Troubleshooting - Nokia NSB-7 Series Service Manual

PAMS Technical Documentation
can be calibrated. Calibration is included in VBATT A/D reading task.

Troubleshooting

Troubleshooting instructions are divided into following sections:
How to check/fix the system/sleep clock.
How to check/fix the power supplies.
Contact service case.
How to check/fix the SIM faults.
How to check/fix the Audio faults.
How to check/fix the charger faults.
The first thing to do is to carry out a thorough visual check of the module. Make sure
that:
- there are no mechanical damages
- solder joints are OK
Before changing anything ALL SUPPLY VOLTAGES AND SYSTEM CLOCK / SLEEP CLOCK
should be checked.
26MHz VCXO
G830
HAGAR
N505
/2
Issue 1 06/00
Clock signal
buffer
V800++
13MHz MAD
C213
ãNokia Mobile Phones Ltd.
Disassembly & Troubleshooting
NSB-7
Page 23