GPRS Tri Band T260 Level 3 procedure Rev.1
mercoledì, gennaio 24, 2001
- MOTOROLA Level3 Authorized -
T260:
NO TX
START
Is it TX PWR
DOWN ?
M
Connect on J600 a
spectrum analyzer .
Put the Pcb in test mode
and digit 9823#, 110062#,
1215#, 310#.
Is there the signal but it is
LOW ?
C
Is there the signal
( 902.4Mhz DM_CS
modulated )
on pin 1 of U350 ?
C
Check the Bias on U350 :
- Pin 6 SF_OUT
(If NOT OK check L350,U200)
- Pin 5 TX275_DPCS
present if
select DCS/PCS chanel.
(If NOT OK GO TO
H
on pg.11)
- Pin 3 TX275_GSM
present if select GSM chanel.
(If NOT OK GO TO
H
on pg.11)
- Pin 2 TX_DCS
present if select DCS/PCS chanel.
(If NOT OK GO TO
I
on pg.12)
If All are
OK
check U350, U200
NOTE1 or Faulty.
NOTE1 : check if any components mentioned are
correctly positioned , have not dry joint and aren't
not phisically damaged .
NO
NO
NO
on pg.10
on pg.10
on pg.9
For most of Signals Use a
Test PCB as reference.
(these signals must change their
value, depend on chanel selected)
YES GO TO
pag.8
YES GO TO
YES GO TO