Check/Adjust Variable Volts/Division; Check/Adjust Vertical X5 Balance (R 128); Perfo Rm Ance; Adjust Deflection Plate Dc Level - Tektronix 324 Instruction Manual

9. C h eck/A d ju st Variable Volts/Division
Balance
a. Position the trace to the center horizontal line
with the vertical POSITION control.
b. CHECK-Rotate the VARIABLE VOLTS/DIV con­
trol throughout its range. Trace should not move more
than one division vertically (if the trace is not visible at
all, preset the VAR V /D IV BAL adjustment to bring
the trace on screen).
PERFO RM ANCE CHECK O N L Y
A djustm ent accessible through c u to u t in b o tto m o f
cabinet; can be adjusted as p a rt o f perform ance
check.
c. ADJUST— VAR V /D IV BAL adjustment, R107 (see
Fig. 5-5), for no trace shift as the VARIABLE VOLTS/
DIV control is rotated. If necessary, use the vertical
POSITION control to keep the trace on screen during
this adjustment.
10. Check/Adjust Vertical X5 Balance
a. Return the VARIABLE VOLTS/DIV control to
CAL.
b. Position the trace to the center horizontal line
with the vertical POSITION control.
c. Pull the X5 VERT GAIN switch out (to prevent
changing knob position, the X5 VERT GAIN switch can
be actuated using the vertical POSITION control bracket
behind the front panel).
d. CHECK— Trace shift less than 1.5 division verti­
cally.
PERFO RM AN CE CHECK O N L Y
A djustm ent accessible through c u to u t in b o tto m o f
cabinet; can be adjusted as p a rt o f perform ance
check.
e. ADJUST— VERT X5 BAL adjustment, R128 (see
Fig. 5-5), to return the trace to the center horizontal
line. Repeat parts b through e for minimum trace shift
as the X5 VERT GAIN switch is pulled out.
f. Push the X5 VERT GAIN switch in.
Performance Check/Calibration—Type 324
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Fig. 5-5. Location of vertical adjustments (Vertical board).
g. Recheck step 9. If readjustment is necessary, re­
check this step also.
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11. Adjust Deflection Plate DC Level

PER FO R M AN C E CHECK O N L Y
T h is step is n o t applicable
check; proceed w ith step 12.
a. Connect the DC voltmeter from point M of the
Vertical board (see Fig. 5-5) to chassis ground.
b. Rotate the vertical POSITION control fu lly clock­
wise and note the meter reading. Then rotate the verti­
cal POSITION control fully counterclockwise and again
note the meter reading.
c. CHECK—Voltage range measured in part b cen­
tered around +50 volts.
d. ADJUST— Upper Defl Plate DC Level adjustment,
R141 (see Fig. 5-5), to center the measured voltage
range around +50 volts.
e. Connect the DC voltmeter from point N of the
Vertical board (see Fig. 5-5) to chassis ground.
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to a perform ance
5-13