK button Figure 51:Calibration tuning ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 64: Rx Band Filter Response
Normally not needed in repair. ■ Tx Power tuning Select Tuning, Tx Power Level Tuning Figure 52:TX tuning Press start and follow the instructions in the pop-up window Figure 53:TX tuning COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 65 When done press Save&Continue and Phoenix will automatically shift from lowband to highband. At the same time the intermidiate values are calculated, but that is first seen next time you start a tuning. Figure 55:TX tuning ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 66: I/Q Tuning
SPA measuring. CMD55 shows the same as a spectrum analyzer when I/Q tuning is selected. CMU200 shows the carrier and sideband supression directly as figures in the modulation mode. COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 68 Tune Amplitude and phase to lowest sideband. When satisfied with the result, press Next. (The sidebands should hardly be visible).Or for CMU200 the supression should be better than -40dBc. Figure 60:I/Q tuning COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.
Page 70: Autotune (Rh-53 With Cmu200)
The lowest coefficient must be very close to 0. Check how the power tuning goes and try with some changes. In case of edge capability, copy from RH-12 and make some changes. RH-12 is for Gemini en- gine, RH-53 is for Mjoelner engine. For autotuning, please see also TB “Autotuning function in Phoenix”. ■...
Page 71 When that is done the PKD-1 donkle can be used, and the losses can not be changed with that dongle. Figure 64:Set loss Select or add a jig and define the losses Figure 65:Set loss 2 ISSUE 1 09/2004 COMPANY CONFIDENTIAL Copyright © 2004 Nokia. All Rights Reserved.
Page 72 Make sure the product has the right type of jig. (At the moment new products like RH-54 can not be added) Figure 66:Set loss 3 Note! CMU200: Remember that CMU200 is left as it was set in the autotune. Attenuation settings are at 0. COMPANY CONFIDENTIAL ISSUE 1 09/2004 Copyright © 2004 Nokia. All Rights Reserved.

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