danrclem
Super Member
I bought a 1980 today along with a SG-9800 equalizer, CT-F9191 tape deck and a pair of CS-922A speakers.
I listened to it at the sellers house and it sounded good. I checked the DC offset and the left channel was about 23 mV. The right channel was about 178 mV. I know that's not good on the right channel but I decided to hook them up to my speakers anyway.
The right channel wasn't working. I knew the controls needed cleaned so I started working them and when I got to the tone toggle some working got the right channel working. My Klipsch Chorus brought it to life and it sounded very good. I played it for less than ten minutes, unhooked my speakers and started checking the DC offset again thinking that maybe the tone control had something to do with the high reading. Well it still read about the same. Some black smoke then came up out of the vent (in the center and maybe a little more to the left facing it from the front) that I wouldn't call a puff but more than a wisp. I don't know if I moved my probe off of the speaker connecter any but I saw an open reading before I was able to shut it down.
I took the wood case and vent off and wasn't able to see any evidence of anything burnt. It had dust on the inside but was cleaner than most all receivers that I have looked at before cleaning. The 1980 looks good and the CT-F9191, SG-9800 look even better. The CS-922A speakers have some rough spots on them.
Even though I think I could more than get my money back out of it since I bought it at a good price my stomach still hurts. I don't really have time to work on it but if anybody has any ideas of what it may be please let me know. When I am able to get back to it I'll use this posting for inquiries.
edit; change mA to mV
I listened to it at the sellers house and it sounded good. I checked the DC offset and the left channel was about 23 mV. The right channel was about 178 mV. I know that's not good on the right channel but I decided to hook them up to my speakers anyway.
The right channel wasn't working. I knew the controls needed cleaned so I started working them and when I got to the tone toggle some working got the right channel working. My Klipsch Chorus brought it to life and it sounded very good. I played it for less than ten minutes, unhooked my speakers and started checking the DC offset again thinking that maybe the tone control had something to do with the high reading. Well it still read about the same. Some black smoke then came up out of the vent (in the center and maybe a little more to the left facing it from the front) that I wouldn't call a puff but more than a wisp. I don't know if I moved my probe off of the speaker connecter any but I saw an open reading before I was able to shut it down.
I took the wood case and vent off and wasn't able to see any evidence of anything burnt. It had dust on the inside but was cleaner than most all receivers that I have looked at before cleaning. The 1980 looks good and the CT-F9191, SG-9800 look even better. The CS-922A speakers have some rough spots on them.
Even though I think I could more than get my money back out of it since I bought it at a good price my stomach still hurts. I don't really have time to work on it but if anybody has any ideas of what it may be please let me know. When I am able to get back to it I'll use this posting for inquiries.
edit; change mA to mV
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