TM8100/TM8200 Service Manual
Transmitter Fault Finding (40W/50W)
309
© Tait Electronics Limited
June 2006
Task 29 —
Output of Third
Stage of Exciter
If the output of the second stage of the exciter circuit is correct, check that
of the third and final stage at C307.
1.
With the radio still in transmit mode, measure the RF voltage after
C307
(see
). (Use an RFP5401A RF probe or the
equivalent.) The required voltage should be as given in
(B1),
(H7).
2.
If the voltage is correct, go to
. If it is not, go to
3.
With the radio still in transmit mode, measure the RF voltage at the
junction of
R3525
and
C3512
(see
). The voltage
should be:
4.
Enter the CCTM command
32
to place the radio in receive mode.
5.
If the voltage measured in
is correct, go to
. If it is not,
go to
6.
Check the components around
Q3504
(see
). Repair
any fault. Replace Q3504 if none of the other components is faulty.
Conclude with
7.
Check the components around
Q3505
(see
). Repair
any fault. Replace Q3505 if none of the other components is faulty.
8.
Confirm the removal of the fault and go to
. If the repair failed, replace the board and go to
.
junction of R3525 and C3512: 1.3
±
0.2V (VHF)
1.8
±
0.2V (UHF)
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...
