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FD-42A
SECTION
1
ADJUSTMENTS
HOLD DOWN CIRCUIT CHECK
1.
Connect
regurated
dc power
supply to DC IN
6V jack (J601).
. Confirm
that
the set operates when
applying
7420.1V.
plying 8.7 + 0.1V.
Disconnect requrated dc power supply.
Connect requrated dc power supply as illustrat-
ed.
Confirm
that the set operates when
applying
6.0+0.1V.
. Confirm
that the set does not
operate when
F
+ OV
applying 7.2 _ 0.1V.
requrated dc
power supply
NOTE
1. Test Equipment Required
® regulated dc power supply
® color-bar/pattern generator
®@ frequency counter
® digital voltmeter
@VOM
. Input Signal
Cross hatch color-bar or off-the-air signal.
3. The adjustment should be performed with 6V dc
and
about
5 minutes warmup
unless otherwise
noted.
4. Position
the
set vertically
with
the
front
side
faced
to the north
for TV-section
adjustments.
to
Horizontal Adjustment
. Loosen the adjustment screw.
. Tune in a test or off-the-air signal and adjust de-
flection
yoke
for optimum
horizontal
picture.
. Tighten the screw after the adjustment.
Centering Adjustment
. Tune in a test or off-the-air signal.
. Adjust
the
two
centering
magnets
so that
the
picture is at the center.
. Lock
the magnets
with locking compound
after
the adjustment.
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