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RM-4/RM-5
Troubleshooting Instructions
SIM related faults
The hardware of the SIM interface from UEM (D200) to the SIM connector (X387) can be tested
without a SIM card. When the power is switched on the phone first check for a 1.8V SIM card
and then a 3V SIM card. The phone will try this four times, whereafter it will display "Insert SIM
card".
Ch1: VSIM
Ch2: RESET
ISSUE 1 02/2004
Display shows :
"Insert SIM Card"
Yes
X387
Verify that phone checks for
1,8V-SIM, and then 3V-SIM
during power-up.
(See illustration below)
Yes
SIM Interface OK
Check for SIM voltage during power-up
COMPANY CONFIDENTIAL
Copyright © 2003 Nokia. All Rights Reserved.
CCS Technical Documentation
Check :
X387, R386, PWB.
Else defective D200*
No
Message can also appear if
BSI signal from battery is not
present or only working
intermittently .
Please check BSI.
Ch3: CLOCK
Ch4: DATA
13
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Troubleshooting
