Kenwood TS-440S - Manual (Page 23)

5. MAINTENANCE AND ADJUSTMENT
5-1. GENERAL INFORMATION
Your transceiver has been factory aligned and tested
to specification before shipment. Under normal circum­
stances the transceiver will operate in accordance with
these operating instructions. All adjustable trimmers
and coils in your transceiver were preset at the facto­
ry and should only be readjusted by a qualified techni­
cian with proper test equipment.
Attempting service or alignment without factory
authorization can void the transceiver's warranty.
When operated properly, the transceiver can give years
of service without requiring realignment. The informa­
tion in this section gives some general service proce­
dures which can be accomplished without
sophisticated test equipment.
5-2. SERVICE
Should it ever become necessary to return the equip­
ment to your dealer or service center for repair, pack
in its original box and packing, and include a full
description of the problems involved. Also include your
telephone number. You need not return accessory
items unless directly related to the service problem.
You may return your radio for service to the Autho­
rized TRIO-KENWOOD Dealer from whom you pur­
chased it. A copy of the service report will be returned
with the unit. Please do not send sub-assemblies or
printed circuit boards. Send the complete unit, in its
original boxes and packing.
Tag all returned items with your name and call for iden­
tification. Please mention the model and serial num­
ber of your radio in any correspondence, whether
phone or written. For future reference, record this in­
formation in the space provided on the back cover of
this manual.
Service note:---------------------------------------------------------------
Dear OM, if you desire to correspond on a technical
or operational problem, please make your note short,
complete, and to the point. And PLEASE make it
readable.
Please list: Model and serial number.
The question or problem you are having.
Please give sufficient detail to diagnose: other equip­
ment in the station, meter readings and anything you
feel might be useful in attempting diagnosis.
Caution: --------------------------------------------------------------------
Do not pack the equipment in crushed newspapers for
shipment! Extensive damage may result, during
shipping.
Notes: -----------------------------------------------------------------------
1. Record the date of purchase, serial number and
dealer from whom purchased.
2. For your own information, retain a written record
of any maintenance performed on the unit.
3. When claiming warranty service, please include a
photocopy of the bill of sale, or other proof of pur­
chase showing the date of sale.
5-3. CLEANING
The knobs, front panel and cabinet of the transceiver
are likely to become soiled after extended use. The
knobs should be removed from the transceiver and
cleaned with a neutral soap and warm water. Use a
neutral soap (not harsh chemicals) and damp cloth to
clean the cabinet and front panel.
5-4. IN CASE OF DIFFICULTY
The problems described in this table are failures caused
in general by improper operation or connection of the
RECEPTION
transceiver, not by defective components. Examine
and check according to the following table. If the
problem persists, contact an authorized agent or serv­
ice station.
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.
Nothing is displayed or wrong digits
are displayed when the POWER
switch is turned on.
The microprocessor malfunctions. This
occurs when the battery is old or the sup­
ply voltage drops extremely on the occa­
sion of consuming large current.
1. Adjust the supply voltage to nominal
voltage ±10V with use of a boost­
ing transformer.
Use a 12 to 16V battery.
2. Turn the POWER switch on again.
No signal is received even when the
antenna is connected.
1. SQL control fully clockwise.
2. Microphone PTT switch is in the trans­
mit position, and the TS440S is in the
transmit mode.
3. SELECTIVITY switch is set to "N" or
"Ml'' and no optional filter is installed.
1. Turn the SQL control counter­
clockwise.
2. Set the PTT switch to the receive
positon.
3. Ensure the SELECTIVITY switch is set
to either "AUTO", "M2", or "W"
An antenna is connected, but no sig­
nal is received and the S-meter fully
deflects.
RF control is too low, decreasing the high
frequency circuit gain.
Turn the RF gain control fully clockwise.
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