CONFIDENTIAL
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Customer Care Europe, Middle East & Africa NHL-4u/NHL4/NHL-4j Repairhints
SCCE Training Group 6610/7210/7250 Version 3.0
2003 Nokia Mobile Phones
Date 21/05/2003
© NMP 2003
Checked by:
SCCE Training Group
Approved by:
CC Europe, Middle East & Africa
Insert SIM card
Pre-check:
Put a SIM card into the phone and turn it on.
o If “Insert SIM card” still appears on display after a few seconds, follow repair instructions:
“Insert SIM card”
Insert SIM card
There are two ways to check the SIM lines. See below:
First way:
Set the repair jig MJS-38 to local mode, the power supply to 4VDC, and the oscilloscope to 500mV/div. Hold the probe on
Pin 1. Now connect the power supply to the jig. For a short moment the flat line jumps up. Repeat this procedure with
pin 2,3 and 6. Do not forget to disconnect the power supply after every measurement.
If one or all four lines do not react when connecting the power supply, continue with fault finding as described in the
second way.
Second way:
Note! This signal is only measureable with digital oscilloscope and a removed SIM card directly after switching on the
phone.
Check VSIM = 3VDC at X386 Pin3.
VSIM Figure 3
Delay: 22ms singel shot activ
If not ok, check R386, C203, C390 and X386 for shorts, disconnetions and mechanical damages, and change or resolder
faulty components if necessary.
If the upper listed components are ok, check resistance of VSIM line = 10 Ohm between C203 and X386 Pin3.
If the resistance is much higher, check R386 if broken and change it if necessary; otherwise change PWB.
If the line is ok, change R388. If the fault persists, change UEM D200.
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