Troubleshooting - Kenwood TS-711A Instruction Manual

The problems described in this table are failures caused in
general by improper operation or connection of the trans-
TROUBLESHOOTING
ceiver.
ceiver, not by defective components.
Transmitter Section
Symptom
Cause
There is a separate Service Manual for repair of the Trans-
Remedy
No output (SSB).
© Poor contact of the MIC-plug.
@ Mic control set minimum.
© Plug the MIC plug firmly.
@® Adjust MIC control clockwise.
In CW mode, no transmission
when KEY pressed down.
KEY plug not connected properly.
KEY has poor contact point.
Check the KEY plug.
Clean KEY contact point.
Pressing PTT switch does not
allow transmission.
Receiver Section
Symptom
Due to high temperature transmission
prevented by protection.
Cause
Set to reception mode and cool enough
for transmission.
Remedy
No light and no display with
POWER switch ON.
@ Check AC plug connection.
@® DC short plug not connected.
@® Fuse blown.
@® Connect firmly.
@® Connect the plug.
@® Replace fuse.
If it blows again, check the trans-
ceiver.
Signal not received even the an-
tenna connected.
@® Sauelch activates.
@ Transmit mode is used.
@® ATT switch set to ON to reduce sen-
sitivity.
© Rotate squelch control counterclock-
wise.
@ Release PTT switch for reception.
@® Set the ATT switch to OFF.
Signal is not received even the
antenna connected. S meter is
fully deflected.
RF gain is lowered by RF control. Rotate the RF control fully clockwise.
An antenna is connected but no
signals are heard.
Microphone PTT switch (or stand-by
switch) is in the transmit position.
Release the PTT swith.
An antenna is connected but S-
meter deflects without a re-
ceived signal.
@ RF GAIN control closed.
@ Low AC line voltage.
@ Open RF GAIN control.
@ Use a step-up transformer to raise the
line voltage.
SSB signal unintelligible.
MODE switch is set to wrong sideband. Turn MODE switch to the correct side-
band.
Current status would not
change.
Lock switch set to ON.
COM switch set to ON.
Set it to OFF.
Press the COM switch again to switch
to VFO.
Press the VFO/M switch to set
Mch mode, indication disap-
pears.
When memory has no data, the display
indicates CH number and
Enter necessory data.
Display is dimmed.
DCS does not activate.
22
AC line voltage is low.
Mode other than FM is set.
Rase the line voltage up to your local vol-
tage by boost transformer.
For DC, use the one 12 - 16V.
Set to FM mode.