Set-Up Adjustments; Screen Voltage Adjustment (Rough Alignment); Focus Adjustment; Screen (G2) Adjustment - Sony KP-XA43M31 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.
R
SCREEN
R
FOCUS
FOCUS Pack
Fig. 3-1

3-2. FOCUS ADJUSTMENT

1. Loose the lens screw.
2. Set in service mode.
3. Place the caps on the red and blue lens so that only the green
color is shown.
4. Press the Commander button and select OSD (CHSW) to
display the test signal (crosshatch) on the screen.
5. Rotate the green lens and align with the optimal focus point
from the test signal.
6. Rotate the green VR on the FOCUS Pack and align to obtain
the optimal focus point.
7. Perform the same alignment for red and blue lenses and elec-
tric focus.
8. Fix lens screw.
Test signal
Fig. 3-2

3-3. SCREEN (G2) ADJUSTMENT

1. Connect JIG (A) to 200 V and GND.
2. Select VIDEO mode without signals.
3. Connect JIG to the TP701(KR), TP731(KG) or TP761(KB)
of CR board, CG board and CB board.
4. Adjust R, G and B screen voltage to until retrace line disap-
pears with screen VR on the focusblock.
SECTION 3

SET-UP ADJUSTMENTS

G B
G B
(A)
200V
Lens
Fig. 3-4

3-4. DEFLECTION YOKE TILT ADJUSTMENT

1. Set to receive the Monoscope signal.
2. Set in service mode.
3. Place the caps on the red and blue lens so that only the green
color.
4. 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.
5. After aligning the deflection yoke, fasten it securely to the
funnel-shaped portion (neck) of the CRT.
6. The tilt of the deflection yoke for red and Blue is aligned the
same as was done for green.
2-pole magnet
Neck Assy
– 22 –
KP-XA43M31/XA43M61/XA43M91
KR, KG, KB
5.6K/3W X3
<2.2K/3W>
Fig. 3-3
Scanning line visible.
A
Minimize both A and B.
B
Fig. 3-5
4-pole magnet
Deflection yoke
Anode cap
Fig. 3-6
RM-967
GND