DOWNLOAD Sony KV-XA25M31 Service Manual ↓ Size: 5.64 MB | Pages: 127 in PDF or view online for FREE

Model
KV-XA25M31
Pages
127
Size
5.64 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-xa25m31.pdf
Date

Sony KV-XA25M31 Service Manual ▷ View online

 45 
KV
-XA25M61/XA25
M31/XA25M90/XA25M80/XA25M50
RM-954
KV
-XA25M87/XA25M84/XA25M86
RM-953
38
Additional Information
Remote control
1
2
3
4
5
6
7
8
0
-/--
9
FAVORITE
SOUND
MODE
SURROUND
PIP PROGR
PIP PROGR
ENTER
PIC MODE
The names/symbols of buttons
on the remote are indicated in
different colors to represent the
available functions.
Label color
White
Green
Yellow
Button function
For general TV
operations
For Teletext
operations
For PIP operations
Page
Button
Function
Overview of controls (continued)
?/1
PROGR +/–
0 – 9, -
2
 +/–
t
a
%
JUMP
Timer operations
PIC MODE
SOUND MODE
FAVORITE
PIP operations
V/v
(PIP PROGR +/–)
SURROUND
Stereo/bilingual operations
(not used for these models)
A/B
Teletext operations
(KV-XA25M86 only)
0 – 9
PROGR +/–
 
(red, green,
yellow, blue)
Menu operations
MENU
V/b/v/B
ENTER
Turn off temporarily or turn
on the TV.
Select program number.
Input numbers.
Adjust volume.
Select TV or video input.
Display the TV program.
Mute the sound.
Display on-screen information.
Jump to previous program number.
Set TV to turn on automatically.
Set TV to turn off automatically.
Select picture mode.
Select sound mode.
Display favorite channels.
Display a sub screen.
Swap main and sub screens.
Freeze the sub screen.
Select video input for the sub screen.
Change program number in the sub
screen.
Select surround mode.
Select stereo/bilingual mode.
Display Teletext broadcast.
Enlarge the Teletext display.
Reveal concealed information.
Stop Teletext page from scrolling.
Display Teletext service contents.
Show TV screen while waiting
for Teletext page.
Input Teletext page number.
Display the next or previous page.
Access a FASTEXT menu.
Display the menu.
Select and adjust item.
Confirm selected item.
10
10
10
11
11
11
11
11
11
12
12
13
13
14
15
16
16
16
16
17
18
19
19
19
19
19
19
19
19
22
22
22
– 46 –
KV
-XA25M61/XA25
M31/XA25M90/XA25M80/XA25M50
RM-954
KV
-XA25M87/XA25M84/XA25M86
RM-953
One screw
(+BVTP 3 
× 
12)
2-5. SERVICE POSITION
SECTION 2
DISASSEMBLY
2-1. REAR COVER REMOVAL
2-2. SPEAKER REMOVAL
2-3. CHASSIS ASSY REMOVAL
2-4. F BRACKET REMOVAL
2
 Two screws
     (+BVTP 3 
× 
12)
3
 F Board bracket
5
 Two claws
1
 Three connectors
4
 F board
Note:
1. Disconnect the speaker connection on the right side.
2. Undress necessary wires that creates tension while
placing the chassis into Service Position.
1
 Three screws
     (+BVTP 4 
× 
16)
2
 Eight screws
     (+BVTP 4 
× 
16)
3
 Rear Cover
1
 One screws (+BVTP 4 
×
 12)
     (KV-XA25M87 only)
     Two screws (+BVTP 4 
×
 12)
     (except KV-XA25M87)
     
2
 Two screws washer head
(+P 4 
×
 16)
2-6. REPLACEMENT OF PARTS
2-6-1. Light Guide
For replacement of light guide,unscrew
them, exchange with new parts and fix
them with screws respectively.
2-6-2. Power Button
1
 Push the claw to direction 
     of arrow and remove
2
 Spring compression
3
 Power Button
 47 
KV
-XA25M61/XA25
M31/XA25M90/XA25M80/XA25M50
RM-954
KV
-XA25M87/XA25M84/XA25M86
RM-953
2-7. HV CAP BLOCK, PWB HOLDER AND J
BOARD REMOVAL
     One screw
     (+BVTP 4x16)
     Four screws (+BVTP 3 
×
 12)
     (KV-XA25M87 only) 
     Two screws (+BVTP 3 
×
 12)
     (Except KV-XA25M87) 
     
6
 Terminal bracket
J Board 
(KV-XA25M84/XA25M86) 
4
5
2-8. TERMINAL BRACKET REMOVAL
     One screw
     (+BVTP 4x16)
     Four screws 
     (+BVTP 3 
×
 12)
     (KV-XA25M87 only) 
     Two screws 
     (+BVTP 3 
×
 12)
     (Except KV-XA25M87)
6
 Two claws          
5
 Terminal bracket
1
 J Board 
    (KV-XA25M84/XA25M86) 
3
4
     Two screws
     (+BVTP 3 
×
 12)
2
     
2-9. B1, P2 AND V1 BOARD REMOVAL
2
 V1 Board
One connector
1
 B1 Board
3
 P2 Board
     (KV-XA25M87/XA25M84/XA25M86)
(Except KV-XA25M87/
XA25M84/XA25M86)
(KV-XA25M61/XA25M31/XA25M86)
2-10. H BOARD REMOVAL
2
 Two connectors
3
 Two connectors
 One screw (+BVTAP 3 
×
 12)
1
 Two connectors
5
 Four claws
6
 H Board
2-11. A AND B BOARDS REMOVAL
3
 B Board  
5
 A Board
One screw
     (+BVTAP 3 
× 
12
 with washer)
2
 Five screws
     (+BVTAP 3 
× 
12)
4
 Four connectors
 48 
KV
-XA25M61/XA25
M31/XA25M90/XA25M80/XA25M50
RM-954
KV
-XA25M87/XA25M84/XA25M86
RM-953
2-12. PICTURE TUBE  REMOVAL
Note:
Please remove necessary CRT support located on top left, top right, prior to removing
the CRT.
 
 Four DGC clips
DGC
band
Demagnetic coil
Four claws
4
Two screws 
(washer head)
(+P 4 
× 
16)
1
Two screws
(Tapping 7+
Crown Washer)
3
Speaker
(15 
× 
6.5cm)
5
7
Speaker
(15 
× 
6.5cm)
Tension
spring
Chassis assy
Deflection
yoke
 
!∞
 Neck assy
C6 board
!™
Anode cap
Coating earth assy
!fi
Picture tube
!›
  Cushion
9
Two screws
(Tapping 7+
Crown Washer)
2
8
6
Two screws 
(washer head)
(+P 4 
× 
16)
@™
Holder DGC
Cuchion (50x550) DGC
Cushion (50x550) DGC
     One screw 
     (+BVTP 4 
×
 16)
     (KV-XA25M87 only) 
     Two screws 
     (+BVTP 4 
×
 16)
     (Except KV-XA25M87)
     Tweeter Sheet
     (KV-XA25M87 only) 
     Speaker
     (Except KV-XA25M87)
     Tweeter Sheet
     (KV-XA25M87 only) 
     Speaker
     (Except KV-XA25M87)
     One screw 
     (+BVTP 4 
× 
16)
     (KV-XA25M87 only) 
     Two screws 
     (+BVTP 4 
× 
16)
     (Except KV-XA25M87)
REMOVAL OF ANODE-CAP
NOTE : After removing the anode, short circuit the anode of the picture tube and
the anode cap to the metal chassis, CRT shield or carbon paint on the
CRT.
REMOVING PROCEDURES
1
Do not damage the surface of anode-caps with sharp shaped objects.
2
Do not press the rubber too hard so as not to damage the inside of anode-cap.
A metal fitting called the shatter-hook terminal is built into the rubber.
3
Do not turn the foot of rubber over too hard.
The shatter-hook terminal will stick out or damage the rubber.
HOW TO HANDLE AN ANODE-CAP
3
When one side of the rubber cap is separated from the anode button,  the anode-cap
can be removed by turning up the rubber cap and pulling it up in the direction of the
arrow 
c
.
2
Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow 
b
.
1
Turn up one side of the rubber cap in the direction indicated by the arrow 
a
.
a
a
b
b
c
 Anode Button
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