Nokia 8210, 8850 サービスマニュアル
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nokia
Service & Analysis Center Europe
SACE CC Training Group
SACE CC Training Group
CONFIDENTIAL
11.10.2000
System Module RM7/RM7L
Baseband part 1
1(5)
NSM-2/3
Version 1.0 Approved
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J226
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Phone doesn´t switch on
-. Check current consumption: Off state 0-1mA, sleep mode 1-4mA, if too high continue with section “low standby / operation mode time".
1. Check connector X101 if bend or soiled.
2. Check Vb 3.6V at C129. If not ok, check L103.
3. Check if PWRONX at S330 drops to 0V during pressing powerswitch. If not ok, check/change S330, R118.
4. Check 32.768kHz at J228, 3.2Vpp squarewave. Ok, go to 6.
5. Check/change B100, R100, R102, R154, C101, C102, C113, change CCONT (N100) if necessary.
6. Check Vbb 2.8V at C107. If not ok, check resistance of line to GND or change CCONT (N100).
7. Check Vxo 2.8V at C152. If not ok, check resistance of line to GND or change CCONT (N100).
8. Check Vref 1.5V at C106. If not ok, check resistance of line to GND or change CCONT (N100).
9. Check SLEEPX 2.8V at J226. If not ok, MAD is faulty in all probability. Swap the phone because MAD is not changeable.
10. Check PURX 2.8V at J227 after pressing powerswitch. If not ok, change CCONT (N100).
11. Check 13MHz Clk-frequency at C213, approx. 800mVpp. If not ok, check values around G830, N505 and V800.
-. Try to flash the phone. If not ok, continue with section “Flash update not possible".
1. Check connector X101 if bend or soiled.
2. Check Vb 3.6V at C129. If not ok, check L103.
3. Check if PWRONX at S330 drops to 0V during pressing powerswitch. If not ok, check/change S330, R118.
4. Check 32.768kHz at J228, 3.2Vpp squarewave. Ok, go to 6.
5. Check/change B100, R100, R102, R154, C101, C102, C113, change CCONT (N100) if necessary.
6. Check Vbb 2.8V at C107. If not ok, check resistance of line to GND or change CCONT (N100).
7. Check Vxo 2.8V at C152. If not ok, check resistance of line to GND or change CCONT (N100).
8. Check Vref 1.5V at C106. If not ok, check resistance of line to GND or change CCONT (N100).
9. Check SLEEPX 2.8V at J226. If not ok, MAD is faulty in all probability. Swap the phone because MAD is not changeable.
10. Check PURX 2.8V at J227 after pressing powerswitch. If not ok, change CCONT (N100).
11. Check 13MHz Clk-frequency at C213, approx. 800mVpp. If not ok, check values around G830, N505 and V800.
-. Try to flash the phone. If not ok, continue with section “Flash update not possible".
Flash update not possible
-.
Check if fault code from prommer is one of the following :
A: External RAM failure :
-. Check values at D200, if OK, swap unit, ComboMemory faulty.
B: Algorithm code fail / alias ID missing:
-. Update FPS4 box with latest flash device list, try to update again. If fault persists, check values at D200, if OK, swap
-. Check values at D200, if OK, swap unit, ComboMemory faulty.
B: Algorithm code fail / alias ID missing:
-. Update FPS4 box with latest flash device list, try to update again. If fault persists, check values at D200, if OK, swap
the unit,- ComboMemory is faulty.
C: MCU boot failure, serial clock / data line failure
-. Connect “watchdog disable” R118 to GND.
1. Check Vbb 2.8V at C107 and Vxo 2.8V at C152. If not ok, continue with section “phone doesn't switch on".
2. Check SLEEPX 2.8V at J226. If not ok, MAD faulty in all probability. Swap the phone because MAD is not changeable.
3. Check PURX 2.8V at J227. If not ok, change CCONT (N100).
4. Check 13MHz REFCLK at C213, approx. 800mVpp. If not ok, check values around G830, N505 and V800.
5. Check resistance of Mbus/Fbus lines (J101-J103) to GND. Also check R109, R201, R203, R215.
-. Connect “watchdog disable” R118 to GND.
1. Check Vbb 2.8V at C107 and Vxo 2.8V at C152. If not ok, continue with section “phone doesn't switch on".
2. Check SLEEPX 2.8V at J226. If not ok, MAD faulty in all probability. Swap the phone because MAD is not changeable.
3. Check PURX 2.8V at J227. If not ok, change CCONT (N100).
4. Check 13MHz REFCLK at C213, approx. 800mVpp. If not ok, check values around G830, N505 and V800.
5. Check resistance of Mbus/Fbus lines (J101-J103) to GND. Also check R109, R201, R203, R215.
If update still not possible: Swap, MAD or PCB should be the reason.
Low standby / operation mode time
-. Check power consumption of phone: off state 0-1mA.
1. Lift L103, current consumption still to high: check C702/703/704 and C754/755. If failure persists, change N702.
1. Lift L103, current consumption still to high: check C702/703/704 and C754/755. If failure persists, change N702.
If current is OK after removing L103: Resolder it:
Vb line faulty.
2. In most cases CCONT (N100) is the reason. If fault persists after changing CCONT, probably N101, N220, N310, N401 faulty, also possible
that capacitor in Vb line Is faulty (eg C100, C105, C129, C142…).
-. Check current in sleep mode: 1-4mA.
-. Check resistance of output voltage lines of CCONT to GND.
-. Change components in corresponding lines if resistance is not ok. If resistance of lines is ok, but sleep mode current is still too high, change CCONT (N100).
-. Check charging circuit, run energy management calibration. If calibration is not ok, continue with section “Not charging".
-. Calibrate RX / TX values of the phone. If calibration not ok, continue with section “RX / TX faults”.
-. Check resistance of output voltage lines of CCONT to GND.
-. Change components in corresponding lines if resistance is not ok. If resistance of lines is ok, but sleep mode current is still too high, change CCONT (N100).
-. Check charging circuit, run energy management calibration. If calibration is not ok, continue with section “Not charging".
-. Calibrate RX / TX values of the phone. If calibration not ok, continue with section “RX / TX faults”.
Note that the standby time also depends on network side and the users handling of the phone, eg lights on/off, memory activities, games…
Contact Service
A: MCU ROM Checksum failed:
-. Try to flash the phone. If not ok after flashing, probably ComboMemory faulty, which is not changeable.
B: Ccont Interface failed:
-. Probably broken solderings under CCONT (N100). Replace CCONT (if not underfilled) with µBGA rework machine.
-. If not ok after reworking the CCONT, probably MAD or PCB faulty.
-. Try to flash the phone. If not ok after flashing, probably ComboMemory faulty, which is not changeable.
B: Ccont Interface failed:
-. Probably broken solderings under CCONT (N100). Replace CCONT (if not underfilled) with µBGA rework machine.
-. If not ok after reworking the CCONT, probably MAD or PCB faulty.
Note that it is necessary to run energy management calibration after changing CCONT!
C: Cobba parallel/serial failed:
1. Check Vbb 2.8V at C201 and Vcobba 2.8V at C248
2. Check CobbaClk at J252, probably broken solderings under COBBA (N250). Replace COBBA with µBGA rework machine.
1. Check Vbb 2.8V at C201 and Vcobba 2.8V at C248
2. Check CobbaClk at J252, probably broken solderings under COBBA (N250). Replace COBBA with µBGA rework machine.
If fault remains probably MAD or PCB faulty
D: DSP Alive failed
-. In most of all DSP alive selftest failures MAD is faulty, which is not changeable.
E: Eeprom tune checksum failed
-. Use Wintesla to check if phonedata like Imei, product-code or PSN are corruped
-. In most of all DSP alive selftest failures MAD is faulty, which is not changeable.
E: Eeprom tune checksum failed
-. Use Wintesla to check if phonedata like Imei, product-code or PSN are corruped
If phone data is ok, try to reset the phone. If phone data is not ok or fault remains
after reset ComboMemory is faulty in all probability
after reset ComboMemory is faulty in all probability
F: RTC Battery failed
-. First try to charge RTC battery by assembling battery to the phone for 10 to 15 minutes.
-. First try to charge RTC battery by assembling battery to the phone for 10 to 15 minutes.
If fault remains, check contact springs of battery, bend them if nessecary.
(see also NSM2 service bulletin 20)
(see also NSM2 service bulletin 20)
-. In some cases it can be necessary to change CCONT (N100) or CHAPS (N101).
Phone intermittend switches off
1. Check mechanical appearance of connector X101, change if necessary make sure that pads of X101 on PCB are clean.
2. Check amplitude of 32.768kHz at J228, 3.2Vpp squarewave, if not ok, check parts around B100, probably broken solderings under CCONT (N100).
-. Remove CCONT if not underfilled, replace sparepart with µBGA rework machine and run energy management calibration. The same problem may cause N505,
2. Check amplitude of 32.768kHz at J228, 3.2Vpp squarewave, if not ok, check parts around B100, probably broken solderings under CCONT (N100).
-. Remove CCONT if not underfilled, replace sparepart with µBGA rework machine and run energy management calibration. The same problem may cause N505,
because the reference oscillator G830 (26MHz) is divided to 13MHz system clock by Hagar N505.
-. If you suppose broken solderings under Hagar, rework as described above.
2
2
C
8
6
4
C
8
6
4
C703
C703
R
7
6
3
R
7
6
3
NSM-3 differences in red
Measurepoint for GND-connected components
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