Tait TM8235, Service Manual

Page: 152 / 578

152 Servicing Procedures TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
Task 4 —
Read the
Programming File
Given that the radio powers up, the next task is to read the radio’s
programming file or upload a default file.
1. Use the programming application to read the programming file.
2. If the programming file can be read, save a copy on the test PC, and
go to
Task 5 . If not, go to Step 3 .
3. If it seems that the file cannot be read, cycle the power to the radio
and again attempt to read the file. First cycling the power is essential
if the radio is programmed to power up in transparent-data mode
(both 1200 baud FFSK and Tait high-speed data) and if the selected
data port is the microphone connector (control head with user
interface) or programming connector (blank control head).
4. If the programming file cannot be read, check whether:
■
the radio is connected to the correct serial port of the test PC,
■
the Mode switch of the test unit is set to Rx,
■
the programming application is set-up correctly. Refer to the
troubleshooting section of the online help.
5. If the programming file can be read now, save a copy on the test PC,
and go to
Task 5 . If not, go to Step 6 .
6. Check whether the control-head loom, the control head or the radio
body is faulty by first connecting a spare control-head loom and then
a spare control head.
7. If the control head is faulty, check:
■
the control-head connector (pin 3: TXD, pin 7: RXD),
■
the microphone or programming connector,
■
the path between the control-head connector and the microphone
or programming connector,
and repair or replace the control-head board.
8. If the repair succeeded without the need for replacing the main-board
assembly, go to
Step 9 . Otherwise continue with Step 10 .
9. If the programming file can be read now, save a copy on the test PC,
and go to
Task 5 . If the file still cannot be read, go to Step 10 .
10. Set up a suitable default programming file and attempt to upload it to
the radio
11. If the upload succeeds, go to Task 6 . If the upload fails, continue with
Step 12 .
12. If the main-board assembly was replaced or if the repair failed, re-
assemble the radio as described in
“Disassembly and Reassembly” on
page 129 . Conclude with the tasks of “Final Tasks” on page 157 .