Design and specifications are subject to change without notice.
— 2 —
Page 3
KV-24FV12/25FV12/25FV12A/25FV12C
TABLE OF CONTENTS
SectionTitlePage
Warnings and Cautions...............................................................................................................................................................4
Self-Diagnostic Function .............................................................................................................................................................4
2-3.Service Position ............................................................................................................................................................13
3-5.Method of Setting the Service Adjustment Mode .........................................................................................................18
4-2.B+ Voltage Confirmation and Adjustment .....................................................................................................................19
5.CIRCUIT ADJUSTMENTS
5-1.Setting the Service Adjustment Mode ..........................................................................................................................21
5-3.Adjustment Buttons and Indicators...............................................................................................................................21
6-3.Printed Wiring Boards and Schematic Diagrams .........................................................................................................31
• A Board .................................................................................................................................................................... 33
• K Board .................................................................................................................................................................... 47
8.ELECTRICAL P AR TS LIST.................................................................................................................................................53
— 3 —
Page 4
KV-24FV12/25FV12/25FV12A/25FV12C
WARNINGS AND CAUTIONS
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.
WARNING!!
AN ISOLATION TRANSFORMER SHOULD BE USED
DURING ANY SERVICE TO AVOID POSSIBLE SHOCK
HAZARD, BECAUSE OF LIVE CHASSIS. THE CHASSIS
OF THIS RECEIVER IS DIRECTLY CONNECTED TO THE
AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
ON THE SCHEMA TIC 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. CIRCUIT ADJUSTMENTS THAT
ARE CRITICAL FOR SAFE OPERA TION ARE IDENTIFIED
IN THIS MANUAL. FOLLOW THESE PROCEDURES
WHENEVER CRITICAL COMPONENTS ARE REPLACED
OR IMPROPER OPERATION IS SUSPECTED.
ATTENTION!!
APRES AVOIR DECONNECTE LE CAP DE L'ANODE, 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 RESQUE D'ELECTROCUTION PROVENANT D'UN
CHÁSSIS SOUS TENSION, UN TRANSFORMATEUR D'ISOLEMENT DOIT ETRE
UTILISÉ LORS DE TOUT DÉPANNAGE. LE CHÁSSIS DE CE RÉCEPTEUR EST
DIRECTEMENT RACCORDÉ À L'ALIMENTATION SECTEUR.
A TTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR UNE MARQUE
SUR LES SCHEMAS DE PRINCIPE, LES VUES EXPLOSEES ET LES
LISTES DE PIECES SONT D'UNEIMPORTANCE CRITIQUE POUR LA
SECURITE DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES
COMPOSANTS SONY DONT LE NUMERO DE PIECE EST INDIQUE DANS
LE PRESENT MANUEL OU DANS DES SUPPLEMENTS PUBLIES P AR SONY.
LES REGLAGES DE CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR
LA SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS LE
PRESENT MANUEL. SUIVRE CES PROCEDURES LORS DE CHAQUE
REMPLACEMENT DE COMPOSANTS CRITIQUES, OU LORSQU'UN
MAUV AIS FONTIONNEMENT SUSPECTE.
SELF-DIAGNOSTIC FUNCTION
The units in this manual contain a self-diagnostic function. If an error occurs, the ST ANDBY/TIMER LED will automatically begin to flash.
The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED 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.
Diagnostic Test Indicators
When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem. If there is
more than one error, the LED will identify the first of the problem areas.
Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.
— 4 —
Page 5
Display of Standby/Timer LED Flash Count
2 times
4 times
5 times
KV-24FV12/25FV12/25FV12A/25FV12C
LED ON 0.3 sec.
LED OFF 0.3 sec.
Diagnostic ItemFlash Count*
+B overcurrent2 times
V ertical deflection stopped4 times
White balance failure5 times
*One flash count is not used for self-diagnostic.
LED OFF
3 sec.
STANDBY/TIMER LED
Stopping the Standby/Timer LED 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.
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 occurrences of failure on the screen for confirmation.
To Bring Up Screen Test
In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:
DisplayChannel
5
Sound volume
Power ON
Self-Diagnostic Screen Display
SELF DIAGNOSTIC
2:0
3:N/A0
4:0
5:1
101:N/A0
Note that this differs from entering the service mode (sound volume
Numeral “0” means that no fault was detected.
Numeral “1” means a fault was detected one time only.
— 5 —
+
).
Page 6
KV-24FV12/25FV12/25FV12A/25FV12C
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 when the diagnostic screen is displayed,
as shown below:
8
Quitting the Self-Diagnostic Screen
To quit the entire self-diagnostic screen, turn of f the power switch on the Remote Commander or the main unit.
ENTERChannel
Self-Diagnostic Circuit
+B overcurrent (OCP)Occurs when an overcurrent on the +B (135V) line is detected by pin 18 of IC1301 (MB Board).
If the voltage of pin 18 of IC1301 (MB Board) is less than 1V when V.SYNC is more than seven
verticals in a period, the unit will automatically turn off.
I-ProtOccurs when an absence of the vertical deflection pulse is detected by pin 17 of IC1001 (MB
Board). Power supply will shut down when waveform interval exceeds 2 seconds.
IKIf the RGB levels* do not balance within 2 seconds after the power is turned on, this error will be
detected by IC1301 (MB Board). TV will stay on, but there will be no picture.
*(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).
— 6 —
Page 7
SAFETY CHECK-OUT
KV-24FV12/25FV12/25FV12A/25FV12C
After correcting the original service problem, perform the
following saf ety checks before releasing the set to the
customer:
1. Check the area of your repair for unsoldered or poorly
soldered connections. Check the entire board surface
for solder splashes and bridges.
2. Check the interboard wiring to ensure that no wires
are “pinched” or touching high-wattage resistors.
3. Check that all control knobs, shields, covers, ground
straps, and mounting hardware have been replaced.
Be absolutely certain that you have replaced all the
insulators.
4. Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair .
Point them out to the customer and recommend their
replacement.
5. Look for parts which, though functioning, show
obvious signs of deterioration. Point them out to the
customer and recommend their replacement.
6. Check the line cords for cracks and abrasion.
Recommend the replacement of any such line cord
to the customer.
7. Check the B+ and HV to see if they are specified
values. Make sure your instruments are accurate;
be suspicious of your HV meter if sets always have
low HV.
8. Check the antenna terminals, metal trim, “metallized”
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.
Leakage Test
The AC leakage from any exposed metal part to earth
ground and from all exposed metal parts to any exposed
metal part having a return to chassis, must not exceed
0.5 mA (500 microamperes). Leakage current can be
measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson
229 or RCA WT-540A. Follow the manufacturers'
instructions to use these instructions.
2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC voltmeter.
The “limit” indication is 0.75 V, so analog meters must
have an accurate low voltage scale. The Simpson’s
250 and Sanwa SH-63TRD are examples of passive
VOMs that are suitable . Nearly all battery-operated
digital multimeters that have a 2 VAC range are
suitable (see Figure A).
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the coverplate retaining screw on most AC outlet bo x es is also at
earth ground. If the retaining screw is to be used as your
earth ground, verify that it is at ground by measuring the
resistance between it and a cold-water pipe with an
ohmmeter. The reading should be z ero ohms . If a cold-water
pipe is not accessible, connect a 60- to 100-watt troub lelight (not a neon lamp) between the hot side of the
receptacle and the retaining screw . Try both slots, if
necessary , to locate the hot side on the line; the lamp should
light at normal brilliance if the screw is at ground potential
(see Figure B).
— 7 —
Trouble Light
AC Outlet Box
Figure B. Checking for earth ground.Figure A. Using an AC voltmeter to check AC leakage.
Ohmmeter
Cold-water Pipe
Page 8
The instructions mentioned here are partial abstracts from the Operating Instruction Manual.
4
Connecting Additional Equipment
TV and VCR
1
Connect the coaxial cable from your TV antenna or cable service to
the IN jack on your VCR.
2
Connect a coaxial cable (not supplied) from the OUT jack on your
VCR to the VHF/UHF jack on the TV.
(Optional connection)
3
If your VCR is equipped with video outputs, you can get better
picture quality by connecting A/V cables (not supplied) from
AUDIO and VIDEO OUT on your VCR to AUDIO/VIDEO IN on
your TV.
To watch video programs from your VCR, tune your TV to channel 3 or 4 (as
set on the rear of your VCR).
You can use the button to switch between the VHF/UHF and VIDEO
inputs.
For optimum picture quality, use S VIDEO (if your VCR is equipped with t he
S VIDEO connection) instead of the yellow A/V cable. S VIDEO does not
provide sound, the audio cables must still be connected.
(Optional connection)
From
VCR
2
3
Rear of TV
cable/
Coxial
Cable
1
antenna
The page numbers shown reflect those of the Operating Instruction Manual.
Connecting Your TV
Read this section before setting up your TV for the first time. This section
covers basic connections in addition to any optional equipment you may
be connecting.
Basic Connections
TV with indoor or outdoor antenna, or CATV cable
Depending on the cable available in your home, choose one of the
connections below:
KV-24FV12/25FV12/25FV12A/25FV12C
SECTION 1 GENERAL
— 8 —
If you are connecting to an indoor or outdoor antenna, you may need to
adjust the orientation of the antenna for best reception.
3
Page 9
TV and Cable Box
6
TV, VCR and Cable box
1
Connect the coaxial cable from your cable service to the IN jack on
your cable box.
2
Connect a coaxial cable (not supplied) from the OUT jack on your
cable box to the IN jack on your VCR.
3
Connect a coaxial cable (not supplied) from the OUT jack on your
VCR to the VHF/UHF jack on the TV.
(Optional connection)
4
If your VCR is equipped with video outputs, you can get better
picture quality by connecting A/V cables (not supplied) from
AUDIOand VIDEO OU Ton your VCRto AU DIO/VIDEOIN on
your TV.
If you will be controlling all channel selection through your cable box, you
should consider using the Channel Fix feature, (see page 21).
You can use the button to switch between the VHF/UHF and VIDEO
inputs.
For optimum picture quality, use S VIDEO (if your VC R is equipped with the
S VIDEO connection) instead of the yellow A/V cable. S VIDEO does not
provide sound, the audio cables must still be connected.
3
From cable
4
(Optional connection)
Cable box
1
VCR
2
Rear of TV
Coaxial
Cable
Coaxial
— 9 —
1
2
Cable
1
From
cable
Connect the coaxial cable from your cable service to the IN jack on
your cable box.
Connect a coaxial cable (not supplied) from the OUT jack on your
cable box to the VHF/UHF jack on the TV.
To view channels from your cable box, tune your TV to channel 3 or 4 (as set
on the rear panel of y our cab le box) a nd use the cabl e box ’s remote control to
change channels.
2
Cable Box
Coaxial
Cable
Rear of TV
KV-24FV12/25FV12/25FV12A/25FV12C
If you will be controlling all channel selection through your cable box, you
should consider using the Channel Fix feature, (see page 21).
5
Page 10
TV and Satellite Receiver
8
TV, Satellite Receiver and VCR
1 Connect the cable from your satellite antenna to SATELLITE IN on
the satellite receiver.
2 Connect the coaxial cable from your cable service or antenna to the
IN jack on your VCR.
3 Using a coaxial cable, connect the OUT jack on your VCR IN to the
VHF/UHFjackonyourTV.
4 Using A/V cables, connect AUDIO and VIDEO OUT on your
satellite receiver to AUDIO and VIDEO IN on your VCR.
5 Using A/V cables,connect AUDIO and VIDEO OUT on yourVCR to
AUDIO and VIDEO IN on your TV.
To view from the satellite receiver or VCR, select the video input to which
your satellite receiver or VCR is connected by pressing on the remote
control.
AUDIO R AUDIO L VIDEO
AUDIO R AUDIO L VIDEO
SATELLITE IN
VHF/UHF
OUT
IN
LINE OUT
LINE IN
VHF/UHF
OUT
IN
LINE OUT
Satellite receiver
4
5
2
3
1
Rear of TV
VCR
Satellite
antenna
From
antenna
cable/
cable
Rear of TV
From
2
cable/
antenna
Satellite receiver
— 10 —
1
Satellite
antenna
cable
Connect the cable from your satellite antenna to SATELLITE IN on
1
SATELLITE IN
AUDIO R AUDIO L VIDEO
LINE OUT
3
VHF/UHF
IN
OUT
your satellite receiver.
2
Connect the coaxial cable from your cable service or antenna to
the VHF/UHF jack on your TV.
3
Using A/V cables, connect AUDIO and VIDEO OUT on your
satellite receiver to AUDIO and VIDEO IN on your TV.
You can use the button to switch between the VHF/UHF and VIDEO
inputs.
For optimum picture quality, use S VIDEO (if your Satellite Receiver is equipped
with the S VIDEO connection) instead of the yellow A/V cable. S VIDEO does
not provide sound, the audio cables must still be connected.
KV-24FV12/25FV12/25FV12A/25FV12C
7
Page 11
Using the Remote Control and
12
MTS/SAPCycles through the Multi-channel
TV Sound (MTS) options: Stereo,
Mono, and Auto-SAP (Second
Audio Programming).
DISPLAYPress to display the current time,
(if set) and channel number .
Cycles through available Steady
Sound settings, (see page 19).
JUMPAlternates between the lasttwo
channels selected with the
buttons.
GUIDEBrings up the custom guide of
your satellite receiver.
MENUDisplays the on-screenmenu.
Press again to exit the menu at
any time.
RESETPress to returnto factory settings
while in an on-screen menu.
CODE SETUse to program your remote
control to operate connected
videoequipment,(seepage31).
If you lost your remote control, see page 35.
0 9
Basic Functions
This section shows you how to use the more advanced buttons on the
remote control and how to use the on-screen menus.
Using the Remote Control
— 11 —
ButtonDescription
POWERPress when you want to turn
FUNCTIONPress when you want to control
MUTINGInstantly turns off the sound.
SYSTEM OFFPowers off all Sony equipment at
TV/VIDEOCycles through availablevideo
TV/VTRPress when you are finished
PICTURE MODECycles through the available
SLEEPTurns the TV off automatically in
connected equipment on and off.
connected equipment with your
remote control.
Press again or pressto restore
sound.
once, (may not work with older
equipment).
inputs.
using a VCR and you want to
switch to the TV input. Your VCR
power will remain on.
Moves the cursor in theon-screen
menus. Press the arrow buttons to
move the cursor, press the center
button to select or access an
option.
VideoMode settings.
approximately15, 30, 45, 60, or 90
minutes. Cancel by pressing until
SLEEP OFF appears.
KV-24FV12/25FV12/25FV12A/25FV12C
(continued)
11
Page 12
— 12 —
Troubleshooting
If you are having a problem with your TV , try the suggestions below. If
the problem persists, contact your nearestSony dealer.
No picture, no
sound
Poor or no
picture, good
sound
Good picture,
no sound
No color
Only snow
appears on the
screen
Dotted linesor
stripes
Double images
or ghosts
Make sure the power cord is plugged in.
If a red light is flashing on the front of your TV for
more than a few minutes, disconnect and reconnect
the power cordto restore the TV. If the problem
continues,call your local service center.
Check the TV/VIDEO settings: when watching TV,set
to TV; when watching video equipment, set to VIDEO
(page 11).
Make sure the batteries havebeen inserted correctly
into the remote control (page 2).
Try another channel, it could be station trouble.
Adjust Picture in the Video menu (page 18).
Adjust Brightness in the Video menu (page 18).
Check the antenna and/or cable connections(page 3).
Check your Audio settings. Your TV may be set to
Auto-SAP (page 20).
Adjust Color in the Video menu (page 18).
Check the Cable setting in the Options menu under
Setup (page 30).
Check the antenna and/or cable connections(page 3).
Make sure the channel selected is currently
broadcasting.
Adjust the antenna.
Move the TV away from other electronic equipment.
Some electronic equipment can create electrical noise,
which can interferewith TV reception.
Check your outdoorantenna or callyour cable service.
KV-24FV12/25FV12/25FV12A/25FV12C
34
Page 13
2-1. REAR COVER REMOVAL
KV-24FV12/25FV12/25FV12A/25FV12C
SECTION 2
DISASSEMBLY
Screw +BVTP 4x16
Screw +BVTP 4x16
Screw +BVTP 4x16
Rear Cover
2 Screws +BVTP 4x12
Screw +BVTP 4x16
Screw +BVTP 4x16
Screw +BVTP 4x16
Screw +BVTP 4x16
2-2. CHASSIS ASSEMBLY REMOVAL2-3. SERVICE POSITION
CB Board
CB Board
VB Board
VB Board
Claw
MB Board
K Board
A Board
— 13 —
MB Board
K Board
A Board
(KV-25FV12A ONLY)
HZ Board
Page 14
KV-24FV12/25FV12/25FV12A/25FV12C
2-4. PICTURE TUBE REMOVAL
WARNING:
BEFORE REMOVING
THE ANODE CAP
High voltage remains in the CRT
even after the power is disconnected.
T o avoid electric shock, discharge
CRT before attempting to remove the
anode cap. Short between anode and
CRT coated earth ground strap.
Coated
Earth
Ground
Strap
10
9
8
7
6
5
1
2
3
4
1.Discharge the anode of the CRT and remove the anode cap.
2.Unplug all interconnecting leads from the deflection yoke, neck
assembly, degaussing coils and CR T grounding strap.
3.Remove the CB Board from the CRT.
4.Remove the chassis assembly.
5.Loosen the neck assembly fixing screw and remove.
6.Loosen the deflection yoke fixing screw and remove.
7.Place the set with the CRT face down on a cushion and remove
the degaussing coil holders.
8.Remove the degaussing coils.
9.Remove the CRT grounding strap and spring tentioners.
10. Unscrew the four CRT fixing screws [located on each CRT
corner] and remove the CRT [Take care not to handle the
CRT by the neck].
ANODE CAP REMOVAL
WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electrical shock, discharge the CRT before
NOTE: After removing the anode, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield,
attempting to remove the anode cap. Short between anode and coated earth ground strap of CRT.
or carbon painted on the CRT.
REMOVAL PROCEDURES
c
b
a
Anode Button
1
Turn up one side of the rubber cap in
the direction indicated by arrow
2
a
.
Use your thumb to pull the rubber
cap firmly in the direction indicated
by arrow
b
.
3
When one side of the rubber cap
separates from the anode button,
the anode cap can be removed by
turning the rubber cap and pulling
it in the direction of arrow
c
.
HOW TO HANDLE AN ANODE CAP
1
Do not use sharp objects which may cause damage to the
surface of the anode cap.
2
To avoid damaging the anode cap, do not squeeze the rubber
covering too hard. A material fitting called a shatter-hook terminal
is built into the rubber.
3
Do not force turn the foot of the rubber cover. This may cause
the shatter-hook terminal to protrude and damage the rubber.
— 14 —
Page 15
SECTION 3
SET-UP ADJUSTMENTS
KV-24FV12/25FV12/25FV12A/25FV12C
The following adjustments should be made when
a complete realignment is required or when a new
picture tube is installed.
These adjustments should be performed with rated
power supply voltage unless otherwise noted.
Set the controls as follows unless otherwise noted:
VIDEO MODE: STANDARD
PICTURE control: ................ Normal
BRIGHTNESS control: ........ Normal
3-1. BEAM LANDING
Before beginning adjustment procedure:
1. Degauss the entire screen.
2. Feed in the white pattern signal.
Adjustment Procedure
1. Input a raster signal with the pattern generator .
2. Loosen the deflection yoke mounting screw and set the purity
control to the center as shown below.
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
3. Focus
4. Screen (G2)
5. White Balance
Note: T est equipment required:
• Color Bar Pattern Generator
• Degausser
• DC Power Supply
• Digital Multimeter
5. Move the deflection yoke forward and adjust so that the entire
screen becomes green.
Purity Control
3. T urn the raster signal of the pattern generator to green.
4. Move the deflection yoke backward and adjust the purity
control so that green is in the center and red and blue are
at the sides evenly.
Blue Red
Green
6. Switch over the raster signal to red and blue and confirm
the condition.
7. When the position of the deflection yoke is determined,
tighten it with the deflection yoke mounting screw .
8. If landing at the corner is not right, adjust by using the disk
magnets.
Purity control
corrects this area
Disk magnets
or rotatable disk
magnets correct
these areas (a-d)
b
d
cd
Deflection yoke positioning
corrects these areas
ba
a
— 15 —
c
Page 16
KV-24FV12/25FV12/25FV12A/25FV12C
3-2. CONVERGENCE
Before starting convergence adjustments:
1. Perform FOCUS, V.LIN AND V.SIZE adjustments.
2. Set BRIGHTNESS control to minimum.
3. Feed in dot pattern.
Vertical Static Con vergence
1. Adjust V.STAT magnet to converge red, green and blue dots in
the center of the screen (Vertical movement adjust V.STAT
RV701 to converge).
Horizontal Static Convergence
If the blue dot does not converge with the red and green dots,
perform the following:
1. Move BMC magnet (a) to correct insufficient H. Static
convergence.
2. Rotate BMC magnet (b) to correct insufficient V. Static
convergence.
3. After adjusting the BMC magnet, repeat Beam Landing
Adjustment.
V-STAT
BMC MAGNET
PURITY
2. Tilt the V.STAT magnet and adjust static convergence to open
or close the V.STAT magnet.
When the V.STAT magnet is moved in the direction of arrows a
and b, red, green, and blue dots move as shown below:
(1)
a
b
(2)
a
(3)
b
b
b
a
b
a
B
G
R
BGR
RGB
R
G
B
b
B
G
R
B
G
R
b
BMC magnet
Dynamic Convergence Adjustment
Before performing this adjustment, perform Horizontal
and Vertical Static Convergence Adjustment.
1. Slightly loosen deflection yoke screw.
2. Remove deflection yoke spacers.
3. Move the deflection yoke for best convergence
as shown on the following page.
— 16 —
Page 17
KV-24FV12/25FV12/25FV12A/25FV12C
ba
cd
a
b
d
a-d: screen-corner
misconvergence
c
BGR
RGB
R
G
B
BGR
B
G
R
RGB
RGB
G
B
B
G
R
BGR RGB
R
G
B
R
4. Tighten the deflection yoke screw.
5. Install the deflection yoke spacers.
TLH Plate Adjustment
1. Input crosshatch pattern.
2. Adjust PICTURE QUALITY to standard, PICTURE and
BRIGHTNESS to 50%, and OTHER to standard.
3. Adjust the Horizontal Convergence of red and blue dots
by tilting the TLH plate on the deflection yoke.
Perform adjustments while tracking items 1 and 2.
Screen-Corner Convergence
1. A ffix a permalloy assembly corresponding to the
misconverged areas.
3-3. FOCUS
1. Adjust FOCUS control for best picture.
Focus (FV)
Screen (G2)
3-4. SCREEN (G2)
1. Input a dots pattern.
2. Set the PICTURE and BRIGHTNESS controls at minimum
and COLOR control at normal.
3. Adjust SBRT, GCUT, BCUT in service mode with an
oscilloscope as shown below so that voltages on the red,
green, and blue cathodes are 170 VDC.
4. Adjust XCV core to balance X axis.
5. Adjust YCH VR to balance Y axis.
6. Adjust vertical red and blue convergence with V.TILT
(TLV VR).
B R R B
(R)(B) (B)(R)
TLH+
TLH-
Pedestal
Ground
170 VDC
4. Observe the screen and adjust SCREEN (G2) VR in FBT
to obtain the faintly visible background of dot signal.
— 17 —
Page 18
KV-24FV12/25FV12/25FV12A/25FV12C
3-5. METHOD OF SETTING THE SERVICE
ADJUSTMENT MODE
Service Mode Procedure
1. Standby mode (power off).
2.
DisplayChannel
5
Sound volumePower
+
on the Remote Commander (press each button within a
second).
Service Adjustment Mode In
1. The CR T displays the item being adjusted.
Disp.
Item
(Item)
Data
SERVICE HSIZ 0
2. Press or on the Remote Commander to select the item.
3. Press
or on the Remote Commander to change the
data.
4. Press
then to save into the memory.
Service Adjustment Mode Memory
Turn set off then on to exit service adjustment mode.
SERVICE WRITE
MUTING
ENTER
Green
Red
3-6. WHITE BALANCE ADJUSTMENTS
1. Input an entire white signal with burst.
2. Set to Service Adjustment Mode.
3. Set DCOL to “0”.
4. Set the PICTURE and BRIGHTNESS to minimum.
5. Adjust with SBR T if necessary .
6. Select GCUT and BCUT with
7. Adjust with
and for the best white balance.
8. Set PICTURE and BRIGHTNESS to maximum.
9. Select GDRV and BDRV with
10.Adjust with
and for the best white balance.
11.Reset DCOL to “1”.
12. To write into memory, press
and .
and .
then .
— 18 —
Page 19
SECTION 4
SAFETY RELATED ADJUSTMENTS
KV-24FV12/25FV12/25FV12A/25FV12C
4-1.
R564 CONFIRMATION METHOD
(HV HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS
The following adjustments should always be performed when
replacing the following components which are marked with
1. Using a Variac, apply AC input voltage: 120-220 ± 2 VAC.
2. T urn the POWER switch ON.
3. Input a white signal and set the PICTURE and
BRIGHTNESS controls to maximum.
4. Confirm that the voltage between C546 (+) or TP503
and ground is more than 97 VDC.
Hold-Down Operation Confirmation
1. Connect the current meter between Pin 1 1 of the FBT
(T505) and the PWB land where Pin 11 would normally
attach. (See Figure 1 on the next page.)
2. Input a dot signal and set PICTURE and BRIGHTNESS
to minimum: IABL = 100 ± 100 µA.
3. Confirm the voltage of A Board TP-600 is 135 ± 1 VDC.
4. Connect the digital voltmeter and the DC power supply
via diode 1SS119 to C546 (+) and ground. (See Figure 1
on the next page.)
5. Increase the DC power voltage gradually until the picture
blanks out.
6. T urn DC power source off immediately .
7. Read the digital voltmeter indication
(standard < 138 ± 0.3 VDC).
8. Input a white signal and set PICTURE and BRIGHTNESS to
maximum: IABL = 1650 ± 100 µA.
9. Repeat steps 4 to 7.
Hold-Down Readjustment
If the setting indicated in step 2 of Hold-Down Operation
Confirmation cannot be met, readjustment should be performed by
altering the resistance value of R564 component marked with
T505
FBT
ammeter
3.0 mA DC
range
ABL
+
A
IABL
-
.
4-2. B+ VOLT A GE CONFIRMATION AND
ADJUSTMENT
Note: The following adjustments should always be performed
when replacing the following components, which are marked with
on the schematic diagram on the A Board.
A BOARD:IC601, PH601
1. Using a Variac, apply AC input voltage: 130 ± 2 VAC.
2. Input a dot signal.
3. Set the PICTURE and BRIGHTNESS controls to minimum.
4. Confirm that the voltage of A Board TP-600 is <136 VDC.
5. If step 4 is not satisfied, replace the components listed above,
then repeat steps 1–3.
— 19 —
Page 20
KV-24FV12/25FV12/25FV12A/25FV12C
11119
+
+
+
+
18
1818
9
5
6
C
9
5
6
C
9
5
6
9
5
C
6
C
R601
R601
R601R601
R615
R615
R615R615
D616
D616
D616D616
1
6
0
B
1
F
0
6
B
F
1
6
0
B
1
F
0
6
B
F
C624
C624
C624C624
H.DRIVE
H.DRIVE
H.DRIVEH.DRIVE
CN511
CN511
C611
C611
CN511CN511
C611C611
C654
C654
C654C654
CN506
CN506
CN506CN506
1111
1111
CN515
CN515
CN515CN515
+B
+B
+B+B
R515
R515
R515R515
C536
C536
C536C536
D521
D521
D521D521
4444
1111
5555
7777
R503
R503
R503R503
R516
R516
R516R516
C503
C503
C503C503
C554
C554
C554C554
R502
R502
R502R502
9
99
D620
D620
D620D620
10
1018
1010
5
6
R
5
6
R
9
9
5
6
R
5
6
R
9
9
L602
L602
L602L602
C510
C510
C629
C629
C629C629
T504
T504
T504T504
H.PULSE
H.PULSE
H.PULSEH.PULSE
FB503
FB503
FB503FB503
R507
R507
R507R507
T503
T503
T503T503
T502
T502
T502T502
Q501
Q501
Q501Q501
C504
C504
C504C504
R547
R547
R547R547
C510C510
L509
L509
L509L509
L505
L505
L505L505
C517
C517
C517C517
C513
C513
C513C513
R505
R505
R505R505
C555
C555
C555C555
R504
R504
R504R504
C505
C505
C505C505
C515
C515
C515C515
R553
R553
R553R553
R564
R506
R506
R506R506
L502
L502
L502L502
E
E
E
E
2
0
5
Q
2
0
5
Q
2
0
2
5
0
Q
5
Q
O
-
H
O
-
H
T
U
T
U
O
-
O
H
-
H
T
U
T
U
L510
L510
L510L510
DIGITAL
MULTIMETER
R454
R454
R454R454
JR503
JR503
JR503JR503
R445
R445
R445R445
Q411
Q411
Q411Q411
C524
C524
C524C524
D506
D506
D506D506
C550
C550
C550C550
C511
C511
C511C511
L501
L501
L501L501
B
B
B
B
B
B
B
B
C
C
CC
C509
C509
C509C509
R568
R568
R568R568
POWER
SUPPLY
+
–
1SS119
+
–
C546
R438
R438
R449
R449
R449R449
C448
C448
C448C448
R450
R450
R450R450
R567
R567
R567R567
R565
R565
R565R565
IC501
IC501
IC501IC501
R522
R522
R522R522
R525
R525
R525R525
Q503
Q503
Q503Q503
R447
R447
R447R447
D507
D507
D507D507
FB502
FB502
FB502FB502
8888
1111
R527
R527
R541
R541
R541R541
R514
R514
R514R514
R527R527
B
B
E
E
BB
E
E
E
E
E
E
C525
C525
C525C525
5555
4444
3333
2222
1111
5
1
N
0
C
1
5
0
N
C
5
1
N
0
C
1
5
0
N
C
R546
R546
R546R546
R533
R533
R533R533
R534
R534
C551
C551
R534R534
C551C551
R438R438
C530
C530
C530C530
R529
R529
R529R529
5555
R573
R573
R573R573
R531
R531
R531R531
4444
C541
C541
C541C541
D510
D510
D510D510
6
6
6
6
6
6
6
6
R539
R539
R539R539
R518
R518
R518R518
7
7
77
R540
R540
R540R540
C543
C543
C543C543
C519
C519
C519C519
R537
R537
R537R537
D511
D511
D511D511
C552
C552
C552C552
R403
R403
R403R403
R563
R563
R563R563
C546
C546
C546C546
H.PROT
H.PROT
H.PROTH.PROT
C542
C542
C542C542
2
2
22
4
4
44
2
2
2
2
C518
C518
C518C518
IC502
IC502
IC502IC502
1
1
11
TH501
TH501
TH501TH501
R543
R543
R543R543
6
6
6
6
200V
200V
200V200V
6666
V DY -
V DY V DY -V DY -
V DY +
V DY +
V DY +V DY +
H DY -
H DY H DY -H DY -
H DY -
H DY H DY -H DY -
H DY +
H DY +
H DY +H DY +
H DY +
H DY +
H DY +H DY +
R545
R545
R545R545
L507
L507
L507L507
R225
R225
R225R225
D235
D235
D235D235
D234
D234
D234D234
C213
C213
C213C213
R218
R218
R218R218
R407
R407
R407R407
-13V
-13V
-13V-13V
HEATER
HEATER
HEATERHEATER
C211
C211
C211C211
Q205
Q205
Q205Q205
Q206
Q206
Q206Q206
1
1
1
1
CN502
CN502
CN502CN502
D232
D232
D232D232
C523
C523
C523C523
R532
R532
R532R532
T505
Q201
Q201
Q201Q201
D236
D236
D236D236
R232
R232R232
D233
D233
D233D233
R511
R511
R511R511
R561
R561
R561R561
FBT
135V
135V
135V135V
T505
T505
T505T505
ABL11
R226
R226
R226R226
R227
R227
R227R227
R231
R231R232
R231R231
D520
D520
D520D520
D518
D518
D518D518
D517
D517
D517D517
D514
D514
D514D514
C532
C532
C532C532
R558
R558
R558R558
R559
R559
JR502
JR502
JR502JR502
R559R559
R557
R557
R557R557
Q505
Q505
Q505Q505
R554
R554
R554R554
D516
D516
D516D516
R555
R555
R555R555
R535
R535
R535R535
JUMPER-ID
JUMPER-ID
JUMPER-IDJUMPER-ID
R801
R801
R801R801
R803
R803
R803R803
R804
R804
R804R804
CN504
CN504
CN504CN504
TP600
AMMETER
3mA dc range
A
+
–
Figure 1
— 20 —
Page 21
SECTION 5
CIRCUIT ADJUSTMENTS
ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER
Use the Remote Commander (RM-Y168) to perform the circuit adjustments in this section.
NOTE: T est Equipment Required:
• Pattern generator
• Frequency counter
• Digital multimeter
• Audio oscillator
KV-24FV12/25FV12/25FV12A/25FV12C
5-1. SETTING THE SERVICE ADJUSTMENT MODE
1. Standby mode (power off).
2.
DisplayChannel
5
Sound volumePower
+
on the Remote Commander (press each button within a
second).
Service Adjustment Mode On
1. The CR T displays the item being adjusted.
Disp.
Item
(Item)
Data
SERVICE HSIZ 0
2. Press or on the Remote Commander to select an item.
3. Press
4. Press
or on the Remote Commander to change the data.
then to save into the memory.
Service Adjustment Mode Memory
5-2. MEMORY WRITE CONFIRMATION METHOD
1. After adjustment, remove the power plug from the AC outlet,
then plug it in again.
2. T urn the power switch ON and set to service mode.
3. Call the adjusted items again to confirm they were adjusted.
5-3. ADJUSTMENT BUTTONS AND INDICATORS
MUTING
1
POWER
DISPLAY
3
5
6
SERVICE WRITE
MUTING
ENTER
Green
Red
1. Press then on the Remote Commander to
initialize.
SERVICE RESET
Carry out step 1 when adjusting
IDs 0–4 and when replacing
and adjusting IC1003.
2. T urn set off then on to exit service adjustment mode.
Palette mode controls this register
Palette mode controls this register
AVERAGE
DATA
38
21
9
5
7
32
39
39
0
0
2
0
0
0
0
49
32
6
8
0
6
47
31
1
12
5
0
1
0
0
0
0
36
26
25
8
6
7
1
15
15
15
1
1
1
0
0
1
1
0
0
7
1
1
1
1
1
1
7
1
1
0
7
— 22 —
Page 23
KV-24FV12/25FV12/25FV12A/25FV12C
FIX
Reg #ITEMFUNCTIONRANGE
64VSSVertical Sync Slice Level0,1**0
65HSSHorizontal Sync Slice Level0,100
66HMSK0,100
67VTMSSelect Signal VTIM Pin0-300
68CDMDVertical Count Down Mode Switching0-33***0
69AFCAFC Loop Gain Switching0-30000
70FIFRField Frequency0-3*3113
71SBALSub Balance0-1557
72SBASSub Bass0-1509
73STRESub Treble0-1539
74BBELBBE Low0-15412
75BBEHBBE High0-1559
76SRNDSurround0,63013
77BBEBBE On/Off0,101
78DISPO.S.D Display Position0-631515
79TROTTilt Correction0-633131
80HCLWHorizontal Count Lower Limit0-1271616
81HCHGHorizontal Count High Limit0-1276464
82ABL00,141
83ABL10-77
84SYSCColor System0-706
85VENHVertical Enhancement0-704
86CBPC0,130
87BYCF0,100
88KILC0,10
89LDOT0,110
90CORE0,110
91CHTR0,10
92CHPF0,11
93ENHO0,10
94ID00,25525See ID Map
95ID10,2553See ID Map
96ID20,25591See ID Map
97ID30,2552See ID Map
98ID4 0,255233See ID Map
99ID50,25517See ID Map
100ID60,2550See ID Map
* FIFR = 3 for NTSC models, FIFR=1 for Trinorma models
** VSS = 1 for US & CND, VSS=0 for Other
*** CDMD = 3 for US & CND, CDMD =0 for Other
**** KV-25FV12A/25FV12C =1; Others = 0
DATA NTSC PAL M PAL N VIDEORF
Palette mode controls this register
Palette mode controls this register
SERVICE ID0 25
AVERAGE
Notes:
No. 1–100 show the order that each adjustment mode may be selected while in service mode.
Data Range shows the range of possible settings for each adjustment mode.
Initial Data shows the standard settings for each adjustment mode.
5-4. MB BOARD ADJUSTMENTS
H. Frequency (Free Run) Check
1. Input a TV mode (RF) with no signal.
2. Connect a frequency counter to base of Q501
(TP-500 H. DRIVE) on the A Board.
3. Check H. Frequency for 15735 ± 200 Hz, and 15650 ± 200
Hz for P AL-N (KV-25FV12A ONL Y.)
V. Frequency (Free Run) Check
1. Select video 1 with no signal input.
2. Set the conditions for a standard setting.
3. Connect the frequency counter to TP-502 (V OUT) or
CN501 pin
(V DY+) and ground on the A Board .
4. Check that V. Frequency shows 60 ± 4 Hz
for NTSC, 50 ± 4 Hz for P AL-N (KV-25FV12A ONLY).
Drive (RDRV)
1. Input a color-bar signal and set the level to 75%.
2. In S tandard mode, set PICTURE to maximum and
COLOR to minimum.
3. Activate the Service Adjustment Mode.
— 23 —
Page 24
KV-24FV12/25FV12/25FV12A/25FV12C
4. Set both GON and BON items. Using and ;
set each to the following values. Leave RON set to “1”.
SERVICE RON 1
1: ON
0: OFF
R ON:ON (1)
G ON:OFF (0)
B ON:OFF (0)
5. Select the DCOL item and set it to “0”.
6. Connect an oscilloscope probe to CB Board, J701 pin
(KR) (RED OUT).
7. Select RDRV with
8. Adjust the value of RDRV with
and .
and for
92.0 ± 2 VDC.
90.2 ± 2 VDC
9. Reset the item DCOL to “1”.
10.Reset GON and BON values to “1”.
R ON:ON (1)
G ON:ON (1)
B ON:ON (1)
11. Reset Picture and Color to normal values:
PICTURE: MAX
COLOR:CENTER
12.Press
then to save into the memory.
Display Position Adjustment (DISP)
1. Input a color-bar signal.
2. Set to Service Adjustment Mode.
3. Select DISP with
and .
4. Adjust values of DISP with and to adjust characters
to the center.
5. W rite to memory by pressing
then .
6. Check to see if the text is displayed on the screen.
SERVICE DISP 15
Sub Bright Adjustment (SBRT)
1. Input a monoscope signal.
2. Activate the Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Select the SBR T item with
and .
5. Adjust the values of SBRT with and to obtain a faintly
visible crosshatch.
6. Press
then to save into the memory.
Sub Hue, Sub Color Adjustment (SHUE, SCOL)
1. Input a color-bar signal and set level to 75%.
2. Activate the Service Adjustment Mode.
3. Select the DCOL item and set the value to “0”.
4. Connect an oscilloscope probe to CB Board, CN705
(Blue Out).
Pin
5. Select the SHUE and SCOL item with
and .
6. While showing the SHUE item, adjust the waveform with
and until the second and third bars show the same level
(V2 = V3 < 0.1 Vp-p).
7. While showing the SCOL item, adjust the waveform with
and until the first and fourth bars show the same level (V1
= V4 < 0.1 Vp-p).
8. Input RF P AL-M and PAL-N color-bar and repeat steps 1-7
for each. (KV -25FV12A ONL Y).
V2 V3
V1
V4
8. Select the DCOL item and reset to 1.
9. Press
then to save into the memory.
V. Size Adjustment (VSIZ)
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the VSIZ item with
4. Adjust value of VPOS with
and .
and for the best vertical
center.
5. Press
then to save into the memory.
V. Center Adjustment (VPOS)
Perform this adjustment after performing H. Frequency
(Free Run) Check.
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the VPOS item with
4. Adjust value of VPOS with
center.
5. Press
then to save into the memory.
and .
and for the best vertical
— 24 —
Page 25
KV-24FV12/25FV12/25FV12A/25FV12C
SERVICE READ
Green
Red
ENTER
0
H. Center Adjustment (HPOS)
Perform this adjustment after performing H. Frequency
(Free Run) Check.
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the HPOS item with
4. Adjust the value of HPOS with
and .
and for the best
horizontal center.5.Press then
to save into the memory.
H. Size Adjustment (HSIZ)
1. Input a monoscope signal.
2. Activate the Service Adjustment Mode.
3. Select HSIZ with
4. Adjust with
5. Press
and .
and for the best horizontal size.
then to save into the memory.
V. Angle (VANG), V. Bow (VBOW), Upper pin
(UPIN) and Low Pin (LPIN) Adjustments
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select VANG, VBOW, UPIN, and LPIN with
4. Adjust with
5. Press
V ANGLE (VANG)
V BOW (VBOW)
UPPER PIN (UPIN)
LOW PIN (LPIN)
and for the best picture.
then to save into the memory.
and .
V. Linearity (VLIN), V. Correction (VSCO),
Pin Amp (PAMP), and Horizontal Trapezoid
(TRAP) Adjustments
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select VLIN, VSCO, P AMP , and PPHA with
4. Adjust with
5. Press
V LINEARITY (VLIN)
V CORRECTION (VSCO)
PIN AMP (PAMP)
and for the best horizontal size.
then to save into the memory.
and .
Service Adjustment Mode Memory
1. Change the value of the DCOL item to “1”.
2. After completing all adjustments, press
Read From Memory
then .
HORIZONT AL TRAPEZOID (TRAP)
— 25 —
Page 26
KV-24FV12/25FV12/25FV12A/25FV12C
NOTES:
— 26 —
Page 27
6.1 BLOCK DIAGRAM
L
0
5
5
J
2
J
2
0
5
J
2
0
0
5
J
2
F
I
R
/
V
A
F
I
R
/
V
A
F
I
R
/
V
A
F
I
R
/
V
A
U
U
A
A
B
B
C
C
R
R
Y
Y
C
C
U
U
A
A
B
C
B
R
C
R
Y
C
Y
C
U
T
U
T
N
P
N
P
I
I
I
U
T
U
T
N
P
N
P
I
S
S
S
S
2
0
2
J
0
2
J
2
0
2
2
J
0
2
2
J
/
/
A
A
O
N
O
T
N
T
F
R
F
R
/
/
A
A
O
N
O
T
N
T
F
R
F
R
T
T
)
)
P
P
U
U
(
(
I
I
N
N
T
)
P
U
(
I
N
T
)
P
U
(
I
N
D
G
G
D
D
G
G
D
L
L
L
X
X
X
X
U
D
I
A
O
O
U
D
I
A
O
U
D
I
A
O
U
D
I
A
I
I
O
O
D
D
I
O
I
O
D
D
R
R
R
R
S
S
S
S
C
C
C
C
4
3
4
3
4
3
4
3
1
2
1
2
1
2
1
0
1
0
1
J
2
J
2
0
1
0
1
J
2
J
2
V
I
D
-
E
E
O
O
V
I
D
E
O
V
I
D
-
E
O
V
I
D
-
V
V
V
V
U
U
A
A
U
U
A
A
C
C
C
C
2
V
V
V
V
L
L
L
L
R
R
R
R
O
D
E
V
I
O
D
E
V
I
O
D
E
V
I
O
D
E
V
I
L
L
L
L
O
O
D
I
D
I
O
O
D
I
D
I
R
R
R
R
0
T
U
1
1
1
0
T
U
1
1
0
T
U
1
0
T
U
1
1
V
9
V
9
V
9
V
9
V
3
0
V
3
0
V
V
3
0
3
0
V
5
V
5
V
5
V
5
A
T
D
D
A
A
A
T
A
T
D
D
A
A
A
T
C
C
K
C
K
L
O
L
O
C
C
C
K
C
K
L
O
L
O
C
U
T
U
T
-
O
O
D
D
E
M
E
M
E
-
E
U
T
U
T
-
O
O
D
D
E
M
E
M
E
-
E
O
F
N
O
N
O
M
O
M
F
O
F
N
O
N
O
M
O
M
F
M
E
O
D
O
D
M
E
O
D
M
E
M
E
O
D
D
A
L
E
L
E
P
P
D
S
A
S
D
A
L
E
L
E
P
P
D
S
A
S
L
S
E
D
E
D
T
T
L
S
L
S
E
D
E
D
T
T
L
S
E
O
E
O
D
D
V
I
I
V
E
O
E
O
D
D
V
I
I
V
T
E
O
U
O
U
T
-
T
-
T
D
E
D
T
E
O
U
O
U
T
-
T
-
T
D
E
D
T
F
O
U
O
U
T
T
T
A
F
A
T
F
O
U
O
U
T
T
T
A
F
A
A
R
G
C
G
C
F
F
A
R
A
R
G
C
G
C
F
F
A
R
L
U
T
U
T
O
O
L
L
U
T
U
T
O
O
L
R
U
T
U
T
O
O
R
R
U
T
U
T
O
O
R
U
T
M
M
E
E
U
T
U
T
M
M
E
E
U
T
6
0
C
1
1
N
N
6
0
C
1
N
6
0
C
6
0
C
1
N
2
P
2
P
2
P
2
P
I
N
:
I
I
M
M
I
N
:
I
M
I
N
:
I
N
:
I
M
C
D
G
D
G
C
2
2
D
G
C
C
D
G
2
2
D
G
C
C
D
G
D
G
C
C
D
G
1
1
1
1
C
N
N
I
I
A
C
A
C
N
N
I
I
A
C
A
C
C
N
N
I
I
C
A
C
A
N
N
I
I
C
A
C
A
K
K
K
K
KV-24FV12/25FV12/25FV12A/25FV12C
SECTION 6
DIAGRAMS
0
4
5
4
5
C
N
C
N
0
0
4
6
4
6
C
N
C
N
0
0
4
6
4
6
C
N
C
N
N
-
M
O
L
L
N
-
M
O
1
1
L
N
-
M
O
L
N
-
M
O
1
1
R
N
-
M
O
R
N
-
M
O
2
2
R
N
-
M
O
R
N
-
M
O
2
Y
P
L
U
P
Y
W
S
P
L
E
R
U
P
S
E
R
W
O
P
O
P
Y
P
L
U
P
S
E
R
W
Y
P
L
U
P
S
E
R
W
O
P
O
P
I
O
C
T
N
L
E
E
F
N
D
I
O
C
T
L
E
E
F
D
N
I
O
C
T
L
E
E
F
D
N
I
O
C
T
L
E
E
F
D
F
R
/
I
N
N
E
E
F
T
T
U
U
R
/
I
F
F
R
/
R
I
/
I
N
E
N
E
T
U
T
U
O
O
D
I
D
I
A
U
A
U
O
O
D
I
D
I
A
U
A
U
S
S
M
T
M
T
S
S
M
T
M
T
Y
Y
Y
Y
V
9
V
9
V
9
V
9
V
3
0
V
3
0
V
V
3
0
3
0
V
5
V
5
V
5
V
5
C
G
C
A
G
A
C
G
C
A
G
A
1
0
1
Q
1
0
1
Q
1
0
1
Q
1
0
1
Q
2
2
6
D
2
2
6
D
2
2
6
D
2
2
6
D
F
-
L
0
6
B
S
4
D
F
-
L
0
6
B
S
4
D
F
-
L
0
6
B
S
4
D
F
-
L
0
6
B
S
4
D
T
C
E
R
C
A
T
C
E
R
C
A
T
C
E
R
C
A
T
C
E
R
C
A
A
C
A
C
A
A
1
0
6
Y
R
1
0
6
Y
R
1
0
1
6
0
Y
6
R
Y
R
Y
A
L
E
R
C
G
D
Y
A
L
E
R
C
G
D
Y
A
L
E
R
C
G
D
Y
A
L
E
R
C
G
D
R
E
V
I
R
D
C
G
D
R
E
V
I
R
D
C
G
D
R
E
V
I
R
D
C
G
D
R
E
V
I
R
D
C
G
D
9
0
6
Q
9
0
6
Q
9
0
6
Q
9
0
6
Q
C
A
C
A
C
A
C
A
0
1
N
9
9
C
0
1
N
9
C
0
1
N
0
1
N
9
A
C
A
C
1
1
A
C
A
C
1
1
A
C
A
C
2
2
A
C
A
C
2
2
C
A
(
C
A
(
C
A
(
C
A
(
A
1
2
F
V
A
2
5
1
V
2
-
F
V
2
5
V
A
1
2
F
V
A
2
5
1
V
2
-
F
V
2
5
V
-
V
2
1
V
2
1
V
2
1
V
2
1
2
0
6
T
2
0
6
T
2
0
2
6
0
T
6
T
1
0
1
6
0
F
6
F
1
0
1
6
0
F
6
F
1
2
1
2
1
2
1
2
1
0
6
R
D
1
V
0
6
R
D
V
1
0
6
R
D
V
1
0
6
R
D
V
1
0
9
S
1
0
9
S
1
0
9
1
S
0
9
S
E
W
O
P
E
W
O
P
E
W
O
P
E
W
O
P
E
W
O
P
E
W
O
P
E
W
O
P
E
W
O
P
L
Y
L
Y
O
N
O
N
L
Y
L
Y
O
N
O
N
3
4
3
4
3
4
3
4
R
R
R
R
9
0
N
C
N
2
2
9
0
C
9
0
N
C
N
2
2
9
0
C
A
C
C
A
C
A
C
A
1
1
1
1
A
C
C
A
C
A
A
2
C
2
2
2
)
R
)
R
)
R
)
R
A
S
S
T
T
S
T
A
S
T
R
T
E
T
E
E
R
E
R
R
O
N
O
V
N
V
C
C
R
T
E
T
E
E
R
E
R
R
O
N
O
V
N
V
C
C
5
0
5
Q
Q
6
0
6
5
0
5
Q
Q
6
0
6
T
E
C
E
C
O
T
O
T
T
P
R
P
R
T
E
C
E
C
O
T
O
T
T
P
R
P
R
6
0
6
Q
Q
6
0
6
6
0
6
Q
Q
6
0
6
2
0
6
Y
R
2
0
6
Y
R
2
0
2
6
0
Y
6
R
Y
R
Y
A
Y
L
A
E
L
R
E
R
Y
A
Y
L
A
E
L
R
E
R
R
E
W
O
P
C
R
E
W
O
P
R
E
W
O
P
R
E
W
O
P
C
4
D
4
D
4
D
4
D
A
A
A
A
T
I
U
I
Y
I
R
R
C
D
C
B
T
C
C
I
N
N
U
Y
D
B
A
I
R
C
T
T
I
C
I
U
N
I
U
Y
Y
R
C
D
B
D
B
C
N
A
3
2
6
D
3
2
6
D
3
2
6
D
3
2
6
D
I
H
H
S
S
T
C
T
C
W
I
W
I
H
H
S
S
T
C
T
C
W
I
W
8
6
0
Q
8
6
0
Q
8
6
0
Q
8
6
0
Q
Y
R
R
I
I
S
T
T
D
D
B
B
Y
S
Y
R
I
R
I
T
S
T
D
D
B
Y
B
S
7
7
6
0
6
0
Q
Q
7
7
6
0
6
0
Q
Q
N
C
O
N
C
O
N
C
O
N
C
O
I
I
I
I
5
0
6
D
5
0
6
D
5
0
5
6
0
D
6
D
F
-
L
0
6
B
S
F
-
L
0
6
B
S
F
-
L
0
6
B
S
F
-
L
0
6
B
S
T
C
E
R
T
C
C
E
R
C
T
C
T
E
C
R
E
R
C
C
0
4
6
T
0
4
6
T
0
4
6
T
0
4
6
T
R
T
R
T
S
S
R
T
S
R
T
S
B
Y
N
D
A
S
T
:
B
Y
D
N
T
A
S
:
B
Y
D
N
T
A
S
:
B
Y
N
D
A
S
T
:
1
1
1
1
3
3
3
3
4
4
4
4
5
5
5
5
6
6
6
6
V
V
E
E
V
E
V
E
R
T
E
E
R
R
V
T
E
E
R
V
R
T
E
E
R
R
V
T
E
E
R
V
0
1
C
6
0
1
C
6
0
1
C
6
0
1
C
6
I
V
I
V
I
V
I
V
/
O
C
F
B
F
B
P
P
/
O
C
F
B
/
P
/
O
C
O
C
F
B
P
6
2
6
2
6
D
6
D
6
2
6
2
6
D
6
D
9
9
9
9
6
3
6
6
C
6
C
3
6
3
6
6
C
6
C
3
8
8
8
8
T
5
0
0
T
5
0
T
5
T
5
0
1
1
1
1
2
2
2
2
E
V
I
R
D
H
E
V
I
R
D
H
E
V
I
R
D
H
E
V
I
R
D
H
3
3
3
3
1
0
5
Q
1
0
5
Q
1
0
5
Q
1
0
5
0
3
T
6
0
6
3
T
6
0
3
0
3
T
T
6
1
1
8
1
8
1
8
1
1
1
8
1
6
1
6
5
5
1
6
5
1
6
1
5
5
1
5
4
4
1
5
4
1
5
1
4
3
3
3
D
D
D
D
N
N
N
N
S
S
S
S
3
2
2
2
2
8
8
8
8
7
7
7
7
9
9
9
9
0
6
0
H
P
0
6
0
P
H
0
6
0
P
H
0
6
0
H
P
R
L
E
P
O
U
C
T
O
O
P
H
R
L
E
P
O
U
C
T
O
O
P
H
R
L
E
P
O
U
C
T
O
O
P
H
R
L
E
P
O
U
C
T
O
O
P
H
1
1
4
4
1
1
4
4
2
2
3
3
2
2
3
3
B
+
B
+
B
+
B
+
B
+
B
+
B
+
B
7
1
7
1
7
1
7
1
3
1
3
1
3
1
3
1
4
1
4
1
4
1
4
1
2
1
2
1
2
1
2
1
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
R
R
O
E
R
R
R
O
E
R
R
R
O
E
R
R
R
O
E
R
6
0
I
C
6
0
I
C
6
0
I
C
6
0
I
C
+
T
C
E
R
T
C
E
R
T
C
E
R
T
C
E
R
B
W
O
L
B
W
O
B
L
W
O
L
B
W
O
L
B
W
O
L
B
W
B
O
L
W
O
L
B
W
O
L
T
C
E
T
C
R
E
R
T
C
E
T
R
C
E
R
O
I
D
U
A
O
I
D
U
A
O
I
D
U
A
O
I
D
U
A
O
I
D
U
A
O
I
D
U
A
O
I
D
U
A
O
I
D
U
A
T
C
E
R
T
C
E
R
C
C
V
C
C
V
T
C
E
R
T
C
E
R
C
C
V
C
C
V
5
4
5
6
4
R
6
R
5
4
6
R
5
4
6
R
k
0
k
1
0
1
k
0
k
1
0
1
P
A
M
P
A
M
P
A
M
P
A
M
+
B
+
B
+
B
+
B
2
2
2
2
G
E
R
G
5
V
E
R
5
V
G
E
R
G
5
V
E
R
5
V
V
2
1
V
2
1
V
2
1
V
2
1
0
4
C
6
I
0
4
C
6
I
0
4
C
6
I
0
4
C
6
I
Q
T
O
U
V
T
O
U
V
T
O
U
V
T
O
U
V
P
T
P
T
P
T
P
T
2
5
0
I
C
2
5
0
I
C
2
5
0
I
C
2
5
0
I
C
T
F
U
O
E
T
F
R
U
E
R
O
T
F
U
E
O
R
T
F
U
E
O
R
+
-
+
+
-
+
E
E
E
E
E
E
E
E
V
V
V
V
V
V
V
V
I
I
I
I
I
I
I
I
R
R
R
R
R
R
R
R
D
D
D
D
D
D
D
D
G
R
E
V
G
9
R
E
V
9
G
R
E
V
G
9
R
E
V
9
V
2
V
V
1
5
2
V
1
5
V
2
V
1
5
V
5
V
2
1
0
3
C
6
I
0
3
C
6
I
0
3
C
6
I
0
3
C
6
I
L
R
T
C
-
L
O
V
L
R
T
C
-
L
O
V
L
R
T
C
-
L
O
V
L
R
T
C
-
L
O
V
0
1
4
Q
0
1
4
Q
0
1
4
Q
0
1
4
Q
1
1
1
1
4
4
4
4
T
U
O
H
T
U
O
H
T
U
O
H
T
U
O
H
6
6
6
6
2
0
2
5
0
Q
5
Q
2
0
5
Q
2
0
5
Q
D
O
L
H
D
V
O
L
H
V
D
O
L
H
D
V
O
L
H
V
1
+
N
I
1
+
N
I
1
+
N
1
I
+
N
I
R
L
N
T
C
R
L
N
T
C
R
L
N
T
C
R
L
N
T
C
2
T
U
O
2
T
U
O
2
T
U
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— 28 —— 27 —
Page 28
KV-24FV12/25FV12/25FV12A/25FV12C
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)
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H
)
Y
(
-
D
D
H
)
)
Y
(
+
D
H
(
+
D
Y
H
)
)
(
Y
+
D
Y
(
H
+
D
H
E
— 30 —— 29 —
Page 29
KV-24FV12/25FV12/25FV12A/25FV12C
TDA8580Q/N1
V
P1
3
IN 1
7
V
P2
15
IN 2
8
+
-
+
-
60
k
60
k
V/l
V/l
+
-
OA
+
-
OA
OUT 1 +
OUT 2 -
1
4
45 k
45 k
V
px
30 k
BUFFER
IN 4
IN 5
12
+
-
60
k
60
k
V/l
+
-
OA
+
-
OA
OUT 3 -
OUT 4 +
14
17
45 k
45 k
11
BUFFER
BUFFER
45
k
45
k
V
px
+
-
V/l
MUTE
13
STANDBY
5
DIAG
6
DIAGNOSTIC
INTERFACE
IN 3
10
PGND1
2
PGND2
16
9
6.2 CIRCUIT BOARD LOCATIONS
VB Board
(KV-25FV12A
K Board
MB Board
A Board
6-3. PRINTED WIRING BO ARDSAND
SCHEMATIC DIAGRAMS
• All capacitors are in µF unless otherwise noted.
pF: µµF 50 WV or less are not indicated except for
electrolytic and tantalums.
• All electrolytics are 50V unless otherwise specified.
• Indication of resistance, which does not have one for
rating electrical power, is as f ollows:
Pitch: 5mm
Rating electrical power 1/4W (CHIP: 1/10W)
• All resistors are in ohms.
KΩ = 1000Ω MΩ = 1000KΩ
•
•: fusible resistor
•
•: panel designation and adjustment for repair
•: earth-ground
•
• All variable and adjustable resistors have characteristic
• The components identified by
: nonflammable resistor
: internal component
: earth-chassis
curve B, unless otherwise noted.
been carefully factory-selected for each set in order to
satisfy regulations regarding X-ray radiation. Should
replacement
be required, replace only with the value originally used.
• When replacing components identified by
necessary adjustments indicated. If results do not meet
the specified value, change the component identified
by
and repeat the adjustment until the specified value
is achieved (refer to Safety Related Adjustments on
page 19).
• When replacing parts shown in the table below, be sure
to perform the related adjustments.
The components identified by shading and mark
are critical for safety. Replace only with the part
number specified.
The symbol (displayed on component side of
the circuit board) indicates fast operating fuse.
Replace only with fuse of the same rating as marked.
Les composants identifiés per un tramé et une
marque sont critiques pour la sécurité. Ne les
remplacer que par une piéce portant le numéro
spécifié. Le symbole indique une fusible a
action rapide. Doit etre remplacee par une fusible de
meme yaleur, comme marque.
17*A-1342-547-A VB (VAR) MOUNTED PC BOARD
181-792-874-11CORD, POWER (WITH CONNECTOR)
19*A-1380-629-A K (VAR) MOUNTED PC BOARD
201-766-374-11PLUG, F-PIN
211-529-640-11SPEAKER (13X8CM)
278-598-431-30TUNER, FSS BTF-WA411
284-062-047-01PIECE A(110), CONV CORRECT
291-452-032-00MAGNET,DISC
301-453-336-11FBT A SS Y NX -4011//X4A431-33
311-251-642-52HV CAP ASSY
321-900-800-65FOCUS LEAD
331-900-803-22G2 LEAD
341-500-586-11FILTER, CLAMP (FERRITE CORE)
Page 37
Note:Note:
The components identified by shading and mark
are critical for safety. Replace only with part number
specified.
Les composants identifies per un trame et une marque
1X-4037-467-2BEZNET ASSY2-6
24-046-160-01EMBLEM (NO.9), SONY
34-068-307-04BUTTON, MULTI
44-068-308-11GUIDE, L ED
54-068-309-04BUTTON, FUNCTION
64-068-306-03DOOR
74-057-714-01PIECE ASSY, TLH CORRECTION
81-452-896-11COIL, NA ROTATION (RT200)
98-733-250-05CRT 2 5RSN
104-053-005-01SPACER, DY
111-451-475-11DEFLECTION YOKE (Y25RSA)
12*A-1332-057-A CB (VAR) MOUNTED PC BOARD
13*A-1299-205-A A COMPLETE PC BOARD
The high-voltage leads associated with the FBT on this board
are not included and must be ordered separately. (See 34-36)
144-036-329-01SPRING (B), TENSION
151-419-510-11COIL, DEGAUSSING
16*A-1304-192-A MB (VAR) MOUNTED PC BOARD
17*A-1342-547-A VB (VAR) MOUNTED PC BOARD
181-783-838-31CORD, POWER (WITH CONNECTOR)
19*A-1380-629-A K (VAR) MOUNTED PC BOARD
201-766-374-11PLUG, F-PIN
211-529-640-11SPEAKER (13X8CM)
224-374-745-31CUSHION (A)
23*4-068-305-01BOX, SPEAKER
244-075-094-01COVER, REAR
254-041-203-71HOLDER, HV CABLE
264-052-635-01MAIN POWER BRACKET
27*A-1372-117-A MOUNTED PWB, HZ
284-069-764-02BUTTON, MAIN POWER
284-062-047-01PIECE A(110), CONV CORRECT
291-452-032-00MAGNET,DISC
301-453-336-11FBT ASSY NX-4011//X4A431-33
311-251-642-52HV CAP ASSY
321-900-800-65FOCUS LEAD
331-900-803-22G2 LEAD
— 52 —
Page 39
SECTION 8
ELECTRICAL PARTS LIST
KV-24FV12/25FV12/25FV12A/25FV12C
Note:
The components identified by shading
and mark
only with part number specified.
Note:
Les composants identifies per un trame
et une marque
securite. Ne les remplacer que par une
piece portant le numero specifie.
• The components identified by
manual have been carefully factoryselected for each set in order to satisfy
regulations regarding X-ray radiation.
Should replacement be required, replace
only with the value originally used.
• Items marked * are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
• All variable and adjustable resistors have
characteristic curve B, unless otherwise
noted.
in this
RESISTORS
• All resistors are in ohms
• F : nonflammable
When indicating parts by reference
number, please include the board name.
*A-1299-203-AA COMPLETE PC BOARD (KV-24FV12 ONLY)
*A-1299-205-AA C O M PLETE PC BOARD (KV-25FV12A ONLY)
*A-1299-223-AA COMPLETE PC BOARD (KV-25FV12/25FV12C ONLY)
The high voltage leads associated with the FBT on this board are not
included and must be ordered separately. Order the following leads
when requesting this A Board:
The components identified by shading
and mark
Replace only with part number specified.
are critical for safety.
The components identified by
carefully factory-selected for each set in order to satisfy
regulations regarding x-ray radiation. Should replacement
be required, replace only with the value originally used.