User Guide

NPM-10 (3595)
Troubleshooting - BB CC Technical Documentation
Page 8 ©2004 Nokia Corporation Confidential Issue 2 03/2004
Display Information: "Contact Service"
This error can only happen at power up where several self-tests run. If any of these test
cases fail, the display shows the "Contact Service" message.
These are individual test cases, so the following list of possible errors has no
chronological order. Use common sense and experience to decide where to begin error
hunting.
Figure 5: Display shows “Contact Service”
Display shows
“Contact Service”
EarDa and MicDa
between UPP and UEM?
MBUS interface between
UPP and UEM?
AuxDa and UEMInt
between UPP and UEM?
SleepX and SleepClk
between UPP and UEM?
TXI/QD and RXI/QD?
SIM interface between
UPP and UEM?
Key is stuck
Flash checksum
y ASIC version vs. compilation flag, PMM checksum
y PMM validity
y Warranty Information State
y SIM-Lock
Yes
No
CHECK:
PWB. Else defective D200* or
D400*
CHECK:
A-cover, key mat, light guide,
PWB.
CHECK:
PWB.
Else defective D450 (FLASH)
R205
Check R205
(no short/open-circuit)
Reflash phone
Error Still Present