583: Flash secondary PS:
2SK513, ZD15V, F2.5A => F3.15A, 4R3 -2.
FAN repair.
Cleaning.
Full test.
837: Cooler, SENS cables.
1538: Test. Ok
3446: Total corrosion. Replaced: ZD15V -3, BYV26, capacitors.
Regulated to 26V.