If for any reason work is performed in the Final unit, install two additional parts to the Filter unit X51-1200-00.

This will improve protection action.

Procedure:

1. Remove top and bottom covers.
2. Remove Final unit (6 screws).
3. Filter unit X51-1200-00 will be exposed. Install between Q3 Base, and TP-1, series wired diode and resistor D14 and R34.
   

No adjustments are necessary.

New Part number

D14 1S1555 V11-0076-05

R34 4.7K ohm

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©1979 Kenwood