C Audio SR606 Schematic

[packer]

Greetings,
Could any one help with a schematic for an early SR606?

I have approx -25v sitting on the P & N terminals on the drive PCB.
when I remove these connections from the drive PCB and take them to ground Amp comes out of protect.

Located open zener on +18v supply replaced it and the op amp.
Removed all transistors on the drive PCB and tested with a DCA60
none reported faulty.

any help would we welcome..

[packer]

Hello,
If anyone has a schematic for this could you plese mail it to tsc@f2s.com

I am not able to mail member "kamskoma" Who has one

if another member could contact him for me I would be extremely gratful.

[lee.basham]

Hi Packer,
first things first, you need to replace R24, R34, and R50 with 27k 1W PR01 resistors and mount them so they are at least 10mm off the pcb.
the existing ones will either be 22k, or 24k and may be 1/4W or 1/2W

If you have had to replace the 18V zener in the op-amp supply replace the TL071 as well.

the schematic will follow shortly which shows the resistors to change.

changing these resistors will fix around 80% of SR faults if not drop me a line on

lee.basham@lj-electronics.com

or call me on

07768551482

thanks
Lee Basham