Sony KP-44DX2U Service Manual ▷ View online
– 17 –
KP-44DX2
RM-948
(1) Removal
(2) Installation
Rubber cap
1
HV cable
turn 90
2
Rubber cap
1
HV cable
2
Hook
3
Gutter
4
3-7.
BEZNET BLOCK REMOVAL
3-9.
AP AND D BOARD REMOVAL
3-8.
HIGH-VOLTAGE CABLE REMOVAL AND
INSTALLATION
INSTALLATION
Screw
(+BVTP 3x12)
4
Six screws
(+BVTP 3x12)
2
Printed circuit
board support
1
Claw
7
AP board
6
Screw
(+BVTP 3x12)
4
D board
3
Three claws
5
Five screws
(hexagon head)
3
Four screws
(Hexagon head)
4
Beznet block
2
Eleven screws
(+BVTP 4x16)
1
– 18 –
KP-44DX2
RM-948
Five claws
1
G board
2
Six screws
(BVTP 4x16)
2
Terminal board
1
3-10. TERMINAL BOARD REMOVAL
3-11. G BOARD REMOVAL
– 19 –
KP-44DX2
RM-948
Picture tube
6
Deflection yolk
5
Neck assembly
4
CR board
3
Four screws
(+BVTP 4x16)
7
Four screws
(Hexagon head)
1
Lens
2
Removing the arrow-marked screw is strictly inhibited.
If removed, it may cause liquid spill
If removed, it may cause liquid spill
Screw
(Hexagon head)
3
Two screws
(Hexagon head)
1
Three screws
(Hexagon head)
2
Chassis block
4
Screw
(Hexagon head)
3
3-12. A BOARD REMOVAL
3-14. PICTURE TUBE REMOVAL
3-13. CHASSIS BLOCK REMOVAL
Two claws
3
screw
(+BVTP 3x12)
1
A board
2
– 20 –
KP-44DX2
RM-948
Fig. 4-1
4-3. 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 pack until retrace line disappears .
VR on the focus pack until 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 is shown.
green color is shown.
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 at the centre area.
obtain the best electrical focus at the centre area.
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.
4-2. 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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