Hi, I viewed this helpful youtube video:
, and wanted to do some of this at home before taking the Sansui 909DB to a tech, assuming I find one willing and seemingly able.
It powers to green light; dials in AM/FM stations; selector lights turn on; no sound when I hook up speakers.
I have an old amp and pre-amp (McIntosh) for testing the Sansui amp stage through main in, and the pre-amp stage through pre out (after removing jumpers, of course).
If I hook up a turntable (phono in) and tape deck (tape record) to the Sansui, should I be able to monitor output through tape deck’s headphone jack if the tuner and phono pre-amp work, and the problem instead is with preamp or amp stage? If not, is there a consumer electronic alternative? I thought the signal to be recorded onto tape normally goes through the receiver’s preamp.
I assume playing a tape through (aux in) is a suitable input for the preamp test? For an alternative input I have an old Panasonic boom box w/L&R RCA aux out, but it will take a month before I can get my hands on it.
If this testing suggests the problem is the preamp stage, then how likely is it that the repair would involve the Dolby board? I thought components and solder looked fine on the side I could see when I took the amp cover off to spray the few pots that were accessible. Among the few techs I have asked, or seen opining online, some say Dolby board almost always becomes a problem, some say it rarely is the problem.
It powers to green light; dials in AM/FM stations; selector lights turn on; no sound when I hook up speakers.
I have an old amp and pre-amp (McIntosh) for testing the Sansui amp stage through main in, and the pre-amp stage through pre out (after removing jumpers, of course).
If I hook up a turntable (phono in) and tape deck (tape record) to the Sansui, should I be able to monitor output through tape deck’s headphone jack if the tuner and phono pre-amp work, and the problem instead is with preamp or amp stage? If not, is there a consumer electronic alternative? I thought the signal to be recorded onto tape normally goes through the receiver’s preamp.
I assume playing a tape through (aux in) is a suitable input for the preamp test? For an alternative input I have an old Panasonic boom box w/L&R RCA aux out, but it will take a month before I can get my hands on it.
If this testing suggests the problem is the preamp stage, then how likely is it that the repair would involve the Dolby board? I thought components and solder looked fine on the side I could see when I took the amp cover off to spray the few pots that were accessible. Among the few techs I have asked, or seen opining online, some say Dolby board almost always becomes a problem, some say it rarely is the problem.
