Sorry, But I don't have a user manual. Just the schematic & parts list .

Ok , here is the Amp I repaired , and my to Rock & Roll Butcher Knives , lol.  Also I am going to go ahead and replace the 2 - WW 5W 330 k ohm resistors also since they are showing signs of overheating.

Its kinda wierd, the amp is working great now, everything is working as it should. My series light starts out as hardly noticeable glow then slowly gets a little brighter, the longer the amp has been on. Then stays at a certain point of brightness. Which looks about like 15 or 20 watts in brightness.  Which isn't that bright for a 75 watt bulb. So all the parts must have settled in.

Also the light gets brighter the longer it is on. But it is still working, and reverb is working just not real well.

Well I replace the 2 Transistors - 142 & 147 , and the 2 WW resistors - R84 & R85 . I plugged it back into the test light  before turning it on .  It worked without the light coming on at first , then all of a sudden the light came on when I turned up the volume. Not bright , dimly lit and gets brighter when the volume gets louder , especially on the bass notes.
Reverb doesn't work but everything else seems too. Sounds really good on clean . I played it for about 20 minutes or longer. Thx again for your help Guys.

I finally received the parts on the 2nd (yesterday) . And while removing the old transistors, I noticed there wasn't any insulating material between them and the heat sink. So will that cause more problems to the rest of the components or not ?

OK, thx . I ordered the parts, and should get them by Wed. 18th. I will let you know when I get them installed.

Here is the Schematic .

Hi, I am new here. Also, I just purchased this amp knowing it had this problem. I checked the power transformer between the 2 black wires is reading 177 Volts. But I don't think my volt meter is exactly accurate. I hooked up a light bulb load tester, I built, to see if I could isolate the problem area. But it just gets so bright immediately I shut the power down . So do you guys have any idea what could be the problem with this fender amp ? Or any thing that I could check ? I would appreciate any help .