Mod THE PERSUADER Instructions Manual page 18

Use this troubleshooting supplement to help:
Measure DC voltage test points to identify major discrepancies and locate problem areas.
(Keep in mind that the voltage measurements will vary slightly from kit to kit. The voltages you measure should be in
the same ballpark, but do not expect to get the exact same value.)
Test Point Location Description
A
Positive power supply voltage
B
C
Tube pin 1 (plate)
D
Tube pin 6 (plate)
E
Tube pin 2 (grid)
F
Tube pin 7 (grid)
G
MOSFET "Source" lead
H
MOSFET "Gate" lead
I
MOSFET "Drain" lead
Using a volt meter, connect the ground side lead of the meter to any ground point on the pedal.
One ground point would be the output jack's ground lug. The other volt meter lead will be used to
measure DC voltage at the test points listed above and shown in the drawing on the next page.
First, plug a guitar cable into the input jack and take measurements at each test point with both
controls turned all the way down taking note of each measurement. Next, take measurements at
each test point with both controls turned all the way up and take note of each measurement. Any
major differences between the voltages listed above should indicate a problem area.
Terminal #5
Controls turned to minimum
9.2 VDC
8.8 VDC
8.3 VDC
7.0 VDC
0 VDC
0 VDC
1.6 VDC
3.4 VDC
7.1 VDC
5
1
1
Controls turned to Maximum
9.2 VDC
8.3 VDC
7.8 VDC
6.7 VDC
0 VDC
0 VDC
0 VDC
1.9 VDC
4.0 VDC