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M
Remove U300.
Put in test mode the pcb.
Digit 9823#, 110062#, 1215#, 310#.
Is there on pin 2 and 8
the Negative Bias ?
(about -3Volt P/P)
N
Is present the -5Volt
on pin1 of Q370 ?
Is present the TX275
signal on pin4 of
Q370 ?
Is present the correct
signal on pin7 of
U390 ?
Check Q370/1/2/3
NOTE1 or Faulty.
mercoledì, gennaio 24, 2001
GPRS Tri Band T260 Level 3 procedure
For most of Signals Use a
Test PCB as reference.
YES
NO
Check the -5Volt on pin 1 of U903.
NO
YES
NO GO TO
YES
NO
YES
NOTE1 : check if any components mentioned are
correctly positioned , have not dry joint and aren't
- MOTOROLA Level3 Authorized -
O
Check the correct
DM_CS signal on Q381.
If NOT OK check U800
NOTE1 or Faulty.
Is correct the control
signal on pin 4 of Q380 ?
Replace U300 and rephase
the Phone.
Check if it is an
intermittent problem.
If NOT OK check U903,U904
NOTE1 or Faulty.
If OK check Q370 NOTE1 or
Faulty.
H
on pg.11
Check U390 and U200
NOTE1 or Faulty.
not phisically damaged .
Rev.1
T260:
TX PWR DWN
NO
Replace
Q381
YES
Check the presence of
PA_B+ signal on pin 5
and 8 of Q380.
If NOT OK replace
Q380.
pag.9
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