JBL Reciever blown?

[joetech]

A work collegue brought in a JBL DCR600II that wasn't working. His neighbor gave it to him. Seems the guy was running some speaker with through a hole in the wall and ran it into 120VAC. (Why was the other end still connected to the reciever?) Anyway, there was a loud pop. No smoke or flames .
I've built a few speakers systems and a Heathkit amp back in the day so I guess I am the closest thing at work to an expert. It does power up for a few seconds and then turns off. There is a relay that I hear switch on and back off. This relay is near the speaker out terminals. There is a bottom access panel on the bottom I removed and didn't see and fried traces. On top I don't see any fried or melted conponets or wires. The access panel didn't uncover the area directly under the speaker outputs.
I assume the relay is a speaker protection circuit. Can we just replace the relay? The circuit board would be a major pain to remove. Is this thing toast? I did a little research on this unit and I see its part of the 'theater' system enter level.

 

[markw]

Can you clarify this a little?

IIRC, it seems a speaker cable was, at one end, connected to a speaker output on the receiver, while the other end was of that same speaker cable was plugged into 120VAC?

Is this correct?

 

[joetech]

My understanding is that the original owner was fishing the speaker wire through a wall and contacted an AC source. Not exactly plugged into an outlet. But ,yes 120VAC came back through the speaker terminal. Don't know which one. Doesn't seem to matter. I did a little more research. This think is pretty cheapo. Not really worth much brand new.

 

[warzaz]

Hi,
I just posted a new thread about troubleshooting a JBL DCR600II receiver. I had noticed that old thread, and was wondering if you ever were able to fix your unit. What was the culprit and how would you suggest to fix it? I found the service manual if you want it, just let me know your email since file is too large to post here. Thanks so much, Michael