Sony KV-HA21M80 Service Manual
REVISION HISTORY
BG2T
CHASSIS
MODEL
KV-HA21M80
NO. SUFFIX DATE SUPP / CORR DESCRIPTION
1 -01 2002/10 _ _ 1st Issue
PA RT NO. : 9-872-344-01
SERVICE MANUAL
BG2T
CHASSIS
MODEL COMMANDER DEST. CHASSIS NO.
KV-HA21M80 RM-969 Pakistan
MODEL COMMANDER DEST. CHASSIS NO.
3
1
2
6
4
5
9
7
8
JUMP
-
0
SOUND
PROGR
2
MODE
SPACE
SOUND
TV
TRINITRON
®
COLOR TV
KV-HA21M80
RM-969
Power requirements 110-240 V AC, 50/60 Hz
Power consumption (W) Indicated on the rear of the TV
Television system B/G, I, D/K, M
Color system PAL, PAL 60, SECAM, NTSC3.58, NTSC4.43
Channel coverage
B/G VHF: E2 to E12
I UHF: B21 to B68
D/K VHF: C1 to C12, R1 to R12
M VHF: A2 to A13
8 (Antenna) 75-ohm external terminal
Audio output (Speaker) 5W + 5W
Number of terminal
D Video Input: 2* Output: 1 Phono jacks; 1 VP-P, 75 ohms * One input line available
9 Audio Input: 2* Output: 1 Phono jacks; 500 mVrms * One input line available
2 (Headphone) Output: 1 Stereo minijack
Picture tube 21 in.
Tube size (cm) 54 Measured diagonally
Screen size (cm) 51 Measured diagonally
Dimension (w/h/d, mm) 639 × 458 × 490
Mass (kg) 26
SPECIFICATIONS
Note
UHF: E21 to E69
CATV: S01 to S03, S01 to S41
CATV: S01 to S03, S1 to S41
UHF: C13 to C57, R21 to R60
CATV: S01 to S03, S1 to S41, Z1 to Z39
UHF: A14 to A79
CATV: A-8 to A-2, A to W+4, W+6 to W+84
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND
THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD,
OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE
ANODE.
Design and specifications are subject to change without notice.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON
THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
– 2 –
TABLE OF CONTENTS
KV-HA21M80
RM-969
Section Title Page
SELF DIAGNOSIS FUNCTION...................................... 4
1. GENERAL ................................................................. 7
2. DISASSEMBLY
2-1. Rear Cover Removal ............................................... 11
2-2. Speaker Removal .................................................... 11
2-3. Chassis Assy Removal ............................................ 11
2-4. Service Position ...................................................... 11
2-5. Terminal Bracket Removal ..................................... 11
2-6. Replacement Of Parts ............................................. 11
2-6-1. Replacement Of Light Guide ....................... 11
2-6-2. Replacement Of Power Button .................... 11
2-7. Picture Tube Removal ............................................. 12
3. SET-UP ADJUSTMENTS
3-1. Beam Landing ......................................................... 13
3-2. Convergence ............................................................ 14
3-3. Focus Adjustment.................................................... 16
3-4. G2 (SCREEN) and White Balance Adjustments ... 16
4. CIRCUIT ADJUSTMENTS
4-1. Adjustment With Commander ................................ 17
4-2. Adjustment Method ................................................ 17
4-3. Picture Quality Adjustment .................................... 23
4-4. Deflection Adjustment ............................................ 23
4-5. A Board Adjustment After IC003 (MEMORY)
Replacement ............................................................ 23
4-6. Picture Distortion Adjustment ................................ 24
Section Title Page
5. DIAGRAMS
5-1. Block Diagram ........................................................ 25
5-2. Circuit Boards Location .......................................... 27
5-3. Schematic Diagram ................................................. 28
(1) A Board Schematic Diagram ............................ 29
(3) CV Board Schematic Diagrams ........................ 31
5-4. Voltage Measurement ............................................. 32
5-5. Waveforms .............................................................. 35
5-6. Printed Wiring Boards and Parts Location ............. 36
5-7. Semiconductors ....................................................... 39
6. EXPLODED VIEWS
6-1. Picture Tube and Chassis ........................................ 41
7. ELECTRICAL PARTS LIST.................................... 42
– 3 –
KV-HA21M80
RM-969
SELF DIAGNOSIS FUNCTION
The units in this manual contain a self-diagnosis function. If an error occurs, the STANDBY (1) indicator will automatically begin to flash. A description of the self-diagnosis function is explained in the instruction manual.
The number of times the STANDBY (1) indicator flashes translates to a probable source of the problem. If an error
symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in
memory to reveal past problems and how often these problems occur.
1. DIAGNOSIS TEST INDICATORS
When an errors occurs, the STANDBY (1) indicator will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the indicator will identify the first of the problem areas.
Result for all of the following diagnosis items are displayed on screen. No error has occured if the screen displays a “0”.
Diagnosis
Item
Description
• Power does not
turn on
• +B overcurrent
(OCP)
• Horizontal
deflection
overdrive
• White balance
failure (no
PICTURE)
• Vertical deflection
stopped
• Micro reset
No. of times
STANDBY (1)
indicator flashes
Does not light
2 times
4 times
—
Self-diagnostic
display/Diagnosis
result
—
002:000 or
002:001~255
004:000 or
004:001~225
101:00 or
101:001~225
Probable
Cause
Location
• Power cord is not
plugged in.
• Fuse is burned out
F600 (F)
• H.OUT Q801 is shorted.
(A board)
• -13V is not supplied.
(A board)
• IC 551 faulty (A board)
• Discharge CRT
(C Board)
• Static discharge
• External noise
Detected
Symptoms
• Power does not come on.
• No power is supplied to
the TV.
• AC power supply is faulty.
• Power does not come on.
• Load on power line is
shorted.
• Has entered standby state
after horizontal raster.
• Power line is shorted or
power supply is stopped.
• Vertical deflection pulse
is stopped
• Power is shut down
shortly, after this return
back to normal.
• Detect Micro latch up.
Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.
The symptom that is diagnosed first by the microcontroller is displayed on the screen.
Note 2: Refer to screen (G2) Adjustment in section 3-4 of this manual.
– 4 –
2. DISPLAY OF STANDBY (1) INDICATOR FLASH COUNT
Diagnosis Item Flash Count*
2 times
+B overcurrent/overvoltage 2 times
KV-HA21M80
RM-969
4 times
Lamp ON 0.3 sec.
Lamp OFF 0.3 sec.
Lamp OFF 3 sec.
Vertical deflection stopped 4 times
* One flash count is not used for self-diagnosis.
STANDBY (1) indicator
3. STOPPING THE STANDBY (1) INDICATOR FLASH
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY (1)
indicator from flashing.
4. SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurances of failure for confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
[Screendisplay] / channel [5] / Sound volume [-] / Power ON
˘
Note that this differs from entering the service mode (volume [+]).
Self-Diagnostic screen display
SELF DIAGNOSTIC
002 : 000
004 : 000
101 : 000
Numeral "0" means that no fault has been detected.
– 5 –
KV-HA21M80
RM-969
5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY
Since the diagnosis 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-diagnosis function will not be able to detect subsequent faults after
completion of the repairs.
[Clearing the result display]
To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the selfdiagnostic screen is being displayed.
Channel [8] / 0
[Quitting Self-diagnostic screen]
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
6. SELF-DIAGNOSIS CIRCUIT
FROM
[+B] Q500
IC301
Y/CHROMA JUNGLE
MP/
50
PROTECT
8
SDA
[V]
D553
IC001
SYSTEM
11 DAT1 DAT
17
54
11 DAT0
53
IC003
MEMORY
5
[+Bovercurrent OCP ] Occurs when an overcurrent on the +B(135) line is detected by Q500. If Q500 go to
ON and the voltage to pin 50 of IC301 more than 3.5V when V.SYNC is more than
seven verticals in a period, the unit will automatically turn off.
[Verticaldeflectionstopped] Occurs when an absence of the vertical deflection pulse is detected by Pin 17 and
IC001 shut down the power supply.
[Whitebalancefailure] If the RGB levels* do not balance or become low level within 5 seconds, this error
will be detected by IC301. TV will stay on, but there will be no picture.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)
– 6 –
The operating instruction mentioned here are partial abstracts
!
!
PROGR
SELECT
(MONO)
L
R
L(MONO)R
6
1
372
584
9
qa
qs
0
from the Operating Instruction Manual. The page numbers of
the Operating Instruction Manual remain as in the manual.
KV-HA21M80
RM-969
SECTION 1
GENERAL
A Getting Started
Step 1
b
b
SELECT
PROGR
SELECT
Insert the batteries (supplied) into the remote.
Note
• Do not use old batteries nor use different types of batteries
together.
Step 2
Connect the antenna cable (not supplied) to 8
(antenna input) at the rear of the TV.
Tip
• You can also connect your TV to other optional components.
(See E)
Step 3
Plug in the power cord, then press ! on the TV to
turn it on.
Step 4
Press SELECT and PROGR + on the TV at the same time
for one to two seconds to preset the channels
automatically. (See J)
Tip
• To stop the automatic channel presetting, press SELECT.
Step 5
Press SELECT on the remote until “LANGUAGE/ :
ENGLISH” appears on the screen, then press + or – to
change the on-screen display language.
WARNING (continued)
Do not place any objects on the TV.
Install the TV on a stable TV stand and floor which
can support the TV set weight. Ensure that the TV
stand surface is flat and its area is larger than the
bottom area of the TV.
C
Securing the TV
Do not plug in too many appliances to the same
power socket. Do not damage the power cord.
Pull the power cord out by the plug. Do not pull
the power cord itself. Even if your TV is turned
off, it is still connected to the AC power source
(mains) as long as the power cord is plugged in.
Unplug the TV before moving it or if you are not
going to use it for several days.
B KV-HA21 only
To prevent the TV from falling, use the supplied screws, clamps and band to secure the TV
20 mm
screws
3.8 mm
clamps band
Screw the band to the TV stand and to the
provided hole at the rear of your TV.
or
(1) Put a cord or chain through the
clamps.
(2) Screw one clamp to a wall or pillar
and the other clamp to the provided
hole at the rear of your TV.
.
Note
• Use only the supplied screws. Use of other screws may damage the TV.
B
WARNING
• Dangerously high voltages are present inside the TV.
• TV operating voltage: 110 – 240 V AC.
• Do not plug in the power cord until you have completed making all other connections;
otherwise a minimum leakage current might flow through the antenna and other terminals to
ground.
• To avoid battery leakage and damage to the remote, remove the batteries from the remote if
you are not going to use it for several days. If any liquid that leaks from the batteries touches
you, immediately wash it away with water.
For your own safety, do not touch any part of the
TV, the power cord and the antenna cable during
lightning storms.
To prevent fire or shock hazard, do not expose
the TV to rain or moisture.
Do not block the ventilation openings of the TV.
Do not install the TV in a confined space, such
as a bookcase or built-in cabinet.
For children’s safety, do not leave children alone
with the TV. Do not allow children to climb onto
it.
Do not operate the TV if any liquid or solid object
falls into it. Have it checked immediately by
qualified personnel only.
Clean the TV with a dry and soft cloth. Do not use
benzine, thinner, or any other chemicals to clean
the TV. Do not scratch the picture tube.
D TV front and rear panels
TV rear panel
TV front panel
Button Function
1 ! Turn off or turn on the TV.
2 Remote control sensor.
3 1 Standby indicator.
3 Wake Up indicator.
4 PROGR +/– Select program number.
5 2 +/– * Adjust volume.
6 t Select TV or video input.
7 SELECT Select the desired item.
8 i Headphone terminal.
9, qa t Video input terminal.
0 8 Antenna input terminal.
qs T Monitor output terminal.
* You can also use the 2 +/– buttons on the TV to work as the +/– buttons on the remote.
Do not open the cabinet and the rear cover of the
TV as high voltages and other hazards are
present inside the TV. Refer servicing and
disposal of the TV to qualified personnel.
Your TV is recommended for home use only.
Do not use the TV in any vehicle or where it may
be subject to excessive dust, heat, moisture or
vibrations.
– 7 –
KV-HA21M80
RM-969
E Connecting optional components
Connecting to the video input terminal ( t )
TV front panel
(MONO)
R
L
Audio/Video cable
(not supplied)
TV rear panel
L(MONO)R
Note
• Do not connect video equipment to
the same time; otherwise the picture will not be displayed properly on the screen.
Antenna cable
(not supplied)
Audio/Video cable
(not supplied)
t (video input) at the front and the rear of your TV at
Connecting to the monitor output terminal ( T )
TV rear panel
Camcorder
Video game
equipment
VCR
G
Specifications
KV-HA21M80
Power requirements 110-240 V AC, 50/60 Hz
Power consumption (W)
Television system B/G, I, D/K, M
Color system PAL, PAL 60, SECAM, NTSC3.58, NTSC4.43
Channel coverage
B/G
I
D/K
M
8 (Antenna) 75-ohm external terminal
Audio output (Speaker)
Number of terminal
(Video) Input: 2* Output: 1 Phono jacks; 1 Vp-p, 75 ohms * One input line
(Audio)
i (Headphone) Output: 1 Stereo minijack
Picture tube 21 in. 14 in.
Tube size (cm) 54 37 Measured diagonally
Screen size (cm) 51 34 Measured diagonally
Dimensions (w/h/d, mm)
Mass (kg) 26 13
Design and specifications are subject to change without notice.
Indicated on the rear of the TV
VHF : E2 to E12
UHF : E21 to E69
CATV: S01 to S03, S1 to S41
UHF : B21 to B68
CATV: S01 to S03, S1 to S41
VHF : C1 to C12, R1 to R12
UHF : C13 to C57, R21 to R60
CATV: S01 to S03, S1 to S41, Z1 to Z39
VHF : A2 to A13
UHF : A14 to A79
CATV: A-8 to A-2, A to W+4, W+ 6 to W+84
5W + 5W 3W + 3W
Input: 2* Output: 1 Phono jacks; 500 mVrms * One input line
639 × 458 × 490 466 × 346 × 419
KV-HA14M80
Note
available
available
L(MONO)R
Audio/Video cable
(not supplied)
F Troubleshooting
If you find any problem while viewing your TV, please check the following
guide. If any problem persists, contact your Sony dealer.
Symptom Solutions
Snowy picture,
noisy sound
Good picture,
noisy sound
No picture, no sound
Good picture, no sound
Dotted lines or stripes
Double images or
“ghosts”
No color
Abnormal color
patches
The 1 (standby)
indicator on your TV
flashes red several
times after every
three seconds.
TV cabinet creaks.
A "boom" sound is
heard when the TV is
turned on.
• Check the antenna cable and connection on the TV, VCR and on the wall.
• Preset the channel manually again. (See J)
• Check the antenna setup. Contact a Sony dealer for advice.
• Select the appropriate TV system. (See J)
• Check the power cord, antenna and the VCR connections.
• Press ?/1 (power) or ! (main power) to turn on the TV.
• Press 2 + to increase the volume level.
• Press % to cancel the muting.
• Do not use a hair dryer or other equipment near the TV.
• Check the antenna setup. Contact a Sony dealer for advice.
• Use the fine tuning ("FINE") function. (See J)
• Turn off or disconnect the booster if it is in use.
• Check the antenna setup. Contact a Sony dealer for advice.
• Select the appropriate color system. (See J)
• Adjust the color level. (See K)
• Check the antenna setup. Contact a Sony dealer for advice.
•
Keep external speakers or other electrical equipment away from the TV.
Press ! (main power) to turn off the TV for about 15 minutes, then turn it
on again to demagnetize the TV.
• Count the number of times the 1 (standby) indicator flashes. Press !
(main power) to turn off your TV. Contact your nearest Sony service
center.
• Changes in room temperature sometimes make the TV cabinet expand or
contract, making a noise. This does not indicate a malfunction.
• The TV's demagnetizing function is working. This does not indicate a
malfunction.
Audio system
VCR
H
Remote control
0
qa
qs
qd
qf
qg
-
SOUND
MODE
3
1
2
6
4
5
9
7
8
JUMP
0
PROGR
2
qh
qj
qk
SPACE
SOUND
ql
TV
Button Function
1
?/1 Turn off temporarily or
1
2
a
2
3
JUMP Jump to previous
4
PROGR +/– Select program number.
5
2 +/–
6
SELECT Select the desired item.
7
PIC MODE Select picture mode.
3
9
+/– Adjust items.
4
0
5
qa
%
qd
t
6
qf
0 – 9, ÷ Input numbers.
7
Timer operations
qj
8
9
qk
qg
SOUND MODE Select sound mode.
ql
SPACE SOUND
qh
A/B
Teletext operations (green label)
8
x (red, green,
yellow, blue)
0
qs
qd
qh
qj
qk
turn on the TV.
Display the TV program.
program number.
Adjust volume.
Display on-screen
information.
Mute the sound.
Select TV or video input.
Set TV to turn on
automatically.
Set TV to turn off
automatically.
Select space sound mode.
Not function for your TV.
Not function for your TV.
See
K
I
I
K
K
–
–
–
–
–
–
–
–
–
–
–
–
–
– 8 –
KV-HA21M80
PICTURE COLOR BRIGHT HUE
BALANCE TREBLE BASS
SHARP
TV
1
2
3
4
6
7
8
9
-
0
5
JUMP
SOUND
MODE
PROGR
2
SPACE
SOUND
RM-969
I
Setting the timers
You can turn on and off your TV by using the and buttons respectively.
Setting the Wake Up timer
\/1
1
2
4
5
7
8
-
0
SOUND
PROGR
2
MODE
SPACE
SOUND
TV
Press until the desired period of time appears
1
on the screen.
3
WAKE UP TIMER:0H10M
6
(After 10 minutes)
9
JUMP
WAKE UP TIMER:OFF
(No Wake Up timer) (After 12 hours)
The Wake Up timer starts immediately after you
have set it.
Select the program number or video input you
2
want to wake up to.
Press \/1, or set the Sleep timer if you want
3
the TV to turn off automatically.
The
indicator on the TV lights up orange when
the TV goes into standby mode.
WAKE UP TIMER:12H00M
Setting the Sleep timer
Press until the desired period of time appears
on the screen.
SLEEP TIMER:30M SLEEP TIMER:60M
(After 30 minutes)
SLEEP TIMER:OFF SLEEP TIMER:90M
(No Sleep timer)
The Sleep timer starts immediately after you have
set it.
Notes
• You can also cancel the Wake Up and Sleep timers by turning off the TV’s main power.
• If no buttons or controls are pressed for more than two hours after the TV is turned on using
the Wake Up timer, the TV automatically goes into standby mode.
(After 60 minutes)
(After 90 minutes)
Presetting channels (continued)
To change the TV system setting
If the picture or sound is abnormal when receiving programs through the 8 (antenna
input) terminal
(1) Press SELECT until “TV SYS” appears on the screen.
(2) Press + or – to select the appropriate TV system until the picture or sound quality
is optimal.
B/G I D/K M
To change the color system setting
If the color is abnormal when receiving programs through the 8 (antenna input)
terminal or the t (video input) terminal
(1) Press SELECT until “COLOR SYS” appears on the screen.
(2) Press + or – to select the appropriate color system until the color is optimal.
AUTO PAL SECAM NTSC3.58 NTSC4.43
To skip program numbers
(1) Press PROGR +/– or the number buttons until the unused or unwanted program
number appears on the screen.
(2) Press SELECT until “MANUAL PROGRAM” appears on the screen.
(3) Press + or – once to enter the “MANUAL PROGRAM” mode.
(4) Press PIC MODE to skip the unused or unwanted program number.
(5) Press SELECT to exit the “MANUAL PROGRAM” mode.
Note
• To restore the skipped program number again, preset the channel automatically or manually.
To use the fine tuning function
The fine tuning (FINE) function may help to reduce the following problems:
double images and lines moving across the TV screen.
You can use the fine tuning function as below:
(1) Select the program number you want to adjust.
(2) Press SELECT until “MANUAL PROGRAM” appears on the screen.
(3) Press + or – once to enter the “MANUAL PROGRAM” mode.
to display “FINE” on the screen.
(4) Press
(5) Press + or – continuously until the above problems are minimized.
The + or – icon on the screen flashes while tuning.
(6) Press SELECT to exit the “MANUAL PROGRAM” mode.
J
Presetting channels
You can automatically preset up to 100 TV channels in numerical sequence
from program number 1, or manually preset desired channels and channels
that cannot be preset automatically.
Presetting channels automatically
from a specified program number
3
1
Number
buttons
+ or –
PIC MODE
SELECT
PROGR +/–
2
4
5
7
8
-
0
SOUND
2
MODE
SPACE
SOUND
TV
Press SELECT until “AUTO PROGRAM” appears
1
on the screen.
6
9
Press + or – once to enter the “AUTO
JUMP
2
PROGR
PROGRAM” mode.
The on-screen display will start flashing.
Press PROGR +/– or the number buttons until
3
the desired program number appears on the
screen.
Press + or – to start presetting channels
4
automatically.
Presetting channels manually
Press SELECT until “MANUAL PROGRAM”
1
appears on the screen.
Press + or – once to enter the “MANUAL
2
PROGRAM” mode.
Press PROGR +/– or the number buttons until
3
the desired program number appears on the
screen.
Press + or – until the desired channel picture
4
appears on the screen.
To preset other channels manually, repeat steps
5
3 to 4.
K
Customizing the picture and sound
You can customize the picture and sound by selecting the picture and sound
modes or by adjusting its settings.
You can change the sound effect by selecting the space sound mode.
Selecting the picture mode
Press PIC MODE to select the desired picture
mode.
Select To
“DYNAMIC” view high contrast pictures.
SOUND
MODE
SELECT
+ or –
SPACE
SOUND
PIC MODE
“STANDARD” view normal contrast pictures.
“SOFT” view mild pictures.
Selecting the sound mode
Press SOUND MODE to select the desired sound
mode.
Select To
“9 DYNAMIC” listen to dynamic and clear
“9 DRAMA” listen to sound that emphasizes
“9 SOFT” listen to soft sound.
sound that emphasizes the low
and high sound.
vocals and background music.
Adjusting the picture and sound settings
Press SELECT until the desired setting appears.
1
Each time you press SELECT, the setting item will change as follows:
Press + or – to adjust the item.
2
To adjust other items, repeat steps 1 to 2.
3
Notes
•“HUE” can be adjusted for the NTSC color system only.
• Reducing “SHARP” can also reduce picture noise.
– 9 –
KV-HA21M80
RM-969
Customizing the picture and sound (continued)
Selecting the space sound mode
Press SPACE SOUND.
Select To
“ON” listen to monaural sound with a stereo-like effect.
“OFF” turn off space sound mode.
Note
• You can also turn space sound on or off using the SELECT and + or – buttons.
– 10 –
2-1. REAR COVER REMOVAL
1 Eight screws
(+BVTP 4 × 16)
1 Two screws
(+BVTP 4 × 16)
2 Rear cover
1 Two screws washer head
2 Speaker
Bracket
3 Speaker
(+P 4 × 16)
A board
Terminal board bracket
One screw
(+BVTP 4 × 16)
One screw
(+BVTP 3 × 12)
1 Push the claw to direction
of arrow and remove
2 Spring compression
3 Power Button
– 11 –
SECTION 2
DISASSEMBLY
2-2. SPEAKER REMOVAL
2-3. CHASSIS ASSY REMOVAL
2-4. SERVICE POSITION
Caution:
standing position.
Note:
placing the chassis into Service Position.
Do not take out CRT support block while TV set in
Undress necessary wires that creates tension while
2-5. TERMINAL BRACKET REMOVAL
2-6. REPLACEMENT OF PARTS
For replacements of light guide,unscrew them,
exchange with new parts and fix them with
screws respectively.
2-6-1. Replacement of Light Guide
2-6-2. Replacement of Power Button
KV-HA21M80
RM-969
KV-HA21M80
Demagnetic coil
!º Two screws
(washer head)
(+P 4 × 16)
2 Two screws
(Tapping 7+
Crown Washer)
!¡ Speaker
(15 × 6.5cm)
!¤ Speaker
(15 × 6.5cm)
4 Tension
spring
!£ Chassis assy
5 Deflection
yoke
6 CV board
3 Anode cap
Coating earth assy
7 Picture tube
8 Cushion
1
Two screws
(Tapping 7+
Crown Washer)
9 Two screws
(washer head)
(+P 4 × 16)
Holder DGC
Screw Location
Beznet Hook
PWB Bracket
CRT Support Block
CRT Support Block
2-7. PICTURE TUBE REMOVAL
Note:
• Please make sure the TV set is not in standing position before removing necessary
– 12 –
CRT support located on bottom right and left.
• REMOVAL OF ANODE-CAP
NOTE : After removing the anode, short circuit the anode of the picture tube and
the anode cap to the metal chassis, CRT shield or carbon paint on the
CRT.
• REMOVING PROCEDURES
a
a
1 Turn up one side of the rubber cap in the direction indicated by the arrow a.
b
b
2 Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow b.
c
Anode Button
3 When one side of the rubber cap is separated from the anode button, the anode-cap
can be removed by turning up the rubber cap and pulling it up in the direction of the
arrow c.
• HOW TO HANDLE AN ANODE-CAP
1 Do not damage the surface of anode-caps with sharp shaped objects.
2 Do not press the rubber too hard so as not to damage the inside of anode-cap.
A metal fitting called the shatter-hook terminal is built into the rubber.
3 Do not turn the foot of rubber over too hard.
The shatter-hook terminal will stick out or damage the rubber.
RM-969
SECTION 3
SET-UP ADJUSTMENTS
KV-HA21M80
RM-969
The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.
These adjustments should be performed with rated power
supply voltage unless otherwise noted.
Controls and switches should be set as follows unless otherwise
noted:
PICTURE control ........................................................... normal
BRIGHTNESS control................................................... normal
................................................................................................................................................................................................................................
Preparation :
In order to reduce the influence of geomagnetism on the
set's picture tube, face it east or west.
Switch on the set's power and degauss with the degausser.
Perform the adjustments in the following order :
1. Beam Landing
2. Convergence
3. Focus
4. White Balance
Note : Test Equipment Required.
1. Pattern Generator
2. Degausser
3. Oscilloscope
Purity control
3-1. BEAM LANDING
1. Input a white signal with the pattern generator.
Contrast
Brightness
2. Set the pattern generator raster signal to a green raster.
3. Move the deflection yoke to the rear and adjust with the
purity control so that the green is at the center and the blue
and the red take up equally sized areas on each side.
(See Figures 3-1 through 3-4.)
4. Move the deflection yoke forward and adjust so that the
entire screen is green. (See Figure 3-1.)
5. Switch the raster signal to blue, then to red and verify the
condition.
6. When the position of the deflection yoke has been decided,
fasten the deflection yoke with the screws and DY spacers.
7. If the beam does not land correctly in all the corners, use a
magnet to adjust it.
(See Figure 3-4.)
}
normal
Fig. 3-2
Red
Green
Fig. 3-3
Purity control corrects
this area.
ba
Blue
Disk magnets or rotatable
disk magnets correct
these areas (a-d).
Fig. 3-1
– 13 –
c
Deflection yoke positioning
corrects these areas.
a
d
d
Fig. 3-4
b
c
KV-HA21M80
RM-969
3-2. CONVERGENCE
Preparation :
• Before starting this adjustment, adjust the focus, horizontal
size and vertical size.
• Receive dot/hatch signal.
• Pic mode: Soft.
(1) Horizontal and Vertical Static Convergence
Center dot
R G B
H. STAT VR
R
G
B
V.STAT Magnet
RV 702
• Operation of V. Stat magnet
If the V. Stat magnet is moved in the "a" and "b" arrows, the
red, green and blue dots move as shown below.
1
2
a
b b
a
a
RGGBB
a
B
G
R
b
B
G
R
b
R
b
C board
1. (Moving vertically), adjust the V.STAT magnet so that the
red, green and blue dots are on top of each other at the
center of the screen.
2. (Moving horizontally), adjust the H.STAT VR control so
that the red, green and blue dots are on top of each other at
the center of the screen.
3. If the H.STAT variable resistor cannot bring the red, green
and blue dots together at the center of the screen, adjust the
horizontal convergence with the H.STAT variable resistor
and the V.STAT magnet in the manner given below.
(In this case, the H.STAT variable resistor and the V.STAT
magnet influence each other, so be sure to perform
adjustments while tracking.)
BMCPurity
BMC (Hexapole)
Purity
3
b
a
a
R
B
G
b
B
4 BMC (Hexapole) Magnet.
If the red, green and blue dots are not balanced or aligned,
then use the BMC magnet to adjust in the manner described
below.
RG B R G B R GB
RB
G
RG
GB
RB
b
G
R
V.STAT
V.STAT
– 14 –
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