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Does this look bad? Electrical issues...

M

milbrewers21

Jun 24, 2008
9
0
#1
#2
What kind of amp? The resistor looks like it's been replaced once already. It may actually be functional, but heading towards its end of life, and causing circuit board damage along the way.

If the resistor is getting too hot, there's a chance something else is wrong in the amp, and a tech can check if there are any bias adjustments that need to be made, or other potential problems.

Get the fan fixed. That's vital.
 
#5
It looks bad. I have seen them occasionally hold their value looking like that, but obviously if you put any current through that thing it is going to change value.
Just as obviously (or more so) it has been replaced before. That often indicates a problem area. There is likely something else wrong in that circuit causing it to burn like that. Possibly a shorted cap or bad diode....
Hopefully you can find someone to fix it with better soldering skills. Fixing the fan is a good idea too, but probably not causing that burned resistor.
 
#7
The good news is the correct value is a 270 Ohm resistor at 2 Watts. The bad news is something caused this to happen. Your tech is definately a beginner with the BUNZ-O-MATIC torch used as a soldering iron.

I just have to tell another CB story. This guy comes into the two way shop I'm working at in 1975 with a CB. He had hooked it up backwards and it blew up a little diode they have in there to BLOW the fuse before doing damage to the radio.

Well genius knew how to fix that problem and he plugged first a ten amp and then a thirty amp fuse in the fuse holder. Well the second time the radio started on fire.

It melted all sorts of stuff around that little diode that of course VAPORIZED when he applied an unstoppable force.

Well he then figured he'd fix it. He stoked up his trusty BUNZ-O-MATIC torch and melted (I SWEAR TO GOD) a whole roll of Acid core flux solder on the circuit board.

The bigger the mess the more he paniced and the more heat and more solder he applied.

Well he came into the shop and I got called out front. The owner wasn't there...

He didnt have covers on it and he says, "Can you fix this?" I had it in my hand and said, "You used the torch on it didnt you?" YEAH...

I just happened to be standing over the garbage can in the office and I just let it go...

As it hit the can I turned around and said NO... and walked back in the shop.

I was a real As***** in those days.

BOB
 
#8
Thanks for all the replies. I bought this amp used about a year ago and it worked fine. So any repairs that were done were not by me. I suppose I'll take it in somewhere... but where? Do guitar shops do this kind of thing?
 
#13
rbonner said:
The good news is the correct value is a 270 Ohm resistor at 2 Watts. The bad news is something caused this to happen. Your tech is definately a beginner with the BUNZ-O-MATIC torch used as a soldering iron.

I just have to tell another CB story. This guy comes into the two way shop I'm working at in 1975 with a CB. He had hooked it up backwards and it blew up a little diode they have in there to BLOW the fuse before doing damage to the radio.

Well genius knew how to fix that problem and he plugged first a ten amp and then a thirty amp fuse in the fuse holder. Well the second time the radio started on fire.

It melted all sorts of stuff around that little diode that of course VAPORIZED when he applied an unstoppable force.

Well he then figured he'd fix it. He stoked up his trusty BUNZ-O-MATIC torch and melted (I SWEAR TO GOD) a whole roll of Acid core flux solder on the circuit board.

The bigger the mess the more he paniced and the more heat and more solder he applied.

Well he came into the shop and I got called out front. The owner wasn't there...

He didnt have covers on it and he says, "Can you fix this?" I had it in my hand and said, "You used the torch on it didnt you?" YEAH...

I just happened to be standing over the garbage can in the office and I just let it go...

As it hit the can I turned around and said NO... and walked back in the shop.

I was a real As***** in those days.

BOB
Click to expand...

Great story! What I would have done...:cool:
 

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