Contact Service - Cobba Serial - Nokia 6150 Service & Repair Hints

Contact service – COBBA serial
COBBA Serial
bus failed
Yes
Check VBB 2,8V
DC on pin 27, 53
of COBBA
Ok
Check VCOBBA
2,8V DC on pin
7, 12, 21, 25 of
COBBA
Ok
Check soldering
of COBBA or
change COBBA
Ok
Check soldering
of MAD or
change MAD
N250 COBBA faulty / poor soldering
•
Check VBB 2,8V DC on pin 27, 53 from COBBA
•
Check VCOBBA 2,8V DC on pin 7,12,21,25, from COBBA
•
Check COBBACKL 13MHz 3,2Vpp pin 45 from COBBA
•
Resolder COBBA
•
Internal error of COBBA
Note! Rewrite SIMLOCK and IMEI entries with use of the Nokia security SW (SSSW) and make a SW-update or
send this phones to the SACE, if this procedure is not permitted to you
version 1.0 / 19.10.1999
CONFIDENTIAL
Contact Service
Check via WINTESLA / Testing / Selftest
which kind of selftest is faulty
Check VBB 2,8V
DC on pin 55 of
No
N100, CCONT
Check VCOBBA
2,8V DC on pin
No
22 of N100
Service & Analysis Center Europe
Change or check
No soldering of
N100, C107
Change or check
soldering of
No
N100, C133
Training Team
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