Kenwood TS-850S - Manual (Page 73)

6-4. IN CASE OF DIFFICULTY
The problems described in this table are failures caused in general by improper operation or connection of the
transceiver, not by defective components. Check according to the following table. If the problem persists,
contact an authorized agent or service station.
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.
4. Microphone PTT switch is in the
transmit position.
5. SLOPE TUNE control is
improperly adjusted.
1. Turn the SQL control
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
LQW control ; Fully
counterclockwise
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
high cut or low cut.
SLOPE TUNE control is improperly
adjusted. HIGH control: Fully clockwise
LOW control : Fully
counterclockwise
Frequency is not changed by
pressing the UP/DOWN switches,
turning the TUNING knob, or
M.CH/VFO CH control.
F.LOCK key is ON. Set F.LOCK key to OFF.
Memory scan fails. (“CHECK”) Nothing is stored in memory. Store the frequency.
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