358
Transmitter Fault Finding (25W)
TM8100/TM8200 Service Manual
© Tait Electronics Limited
June 2006
9.
Remove the
DIRC
TOP
can.
10.
Check the components of the directional coupler (see
)
and go to
11.
Check
R340
between pins 6 and 7 of
IC303
in the buffer amplifier
(see
), and then go to
.
12.
Repair any fault revealed by the above checks. Replace
IC303
if none
of the other components is faulty (see
).
13.
Confirm the removal of the fault and go to
. If the repair failed, replace the board and go to
.
Task 23 —
Power Control
for PA Driver
In this task any faults in the path between the power-control circuit and the
PA driver will be located, as well as any fault with the PA driver.
1.
Check for short circuits at the gate of the PA driver
Q306
. Check
R333
,
R336
(see
C310
,
R324
and
R327
(see
) between the power-control circuit and Q306.
2.
Repair any fault revealed by the checks in
. If none of the
above-mentioned components is faulty, replace
Q306
(see
).
3.
Confirm the removal of the fault and go to
. If the repair failed, replace the board and go to
.
Summary of Contents for TM8235
Page 1: ...TM8100 mobiles TM8200 mobiles Service Manual MMA 00005 04 Issue 4 June 2006...
Page 10: ...10 TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 62: ...62 Description TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 148: ...148 Disassembly and Reassembly TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 162: ...162 Servicing Procedures TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 178: ...178 Interface Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 258: ...258 Receiver Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 446: ...446 Spare Parts TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
