Advertisement
C
Is the signal on base
of Q330 correct ?
Is the signal on base
of Q331 correct ?
Is correct the signal
on pin7 of U300 ?
Is correct the signal
on pin 1 of U150 ?
Check the Bias of U300 :
- Pin 2 and 8 the Negative control
from "gate control"
(If NOT OK go to
- Pin 10 to 15 the PA_B+ signal
(If NOT OK go to
If All are OK check U300, CR301/2/3/5 NOTE1
or Faulty.
mercoledì, gennaio 24, 2001
GPRS Tri Band T260 Level 3 procedure
For most of Signals Use a
Test PCB as reference.
NO
YES
NO
YES
NO
(If NOT OK check U390 and U200
YES
YES
NO
N
on pg.9).
O
on pg.9).
- MOTOROLA Level3 Authorized -
Check U350 and the
components to Q330
NOTE1 or Faulty.
Is present the Bias on Q330 :
(TX275) from TX Control Matrix ?
H
If NOT OK go to
on pg.11
If OK check Q330 and the components to
Q331 NOTE1 or Faulty.
Check the Bias of Q331 :
B+ from R337
The gate control from U390
NOTE1 or Faulty).
Check U150, U151 and
relative control signal
NOTE1 or Faulty.
NOTE1 : check if any components mentioned are
correctly positioned , have not dry joint and aren't
not phisically damaged .
Rev.1
T260:
NO TX
pag.10
Advertisement
