Squire Amplifier

[gbeeker]

I have a Squire Amplifier (model BP-15) that I wanted to repair. It was working fine, but the input jack was stripped. So I ordered a replacement without a stripped mount. I unsoldered bad one and soldered the new one on. Problem was the volume pot broke off in the process so I had to replace that too. Now I have replaced both parts, but when I plugged it in the first time, the light went on, i heard a pop, and the light went out. Now nothing happens when I click it on.

I'm a newbie so I appreciate any help with troubleshooting this.

First thing I checked was the fuse, and it is good.

I'll try to upload a picture of the board.

[gbeeker]

Re: Squire Amplifier

The amp and board pics are attached.

[selldoor]

Re: Squire Amplifier

Can you post a straight on picture of the back of the board. and a straight on one of the top. Have you inspected it with a magnifying glass to see if anything is burnt or cracked.
Checked your soldering?
Have you a multimeter?
Was it all back together when you tried it
What is that small board on the white wires does that attached to a heat sink,
was there any isolation washers and did you replace them

[gbeeker]

Re: Squire Amplifier

Thanks for the quick reply. Here is the top and bottom circuit board straight on.

The little white wires go to a power transistor.
Good idea I will check closely with a magnifying glass.

I do have a multimeter. What should I check with it?
I know how to check resistors and diodes. Not sure about testing capacitors - I'll read up on that in the forum.

[gbeeker]

Re: Squire Amplifier

What is an isolation washer? There was a thin plastic piece for the power transistor that I didn't see before - with some white cream on it.

[selldoor]

Re: Squire Amplifier

Bottom of the board picture isnt sharp enough
Yes But was it on a heatsink when you tested and if so was there an electrically isolating washer and did you replace it.
The fuse does not look blown or is it a new one.
Only couple of odd things I can see are there are 2 resistors? behind one of the outpt sockets are the legs touching? and test R12 what is that on the board if its flux clean it off with isopropyl alcohol