Sony KV-XG25M50 Service Manual

SERVICE MANUAL
CHASSIS
MODEL COMMANDER DEST. CHASSIS NO.
KV-XG25M50 RM-952 Malaysia SCC-U45D-A
MODEL COMMANDER DEST. CHASSIS NO.
3
1
2
6
4
5
9
7
8
JUMP
-
0
2
SOUND
PROGR
MODE
FAVORITE
TV
TRINITRON
®
COLOR TV
KV-XG25M50
RM-952
Power requirements 220-240 V AC, 50/60 Hz
Power consumption (W) Indicated on the rear of the TV
Television system B/G, I, D/K, M
Color system PAL, PAL 60, SECAM, NTSC4.43, NTSC3.58
Channel coverage
B/G VHF: E2 to E12 / UHF: E21 to E69 / CATV: S01 to S03, S1 to S41
I UHF: B21 to B68 / CATV: S01 to S03, S1 to S41
D/K VHF: C1 to C12, R1 to R12 / UHF: C13 to C57, R21 to R60
M VHF: A2 to A13 / UHF: A14 to A79 /
˘˘
˘ (Antenna) 75-ohm external terminal
˘˘
Audio output 5W + 5W
Number of terminal
D (Video) Input: 3* Output: 1 Phono jacks; 1 VP-P, 75 ohms * Two input lines available Audio Input: 3* Output: 1 Phono jacks; 500 mVrms * Two input lines available 2 (Headphone) Output: 1 Stereo Minijack
Picture tube 25 inch
Tube size (cm) 64 Measured diagonally
Screen size (cm) 60 Measured diagonally
Dimension (w/h/d, mm) 722 × 515 × 512
Mass (kg) 38
SPECIFICATIONS
Note
CATV: S01 to S03, S1 to S41, Z1 to Z39
CATV: A-8 to A-2, A to W+4, W+6 to W+84
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.
Design and specifications are subject to change without notice.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
2
TABLE OF CONTENTS
KV-XG25M50
RM-952
Section Title Page
SELF DIAGNOSIS FUNCTION................................ 4
1. GENERAL ........................................................................ 8
2. DISASSEMBLY
2-1. Rear Cover Removal ................................................ 21
2-2. Speaker Removal ..................................................... 21
2-3. Chassis Assy Removal ............................................. 21
2-4. Service Position ....................................................... 21
2-5. Replacement of Parts ............................................... 21
2-5-1. Replacement of Control Button ..................................... 21
2-5-2. Replacement of Light Guide .......................................... 21
2-6. Terminal Bracket Removal ...................................... 22
2-7. H2 Board Removal .................................................. 22
2-8. A and B6 Boards Removal ...................................... 22
2-9. Picture Tube Removal .............................................. 23
2-10. Removal of Anode Cap............................................ 23
3. SET-UP ADJUSTMENTS
3-1. Beam Landing .......................................................... 24
3-2. Convergence ............................................................. 25
3-3. Focus Adjustment .................................................... 27
3-4. G2 (Screen) and White Balance Adjustments......... 28
Section Title Page
5. DIAGRAMS
5-1. Block Diagram ......................................................... 37
5-2. Circuit Boards Location .......................................... 39
5-3. Schematic Diagrams ................................................ 40
(1) Schematic Diagram of B6 Boards ........................... 41
(2) Schematic Diagrams of A Board ............................. 43
(3) Schematic Diagram of H2 Board ............................... 59
(4) Schematic Diagrams of C6 Board ........................... 61
(5) Schematic Diagram of VM1 Board ......................... 63
5-4. Voltage Measurements ............................................ 64
5-5. Waveforms ............................................................... 68
5-6. Printed Wiring Boards and Parts Location .............. 69
5-7. Semiconductors ........................................................ 74
6. EXPLODED VIEWS
6-1. Picture Tube ............................................................. 77
6-2. Chassis ..................................................................... 78
7. ELECTRICAL PARTS LIST....................................... 79
4. CIRCUIT ADJUSTMENT
4-1. Adjustments with Commander ................................ 29
4-2. Adjustment Method ................................................. 30
4-3. Picture Quality Adjustments.................................... 35
4-4. Deflection Adjustment ............................................. 00
4-5. H-Trapezoid Adjustment ......................................... 00
4-6. A Board Adjustment After IC003 (Memory)
Replacement ............................................................. 35
4-7. Picture Distortion Adjustment ................................. 36
3
KV-XG25M50
RM-952
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically begin to flash. The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.
1. DIAGNOSTIC TEST INDICATORS
When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the lamp will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a “0”.
SELF DIAGNOSTIC FUNCTION
Diagnostic
Item
Description
Power does not turn on
+B overcurrent (OCP) or overvoltage (OVP)
Vertical deflection stopped
Horizontal deflection overdrive
White balance failure (no PICTURE)
Micro reset
No. of times
STANDBY/TIMER
lamp flashes
Does not light
2 times
5 times
Self-diagnostic
display/Diagnostic
result
002:000 or 002:001~255 003:001~255 004:001~255
at the same time
005:000 or 005:001~225
101:00 or
101:001~225
Probable
Cause
Location
Power cord is not plugged in.
Fuse is burned out F8601 (B6)
H.OUT Q511 is shorted. (A board)
IC1800 is shorted. (C6 board)
-13V is not supplied. (A board)
IC 503 faulty (A board)
G2 is improperly adjusted.
(Note 2)
CRT problem.
Video OUT is faulty. (C6
board)
IC301 is faulty. (A board)
No connection A board to
C6 board.
Discharge CRT (C6 Board)
Static discharge
External noise
Detected
Symptoms
Power does not come on.
No power is supplied to the
TV.
AC power supply is faulty.
Power does not come on.
Load on power line is
shorted.
Has entered standby state after horizontal raster.
Vertical deflection pulse is stopped.
Power line is shorted or power supply is stopped.
No raster is generated.
CRT cathode current
detection reference pulse output is small.
Power is shut down shortly, after this return back to normal.
Detect Micro latch up.
Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.
The symptom that is diagnosed first by the microcontroller is displayed on the screen.
Note 2: Refer to screen (G2) Adjustment in section 3-4 of this manual.
– 4 –
2. DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT
2 times
5 times
KV-XG25M50
RM-952
Lamp ON 0.3 sec.
Lamp OFF 0.3 sec.
Lamp OFF 3 sec.
STANDBY/SLEEP lamp
Diagnostic Item Flash Count* +B overcurrent/overvoltage 2 times Vertical deflection stopped
White balance failure 5 times
* One flash count is not used for self-diagnostic.
3. STOPPING THE STANDBY/TIMER FLASH
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER lamp from flashing.
– 5 –
KV-XG25M50
RM-952
4. SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as power sometimes shuts off or screen sometimes goes out that cannot be confirmed, it is possible to bring up past occurances of failure for confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
[Screendisplay] / channel [5] / Sound volume [-] / Power ON
Self-Diagnosis screen display
˘
Note that this differs from entering the service mode (mode volume [+]).
SELF DIAGNOSTIC
002 : 000 003 : 000 004 : 000 005 : 001
101 : 000
Numeral "0" means that no fault has been detected.
Numeral "1" means a fault has been detected.
5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you have completed the repairs, clear the result display to “0”.
Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after completion of the repairs.
[Clearing the result display]
To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the diagnostic screen is being displayed.
Channel [8] / 0
[Quitting Self-diagnostic screen]
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
– 6 –
6. SELF-DIAGNOSTIC CIRCUIT
KV-XG25M50
RM-952
FROM
CRT
FROM
[+B] Q604 C6
[V] Q509/507
IC301
Y/CHROMA JUNGLE
IK-IN
MP/
18 51
PROTECT
SDA
4635
IC001
SYSTEM
IO-8DAT
O-LED
IO-SDAT
MEMORY
B-DAT
54521
IC003
[+BovercurrentªOCPº] Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to ON
and the voltage to pin 18 of IC301 should go down when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.
[Verticaldeflectionstopped] Occurs when an absence of the vertical deflection pulse is detected by Q509 and IC001
shut down the power supply.
[Verticaldeflectionovercurrent] Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be
shut down when detect this by IC001.
[Whitebalancefailure] If the RGB levels* do not balance or become low level within 5 seconds, this error will be
detected by IC301. TV will stay on, but there will be no picture.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)
– 7 –
The operating instruction mentioned here are partial abstracts
2
WARNING
• Dangerously high voltages are present inside the TV.
• Operate the TV only between 220 – 240 V AC.
To prevent fire or shock hazard, do not expose the TV to rain or moisture.
Do not operate the TV if any liquid or solid object falls into it. Have it checked immediately by qualified personnel only.
Do not open the cabinet and the rear cover of the TV as high voltages and other hazards are present inside the TV. Refer servicing and disposal of the TV to qualified personnel.
Your TV is recommended for home use only. Do not use the TV in any vehicle or where it may be subject to excessive dust, heat, moisture or vibrations.
Do not block the ventilation openings of the TV. Do not install the TV in a confined space, such as a bookcase or built-in cabinet.
For children’s safety, do not leave children alone with the TV. Do not allow children to climb onto it.
Do not plug in too many appliances to the same power socket. Do not damage the power cord.
Clean the TV with a dry and soft cloth. Do not use benzine, thinner, or any other chemicals to clean the TV. Do not scratch the picture tube.
For your own safety, do not touch any part of the TV, the power cord and the antenna cable during lightning storms.
Pull the power cord out by the plug. Do not pull the power cord itself. Disconnect the TV before moving it or if you are not going to use it for several days.
3
GB
Using Your New TV
Do not install the TV in an unstable position. Use a proper TV stand.
Do not place any objects on the TV.
WARNING (continued)
from the Operating Instruction Manual. The page numbers of the Operating Instruction Manual remain as in the manual.
KV-XG25M50
RM-952
SECTION 1
GENERAL
8
Using Your New TV
4
Using Your New TV
Getting Started
Step 1
Connect the antenna
If you wish to connect a VCR, see the Connecting a VCR diagram below.
Using Your New TV
IEC connector (not supplied)
Rear of TV
Connecting a VCR
To watch the video input, press t (see page 13).
: Signal flow
or
Antenna cable (not supplied)
Antenna cable (not supplied)
(yellow)
-L (MONO)(white)
-R (red)
To video and audio outputs
Audio/Video cable (not supplied)
To 8 (antenna)
To antenna output
: Signal flow
VCR
To
t
1 or 2 (video input)
Rear of TV
VIDEO
VIDEO IN
VIDEO OUT
AUDIO
RL
Using Your New TV
5
Using Your New TV
Step 2
Note
Do not use old batteries nor use different types of batteries together.
Front of TV
Notes
If you connect a monaural VCR, connect the yellow plug to
(the
yellow jack) and the black plug to
-L (MONO) (the white jack).
If you connect a VCR to the 8 (antenna) terminal, preset the signal
output from the VCR to the program number 0 on the TV.
When no signal is input from the connected video equipment, the TV screen becomes blue.
KV-XG29M61/XG29M50/XG25M50 only
Do not connect video equipment to the t 2 (video input) jacks at the front and the rear of your TV at the same time; otherwise the picture will not be displayed properly on the screen.
CAUTION
Do not connect the power cord until you have completed making all other connections; otherwise a minimum leakage current might flow through the antenna and other terminals to ground.
To avoid battery leakage and damage to the remote, remove the batteries from the remote if you are not going to use it for several days. If any liquid that leaks from the batteries touches you, immediately wash it away with water.
Insert the batteries into the remote
Step 3
Preset the channels automatically
Tips
If you want to stop automatic channel presetting, press SELECT twice.
If your TV has preset an unwanted channel or cannot preset a particular
channel, then preset your TV manually (see page 10).
Note
• During automatic channel presetting, your TV screen will indicate “B/G” , “I”, “D/K” or “M” for the TV system.
AUTO
PROGR
1
1
VHF LOW AUTO
1
2
2
L(MONO) R
PROGR
SELECT
AUTO
PROGR
!
9
KV-XG25M50
RM-952
Using Your New TV
6
Connecting optional components
You can connect optional audio/video components, such as a VCR, multi disc player, camcorder, video game or stereo system.
To watch the video input of the connected equipment, press t (see page 13).
Connecting a camcorder/video game equipment using the t (video input) jacks
Notes
KV-XA21M61/XA21M50 only
You can also connect video equipment to the t 1 (video input) jack at
the rear of your TV.
KV-XG29M61/XG29M50/XG25M50 only
You can also connect video equipment to the t 1 or 2 (video input) jacks
at the rear of your TV.
Do not connect video equipment to the t 2 (video input) jacks at the
front and the rear of your TV at the same time; otherwise the picture will not be displayed properly on the screen.
Connecting audio/video equipment using the T (monitor output) jacks
Front of TV
Camcorder
Video game equipment
To video and audio outputs
: Signal flow
To
t
2
(video input)
or
Audio/Video cable (not supplied)
(yellow)
-L (MONO)
(white)
-R (red)
Rear of TV
To antenna output
To video and audio inputs
or
Audio system
To audio inputs
VCR
: Signal flow
Antenna cable (not supplied)
Audio/Video cable (not supplied)
2
L
(
MONO
)
R
2
L(MONO) R
PROGR
SELECT
AUTO PROGR
To T (monitor output)
Using Your New TV
8
Securing the TV
To prevent the TV from falling, secure the TV using one of the following methods:
A
With the supplied screws, attach the band to the TV stand and to the rear of the TV using the provided hole.
or
B
Put the cord or chain through the clamps to secure the TV against a wall or pillar.
Note
Use only the supplied screws. Use of other screws may damage the TV.
20 mm
3.8 mm
or
A
B
10
KV-XG25M50
RM-952
Using Your New TV
Using Your New TV
9
Presetting channels
You can preset up to 100 TV channels in numerical sequence from program number 1 using the remote and the buttons on your TV as well.
Presetting channels automatically
1
Press ! to turn on the TV.
2
Press AUTO PROGR.
Note
During automatic channel presetting, your TV screen will indicate
B/G” ,
I”, “D/K or M for the TV system.
To preset channels automatically from a specified program number
(1) Press SELECT until
AUT
O PROGRAM appears.
(2) Press + or –.
The on-screen display will start flashing.
(3) Press PROGR +/– or the number buttons until the desired program number
appears.
(4) Press + or –.
2
L(MONO) R
PROGR
SELECT
AUTO PROGR
AUTO
PROGR
!
continued
TV
1
2
3
4
6
7
8
9
0
5
JUMP
SOUND
MODE
FAVORITE
PROGR
-
2
VHF
LOW
AUTO
!
Number buttons
~/1
SELECT
2 +/–
PROGR +/–
+ or –
PIC MODE
Using Your New TV
10
Presetting channels manually
1
Press SELECT until “MANUAL PROGRAM” appears.
2
Press + or –.
3
Press PROGR +/– or the number buttons until the desired program number appears.
4
Press + or – until the desired channel picture appears.
5
Press SELECT.
Note
If you preset a locked program number, that particular program number will be unlock automatically (see page 19).
To change the TV system setting
If the picture or sound is abnormal when receiving programs through the 8 (antenna) terminal
(1) Press SELECT until
TV SYS appears.
(2) Press + or – to select the appropriate
TV system until the picture or sound quality is optimal.
or
Presetting channels (continued)
MANUAL PROGRAM
SELECT
VHF
LOW
B/G
1
2
3
4
5
6
7
8
0
-/--
9
PROGR
SELECT
1
B/G
I D/K
M
TV SYS: B/G
11
KV-XG25M50
RM-952
KV-XG25M50
Using Your New TV
Using Your New TV
11
To change the color system setting
If the color is abnormal when receiving programs through the 8 (antenna) terminal or the t (video input) jack.
(1) Press SELECT until
COLOR SYS appears.
(2) Press + or – to select the appropriate
color system until the color is optimal.
Tip
Normally set COLOR SYS to AUT
O.
Skipping program numbers
1
Press PROGR +/
– or the number buttons until the unused or unwanted
program number appears.
2
Press SELECT until
MANUAL PROGRAM
appears.
3
Press + or –.
4
Press PIC MODE.
5
Press SELECT.
To restore the skipped program number again
Preset the channel automatically or manually.
Tip
You can also use SELECT and 2 +/– on the TV to preset channels and
skip program numbers.
To use the fine tuning (FINE) function
The fine tuning (FINE) function may help to reduce the following problems: incomplete Teletext display (KV-XG29M61/XA21M61 only), double images and lines moving across the TV screen.
You can use the fine tuning function as below:
(1) Select the program number you want to adjust. (2) Press SELECT until
MANUAL
PROGRAM appears on the screen. (3) Press + or – on the remote control once. (4) Press
to display “FINE” on the scr
een.
(5) Press + or – continuously until the above problems are minimized.
The + or – icon on the screen flashes while tuning.
(6) Press SELECT to return to normal screen.
COLOR SYS: AUTO
AUTO
PAL SECAM
NTSC 3.58NTSC 4.43
Using Your New TV
12
Watching the TV
This section explains functions used while watching the TV. Most operations can be done using the remote.
1
Press ! to turn on the TV.
When the TV is in the standby mode (the 1 indicator on the TV is lit red), press
?/
1 on the
remote or PROGR +/
– on
the TV.
2
Press PROGR +/
– or the number buttons to select the program number.
For double digit numbers, press -, then the number (e.g., for 25, press -, then 2 and 5).
3
Press 2 +/– to adjust the volume.
or
1
indicator
%
?/
1
t a
Number buttons
SELECT
2
+/–
PROGR +/–
+ or –
JUMP
2
L(MONO) R
PROGR
SELECT
AUTO PROGR
PROGR
SELECT
AUTO
PROGR
!
TV
1
2
3
4
6
7
8
9
-
0
5
JUMP
SOUND
MODE
FAVORITE
PROGR
2
1
2
3
4
5
6
7
8
0
-/--
9
PROGR
!
RM-952
12
Using Your New TV
Using Your New TV
13
To
Turn off temporarily
Turn off completely
Mute the sound
Watch the video input (VCR, camcorder, etc.)
Jump back to the previous program number
Display the on-screen information*
Adjust the volume of all program numbers automatically
Adjust the picture position when it is not aligned to the TV screen
Additional tasks
* The picture, sound, and either the program number or video input are
displayed. The on-screen display for the picture and sound information disappears after about three seconds.
Changing the on-screen display language
1
Press SELECT until LANGUAGE /
: ENGLISHappears on the screen.
2
Press + or to select
“.
Tip
You can also use SELECT and 2 +/– on the TV to select the on-screen
display language.
PIC ROTATION
LANGUAGE / : ENGLISH
SELECT
/ LANGUAGE:
continued
Press
?/
1. The 1 indicator on the TV lights up red.
! on the TV.
%.
t to select “VIDEO 1 or VIDEO 2. To return to the TV program, press a.
JUMP.
.
SELECT repeatedly until
INTELLIGENT VOL
appears, then press + or – to select “ON”. To cancel, select “OFF”.
SELECT repeatedly until
PIC ROT
ATION appears, then press + or – to adjust the alignment of the picture position.
The
+
or
icon on the screen flashes while adjusting.
Using Your New TV
14
Setting the Wake Up timer
1
Press
until the desired
period of time appears.
The Wake Up timer starts immediately after you have set it.
2
Select the program number or video input you want to display when you wake up.
3
Press ?/1 or set the Sleep timer if you want the TV to turn off automatically.
The
indicator on the TV lights up orange.
To cancel the Wake Up timer
Press
until WAKE UP TIMER: OFF appears or turn off the TV’s
main power.
Note
If no buttons or controls are pressed for more than two hours after the TV is turned on using the Wake Up timer, the TV automatically goes into the standby mode. To continue watching the TV, press any button or control on the TV or the remote.
Setting the Sleep timer
Press
until the desired
period of time appears.
The Sleep timer starts immediately after you have set it.
To cancel the Sleep timer
Press
until SLEEP TIMER: OFF appears or turn the TV off.
WAKE UP TIMER:10M
WAKE UP TIMER:OFF
WAKE UP TIMER:12H00M
After 10 minutes
No Wake Up timer After 12 hours
SLEEP TIMER:30M
SLEEP TIMER:60M
SLEEP TIMER:OFF
SLEEP TIMER:90M
After 30 minutes
No Sleep Timer
After 60 minutes
After 90 minutes
Watching the TV (continued)
13
KV-XG25M50
RM-952
Advanced Operations
15
Customizing the picture and sound
You can customize the picture and sound by selecting the picture and sound modes or by adjusting its settings.
You can change the sound effect by selecting the surround mode.
Selecting the picture and sound modes
To select the picture mode
Press PIC MODE repeatedly until you get the desired picture mode.
Select To
DYNAMIC receive high contrast pictures.
STANDARD receive normal contrast pictures.
SOFT receive mild pictures.
To select the sound mode
Press SOUND MODE repeatedly until you get the desired sound mode.
Select To
DYNAMIC listen to dynamic and clear sound that emphasizes the low and
high sound.
DRAMA listen to sound that emphasizes vocals and background music.
SOFT receive soft sound.
Advanced Operations
TV
SOUND
MODE
FAVORITE
PROGR
2
STANDARDDYNAMIC
SOFT
PIC MODE
DYNAMIC
DRAMA
SOFT
SOUND
MODE
Advanced Operations
SOUND MODE
PIC MODE
SELECT + or –
continued
Advanced Operations
16
Adjusting the picture and sound settings
1
Press SELECT until the desired setting appears.
Each time you press SELECT, the setting item will change as follows:
2
Press + or – to adjust the item.
3
To adjust other items, repeat steps 1 to 2.
* HUE can be adjusted for the NTSC system only.
Notes
When you select a picture or sound mode, the adjusted settings will be reset according to the selected mode.
You can also use SELECT and 2 +/– on the TV to adjust the picture and sound settings.
SELECT
PICTURE 60
PICTURE COLOR
BRIGHT
HUE*
BALANCE TREBLE
BASS
SHARP
Customizing the picture and sound (continued)
14
KV-XG25M50
RM-952
Advanced Operations
17
Selecting the surround mode
1
Press SELECT repeatedly until SURROUND appears.
2
Press + or – to select the desired surround sound.
Select To
MOVIE listen to sound that spreads out over a large area, giving the feeling
of being at a movie theatre.
MUSIC listen to the sound that gives the feeling of being at a live concert.
OFF turn off the surround sound.
SURROUND: MOVIE
SELECT
MUSICMOVIE
OFF
KV-XA21M61/XA21M50
1
Press SELECT repeatedly until SURROUND appears.
2
Press + or – to select “ON”.
To turn off the surround mode, select “OFF” .
SURROUND: ON
SELECT
ON
OFF
Advanced Operations
18
Viewing your favorite channels
You can display six of your favorite channels for quick and easy selection. You can program the favorite channel as well.
Selecting a favorite channel
1
Press FAVORITE.
2
Press the number button from 1 to 6 to select the desired favorite channel.
When you use the
F
AVORITE CH
feature for the first time, six preset channels will appear.
1
2
3
4
6
7
8
9
0
5
JUMP
SOUND
MODE
FAVORITE
PROGR
-
2
FAVORITE
+ or –
PROGR +/–
Number buttons
Programming the favorite channel
1
Press PROGR +/
– or number buttons to select the program number you want to program (e.g., program number 8).
2
Press SELECT until
FAVORITE CH SETUP
appears.
3
Press + or – to select the favorite channel you want to program (e.g., 3).
4
Press SELECT.
The selected favorite channel (e.g., 3) turns red for about one second.
5
To program other favorite channels, repeat steps 1 to 4.
or
FAVORITE
FAVORITE CH
1PR01 2 PR02 3 PR03 4PR04 5 PR05 6 PR06
1
2
3
4
5
6
1
1
2
3
4
5
6
7
8
0
-/--
9
PROGR
8
FAVORITE CH SETUP :
SELECT
FAVORITE CH SETUP :
SELECT
– 15 –
KV-XG25M50
RM-952
Advanced Operations
19
Blocking the channels (CHILD LOCK)
You can lock some program numbers to prevent children from watching certain channels, by using the buttons on the remote control.
1
Select the program number you want to lock.
2
Press SELECT until
CHILD LOCK appears on the screen.
3
Press + or – to select “ON”.
The
symbol appears on
the screen.
To cancel, press + or – to select OFF. The symbol disappears from the screen.
Note
If you preset a locked program number, that particular program number will be unlocked automatically (see page 9).
CHILD LOCK: ON
1
CHILD LOCK: OFF
SELECT
TV
1
2
3
4
6
7
8
9
0
5
JUMP
SOUND
MODE
FAVORITE
PROGR
-
2
SELECT
+ or –
16
KV-XG25M50
RM-952
Additional Information
24
Troubleshooting Shortcuts
For better viewing, please check the following connections.
Snowy Distorted Noisy/ picture picture distorted
sound
Wall antenna terminal
UHF
VHF
Booster
VCR
Check the antenna direction.
Incorrect antenna direction may cause:
Check the antenna type.
Wrong type of antenna may cause:
No picture
Snowy picture
Check connection on the wall antenna terminal.
Loose connection may cause:
Snowy picture
Distorted sound
Check if you need booster to increase signal level.
Too strong signal level may cause:
Distorted picture
Noisy sound
Antenna connection
Additional Information
Additional Information
25
P166 SECTEXT 166 FR1 MAR 03:59:09
Fom Singapore
To PARIS
To OSAKA
To ROMA
To SYDNEY
Day Dep/Arr Flight Alrcraft
1.6 220/0588 SQ28 747 2 2130/1225 PA115 L15 3 2115/1330 SQ26 747
2.7 2130/0745 SQ24
747
4 2300/0915 AZ487 747
2.5 1000/1715 SQ6 747
4.6 0930/2015 CX522 L10
1 2210/0610 SQ21A 747 2 2100/0835 SQ21A 747
Check connection on the VCR and on the TV.
Loose connection may cause:
Snowy picture
Distorted sound
No picture
For more information, please see Troubleshooting on page 26 or consult your dealer for guidance.
AC Connection
Check connection on the AC socket.
Loose connection may cause:
no power
no picture with no sound
Additional Information
Connection
to TV
Double image Missing picture Teletext
characters
(KV-XG29M61/ XA21M61 only)
17
KV-XG25M50
RM-952
Additional Information
26
Check the antenna cable and connection on the TV, VCR and on the wall.
Press SELECT until
MANUAL
PROGRAM appears on the screen, then preset the channel again.
Check the antenna type (VHF/UHF). Contact a Sony dealer for advice.
Adjust the antenna direction. Contact a Sony dealer for advice.
Try using a booster.
Turn off or disconnect the booster if it is
in use.
If the sound of all the channels are noisy, check the TV system (TV SYS) setting, then press AUTO PROGR to preset the channels again.
If the sound of some channels are noisy, select the channel, then select the appropriate TV system (TV SYS).
If the sound of some channels are noisy, select the channel, then press A/B to select the main sound (KV-XG29M61/XA21M61 only).
Check the power cord, antenna and the VCR connections.
Press ?/1 (power).
Press ! (main power) on the TV to turn
off the TV for about five seconds, then turn it on again.
Snowy picture
Noisy sound
Distorted picture
Noisy sound
Good picture
Noisy sound
No picture
No sound
Troubleshooting
If you find any problem while viewing your TV, please check the following guide. If any problem persists, contact your Sony dealer.
Possible causeSymptom
Solutions
Connection is loose or the cable is damaged.
Channel presetting is inappropriate or incomplete.
The antenna type is inappropriate.
The antenna direction is inappropriate.
Signal transmission is low.
Broadcast signals are too strong.
The TV system setting or channel presetting is inappropriate or incomplete.
The selected sound is inappropriate.
The power cord, antenna or VCR is not connected.
The TV is not turned on.
Page
4
10
9
10
20
4
13
12
Additional Information
27
Good picture
No sound
Dotted lines or stripes
Double images or ghosts
No color
Abnormal color patches
TV cannot receive stereo broadcast signal (Not used for this models)
Press 2 + to increase the volume level.
Press % to cancel the muting.
Press A/B until a better sound is heard
(KV-XG29M61/XA21M61 only).
Do not use a hair dryer or other equipment near the TV.
Adjust the antenna direction for minimum interference. Contact a Sony dealer for advice.
Use a highly directional antenna.
Use the fine tuning (FINE) function.
Adjust the antenna direction. Contact a
Sony dealer for advice.
Turn off or disconnect the booster if it is in use.
Press SELECT until
COLOR appears
on the screen, then press + or – to adjust the color level.
Press SELECT until
COLOR SYS
appears on the screen, then check the color system setting (usually set this to
AUTO”).
Adjust the antenna direction. Contact a
Sony dealer for advice.
Keep external speakers or other electrical equipment away from the TV. Do not move the TV while the TV is turned on. Press ! (main power) on the TV to turn off the TV for about five minutes, then turn it on again.
Press A/B until AUTO appears on the screen.
Possible cause
Symptom
Solutions
continued
The volume level is too low.
The sound is muted.
Broadcast signal has a
transmission problem.
There is local interference from cars, neon signs, hair dryers, power generators, etc.
Broadcast signals are reflected by nearby mountains or buildings.
The antenna direction is inappropriate.
Use of a booster is inappropriate.
The color level setting is too low.
The color system setting is inappropriate.
The antenna direction is inappropriate.
The magnetic disturbance from external speakers or other equipment, or the direction of the earths magnetic field may affect the TV.
The stereo reception setting is inappropriate.
12
13
20
11
16
11
20
Page
18
KV-XG25M50
RM-952
Additional Information
28
4
20
22
4
11
13
11
29
Stereo broadcast sound switches on and off or is distorted.
or
The sound switches between monaural and stereo frequently. (Not used for this models)
100 appears on the top of the screen and there is no Teletext display. (Not used for this models)
Teletext display is incomplete (snowy picture or double images). (Not used for this models)
Picture slant
Lines moving across the TV screen.
The 1 indicator on your TV flashes red a number of times between 3-second intervals.
TV cabinet creaks.
A boom sound is heard when the TV is turned on.
Troubleshooting (continued)
Possible causeSymptom Solutions
Connection is loose or
the cable is damaged.
The antenna direction
is inappropriate.
Broadcast signal has a
transmission problem.
The channel carries no
Teletext broadcast.
Connection is loose or
the cable is damaged.
The antenna direction
is inappropriate.
Signal transmission is
too low.
The magnetic
disturbance from external speakers or other equipment, or the direction of the earths magnetic field may affect the TV.
There is interference
from external sources, e.g., heavy machineries, nearby broadcast station.
Your TV may need
service.
Changes in room
temperature sometimes make the TV cabinet expand or contract, making a noise. This does not indicate a malfunction.
The TVs demagnetizing
function is working. This does not indicate a malfunction.
Page
Check the antenna cable and connection on the TV, VCR and on the wall.
Adjust the antenna direction. Contact a Sony dealer for advice.
Press A/B until a better sound is heard.
Check the antenna cable and connection
on the TV, VCR, and at the wall.
Adjust the antenna direction. Contact a Sony dealer for advice.
Try using a booster.
Use the fine tuning (FINE) function.
Keep external speakers or other electrical
equipment away from the TV.
Press SELECT until
PIC ROT
ATION appears on the screen, then press + or – to align the picture to the TV screen.
Use the fine tuning (FINE) function.
Contact your nearest Sony service center.
Additional Information
29
2
L(MONO) R
PROGR
SELECT
AUTO PROGR
!
Self-diagnosis function
Your TV is equipped with a self-diagnosis function. If there is a problem with your TV, the 1 indicator flashes red. The number of times the 1 indicator flashes indicates the possible causes.
1
Check that the 1 indicator flashes red a number of times between 3-second intervals.
2
Count the number of times the 1 indicator flashes.
3
Press ! (main power) to turn off your TV.
4
Inform your nearest Sony service center about the number of times the 1 indicator flashes. Be sure to note the model name and serial number located on the rear of your TV.
Front of TV
1 indicator
19
KV-XG25M50
RM-952
Additional Information
30
Overview of controls
TV front panel
PROGR
SELECT
AUTO PROGR
2
(
MONO
)
PageFunction
Button
Preset channels automatically.5 Select the desired item. 11 Select program number. 12 Turn off completely or turn on the TV.12 Adjust volume. 12 Standby indicator.12 Select TV or video input. 13 Wake Up indicator.14 Stereo/bilingual indicator.20
Headphone jack.
AUTO PROGR SELECT PROGR +/–
! 2 +/–
1
t
(KV-XG29M61/XA21M61 only)
i
Additional Information
31
Remote Control
TV
1
2
3
4
6
7
8
9
0
5
JUMP
SOUND
MODE
FAVORITE
PROGR
-
2
The names/symbols of buttons on the remote are indicated in different colors to represent the available functions.
Label color
White
Green
Button function
For general TV operations
For Teletext operations
PageButton Function
SELECT +/– PROGR +/– 0 – 9,
-
2
+/–
?/1
t
a
%
JUMP
Timer operations
PIC MODE SOUND MODE FAVORITE Stereo/bilingual operations
(Not used for this models) A/B Teletext operations
(Not used for this models)
x
(red, green,
yellow, blue)
Select the desired item. 10 Adjust value. 10 Select program number. 12 Input numbers. 12 Adjust volume. 12 Turn off temporarily or 12
turn on the TV. Select TV or video input. 13 Display the TV program. 13 Mute the sound. 13 Display on-screen information.
13
Jump to previous program number. 13
Set TV to turn on automatically.
14
Set TV to turn off automatically.
14 Select picture mode. 15 Select sound mode. 15 Display favorite channels. 18
Select stereo/bilingual mode. 20
Display Teletext broadcast. 22
Display Teletext service contents.
23 Stop Teletext display from scrolling.
23 Reveal concealed information. 23 Enlarge the Teletext display. 23 Show TV screen while 23
waiting for Teletext page. Access a FASTEXT menu. 23
20
KV-XG25M50
RM-952
SECTION 2
2 Eight screws (+BVTP 4 × 16)
3 Three screws (+BVTP 4 × 16)
1 Rear cover
Three screws (Step Tapping)
1 Chassis assy
Control button
Two screws (+BVTP 3 × 12)
One screw (+BVTP 3 × 12)
DISASSEMBLY
2-1. REAR COVER REMOVAL
21
2-4. SERVICE POSITION
2-2. SPEAKER REMOVAL
2-5. REPLACEMENT OF PARTS
For replacement of the Control Button and Light Guide, unscrew them, exchange with the new parts, and fix them with screws (+BVTP) respectively.
2-5-1. REPLACEMENT OF CONTROL BUTTON
2-3. CHASSIS ASSY REMOVAL
2-5-2. REPLACEMENT OF LIGHT GUIDE
KV-XG25M50
RM-952
KV-XG25M50
3 Two connectors
4 Two screws (+BVTAP 3
× 12)
1 Two connectors
4 Four claws
5 H2 Board
2 Two connectors
4 B6 Board
5 A Board
1 Three screws
(+BVTAP 3 × 12)
2 Three screws (+BVTAP 3
× 12)
3 Two claws
4 Terminal bracket
1 Two screws
(+ BVTP 3 × 12)
2 One screw (+ BVTP 4 × 16)
2-6. TERMINAL BRACKET REMOVAL
22
2-7. H2 BOARD REMOVAL
2-8. A AND B6 BOARDS REMOVAL
RM-952
2-9 PICTURE TUBE REMOVAL
Anode button
a
a
b
b
c
Four DGC clips
Degaussing coil
9 Four claws
1 Three screws
(Step Tapping)
!™ Two screws
(Tapping)
5 Chassis assy
8 Deflection
yoke
7 Neck assy
6 C6 board
4 Anode cap
Picture tube
Cushion
!™ Two screws
(Tapping)
Tension
spring
DGC holder
DGC holder
Cushion (50 × 250) DGC
Cushion (50 × 250) DGC
2 Speaker
1 Three screws
(Step Tapping)
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
23
1 Turn up one side of the rubber cap in the direction indicated by the arrow a.
2 Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow b.
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.
HOW TO HANDLE AN ANODE-CAP
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.
KV-XG25M50
RM-952
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