Figure 7. M1H balance adjustment.

TB 9-4931-491-24

(4) If oscilloscope does not indicate a waveshape symmetrical about 0 V and 32 V p-p,

perform b below.

b. Adjustments

(1) Adjust M1H CENT control until waveshape is symmetrical about 0 V (fig. 3) (R).

(2) Adjust M1H SIZE control until amplitude is 32 V p-p (fig. 3) (R).

NOTE

These are preliminary adjustments only. Final adjustments

will be made in paragraph 16 below.

(3) Adjust VAR/MANUAL control fully ccw.

(4) If sweep time as displayed on oscilloscope is not 0.12 seconds (fig. 7), adjust M1H

INT BAL (fig. 3) (R).

Figure 7. M1H balance adjustment.

(5) Set SWEEP TIME SEC to LINE.

(6) If signal is not clamped at -16 V (fig. 8), adjust M1H CLAMP (fig. 3) (R).