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World of Ham Radio 1997
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WOHR97_AmSoft_(1997-02-01).iso
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1997-02-01
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==============================================================================
K E N W O O D
>>> A M A T E U R R A D I O S E R V I C E B U L L E T I N <<<
==============================================================================
Kenwood Service Centers
Kenwood Service Corporation Kenwood Service Center, East
2201 East Dominguez Street 829 Lynnhaven Parkway, Suite 130
Long Beach, California 90801 Virginia Beach, Virginia 23452
Telephone 1-310-639-5300 Telephone 1-804-340-1702
==============================================================================
BULLETIN # 1013
MODEL: TH-78A
SUBJECT: Left Encoder Inoperative
Symptom:
The left encoder on the top panel does not work. This symptom usually occurs
when the unit is reassembled after service.
Cause:
If the front panel is removed without removing the top panel the Control unit
might come in contact with the encoder mounting hardware. This causes chip
resistor R97 to be sheared from the board.
Corrective Action:
Delete chip resistor R97 from the control unit and add a short jumper wire in
its place. Resistor R97 was used to prevent feedback during transmit. It has
been confirmed by our engineering staff that the performance of the circuit
will not be adversely affected by this change.
Time required for this modification is 30 minutes or less.
Service code A:13 B:X53-342X-XX C:R97 D:91