Question about RCA Audio Players & Recorders

Hello i have a yamaha cx-830 pre amp. the volume potentiometer was cracking a year ago and an authorized service tech told me to blow the dust out and lube it with detoxit. Witch corrected the problem. The unit hardly ever is used but now there seems to be no sound . The unit powere up and every switching feature appears to function correctly. I have turned the output levle all the way down on my cd player and bypassed the pre amp directly to the mx-830 via rca momentarily and the other components all function correctly. If the volume is turned up to absolute maximum there can be heard a slight amount of sound making its way through the pre out rcas to the power amp. Does any one know if the small volume potentiometer boards can fail or any where else it sounds like i should be looking? Thank you

1 Answer

Brad Brown

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RCA Master
18,562 Answers

This is a component failure. A lot of pre amps use OPERATION AMP chips. Finding the issue involves a lot of time and troubleshooting with special equipment.

Posted on Apr 07, 2020

3 Related Answers

Anonymous

2 Answers

SOURCE: my old yamaha wont stop buzzing

HI SIR .THAT IS NOT BIG PROBLEM.ALL YOU HAVE TO DO MAKE SURE THAT YOUR PRE HAVE THE FLL.1 PROPERLLY EARTHED(THE GROUND FROM YOUR AMP ALSO GOES TO THE PRE )2 ASK YOUR ELECTRONIC MECHENIC TO CHECK IF THER'S NO BROKEN GROUND ON THE BOARD INSIDE.

Posted on Aug 23, 2008

David Dunn

8546 Answers

SOURCE: power amp outputs no sound

No one could determine the extent of the problem without placing hands and eyes on the unit.

Have you checked the Yellow Pages or online equivalent?

Posted on Mar 25, 2010

SANYADE OMOTOLA

1622 Answers

SOURCE: in need of a pre-amp

Hi, You will need to use another RCA monster cable to test where the buzz sound , if the buzz sound still comes on, that means the out put of the pre-amp needs to be replaced...

Take care..

Posted on Apr 17, 2011

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Yamaha 860 st

this could be the pre amp transistor or the power amp , it will need to be tested and other components tested also to make sure they are not causing the pre amp to fail or the power amp to fail
if its the pre amp it will be cheap , if its the power amp then it won't be cheap , other small components are cheap

electech

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