Set-Up Adjustments; Screen Voltage Adjustment; (Rough Alignment); Screen (G2) Adjustment - Sony KP-FX43M31 Service Manual

3-1. SCREEN VOLTAGE ADJUSTMENT

(ROUGH ALIGNMENT)

1. Receive the Monoscope signal.
2. Set 50% BRIGHTNESS and minimum PICTURE.
3. Turn the red VR on the focus pack all the way to the left and
then gradually turn it to the right until the point where you
can see the retrace line.
4. Next gradually turn it to the left to the position where the
retrace line disappears.
Fig. 3-1

3-2. SCREEN (G2) ADJUSTMENT

(FINE ADJUSTMENT)
1. Turn on the power of the set.
2. Select VIDEO1 mode without signal.
3. Supply DC 175 ± 0.5 V from external power supply to KR,
KG or KB of CR board, CG board and CB board.(Fig.3-2)
4. Adjust red, green and blue screen voltage to until retrace
line disappears with screen VR on the focus pack.
5. Confirm if retrance can be seen.
Power
Supply
Fig. 3-2

3-3. FOCUS ROUGH ADJUSTMENT

1. Loose the lens screw.
2. Set in the service mode.
3. Place the caps on the red and blue lens so that only the green
color is shown.
4. Press "1" or "4" button on the commander and select
"PJE", press "6" three times on the Commander to display
the test signal (crosshatch) on the screen.
Test signal
Fig. 3-3
SECTION 3

SET-UP ADJUSTMENTS

Focus Pack
FOCUS
B G R
SCREEN
B G R
+
–
Dummy Resister
3k ohm 20W
5. Rotate the green lens and align to obtain the best lens focus
at the center area.
6. Rotate the green focus VR on the focus pack and align to
obtain the best electrical focus in the center area.
7. Perform the same alignment for red and blue lenses and elec-
tric focus.
8. Fix lens screw.
Lens
Fig. 3-4

3-4. DEFLECTION YOKE TILT ADJUSTMENT

1. Receive the Monoscope signal.
2. Place the caps on the red and blue lens so that only the green
color.
3. Loosen the deflection yoke setscrew and align the tilt of the
Deflection yoke so that the bars at the center of the
monoscope pattern are horizontal.
4. After aligning the deflection yoke, fasten it securely to the
funnel-shaped portion of the CRT.
5. The tilt of the deflection yoke for red and blue is aligned the
same as was done for green.
4 Pole Magnet
2 Pole Magnet
Holder
Make sure deflection yoke is
touching CRT closely.
– 17 –
KP-FX43M31/M61/M91
KP-FX53M31/M61/M91
Scanning line visible.
A
Minimize both A and B.
B
Fig. 3-5
Anode cap
Deflection Yoke
Fig. 3-6
RM-998