Kenwood TS-990S - Manual (Page 277)

TROUBLESHOOTING 18
18-7
Index Contents
TROUBLESHOOTING
Prior to requesting any after-sales service, read through the following list to troubleshoot common problems.
SYMPTOMS ENCOUNTERED DURING RECEPTION AND TRANSMISSION
Symptom Common Problem What to do Ref. Page
Screens do not appear correctly during the
power up ( ).
A microprocessor is erroneously active. Reset the transceiver.
{page 16-4}
Cannot receive even if the antenna is
connected to the transceiver.
The RX sensitivity is low.
The Squelch is open. Adjust the SQL control. If the transceiver is
used with a TNC, be sure that the DCD LED
on the TNC does not light.
{page 4-8}
The attenuator is active. Disable the attenuator. {page 6-1}
The preamplifier is active. Disable the preamplifier. {page 5-9}
Wrong antenna was selected.
The RX ANT is active.
Reselect the antenna.
Be sure that the RX ANT is inactive.
{page 4-21}
Cannot tune even if the antenna tuner is
active.
Press and hold [AT/TUNE] to tune. Or, stop
the antenna tuning.
{page 4-21}
The gain was reduced by the RF control. Rotate the RF control fully clockwise. {page 4-8}
The center frequency of the preselector
is deviated.
Reset the center frequency of the preselector
to the default.
{page 6-1}
Configuration for transverter is incorrect. Be sure that the transverter is correctly
configured (if the transverter is active), and is
properly working.
{page 16-33}
The transverter is active. If the transverter is active, be sure that the
transverter properly works.
{page 16-33}
The additional filter has been enabled
even though the additional filter is not
installed onto the transceiver.
Review the configuration for the additional
filter. {page 16-22}
The bandwidth for the preselector is
deviated.
Readjust the preselector (main band only).
{page 6-1}
The received signal cannot correctly be
demodulated.
The selected operating mode is
inappropriate.
Select other operating mode.
{page 4-10}
The AGC function was configured
inappropriately.
Configure the AGC function again.
{page 5-4}
The frequency cannot be changed even with
a rotation of the RIT or XIT control.
The RIT/XIT function is active. Press [RIT] or [XIT].
{page 5-13}
The treble and bass of the received audio in
SSB mode are excessively filtered.
Configurations for the RX DSP filter do
not match the operating environment.
Change the configurations.
{page 6-2}
The audio is distorted. The AGC function is active. Enable the AGC function, or adjust the RF
gain with the RF control.
{page 5-4}
The audio level is high due to the
position of the AF control.
Rotate the AF control to adjust the volume
level.
{page 4-7}
No audio sounds from the speaker. The AF control is excessively rotated
counterclockwise.
Rotate the AF control clockwise.
{page 4-7}
The SQL control is excessively rotated
clockwise.
Rotate the SQL control counterclockwise.
{page 4-8}
A set of headphones is connected. Disconnect the headphone. {page 1-2}
CTCSS tone is enabled in FM mode. Deactivating CTCSS {page 5-31}
The audio line is muted. Unmute the audio line. {page 4-7}
An external speaker is not correctly
connected nor configured.
Disconnect the external speaker, or review
the connection to and configuration for the
external speaker.
{page 1-3}
With the stereo headphone, the audio sounds
from one channel.
In Menu 1-07, configuration for the
mixing balance specifies only one
channel.
Review the configuration for Menu 1-07.
{page 4-23}
In FM mode, the performance of S meter is
dull.
Sensitivity of S meter is low. Select "High" for S meter sensitivity in Menu
0-08.
{page 5-29}