02-13-2013 03:38 PM
I need help troubleshooting this pedal. The signal comes through on bypass but nothing or very faint when not. I've been working on it for about 3 weeks.....thought I could fix it. I've bought and replaced numerous components. From all I have read - the switch or battery wires are the most likely. I have replaced the switch, all 3 transistors (MPSA13 & (2)MPSA18)(4.4vdc to 4.6vdc) and 220uf & 4.7uf caps. Desoldered other 7 caps and the diode to verify proper readings. Verified all resistor readings in circuit. Desoldered red fasle - 15 ohms. Battery reads 9.3v. Hotpot reads yel & blk wires 2 - 102k ohms. Please help me.
02-14-2013 08:48 AM
When my Dunlop wah was not working it was the adapter power-in jack. It is only soldered to the board with no other support. I traced it back and instead of trying to solder the traces I ran wire.
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