Hello All,
I have a VSX-1021-K Pioneer Amplifier that has me stumped. Has MCACC light flashing meaning it is in DC protect mode and will not get out with release mode.
Attached are all the readings I pulled up to narrow down the issue to FR speaker and SBR speaker. I compared resistance values between components in the overload detection circuit of SBR and SBL looking for a short or different values with no luck. note I did not remove any components as nothing stood out of the ordinary.
I have also checked all transistors along the bottom of the amp including Q404 and Q410 equivalents for shorts or opens with no issues.
Not sure what direction to go now, should I remove Q404 and/or Q410 equivalent and test that way to try and confirm issue is 'up stream' from there?
service manual can be found here:
I have a VSX-1021-K Pioneer Amplifier that has me stumped. Has MCACC light flashing meaning it is in DC protect mode and will not get out with release mode.
Attached are all the readings I pulled up to narrow down the issue to FR speaker and SBR speaker. I compared resistance values between components in the overload detection circuit of SBR and SBL looking for a short or different values with no luck. note I did not remove any components as nothing stood out of the ordinary.
I have also checked all transistors along the bottom of the amp including Q404 and Q410 equivalents for shorts or opens with no issues.
Not sure what direction to go now, should I remove Q404 and/or Q410 equivalent and test that way to try and confirm issue is 'up stream' from there?
service manual can be found here:
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