WT405 warm trim screw missing
I bought a used wt405 this week and it gave me problems last night. It was popping and crackling and humming a lot. So I read up and was taking the board out to check the solder joints when I noticed thee is no screw in the warm trim pot. There is only a white tab with a hole soldered to the board. What is missing here?
I also checked the solder joints on the 5k resistors and they look good. Don't know what is causing the popping??
Okay, the only thing I have found to be suspect is a bad joint that looks like it burnt and the solder melted off. It is on a tall black cylindrical part in location C61. It is in the middle of the board at the edge near the back of the amp. It is labeled HG 40c + 105c VENT 1000uf 25V.
Last edited by jchrisk1 : 11-23-2013 at 03:32 PM.