Warnings and Cautions ........................................................................................................................................................................................ 5
Self-Diagnostic Function ...................................................................................................................................................................................... 7
1-3. Service Position ............................................................................................................................................................................................ 9
3-1. Remote Adjustment Buttons and Indicators ............................................................................................................................................... 15
3-2. Accessing the Service Menu Mode ............................................................................................................................................................ 16
3-3. Confi rming Service Adjustment Changes ................................................................................................................................................... 17
3-4. White Balance Adjustments ........................................................................................................................................................................ 17
3-6. Service Data ............................................................................................................................................................................................... 19
4-2. Printed Wiring Board and Schematic Diagram Information ........................................................................................................................ 28
Signal Flow Block Diagram ........................................................................................................................................................................ 29
4-4. Schematics and Supporting Information .................................................................................................................................................... 30
A Board Schematic Diagram (1 of 6) ......................................................................................................................................................... 30
A Board Schematic Diagram (2 of 6) ......................................................................................................................................................... 31
A Board Schematic Diagram (3 of 6) ......................................................................................................................................................... 32
A Board Schematic Diagram (4 of 6) ......................................................................................................................................................... 33
A Board Schematic Diagram (5 of 6) ......................................................................................................................................................... 34
A Board Schematic Diagram (6 of 6) ......................................................................................................................................................... 35
SECTION 6: ELECTRICAL PARTS LIST ........................................................................................................................................................................ 44
KV-21FA350/21FA550
3
SPECIFICATIONS
KV-21FA350/21FA550
Television system
American TV standard, NTSC
Channel coverage
VHF: 2-13/UHF: 14-69/CATV: 1-125
Antenna
75-ohm external antenna terminal for VHF/UHF
Picture tube
FD Trinitron® tube
Visible screen size
508mm (20-inch) picture measured diagonally
Actual screen size
533.4mm (21-inch) measured diagonally
Supplied Accessories
Remote Commander RM-YA005
Two Size AA (R6) Batteries
Converter EAC-25
Dipolo Antenna
2 - Bocinas Satelite cables (KV-21FA550 Only)
As an ENERGY STAR® Partner, Sony
Corporation has determined that this
product meets the ENERGY STAR®
guidelines for energy efficiency. ENERGY
STAR® is a U.S. regis tered mark.
TruSurround, SRS and the ( )® symbol are trademarks of
SRS Labs, Inc.
Manufactured under license from BBE Sound,
Inc. Licensed by BBE Sound, Inc. under USP
4638258, 5510752 a nd 5736897. BBE and BBE
symbol are registered trademarks of BBE
Sound, Inc.
Sony, FD Trinitron, WEGA®, Steady Sound and Intelligent Picture
are
registered trademarks of Sony Corporation.
Design and specifi cations are subject to change without notice.
4
KV-21FA350/21FA550
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.
KV-21FA350/21FA550
5
SAFETY CHECK-OUT
KV-21FA350/21FA550
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 troublelight (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).
0.15 µF
Figure A. Using an AC voltmeter to check AC leakage.Figure B. Checking for earth ground.
KV-21FA350/21FA550
To Exposed Metal
Parts on Set
1.5 K Ω
Earth Ground
AC
Voltmeter
(0.75 V)
Trouble Light
AC Outlet Box
Ohmmeter
Cold-water Pipe
6
KV-21FA350/21FA550
SELF-DIAGNOSTIC FUNCTION
Self Diagnosis
Supported model
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED indicator will automatically begin to fl ash. The number of
times the LED fl ashes translates to a probable source of the problem. A defi nition of the STANDBY LED fl 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.
1. Diagnostic Test Indicators
When an error occurs, the STANDBY LED indicator will fl ash 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 fi 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)*
V-Protect (OVP)
IK (AKB)
Power Supply
NG (+5V) for
Video Processor
No. of Times
STANDBY LED
Indicator Flashes
Does not light
2 times *
4 times
5 times
8 times
Self-Diagnositc
Display/
Diagnostic Result
2:0
or
2:1 - 255
4:0
or
4:1 - 255
5:0
or
5:1 - 255
8:0
or
8:1 - 255
Probable Cause Location
• Power cord is not plugged in.
• Fuse is burned out (F600). (A Board)
• H.OUT (Q805) is shorted. (A Board)
• IC751 is shorted. (C Board)
• +13V is not supplied. (A Board)
• IC804 is faulty. (A Board)
• Video OUT (IC1545) is faulty(A Board)
• IC001 is faulty. (A Board)
• Screen (G2) is improperly adjusted.**
• IC604 is faulty.
• IC602 is faulty.
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 defl ection 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.
• No power supply to CRT Anode.
• No RASTER is generated.
*One fl ash count is not used for self-diagnostic.
*If a +B overcurrent is detected, stoppage of the vertical defl ection is detected simultaneously. The symptom that is diagnosed fi rst by the mircrocontroller
is displayed on the screen.
**Refer to Screen (G2) Adjustments in Section 2-4. of this manual.
2. Display of STANDBY LED Flash Count
2 times
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF
3 sec.
Standby indicator
3. Stopping the STANDBY LED Indicator Flash
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY LED Indicator from fl ashing.
4. Self-Diagnostic Screen Display
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confi rmed, it is possible to bring up past
occurrences of failure on the screen for confi rmation.
KV-21FA350/21FA550
7
To Bring Up Screen Test
In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:
KV-21FA350/21FA550
The following screen will be displayed indicating the error count:
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:
DISPLAY
SELF DIAGNOSTIC
2 OCP : 0
3 OVP : N/A
4 VSTOP : 0
5 AKB : 1
8 SUP : 0
101 WDT : N/A
SERIAL:
MODEL:
Channel
5
Sound Volume -
Number “0” means that no fault was detected.
Number “1” means a fault was detected one time only.
POWER
Note that this differs from entering the Service Mode (Sound Volume + ).
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.
Self-Diagnostic Circuit
FROM
C BOARD
IC751 PIN 5
0
A BOARD
IC001
Y/CHROMA JUNGLE
84
IK
A BOARD
IC804
V. OUT
F.B-PLS
3
A BOARD
IC001
SYSTEM
13
V. GUARD
SDAO
109
A BOARD
IC003
MEMORY
5
SDA
FROM
32
A BOARD
Q816
COLLECTOR
+B overcurrent (OCP)
Occurs when an overcurrent on the +B (135V) line is detected by pin 32 of IC001 (A Board). If the voltage of pin 32 of IC001 (A Board) is more than 4V
when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.
V-Protect
Occurs when an absence of the vertical defl ection pulse is detected by pin 13 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 15 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.
Power Supply NG (+5V) for Video Processor
Occurs when IC001 internal HV protect detects an abnormal H-Pulse (frequency) due to improper power supply to IC001. The TV cuts off high voltage
power of anode CRT. No picture will be detected. eg: faulty IC602 or IC604
EHTO
RED-LED
122
DISPLAY
KV-21FA350/21FA550
8
SECTION 1: DISASSEMBLY
KV-21FA350/21FA550
1-1. REAR COVER REMOVAL
1
Lift to remove Subwoofer from top of Rear Cover.
2
Remove screws from top of Rear Cover.
4 Screws +BVTP2 4x16
3
Remove screws from both sides of Rear Cover.
6 Screws +BVTP2 4x16
Remove screw from bottom of Rear Cover.
4
1 Screw +BVTP2 4x16
Remove screws from Speaker Switch and Rear Cover.
5
2 Screws +BVTP 3x12 TYPE2 TT(B)
Slide to remove Rear Cover from Beznet.
1-2. CHASSIS ASSEMBLY REMOVAL
1
Remove J4 Board and Bracket.
One Screw +BVTP 3x12 TYPE2 IT-3
2
Push down claw and slide out A, H2 and W Board.
2
1
3
5
4
2
1-3. SERVICE POSITION
1
Release AC Power cord.
2
Rotate A, H2 and W Boards.
2
1
KV-21FA350/21FA550
1
9
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.
KV-21FA350/21FA550
1
8
9
10
7
1. Discharge the anode of the CRT and remove
the anode cap.
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].
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 shatterhook terminal to protrude and damage the rubber.
KV-21FA350/21FA550
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
KV-21FA350/21FA550
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:
Picture control NORMAL
Brightness control NORMAL
2-1. BEAM LANDING
Before beginning adjustment procedure:
1. Feed in the white pattern signal.
2. In order to reduce the geomagnetism on the set’s picture tube, face
it east or west.
Adjustment Procedure
1. Input a raster signal with the pattern generator.
2. Loosen the defl ection yoke mounting screw, and set the purity
control to the center as shown below:
Purity control
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
5. Oscilloscope
6. Landing Checker
7. XCV Adjuster
4. Digital Multimeter
6. Switch over the raster signal to red and blue and confi rm the
condition.
7. When the position of the defl ection yoke is determined, tighten it
with the defl ection yoke mounting screw.
8. If landing at the corner is not right, adjust by using the disk
magnets.
Purity control
corrects this area.
a
b
d
c
Deflection yoke positioning
corrects these areas.
Disc magnets or rotatable
disc magnets correct these
areas (a-d).
3. Turn the raster signal of the pattern generator to green.
4. Move the defl ection yoke backward, and adjust with the purity
control so that green is in the center and red and blue are even on
both sides.
Blue
Red
Green
5. Move the defl ection yoke forward, and adjust so that the entire
screen becomes green.
b
c
a
d
KV-21FA350/21FA550
11
KV-21FA350/21FA550
2-2. CONVERGENCE
Before starting convergence adjustments:
1 Perform FOCUS, VLIN and VSIZE adjustments.
2. Set BRIGHTNESS control to minimum.
3. Set Picture mode to STANDARD.
4. Feed in dot pattern.
Vertical Static Convergence
1. Adjust the 4 pole magnet to converge red, green and blue dots in
the center of the screen.
Center dot
R G B
R
G
B
4 pole magnet
Horizontal Static Convergence
If the blue dot does not converge with the red and green dots, use the 6
pole magnet to adjust as shown:
RG B R G B RGB
RB
G
RG
RB
6 Pole
Magnet
6 Pole Magnet
Purity
GB
RV750
H. STAT
C/CV Board
2. Tilt the 4 pole magnet and adjust static convergence to open or
close the 4 pole magnet.
When the 4 pole magnet is moved in the direction of arrow A and
B
, the red, green, and blue dots move as shown below:
A
B
A
B
G
R
B
B
G
R
Moved RV750 (H.STAT)
DY pocket
4 Pole
Magnet
4 Pole Magnet
RGGRB
KV-21FA350/21FA550
B
12
KV-21FA350/21FA550
Convergence Rough Adjustment
Before performing this adjustment, perform Horizontal and Vertical Static
Convergence Adjustment.
Input cross hatch pattern.
a) TLH
Adjust the horizontal convergence of red and blue dots by inserting
TLH Correction Plate to the DY pocket (left or right).
b) YCH
Adjust YCH to balance Y axis.
c) TLV
Adjust YCh to balance Y axis.
d) XCV
Adjust XCV to balance X-axis.
YCH
DY pocket
RB
YCH
TLV
B
R
TLV
DY pocket
R
B
TLH Plate
XCV
XCV
B
R
TLH
ON DY:
TLV
XCV
Screen Corner Convergence
Affi x a Piece A (90), Convergence Correct/Permaloy Assy Correction to
the misconverged areas.
ba
a-d : screen-corner
misconvergence
cd
b1
a1
d1
a1~d1:Piece A (90), Convergence Correct
Permaloy Assy Correction
or
c1
2-3. FOCUS
FOCUS adjustment should be completed before White Balance
adjustment. (See 4-4. White Balance Adjustment)
1. Receive digital monoscope pattern.
2. Set Picture Mode to “DYNAMIC”.
3. Adjust focus VR to obtain a just focus at the center of the screen.
4. Change the receiving signal to white pattern and blue back.
5. Confi rm magenta ring is not noticeable. In case magenta ring is
obvious, then adjust FOCUS VR to balance magenta ring and
FOCUS.
KV-21FA350/21FA550
FOCUS
SCREEN
13
2-4. SCREEN (G2)
1. Before beginning adustment procedure:
-Set Picture and Brightness to “STANDARD”.
-Set TV to Video mode.
-Set WHBL 016 “RGBB” to 01
2. Connect R, G, B of the C Board cathode to oscilloscope.
3. Adjust Brightness to obtain the cathode value to the value shown
below:
165 ± 2VDC
4. Adjust SCREEN VR on the FBT until the scanning line disappears.
5. Set WHBL 16 “RGBB” back to 00.
KV-21FA350/21FA550
KV-21FA350/21FA550
14
SECTION 3: CIRCUIT ADJUSTMENTS
Electrical Adjustments by Remote Commander
Use the Remote Commander (RM-YA005) to perform the circuit adjustments in this section.
Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
3-1. REMOTE ADJUSTMENT BUTTONS AND INDICATORS
DISPLAY
(Service Mode)
KV-21FA350/21FA550
MUTING
(Enter into
memory)
1
Display next
Item
2
Display next
Category
4
Display previous
Item
8
(Initialize)
VOLUME (+)
(Service Mode)
POWER
(Service Mode)
3
Increase
Data value
6
Decrease
Data value
5
Display previous
Category
ENTER
(Enter into
memory)
0
(Remove
from memory)
KV-21FA350/21FA550
RM-YA005
15
3-2. ACCESSING THE SERVICE MENU MODE
Use the remote commander to access the service meu mode and perform the following adjusments.
1. Standby mode (Power off).
2. Press the following buttons on the remote commander within a second of each other:
DISPLAY
Channel
5
Sound Volume +
The screen displays the fi rst service data category item.
POWER
KV-21FA350/21FA550
categoryin decimalitem namein decimalNGservice commandfrequencyvideo input name
1. On the Remote Commander press 2 to select the next category, or 5 to select the previous category.
2. Press 1 to select the next item, or 4 to select the previous item.
3. Press 3 to increase the data value, or 6 to decrease the data value.
4. Press
MUTING
then 0 to write into memory.
GREEN
GEOM000HPOS 039 SERVICE 50 VIDEO 1
write with [MUTING].
GREEN
GEOM000HPOS 039 WRITE 50 VIDEO 1
Write executed with -.
RED
GEOM000HPOS 039 WRITE 50 VIDEO 1
Resetting the User Menus
Use the following procedure to reset the User Menus to the factory default settings.
1. Access Service Adjustment Mode.
2. Press 8 then 0 on the Remote Commander.
“WRITE” displays when
saving changes
“WRITE” becomes red
when saving, then changes
to “SERVICE”
KV-21FA350/21FA550
16
KV-21FA350/21FA550
3-3. CONFIRMING SERVICE ADJUSTMENT
CHANGES
1. After completing adjustments, pull out the plug from the AC outlet,
then replace the plug in the AC outlet again.
2. Access Service Adjustment Mode.
3. Using the buttons on the Remote Commander, locate the adjusted
items again to confi rm they were adjusted.
3-4. WHITE BALANCE ADJUSTMENTS
NOTE: FOCUS adjustment should be completed before White Balance
adjustment. (See 2-3. FOCUS)
1. Access Service Mode.
2. Input white raster signal using signal generator.
3. Set the following condition:
Picture “DYNAMIC”, PICT 006, note value of “WTS”
then change to 00.
4. Press 2 or 5 to select the WHBL category.
5. Press 1 or 4 to display the 03 “GDRV” and 04 “BDRV” items.
6. Press 3 or 6 to adjust for the best white balance.
7. At Cutoff, select WHBL 000 “BKOR” and 001 “BKOG” and adjust
the data.
8. Perform adjustment at Highlight and Cutoff condition until it reaches
its target.
9. Press
10. Set PICT 006 “WTS” back to its original data.
MUTING
then
ENTER
to save into the memory.
10. Set “PWL” and “BLBG” back to initial data.
(“PWL”: 01h and “BLBG”: 00h)
11. Press
Sub Color Adjustment
1. Set TV to Video mode.
2. Set Picture mode to “CUSTOM”.
3. Input PAL 100% Color Bar (CB) to TV set (OTHER MODEL).
4. INPUT NTSC 75% CB to TV set (NTSC MODEL).
5. Set PICT 006 “WTS” to 00h and Intelligent Picture to “OFF”.
6. Set the following condition:
PICTURE 50%, COLOR 50%, BRIGHTNESS 50%, HUE 50%,
7. Connect an oscilloscope to pin
8. Press
MUTING
SHARPNESS 50%
1
or 4 to select SADJ 004 “SCOL”, then adjust
B2=VB3=VB4
V
6
, then write in the data +5 step offset.
VB1
VB2 VB3 VB4VB1 VB2 VB3 VB4
VB2 = VB3 = VB4 (for PAL)VB1 = VB4 (for NTSC)
then 0 to write into memory.
2
(B Output) of CN004.
(for PAL),
VB1 = VB4 (for NTSC)
(Difference is within 70mV)
by pressing
3
or
3-5. PICTURE QUALITY ADJUSTMENTS
P Max/Contrast Adjustment
1. Set TV to Video mode.
2. Set Picture mode to “CUSTOM”.
3. Input PAL 100% CB to TV set (OTHERS), NTSC 75% CB (NTSC
model).
4. Set PICT 003 “PWL” to 00h WHBL 017 “BLBG” to 01h.
5. Set the following condition:
PICTURE 100%, COLOR 0%, BRIGHTNESS 50%
6. Connect an oscilloscope to pin
1
7. Press
pressing 3 or 6 until the spec below:
or 4 to display SADJ 000 “PMAX”, then adjust VR by
1.46 ± 0.03 Vp-p = For 21" without VM models
1.65 ± 0.03 Vp-p = With VM models except NTSC models
1.23 ± 0.03 Vp-p = NTSC models VM models
1.10 ± 0.03 Vp-p = For 21" NTSC non VM models
4
(R Output) of CN004.
VR
Black
9. Press
10. Set “WTS” back to original data and Intelligent Picture to “ON”.
11. Copy no.9 data to PAL TV & DVD mode.
MUTING
then 0 to write into memory.
Sub Hue Adjustment
1. Set TV to Video mode.
2. Set Picture mode to “CUSTOM”.
3. Input NTSC 3.58 CB to TV set.
4. Set the following condition:
PICTURE 50%, COLOR 50%, BRIGHTNESS 50%, HUE 50%,
SHARPNESS 50%
5. Press 1 or 4 to select service mode and - 5 step offset from SADJ
004 “SCOL”.
6. Connect oscilloscope to pin
7. Press 1 or 4 to select SADJ 001 “SHUE”, then press 3 or 6 to
adjust the data.
8. Press
9. Press 1 or 4 to select SADJ 004 “SCOL” and +5 step offset, then
10. Select TV channel with 3.58 and repeat item (3) to (7) and +1 step
11. Press
MUTING
press
MUTING
data offset.(NTSC model)
MUTING
then 0 to write into memory.
then 0 to write into memory .
then 0 to write into memory.
2
(B output) of CN004.
8. Select Wide Mode to “ON” in TV and Video mode and write “PMAX”
data - 8 steps (for models with V-Compression features only).
9. Press
MUTING
then 0 to write into memory.
KV-21FA350/21FA550
17
KV-21FA350/21FA550
12. For single system model with NTSC 4.43, select TV channel with
NTSC 4.43 and repeat items (3) to (8)
VB3
VB1
VB2
VB4
80mV
The highest level of VB1, VB2, VB3, VB4
must be aligned at the same time.
The ideal difference between
V
B2 and VB3 is within ± 80mV
13. Once adjustment is completed in Video mode, carry out adjustment
in DVD mode. Set TV to DVD mode. Input NTSC 3.58 CB to DVD
set and perform steps 4 to 9 and 11.
Sub Bright Adjustment
1. Set TV to RF mode.
2. Input PAL monoscope to RF mode.
3. Set Brightness 50% and Picture to “MINIMUM”.
4. Press 1 (or 4) to select WHBL 010 “SBRT”.
5. Press 3 to increase the data value, or 6 to decrease the data value
so that the cut-off level is 10 IRE, slightly glimmer: 20 IRE.
6. Press
MUTING
then 0 to write into memory.
PAL 50Hz Normal Mode
1. Input PAL signal 50Hz in the Service Mode.
2. Set Wide Mode to “OFF”.
3. Perform the below adjustments using the “General Setting”
sequence.
Item No.FunctionIllustration
GEOM 013Vertical Shift
(VPOS)
GEOM 011Vertical Amplitude
(VSIZ)
GEOM 000Horizontal Shift
(HPOS)
GEOM 009EW Trapezoid
(EWTZ)
GEOM 005EW Width (EW)
(HSIZ)
GEOM 002Horizontal Bow
(HBOW)
Note: Adjust VSIZ to
Note: Adjust HSIZ to
±
(SPCB)
12.4
(PAL Monoscope)
±
11. 3
±
(NTSC Monoscope)
11. 5
±
(SPCB)
16.4
±
(PAL Monoscope)
14.6
±
(NTSC Monoscope)
15.3
Geometry Adjustment
Geometry adjustment must be done for both color systems PAL and
NTSC.
General Setting
1. Input Monoscope or Special Color Bar (SPCB) signal using a
pattern generator.
2. Access Service Mode.
3. Select the category item that needs adjusting by pressing 1 or
4. Press 3 to increase the data value, or 6 to decrease the data
value.
5. Press
MUTING
then 0 to write into memory.
NOTE: Geometry Adjustment must be performed for 4 different modes:
PAL 50Hz NORMAL MODE,
PAL 50Hz WIDE MODE,
NTSC 60Hz NORMAL MODE,
NTSC 60Hz WIDE MODE.
4
GEOM 006EW Parabola/Width
(EWPW)(PW)
GEOM 007EW Upper Corner
(UCOP)Parabola
GEOM 008EW Lower Corner
(LCOP)Parabola
GEOM 001Horizontal
(HPAR)Parallelogram
GEOM 012S-Correction(SC)
(SCOR)
GEOM 003Vertical Linearity
(VLIN)
GEOM 004Vertical Scroll
(VSCR)
4. After completing the adjustments for PAL 50Hz NORMAL MODE,
set Wide mode to “ON”, and copy all PAL 50Hz NORMAL MODE
adjusted data to PAL 50Hz WIDE MODE except VSCR.
5. Complete the adjustment for NTSC 60Hz NORMAL MODE.
6. Set Wide mode to “OFF”.
7. Complete the adjustment items listed in the above table using the
“General Setting” sequence.
8. After completing the adjustments set Wide mode to “ON” and copy
all NTSC 60Hz NORMAL MODE adjusted data to NTSC 60Hz
WIDE MODE except VSCR.
9. After completing all the adjustments, reconfi rm VSIZ and VPOS.
Black Level Offset R (OFB = 00), Offset B (OFB = 01)3131313131
Black Level Offset G3131313131
White Point R3737373737
White Point G3737373737
White Point B3737373737
RGB Gain Preset01
Preset Gain R (PGR) 50
Preset Gain G (PGG) 50
Preset Gain B (PGB) 50
Preset Gain Offset15
Sub-Brightness
Sub-Brightness Offset (Intelligent Pic)02
Control Sequence of Beam Current Limiting00
RGB Blanking00
Blanking of Blue & Green Output00
Black Level Offset Blue01
Color Temp setting (0:High , 1:Normal , 2,3: Low)
Black Level Offset R (OFB = 00), Offset B (OFB = 01)31
Black Level Offset G31
White Point R37
White Point G37
White Point B37
RGB Gain Preset
Preset Gain R (PGR)
Preset Gain G (PGG)
Preset Gain B (PGB)
Preset Gain Offset
Sub-Brightness313131
Sub-Brightness Offset (Intelligent Pic)
Control Sequence of Beam Current Limiting
RGB Blanking
Blanking of Blue & Green Output
Black Level Offset Blue
Color Temp setting (0:High , 1:Normal , 2,3: Low)0001
Black Level Offset R (OFB = 00), Offset B (OFB = 01)
Black Level Offset G
White Point R
White Point G
White Point B
RGB Gain Preset
Preset Gain R (PGR)
Preset Gain G (PGG)
Preset Gain B (PGB)
Preset Gain Offset
Sub-Brightness3131
Sub-Brightness Offset (Intelligent Pic)
Control Sequence of Beam Current Limiting
RGB Blanking
Blanking of Blue & Green Output
Black Level Offset Blue
Color Temp setting (0:High , 1:Normal , 2,3: Low)02
Col Temp
Initial Value
50pal(Video)50pal(TV)YUV
TVVideoPic Mode 2 (CUSTOM)
Pic mode 0
(VIVID)
Pic mode 1
(STANDARD)
KV-21FA350/21FA550
20
TVJFunction
SADJ
000
PMAX
001
SHUE
Sub-Hue
002
SSHP
Sub-Sharpness
003
SSHO
Sub-Sharpness Offset (Intelligent Pic)
004
SCOL
Sub-Color
005
SCOO
Sub-Color Offset (Intelligent Pic)
006
PIC
Picture Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)]
007
COL
Color Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)]
6(invalid)]
send to TINT #1Eh(5-0) with US model)
Functionality
Common
Initial Value
YUV
50secam(TV)
50secam(Video)
TV
Video
50pal(TV)
50pal(Video)
SADJ
000
PMAX
001
SHUE
Sub-Hue
002
SSHP
Sub-Sharpness
003
SSHO
Sub-Sharpness Offset (Intelligent Pic)
004
SCOL
Sub-Color
005
SCOO
Sub-Color Offset (Intelligent Pic)
006
PIC
Picture Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit
007
COL
Color Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit
6(invalid)]
(* send to TINT #1Eh(5-0) with US model)
60YUV
50RGB
60RGB
50YUV
60ntsc(TV)
60ntsc(Video)
60palm(TV)
60palm(Video)
Functionality
Initial Value
SADJ
000
PMAX
001
SHUE
Sub-Hue
002
SSHP
Sub-Sharpness
003
SSHO
Sub-Sharpness Offset (Intelligent Pic)
004
SCOL
Sub-Color
005
SCOO
Sub-Color Offset (Intelligent Pic)
006
PIC
Picture Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)]
80
007
COL
Color Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)]
6(invalid)]
send to TINT #1Eh(5-0) with US model)
Functionality
Initial Value
CategoryNo.Name
Picture Maximum
Brightness Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit
008BRT
Hue Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)] (*
009HUE
010SHP
TVJFunction
CategoryNo.Name
Sharpness Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit
6(invalid)]
Picture Maximum
KV-21FA350/21FA550
42
06
31310031
02
Brightness Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit
008BRT
Hue Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)]
009HUE
010SHP
TVJFunction
CategoryNo.Name
008BRT
009HUE
010SHP
Sharpness Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit
6(invalid)]
Picture Maximum37373737
Brightness Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit
Hue Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)] (*
Sharpness Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit
6(invalid)]
Peaking Center Frequency and Delay01
Ratio Pre & Over Shoot 02
Ratio of Positive & Negative Peaks 03
Y-Delay098 09NIL09
PAL-SECAM or NTSC (Japan/USA) Matrix01
Automatic Color Limiting01
Chroma Bandpass Center Frequency00
SECAM Black Offset00
PAL/NTSC Ident Sensitivity02
Center Frequency of Cloche(Bell) Filter00
Chroma Trap Mode00
Second Chroma Trap00
Bypass of Chroma Base-band Delay Line 00
Base-Band Tint Control3131
Tint Control on UV Signals00
Bandwidth at YC mode for 3.58 MHz color system (BWYC)00
Width of internal burstkey pulse of chroma demodulator (OSB)00
Burst Key Position000000
Peaking Center Frequency and Delay00
Ratio Pre & Over Shoot 03
Ratio of Positive & Negative Peaks03
Y-Delay090209
PAL-SECAM or NTSC (Japan/USA) Matrix
Automatic Color Limiting
Chroma Bandpass Center Frequency
SECAM Black Offset
PAL/NTSC Ident Sensitivity
Center Frequency of Cloche(Bell) Filter
Chroma Trap Mode 01
Second Chroma Trap00
Bypass of Chroma Base-band Delay Line01
Base-Band Tint Control31
Tint Control on UV Signals
Bandwidth at YC mode for 3.58 MHz color system (BWYC)
Width of internal burstkey pulse of chroma demodulator (OSB)
Burst Key Position
Common
NTSC(Video)SECAM(Video)
OthersPAL(Video)
PAL(TV)NTSC(TV)SECAM(TV)YUV
SECAMNTSCTVS-INPUT
KV-21FA350/21FA550
22
KV-21FA350/21FA550
007
MVK
Initial Value
007
MVK
Initial Value
011
AAS
Initial Value
011
AAS
Initial Value
TVJFunction
CategoryNo.Name
SYNC000SYS
TVJFunction
CategoryNo.Name
SYNC000SYS
Functionality
001FO
002VID
003FSL
004SSL
005SVID
006FORF
Functionality
001FO
002VID
003FSL
004SSL
005SVID
006FORF
Synchronization on YSYNC Input00
Phase 1 Time Constant0303
Video Ident Mode0000
Forced Slicing Level for Vertical Sync00
Slicing Level Sync Separator0000
Source Selection for Video Identification0000
Forced Field Frequency01
Macro Vision Keying01
Synchronization on YSYNC Input
Phase 1 Time Constant00
Video Ident Mode
Forced Slicing Level for Vertical Sync
Slicing Level Sync Separator
Source Selection for Video Identification
Forced Field Frequency
Macro Vision Keying
Cathode Drive Level00
Comb Filter Mode00
Soft Clipping Level00
Peak White Limiting Switch01
Peak White Limiting00
Gamma00
Gamma Control and White Stretch0101
DC Transfer Ratio of Luminance Signal0101
Coring000000
Coring Offset (Intelligent Pic)02
Black Stretch02
Black Area to Switch off the Black Stretch01
Cathode Drive Level
Comb Filter Mode
Soft Clipping Level
Peak White Limiting Switch
Peak White Limiting
Gamma
Gamma Control and White Stretch
DC Transfer Ratio of Luminance Signal
Coring
Coring Offset (Intelligent Pic)
Black Stretch
Black Area to Switch off the Black Stretch
Common
OthersRGBLive
TV(Others)Video(Dyn)Video(Others)
Color Temp (LOW)Color Temp (NORMAL)Color Temp (HIGH)Color Temp (Others)
Offset IF Demodulator
AGC Take-over31
Search Tuning Mode01
Group Delay on CVBS1 Signal00
IF AGC Speed
Fast Filter IF PLL00
RF Amp LNA bit initial value00
RF Amp Threshold Level
RF Amp SN Level Threshold
RF Amp SN Level Drop Threshold
RF Amp check SN Drop Timing
Channel Threshold after Auto Prg to set RF Amp User Mode25
Sony Tuner used
Delay of RGB Output to VM Output04
Amplitude of VM Output00
VM setting (0:High , 1:Low , 2,3: OFF)000100
VM Mode01
Coring on SVM00
TVVideoYUV
Common
35
00
195
03
01
30
00
Common
Pic mode 0
Initial Value
OTHERSTVPic mode 1Pic Mode 2
TVJFunction
CategoryNo.Name
SDEM000FMWS
TVJFunction
CategoryNo.Name
TXT000TXV
Functionality
001QSS
002BPB
003HPVC
004CMCA
Functionality
001
002
003
THDTeletext H-sync Active Edge Shift00
TBRTeletext RGB Brightness00
ACQTeletext Acquisition (Auto-0, PAL-1)00
TBRM Teletext Mix Mode Brightness00
Window Selection for FM Demodulator02
Quasi Split Sound (QSS) Amplifier Mode(N/A for GA multi M system)01
Bypass of Sound Bandpass Filter00
Head Phone Volume Control00
Activate Mono Channel00
Bypass of sound bandpass filter at stereo mode (BPBS)01
LAAADC Level Adjust0000
SEFIncredible Mono/Stereo Effect
BASMain Bass Offset19
TREMain Treble Offset19
EQ1Equalizer Main Channel Band (100 Hz) Offset18
EQ2Equalizer Main Channel Band (300 Hz) Offset18
EQ3Equalizer Main Channel Band (1000 Hz) Offset17
EQ4Equalizer Main Channel Band (3000 Hz) Offset19
EQ5Equalizer Main Channel Band (8000 Hz) Offset21
BFCTDBE, DUB and BBE Control00
SCEN SRS3D Center Control04
SSPA SRS3D Space Control01
BBHW BBE process offset in WOW mode00
STRE Treble Offset for surround mode01
BBHT BBE Offset in TV mode00
TTRETreble Offset in TV Mode02
VBAS Bass Offset depend on user volume01
VTRE Treble Offset depend on user volume01
TBAS Bass Offset for TV00
BBLO BBL Offset depend on User Volume3
BBHO BBH Offset Depend on Use Volume3
LAAADC Level Adjust
SEFIncredible Mono/Stereo Effect0503
BASMain Bass Offset
TREMain Treble Offset
EQ1Equalizer Main Channel Band (100 Hz) Offset
EQ2Equalizer Main Channel Band (300 Hz) Offset
EQ3Equalizer Main Channel Band (1000 Hz) Offset
EQ4Equalizer Main Channel Band (3000 Hz) Offset
EQ5Equalizer Main Channel Band (8000 Hz) Offset
BFCTDBE, DUB and BBE Control
SCEN SRS3D Center Control
SSPA SRS3D Space Control
BBHW BBE process offset in WOW mode
STRE Treble Offset for surround mode
BBHT BBE Offset in TV mode
TTRETreble Offset in TV Mode
VBAS Bass Offset depend on user volume
VTRE Treble Offset depend on user volume
TBAS Bass Offset for TV
BBLO BBL Offset depend on User Volume
BBHO BBH Offset Depend on Use Volume
SPTL Lower Threshold for SAP carrier detection15
SPTH Noise Threshold for automute of SAP09
SPHY Hysteresis size for automute of SAP03
FMTH Noise Threshold for automute of SC2 in FM A2 standard00
FMHY Hysteresis size for automute of SC2 in FM A2 standard04
RFULRF Signal Change Counter after Unlocked (Disable when 0fh)01
RFLKRF Signal Change Counter after Locked (Disable when 0fh)04
LANG OSD language shipping condition01
DCXO DCXO Value
DISCtarget DISCO data for DCXO adjust by color dec
AVUL AV Signal Change Counter after Unlocked (Disable when 0Fh)04
AVLKAV Signal Change Counter after Locked (Disable when 0Fh)00
SENH Sound Enhancer Crackling sound c/m (0:Off, 1:On)01
SPSC SPEED search (0: disable, 1:4times, 2:6times, 3:8times)01
MULO Audio Mute Port Logic Selection (0:Active High, 1:Active Low)01
No Signal Mute Switch (1 = enabled)01
sync separator sw
Sync sw
Extended Blanking Timer to Eliminate White Noise.06
Memorize TV Sys in NVM at Test Reset [0:B/G, 1:I, 2:D/K, 3:M] (GA Model) 03
Signal Booster Shipping/Test Reset condition (1: Auto, 0:Off)00
Common
01
47
128
(4:3) 50(4:3) 60YUV
Others
0000
KV-21FA350 ONLY
TVJFunction
CategoryNo.Name
OPTB001
KV-21FA550 ONLY
TVJFunction
CategoryNo.Name
OPTB001
Functionality
OPB1Option 1 (System related)40
002
003
004
002
003
004
OPB2Option 2 (Video Signal related)105
OPB3Option 3 (Stereo Decoding related)4
OPB4Option 4 (Miscellaneous)24
OPB5Option 5 (Miscellaneous)3
OPB6Option 6 (OSD Language related)1
Functionality
OPB1Option 1 (System related)10
OPB2Option 2 (Video Signal related)105
OPB3Option 3 (Stereo Decoding related)4
OPB4Option 4 (Miscellaneous)28
OPB5Option 5 (Miscellaneous)3
OPB6Option 6 (OSD Language related)1
Common
Common
TVJFunction
CategoryNo.Name
OPUS000
TVJFunction
CategoryNo.Name
OPFM000
Functionality
SOFF stay off (0: follow last memory with AC on, 1: standby with AC on)01
001
002
003
004
005OUV
006CFA2
001
002
003
004
005
006
007
008
010
SPCH Channel Number after Shipping Condition6
SPCA Cable Selection after Shipping Condition (1 = Cable On)01
CCBR CC Brightness (only for US)20
CCHP CC H position (only for US)13
Functionality
FMCT FM Radio Auto Scan Carrier Threshold20
RPST Waiting time for each frequency step during radio preset10
MPTU Upper Threshold for MPX pilot detection (FM_RADIO)12
DCOU Upper threshold for DC offset from FM demodulator140
DCOL Lower threshold for DC offset from FM demodulator114
OVMA FM overmodulation adaption (FM_RADIO)00
FMBR OSD Brightness during FM Mode12
RTRE Treble Offset in FM Radio Mode03
RBAS Bass Offset in FM Radio Mode02
AGCT ACG takeover in FM Radio Mode32
FLBW FM/AM demodulator filter bandwidth01
STDS
Offset Control on UV Input Signals (only for NTSC model)
Forced Comb Filter On (only for NTSC model)00
H Sync Selection for Tuning (SL, LOCK or SID) only for US01
Initial Value
Common
Common
01
KV-21FA350/21FA550
27
4-1. CIRCUIT BOARDS LOCATION
CV Board
A Board
KV-21FA350/21FA550
SECTION 4: DIAGRAMS
H2 Board
4-2. PRINTED WIRING BOARD AND
J4 Board
SCHEMA
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
/
W in resistance, 1/
4
: nonfl ammable resistor.
: fusible resistor.
: internal component.
: panel designation and adjustment for repair.
: earth ground
: earth-chassis
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.
TIC DIAGRAM INFORMATION
W and 1/
10
W in chip resistance.
8
W Board
All voltages are in V.
S : Measurement impossibillity.
: B+line.
: B-line.
(Actual measured value may be different).
: signal path. (RF)
Circled numbers are waveform references.
The components identifi ed by shading and
safety. Replace only with part number specifi ed.
The symbol indicates a fast operating fuse and is displayed on
the component side of the board. Replace only with fuse of the same
rating as marked.