i fixed an Orion HCCA 250 last night with a digital reference heat sync and a 1'st generation board?? at least according to the amp guts pictures. neither of the channels were inverted so i know it needs a bridging module to run mono but i'm wondering if this was released this way or if it was a pieced together unit?
it all appears original but it's hard to say. it has the 4 large sideways 3300uf 50v caps in the center and the 2 smaller sideways 3300uf 16v caps near the power entry.
i changed the 4 large caps to 4700uf and replaced a leaking smaller electrolytic cap and parts that were corroded around it and a blown out resistor from the +/- regulated voltage curcuit.
it seems to play fine now. what should the rail voltage be and where is the best place to measure it from?
for such an old amp the soldering on the bottom of the board looks fresh and new! i've seen much newer ams with horrible soldering that was dried up and corroded. these amps were very nicely built!!!
it all appears original but it's hard to say. it has the 4 large sideways 3300uf 50v caps in the center and the 2 smaller sideways 3300uf 16v caps near the power entry.
i changed the 4 large caps to 4700uf and replaced a leaking smaller electrolytic cap and parts that were corroded around it and a blown out resistor from the +/- regulated voltage curcuit.
it seems to play fine now. what should the rail voltage be and where is the best place to measure it from?
for such an old amp the soldering on the bottom of the board looks fresh and new! i've seen much newer ams with horrible soldering that was dried up and corroded. these amps were very nicely built!!!