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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 # 32
MODEL: TR-7400A
SUBJECT: CHANGES IN THE PD UNIT
                                                               
There was a temporary production change in the PD Unit of the TR-7400A. This
change effected the 73XXXX and 74XXXX series units only. The change was made
because of the Motorola MC-4016P IC was not available. The Texas Instruments'
SN74LS192 IC was used as a replacement. It is not a direct replacement, though.

It was also necessary to change IC-8 from a TD-3400AP to a TD3404. This series
of PD Units is easily recognized because of the three SN74LS192 IC's are 
mounted in sockets instead of being soldered in place. The PC board was 
changed to J25-2512-03T instead of J25-2512-03 for this change. The schematic 
is shown in the graphic.