Motorola T189 Service Manual page 79

START
Is thermistor problem ?
(check it using gate22
processing test)
NO
Put the phone in
test mode and
digit 500255#
Is there on pin3 of
Q900 about EXT_B+
voltage ?
YES
Is there 0Volt on pin4
of Q900 ?
YES
Is there about EXT_B+
voltage on pin4 of J604
YES
Check for intermittent
problem.
YES
Is there 2,7Volt on
terminal on pin 2 of
Without battery, Is there
2,7Volt on pin1 of U905 ?
(with battery it must be
NO
Check R913
NO
Check U900 NOTE1
or Faulty.
NO
Check Q900 NOTE1
or Faulty and J604
NOTE1.
NOTE1 : check if any components mentioned are
correctly positioned , have not dry joint and aren't
- MOTOROLA CONFIDENTIAL PROPRIETARY -
Dual band Taishan level 3 debug rev 1.0
BATT_THERM
J604 ?
YES
0Volt).
YES
not phisically damaged .
Taishan:
NO
CHARGER
NO
Check Q914 and U905
NOTE1 or Faulty.
NO
Check U905 and Q908
NOTE1 or Faulty.
Check U800 NOTE1
or Faulty.
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