Sony FD-42A - Adjustments; Hold Down Circuit Check; Horizontal Adjustment; Centering Adjustment

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.
.
Confirm
that
the
set
does
not
operate
when
ap-
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.