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Contact service COBBA parallel /serial bus fail
Check via WINTESLA / Testing / Selftest
COBBA parallel/
serial bus failed
Yes
check COBBACLK
13MHZ/ 3,2Vpp on
not oK
J201
oK
check VBB 2,8V on
not oK
C117
oK
Check VCOBBA 2,8V
not oK
DC on C148
oK
Check COBBA reset
pulse during
not oK
initialisation routine
on J343 (see diagram)
oK
Change the COBBA
version 1.0 / 05.11.1999
CONFIDENTIAL
Contact Service
which kind of selftest is fail
Check 13MHz RFC
on C301
oK
swap the phone
because MAD or PCB
should be the reason
check soldering or
change N100, C117
Change or check
soldering of N100,
C148
swap the phone
because MAD or PCB
should be the reason
check soldering or
not oK
change G701, V702
Service & Analysis Center Europe
Training Team
Page 15 of 37
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