Soundstream Rubicon 604

[S Merlington]

Amp powers up and produces both + - rail voltages also produces both + - 15 volts on all op-amps..

Amp has no sound and all 4 of the clip lights are solid red all of the time..

Any ideas??

[1moreamp]

The clip leds are shunted/switched by a MPS8599 transistor that gets it signal from the FEB modules. The transistor shunts across the led and it base is driven from one of the FEB's outputs. Check Q101, Q102, Q122, and Q123 for proper operation.
The rails should be as below:
P. S. RAILS: HV: +/- 29.5V
HC: +/- 23V
RB: +/- 18V

Hope some of this info is helpful...

[S Merlington]

Q101, 102, 122, 123 all have the same voltages on them

They test fine out of the board heres the voltages i get


Emitter:29.22
Base:28.54
Collector:29.22

Clip lights went off but amp still has no output

[S Merlington]

Ok if i plug the Rca jacks into channels 3 and 4 i get sound from all channels..

If i plug the rca's into channels 1 and 2 i get no sound..

Any ideas?

[jeanious2011]

Rca input switch, rca solder broken?

[Perry Babin]

Are you sure that you don't have that backwards? The amp can feed all 4 channels with input from channels 1 and 2 but not by feeding 3 and 4 (unless I'm misreading the manual).

http://www.soundstream.com/manuals/A...b204404604.pdf

[S Merlington]

Ok yeah channels 1 and 2 feed all 4 channels..

If i plug the rca jacks in channels 3 and 4 i get no sound..

The Rca Jacks for the RCA outputs are broken ..

Anyone know where i can buy a new set of Jacks or does anyone have some laying around i can buy ??

[Perry Babin]

There is a switch on the bottom of the amp that allows you to feed all channels individually. It's shown in the manual.

I don't have a source for the jacks. How are they broken?

[S Merlington]

The part where u plug the rca jack into is snapped off

[Perry Babin]

It won't be a perfect match but if you have no other options, maybe something like THIS will work.