G07 - Can't adjust B+

Peale

Active member
Joined
Sep 1, 2003
Messages
3,469
Reaction score
15
Location
Brattleboro, Vermont
After a rebuild I went to check the B+ and it's ~147VDC. Adjustment pot does nothing. What are things I should check? This is operating otherwise.
 
Try a new X902 transistor, R908 resistor or a new B+ pot. Depending on how your chassis failed in the first place, it can be any one of or all three parts
 
Last edited:
Look it over for cold solder, and do continuity traces on all the traces coming from the the flyback pins, as they can crack pretty easily.

And doublecheck you wired up the VR properly..
 
Thanks Talon. R908 is indeed open. I'm sure the others are bad too, though they're reading okay. I'll just replace them.
 
Back
Top Bottom