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SSL Center Section Module Caps??? Consoles
Old 1st January 2011
Gear Addict
SSL Center Section Module Caps???

I re-capped channels 1 - 40 on our SSL 4000G. Just wondering about the center section/ master output cards. Which of these cards are in the audio path for the console output? I'm assuming there is a card for each of the channels of the quad buss. What else? I'd like to make sure I re-cap everything in the audio path. Thanks.
Old 1st January 2011
Lives for gear
brianroth's Avatar

Altough I've worked on a few 4000's, it's been awhile, and I don't have any schemos to look at. That being said...pull out the service docs and find the master/center schematics. Anything that is hooked in/out of any of the opamps is in the signal path! <g>


Old 1st January 2011
Lives for gear

Basically you should be replacing / reviewing ALL electrolytic caps in the 'centre' section as although some may not be in the 'main path' they can nevertheless have some impact as they could be on the supply lines for example which would prevent distorted signal or some forms of 'crosstalk' from other apparently non related things like the oscillator and talkback systems.
Remember the supply rail capacitors ARE in the audio path but the effect of them is different to the more obvious 'in series with' positions.
Matt S
Old 1st January 2011
Gear Addict
Thanks. Our studio was re-modeled a few years back and the shop manuals were unfortunately misplaced by someone during that time.

I'll probably just do all the caps on every card. Aside from the 651 module, is there any other area I should address?
Old 1st January 2011
Lives for gear

There is a card in the rear or underneath which has a load of 'unity gain' buffers which if I remember are to do with monitoring or metering. This could usefully be recapped.
Matt S
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