Hi folks. I picked up a 2230 locally that I was told was blown up. It had an un-blown 8-amp fuse in the AC fuseholder, which was bad news. Outputs seem to test ok, amusingly enough.
I put in a normal 3A fuse and fired it up on a dim-bulb. Receiver was totally dead--no lights, no initial voltage surge at the bulb, no nothing.
Power switch is fine. I had AC at the switched outlet but nothing at the rectifier, and the transformer primary measured open line.
So, I cracked open the transformer, fished out the thermal fuse (blown), and replaced it. Now I get lights but there's still no voltage surge to light the bulb on power-up.
Primary measures about 3 ohms. I have 50.5 VAC into the rectifier (via the orange wires). I do not have any voltage across the big 4700 uf cap. Rectifier has something like 25 VDC on each side for output.
Does this mean the transformer has a bad secondary? If so, what's the likely cause, given that the outputs appear to test fine and the rectifier seems to work? Just something spilled in there or something?
I put in a normal 3A fuse and fired it up on a dim-bulb. Receiver was totally dead--no lights, no initial voltage surge at the bulb, no nothing.
Power switch is fine. I had AC at the switched outlet but nothing at the rectifier, and the transformer primary measured open line.
So, I cracked open the transformer, fished out the thermal fuse (blown), and replaced it. Now I get lights but there's still no voltage surge to light the bulb on power-up.
Primary measures about 3 ohms. I have 50.5 VAC into the rectifier (via the orange wires). I do not have any voltage across the big 4700 uf cap. Rectifier has something like 25 VDC on each side for output.
Does this mean the transformer has a bad secondary? If so, what's the likely cause, given that the outputs appear to test fine and the rectifier seems to work? Just something spilled in there or something?