DOWNLOAD Sony KP-43T70K / KP-43T70T / KP-48VS70K / KP-53VS70K / KP-53VS70T Service Manual ↓ Size: 9.48 MB | Pages: 92 in PDF or view online for FREE

Model
KP-43T70K KP-43T70T KP-48VS70K KP-53VS70K KP-53VS70T
Pages
92
Size
9.48 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kp-43t70k-kp-43t70t-kp-48vs70k-kp-53vs70k-kp-53vs7.pdf
Date
PREV: Sony KP-53XBR300 / KP-61XBR300 (serv.man2) Service Manual

Sony KP-43T70K / KP-43T70T / KP-48VS70K / KP-53VS70K / KP-53VS70T Service Manual ▷ View online

– 24 –
KP-43T70K/43T70T/48VS70K/53VS70K/53VS70T
RM-Y906K
RM-Y906
RM-Y906K
RM-Y906K
RM-Y906
SECTION 2
DISASSEMBLY
2-1. REAR BOARD REMOVAL
2-3. SERVICE POSITION
2-2. CHASSIS ASSY REMOVAL
2-4. HA BOARD AND  HB BOARD REMOVAL
(EXCEPT KP-43T70K/43T70T)
2
 Rear board
1
 Nine screws (Except KP-43T70K/43T70T)
     Eight screws (KP-43T70K/43T70T)
     (Screw(4x20), tapping)
1
 Three screws
  (Screw(4x20),tapping)
2
 Chassis assy
1
 Disconnect CN203 
     on A board.
From CG board CN1304.
(The extension cable is not 
  supplied because of the
  countermeasure for radiation.)
G board
CN203
A board
2
 Covers
Cut them off with a plier or the like
from chassis assembly in case of 
checking printed circuit boards.
After checking, turn over the covers 
and secure them with screws.
Screws
(+BVTP3x12)
Chassis assembly      
8
 Three screws
   (+BVTP 3x12)
6
 Four screws
    (+BVTP 4x12)
2
 Two screws
   (+BVTP 4x12)
1
 Two screws
    (Screws (4x20), tapping)
9
 HB board
7
 HB bracket
Speaker grille assy
5
 HA board
3
 HA bracket
4
 Multi button
– 25 –
KP-43T70K/43T70T/48VS70K/53VS70K/53VS70T
RM-Y906K
RM-Y906
RM-Y906K
RM-Y906K
RM-Y906
2-6. MIRROR COVER REMOVAL
2-7. BEZNET ASSY REMOVAL
2-8. HC BOARD AND S BOARD REMOVAL
2-5. HA BOARD AND  HB BOARD REMOVAL
(KP-43T70K/43T70T)
7
 Three screws
   (+BVTP 3x12)
3
 Four screws
   (+BVTP 3x12)
5
 Three screws
   (+BVTP 3x12)
1
 Four screws
    (Screws (4x20), tapping)
8
 HB board
Panel ASSY, Control
6
 HA board
4
 HA bracket
2
1
 Seventeen screws
    (KP-43T70K/43T70T) 
     Twenty four screws 
     (KP-48VS70K)
     Nineteen screws 
     (KP-53VS70K/53VS70T)
     (Screw(4x20), tapping)
2
 Mirror cover
1
 Three screws 
    (KP-43T70K/43T70T/48VS70K)
     Five screws 
    (KP-53VS70K/53VS70T)
    (Screws(4x20), tapping)
2
 Eleven screws (KP-43T70K/43T70T)
     Twelbe screws (KP-48VS70K)
     Fifteen screws (KP-53VS70K/53VS70T)
     (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)
– 26 –
KP-43T70K/43T70T/48VS70K/53VS70K/53VS70T
RM-Y906K
RM-Y906
RM-Y906K
RM-Y906K
RM-Y906
2-9. A, G AND FA BOARDS REMOVAL
2-11.  HIGH-VOLTAGE CABLE INSTALLATION
AND REMOVAL
7
 Two screws
    (+BVTP 3x12)
!¡
 FA board
!º
 FA board bracket
4
 Eight screws
    (+BVTP 3x12)
6
 G board
9
 A board
3
 Terminal board
8
 Claw
5
 Claws
Main bracket
1
 Two screws
    (Screws (4x20), tapping)
2
 Seven screws
    (+BVTP 3x12)
2-10.
PICTURE TUBE REMOVAL
4
 Four screws
     (Screw(4x20), tapping)
!º
 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
– 27 –
KP-43T70K/43T70T/48VS70K/53VS70K/53VS70T
RM-Y906K
RM-Y906
RM-Y906K
RM-Y906K
RM-Y906
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
Page of 92
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