Nokia 6150 - Contact Service - Cobba Parallel Bus Failed

CONFIDENTIAL
Service & Analysis Center Europe
Training Team
version 1.0 / 19.10.1999 Page 15 of 41
Contact service – COBBA parallel bus failed
COBBA parallel bus
failed
Contact Service
Check via WINTESLA / Testing / Selftest
which kind of selftest is fail
check COBBACLK
13MHZ/ 3,2Vpp on
pin 45 0f COBBA
check soldering or
change N100, C107
check VBB 2,8V on
pin 27, 53 of COBBA
Ok
Check VBB 2,8V DC
on pin 55 of N100,
CCONT
Check VCOBBA 2,8V
DC on pin 7, 12, 21,
25 of COBBA
Check VCOBBA 2,8V
DC on pin 22 of
N100, CCONT
Change or check
soldering of N100,
C133
Check COBBA Clk on
pin 144 of MAD
Change or check
soldering of MAD
Check soldering of
MAD or change MAD
Yes
No
No
No
No
Ok
No No
Ok
Check soldering of
COBBA or change
COBBA
Ok