Sony KV-25R2A Service Manual ▷ View online
5
TABLE OF CONTENTS
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR THE
CARBON PAINTED ON THE CRT, AFTER REMOVAL OF THE
ANODE CAP
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR THE
CARBON PAINTED ON THE CRT, AFTER REMOVAL OF THE
ANODE CAP
WARNING !!
AN ISOLATING TRANSFORMER SHOULD BE USED DURING ANY
SERVICE WORK TO AVOID POSSIBLE SHOCK HAZARD DUE TO
LIVE CHASSIS. THE CHASSIS OF THIS RECEIVER IS DIRECTLY
CONNECTED TO THE POWER LINE.
SERVICE WORK TO AVOID POSSIBLE SHOCK HAZARD DUE TO
LIVE CHASSIS. THE CHASSIS OF THIS RECEIVER IS DIRECTLY
CONNECTED TO THE POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARKED
ON
THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION
APRES AVOIR DECONNECTE LE CAP DE’LANODE,
COURT-CIRCUITER L’ANODE DU TUBE CATHODIQUE ET
CELUI DE L’ANODE DU CAP AU CHASSIS METALLIQUE
DE L’APPAREIL, OU AU COUCHE DE CARBONE PEINTE
SUR LE TUBE CATHODIQUE OU AU BLINDAGE DU TUBE
CATHODIQUE.
COURT-CIRCUITER L’ANODE DU TUBE CATHODIQUE ET
CELUI DE L’ANODE DU CAP AU CHASSIS METALLIQUE
DE L’APPAREIL, OU AU COUCHE DE CARBONE PEINTE
SUR LE TUBE CATHODIQUE OU AU BLINDAGE DU TUBE
CATHODIQUE.
ATTENTION !!
AFIN D’EVITER TOUT RISQUE D’ELECTROCUTION PROVENANT
D’UN CHÁSSIS SOUS TENTION, UN TRANSFORMATEUR
D’ISOLEMENT DOIT ETRE UTILISÈ LORS DE TOUT DÈPANNAGE.
LE CHÁSSIS DE CE RÈCEPTEUR EST DIRECTMENT RACCORDÈ
Á L’ALIMENTATION SECTEUR.
D’UN CHÁSSIS SOUS TENTION, UN TRANSFORMATEUR
D’ISOLEMENT DOIT ETRE UTILISÈ LORS DE TOUT DÈPANNAGE.
LE CHÁSSIS DE CE RÈCEPTEUR EST DIRECTMENT RACCORDÈ
Á L’ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS Á LA
SÈCURITÈ !!
LES COMPOSANTS IDENTIFIÈS PAR UNE TRAME ET PAR UNE
MARQUE
SUR LES SCHÈMAS DE PRINCIPE, LES VUES
EXPLOSÈES ET LES LISTES DE PIECES SONT D’UNE IMPORTANCE
CRITIQUE POUR LA SÈCURITÈ DU FONCTIONNEMENT, NE LES
REMPLACER QUE PAR DES COMPSANTS SONY DONT LE NUMÈRO
DE PIÈCE EST INDIQUÈ DANS LE PRÈSENT MANUEL OU DANS
DES SUPPLÈMENTS PUBLIÈS PAR SONY.
CRITIQUE POUR LA SÈCURITÈ DU FONCTIONNEMENT, NE LES
REMPLACER QUE PAR DES COMPSANTS SONY DONT LE NUMÈRO
DE PIÈCE EST INDIQUÈ DANS LE PRÈSENT MANUEL OU DANS
DES SUPPLÈMENTS PUBLIÈS PAR SONY.
Section
Title
Page
Section
Title
Page
1. GENERAL
Overview of TV buttons
.....................6
Using Select Mode
.....................6
Adjusting the Picture
.....................7
Adjusting the Sound
.....................7
Using the Sleep Timer
.....................8
Using the Wake Up Timer
.....................8
Viewing Teletext
.....................9
Exchanging Programme Pos
.....................9
Manually Tuning the TV
.....................10
Fine-Tuning Channels
.....................10
Using Optional Equipment
.....................11
Troubleshooting
.....................11
2. DISASSEMBLY
2-1.
Rear Cover Removal
.....................12
2-2.
Chassis Assy Removal
.....................12
2-3.
Service Position
.....................13
2-4.
S1 Board Removal
.....................13
2-5.
Picture Tube Removal
.....................14
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing
.....................15
3-2.
Convergence
.....................16
3-3.
Screen [G2] White Balance
.....................18
3-4.
Focus
.....................18
4. CIRCUIT ADJUSTMENTS
4-1.
Electrical Adjustments
.....................19
4-2.
Test Mode 2
.....................22
4-3.
FE-1 Self Diagnostic Software
.....................23
5. DIAGRAMS
5-1.
Block Diagram
.....................25
5-2.
Circuit Board Location
.....................30
5-3.
Schematic Diagrams and
Printed Wiring Boards
Printed Wiring Boards
.....................30
*
A Board
.....................35
*
S1 Board
.....................40
*
C Board
.....................43
5-4.
Semiconductors
.....................45
5-5.
IC Blocks
.....................47
6. EXPLODED VIEWS
6-1.
Chassis
.....................48
6-2.
Picture Tube
.....................49
7. ELECTRICAL PARTS LIST
.....................50
6
7
RM-883
PROGR
MENU
/
Basic TV Features
Overview of TV Buttons
On/Off Switch.
L/G/S/I R/D/D/D
2
Programme Up or
Down Buttons.
(selects TV channels).
Down Buttons.
(selects TV channels).
Volume Control Buttons.
Auto Tune
Button.
Button.
Video Input Button.
(selects input signals
from VCR etc.).
(selects input signals
from VCR etc.).
Overview of Remote Control Buttons
To Mute Sound
Press to mute TV sound. Press again
to restore the sound.
to restore the sound.
To Change Screen Format
Press to view programmes in 16:9
mode.
Press again to return to 4:3 mode.
mode.
Press again to return to 4:3 mode.
To Adjust TV Volume
Press to adjust the volume of the TV.
To Temporarily Switch Off TV
Press to temporarily switch off TV. Press
again to switch on TV from standby
mode.
To save energy we recommend switching off
completely when TV is not in use.
NOTE: After 15 - 30 minutes without a
TV signal and without any button being
pressed, the TV switches automatically
into standby mode.
again to switch on TV from standby
mode.
To save energy we recommend switching off
completely when TV is not in use.
NOTE: After 15 - 30 minutes without a
TV signal and without any button being
pressed, the TV switches automatically
into standby mode.
To Reveal On Screen Information
Press to reveal all on-screen indications.
Press again to cancel.
Press again to cancel.
To Select Channels
Press to select channels.
To Select Channels
Press to select channels.
For double-digit programme
numbers, e.g. 23, press -/-- first,
then the buttons 2 and 3.
If you enter an incorrect first
digit, this should be corrected by
entering another digit (0 - 9) and
then selecting -/-- button again to
enter the programme number of
your choice
numbers, e.g. 23, press -/-- first,
then the buttons 2 and 3.
If you enter an incorrect first
digit, this should be corrected by
entering another digit (0 - 9) and
then selecting -/-- button again to
enter the programme number of
your choice
8
Additional TV Features
Using Select Mode
You can select different preset picture and sound modes.
1
Press the MENU button on the remote control to
display the menu on the TV screen.
display the menu on the TV screen.
2
With the cursor pointing at the
SELEC
T
symbol on the
TV screen as shown, press the yellow button.
3
Press the blue button to select the desired mode:
Personal Mode - reverts to settings made in
“Adjusting the Picture and Sound” sections of
the manual
“Adjusting the Picture and Sound” sections of
the manual
Movie Mode - for films
Live Mode -for live broadcast programmes
Live Mode -for live broadcast programmes
4
Press the MENU button to remove the menu
display from the TV screen.
display from the TV screen.
Note: The mode selected in step 3 is now stored.
RM-883
PROGR
MENU
/
OFF
SELEC
T
Changing Modes Quickly
1
Press the button on the remote control to display
the three different modes.
the three different modes.
2
Press the button again to select your desired
mode.
mode.
OK
SELEC
T
OFF
SELEC
T
OFF
SECTION 1 GENERAL
The operating instructions mentioned here are partial abstracts
from the Operating Manual. The page numbers of the Operating
Instruction Manual remain as in the manual.
from the Operating Manual. The page numbers of the Operating
Instruction Manual remain as in the manual.
7
9
Additional TV Features
Adjusting the Picture
Although the picture is adjusted at the factory, you can modify it to suit your own
requirement.
requirement.
1
Press the button on the remote control to
display the three different modes on the TV
screen.
display the three different modes on the TV
screen.
2
Press the button to highlight the personal mode
symbol
symbol
as shown.
3
Press the MENU button to display the menu on
the TV screen.
the TV screen.
4
Press the blue button on the control to select the
symbol on the TV screen then press the yellow
button.
5
Press the blue button to select the item you wish
to change (see below).
to change (see below).
6
Press the red or yellow button to alter the selected
item.
item.
7
Press the MENU button to remove the menu
display from the TV screen.
display from the TV screen.
Symbol
Item
• Contrast
• Colour
• Brightness
• Sharpness
• Hue control (only for NTSC video signals)
• Reset - resets to factory preset picture level
• Represents the mode selected in the “Using
• Hue control (only for NTSC video signals)
• Reset - resets to factory preset picture level
• Represents the mode selected in the “Using
Select Mode” section.
OFF
SELEC
T
RM-883
PROGR
MENU
/
OFF
SELEC
T
IIIIIIIIIIIIIII - - - - - -
IIIIIIIIIIIIIII - - - - - -
IIIIIIIIIIIIIII - - - - - -
IIIIIIIIIIIIIII - - - - - -
IIIIIIIIIIIIIII - - - - - -
IIIIIIIIIIIIIII - - - - - -
IIIIIIIIIIIIIII - - - - - -
10
Adjusting the Sound
Although the sound is adjusted at the factory, you can modify it to suit your own
requirement.
requirement.
Additional TV Features
Symbol
Item
• Mono/Stereo
A:Channel 1 sound or Mono sound/
B:Channel 2 sound (to select your desired
language from a dual sound broadcast)
B:Channel 2 sound (to select your desired
language from a dual sound broadcast)
DSP
• On/Off (digital sound processor)
• Treble
• Bass
• Balance
• Reset (resets to factory preset sound level)
• Represents the mode selected in the “Using
• Represents the mode selected in the “Using
Select Mode” section of the manual.
1
Press the button on the remote control to
display the three different modes on the TV
screen.
display the three different modes on the TV
screen.
2
Press the button to highlight the personal mode
symbol
as shown.
3
Press the MENU button to display the menu on
the TV screen.
the TV screen.
4
Press the blue button to select the symbol on the
TV screen then press the yellow button.
TV screen then press the yellow button.
5
Press the blue button to select the item you wish to
change (see below).
change (see below).
6
Press the red or yellow button to alter the selected
item.
item.
7
Press the MENU button to remove the menu
display from the TV screen.
display from the TV screen.
OFF
SELEC
T
IIIIIIIIIIIIIIIIIIIIIII - - - - - -
IIIIIIIIIIIIIII
IIIIIIIIIIIIIII- -
IIIIIIIIIIIIIIIII - - - - - - - - -
DSP
ON OFF
MONO STEREO
RM-883
PROGR
MENU
/
OFF
SELEC
T
8
12
Using the Wake Up Timer
RM-883
PROGR
MENU
/
The TV may be set to switch on automatically after a length of time chosen by you.
You may set the time in 15 minute steps up to 12 hours.
You may set the time in 15 minute steps up to 12 hours.
1
Press the MENU button on the remote control to
display the menu on the TV screen.
display the menu on the TV screen.
2
Press the blue button on the control to select the
symbol on the TV screen, then press the yellow
button.
symbol on the TV screen, then press the yellow
button.
3
Press the blue button on the control to select the
symbol on the TV screen, then press the yellow
button.
symbol on the TV screen, then press the yellow
button.
4
Press the red or yellow button to set the time.
0:00 (OFF) 0:15 0:30 0:45 -----12:00
5
Press the standby button
/
.
The standby indicator on the TV flashes regularly
to indicate that the Wake Up Timer is active.
After the selected length of time, the TV switches
on automatically.
to indicate that the Wake Up Timer is active.
After the selected length of time, the TV switches
on automatically.
Notes:
• If you use the “Wake Up Timer” to switch the TV
on and for one hour after switching on, no TV or
Remote Control button is pressed, the TV switches
itself back into Standby mode and the indicator
on the TV lights.
Remote Control button is pressed, the TV switches
itself back into Standby mode and the indicator
on the TV lights.
• Any temporary power failure will cause a
misfunction in the “Wake Up Timer” and you will
have to reset the “Wake Up Timer”.
have to reset the “Wake Up Timer”.
OFF
0:45
OFF
OFF
Additional TV Features
OK
SELEC
T
OFF
SELEC
T
OFF
SELEC
T
OFF
11
Additional TV Features
Using the Sleep Timer
The TV may be set to switch automatically to the standby mode after a length of time
chosen by you. You may set the time in 15 minute steps up to 4 hours.
chosen by you. You may set the time in 15 minute steps up to 4 hours.
RM-883
PROGR
MENU
/
1
Press the MENU button on the remote control to
display the menu on the TV screen.
display the menu on the TV screen.
2
Press the blue button on the control to select the
symbol on the TV screen, then press the yellow
button.
symbol on the TV screen, then press the yellow
button.
3
Press the yellow button repeatedly until the
required amount of time delay appears on the
screen.
required amount of time delay appears on the
screen.
4
Once the time delay has been selected, press the
MENU button to remove the on-screen display.
MENU button to remove the on-screen display.
One minute before standby, the display shown
appears on the screen.
appears on the screen.
Notes:
• When watching TV, press the
button to display
time remaining.
• To return to normal operation from standby mode,
press the
/
button.
OK
SELEC
T
OFF
SELEC
T
OFF
SELEC
T
OFF
0:45
OFF
0:59
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