Old School Orion 2350GX Anyone have tech info?

[SomeGuyInPDX]

I do have +16.2v and -16.2v on the legs on the RH side of the amp(The end with the rca imputs pict.1&2) and +16.0v and -16.0v on the LH side of the amp(the end with the speaker outputs pict. 3&4).
Pic#1 Pos 16.2
Pic#2 Neg 16.2
Pic#3 Neg 16.0
Pic#4 Pos 16.0
In Pic#5&6 Is the center section that has no readings on leg 3.(this may be normal)
Should I take the pics showing the meter? please let me know if that will make thing easier.

[Perry Babin]

Which board had the distorted output, the one nearest the preamp board or the one nearest the speaker harness plug?

[SomeGuyInPDX]

Sorry for taking so long. I had to use my car for a bench test, the Right channel has no output. left channel seems to be working. While in the car I double checked the wiring plug for the amp and all connections are tight and I also checked Input RCA's from the crossover and both L&R channels from the crossover work individually through the left channel input RCA on the amp to give a signal to the sub but nothing comes out of the right channel input of the amp. I tried the amps L&R output on each sub individually. Both of the subs work individually. So It must be in the amp somewhere. The channel that has no output is the +yellow wire and the - black w/yellow trace (Left channel?). Now I'm really confused! So it seems that the right channel input RCA on the amp plays nothing through the right channel output?(no signal) But the Left channel input RCA on the amp plays through the Right channel speaker output wires.
That is unless I’m wrong about the coloring on the speaker output wires (Yellow and black w/yellow trace is the Left channel correct?)

[Perry Babin]

You are correct. The right RCA drives the yellow and yellow and black wires.

Take the wires from one woofer and connect the negative terminal to the small black wire coming out of the amp. Touch the other speaker wire to all 4 speaker wires coming out of the amp. Which ones produce clean audio. Which do not.

[SomeGuyInPDX]

Just to confirm. Take the small ground wire (the one thats supposed to ground to the deck) and run it to the ground terminal of one of the subs, then test the right and left channels speaker wires to that sub (wiree normaly) and see which channel sounds the cleanest?_
Or do I just use that ground wire as the negative speaker wire, and try the four wires R+,R-,L+,L- to the positive speaker terminal to see which is the cleanest?

[SomeGuyInPDX]

Ok, Just tested using the sm. ground wire as the negative speaker wire and one by one tested each wire.
Yellow wire= no sound
Black with yellow trace= no sound
Orange wire= sounds nice
Black with orange trace= sounded little sloppy. Not as deep or as loud for the set volume as the orange wire
hope this makes sence to you, I'm lost.
pic#1 working left RCA
pic#2 left RCA to board
pic#3 Orange and black and orange wires out to speaker

[1moreamp]

Never mind my confusion

[Perry Babin]

This is actually a 4 channel amp that has two channels bridged for each output channel. The tests seem to indicate that you have 3 defective channels.

I'm assuming that the dead channels are always completely dead and nothing (moving the RCAs in the jack or rotating the gain control) make the amp produce any audio from that channel. Is that true?

Do you have a test tone CD or a sine wave generator?

[SomeGuyInPDX]

Yes, that is true I do not have anything at all out of the Yellow & Black w/yellow wires, the Black w/orange wire sounds out of phase, and the orange wire sounds good. You are correct, rotating the RCA's,Gain controls,wires, plug ect... has no effect. Sorry, I do not have a test CD or a sign wave generated.

[SomeGuyInPDX]

I don't know if it has any relevance to the issue and my timeline may be off a bit. My amp has been disconnected for about six months. When I disconnected the amp the sub that was connected to the yellow/blackyellow speaker wire did have some issues around the time that channel quit. During the previous few months (before it quit), I could hear one of the subs dropping in and out going down the road. I would just turn it down for a while and it would start working again. At the time I figured that one half of the amp was overheating and shutting down till it cooled a bit then it would start working again. Well one day the sub quit and never turned on again. That’s when I checked the wires inside the box and saw that the lead from the voice coil to the terminal appeared to have been hanging by a thread for a while and finally broke. Anyway, I soldered it back on and the sub works. That is when I realized that the channel that was running to it no longer worked so I disconnected the amp(but did not remove it) and hooked up a little Orion 225 HCCA for a temporary replacement. Now I don't know if the broken speaker lead was part of the reason the amp is not working or if it was coincidence that they both happened at once???