CCS Technical Documentation
Baseband Troubleshooting Instructions
Issue 1 10/02
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Nokia Corporation
Page 33
Figure 43:
X303 PIN 2: KEYB_LIGHT, BACKLIGHT CIRCUITRY (V300 pin 6) -> UI CONNECTOR (X303 pin 2)
Troubleshooting steps
The following hints should help to find the cause of the problem when the circuitry
seems to be faulty. This troubleshooting instruction is divided into sections.
1 Phone is totally dead
2 Power does not stay on or the phone is jammed
3 Flash programming does not work
4 Display is not working
5 Plug in SIM card is out of order (insert SIM card).
6 Audio fault
7 Charging fault
The first thing to do is carry out a through visual check of the module. Ensure in particu-
lar that:
a) there are no mechanical damages
b) soldered joints are OK.
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