Sony KP-48PS1 / KP-48PS1K / KP-53PS1 / KP-53PS1K / KP-61PS1 / KP-61PS1K Service Manual ▷ View online
– 25 –
KP- 48PS1/53PS1/61PS1
48PS1K/53PS1K/61PS1K
K
RM-892
3-9. G BOARD REMOVAL
2
G board
1
Five claws
3-10. J, B3, E, M, S BOARDS REMOVAL
6
Claw
7
B3 board
5
Shied case
4
Four screws
(+BVTT 3 x 8)
(+BVTT 3 x 8)
9
E board
8
Claw
0
Claw
!=
Claw
2
Claw
1
Hook
![
S board
3
J board
!-
M board
– 26 –
KP- 48PS1/53PS1/61PS1
48PS1K/53PS1K/61PS1K
K
RM-892
3-12. HIGH-VOLTAGE
CABLE REMOVAL
AND INSTALLATION
AND INSTALLATION
3-11. A BOARD REMOVAL
1
Screw
(+BVTP 3 x 12)
(+BVTP 3 x 12)
3
A board
2
Two claws
1
Rubber cap
2
HV cable
turn 90
turn 90
°
2
Rubber cap
1
HV cable
Hook
Gutter
(1) Removal
(2) Installation
Removing the arrow-marked screw is strictly inhibited.
If removed, it may cause liquid spill
If removed, it may cause liquid spill
1
Four screws
(+BVTP 4 x 16)
(+BVTP 4 x 16)
2
Lens
6
Four screws
(+BVTP 4 x 16)
(+BVTP 4 x 16)
7
Picture
tube
tube
5
Deflection
yoke
yoke
4
Neck
assembly
assembly
3
CR board
3-13. PICTURE TUBE REMOVAL
– 27 –
KP- 48PS1/53PS1/61PS1
48PS1K/53PS1K/61PS1K
K
RM-892
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
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.
can see the retrace line.
4. Next gradually turn it to the left to the position where the
retrace line disappears.
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
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.
CG board and CB board.
3. Adjust red, green and blue screen voltage to until retrace
line disappears with screen VR on the focus pack.
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
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.
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.
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
Scanning line visible.
4-3. FOCUS ROUGH ADJUSTMENT
1. Loose the lens screw.
2. Set in the service mode. (Refer to SECTION 6.)
3. Place the caps on the red and blue lens so that only the green
2. Set in the service mode. (Refer to SECTION 6.)
3. Place the caps on the red and blue lens so that only the green
color is shown.
4. Press “MENU” twice on the commander and select “Device
Register Setting”
b “Projector Engine”, press “6” three
times on the Commander to display the test signal (cross-
hatch) on the screen.
hatch) on the screen.
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 elec-
tric focus.
8. Fix lens screw.
– 28 –
KP- 48PS1/53PS1/61PS1
48PS1K/53PS1K/61PS1K
K
RM-892
4-5. 2-POLE MAGNET ADJUSTMENT
1. Receive the Dot signal.
2. Place the caps on the red and blue lens so that only the green
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Turn the green focus VR on the focus pack to the right and
set to over focus to enlarge the spot.
4. Now align the 2-Pole Magnet so that the enlarged spot is in
the center of the just focus spot.
(center of the dot doesn't move)
(center of the dot doesn't move)
5. Align the green focus VR and set for just (precise) focus.
6. Perform the same alignment for red and blue.
6. Perform the same alignment for red and blue.
Fig. 4-6
4-6.
4-POLE MAGNET ADJUSTMENT
1. Receive the Dot signal.
2. Place the caps on the red and blue lens so that only the green
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Turn the green focus VR on the focus pack to the left and set
to under focus to enlarge the spot.
4. Now align the 4-Pole Magnet so that the enlarged spot be-
comes a perfect circle.
5. Perform the same alignment for red and blue.
Fig. 4-7
4-7. GREEN, RED AND BLUE FOCUS
ADJUSTMENT
4-7-1. Green, Red and Blue Lens Focus Adjustment
1. Receive the Monoscope signal.
2. Place the caps on the red and blue lens so that only the green
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Rotate the green lens and adjust to obtain the best lens focus
at the center area.
4. Fix lens screw.
5. Repeat above process for red and blue.
5. Repeat above process for red and blue.
4-7-2. Green, Red and Blue Electrical Focus
Adjustment
1. Receive the Monoscope signal.
2. Place the caps on the red and blue lens so that only the green
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Rotate the green focus VR on the focus pack and adjust to
obtain the best electrical focus in the top right corner, taking
care of center forcus is not NG. obtain a compromise be-
tween center and corner focus.
care of center forcus is not NG. obtain a compromise be-
tween center and corner focus.
4. Repeat above process for red and blue.
Fig. 4-8
Adjust Point
Use the center dot
Use the center dot
OK
NG
NG
Adjust Point
Fig. 4-9
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