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Put in test mode the phone and digit 38#
Are there following signals on J803 SIM
- Pin 3 VSIM1 = 3/5 V
- Pin 1 CLK = 3,25 MHz frequency
- Pin 4 SIM_I/O = DATA SIGNAL
faulty then in sequence
U800, U900 NOTE1 or
Check following supply lines for any short to ground or
differents resistences comparing with a good PCB:
If you found some difference Check the components which
If you don't found any difference send PCB to HTC
mercoledì, gennaio 24, 2001
GPRS Tri Band T260 Level 3 procedure
For most of Signals Use a
Test PCB as reference.
( enable SIM ).
conn. correct ?
YES
Check for intermittent
faulty.
Check in order :
J604 connector for Dry joint problem;
Q901 NOTE1 or faulty;
J600 and On/Off Mylar contacts;
GcapII U900 NOTE1 or faulty.
B+ on C915
V_BOOST1 on C913
V_REF on C919
V1 on C906
V2 on C939
V3 on C910
VSIM1 on C905.
use that Voltage.
NOTE1 : check if any components mentioned are
correctly positioned , have not dry joint and aren't
not phisically damaged .
- MOTOROLA Level3 Authorized -
Rev.1
NO
For VSIM1 problem Check U900 NOTE1 or faulty.
For SIM_I/O Check R945,R938 and U901 NOTE1 or
faulty.
For Clock signal Check R940,R941 and U900 NOTE1 or
faulty.
T260:
CHECK CARD
T260:
NO POWER UP
USING
BATTERY.
T260:
DRAW
CURRENT
WHEN IT IS
OFF
pag.20
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