3/2003 No revisions or updates are applicable at this time.
4/2003 Replaced A Board Transistor Voltage List (Q600, Q601) (Replace Page 34)
Replaced A Board IC Voltage List (IC600) (Replace Page 35)
9/2003 Added assembly P/N for Woofer Assembly (Replace Page 43)
11/2003 Replaced A Board Schematic to correct T603 PIN Connection (Replace Page 31)
Warnings and Cautions .............................................................................................................................................................. 5
1-3. Service Position ................................................................................................................................................................. 9
Anode Cap Removal Procedure....................................................................................................................................... 10
2-5. Method of Setting the Service Adjustment Mode ............................................................................................................. 14
2-6. White Balance Adjustments ............................................................................................................................................. 14
KV-21FA210
SECTION 3: SAFETY RELATED ADJUSTMENTS......................................................................................................................... 15
3-1. X R565 Conrmation Method (HV Hold-Down Conrmation) and Readjustments ........................................................ 15
3-2. B+ Voltage Conrmation and Adjustment ........................................................................................................................ 15
4-1. Setting the Service Adjustment Mode .............................................................................................................................. 17
4-3. Remote Adjustment Buttons and IndicatorS .................................................................................................................... 17
4-4. ID Map Table.................................................................................................................................................................... 26
4-5. A Board Adjustments........................................................................................................................................................ 26
5-2. Printed Wiring Board and Schematic Diagram Information.............................................................................................. 29
5.3 Block Diagram and Schematics ....................................................................................................................................... 30
A Board Schematic Diagram............................................................................................................................................ 31
K Board Schematic Diagram............................................................................................................................................ 41
More than 408 mVrms at the maximum volume setting (variable)
More than 408 mVrms (x); Impedance (output): 2 kilohms
Antenna
75 ohm external terminal for VHF/UHF
Supplied Accessories
Remote Commander:
RM-Y180
Size AA (R6) batteries (2)
Antenna, Telescopic
(•) SRS (SOUND RETRIEVAL SYSTEM)
The (•) SRS (SOUND RETRIEVAL SYSTEM) is manufactured by
Sony Corporation under license from SRS Labs, Inc. It is covered by U.S.
Patent No. 4,748,669. Other U.S. and foreign patents pending.
The word ‘SRS’ and the SRS symbol (•) are registered trademarks of
SRS Labs, Inc. BBE and BBE symbol are trademarks of BBE Sound, Inc.
and are licensed by BBE Sound, Inc. under U.S. Patent No. 4,638,258.
Design and specications are subject to change without notice.
KV-21FA210
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 identifi ed 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 operation are identifi ed in this manual. Follow these procedures
whenever critical components are replaced or improper operation is suspected.
— 5 —
SAFETY CHECK-OUT
KV-21FA210
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 specifi ed 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 milliampmeter. 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 cover-plate
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 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).
To Exposed Metal
Parts on Set
Trouble Light
Ohmmeter
Cold-water Pipe
0.15 F
1.5 K Ω
AC Outlet Box
AC
Voltmeter
(0.75 V)
Earth Ground
Figure A. Using an AC voltmeter to check AC leakage.Figure B. Checking for earth ground.
— 6 —
KV-21FA210
Self Diagnosis
Supported model
2 times
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF
3 sec.
SELF-DIAGNOSTIC FUNCTION
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to ash. The number
of times the LED ashes translates to a probable source of the problem. A denition of the STANDBY/TIMER LED ash 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 ash 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 rst 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
+B overcurrent (OCP)*
I-Prot
IK (AKB)
No. of times
STANDBY/ TIMER
lamp ashes
Does not light
2 times
4 times
5 times
Self-Diagnositc
Display/
Diagnostic Result
2:0 or 2:1
4:0 or 4:1
5:0 or 5:1
Probable Cause Location
• Power cord is not plugged in.
• Fuse is burned out (F601). (A Board)
• H.OUT (Q505) is shorted. (A Board)
• IC1751 is shorted. (CV Board)
• +13V is not supplied. (A Board)
• IC545 is faulty. (A Board)
• Video OUT (IC545) is faulty.
(A Board)
• IC001 is faulty. (A 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 deection 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 deection is detected simultaneously. The symptom that is diagnosed rst by the
mircrocontroller is displayed on the screen.
**Refer to Screen (G2) Adjustments in Section 2-4. of this manual.
Display of Standby/Timer LED Flash Count
Diagnostic Item Flash Count*
+B Overcurrent 2 times
I-Prot 4 times
IK (AKB) 5 times
*One ash 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 STANDBY/TIMER LAMP from ashing.
Standby/Timer LED
— 7 —
KV-21FA210
A BOARD
IC001
Y/CHROMA JUNGLE
A BOARD
IC545
V. OUT
A BOARD
IC001
SYSTEM
A BOARD
IC002
MEMORY
IK-AKBIN
FROM
CV BOARD
IC1751 PIN 5
I-HLDWN
FROM
A BOARD
IC561
PIN 7
72
O-LED
REF
I-Prot
IO-BDAT
BDA
DISPLAY
51
3
78
79
53
5
Self-Diagnostic Screen Display
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be conrmed, it is possible to bring up past
occurrences of failure on the screen for conrmation.
To Bring Up Screen Test
In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:
Display
Self-Diagnostic Screen Display
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:
Channel 8
Quitting the Self-Diagnostic Screen
To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.
Channel
SELF DIAGNOSTIC
2: 000
3: N/A
4: 000
5: 001
101: N/A
ENTER
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.
Self-Diagnostic Circuit
+B overcurrent (OCP)
Occurs when an overcurrent on the +B (135V) line is detected by pin 72 of IC001 (A Board). If the voltage of pin 72 of IC001 (A 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 deection pulse is detected by pin 78 of IC001 (A Board). Power supply will shut down when waveform interval
exceeds 2 seconds.
IK (AKB)
If the RGB levels* do not balance within 2 seconds after the power is turned on, this error will be detected by IC001 (A 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).
— 8 —
1-1. REAR COVER REMOVAL
Rear Cover
SECTION 1: DISASSEMBLY
6
Screws +BVTP 4X16 TYPE2 TT(B)
KV-21FA210
1-2. CHASSIS ASSEMBLY REMOVAL1-3. SERVICE POSITION
Claw
Chassis Assembly
KB Board
CV Board
A Board
the way.
— 9 —
1
Unplug KB Board and 2 pin woofer connector and move out of
2
Press on catch tab to release A Board.
Disconnect remaining cables to allow A Board to be removed.
3
1-4. PICTURE TUBE REMOVAL
WARNING: BEFORE REMOVING THE ANODE CAP
High voltage remains in the CRT even after the power is disconnected. To avoid electric shock,
discharge CRT before attempting to remove the anode cap. Short between anode and CRT
coated earth ground strap.
1
10
1. Discharge the anode of the CRT and remove the anode cap.
8
7
3
6
2
5
9
4
2. Unplug all interconnecting leads from the defl ection yoke, neck
assembly, degaussing coils and CRT grounding strap.
3. Remove the CV Board from the CRT.
4. Remove the chassis assembly.
5. Loosen the neck assembly fi xing screw and remove.
6. Loosen the defl ection yoke fi xing 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 tension devices.
10. Unscrew the four CRT fi xing screws [located on each CRT
corner] and remove the CRT [Take care not to handle the CRT
by the neck].
KV-21FA210
Coated
Earth
Ground
Strap
ANODE CAP REMOVAL PROCEDURE
WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to
remove the anode cap. Short between anode and coated earth ground strap of CRT.
NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon
painted on the CRT.
REMOVAL PROCEDURES
c
b
a
Anode Button
Turn up one side of the rubber cap in
the direction indicated by arrow
a
.
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 fi tting 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.
Use your thumb to pull the rubber
cap fi rmly in the direction indicated
by arrow
.
b
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
— 10 —
SECTION 2: SET-UP ADJUSTMENTS
Purity Control
a
c
b
d
b
a
cd
Purity control
corrects this area.
Disk magnets
or rotatable disk
magnets correct
these areas (a-d).
Deflection yoke positioning
corrects these areas.
KV-21FA210
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.
Set the controls as follows unless otherwise noted:
VIDEO MODE: Standard
PICTURE CONTROL: Normal
BRIGHTNESS CONTROL: Normal
2-1. 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 deection 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 Test Equipment Required:
1. Color Bar Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
6. Switch over the raster signal to red and blue and conrm the
condition.
7. When the position of the deection yoke is determined, tighten it with
the deection yoke mounting screw.
8. If landing at the corner is not right, adjust by using the disk magnets.
3. Turn the raster signal of the pattern generator to green.
4. Move the deection yoke backward, and adjust with the purity control
so that green is in the center and red and blue are even on both
sides.
5. Move the deection yoke forward, and adjust so that the entire
screen becomes green.
— 11 —
KV-21FA210
B
G
R
Center dot
V.STAT magnet
RV1750
V.STAT
B
G
R
B
R
G
B
R
G
R G B
B G R
1
2
b
b
b
b
b
b
b
a
a
b
a
a
a
a
3
R
G
B
B
G
R
BMC MAGNET
PURITY
V.STAT
b
BMC magnet
a
2-2. CONVERGENCE
Before starting convergence adjustments:
1 Perform FOCUS, VLIN and VSIZE 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 (Vertical movement adjust S V.STAT RV1750 to
converge).
HORIZONTAL STATIC CONVERGENCE
If the blue dot does not converge with the red and green dots, peform
the following:
1. Move BMC magnet (a) to correct insufcient H.Static convergence.
2. Rotate BMC magnet (b) to correct insufcient V.Static convergence.
3. After adjusting the BMC magnet, repeat Beam Landing Adjustment.
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 arrow a and b,
red, green, and blue dots move as shown below:
— 12 —
DYNAMIC CONVERGENCE ADJUSTMENT
Before performing this adjustment, perform Horizontal and Vertical Static
Convergence Adjustment.
1. Slightly loosen defl ection yoke screw.
2. Remove defl ection yoke spacers.
3. Move the defl ection yoke for best convergence as
shown below:
G
B
R
R
G
B
BGR
B
G
R
R
B
G
R
B
G
KV-21FA210
B R R B
(R)(B) (B)(R)
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.)
Note: Perform adjustment 3-6 while tracking items 1 and 2.
TLH+
TLH-
SCREEN-CORNER CONVERGENCE
BGR
B
G
R
B
G
R
B
R
G
B
R
G
R
GB
4. Tighten the defl ection yoke screw.
5. Install the defl ection 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 defl ection yoke.
RV1750
V. STAT
TLH Plate
1. Affi x a permalloy assembly corresponding to the misconverged areas:
b
a
ba
a-d: screen-corner
misconvergence
c
d
c
d
2-3. FOCUS
1. Adjust FOCUS control for best pictures.
Focus (FV)
Screen (G2)
CV
Board
XCV
(TLV)
YCH
TLV
— 13 —
KV-21FA210
2-4. SCREEN (G2)
1. Input a dot 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 160 ± 2VDC.
±
160 – 2VDC
Pedestal
Ground
4. Observe the screen and adjust SCREEN (G2) VR in FBT to obtain
the faintly visible background of dot signal.
2-5. METHOD OF SETTING THE SERVICE
ADJUSTMENT MODE
SERVICE MODE PROCEDURE
1. Standby mode (power off).
2. Press
Display
Channel 5 Sound Volume
on the Remote Commander (press each button within a second).
Power
+
2-6. WHITE BALANCE ADJUSTMENTS
1. Input an entire white signal with burst.
2. Set to Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Adjust with SBRT if necessary.
5. Select GCUT and BCUT with
6. Adjust with
3
and 6 for the best white balance.
7. Set the PICTURE and BRIGHTNESS to maximum.
8. Select GDRV and BDRV with
9. Adjust with
3
and 6 for the best white balance.
10. To write into memory, press
1
and 4 .
1
and 4.
MUTING
then
ENTER
.
SERVICE ADJUSTMENT MODE ON
1. The CRT displays the time being adjusted.
2. Press
3. Press
4. Press
Display
hsiz16
to save into the memory.
service
ntsc
vchp
then
Category
defl
00000000
ENTER
Mode
Signal
Type
1
or 4 on the Remote Commander to select the time.
3
or 6 on the Remote Commander to change the data.
MUTING
Item
00000000
Display
Item
SERVICE ADJUSTMENT MODE MEMORY
Turn the set off then on to exit Service Adjustment Mode.
Signal
Type
Category
Mode
service defl hsiz16
ntsc
vchp 00000000 00000000
Display
Item
write
Item
Data
MUTING
ENTER
Green
Red
— 14 —
SECTION 3: SAFETY RELATED ADJUSTMENTS
KV-21FA210
3-1. X R565 CONFIRMATION METHOD
(HV HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS
The following adjustments should always be performed when replacing
the following components which are marked with
diagram:
1. Using a Variac, apply AC input voltage: 120 ±2 VAC.
2. Turn the POWER switch ON.
3. Input a white signal and set the PICTURE and BRIGHTNESS
controls to maximum.
4. Confi rm that the voltage between C566 (+) or TP30 and ground is
more than 105 VDC.
HOLD-DOWN OPERATION CONFIRMATION
1. Connect the current meter between Pin 11 of the FBT (T585) 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 ± 100µA.
3. Confi rm the voltage of A Board TP-23 is 138.0 ± 0.3VDC.
4. Connect the digital voltmeter and the DC power supply via Diode
1SS119 to C566 (+) and ground (See Figure 1 on next page).
5. Increase the DC power voltage gradually until the picture blanks out.
6. Turn DC power source off immediately.
7. Read the digital voltmeter indication (standard < 117VDC).
8. Input a white signal and set PICTURE and BRIGHTNESS to
maximum: IABL = 1650 ± 100µA.
9. Repeat steps 4 to 7.
HOLD-DOWN READJUSTMENT
If the setting indicated in Step 2 of Hold-Down Operation Confi rmation
cannot be met, readjustment should be performed by altering the
resistance value of R565 component marked with
X
.
T585
FBT
amPmeter
3.0 mA DC
range
ABL
+
-
A
IABL
3-2. B+ VOLTAGE CONFIRMATION AND
ADJUSTMENT
Note: The following adjustments should always be performed when
replacing the following components, which are marked with
schematic diagram on the A Board:
A BOARD: Y IC604, PH602
1. Using a Variac, apply AC input voltage: 130 + 2.0 / - 0.0 VAC.
2. Input a DOT pattern at Q.C.
3. Set the PICTURE and the BRIGHTNESS controls to minimum.
4. Confi rm the voltage of A Board between TP-23 & Ground is <136.6
VDC.
5. If step 4 is not satisfi ed, replace the components listed above, then
repeat Steps 1 – 3.
Y
on the
— 15 —
KV-21FA210
(
)
DIGITAL
MULTIMETER
+
-
X
R565
R
5
3
1
0
4
S
P
R
5
1
1
J
R
1
R
4
3
7
0
6
R
C
4
5
1
C
5
D
5
6
5
2
R
5
8
9
T
2
P
4
2
9
L
3
7
0
1
5
6
C
1
5
T
2
8
6
2
R
5
3
2
L
3
7
1
1
1
5
C
R
2
1
5
C
1
1
5
L
1
C
5
3
1
5
L
0
2
B
2
P
5
T
R
5
0
2
4
R
5
3
3
C
5
4
0
5
S
5
6
5
C
I
C
5
3
0
6
2
5
D
5
2
5
L
5
1
0
6
2
5
C
3
1
5
C
4
1
5
C
H
5
Q
B
5
2
5
C
L
5
1
5
R
5
3
7
R
5
6
2
2
R
5
5
2
2
E
C
5
2
7
R
5
4
9
R
5
1
5
6
7
C
5
6
1
R
5
4
6
5
4
5
D
6
R
5
4
8
C
5
4
5
R
9
0
R
5
4
0
0
0
D
2
7
C
R
5
4
7
6
6
1
5
L
R
5
C
5
4
8
1
J
R
5
0
POWER
SUPPLY
+
1SS119
C566
Q
4
0
2
R
4
0
8
R
4
1
1
.
H
P
O
R
T
R
P
0
T
3
6
6
5
D
R
5
2
9
C
5
6
2
C
5
2
9
1
6
5
C
I
C
5
4
4
2
C
5
9
7
1
T
P
V
.
O
U
T
5
4
7
5
4
5
C
I
4
1
C
5
9
5
P
7
T
1
R
9
0
1
5
1
2
C
2
5
2
8
D
5
2
8
D
6
1
R
5
8
3
2
8
5
C
P
T
3
3
Q
5
2
1
5
7
5
R
C
5
7
1
R
5
6
8
D
5
6
8
5
6
7
R
5
7
0
D
5
6
R
R
2
8
5
L
9
5
2
6
R
5
6
9
5
7
4
D
6
3
0
6
0
1
2
0
6
C
6
1
0
0
2
4
TP23
8
9
5
E
R
5
0
R
5
9
3
3
0
5
R
C
5
9
0
1
9
5
R
B
0
9
5
Q
R
5
9
4
T
P
1
3
4
2
6
E
C
6
C
P
3
T
2
1
6
8
C
4
0
4
2
6
D
4
5
0
5
C
H
-
O
Q
5
C
5
0
4
1
6
5
0
5
R
U
T
E
0
5
6
0
5
C
6
0
5
D
3
4
R
5
0
6
C
5
1
T
2
P
2
0
C
4
1
5
R
2
1
5
R
H
D
T
5
0
5
T
H
B
5
8
8
R
8
5
L
T
U
O
6
0
5
Q
6
G
2
0
0
V
8
N
/
C
V
D
Y
+
P
T
2
1
V
D
Y
-
T
2
P
7
H
D
Y
-
P
T
2
8
H
D
Y
-
H
D
Y
+
T
H
D
Y
+
3
1
H
-
O
2
P
9
1
5
5
N
C
D
R
5
9
8
T
1
P
9
H
E
A
T
E
R
N
D
5
V
U
T
-
1
3
V
G
G
N
D
G
N
D
N
D
5
5
T
+
1
3
V
N
/
C
A
B
L
T
2
P
0
R
5
8
8
F
B
T
1
AMMETER
3mA dc range
A
+
-
Figure 1
— 16 —
service defl hsiz16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Signal
Type
service defl hsiz16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Signal
Type
write
service defl hsiz 16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Signal
Type
write
Carry out Step 1 when adjusting
IDs 0-7 and when replacing and
adjusting IC002
SECTION 4: CIRCUIT ADJUSTMENTS
ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER
Use the Remote Commander(RM-Y180) to perform the circuit adjustments in this section.
Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
KV-21FA210
4-1. SETTING THE SERVICE ADJUSTMENT
MODE
1. Standby mode (Power off).
2. Press the following buttons on the remote commander within a
second of each other:
Display
Channel 5
Sound Volumne +
Power
SERVICE ADJUSTMENT MODE ON
1. The CRT displays the item being adjusted.
2. Press 1 or 4 on the Remote Commander to select the item.
3. Press 3 or 6 on the Remote Commander to change the data.
4. Press
MUTING
then
ENTER
to write into memory.
SERVICE ADJUSTMENT MODE MEMORY
1. Press 8 then
ENTER
on the Remote Commander to initialize.
4-2. MEMORY WRITE CONFIRMATION
METHOD
1. After adjustment, pull out the plug from the AC outlet, then replace
the plug in the AC outlet again.
2. Turn the power switch ON and set to Service Mode.
3. Call the adjusted items again to conrm they were adjusted.
4-3. REMOTE ADJUSTMENT BUTTONS AND
INDICATORS
MUTING
(Enter into
memory)
1
Disp. (Item up)
2
(Device Item Up)
4
Disp. (Item down)
8
(Initialize)
POWER
(Service Mode)
DISPLAY
(Service Mode)
3
Item
(Data up)
6
Item
(Data down)
5
(Device item
down)
ENTER
(Enter into
memory)
0
(Remove from
memory)
3. Press
2. Turn set off then on to exit Service Adjustment Mode.
MUTING
then
ENTER
to write into memory.
VOLUME (+)
(Service Mode)
RM-Y180
— 17 —
ADJUSTMENT ITEMS (1 OF 8)
DEVICE "DEF"
Item#OSDDETAIL
1HSIZH SIZE(EW DC)00-6325
2HPOSH POSITION00-6341
3VSIZV RAMP SIZE00-6325
4VPOSV POSITION(RAMP DC)not useful00-6334
5VLIN V LINEARITY00-6336
6SCOR S CORRECTION00-6339
7VBOWBOW00-6336
8VANGANGLE00-6335
1COFI0:4 Line delays 1:2 Line delays00-010
2YNRSYNR ON00-010
3YTHRY SIGNAL GENERATE from 2DYCS00-010
4Y2DY SIGNAL GENERATE from 2DYCS00-010
52DFXC SIGNAL GENERATE from H/V BPF only00-011
6CLPSY CLAMP TIME CONSTANT00-011
7VLPFY_LPF(ANALOG) fo Adjust 00-033
8CLPFC_LPF(ANALOG) fo Adjust00-033
9MV2SMACROVISION(BURST) DET POSITION00-011
10ACCSACC ON/OFF00-010/YUV:1
11KILSKILLER DET SELECT00-010/YUV:1
12AASLC DECODER TIME CONSTANT(32,16,8,1H)00-033
13BASLACC TIME CONSTANT00-030
14ATIMANALOG ACC HYSTERESIS SELECT00-030
15VMSKACC V BLK OFF WIDTH00-070
16A3ONACC MAX GAIN00-010
17INTEC DECODER INTEGRATOR ENABLE00-010
18SINC DECODER PHASE V ENABLE00-010
19CKVTPLL STOP BURST LEVEL00-031
20XFFRVCXO FORCE FREERUN00-010/YUV:1
21ACCVC DECODER PHASE V ENABLE00-011
22BWSLKILLER DET SELECT00-011/YUV:1
23BWDTPLL KILLER VTH00-030/YUV:3
24A23EAMP2,3 ON/OFF ENABLE(0 FIX)00-011
25A2ONABL VTH00-12712
26A3ONACL VTH00-12712
27A2FLAMP2 OFF LEVEL lower00-25534
28A2FHAMP2 OFF LEVEL upper00-010
29A3FLAMP3 OFF LEVEL lower00-25534
30A3FHAMP3 OFF LEVEL upper00-010
31AXTHAXS HYS00-6330
32ACTHROM HYS00-6310
33AVAVAVE SEL AV00-033
34B2THB2COMP00-1270
ANALOG ACC hysteresis
Range
(DEC)
Range
(DEC)
Initial Data
Initial Data
KV-21FA210
— 21 —
ADJUSTMENT ITEMS (5 OF 8)
DEVICE "RGB"
Item#OSDDETAIL
1AMUTRGB POWER ON MUTE00-010
2PMUTRGB MUTE(EXCEPT OSD)00-011
3VBLK00-010
4CORLR CUTOFF lower00-255200
5CORHR CUTOFF upper00-010
6COGLG CUTOFF lower when Color Temp. is "Cool" and "Neutral"00-255200
7COGHG CUTOFF upper when Color Temp. is "Cool" and "Neutral"00-010
8COBLB CUTOFF lower when Color Temp. is "Cool" and "Neutral"00-255200
9COBHB CUTOFF upper when Color Temp. is "Cool" and "Neutral"00-010
10ABLSABL SELECT (ON:00, OFF:01)00-010
11ACLSACL ON (ON:00, OFF:01)00-011
12ALSPACL SPEED00-031
13ALRSACL RECOVER SPEED00-152
14ALASACL ATTACK SPEED00-159
15ABLGABL GAIN00-1515
16ALS2ACL ATTACK SPEED(2)00-032
17AKBSAKB MODE00-011
18AKBPAKB PULSE HEIGHT00-6355
19OSDLOSD LIMIT SELECT00-010
20MPXSUV MULTIPLEX ON00-010/YUV:0
21CXUVYC/YUV SELECT00-010/YUV:1
22UVINU/V INVERT00-010/YUV:0
23UVOSUV OFFSET CANCELER ON00-010/YUV:0
24ACLSOFT ACL CONTROL00-6363
25HBLSH BLK OFF00-010
26VENSV-latch OFF00-010
27UOFSU IN OFFSET00-154
28VOFSV IN OFFSET00-159
29AABLANALOG ABL THRESHOLD LEVEL CONTROL00-150
30AABGANALOG ABL GAIN CONTROL00-010
31AALGANALOG ACL GAIN CONTROL00-010
32AABSANALOG ABL ON/OFF CONTROL (ON:01, OFF:00)00-010
33AALSANALOG ACL ON/OFF CONTROL (ON:01, OFF:00)00-011
Range
(DEC)
Initial Data
KV-21FA210
— 22 —
ADJUSTMENT ITEMS (6 OF 8)
DEVICE "DEFD"
Item#OSDDETAIL
1VSTPV OUTPUT STOP00-010
2HFFRAFC1 FORCE FREERUN00-010
3HFUPH FREERUN FREQUENCY UP(700Hz)00-010
4VPHAV PHASE(V POSITION ADJUST)00-150
5JSWWJump Pulse Width00-010
6EWGEWV AD OUTPUT LEVEL(6db) 00-010
7EWCLEW/VRAMP DA CLOCK SELECT00-032/YUV:2
8EWDIEW/VRAMP DA DITHER00-010
9XF0AVCXO FREERUN ADJUST00-150
10BGSTBGP(for PLL) TIMING00-6317
11SKWISkew correcter reference phase00-010/YUV:0
12XPHAVCXO PHASE ADJUST00-1510
13SKEWSkew corrector phase control00-070/YUV:3
14HRMPAFC2 TIME CONSTANT00-030
15RPLUREF PLL TIME CONSTANT00-073
16RPLBREF PLL TIME CONSTANT00-011
17XF0BVCXO Fo ADJUST00-030
18RPLSREF VCO FB LOOP SELECT00-010
19SSMSyncSepaMasking CONTROL00-010
20VSAGV-SAG prevent ON00-010
21AFC2AFC2 GAIN CONTROL00-030
22VRFLV RAMP FILTER SWITCHING OFF00-010
23SSLPLPF pre SYNC SEPA ON/OFF00-010
24IMTSI.M. TEST00-010
25XPLUACP TIME CONSTANT00-011
268FSC8fscCLK Skew OFF00-011/YUV:1
274FS24fscCLK Skew OFF00-011/YUV:1
28EWVRDSDAC V RESET Enable00-010
29VLOFIIC V Latch OFF(for TEST)00-010
301WIN FORCE 1Window00-011
31BGPCANGLE Return current up00-010
32MHDLANGLE Return current up timing00-011
33BFREforce V FREERUN00-010
34ANGGANGLE Retun current up00-011
35ANGTANGLE Retun current up timing00-010
36DOSDDigital OSD ON00-010
37ANGSAFC2 ANGLE/BOW INHIBIT00-010
38HRPPFRAMP RRAMP H OUT CONTROL RANGE 00-158
39VF50FORCE V FREERUN 50Hz00-010
40CLKSTBC clock system select00-030
41VBHKV BLK HALF KILL00-010
42DSYCCVBS INPUT CONTROL00-010
43VPWV Pulse Wide00-011
44QSWMODULATOR FEEDBACK GAIN CONTROL00-010
45ADTYCLOCK DUTY CONTROL at IIC QSWITCH=ON00-010
46DTHDITHER THRESHOLD LEVEL CONTROL at IIC AUTOD=ON00-031
47HBSWHBLK REFERENCE AFC1/AFC200-010
48DSCSǻȈDAC CLOCK ON/OFF CONTROL00-010
2. Connect a frequency counter to base of Q502
(TP-25 H. DRIVE) on the A Board.
3. Check H. Frequency for 15735 ± 200 Hz.
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-27 (V OUT) or CN515 pin
(V DY+) and ground on the A Board .
4. Check that V. Frequency shows 60 ± 4 Hz.
6
DRIVE (SCON)
1. Input a color-bar signal and set the level to 75%.
2. Set in Standard mode.
3. Activate the Service Adjustment Mode.
3
4. Set AALS, ABLS, GON and BON items. Using
the following values. Leave RON set to “1”.
Display
Mode
Category
Item
and
6
set each to
Item
Data
96 + 3Vpp
8. Reset AALS, ABLS, GON and BON values to “1”.
AALS: ON (1)
ABLS: ON (0)
R ON: ON (1)
G ON: ON (1)
B ON: ON (1)
9. Press
MUTING
then
ENTER
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
4. Adjust values of DISP with
5. Write to memory by pressing
6. Check to see if the text is displayed on the screen.
Signal
Type
1
and 4 .
3
and 6 to adjust characters to the center.
MUTING
then
ENTER
Display
Mode
Category
Item
service micro disp 48
ntsc
.
Item
Data
KV-21FA210
Signal
Type
AALS: OFF (0)
ABLS: OFF (1)
R ON: ON (1)
G ON: OFF (0)
B ON: OFF (0)
5. Connect an oscilloscope probe to CV Board, J1751Pin 12 (KR) (Red
Out) .
6. Select SCON with
7. Adjust the value of SCON with
service video rdrv
ntsc
vchp
1
and 4 .
00000000 00000000
3
and 6 for 96 ± 3Vpp.
26
vchp
00000000 00000000
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 SBRT item with
5. Adjust the values of SBRT with
crosshatch.
6. Press
MUTING
then
1
and 4 .
ENTER
3
and 6 to obtain a faintly visible
to save into the memory.
SUB HUE, SUB COLOR ADJUSTMENT
(SHUE, SCOL)
1. Input color-bar signal at 75%.
2. Activate the Service Adjustment Mode.
3. Set (PIC) to Max and (COL) to 50%.
4. Connect an oscilloscope probe to CV Board, CN301Pin
1
5. Select the SHUE and SCOL item with
6. While showing the SHUE item, adjust the waveform with
until the second and third bars show the same level
(V2 = V3 < 0.15Vp-p). Set Sub Hue -2 Step.
and 4 .
4
Blue Out.
1
and 4
— 26 —
KV-21FA210
7. While showing the SCOL item, adjust the waveform with
until the fi rst and fourth bars show the same level
(V1 = V4 < 0.15Vp-p). Set Sub Col +3 Step.
8. Press
MUTING
then
V2 V3
V1
ENTER
V4
to save into the memory.
3
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
5. Press
MUTING
then
1
and 4 .
1
and 4 for the best vertical center.
ENTER
to save into the memory.
V. CENTER ADJUSTMENT (VPOS)
and 6
H. SIZE ADJUSTMENT (HSIZ)
1. Input a monoscope signal.
2. Activate the Service Adjustment Mode.
1
3. Select HSIZ with
4. Adjust with
5. Press
MUTING
and 4 .
3
and 6 for the best horizontal size.
ENTER
then
to save into the memory.
V. LINEARITY (VLIN), V. CORRECTION
(SCOR), PIN AMP (PAMP), AND
HORIZONTAL TRAPEZOID (HTRP)
ADJUSTMENTS
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select VLIN, SCOR, PAMP, and HTRP with with
4. Adjust with
5. Press
3
and 6 for the best horizontal size.
MUTING
then
V LINEARITY (VLIN)
to save into the memory.
ENTER
1
and 4.
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
5. Press
MUTING
then
1
and 4 .
3
and 6 for the best vertical center.
ENTER
to save into the memory.
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
5. Press
MUTING
then
1
ENTER
and 4 .
3
and 6 for the best horizontal center.
to save into the memory.
V CORRECTION (SCOR)
PIN AMP (PAMP)
HORIZONTAL TRAPEZOID (HTRP)
— 27 —
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 1 and 4.
4. Adjust with
5. Press
3
and 6 for the best picture.
ENTER
MUTING
then
V ANGLE (VANG)
V BOW (VBOW)
UPPER PIN (UPIN)
to save into the memory.
KV-21FA210
LOW PIN (LPIN)
SERVICE ADJUSTMENT MODE MEMORY
ENTER
0
Item
then
7
.
Item
Data
Green
Red
ENTER
1. After completing all adjustments, press
Read From Memory
Display
Mode
Category
service defl vbow
Signal
Type
ntsc
vchp
00000000 00000000
0
— 28 —
SECTION 5: DIAGRAMS
KV-21FA210
5-1. CIRCUIT BOARDS LOCATION
KB Board
HR Board
5-2. PRINTED WIRING BOARD AND
All capacitors are in µF unless otherwise noted. pF : µµF 50WV or less
are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specifi ed.
All resistors are in ohms. k=1000, M=1000k
Indication of resistance, which does not have one for rating electrical
power, is as follows: Pitch : 5mm Rating electrical power :
1
All variable and adjustable resistors have characteristic curve B, unless
otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10M digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production tolerances.
All voltages are in V.
S : Measurement impossibillity.
Circled numbers are waveform references.
K Board
M3 Board
A Board
SCHEMATIC DIAGRAM INFORMATION
/
W in resistance, 1/
4
: nonfl ammable resistor.
: fusible resistor.
: internal component.
: panel designation and adjustment for repair.
: earth ground
: earth-chassis
: B+line.
: signal path. (RF)
W and 1/
10
W in chip resistance.
8
: B-line. (Actual measured value may be different).
CV Board
The components identifi ed by X in this basic schematic diagram have
been carefully factory-selected for each set in order to satisfy regulations
regarding X-ray radiation. Should replacement be necessary, replace
only with the value originally used.
When replacing components identifi ed by
Y
, make the necessary
adjustments as indicated. If the results do not meet the specifi ed value,
change the component identifi ed by
X
and repeat the adjustment until
the specifi ed value is achieved. (Refer to Section 3: Safety Related
Adjustments on Page 15.)
When replacing the parts listed in the table below, it is important to
perform the related adjustments.