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                        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

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BULLETIN # 829
MODEL: TR-7800
SUBJECT: Loss of Memory 


Intermittent loss of memory may be corrected by adding one resistor at the
microprocessor on the control unit.

Procedure:

1.   Remove bottom cover, 4 screws.

2.   From the Control unit X53-1180-xx unplug the rear mounted connectors 8-11.

3.   Remove 6 screws from the board.

4.   Swing the unit forward.

5.   Install a 470K ohm 1/8 watt or larger resistor from connector 11, "UP"
pin, to ground.  (microprocessor pin 35, PA2 port).  Space is limited:  Be
certain not to create a solder bridge when installing the resistor.

6.   Reverse steps 4-1 for reassembly.