Crown PSA-2 - Page 112

SAZPSAZ0B81 981
SUBJECT; PSA-2 Output Device Change Mod
SERIAL NUMBERS AFFECTED: PSA-2 Amps in for service with €4718-0 or 05617-2 output devices
Bue to reliability problems in the PSA-2 amplifier, caused by output transistor
failure, output device part numbers C 4718-0 and 0 5617-2 have been discontinued
and are being replaced by part number C 5869-0.
When servicing a PSA-2 amplifier, al] C 4718-D or 0 5617-2 output devices should
be removed (even if failure is not output device related) and the new C 5869-0
autput device installed. The only circuit modification required is the deletion
of the two (2) capacitors, C 401 (.1 mfd} from the negative output modules in
both channels.
This change is for the PSA-2 amplifier only. We are not experiencing this mode
of failure in the SA-2 amplifier.
if you have any further questions, please feel free to call or write.
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