TC-508 Service Manual
78
Troubleshooting Flow Chart
TX Circuit
No
transmission
Start
Normal TX
power supply?
LED of D604
glows red
?
Check the TX
power supply.
TX VCO
locked?
Check the
TX VCO.
Check the
TX channel.
Replace
D604.
No sound
LED fails to
glow/flash.
Check the
antenna.
Check Q402,
Q403 and
Q404 .
Yes
No
Check the
APC circuit.
Low TX
power
Check the
voice channel
(MIC, D102)
Replace
D604.
Yes
No
No
Yes
Содержание TC-508
Страница 1: ......
Страница 88: ...TC 508 Service Manual 86 Packing Guide ...
Страница 89: ......
Страница 90: ......
Страница 91: ......
Страница 92: ......
Страница 102: ...8130050800100 ...