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GX-N5E
(REFERENCE) ADJUSTMENT
OF V. HOLD BY
LISSAJOUS METHOD
@ Preparation
© Measuring instrument
@ Low-frequency oscilloator
................. 40-60Hz
® Oscilloscope or monitor scope
.......... One having
X-Y or H input terminal is enough.
© Pickup point and connection method
... See Fig. 4-3.
@ Adjustment parts R828 V. HOLD VR on the EVF PCB
@ Adjusting procedures
1. Connect the measuring instruments as shown in Fig.
4-3
and set the oscillation frequency
of the low-
frequency oscilloator to 45 + 1Hz.
2. Remaove the connector on the EVF PCB and set the
vertical oscillation to the free-run status.
3. Connect the V input terminal of the oscilloscope to
the lead wire on the negative side of the C821 ELEC-
TROLYTIC
CAPACITOR
on the EVF PCB to obtain
figures on the oscilloscope.
4, Turn R828 V. HOLD VR until the Lissajous figures on
the oscilloscope stop in a stabilized state.
5. Reinstall the connector.
(Note) The vertical linearity and vertical amplitude should
be properly adjusted during this adjustment.
Oscilloscope or monitor scope
V input
H input
Low-frequency oscillator
OSC output
45+
1Hz
Fig. 4-3
V. HOLD Adjustment by Lissajous method
38E (No. 5391B)
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