Yamaha CR-1020 idling current not adjusting

[Hifibythekg]

Thanks!
And leave the DMM on the same settings for this reading? That is 200mV?

 

[avionic]

Thanks!
And leave the DMM on the same settings for this reading? That is 200mV?

It will need to be moved to a higher range 200V

 

[Hifibythekg]

thanks

 

[Hifibythekg]

Ok to put the grabbers in place, and then turn on the power?

 

[avionic]

Question.. Were you trying to adjust your idle current with power on or off ?

 

[avionic]

Ok to put the grabbers in place, and then turn on the power?

Yes

 

[Hifibythekg]

I had the power on when trying to adjust the idle current.

 

[avionic]

I had the power on when trying to adjust the idle current.

 

[Hifibythekg]

First reading:
49.1

 

[Hifibythekg]

Fuse nearest faceplate on left board

 

[Hifibythekg]

Which contact point would you like next?

 

[avionic]

Measure the voltage at the two fuses on the amplifier assemblies.

 

[Hifibythekg]

Same fuse location on right board is also 49.0

 

[avionic]

Same fuse location on right board is also 49.0

Is the other fuse a - 49vdc ?

 

[Hifibythekg]

Yes, nearly:
-48.7

 

[avionic]

Close enough..

 

[Hifibythekg]

That was the left one.
And the right one is -48.8

 

[avionic]

Clean your TP1 and O test points with alcohol and lets retry the adjustment...No power while cleaning.. Power while testing..

 

[avionic]

I see you installed new trimmer adjustments. What is the part number of the new trimmers ?

 

[Hifibythekg]

5kΩ, Through Hole Trimmer Potentiometer 0.5W Side Adjust Bourns, 3296

• RS Stock No. 521-9580
• Mfr. Part No. 3296P-1-502LF
• Brand Bourns