Tait TM8000 Series, Руководство по обслуживанию

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TM8100 Mobile Radio Service Manual Servicing of Main Board 169
May 2004 © Tait Electronics Limited
8.3 Replacement of Faulty Main-board Assembly
Replace Assembly
A faulty main-board assembly requires replacement in any of these
situations:
■
only level-1 repairs permitted
■
fault on board not located
■
repair of fault failed
■
required repair is level-3 repair
If not already done, remove the faulty main-board assembly from the
chassis as described in
Subsection 6.3 (on page 137) . Obtain a
replacement assembly. The product codes for spare main-board
assemblies are listed in
Table 4.4 of Subsection 4.2 (on page 84) . Install
the replacement assembly in the chassis as described in Subsection 6.4
(on page 144) .
Calibrate and
Program Radio
Connect the radio to the test equipment. Calibrate and program the
replacement main-board assembly in the same way as the faulty assembly.
Use the files downloaded as described in Tasks 2 and 4 of
Subsection 5.2
(on page 109) . If a file could not be downloaded, use the default file.
Test Main-board
Assembly
Carry out the basic tests given in Subsection 5.2 to confirm that the
replacement main-board assembly functions as required. If there is no
fault, re-assemble the radio as described in
Subsection 6.4 and
Subsection 6.5 (on page 148) , and conclude with the task discussed
below. If the tests do not confirm the proper functioning of the radio,
the repair failed; remove the spare assembly, re-assemble the radio with
the original assembly, and return to
Subsection 5.2 .