Set-Up Adjustments; Screen Voltage Adjustment (Rough Alignment); Screen (G2) Adjustment; Focus Rough Adjustment - Sony KP-44PX2 Service Manual

4-1. 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
R

4-2. SCREEN (G2) ADJUSTMENT

1. Turn on the power of the set.
2. Select VIDEO1 mode without signals.
3. Supply DC 175 ±0.5 V from external power supply to
TP7103 (KR), TP7203 (KG) or TP7303 (KB) of CR board,
CG board and CB board.
4.
Adjust red, green and blue screen voltage, with SCREEN
VR on the focus packuntil retrace line disappears .

4-3. FOCUS ROUGH ADJUSTMENT

1. Loose the lens screw.
2. Program Remote Commander for operation in Service
mode (See Page 23).
3. Place the caps on the red and blue lens so that only the
green color is shown.
4. Press "VIDEO" "VIDEO" "5" "6" on the remote
commander to enter 'Projector Engine'. Press "6" twice
on the Commander to display the test signal (crosshatch)
on the screen.
SECTION 4 SET-UP ADJUSTMENTS
G B
SCREEN
G B
FOCUS
Focus Pack
Fig. 4-1
Test signal
Fig. 4-2
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 top right corner.
7. Perform the same alignment for red and blue lenses and
electric focus.
8. Fix lens screw.
Lens
Fig. 4-3
4-4.

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 set screw 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 (neck) of the CRT.
5. The tilt of the deflection yoke for red and blue is aligned
the same as was done for green.
2-pole magnet
Neck Assy
Make sure deflection yoke is
touching CRT closely.
– 20 –
KP-44PX2/44PX2U
A
Minimize both A and B.
B
Fig. 4-4
4-pole magnet
Deflection yoke
Anode cap
Fig. 4-5
RM-938