DOWNLOAD Sony KP-48V80 / KP-53V80 / KP-61V80 Service Manual ↓ Size: 10.79 MB | Pages: 105 in PDF or view online for FREE

Model
KP-48V80 KP-53V80 KP-61V80
Pages
105
Size
10.79 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kp-48v80-kp-53v80-kp-61v80.pdf
Date

Sony KP-48V80 / KP-53V80 / KP-61V80 Service Manual ▷ View online

– 37 –
KP-48V80/53V80/61V80
RM-Y905
RM-Y905
RM-Y905
2-5. MIRROR COVER REMOVAL
2-6. BEZNET ASSY REMOVAL
2-7. HC BOARD AND S BOARD REMOVAL
2-8. U BOARD AND TERMINAL BOARD REMOVAL
1
 Nineteen screws(KP-53V80) 
     Twenty three screws 
     (KP-61V80)
     Twenty four screws (KP-48V80)
     (Screw(4x20), tapping
2
 Mirror cover
1
 Five screws (KP-53V80/61V80)
     Three screws (KP-48V80)
    (Screws(4x20), tapping)
2
 Fourteen screws (KP-61V80)
     Fifteen screws (KP-53V80)
     Twelbe screws (KP-48V80)
     (Screws(4x20), tapping)
3
 Beznet assy
3
 HC board
2
 L screen holder
6
 Clows
7
 S board
Sensor 
bracket (B)
4
 Two screws
    (+BVTP 4x12)
1
 Two screws
    (+BVTP 4x12)
5
 Two screws
    (+BVTP 4x12)
Sensor 
bracket (A)
2
 Seven screws
    (+BVTP 3x12)
3
 Terminal board
4
 U board
1
 Two screws
    (Screws (4x20), tapping)
– 38 –
KP-48V80/53V80/61V80
RM-Y905
RM-Y905
RM-Y905
2-9. A BOARD AND G BOARD REMOVAL
2-11.  HIGH-VOLTAGE CABLE INSTALLATION
AND REMOVAL
4
 Two screws
    (+BVTP 3x12)
1
 Eight screws
    (+BVTP 3x12)
3
 G board
6
 A board
5
 Claw
2
 Claws
Main bracket
2-10.
PICTURE TUBE REMOVAL
4
 Four screws
     (Screw(4x20), tapping)
 Four screws
    (+BVTP 4x12)
 Picture tube
Picture tube
8
 Diflection yoke
9
 Tension
     spring
2
 Four screws
    (Screw(4x20), tapping)
3
1
 Four screws
    (Screw(4x20), tapping)
7
 Neck assy
6
 CR board
5
 Lens
Lens
CAUTION: Removing the arrow-marked
screws is strictly prohibited.
If removed, it may cause liquid spill.
(1) Remover
1
 Rubber cap
2
 HV cable
   turn 90
°
1
 HV cable
Gutter
Hook
(2) Installation
– 39 –
KP-48V80/53V80/61V80
RM-Y905
RM-Y905 RM-Y905
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 block 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.
10. Set VPNT 28 RON to “000”, 29 GON to “000” and 30 BON
to “001” to show only the blue color.
11. Adjust blue CRT lens just the same as green.
*
: Every time you press 6, the test signal changes to
“crosshatch+video signal” - “dots+video signal” -
“crosshach(black)” - “dots(black)” - off.
3-3. SCREEN (G2) ADJUSTMENT
1. Select VIDEO1 mode without signals.
2. Connect an oscilloscope to the TP701(KR), TP732(KG) and
TP761(KB) of CR board, CG board and CB board.
3. Adjust  R, G and B screen voltage to 170 – 173V with screen
VR on the Focus block.
3-4. FOCUS VR ADJUSTMENT
1. Set to the service mode.
2. Change TV mode to the video input mode.
3. Set to PJE, and press 6 to display the test signal (crosshatch)
on the screen.
4. Set VPNT 28 RON to “000”, 29 GON to “001” and 30 BON
to “000” to show only the green color.
5. Turn the green VR on the focus block to adjust to the optimum
focus point with the test signal.
6. Set VPNT 28 RON to “001”, 29 GON to “000” and 30 BON
to “000” to show the red color.
7. Turn the red VR on the focus block to adjust to the optimum
focus point with the test signal.
8. Set VPNT 28 RON to “000”, 29 GON to “000” and 30 BON
to “001” to show the blue color.
9. Turn the blue VR on the focus block to adjust to the optimum
focus point with the test signal.
R
G
B
SCREEN
R
G
B
FOCUS
FOCUS block
Fig. 3-1
170 – 173V
GND
pedestal level
Fig. 3-3
3-2. FOCUS LENS ADJUSTMENT
In this adjustment, use the remote commander in the
service mode.
For details of the usage of the service mode and the remote
commander, please refer the item 3-9. ELECTRICAL
ADJUSTMENT BY REMOTE COMMANDER.
1. Loosen the lens screw.
2. Set to the service mode.
3. Change TV mode to the video input mode.
4. Set to PJE, and press 6 to display the test signal (crosshatch)“
on the screen.
5. Set VPNT 28 RON to “000”, 29 GON to “001” and 30 BON
to “000” to show only the green color.
6. Turn the green lens to adjust to the optimum focus point with
the test signal.
7. Tighten the lens screw.
8. Set VPNT 28 RON to “001”, 29 GON to “000” and 30 BON
to “000” to show only the red color.
9. Adjust red CRT lens just the same as green.
SECTION 3
SET-UP ADJUSTMENTS
Fig. 3-5
Fig. 3-4
A
B
Lens
Minimize both A and B.
Center of crosshatch
Scanning line visible.
Fig. 3-2
Test signal
– 40 –
KP-48V80/53V80/61V80
RM-Y905
RM-Y905 RM-Y905
3-5. DEFLECTION YOKE TILT  ADJUSTMENT
1. Receive the Monoscope signal.
2. Set in service mode.
3. Set VPNT 29 GON to “001” 28 RON to “000” and 30 BON to
“000” to show only the green color.
4. 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.
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 is aligned  in the mode
VPNT 28 RON “001”,  29 GON “000”, 30 BON “000” on the
service mode menu, and the tilt of the deflection yoke for biue
is aligned with in the mode VPNT 28 RON “000”,  29 GON
“000”, 30 BON “001” on the service menu, is aligned the
same as was done for green.
3-7. 4-POLE MAGNET ADJUSTMENT
1. Receive the Dot signal.
2. Set in service mode.
3. Set VPNT 29 GON to “001” 28 RON to “000” and 30 BON to
“000” to show only the green color.
4. Turn the green VR on the focus block to the left and set to
underfocus to enlarge the spot.
5. Now align the 4-Pole Magnet so that the enlarged spot
becomes a perfect circle for green and red.
6. Perform the same alignment for blue.
3-8. DEFOCUS ADJUSTMENT (BLUE)
1. Select the video menu and set the mode to “Vivid” mode.
2. Set to the service mode.
3. Change TV mode to the video input mode.
4. Set to PJE, and press 6 to display the test signal (dots) on the
screen.
5. Turn the blue VR on the focus block to adjust to the diameter
of the dots as shown in the figure below.
Fig. 3-6
2-pole magnet
4-pole magnet
Deflection yoke
Anode cap
3-6. 2-POLE MAGNET ADJUSTMENT
(GREEN,RED)
1. Receive the Dot signal.
2. Set in service mode.
3. Set VPNT 29 GON to “001” 28 RON to “000” and 30 BON to
“000” to show only the green color.
4. Turn the green VR on the focus block to the right and set to
overfocus to enlarge the spot.
5. Now align the 2-Pole Magnet so that the enlarged spot is in the
center of the Just Focus spot.
6. Align the green focus VR and set for just (precise) focus.
7. Perform the same alignment for red.
Use the center dot
Fig. 3-7
Fig. 3-8
[Focus adjustment point]
/
x
y
x : y = 1:1.5 (BIue)
x : y = 1:1 (Green, Red)
Use the center dot
Lmm Max
Inch
L
48"
7
53"
8
61"
9
Fig. 3-9
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