Hi all, I'm not extremely new as I have used this forum for information for awhile now, but never posted. Anyways I got into audio when my dad gave me his old Technics setup which included a SU-8044, complete with a blown right channel. I have since repaired it and works and sounds decent.
Last week my fiance's grandfather wanted to know if i was interested in a old receiver. Of course I said yeah. He comes out with a Project One Mark 1500! He tells me that he thinks it has a short because one channel doesn't work very well. I got it home and powered it up and could tell that it definitely had some dirty switches and pots. I had some CRC QD sitting around and cleaned them up, (I know Deoxit is preferred and I will be ordering some). Upon letting it dry I powered it back up and it sounded great. Next step I checked the DC-offset of each channel and it wasn't to bad, but not great either (40mv-52mv). After looking at the board and determining that I knew which pots were the adjust for the offset I managed to get them very close to 0v.
My next question is what should be my next step? From the research I have done, there is no service manual out there so I'm just going by what I know and what other people do to these old receivers.
Last week my fiance's grandfather wanted to know if i was interested in a old receiver. Of course I said yeah. He comes out with a Project One Mark 1500! He tells me that he thinks it has a short because one channel doesn't work very well. I got it home and powered it up and could tell that it definitely had some dirty switches and pots. I had some CRC QD sitting around and cleaned them up, (I know Deoxit is preferred and I will be ordering some). Upon letting it dry I powered it back up and it sounded great. Next step I checked the DC-offset of each channel and it wasn't to bad, but not great either (40mv-52mv). After looking at the board and determining that I knew which pots were the adjust for the offset I managed to get them very close to 0v.
My next question is what should be my next step? From the research I have done, there is no service manual out there so I'm just going by what I know and what other people do to these old receivers.