Charger Faults - Nokia 7088 Troubleshooting Manual

7088 (Flower)
Base band Description and Troubleshooting

Charger Faults

Charger
Faults
Connect the charger
and make sure the
battery is
connected.
Check VBATT_ID. Is it
about 75k Ohm or 81k
Ohm in battery?
YES
Measure voltage at
VEXT_DC (TP161).
Is it >4.5V?
YES
Read MOBILE
TERMINAL_THERM
value. Is it room
temperature?
YES
Measure voltage
between pin#1 and pin#3
of Q400. Is it >0.7V
YES
Change Q400
Page 34 © 2006 Nokia Corporation
Check/ change DC
Jack, C108, C109,
NO
R110 and
VDD_MSMA.
Check/ change DC Jack,
F1, L101, D1006, D1007,
NO
C1030, C874, R864 and
Q400.
Check NTC R4021and
R300. Are they OK?
NO
YES
MSM6025 is defective,
phone can not be
repaired and must be
replaced.
Check R851.
NO
Is it OK?
YES
Reheat solder joints or
change PM 6610
Company Co
Replace
NTCR4021,
NO
R300
Reheat solder joints/
NO
change R851
nfidential Issue 1 12/20 06