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TX SECTION CHECK
Does not transmit
Check the CB/WX
switch and the
connections.
OK
Check whether
TX LED turns on.
Check the voltage at
OK
See PLL
section.
Check the voltage
of Q501.
OK
Check the
voltages of Q201, 202
and Q203.
OK
Check the Modulation.
OK
Good
Defective or bad contact in
NG
antenna connector, or defective
CB/WX switch.
NG
NG
pin 1 of IC401.
OK
Check the
voltage at pin 10 of IC401.
(PTT ON: 5 V,
PTT OFF: 0 V)
OK
Check the
NG
voltage at Pin 10 of IC301.
(PTT ON: 5V)
OK
Check the voltage at
Q402 and Q406.
OK
NG
Replace Q501.
NG
Replace Q201, 202
and/or Q203.
NG
Check the Microphone
and MIC jack.
OK
Check the
voltage Q204, 205, 206,
Q207, 208, 209.
OK
Good
NG
Check the
MIC and JACK.
OK
Check the
soldering between
Front and Main
PCBs.
OK
See system control section.
NG
Replace Q402 or Q406.
NG
Replace Microphone or
MIC jack.
NG
Replace defective parts.
— 15 —
NG
Change MIC.
NG
Resolder.
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