Introduction to baseband troubleshooting for analysis
This document describes in overview the different hardware error possibilities for the phone. Not every
possible hardware error is described, only those possible to correct.
Note:
Most components and test points are not accessible unless shielding cans are cut open. This
must ONLY be done by the Return analysis technicians and for analysis only!
Display information: "Contact service"
When this error appears in the display it means that one or more of the internal baseband tests has failed.
The baseband tests (self tests) are performed each time the phone is powered on. The self tests are divided
into those performed while powering up (Start up tests) and the ones that can be executed with a PC using
Phoenix (Runtime tests). The following Start-up tests are performed during power up:
UEM CBUS IF TEST
SLEEP X LOOP TEST
AUX DA LOOP TEST
EAR DATA LOOP TEST
TX IDP LOOP TEST
TX IQ DP LOOP TEST
SIM CLK LOOP TEST
SIM IO CTRL LOOP TEST
MBUS RX TX LOOP TEST
BACKUP BATT TEST
RADIO TEST
WARRANTY TEST
PA TEMP TEST
SIM LOCK TEST
PPM VALIDITY TEST
KEYBOARD STUCK TEST
LPRF IF TEST
FLASH CHECKSUM TEST
CAMERA IF TEST
EXT RAM DATA BUS TEST
EXT RAM ADDR BUS TEST
NAND FLASH ID TEST
BT WAKEUP TEST
IR IF_TEST
If all these self tests are passed, the phone will start up. From Phoenix it is possible to run all the self tests
and the additional “Runtime test”.
RM-82
Baseband troubleshooting for analysis
Nokia Customer Care
Issue 1
COMPANY CONFIDENTIAL
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