Tait TM8000 Series, Service Manual

Page: 163 / 244

TM8100 Mobile Radio Service Manual Servicing of Control Head 163
May 2004 © Tait Electronics Limited
7.4 Replacement of Faulty Control-head Board
Replace Board
A faulty control-head board requires replacement in any of these
situations:
■
only level-1 repairs permitted
■
fault on board not located
■
repair of fault failed
If not already done, remove the faulty board as described in
Subsection 6.2 (on page 131) . Obtain a spare board from Spares kit 3 or
Spares kit 11. These kits contain replacement control-head boards for
two- and one-digit-display control heads respectively. (Check with TEL
regarding the availability of the kits.)
Re-assemble and
Test Control Head
Re-assemble the control head with the replacement control-head board
as described in
Subsection 6.5 (on page 148) . Reconnect the control-
head loom to the radio body, and test the user interface as described in
Task 5 of
Subsection 5.2 (on page 109) . If there is no fault, return to
Subsection 5.2 and continue with the servicing of the radio. If there is
still a fault, the repair failed; remove the spare board, re-assemble the
control head with the original board, and return to
Subsection 5.2 .