Audio Research VSi60

[petrnyc]

Hello,
One of my 6550 output tubes in my Audio Research VSi60 Started red plating, luckily I was able to turn amp off as soon as I saw.

My question is: anyone has a schematic ?

And the plate resistor of the bad tube #5 now reads only 8R5 (looks badly burned and stinks) instead of 100R on tube #4.

The bias measuring resistor is burned, reads open on #5, but the other tubes bias resistors #4 read between 1R3-1R5 I think it should be a 1 R in there?
The first picture is the burned up 1R resistor on tube #5
The second picture reads 8R5 on tube #5 instead of 100R on other tubes.

thank you.

 

[petertub]

You could start by looking at Audio research site

 

[platon.rado]

Only manuals, not service manuals.

 

[petrnyc]

You could start by looking at Audio research site

petertub, yeah thank you did that, they only have owner manual, that has basic operating instructions etc.

 

[chrisng]

Stereophile review notes that the VSi60's circuitry is essentially identical to that of ARC's VS60 power amp, but with a higher input sensitivity to enable it to be driven directly from line-level sources.
https://arcdb.ws/Database/VS60/RC_VS60_schematic_and_parts_list.pdf

 

[petrnyc]

Hi all solved got the documents, thanks for your help.

 

[petrnyc]

Stereophile review notes that the VSi60's circuitry is essentially identical to that of ARC's VS60 power amp, but with a higher input sensitivity to enable it to be driven directly from line-level sources.
https://arcdb.ws/Database/VS60/RC_VS60_schematic_and_parts_list.pdf

Thank you! Perfect! Aside the 1R resistor that is gone and the 100R that reads only 8R does anyone foresee any other casualties with the “bad” tube circuit other than components I should look for?
Thanks