Nokia RH-18 - Display Information: Contact Service

CCS Technical Documentation
Company confidential RH-18/36/38
Issue 1 10/03 Nokia Corporation. Page 9
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".
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.
Figure 4: Troubleshooting when Contact Service message seen
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
Reflash phone
Check :
PWB.
Else defective D450 (FLASH)
Check :
A-cover, Keymat, Lightguide,
PWB.