Hitachi V-151F - 3. User Adjustments; Trace Rotation Adjustment; Astigmatism Adjustment; Volts;Division Balance Adjustment

3. User Adjustments
RV1035
ASTIG
Left View
Remove top Cover
0
Right View
0 0 0
000
00^
□
" n
RVlll
DC BAL
RV143
GAIN
The following adjustments should be made by means
of a screw driver.
(1) TRACE ROTATION (Trace slope)
Adjust the TRACE ROTATION (T) on the front
panel when slight tilting of the trace is
caused by the effect of external magnetic
fields. Make certain that tilting of the traces
is not caused by the effect of unusually strong
external magnetic fields due to the position of
the oscilloscope.
(2) ASTIG ADJUSTMENT
Set the knob TIME/DIV (1^ to X-Y observing the
spot on the center of the screen.
RV1035 astigmatism adjustment provides optimum
spot roundness when used in conjunction with
FOCUS (3) and POWER/INTENSITY 0 control.
Little readjustment of this control is required
after initial adjustment.
(3) Adjust Volts/Division Balance (STEP ATT BAL)
a. Position the trace to the center horizontal
line with the vertical POSITION control.
b. Check - Change the V/DIV switch from 5mV to
lOmV. Trace should not move more than 0.1
division.
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