Sony KV-14FM12 Schematic
SERVICE MANUAL
MODEL COMMANDER DEST CHASSIS NO.
BA-5 CHASSIS
KV -13FM12
KV -13FM12
KV -13FM13
KV -13FM14
KV -14FM12
KV-14FM12A
KV -14FM12C
KV -14FM14
RM-Y172 US SCC-S40H-A
RM-Y172 CND SCC-S41H-A
RM-Y172 US SCC-S40L-A
RM-Y172 US SCC-S40J-A
RM-Y172 E SCC-S38M-A
RM-Y172 E SCC-S38N-A
RM-Y172 E SCC-S38P-A
RM-Y172 E SCC-S38S-A
RM-Y172KV-14FM12A
TRINITRON® COLOR TV
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
SPECIFICATIONS
KV-13FM12
KV-13FM13
KV-13FM14
Power requirements 120V, 60Hz 120-220V, 50/60Hz
Number of inputs/outputs
Speaker output(W) 3W 3W
Power Consumption(W)
Dimensions(W/H/D)
Mass
1)
Video
2)
Audio
Headphone Out 1 1
In use(Max) 80W 85W
In standby 1W 1W
(mm)
(in)
(kg) 12 kg 12 kg
(lbs) 26 lbs. 7 oz. 26 lbs. 7 oz.
450 x 338 x 438 mm 450 x 338 x 438 mm
22
22
3/4
3/8
17
x 13
x 17
1/4
KV-14FM12
KV-14FM12A
KV-14FM12C
KV-14FM14
3/4
17
x 13
3/8
1/4
x 17
1) 1 Vp-p 75 ohms unbalanced, sync negative
2) 500mVrms (100% modulation), impedance: 47kilohms
Television system
American TV standard/NTSC
P AL M, N (KV -14FM12A ONLY)
Channel coverage
VHF:2-13/UHF:14-69/CATV:1-125
Visible screen size
13” picture measured diagonally
Actual screen size
14” picture measured diagonally
Antenna
75 ohm external antenna terminal for VHF/UHF
Supplied accessories
Remote Commander RM-Y172
Size AA (R6) batteries (2)
Design and specifications are subject to change without notice.
— 2 —
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
TABLE OF CONTENTS
Section Title Page
Warnings and Cautions ................................................................................................................................................................ 4
Self-Diagnostic Function .............................................................................................................................................................. 4
Safety Check-Out Instructions ......................................................................................................................................................7
1. GENERAL ............................................................................................................................................................8
2. DISASSEMBLY
2-1. Rear Cover Removal ......................................................................................................................................................13
2-2. Chassis Assembly Removal ........................................................................................................................................... 13
2-3. Service Position ............................................................................................................................................................. 13
2-4. Picture Tube Removal .................................................................................................................................................... 14
3. SET-UP ADJUSTMENTS
3-1. Beam Landing ................................................................................................................................................................ 15
3-2. Convergence .................................................................................................................................................................. 16
3-3. Focus .............................................................................................................................................................................17
3-4. Screen (G2) ................................................................................................................................................................... 17
3-5. Method of Setting the Service Adjustment Mode.............................................................................................................18
3-6. White Balance Adjustment s ........................................................................................................................................... 18
4. SAFETY RELATED ADJUSTMENTS
4-1. R564 Confirmation Method (HV Hold-Down Confirmation and Readjustments).........................................................19
4-2. B+ Volt age Confirmation and Adjustment........................................................................................................................ 19
5. CIRCUIT ADJUSTMENTS
5-1. Setting the Service Adjustment Mode ............................................................................................................................. 21
5-2. Memory Write Confirmation Method ............................................................................................................................... 21
5-3. Adjustment Buttons and Indicators ................................................................................................................................. 21
5-4. MB Board Adjustments...................................................................................................................................................24
6. DIAGRAMS
6-1. Block Diagram................................................................................................................................................................ 27
6-2. Circuit Board Location .................................................................................................................................................... 31
6-3. Printed Wiring Boards and Schematic Diagrams............................................................................................................ 31
• A Board ..................................................................................................................................................................... 32
• MB Board .................................................................................................................................................................. 39
• CB Board .................................................................................................................................................................. 45
• HC Board .................................................................................................................................................................. 47
• HZ Board................................................................................................................................................................... 47
• HD Board .................................................................................................................................................................. 48
6-4. Semiconductors ............................................................................................................................................................. 49
7. EXPLODED VIEW
7-1. Chassis (KV-14FM12/14FM12C/14FM14 ONL Y)..........................................................................................................50
7-2. Chassis (KV-13FM12/13FM13/13FM14 ONL Y) ............................................................................................................. 51
7-3. Chassis (KV-14FM12A ONL Y)....................................................................................................................................... 52
8. ELECTRICAL PARTS LIST.................................................................................................................................................53
— 3 —
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
W ARNINGS 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 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. CIRCUIT ADJUSTMENTS THAT
ARE CRITICAL FOR SAFE OPERA TION ARE IDENTIFIED
IN THIS MANUAL. FOLLOW THESE PROCEDURES
WHENEVER CRITICAL COMPONENTS ARE REPLACED
OR IMPROPER OPERA TION 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'IMPORT ANCE 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
MAUVAIS 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 ST ANDBY/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”.
Diagnostic Item
Description
Power does not turn on Does not light
+B overcurrent (OCP)* 2 times 2:0 or 2:1 • H.OUT (Q502) is shorted. (A Board)
I-Prot* 4 times 4:0 or 4:1 • +13V is not supplied. (A Board)
IK 5 times 5:0 or 5:1 • Video OUT (IC502) is faulty. (A Board)
No. of Times
STANDBY/TIMER
LED Flashes
Self-diagnostic Display/
Diagnostic Result
Probable Cause
Location
• Power cord is not plugged in.
• Fuse is burned out. (F601) (A Board)
• IC702 is shorted. (CB Board)
• IC502 is faulty. (A Board)
• IC1301 is faulty. (MB Board)
• Screen (G2) is improperly adjusted.**
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.
* 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.
** Refer to Screen (G2) Adjustments in Section 3-4 of this manual.
— 4 —
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
STANDBY/TIMER LED
Display of Standby/Timer LED Flash Count
2 times
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
Diagnostic Item Flash Count*
+B overcurrent 2 times
I-Prot 4 times
IK 5 times
*One flash count is not used for self-diagnostic.
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 ST ANDBY/TIMER LAMP from flashing.
LED OFF
3 sec.
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:
Display Channel
Self-Diagnostic Screen Display
SELF DIAGNOSTIC
2: 0
3: N/A 0
4: 0
5: 1
101: N/A 0
5
Sound volume
Power ON
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 —
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
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
T o clear the result display to “0”, press buttons on the Remote Commander sequentially when the diagnostic screen is displayed,
as shown below:
8
ENTERChannel
Quitting the Self-Diagnostic Screen
T o quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.
Self-Diagnostic Circuit
FROM
CB BOARD
CN705 PIN1
A BOARD
FROM
IC501
PIN 3
MB BOARD
IC1301
Y/CHROMA JUNGLE
IK IN
21
HP/PROTECT
18
SDA
A BOARD
IC502
V. OUT
3
REF
35
17
37
MB BOARD
IC1001
SYSTEM
I-PROT
IO-SDAT
IO-BDAT
O-LED
36
18
DISPLAY
MB BOARD
MEMORY
B-DAT
5
IC1003
+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-Prot Occurs 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.
IK If 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 —
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
Trouble Light
AC Outlet Box
Ohmmeter
Cold-water Pipe
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety 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 met al 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 Simp son’s 250 and
Sanwa SH-63TRD are examples of passive VOMs that
are suitable. Nearly all battery-operated digital
multimeters that have a 2 V AC 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 boxes 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 zero ohms. If a cold-water pipe is not
accessible, connect a 60- to 100-watt trouble- light (not a
neon lamp) between the hot side of the receptacle and the
retaining screw . Try both slot s, 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).
Figure B. Checking for earth ground.Figure A. Using an AC voltmeter to check AC leakage.
— 7 —
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.
(Optional connection)
From
cable/
VCR
2
1
3
antenna
Rear of TV
Coaxial
Cable
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-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
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
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
AUDIO and VIDEO OUT on your VCR to AUDIO/VIDEO IN 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 19).
✍
You can use the button to switch between the VHF/UHF and VIDEO
inputs.
3
4
(Optional connection)
Cable box
1
VCR
2
Rear of TV
From
cable
Coaxial
Cable
1
Coaxial
Cable
From
cable
Cable Box
— 9 —
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 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 your cable box) and use the cable box’s remote control to
change channels.
✍
If you will be controlling all channel selection through your cable box, you
should consider using the Channel Fix feature, (see page 19).
Coaxial
2
Cable
Rear of TV
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
5
TV and Satellite Receiver
8
TV, Satellite Receiver, and VCR
1 Connect the cable from your satellite antenna to SATELLITE IN on
your 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 to the
VHF/UHF jack on your TV.
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 your VCR to
AUDIO and VIDEO IN on your TV.
✍
To view from the satellite receiver or VCR, select the video input to which
your 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
SATELLITE IN
LINE OUT
AUDIO R AUDIO L VIDEO
3
VHF/UHF
IN
OUT
— 10 —
1
Satellite
antenna
cable
1
Connect the cable from your satellite antenna to SATELLITE IN on
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.
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
7
— 11 —
12
MENU Displays the on-screen menu.
Press again to exit the menu at
any time.
RESET Press to return to factory settings
while in an on-screen menu.
Using the Remote Control and
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
MUTING POWER
SLEEP
DISPLAYMTS/SAP
TV/VIDEO
1 2 3
4 5 6
7 8 9
JUMP
RESET MENU
0
VOL CH
TV
ENTER
RM-Y173
Button Description
POWER Press when you want to turn the
TV on and off.
MUTING Instantly turns off the sound.
Press again or pr ess to restore
sound.
TV/VIDEO Cycles through available video
inputs.
Moves the cursor in the on-
screen menus. Press the arrow
buttons to move the cursor . Press
the center button to select or
access an option.
SLEEP Turns the TV off au tomati ca lly i n
approximately 15, 30, 45, 60, or
90 minutes. Cancel by pressing
until SLEEP OFF appears.
MTS/SAP Cycles through the Multi-
channel TV Sound (MTS)
options: Stereo, Mono, and
Auto-SAP (Second Audio
Programming) (KV-21FE12
models only).
DISPLAY Press to display the current time,
(if set) and channel number.
JUMP Alternates between the last two
channels selected wit h th e
buttons.
0 9
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
✍
The remote control illustrated (RM-Y173) is for KV-21FE12 models. For
KV-21FM12 and KV-14FM12 models, your remote control does not have the
MTS/SAP button.
(Continued)
11
Other Information
25
Cannot receive
higher number
channels (UHF)
when using an
antenna
❏ Make sure Cable is set to OFF in the Options menu
under Setup (pag e 23).
❏ Perform Auto Program to add channels that are not
presently in the memory (page 23).
Cable stations
don’t seem to
work
❏ Make sure Cable is set to ON in the Options menu
under Setup (pag e 23).
❏ Perform Auto Program to add channels that are not
presently in the memory (page 23).
Remote control
does not
operate
❏ Batteries could be weak. Replac e them (page 2).
❏ Move the TV 3-4 feet or more away from fluorescent
lights.
The TV needs
to be cleaned
❏ Clean the TV with a soft dry cloth. Never use strong
solvents such as thinner or benzine, which might
damage the finish of the cabinet.
Troubleshooting
If you are having a problem with your TV, try the suggestio ns below. If
the problem persists, contact your nearest Sony dealer.
No picture, no
— 12 —
sound
Poor or no
picture, good
sound
Good picture,
no sound
No color ❏ Adjust Color in the Video menu (page 17).
No signal ❏ Check the Cable setting in the Options menu under
Dotted lines or
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 cord to restore the TV. If the problem
continues, call your local service center.
❏ Check the TV/VIDEO settings: whe n watching TV, set
to TV; when watch ing vi deo equipmen t, set t o VIDEO
(page 11).
❏ Make sure the batteries have been inserted correctly
into the remote control.
❏ Try another channel, it could be station trouble.
❏ Adjust Picture in the Video menu (page 17).
❏ Adjust Brightness in the Video menu (page17).
❏ Check the antenna and/or cable connections (page 3).
❏ Press
❏ Check your Audio settings. Your TV may be set to
❏ Check the antenna and/or cable connections (page 3).
❏ Make sure the channel selected is currently
❏ Adjust the antenna.
❏ Move the TV away from other electronic equipment.
❏ Check your outdoor antenna or call your cable service.
MUTING
screen (page 11).
Auto-SAP (page 18).
Setup (page 23).
broadcasting.
Some electronic equipment can create electrical noise,
which can interfere with TV reception.
so that MUTING disappears from the
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
24
2-1. REAR COVER REMOVAL
Screw +BVTP 4x16
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
SECTION 2
DISASSEMBLY
Screw +BVTP 4x16
Rear Cover
Screw +BVTP 4x16
2-2. CHASSIS ASSEMBL Y REMOVAL 2-3. SERVICE POSITION
HC
Board
HD
Board
CB Board
CB
Board
Screw +BVTP 4x16
MB Board
A Board
Claw
HZ Board
(KV-14FM12A
ONLY)
— 13 —
MB Board
Extension Cable for
Service p/n S-1294-965-A
A Board
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
2-4. PICTURE TUBE REMOVAL
WARNING:
BEFORE REMOVING
THE ANODE CAP
High voltage remains in the CR T
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
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 CRT grounding strap.
3. Remove the CB Board from the CRT.
4. Remove the chassis assembly.
5. Loosen the neck assembly fixing screw and remove.
10
8
6
5
9
7
1
2
3
4
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 CR T grounding strap and spring tension devices.
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 REMOV AL
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
Use your thumb to pull the rubber
a
.
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 —
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
SECTION 3
SET -UP ADJUSTMENTS
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: ST ANDARD
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
— 15 —
a
c
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
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 Convergence
1. Adjust V.STAT magnet to converge red, green and blue dots in
the center of the screen (V ertical movement adjust V.STAT R V
to converge).
R G B
Center dot
RV701 V.STAT
R
G
B
V.STAT magnet
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.STA T 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 —
KV-13FM12/13FM13/13FM14/14FM12/14FM12A/14FM12C/14FM14
ba
cd
a
b
d
a-d: screen-corner
misconvergence
c
BGR
RGB
BGR
R
G
B
B
G
R
RGB
RGB
G
B
R
B
G
R
BGR RGB
R
G
B
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.
Screen-Corner Convergence
1. Affix 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 SBR T, GCUT, BCUT in service mode with an
oscilloscope as shown below so that voltages on the red,
green, and blue cathodes are 170± 2 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.TIL T
(TL V VR). Perform adjustments while tracking items
1 and 2.
4. Observe the screen and adjust SCREEN (G2) VR in FBT
to obtain the faintly visible background of dot signal.
— 17 —
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