Kenwood TS-850S Instruction Manual page 73

6-4. IN CASE OF DIFFICULTY
RECEPTION
Symptom Probable cause
Corrective action
Indicators do not light and no
receiver noise is heard when the
POWER switch is turned on.
1. Bad power cable or connections.
2. Blown power supply fuse.
3. Power supply is OFF.
1. Check cables and connections.
2. Check for the cause of the
blown fuse and replace the fuse.
3. Switch power supply ON.
Nothing is displayed or improper
digits are displayed when the
POWER switch is turned on.
The microprocessor may
malfunction if the input voltage is
too low.
1. Use a step-up transformer to
raise the line voltage to the
power supply. Use a 12 to 16 V
battery.
2. Turn on the POWER switch
while depressing the A=B (or
RX-A) key, and then release the
A=B (or RX-A) key.
When you press the POWER
switch, "14 MHz USB" is displayed
.. or the receive sensitivity is low.
The backup battery voltage is low.
Please refer to Section 4-11-1.
No signal is received even when
the antenna is connected, or the
receiver sensitivity is low.
1. SQL control fully clockwise.
2. The ATT switch is ON.
3. The REC/SEND switch is in the
SEND position.
Microphone PTT switch is in the
transmit position.
5. SLOPE TUNE
improperly adjusted.
-
control is
1. Turn the SQL
counterclockwise.
2. Set the ATT switch to OdB.
3. Set the REC / SEND switch to
REC.
4. Set the PTT switch to the
receive position.
5. HIGH control: Fully clockwise
LOW control: Fully
counterclockwise}
control
An antenna is connected, but no
signal is received and the S-meter
deflects fully.
RF gain control is too low.
Turn the RF gain control MAX
clockwise.
The S-meter deflects and stays at
a certain position even with no
signal.
1. Low DC or AC line voltage.
2. RF gain control closed.
1. Use a step-up transformer to
raise the line voltage. Use a 12
to 16 V battery.
2. Turn the RF gain control fully
clockwise.
Signal is received, but no sound is
heard.
MODE key position is incorrect.
Change the MODE key to the
correct mode.
SSB received signal is extremely
SLOPE TUNE control is improperly
HIGH control: Fully clockwise
pressing the UP/DOWN switches,
turning the TUNING knob, or
M.CH/VFO CH control.
Memory scan fails. ("CHECK")
Nothing is stored in memory.
Store the frequency.
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