This is the DC Balance Adjustment
procedure for the 222C Integrated Stereo Amplifier, quoted directly from the H.H.
Scott "Service Bulletin."
"Equipment Needed - Oscilloscope and/or AC VTVM, 16-ohm resistive load
of adequate wattage (some wirewound resistors have considerable residual
inductance and these should be avoided).
The DC balance pot for each output stage is located between the output
tubes for that (respective) stage. These controls should be adjusted when the
output tubes age appreciably or are replaced. To set these controls use
the following procedure:
(a) Connect the 16-ohm resistor across the (speaker) output
terminals of the channel under test.
(b) Connect the oscilloscope and/or AC VTVM across the resistor, and turn
the horizontal selector of the scope to "LINE."
(c) Remove the phase/inverter tube (6U8/6GH8) of the
output stage under
test.
(d) Adjust the proper DC Balance Control for a minimum 120 cycle
response on the scope or minimum reading on the AC VTVM.
(e) Repeat the entire procedure for the other amplifier stage."
