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START
Connect on J600 Ext_Conn. a RF
generator.
Set frequency of 947,4 Mhz,
Level -30 dBm, Put Pcb in Test
mode and digit 9821#, 450062#
Is it only GSM RX
problem ?
YES
Is there the correct
signal on Output of
FL400 ?
(947,4 Mhz)
YES
Is there the correct
signal on C405 ?
YES
Is there the correct
signal on output of
C453 ?
YES
Is there the correct
signal (400Mhz)
on C460 ?
YES
Check for intermittent
problem.
mercoledì, gennaio 24, 2001
GPRS Tri Band T260 Level 3 procedure
T260:
NO RX GSM
mode
NO
Check FL400 NOTE1
NO
or Faulty.
If OK check U150,
U151 NOTE1 or
Faulty.
Check the presence of
RX275 _GSM on
NO
collector of Q400.
P
If NOT OK go to
on pg.6
If OK check Q400
NOTE1 or Faulty.
NO
Check FL401 NOTE1
or Faulty.
Check the presence of RX275 on pin1
NO
of Q450 and the RX275_GSM (about
1,2 Volt) on L450.
If NOT OK go to
If OK check Q450 NOTE1 or Faulty.
NOTE1 : check if any components mentioned are
correctly positioned , have not dry joint and aren't
- MOTOROLA Level3 Authorized -
R
Is present the
RX__VCO signal
(1347,4Mhz) on
C2456 ?
YES
Is there 400Mhz
on C460 ?
YES
Is correct the
400Mhz on C480
?
YES
Is correct the
400Mhz on C481
?
P
on pg.6
not phisically damaged .
Rev.1
For most of Signals Use a
Test PCB as reference.
NO
Q
GO TO
on pg.7
(no RX_VCO)
Check Q450, U150
and U151 NOTE1
or Faulty.
NO
Check FL457.
NO
Check Q480
NOTE1 or Faulty.
NO
YES
Check
Q201,Q202,U200
then U800 NOTE1
or Faulty.
pag.4
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