Tait TM8100 mobiles, Service Manual

Page: 309 / 620

TM8100/TM8200 Service Manual Transmitter Fault Finding (>25W) 309
© Tait Electronics Limited November 2007
switch or LPF or both are suspect; go to Task 33 . If there is a fault,
go to Step 11 .
10. In the buffer amplifiers, check R340 (see Figure 11.9 for VHF,
Figure 11.17 for UHF, and Figure 11.19 for the K5 band) and
R341 (see Figure 11.17 , Figure 11.18 , and Figure 11.19 ).
11. Repair any fault revealed by the above checks. Replace IC303 if none
of the other components is faulty (see Figure 11.9 and
Figure 11.10 ).
12. Confirm the removal of the fault and go to “Final Tasks” on
page 163 . If the repair failed, replace the board and go to “Final
Tasks” on page 163 .
Figure 11.16 Circuitry under the
DIRC TOP
can
K5 band
UHF
VH
F