Quote from: J M Fahey on November 19, 2013, 09:23:26 AM
Start with a full chassis one, taken perpendicular (straight from above) , and then we'll ask "please a close up from here or there"
The power transistors might have been bolted straight to the chassis, so all you'd find would be a few "unused" holes.

Ok great, I'll do that. And no, no unused holes other than two which allow the nuts holding the handle on to fit into the chassis.

Quote from: Enzo on November 18, 2013, 10:42:35 AM
Um... Q5 Q6 are the output transistors, if you don;t have those, you don;t have an amplifier.   It is possible they have been removed, and might have been mounted on the chassis.   But the amp must have them.

That's what's weird. There's no spot on the board for them. I guess like you're saying they could have been mounted elsewhere, but there just isn't any place I can see where they would have been. I'll definitely put up some pictures ASAP. What kinds of things should I get pictures of? Top and bottom of the board and maybe the mains wiring?

Ok, cool. I'll try that soon. One thing to note, I was comparing the schematic to my amp and noticed my amp does not have Q5 or Q6. I'm thinking the schematic was a different version of the amp? But anyways, how can I go forth if I'm trying to repair my amp with a schematic that's not entirely accurate.
EDIT: Also, just curious, but my amp doesn't have a fuse that I can find. Should it have one?

Quote from: Enzo on November 14, 2013, 10:17:22 PM
ANy amp must have mains wiring to operate.  The power cord plugs into the wall, and mains power comes up it to the amp chassis.  That is wired to the power switch and fuse and to the primary of the power transformer.   All that will have to be established.   You will have to determine which wires are which on the power transformer.

We will want to test the transformer before going too far into this.  A shorted transformer may put the brakes on in your project.

One might want to think about all the wires were disconnected for a reason.

http://reverb.com/item/10206-univox-ub252-1973-black
Is it that?

Before doing mu reconstruction, I would check the output transistors for shorted condition, and same at the main rectifers.


Here:

Wow man, thanks! That's the amp alright. How would I check the transformer, with a voltmeter? And by rectifier are your talking about the diodes or something else?

So I bought this old Unicode (Univox?) Bass amp head which doesn't power on. I opened it up and there are some wires from the board which are not connected to anything and neither the power cable now the power switch are  wired to anything. Unfortunately there is little to no information on these amps so I'm looking to see if anyone can help me figure out where all the wires go to get it working again. Can provide pictures and any other information as necessary. Thanks!