Troubleshooting Boss CH-1 with no output whatsoever...

Started by jimosity, April 21, 2009, 06:12:42 AM

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jimosity

Got a Boss CH-1 that allows no audio to pass thru what-so-ever.
The LED will come on, but that's it.
I've tested for any bad traces on the board and checked the jacks and everything in those two locations appears to be decent.
I've not tested each resistor or cap; because I'm getting the feeling that it's a dead IC and wanted to ask here before I go much further to see if this is a familiar situation.
It's stock, so no mods - just dead.
...and yes, I've tried searching...
Jim Rodgers
jim@americanhc.com

Mike Burgundy

all the debugging steps described in the "debugging" sticky elsewhere on this board apply.
Check voltages at the opamp pins, use a signal tracer to check where the path is broken (IC1 - 5218 pin 5 (input) then 7 (out) then the next stage pin3, then 1 , etc. Follow the schem.)
Do you know anything of the pedals history? Was reverse voltage applied, for instance?

domenico

Hi I've the same problem and I need an information .
Do you have the digital or the analog one ? I have a digital boss ch-1 I would like to know the value of IC6.
Could you please help me ?
thanks
Domenico