Anyway, back to the topic at hand...
jajoyner wrote:
Morgan wrote:
What is the resistance to the ground tab of the output jack from the wire that goes to switch lug 1 (when that wire is disconnected from the switch)?
When I connect the output jack ground tab to the lug 1 wire that is disconnected, the resistance is 0.00 but the light brightens like the effect is engaged.
This is why the LED is lighting in bypass. The Q2 collector is being shorted to ground and it shouldn't be.
This is how I would go about chasing down this short to ground:
- remove the wires entireley from the PCB to switch lugs 1 and 2
- test for proper switch operation without the wires installed to confirm again that the switch is fine
- Confirm that PCB pad 2 has continuity with ground (it should)
- Confirm that PCB pad 1 has continuity with ground (it should not), If pad 1 does not have continuity with ground, you've already fixed it. Reinstall new wires.
- Visually inspect the PCB trace from PCB pad 1 to the Q2 collector for any signs of a possible short to another point on the pcb
- Confirm that the Q2 collector has continuity to ground (it should not)
- Remove Q2 and check to see if the PCB pad for the collector or ewither of the other 2 PCB pads have continuity to ground (if not, replace Q@ with a new transistor)