Sansui AU-7700 Power Supply Voltage Problem
I have an AU-7700 on the bench that is producing different voltages off the bridge diode configuration that powers the output rails. See pic. The bridge is getting 32 volts in but producing -45 volts on the one side (within spec) and 34 on the other (not within spec).
These diodes are the large metal types on many power supplies. The schematic shows them as SS-5 and SS-5R. Has anyone ever seen these go bad? I have read in other threads that if these were bad the unit would not work at all and I tested the preamp out into a different power amp and the preamp works fine.
See pic and any advice is appreciated!
Thanks,
Zeke
I have an AU-7700 on the bench that is producing different voltages off the bridge diode configuration that powers the output rails. See pic. The bridge is getting 32 volts in but producing -45 volts on the one side (within spec) and 34 on the other (not within spec).
These diodes are the large metal types on many power supplies. The schematic shows them as SS-5 and SS-5R. Has anyone ever seen these go bad? I have read in other threads that if these were bad the unit would not work at all and I tested the preamp out into a different power amp and the preamp works fine.
See pic and any advice is appreciated!
Thanks,
Zeke
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