114 Servicing Procedure TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Task 5 —
Check User Interface
This task does not apply to the blank control head. Check the user
interface of one- and two-digit-display control heads as follows:
1. Check for any of the following faults:
■ LCD faulty
■ some or all LEDs faulty
■ some or all keys faulty
■ speaker faulty
■ volume control faulty
In the case of the function-key LEDs, note from the programming
file whether the back-lighting option is on or off.
2. If there is no fault, continue with Step 6. If there is a fault,
continue with Step 3.
3. Attempt to rectify the fault as described in Section 7
(on page 151). The final test in Section 7 will indicate whether
the repair succeeded or failed.
4. If the repair succeeded, continue with Step 5. If the repair failed,
conclude with the tasks of Subsection 5.3 (on page 121).
5. If the reported fault is unspecific, proceed to Task 6. If the
reported fault concerns the user interface — and this has now
been rectified — re-assemble the radio, if necessary, and conclude
with the tasks of Subsection 5.3.
6. If the reported fault concerns the user interface — and this has not
been confirmed — obtain more information from the Customer.
If the reported fault is unspecific, proceed to Task 6.
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