Yamaha cr 620, Balance function not working
This receiver may have a simple or complex problem but I am a newbie and require some advise.
The cr 620 right side is very weak, when I turn the balance knob I get varying results of higher or lower volume on right side. The right side has a constant low hum and has much static and distoration when I rotate or jiggle the knob. I get very little sound from the rigth side (alomost none) and it is always more distorted than clear sounding.
The left side seems to work just fine howeve hard to tell if I ma gettin balancce variablilityo left side since it seems as soon as I rotate balance knob left of 12 noon full volume on left side is acheived, volume or sound does not increase as i roate balance knob further to the left.
I have sprayed electronic cotnact cleaner in the rheostat, but no changes (better or worse) were apparent.
I would like to start by replacing the balance rheostat (is it a rheostat and am I using the correct terminology?). I reviewed the specs but could not interpret well enough to identify the balance rheostat part number
Can someone advise me of the part number and where I can order this item?
Also, If I am going down the wrong path and this is clearly not a rehostat problem, can someone advise how I can best begin troubleshooting and\or replacing board components?
Any help is greatly appreciated.