ARDUJENSKI@aol.com wrote:
> SYMPTOM: The voltage dropped under load. For example the radio in rcv the
> voltage was about 13v. Plug in the 229 tuner to run the three 1892 bulbs and
> the voltage dropped to 6v. Now the PS keeps blowing the internal fuse
> (32v-20amp). There is no evidence of damaged parts.
>
Normally I would suspect open series pass transistor, however, this is
not consistent with the blowing of internal fuse. I think you may have
to do some troubleshooting starting with the biasing of the pass
transistors, if the out put of the rectifier is also low, check bridge
rectifier and/or resistance at output for possible low resistance to -12
bus (this may be ground).
Good luck with it.
73 WD4AIR
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