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Programmes After Market Services

TME-3 Series Transceivers

Issue 3 10/03 Nokia Corporation.

Disassembly and Troubleshooting

Summary of content (44 pages)

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Programmes After Market Services TME-3 Series Transceivers Disassembly and Troubleshooting Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation [This page intentionally blank] Page 2 Nokia Corporation.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting Table of Contents Page No Introduction to troubleshooting...................................................................................... 5 Disassembly of TME-3 .................................................................................................. 6 RF Troubleshooting ....................................................................................................... 9 Introduction to RF troubleshooting ..............
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Table of Figures Page No Fig 1 SIM card cover removal .............................................................................................6 Fig 2 Screw removal ............................................................................................................6 Fig 3 Remove the B-cover. ..................................................................................................7 Fig 4 B-cover removed ...............
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting Introduction to troubleshooting The first thing to do is carry out a through visual check of the module. Ensure in particular that: a) there are not any mechanical damages b) soldered joints are OK Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Disassembly of TME-3 1. Remove the lens. Figure 1: Lens removal 2 1 2. Turn the device upside down and remove the two screws. Figure 2: Screw Page 6 removal l Nokia Corporation.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting 3. Remove the B cover. Figure 3: Remove the B-cover. Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation 4. Remove the data module from the A-cover Figure 4: B-cover removed NOTE: The screws require Torx6 screwdriver tip. Thecorrect tightening torque is 25Ncm. Page 8 Nokia Corporation.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting RF Troubleshooting Introduction to RF troubleshooting The RF-section of the RL7 module is build around one RF-ASIC (HAGAR, N600). For easier troubleshooting, the instructions are divided into three sections: transmitter, receiver and synthesizer.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation RF Key component placement Figure 5: RL7 module component placement 1 External antenna connector/switch Dual PA Dual coupler (under frame) Internal antenna pad Antenna switch Dual RX 1st SAW PCN LNA EGSM LNA EGSM TX SAW PCN TX balun PCN RX 2nd SAW EGSM RX 2nd SAW HAGAR RFIC VCO balun 26MHz VCTCXO 4GHz VCO NOTE! You can remove (cut) the frame above the power amplifier, ex. PA exchange Page 10 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation RF Measurement points PA environment Figure 6: Measurement points, PA 1/2 EGSM PA ctrl PCN PA ctrl EGSM PA bias PCN antsw tx ctrl EGSM antsw tx ctrl EGSM RX PCN RX PCN RX 1st SAW out EGSM RX 1st SAW out V500, RFin EGSM PA in PCN PA in LNA_P V500, RFout LNA_G V550, RFin LNAB_G V550, RFout LNAB_P PCN PA bias HAGAR environment below: Figure 7: Measurement points, PA 2/2 EGSM bal out VrefRF01 VR6 VrefRF02 RX_I_in RX_Q_in EGSM LNA out
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation GSM900 & GSM1800 Transmitter General instructions for Transmitter (Tx) troubleshooting Connect the test jig to the PC with the DAU-9S cable or to the FPS-8 Flash Prommer with a XCS-4 modular cable. Make sure that you have the PKD-1 dongle connected to the PCs parallel port. Connect DC power supply to module test jig with a suitable cable.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting - Set Rx/Tx channel to 37 on GSM900 band or 700 on GSM1800 band (Defaults) - Set Tx PA mode to "Free" (Default) - Set power level to 5 (Default = 19) on GSM900 or to 0 (Default = 15) on GSM1800 For transmitter schematics refer to the A3 size diagrams at the end of the manual. Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Transmitter troubleshooting diagrams g gFigure 8: Tx troubleshooting Page 14 Nokia Corporation.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting Figure 9: Hagar Troubleshooting diagram Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Figure 10: PA&Ant troubleshooting diagram Page 16 Nokia Corporation.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting Oscilloscope screen shots of transmitter signals Figure 11: TXI_0, Tx on, Random data, Burst mode Figure 12: TXQ_0, Tx on, Random data, Burst mode Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Figure 13: 900/1800 antsw tx contr, Tx on, burst mode Figure 14: 900/1800 PA bias, Tx on, burst mode Page 18 Nokia Corporation.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting Figure 15: 900/1800 PA ctrl, Tx on, burst mode, high power level Figure 16: Tx out signal, 900 band, burst mode, channel 37 Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation GSM900 & GSM1800 Receiver General instructions for Rx troubleshooting Connect test jig to the PC with DAU9S cable or to FPS-8 Flash Prommer with XCS-4 modular cable. Make sure that you have PKD-1 dongle connected to the PCs parallel port. Connect DC power supply to module test jig with a suitable cable. Set the DC supply voltage to 13.5 V. Connect an RF-cable to the module test jig (MJS-63) RF connector and to RF signal generator.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Measuring with an oscilloscope on "RX_I" or "RX_Q" this picture should be seen on a working GSM900 or GSM1800 receiver: Figure 17: Receiver signal Signal amplitude is 700 mVpp, DC offset 1.35 V and frequency 67 kHz. If this picture is not seen, continue to the next section. For receiver schematics refer to the A3 size schematics at the end of the manual. The following diagrams are used in troubleshooting the receiver.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Figure 18: Troubleshooting diagram for GSM900 receiver Troubleshooting diagram for GSM900 receiver Apply –90dBm 942.46771MHz signal from generator to antenna connector Yes Oscilloscope at RX_I Signal 700mVpp DC offset 1.35V Frequency 67.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Figure 19: Troubleshooting diagram for GSM1800 receiver Troubleshooting diagram for GSM1800 receiver Apply –90dBm 1842.86771MHz signal from generator to antenna connector Yes Oscilloscope at RX_I Signal 700mVpp DC offset 1.35V Frequency 67.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation LNA gainstep checking GSM900 & GSM1800 EGSM LNA out PCN LNA out - RF-level at antenna port e.g. –50 dBm - RX continuous mode (local mode) - difference between AGC –settings "FEG on" and "FEG off" roughly 25 dB (using 250 ohm passive RF-probe) - RF-level at antenna port e.g.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting Synthesizer General instructions for synthesizer troubleshooting Connect test jig to the PC 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 the PCs parallel port. Connect DC power supply or FPS-8 to module test jig with a suitable cable. Set the DC supply voltage to 13.5 V.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Figure 20: Synthesizer troubleshooting diagram Page 26 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Pictures of synthesizer signals Figure 21: 26MHz XO out Figure 22: 13 MHz clock Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Figure 23: 4GHz VCO ctrl 900 RX, channel 124, continuous mode Figure 24: 4GHz VCO ctrl 1800 TX, channel 512, continuous mode Page 28 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Figure 25: 4GHz VCO output, 1800 band, RX on, continuous mode REF - 2 0 . 0 1 0 d B/ MK R 3 . 6 1 0 4 0 0 d Bm 1 0 Fr i d B Ma y 1 1 1 3 : 0 3 : 2 6 2 0 0 1 A_ v i e wB_ b l a n k MA R K E R 3 . 6 1 0 4 0 0 GHz - 3 0 . 7 2 d Bm GH z RBW 1 0 k Hz VBW 1 0 k Hz S WP 5 0 ms CENT ER Issue 3 10/03 ATT 3 . 6 1 0 4 0 0 0 GH z Nokia Corporation. SPAN 2 .
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Baseband Troubleshooting Troubleshooting steps The following hints help to find the problem if the baseband circuitry seems to be faulty. The instructions are divided into following sections: 1. Phone is totally dead 2. Flash programming doesn't work 3. Power doesn`t stay on or the phone is jammed 4. Plug in SIM card is out of order (insert SIM card). 6. Audio fault The first thing to do is carry out a through visual check of the module.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Terminal is dead (1) Figure 26: Dead terminal, 1 START Terminal totally dead YES Power faults NO YES Flash programming doesn't work Flash faults NO YES Terminal is jammed Terminal jammed NO YES Terminal doesn't read SIM card SIM faults NO YES Audio faults Audio fault NO YES LED fault LED faults NO M2M system connector fault YES M2M SC faults NO END Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Terminal is dead (2) Figure 27: Dead terminal Phone is dead Phone current is zero ? Check X101 solder and VBATT lines Yes No Yes Phone current is < 50mA No Is phone flash programing OK ? Yes Phone is jammed No Flash faults No Phone current is ~ 54 mA Yes Is phone in LOCAL MODE ? Yes No Check BSI line X101, C241, R203, C109, R202 Are they OK ? Yes Change UEM No Repair OK retest Page 32 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Flashing fault (1) Figure 28: Flashing fault 1 Flash faults The Phone does not set Flashbus TXD line high after the startup. Yes No Measure BSI pulse during Flash programming. Is it OK ? No Check BSI line X101, C241, R203, C109, R202 Yes Measure FBUSTX line during Flash programming from testpoint J411 Is it High (1.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Flashing fault (2) Figure 29: Flashing fault 2 Flash faults page 2 Wrong manufactor ID and Device ID Yes Change FLASH Yes Phone is dead Yes Phone is jammed No Is the phone totally dead ? No Phone doesn´t start up or the phone is jammed ? No Retest Page 34 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Terminal jammed (1) Figure 30: Terminal jammed (1) Phone is jammed Measure VIO, VCORE, FLASH1, VANA, VR3 voltages. Are they OK ? No Check VBATT1-6 VIO, VCORE, FLASH1, VANA, VR3 lines. Are they OK? No Check BSI / BTEMP lines. If OK -> UEM regulators are not working Change UEM Yes Yes Measure 32.6kHz Sleep Clk from testpoint J404 Is it OK ? No Measure 32.6kHz Sleep Clk from B200.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Terminal jammed (2) Figure 31: Terminal jammed (2) Jammed Page 2 Phone shutdown after 30s Measure watchdog signal CBUSDA from testpoint J414 Is it OK ? Yes No Change UPP No Measure DBUSClk 1MHz signal from testpoint J413 Is it OK ? No Yes Read phone info.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation SIM card fault Figure 32: SIM card fault SIM card Insert SIM card faults No Yes No Set phone LOCAL mode Is it OK ? Check BSI line X101, C241, R203, C109, R202. If OK -> Change UEM Yes Check X386 Measure VSIM voltge from X386 Is it 3V ? No Check VSIM line,X386, C203, C389. If OK -> Change R388. If still wrong VSIM voltage -> Change UEM Yes Check SIM power UP sequency (Page 35 figure 19) Is it OK ? No Check SIM lines.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Signal diagrams 13 MHz clock Figure 33: 13 MHz clock 13MHz clk CH1=RFCONCLK (R420) 26 MHz signal Figure 34: 26 MHz signal 26MHz CH1=26MHz (G660 out) Page 38 Nokia Corporation.
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PAMS Technical Documentation TME-3 Disassembly and Troubleshooting Sleep clock signal Figure 35: Sleep clock signal SleepClk CH1=SleepClk (Testpoint J404) 1 MHZ Cbus clock signal Figure 36: 1 MHZ Cbus clock signal CBusClk 1MHz CH1=CBusClk (Testpoint J406) Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Timing diagram Figure 37: Timing diagram 0. VBAT below VMSTR. UEM in NO_SUPPLY or BACK_UP mode depending on the status of the back-up battery 1. VBAT appears => VBAT > VMSTR+ (master reset threshold): Bandgap, RC-osc and start-up logic starts. Time delay DELAY1 starts (Td1). 2. DELAY1, 20ms, elapses. UEM in RESET mode 3. VBAT rises above Vcoff+ threshold: Enable regulator reference buffers, time delay DELAY2 starts (200ms) 4.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation 7, 8, 9 mC resets the WATCHDOG (Twr < Toff) 10. mC switches Power Off by letting watchdog elapse, (Twr > Toff). PURX low, regulators disabled. 11. Power switched on via power switch (low level), VBATT > VCOFF+: DELAY1 starts. 12. DELAY1 elapsed:, Enable regulator reference buffers, time delay DELAY2 starts 13. DELAY2 elapses: Enable VFLASH1 regulator. DELAY3 starts. 14. DELAY3 elapses: ENABLE VIO, VCORE, VANA and VR3 regulators.
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TME-3 Disassembly and Troubleshooting PAMS Technical Documentation Flash 2 signal Figure 39: Flash 2 signal FLASH_2 CH1 CH2 CH3 CH4 = = = = PURX MBUS FBUSTX FBUSRX Measure points Production test pattern (J396) Flash 3 signal Figure 40: Flash 3 signal FLASH_3 CH1 CH2 CH3 CH4 = = = = PURX MBUS FBUSTX FBUSRX Measure points Production test pattern (J396) Data transfer has started (Fbus_Rx) Page 42 Nokia Corporation.
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PAMS Technical Documentation Issue 3 10/03 Nokia Corporation.
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TME-3 Disassembly and Troubleshooting Page 44 Nokia Corporation.