Nokia 3510 서비스 매뉴얼
NHM-8NX
Troubleshooting Instructions
PAMS Technical Documentation
Page 10
ãNokia Corporation
Issue 1 05/02
Display information: "Contact Service"
This error can only happen at power up where several self-tests is run. If any of these test
cases fails the display will show the message: "Contact Service".
cases fails the display will show the message: "Contact Service".
It's individual test cases so the below lineup of error hunting's has no chronological
order. Use common sense and experience to decide which test case to start error hunting
at.
order. Use common sense and experience to decide which test case to start error hunting
at.
Display shows
"Contact Service"
EarDa & MicDa
between
UPP and UEM?
Check :
PWB.
Else defective D200*
or D400*
MBUS interface
between
UPP and UEM?
AuxDa & UEMInt
between
UPP and UEM?
Yes
No
SleepX & SleepClk
between UPP & UEM?
Key is stucked
TXI/QD & RXI/QD?
SIM interface between
UPP & UEM
Flash checksum
ASIC version vs. compilation flag, PMM checksum
PMM validity
Warrenty Information State
SIM-Lock
R205
Check R205
(no short/open-circuit)
Error still present
Reflash phone
Check :
PWB.
Else defective D450 (FLASH)
Check :
A-cover, Keymat, Lightguide,
PWB.