TM8100/TM8200 Service Manual
Fault Finding of Control Head with Graphical Display
405
© Tait Electronics Limited
June 2006
14
Fault Finding of Control Head with
Graphical Display
Overview
This section describes the fault finding of the control head with graphical
display for the following faults:
■
power supply faulty (initial check)
■
LCD display faulty
■
LCD backlighting faulty
■
LCD contrast faulty
■
LCD heating faulty
■
function key LEDs or status LEDs faulty
■
keypad backlighting faulty
■
ON
/
OFF
key faulty
■
function, scroll, or selection keys faulty
■
speaker faulty
■
volume control faulty
■
PTT faulty
The faults can be detected by visual inspection (refer to
) or using the CCTM commands in
General
The following applies for all fault finding procedures:
Important
Do not disconnect or connect the control head while
power is supplied to the radio.
■
To connect to ground use one of the screw bosses of the metal
spaceframe or the screw bosses of the radio body.
■
If the radio does not switch on when power is supplied, the radio may
be programmed to go into the status it was in when powered down.
Connect a known good control head, power up the radio, and change
the relevant setting in the programming application. Remember to
program the original setting before returning the radio to the customer.
■
For disassembly and re-assembly instructions, refer to
and Reassembling the Control Head” on page 141
■
If the repair fails or no fault could be found, replace the control-head
board.
■
After completing the repair, carry out the tasks in
.
Summary of Contents for TM8235
Page 1: ...TM8100 mobiles TM8200 mobiles Service Manual MMA 00005 04 Issue 4 June 2006...
Page 10: ...10 TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 62: ...62 Description TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 148: ...148 Disassembly and Reassembly TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 162: ...162 Servicing Procedures TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 178: ...178 Interface Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 258: ...258 Receiver Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 446: ...446 Spare Parts TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...