Kenwood TS-430S Instruction Manual page 24

The problems described in this table are failures caused in
general by improper operation or connection of the trans-
-cHHEE CH cH
SECTION 7. TROUB
i to-ctn
ceiver.
ceiver, not by defective components.
TRANSMITTER AND RECEIVER CIRCUITS
SYMPTOMS
CAUSE
LE SHOOTIN
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There is a separate Service Manual for repair of the Trans-
REMEDY
Pilot lights do not light and there is no
receiver noise when the POWER switch
is turned on.
Power cord disconnected or AC power OFF.
Loose power connector.
Blown fuse.
PS-430 POWER switch OFF.
Connect power cord.
Turn AC power ON.
Reconnect.
Replace fuse (If fuse blows again, contact service
station.)
Turn ON the PS-430 power switch.
RECEIVER SECTION
No signals received with antenna con-
nected.
Standby or microphone PTT switch is in transmit
position,
Place switch in receive position.
S-meter deflects without signals,
1. Power supply voltage is too low.
2. RF gain is too low.
. Adjust voltage to 13.8V DC (12 ~ 16V DC).
Reset voltage selector to correct local AC line
voltage (PS-430).
2. Turn RF GAIN control fully clockwise.
SSB signal unintelligible.
Wrong sideband. Set MODE switch to alternate SSB position.
.SSB received signal is high or low cut. IF SHIFT is out of adjustment. Set to the center position (click).
Frequency remains the same when
RIT control is adjusted
RIT switch is OFF.
Depress RIT switch ON.
No output.
Standby switch not in transmit position. CAR
or MIC control in minimum position.
Turn CAR or MIC clockwise.
No SSB output. 1. MIC plug loose.
2. MIC control in minimum position.
Reconnect.
Turn MIC control clockwise.
FMing in sideband operation. Unstable or insufficient Power Supply.
Adjust voltage to 13.8V DC (12 ~ 16V DC).
Reset voltage selector ro correct local AC line
voltage (PS-430),
VOX circuit inoperative
1. VOX control in minimum position.
2. VOX switch in MAN position.
1. Turn VOX control clockwise.
2. Set VOX switch to VOX.
VOX operates by sound from speaker. ANTI VOX setting incorrect.
Turn ANTI VOX control clockwise.
VOX circuit releases between words or
holds too long.
VOX time hold control requires adjustment.
Adjust delay control.
Signal reports of distortion
Too much microphone gain.
Reduce MIC control.
Mic or radio chassis is "hot" during TX. Excess RF in the shack. No earth ground, poor
ground, or antenna is too close to the radio.
1. ANT too close to X CVR.
2. Poor mic GND.
3. Poor or excess length GND less.
Poor audio in SSB
24
TX-feedbackExcess RF in the shack.