Help with REL T3 subwoofer

[woyojes]

Hi,

Anyone have a schematic for the amp i an REL T-3 subwoofer?

My T-3 is blowing fuses. I'm pretty sure the output transistors are shorted. The appear that way when measure in the circuit. I'll pull them today and retest. routerlogin

In tracing the circuit, it does not appear that there is any voltage regulation for the output transistors. Current flows from the transformer to the PS caps and then to the transistors. 192.168.l.l

I can't find any VR ICs on the board, though there is one op-amp that could be in a part of a VR circuit.

Is it comment for outputs to be driven from an unregulated source? 192.168.0.1

Finally, assuming the transistors are bad and a replace all 4 (2 NPN, 2 PNP), are there any guidelines for setting the idle current if I don't have a schematic or manual? Should I just leave it as is in that case?

Thanks in advance.

 

[fenug]

Photos will probably help even if schems eventually turn up.

After removing the output devices (assuming they're dead) I recommend looking at the drive components for collateral damage (or possibly the root cause of the output BJTs' failure).

 

[magconpres]

Did you ever fix your T-3? I have the same issue (fuse and output trans). I've been working on tracing the circuit and making a schematic. Should be done this weekend. Just a few more things to check.

I email REL for the settings. We'll see if they share them.