Solid Audio F2000 Demons

[goviboo]

GD gents,
Does anyone have any schematics or similar schematics for solid audio f2000 amplifiers? The board is very similar to American Bass SQ3000 amplifier.

I got this one in and several demons to work out, severely mixed amplifier components, to-247 and to-220 in both channels, with the shorted components removed, the unit goes into protect. Disabling protect, the unit powers up ok with good rail and regulated voltages. But there seems to be DC at the R-ch Spk terminals.
Haven’t disassembled fully yet, still assessing.

 

[Perry Babin]

Are any of the traces corroded through? Some appear to have some degree of corrosion.

 

[goviboo]

I haven’t disassembled yet, but yes there appears to be sone corrosion, especially around the black adhesive applied at the base of the emitter resistors.
The few on top the pcb tested ok this far.

 

[Perry Babin]

Is that op-amp in the center of the audio section for audio or is it used to switch regulated voltage for the differential amplifier section?

 

[goviboo]

no audio.

 

[Perry Babin]

Do you see voltage switching from regulated voltage to ground on the two output pins after a short delay?

 

[goviboo]

Yes

 

[Perry Babin]

This amp uses a similar design. See if anything else is similar.

 

[goviboo]

will take a look at it and compare.
Much appreciated.