Kenwood TS-990S Operation Manual - Page 286

Microphone, ANT 1, PROC IN, PROC OUT, REMOTE, Select Active High + Relay Control for

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18 TROUBLESHOOTING Symptom Common Problem What to do Ref. Page No transmission. Low transmit power level. Incomplete connection of the microphone connector. Connect the microphone securely to the Microphone connector. {page 1-3} Poor connection of the antenna connector. Connect the antenna securely to the ANT 1 to ANT 4 connector. {page 1-1} The microphone gain is low. Adjust the microphone gain using the MIC control. {page 4-18} The transmit power is minimized. Adjust the transmit power using the PWR control. {page 4-19} The temperature protection activates. Stop transmitting to cool down the transceiver. {page 4-3} Carrier level is too low. Rotate the CAR control to adjust until the ALC meter readout indicates the appropriate range. {page 5-14} Output level from the speech processor Rotate the PROC IN, PROC OUT, or MIC is too low. control until the ALC meter readout indicates {page 9-6} the appropriate range. The selected audio source for Review the audio source to be modulated. transmission and the audio source {page 5-11} entered to the transceiver are different. Drive Output (DRV) is active. Press [DRV] to disable the Drive Output. {page 4-23} The microphone is not correctly connected. Review the connection. {page 1-3} Keyer or paddle is not correctly connected. Review the connection. {page 1-3} A peripheral device is not correctly connected. Review the connection. {page 1-2} The transceiver does not transmit. The PWR meter is inactive. The PTT switch is left and locked as On Unlock the PTT switch. while a stand microphone is in use. {page 2-11} The frequency is off band. Select the frequency from the amateur band. {page 4-8} TX Inhibit is active. Disable TX Inhibit in Menu 6-03. {page 16-27} While in transmission in SSB or AM mode, the The microphone gain is too high. Transmit your voice while observing the ALC background noise with no voice is high. meter and adjust the microphone gain to {page 5-14} slightly activate the Automatic Level Control. Input level of the speech processor is high. Rotate the PROC IN control until the COMP meter readout indicates the appropriate range. {page 9-6} The VOX function does not behave. The VOX gain level is too low. Adjust the VOX gain level. {page 9-3} The VOX gain level is too high. Adjust the Anti VOX Gain level. {page 9-4} Transmission begins without any operation. The VOX function is enabled, the VOX Disable the VOX function, or adjust the VOX Gain Level is not appropriate. Gain level. {page 9-2} The audio source entered from the rear Decrease the entered signal level. panel terminals is too high. {page 2-9} The audio signal is entered from the Disable the Data VOX, or review the connector which has been enabled as configurations for the audio source then adjust the audio source for transmission, and the VOX Gain level. {page 9-2} the same audio source is specified for Data VOX. You received a report from another station The microphone gain is too high. With the transmit monitor function, or with that your audio was distorted or clipped. having the other station monitoring, adjust the {page 4-18} microphone gain. Input level of the speech processor is With the transmit monitor function, or with high. having the other station monitoring, adjust the {page 9-6} input level of the speech processor. The linear amplifier does not behave. Poor connection to the REMOTE connector. Connect the amplifier securely to the REMOTE connector. {page 1-7} The audio source selected for Data Review the configuration for Data VOX and the VOX and the entered audio source are input signal level. {page 9-2} different or the input signal level is low. The control relay of the linear amplifier is Select "Active High + Relay Control" for the disabled. linear amplifier control from Advanced Menu {page 16-31} 11. While operating in CW mode using the The linear amplifier, such as the TL-922, Configure the linear amplifier by selecting linear amplifier, the Standing Wave Ratio is designed to gradually increase the "Active High + Relay & TX Delay Ctrl" momentary degrades or the Automatic Level transmit power. from Advanced Menu 11 and operate the {page 16-31} Control abnormally activates to increase the transceiver in Semi Break-in mode. transmit power. AT-300 does not behave. AT-300 was connected to something other than the ANT 1 connector. Connect the AT-300 to the ANT 1 connector. {page 1-9} A fuse in the transceiver is blown. Ensure that the fuse is genuine so as to be replaced after the cause of the problem has {page 18-2} been corrected. Modulation is insufficient (FM mode). The microphone gain is low. Review the configuration for Microphone Gain in Advanced Menu 13. {page 5-32} 18-8 Index Contents

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18 TROUBLESHOOTING
18-8
Index
Contents
Symptom
Common Problem
What to do
Ref. Page
No transmission.
Low transmit power level.
Incomplete connection of the
microphone connector.
Connect the microphone securely to the
Microphone
connector.
{page 1-3}
Poor connection of the antenna
connector.
Connect the antenna securely to the
ANT 1
to
ANT 4
connector.
{page 1-1}
The microphone gain is low.
Adjust the microphone gain using the
MIC
control.
{page 4-18}
The transmit power is minimized.
Adjust the transmit power using the
PWR
control.
{page 4-19}
The temperature protection activates.
Stop transmitting to cool down the transceiver.
{page 4-3}
Carrier level is too low.
Rotate the
CAR
control to adjust until the ALC
meter readout indicates the appropriate range.
{page 5-14}
Output level from the speech processor
is too low.
Rotate the
PROC IN
,
PROC OUT
, or
MIC
control until the ALC meter readout indicates
the appropriate range.
{page 9-6}
The selected audio source for
transmission and the audio source
entered to the transceiver are different.
Review the audio source to be modulated.
{page 5-11}
Drive Output (DRV) is active.
Press
[DRV]
to disable the Drive Output.
{page 4-23}
The microphone is not correctly
connected.
Review the connection.
{page 1-3}
Keyer or paddle is not correctly
connected.
Review the connection.
{page 1-3}
A peripheral device is not correctly
connected.
Review the connection.
{page 1-2}
The transceiver does not transmit.
The
PWR
meter is inactive.
The
PTT
switch is left and locked as On
while a stand microphone is in use.
Unlock the
PTT
switch.
{page 2-11}
The frequency is off band.
Select the frequency from the amateur band.
{page 4-8}
TX Inhibit is active.
Disable TX Inhibit in Menu 6-03.
{page 16-27}
While in transmission in SSB or AM mode, the
background noise with no voice is high.
The microphone gain is too high.
Transmit your voice while observing the ALC
meter and adjust the microphone gain to
slightly activate the Automatic Level Control.
{page 5-14}
Input level of the speech processor is
high.
Rotate the
PROC IN
control until the COMP
meter readout indicates the appropriate range.
{page 9-6}
The VOX function does not behave.
The VOX gain level is too low.
Adjust the VOX gain level.
{page 9-3}
The VOX gain level is too high.
Adjust the Anti VOX Gain level.
{page 9-4}
Transmission begins without any operation.
The VOX function is enabled, the VOX
Gain Level is not appropriate.
Disable the VOX function, or adjust the VOX
Gain level.
{page 9-2}
The audio source entered from the rear
panel terminals is too high.
Decrease the entered signal level.
{page 2-9}
The audio signal is entered from the
connector which has been enabled as
the audio source for transmission, and
the same audio source is specified for
Data VOX.
Disable the Data VOX, or review the
configurations for the audio source then adjust
the VOX Gain level.
{page 9-2}
You received a report from another station
that your audio was distorted or clipped.
The microphone gain is too high.
With the transmit monitor function, or with
having the other station monitoring, adjust the
microphone gain.
{page 4-18}
Input level of the speech processor is
high.
With the transmit monitor function, or with
having the other station monitoring, adjust the
input level of the speech processor.
{page 9-6}
The linear amplifier does not behave.
Poor connection to the
REMOTE
connector.
Connect the amplifier securely to the
REMOTE
connector.
{page 1-7}
The audio source selected for Data
VOX and the entered audio source are
different or the input signal level is low.
Review the configuration for Data VOX and the
input signal level.
{page 9-2}
The control relay of the linear amplifier is
disabled.
Select "Active High + Relay Control" for the
linear amplifier control from Advanced Menu
11.
{page 16-31}
While operating in CW mode using the
linear amplifier, the Standing Wave Ratio
momentary degrades or the Automatic Level
Control abnormally activates to increase the
transmit power.
The linear amplifier, such as the TL-922,
is designed to gradually increase the
transmit power.
Configure the linear amplifier by selecting
"Active High + Relay & TX Delay Ctrl"
from Advanced Menu 11 and operate the
transceiver in Semi Break-in mode.
{page 16-31}
AT-300 does not behave.
AT-300 was connected to something
other than the
ANT 1
connector.
Connect the AT-300 to the
ANT 1
connector.
{page 1-9}
A fuse in the transceiver is blown.
Ensure that the fuse is genuine so as to be
replaced after the cause of the problem has
been corrected.
{page 18-2}
Modulation is insufficient (FM mode).
The microphone gain is low.
Review the configuration for Microphone Gain
in Advanced Menu 13.
{page 5-32}