Sony KP-44PX2 / KP-44PX2U Service Manual ▷ View online
– 17 –
KP-44PX2/44PX2U
RM-938
3-7.
BEZNET BLOCK REMOVAL
3-9.
AP AND D BOARD REMOVAL
2
4
1
3
Beznet block
Five screws
(Hexagon head)
Eleven screws
(+BVTP 4x16)
Four screws
(Hexagon head)
1
2
3
5
4
Three claws
Six screws
(+BVTP 3x12)
Screw
(+BVTP 3x12)
Screw
(+BVTP 3x12)
Printed circuit
board support
4
6 AP board
Claw
7
D board
3-8.
HIGH-VOLTAGE CABLE REMOVAL AND
INSTALLATION
INSTALLATION
1
2
1
2
(1) Removal
(2) Installation
3
4
Rubber cap
Rubber cap
HV cable
turn 90
HV cable
Hook
Gutter
– 18 –
KP-44PX2/44PX2U
RM-938
3-10. TERMINAL BOARD REMOVAL
3-11. G BOARD REMOVAL
1
2
G board
Five claws
2
1
Terminal board
Six screws
(BVTP 4x16)
– 19 –
KP-44PX2/44PX2U
RM-938
3-12. A BOARD REMOVAL
1
2
A board
Screw
(+BVTP 3x12)
Two claws
3
4
3
1
2
3-14. PICTURE TUBE REMOVAL
6
Four screws
(+BTVP 4x16)
5
7
Removing the arrow-marked screw is strictly inhibited.
If removed, it may cause liquid spill.
Four screws
(+BTVP 4x16)
Lens
CR board
Neck assembly
Deflection yolk
Picture tube
3-13. CHASSIS BLOCK REMOVAL
3
Screw
(Hexagon head)
4
3
1
2
Screw
(Hexagon head)
Two screws
(Hexagon head)
Three screws
(Hexagon head)
Chassis block
– 20 –
KP-44PX2/44PX2U
RM-938
Fig. 4-1
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.
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 .
4-4.
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.
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.
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.
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.
the same as was done for green.
Fig. 4-5
Neck Assy
Make sure deflection yoke is
touching CRT closely.
touching CRT closely.
2-pole magnet
4-pole magnet
Deflection yoke
Anode cap
R
G
SCREEN
B
R
G
FOCUS
Focus Pack
B
Fig. 4-4
Lens
Fig. 4-3
Fig. 4-2
Test signal
Minimize both A and B.
A
B
5.
Rotate the green lens and align to obtain the best lens
focus at the center area.
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.
obtain the best electrical focus in the top right corner.
7.
Perform the same alignment for red and blue lenses and
electric focus.
electric focus.
8.
Fix lens screw.
SECTION 4 SET-UP ADJUSTMENTS
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.
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.
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).
mode (See Page 23).
3.
Place the caps on the red and blue lens so that only the
green color is shown.
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.
commander to enter 'Projector Engine'. Press “6” twice
on the Commander to display the test signal (crosshatch)
on the screen.
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