CA-2010 Intermittent Left Channel ?

[bassmaven]

Listening to a recently acquired CA-2010 early today, noticed the left channel was weak. After a few turns of the balance and volume knobs the left channel "came back" and sounded great.

Turned the unit on again later in the day, and no left channel (very little sound, but distorted, and only at high volume). The balance/volume knob wiggle trick didn't work this time.

The inner (working) part of the CA-2010 volume and balance knob looks much more "sealed" than the one on my 1010. Is there some way to get cleaner (Deoxit?) in there? Does what appears to be a grey hexagonal plastic casing come off, or have access holes somewhere I can't see?

Or is my intermittent left channel as likely a matter of a fuse somewhere? I've seen a bunch of fuses under the 2010's bottom cover......

Any suggestions greatly appreciated......

:scratch2:

 

[pht714]

The usual treatment and kind of a must for vintage stereo this age ... DeOxit and Fadelube it fix most of this kind of problem.... Learned from this forum.

 

[ManyMoonsAudio]

Symptom changes every time you turn it on? Speaker relay is number one suspect. There is also a relay that toggles class A/AB on the amplifier. These relays should be replaced and all the controls cleaned.

If it is a control, i'd suspect the switches before blaming the volume/balance.

These are super nice integrateds, but IME they need alot of work at their age.

 

[pradigmshift]

Check the coupler switch at the back. Next time I open my CA-1010 the coupler switch will not only get deoxit (that worked for some time) but a cotton swab treatment to remove the carbon off the tracks as well.

 

[avionic]

Check the coupler switch at the back. Next time I open my CA-1010 the coupler switch will not only get deoxit (that worked for some time) but a cotton swab treatment to remove the carbon off the tracks as well.

the coupler switch at the back

:thmbsp: