Input of TS goes to ground when powered ?

Started by petemoore, November 17, 2009, 04:06:24 AM

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petemoore

  When the battery is disconnected, C1 and R1 no longer short to ground !
 http://www.generalguitargadgets.com/index.php?option=com_content&task=view&id=82&Itemid=99999999
 Workin' with this PCB has no trace-map.
 Byoc kit, I can't find a trace maps for their PCB's.
 I've been drawing partials for them.
 So I've been tracing through and it's also amazing how much signal drop there is across R1 [1k], which is grounding the input through the battery somehow.
 Signal seems to be making it from the output back to R1/Q1 base, I'd rather use the board components, I suppose I'll have to try building C1/R1 again offboard or cut some traces and wire the darn thing right.
 Seems like it used to work.
Convention creates following, following creates convention.

petemoore

  Sounds Great !
  All I had to do was deb-ughh the mystery board starting at the output, trace to resistor [measure resistor] to trace to cap [skip over the cap], ugly, time consuming, yet effective.
  Finally, at R1/C1, a signal stop, short to ground.
  Lifting and reconnecting R1/C1, fires right up, everything works !
  Note to self: Make sure you've got a trace map of the artwork before purchasing a PCB, I was very careful, and close-in magnification shows a very clean construction [ie...maybe there was a hair-trace there, certainly looked like a PCB miswire though.
 
Convention creates following, following creates convention.