SX-1980 tuner

[KR7600]

The SX 1980 I just received from ebay has a tuner problem, I was aware of it prior to purchase. On the left side of the scale it is very hard to tune a station. However, once it is tuned in, no problem. On the right side of the scale I do not have this problem. Does it need a tuner alignment or does it need one of those IC tuner chips. I just purchased 2 chips from ebay.

 

[Nakdoc]

Alignment of the detector is what you need.

 

[KR7600]

Thanks for the info.

 

[sixt8mopar]

Perhaps you could investigate this first...Worth a look and see......

Tuner

 

[skibjr]

Clean the bearings on the variable tuning cap. Every SX-1980 I've come across has had the problem you describe.

 

[EchoWars]

The cover for the tuning gang is soldered on at two 'tabs'. Must be desoldered first...

 

[crooner]

I guess it's soldered because Pioneer recommends swapping front ends instead of repairing the units. This information I got from the Service Manual. Since NOS front ends are unobtainum, it's well worth desoldering the case and servicing the unit.

 

[Punker X]

All the 1980's I've seen have done this. In addition to the detector, the quartz lock adjustments are off. Dirty front ends, usally make a scratchy noise when tuning, and can make it hard to center tune. If its consistant across the band, the front end is probably not really causing the issue.

X

 

[KR7600]

It is exactly as Punker X describes. It is very difficult to center the signal and it is scratchy when changing stations but only on the left side of the scale. The right side gives no problems.