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Customer Care Europe, Middle East & Africa
SCCE Training Group
SIMCARD FAULTS
Display message "Insert SIMcard"
The easiest way to find out the reason for this fault is to check if every single SIMline is pulsed to the signal shown below
after initializing the phone:
Figure 9-1
You can check this signal easily at the SIMreader`s pogo-pins of the service-jig.
The signal must be measurable at all pins except the ground pin.
If the above-mentioned signal is ok at all five pogo-pins, check mechanical appearance of SIMreader. Also check if
contact-pads for SIMreader on PCB are clean.
If the signal shown above is not measurable at one SIMline, check this line for interruption or short-circuit to ground.
Resistance of VSIM to GND normally is around 230 k? , resistance of SIMdata to GND is around 250 k?
while resistance of SIMreset and SIMclock to GND normally is around 5 M? .
In case that resistance of any line is not ok, especially check V203 and capacitors C221/222/224/225.
If resistance of lines to ground is ok but SIMlines are not pulsed to 3/5 Vpp, remove CCONT N201 with µBGA rework machine.
In case of oxidized pads under CCONT, rework them with a few flux and solder, then replace the spare part.
Remember that it is necessary to run the energy management calibration after changing CCONT!
In case the fault persists after changing CCONT N201 probably the SIMinterface between MAD and CCONT is interrupted or
the MAD itself is defect. Note that the MAD is underfilled and therefore not changeable.
Display message "SIMcard not accepted"
In case of this fault use WinTesla to open Quick /RF-Info window and compare the shown SIMlock-data with the entries of the
SIMlock-list for the respective product-code.
If SIMlock-settings are ok or no SIMlock is set, it is necessary to change the COBBA N100.
In case that oxidized pads exist under COBBA, rework them with a few flux/solder and replace part with µBGA rework machine.
Note that you have to rewrite SIMlock-settings, make SW-update and retune RX/TX-values after changing COBBA!
© NMP 2002
CONFIDENTIAL
NHM—2/5/6
3410
Date 20.11.2002
Checked by:
Customer Care E&A
29 (44)
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Version 4.0 Approved
Approved by:
SCCE Training Group
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