Instruction manual

Checks and Adjustments
1720/1721
5-21
g. Adjust R571 (Orthogonality) on the Main board for a straight vertical
line parallel to the Y axis.
h. Disconnect the Function Generator from the 1720/1721.
5. Adjust On--Board Regulated Power Supplies
a. Connect the voltmeter ground lead to one of the rear-panel ground lugs
and the active lead to the --11.8 V test point. See Figure 5-9.
A3 Main Bd
Front
R267
R259
-- 1 1 . 8 V
ADJUST
+11.8 V
ADJUST
-- 1 1 . 8 V
Test point
U172U164
+11.8 V
Test point