2. Check all Full Positive Voltage connections. The term “Full Positive Voltage” is
used, because after D1 and R33, the voltage will be slightly diminished. Your positive
voltage may be 9V at “RED” location 1, but drop to 8.5V at location 2, and then drop
again to 8.2V at location 3. This is to be expected. But “RED” locations 3 - 8 should all
remain constant and should be somewhere between 9V and 8V if you are using a 9V
power supply. Set your DMM to test for 9VDC. Touch the black probe to the sleeve of
either jack. Touch the red probe to the various “RED” test locations on the PCB.
