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S Merlington 28th December 2012 09:07 PM

Soundstream Rubicon 604
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 29th December 2012 12:35 AM

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 29th December 2012 01:44 AM

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

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


Clip lights went off but amp still has no output

S Merlington 29th December 2012 02:16 AM

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?

evianamp2011 29th December 2012 02:51 AM

Rca input switch, rca solder broken?

Perry Babin 29th December 2012 04:54 AM

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).

S Merlington 29th December 2012 05:29 AM

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 29th December 2012 05:39 AM

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 29th December 2012 05:41 AM

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

Perry Babin 29th December 2012 05:51 AM

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

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