Maintenance And Adjustment; General Information - Kenwood TM-221A Instruction Manual

5. MAINTENANCE AND ADJUSTMENT
5-1. GENERAL INFORMATION
Your transceiver has been factory aligned and tested
to specification before shipment. Under normal cir-
cumstances the transceiver will operate in accord-
ance with these operating instructions. All ad-
justable trimmers and coils in your transceiver were
preset at the factory and should only be readjusted
by a qualified technician with proper test equipment.
Attempting service or alignment without factory
authorization can void the transceiver's warranty.
When operated properly, the transceiver will provide
many years of service without requiring realignment.
The information in this section gives some general
service procedures 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
it in its original box and packing, and include a full
description of the problems involved. Also include
your telephone number. You need not return ac-
cessory items unless directly related to the service
problem.
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.
5-4. IN CASE OF DIFFICULTY
5-4-1. Receive
Please list:
Model and Serial Number
The problem you are having.
Please give sufficient detail to diagnose. Information
such as other equipment in the station, meter
readings and anything else you feel might be useful
in attempting diagnosis.
Caution:
Do not pack the equipment in crushed newspapers
for shipment. Extensive damage may result during
shipment.
Notes:
1. When claiming warranty service, please include
a photocopy of the bill of sale, or other proof of
purchase showing the date of sale must accom-
pany the radio.
2. Record the Date of Purchase, Serial Number and
Dealer from whom purchased.
3. For your own information, retain a written record
of any maintenance performed on the unit.
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 (no harsh chemicals) and a damp cloth
to clean the cabinet and front panel.
SYMPTOM
PROBABLE CAUSE ACTION
Indicator does not light and data is
not displayed when POWER switch
is pressed. 2. Fuse is blown.
1. Wrong power polarity.
1. Connect red to '+' and black to
2. Replace with the specified fuse after
repairing the cause.
For the fuse rating, see Sections 5-6.
Display is dark.
Power voltage is low.
Check voltage for 13.8 VDC +1 5%
No sound from the speaker. No
signal can be received.
1. VOL control is turned too far
counterclockwise.
2. Squelch is closed.
3. PTT switch of microphone is pressed
setting the unit in the transmit mode.
4. CTCSS is operating.
1. Turn the VOL control.
2. Turn the SQL control counterclock-
wise.
3. Turn PTT switch off.
4. Press the CTCSS key.
Scan fails.
Improper scan control setting, such as
SQL control adjustment.
See Section 4-5.
Memory can not be backed up. Backup battery voltage is low.
See Section 5-5.
5-4-2. Transmit
SYMPTOM
PROBABLE CAUSE ACTION
No output. =
. Microphone jack is not plugged in.
2. Poor antenna connection.
1. Plug jack in.
2. Connect antenna securely.
Can not access to repeater.
1. Setting of the TONE, SHIFT, REV
keys are wrong.
2. Wrong Tone Frequency is selected.
1. Refer to Section 4-6.
2. Refer to Section 4-7.