SONY KV-20FS120, KV-21FM120, KV-21FS120, KV-21FA310, KV-24FS120 Service Manual

HISTORY INFORMATION FOR THE FOLLOWING MANUAL:

SERVICE MANUAL

MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.

KV-20FS120
KV-20FS120
KV-21FM120
KV-21FS120
KV-21FS120
KV-21FA310
KV-21FA310
KV-24FS120
KV-24FS120

RM-Y194 US SCC- S61K-A

RM-Y194 CND SCC- S59H-A

RM-W151 LATIN NORTH SCC- S60X-A

RM-Y194 LATIN NORTH SCC- S60Y-A

RM-Y194 LATIN SOUTH SCC- S73A-A

RM-Y180 LATIN NORTH SCC- S60T-A

RM-Y180 LATIN SOUTH SCC- S60U-A

RM-Y194 US SCC- S61L-A

RM-Y194 CND SCC- S59J-A

BA-6

CHASSIS

KV-25FS120
KV-25FS120

RM-Y194 LATIN NORTH SCC- S73B-A

RM-Y194 LATIN SOUTH SCC- S73C-A

ORIGINAL MANUAL ISSUE DATE: 3/2004

:UPDATED ITEM

☛

REVISION DATE SUBJECT

3/2004 No revisions or updates are applicable at this time.
4/2004 Corrected HV Hold-Down PN Replaced Page 17 and Page 37
Removed critical mark on SPACER, DY Replaced Page 52, Page 54 and Page 56
Corrected screw placement for Speaker Assy Replaced Page 56
Added Remote Control Battery Cover PNs for RM-Y194 and RM-W151 Replaced Page 80
3/2005 Corrected Remote Control Battery Cover PN for RM-Y194 Replaced Page 80
7/2005 Updated A Board Schematic to correct Y signal. Replaced Page 39

9-965-959-04

TRINITRON® COLOR TELEVISION

Self Diagnosis

Supported model

SERVICE MANUAL

MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.

KV-20FS120
KV-20FS120
KV-21FM120
KV-21FS120
KV-21FS120
KV-21FA310
KV-21FA310
KV-24FS120
KV-24FS120

RM-Y194 US SCC- S61K-A

RM-Y194 CND SCC- S59H-A

RM-W151 LATIN NORTH SCC- S60X-A

RM-Y194 LATIN NORTH SCC- S60Y-A

RM-Y194 LATIN SOUTH SCC- S73A-A

RM-Y180 LATIN NORTH SCC- S60T-A

RM-Y180 LATIN SOUTH SCC- S60U-A

RM-Y194 US SCC- S61L-A

RM-Y194 CND SCC- S59J-A

BA-6

CHASSIS

KV-25FS120
KV-25FS120

KV-24FS120 KV-21FA310

RM-Y194 LATIN NORTH SCC- S73B-A

RM-Y194 LATIN SOUTH SCC- S73C-A

9-965-959-04

TRINITRON® COLOR TELEVISION

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

TABLE OF CONTENTS

SECTION TITLE PAG E

Specifi cations ............................................................................................................................................................................. 4

Warnings and Cautions .............................................................................................................................................................. 6

Safety Check-Out ....................................................................................................................................................................... 7

Self-Diagnostic Function............................................................................................................................................................. 8

SECTION 1: DISASSEMBLY........................................................................................................................................................... 10

1-1. Rear Cover Removal (All Except KV-21FA310)............................................................................................................... 10

1-2. Rear Cover Removal (KV-21FA310 Only)........................................................................................................................ 10

1-3. Chassis Assembly Removal ..............................................................................................................................................11

1-4. Service Position ................................................................................................................................................................11

1-5. Picture Tube Removal ...................................................................................................................................................... 12

Anode Cap Removal Procedure....................................................................................................................................... 12

SECTION 2: SET-UP ADJUSTMENTS............................................................................................................................................ 13

2-1. Beam Landing .................................................................................................................................................................. 13

2-2. Convergence.................................................................................................................................................................... 14

2-3. Focus ............................................................................................................................................................................... 15

2-4. Screen (G2)...................................................................................................................................................................... 16

2-5. Method of Setting the Service Adjustment Mode ............................................................................................................. 16

2-6. White Balance Adjustments ............................................................................................................................................. 16

SECTION 3: SAFETY RELATED ADJUSTMENTS......................................................................................................................... 17

3-1.

X

R565 Confi rmation Method (HV Hold-Down Confi rmation) and Readjustments ........................................................ 17

3-2. B+ Voltage Confi rmation and Adjustment ........................................................................................................................ 17

SECTION 4: CIRCUIT ADJUSTMENTS.......................................................................................................................................... 19

4-1. Setting the Service Adjustment Mode .............................................................................................................................. 19

4-2. Memory Write Confi rmation Method ................................................................................................................................ 19

4-3. Remote Adjustment Buttons and Indicators ..................................................................................................................... 19

4-4. Service Data Lists ............................................................................................................................................................ 20

4-5. ID Map Table .................................................................................................................................................................... 34

4-6. A Board Adjustments........................................................................................................................................................ 34

SECTION 5: DIAGRAMS................................................................................................................................................................. 37

5-1. Circuit Boards Location .................................................................................................................................................... 37

5-2. Printed Wiring Board and Schematic Diagram Information.............................................................................................. 37

5-3. Block Diagram and Schematics ....................................................................................................................................... 38

A Board Schematic Diagram............................................................................................................................................ 39

HB Board Schematic Diagram (All Except KV-21FA310)................................................................................................ 41

HR Board Schematic Diagram (KV-21FA310 Only) ........................................................................................................ 44

CV Board Schematic Diagram ......................................................................................................................................... 45

K Board Schematic Diagram (KV-21FA310 Only) ............................................................................................................ 49

5-4. Semiconductors ............................................................................................................................................................... 51

SECTION 6: EXPLODED VIEWS.................................................................................................................................................... 52

6-1. Picture Tube (KV-20FS120/21FS120 Only) ..................................................................................................................... 52

6-2. Chassis (KV-20FS120/21FS120 Only)............................................................................................................................. 53

6-3. Picture Tube (KV-21FM120 Only) .................................................................................................................................... 54

6-4. Chassis (KV-21FM120 Only)............................................................................................................................................ 55

6-5. Picture Tube (KV-21FA310 Only) ..................................................................................................................................... 56

6-6. Chassis (KV-21FA310 Only) ............................................................................................................................................ 57

6-7. Picture Tube (KV-24FS120/25FS120 Only) ..................................................................................................................... 58

6-8. Chassis (KV-24FS120/25FS120 Only)............................................................................................................................. 59

SECTION 7: ELECTRICAL PARTS LIST....................................................................................................................................... 60

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

3

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

R

p

)

p

R

p

)

p

SPECIFICATIONS

KV-20FS120 KV-21FM120 KV-21FS120 (N) KV-21FS120 (S)

Power Requirements 120V, 60Hz 120V, 60Hz 120V, 60Hz 220V, 50/60Hz
Number of Inputs/Outputs

eaker Output(W

S

Power Consumption (W)

In Standby (Max)

Dimensions (W x H x D)

Mass

S Video
Y,P

Audio Out

Head

In Use (Max) 140W 125W 140W 135W

Video

, P

B

Audio

1)

2)

3)

4)

5)

2222
0000
1011
4244
0000

10W x 2 5W x 2 10W x 2 10W x 2

hones

6)

mm 631 x 468 x 490.5 mm 631 x 468 x 490.5 mm 631 x 468 x 490.5 mm 631 x 468 x 490.5 mm

24

in

1111

1W 1W 1W 1W

7/8

x 18 3/8 x 19

1/4

in 24

7/8

x 18 3/8 x 19

1/4

in 24

7/8

x 18 3/8 x 19

1/4

in 24

7/8

x 18 3/8 x 19

kg 25.2 kg 25.2 kg 25.2 kg 25.2 kg

lbs 55 lbs 9 oz 55 lbs 9 oz 55 lbs 9 oz 55 lbs 9 oz

1/4

in

KV-21FA310 (N) KV-21FA310 (S)

KV-24FS120

KV-25FS10 (N)

KV-25FS120 (S)

Power Requirements 120V, 60Hz 220V, 50/60Hz 120V, 60Hz 220V, 50/60Hz
Number of Inputs/Outputs

eaker Output(W

S

S Video
Y,P

Audio Out

Subwoofer

Head

Video

, P

B

Audio

hones

1)

2)

3)

4)

5)

2222
1111
1111
4444
1111

5W x 3 5W x 3 10W x 2 10W x 2

15W 15W NA NA

1111

Power Consumption (W)

In Use (Max) 155W 150W 165W 160W

In Standby (Max)

6)

1W 1W 1W 1W

Dimensions (W x H x D)

mm 609 x 540 x 503 mm 609 x 540 x 503 mm 718 x 526.5 x 480 mm 718 x 526.5 x 480 mm

in

24 x 21

1/4

3/4

x 19

in 24 x 21

1/4

x 19

3/4

in 28

1/4

x 20

3/4

x 18

7/8

in 28

1/4

x 20

3/4

x 18

Mass

kg 28.6 kg 28.6 kg 32.8 kg 32.8 kg

lbs 63 lbs 63 lbs 72 lbs 5 oz 72 lbs 5 oz

1) 1 Vp-p 75 ohms unbalanced, sync negative

2) Y: 1 Vp-p 75 ohms unbalanced, sync negative

C: 0.286 Vp-p (Burst signal), 75 ohms

3) Y: 1.0 Vp-p, 75 ohms unbalanced, sync negative;

PB: 0.7 Vp-p, 75 ohms

PR: 0.7 Vp-p, 75 ohms

4) 500 mVrms (100% modulation), Impedance: 47 kilohms

5) More than 408 mVrms at the maximum volume setting (variable)

More than 408 mVrms (fi x); Impedance (output): 2 kilohms

6) This specifi cation is maximum wattage.

7/8

in

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

4

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Television system

American TV standard, NTSC

Channel coverage

VHF: 2-13/ UHF: 14-69/ CATV: 1-125

Picture tube

FD Trinitron® tube

Visible screen size

20-inch picture measured diagonally

(KV-20FS120/21FM120/21FS120/21FA310 Only)

24-inch picture measured diagonally

(KV-24FS120/25FS120 Only)

Actual screen size

21-inch measured diagonally

(KV-20FS120/21FM120/21FS120/21FA310 Only)

25-inch measured diagonally

(KV-24FS120/25FS120 Only)

Antenna

75 ohm external terminal for VHF/UHF

Supplied Accessories

Remote Commander RM-Y194

(KV-20FS120/21FS120/24FS120/25FS120 Only)
Remote Commander RM-W151
(KV-21FM120 Only)
Remote Commander RM-Y180

(KV-21FA310 Only)
Two Size AA (R6) Batteries
Antenna, Telescopic

(KV-21FM120/21FS120/21FA310/25FS120 Only)

© 2004 Dolby Laboratories, Inc.
Dolby, Pro Logic, and the double-D symbol are registered
trademarks of Dolby Laboratories.

TruSurround

TruSurround is a trademark of SRS Labs, Inc. SRS and the SRS
symbol are registered trademarks of SRS Labs, Inc. in the United
States and in select foreign countries. SRS and TruSurround are
incorporated under license from SRS Labs, Inc. and are protected
under United States Patent Nos. 4,748,669 and 4,841,572 with
numerous additional issued and pending foreign patents. Pur­chase of this product does not convey the right to sell recordings
made with the TruSurround technology.

by SRS

™

®

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 and 4,482,866.

Design and specifi cations are subject to change without notice.

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

5

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

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.

ATTENTION!!

Apres avoir deconnecte le cap de l’anode, court-circuiter l’anode du tube cathodique et celui de l’anode du cap au chassis metallique
de l’appareil, ou la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.

Afi n d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.

! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!

Les composants identifi es par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces
sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants Sony dont le numero
de piece est indique dans le present manuel ou dans des supplements publies par Sony. Les reglages de circuit dont l’importance
est critique pour la securite du fonctionnement sont identifi es dans le present manuel. Suivre ces procedures lors de chaque
remplacement de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

6

SAFETY CHECK-OUT

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

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

0.15 F

1.5 K Ω

AC

Voltmeter

(0.75 V)

Earth Ground

Figure A. Using an AC voltmeter to check AC leakage. Figure B. Checking for earth ground.

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Trouble Light

AC Outlet Box

Ohmmeter

Cold-water Pipe

7

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

SELF-DIAGNOSTIC FUNCTION

Self Diagnosis

Supported model

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED 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/TIMER 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.

Diagnostic Test Indicators

When an error occurs, the STANDBY/TIMER LED will fl 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 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)*

STANDBY/ TIMER

No. of times

lamp fl ashes

Does not light

2 times

Self-Diagnositc

Display/

Diagnostic Result

2:0 or 2:1

Probable Cause Location

• Power cord is not plugged in.

• Fuse is burned out (F601). (A Board)

• H.OUT (Q506) is shorted. (A Board)
(20”/21” models only)
H.OUT (Q505) is shorted. (A Board)
(24”/25” models only)

• RGB Amp (IC1751) is shorted.
(CV Board)

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.

I-Prot

IK (AKB)

4 times

5 times

4:0 or 4:1

5:0 or 5:1

• +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.**

• 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.

*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.

Display of Standby/Timer LED Flash Count

2 times

4 times

5 times

LED ON 0.3 sec.

LED OFF 0.3 sec.

LED OFF

3 sec.

Standby/Timer LED

Diagnostic Item Flash Count*

+B Overcurrent 2 times
I-Prot 4 times
IK (AKB) 5 times
*One fl 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 fl ashing.

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

8

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

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.

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

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: +B OCP 0
3: +B OVP N/A
4: VSTOP 0
5: AKB 1
101: WDT N/A

8

ENTER

5

Sound Volume

Numeral “0” means that no fault was detected.

Numeral “1” means a fault was detected one time only.

-

Power ON

Note that this differs from entering the Service Mode (Sound Volume

+

).

Self-Diagnostic Circuit

FROM

CV BOARD

IC1751 PIN 5

A BOARD

IC001

Y/CHROMA JUNGLE

51

IK-AKBIN

A BOARD

IC545

V. OUT

REF

3

A BOARD

IC001

SYSTEM

IO-BDAT

78

I-Prot

53

A BOARD

IC002

MEMORY

5

BDA

FROM

72

A BOARD

IC561
PIN 7

+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 defl ection 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.

I-HLDWN

O-LED

79

DISPLAY

*(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

9

SECTION 1: DISASSEMBLY

1-1. REAR COVER REMOVAL (ALL EXCEPT KV-21FA310)

Rear Cover

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

3 screw +BVTP 3 x 12
(KV-20FS120/21FS120 Only)
1 Screw +BVTP 4X16
(KV-21FM120 Only)
3 screw +BVTP 3 x 10
(KV-24FS120/25FS120 Only)

1-2. REAR COVER REMOVAL (KV-21FA310 ONLY)

Sub Woofer

1

Lift to remove Sub-woofer.

2

Remove screws.

7 Screws +BVTP 4X16
(KV-20FS120/21FM120/21FS120 Only)
6 Screws +BVTP 4X16
(KV-24FS120/25FS120 Only)

Rear Cover

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

4 screw +BVTP 3 x 10

7 Screws +BVTP 4X16

10

1-3. CHASSIS ASSEMBLY REMOVAL

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Claw

1-4. SERVICE POSITION

1

Push down on clips to release K Board, then unplug the 2 pin
woofer connector and move out of the way.

2

Press on catch tab to release A Board.

Disconnect remaining cables to allow A Board to be removed.

3

Chassis Assembly

A Board

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

CV Board

11

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

1-5. 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

9

6

2

5

10

8

1. Discharge the anode of the CRT and remove the anode cap.

2. Unplug all interconnecting leads from the defl ection yoke, neck

7

3

4

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].

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

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

12

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

SECTION 2: SET-UP ADJUSTMENTS

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: Pro
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 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

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.

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.

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Purity control

corrects this area.

Disk magnets
or rotatable disk
magnets correct

these areas (a-d).

Deflection yoke positioning

b

d

a

b

cd

corrects these areas.

a

c

13

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

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).

Center dot

RV1750

R

B

G

V.STAT

R
G
B

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 insuffi cient H.Static convergence.

2. Rotate BMC magnet (b) to correct insuffi cient V.Static convergence.

3. After adjusting the BMC magnet, repeat Beam Landing Adjustment.

V. STAT

BMC MAGNET

PURITY

V.STAT magnet

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:

1

a

b

2

a

a

b

B
G

R

b

b

B

G

R

a

RGB

b

BGR

b

BMC magnet

a

3

b

a

a

R

G

b

b

B

G

B

R

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

14

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-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

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

TLV

(TLV)

(YHC, TLV) 20"/21" Models

(TLV, XCV, YCH, TLV) 24"/25" Models

XCV

YCH

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

15

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

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

Sound Volume

5

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.

ENTER

1

and 4 .

1

and 4.

to save into the memory.

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

10. Press

3

and 6 for the best white balance.

MUTING

then

Service Adjustment Mode On

1. The CRT displays the time being adjusted.

2. Press

3. Press

4. Press

Display

hsiz 16

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 hsiz 16

ntsc

vchp 00000000 00000000

Display

Item

write

Item
Data

MUTING

ENTER

Green

Red

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

16

SECTION 3: SAFETY RELATED ADJUSTMENTS

3-1. X R565 CONFIRMATION METHOD

(HV HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

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

.

The following adjustments should always be performed when replacing
the following components which are marked with
diagram:

Part Replaced (Y) Adjustment (X)

DY, T585, CRT, IC001, IC561,
IC600, C506, C507, C508, T511,
L510, C588, L588, C566, C561,
C563, D567, D568, D566, PH602,
R567, R568, R565, R566, R562,

R563, R561, R528……....A Board

Y

on the schematic

HV HOLD-DOWN
R565

☛

Preparation Before Confi rmation

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 97 VDC for 20”/21” models, or 105 VDC for 24”/25”
models.

Hold-Down Operation Confi rmation

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 135.6 ± 1VDC.

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 < 117.0 VDC) for 20”/21” models
(standard < 138.0 VDC) for 24”/25” models.

8. Input a white signal and set PICTURE and BRIGHTNESS to
maximum: IABL = 1350 ± 100µA for 20”/21” models or
IABL = 1650 ± 100µA for 24”/25” models

9. Repeat steps 4 through 7.

T585

FBT

Ammeter

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 IC600, 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 =135.6
± 1VDC.

5. If step 4 is not satisfi ed, replace the components listed above, then
repeat steps 1 through 3.

Y

on the

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

17

(

)

FIGURE 1

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

DIGITAL
MULTIMETER

+

-

X

R565

R

5

3

1

0

4

S

P

R

5

1

1

J

R

1

R

4

3

7

9

0

6

R

C

4

5

1

C

5

2

D

5

6

6

5

2

R

5

8

9

2

P

T

4

2

L

3

7

0

1

5

6

C

1

5

T

8

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

5

R

5

4

7

6

1

5

L

R

5

4

6

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

T

P

O

R

R

5

P

T

3

0

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

4

7

5

4

5

C

I

1

C

5

9

5

P

T

7

1

R

9

0

1

5

1

2

C

2

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

5

9

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

C

6

C

P

3

T

2

1

6

8

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

B

5

8

8

R

8

5

L

T

U

O

-

H

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

N

D

G

N

D

G

N

D

5

5

8

T

+

1

3

V

N

/

C

F

B

T

A

B

L

T

2

P

0

R

5

8

1

AMMETER
3mA dc range

A

+

-

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

18

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

SECTION 4: CIRCUIT ADJUSTMENTS

Electrical AdjustmenTs by Remote Commander

Use the Remote Commander (RM-Y194, RM-W151, 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

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

3. Press

4. Press

Category

Mode

service defl hsiz 16

Signal
Type

1

or 4 on the Remote Commander to select the item.

3

or 6 on the Remote Commander to change the data.

MUTING

ntsc

vchp 00000000 00000000

then

ENTER

Display

Item

to write into memory.

Item
Data

Service Adjustment Mode Memory

1. Press

Mode

Signal
Type

Category

Mode

service defl hsiz 16

Signal
Type

8

then

service defl hsiz 16

ntsc

vchp 00000000 00000000

ntsc

vchp 00000000 00000000

ENTER

Category

on the Remote Commander to initialize.

Display

Item

write

Display

Item
Data

Item

Item

Data

write

Carry out Step 1 when adjusting
IDs 0-6 and when replacing and
adjusting IC002

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 confi rm 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)

VOLUME (+)

(Service Mode)

RM-Y180

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

MUTING

then

ENTER

to write into memory.

2. Turn set off then on to exit Service Adjustment Mode.

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

19

4-4. SERVICE DATA LISTS

p

K

K

K

K

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Service

Group

VERSION Fix 0 VER

1HSIZ
2HPOS
3 VSIZ

5VLIN
6SCOR
7 VBOW
8 VANG

9TRAP
10 PAMP
11 UPIN
12 LPIN
13 TROT
14 HBL
15 RBL
16 LBL
17 VBL

19 HDW
20 AFC
21 AFC1
22 AFCW
23 CDMD
24 HSS
25 VSS
26 SLDN
27 SLUP
28 JPSW

30 EHT
31 EHTG

DEF

VAR
VAR
VAR
VAR 4 VPOS
VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR

FIX

FIX 18 HMSK

FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX 29 HOSC
FIX
FIX

DescriptionFix/ Var No. Name

rocessor version information

Micro
H-SIZE ( EW DC : YUV OFFSET )
H POSITION: YUV OFFSET
V RAMP SIZE: YUV OFFSET
V POSITION (RAMP DC) NOT USEFUL: YUV OFFSET
V LINEARITY
S CORRECTION
BOW
ANGLE
EW TRAPESIUM
PARABOLA ( EW PIN )
UPPER CORNER ( UPPER PIN )
LOWER CORNER ( LOWER PIN )
TROT
FBPBLK ( H BLK MODE SELECT )
HBLK R POS ( HBLK REAR TIMING: YUV OFFSET )
HBLK F POS ( HBLK FRONT TIMING: YUV OFFSET )
VBLK POS ( V BLK WIDTH )
Macro OFF ( TOP VEND [ WHEN MACROVISION ] PREVENT
OFF )
IIC_HOUT_DUTY ( H PULSE WIDTH [ 25u/19u ]
H AFC Gain ( AFC GAIN )
H Charge pump ( AFC1 TIME CONSTANT )
AFC1 PULLIN ( AFC1 PULL IN WIDE )
V CD MODE ( V DET WINDOW SW TIMING )
SYNC SLICE LVL(H) ( SYNC SLICE LEVEL [ H sepa ] )
SYNC SLICE LVL(L) ( SYNC SLICE LEVEL [ V sepa ] )
AUTO SLICE DOWN ( AUTO SLICE LEVEL DOWN )
AUTO SLICE UP ( AUTO SLICE LEVEL UP )
VJPSW ( JUMP SW )
H VCO FOR OFFSET ADJUST OFFSET
EHT
EHT GAIN ( EHT MODE )

NTSC

Init

Data

=
29
37
35
33
31
26
37
31
25

9
32
32

109

0
15
48

0

0

1

0

3

0

1

0

3

0

0

0

5

4

1

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

20

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Service

Group

16 : 9

Service

Group

VP1

Fix/ Var No.

VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR
VAR

Fix/ Var

VAR
VAR 2 GDRV
VAR 3 BDRV
VAR
VAR 5 GCUT
VAR 6 BCUT
VAR
VAR
VAR
VAR

FIX 11 RON
FIX 12 GON
FIX 13 BON

1 VSIZ
2 VPOS
3VLIN
4SCOR
5TRAP
6 PAMP
7UPIN
8LPIN

9 ABLG
10 SCON
11 VPW

Name Item name & ( Description )No.

1 RDRV

4 RCUT

7SCON

8 SHUE

9SCOL
10 SBRT

Item name & ( Description )Name

V RAMP SIZE
V POSITION ( RAMP DC )
V LINEARITY
S CORRECTION
EW TRAPESIUM
PARABOLA ( EW PIN )
UPPER CORNER ( UPPER PIN )
LOWER CORNER ( LOWER PIN )
ABL GAIN
SUB CONTRAST LEVEL
JUMP PULSE WIDTH

R DRIVE
G DRIVE: GDOF OFFSET ( only Color Temp. "Warm")
B DRIVE: BDOF OFFSET ( only Color Temp. "Warm")
HARDWARE AKB (R) CMP DATA
HARDWARE AKB (G) CMP DATA
HARDWARE AKB (B) CMP DATA
SUB CONTRAST LEVEL
SUB TINT (HUE)
SUB COLOR LEVEL
SUB BRIGHTNESS
R OUTPUT ON ( 0:R OUTPUT OFF 1:R OUTPUT ON )
G OUTPUT ON ( 0:R OUTPUT OFF 1:R OUTPUT ON )
B OUTPUT ON ( 0:R OUTPUT OFF 1:R OUTPUT ON )

NTSC

Init

Data

55
37
30
20
30

0
34
32
15
10

1

NTSC

Init Video YUV 16:09

Data

45 45 45
28 28 30 N/A
33 33 29 N/A

120

98 98 72 N/A

102 102 91 N/A

16 16 16

77 7
17 17
11 11

1

1

1

120 120 N/A

27 N/A
14 N/A

N/A

N/A
N/A

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

21

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Service

Group

VP1

Fix/ Var No.

FIX 14 BLLV

FIX

FIX
VAR 17 SSHO
VAR 18 SSHP
VAR 19 SHPF

FIX 20 SHCL

FIX

FIX

FIX

FIX

FIX

FIX

FIX

FIX 28 BKAT

FIX 29 BKRC

FIX 30 BKDP

FIX

15 MTRX
16 AXIS

21 SHMX
22 ACLV
23 AKBD
24 AKBS
25 REFP
26 YNRC
27 BKON

31 BKSP

Item name & ( Description )Name

BLUE STRETCH ( 00:NO<->11:DEEP ) only Color Temp "Cool"
MATRIX RATIO SELECT
R-Y PHASE SELECT
SUB SHARPNESS GAIN (OVER) RF/VIDEO
SUB SHARPNESS GAIN (PRE) RF/VIDEO
SHARPNESS FOR ( 00:2 CLK <-> 11:5 CLK )
SHARPNESS CORING LEVEL
SHARPNESS LIMITER LEVEL
ACL GAIN
AKB SELF DIAGNOSTIC COUNTER (@1 SEC)
AKB SWITCH ( 0:AKB OFF 1:H/W AKB ON )
AKB REFPLS TIMING
YNR LIMITER LEVEL
BLACK STRETCH ON
BLACK STRETCH DETECTOR TIME CONSTANT1
BLACK STRETCH DETECTOR TIME CONSTANT2
BLACK STRETCH DEPTH
BLKSTPNT BLACK STRETCH POINT

NTSC

Init Video YUV 16:09

Data

1

0
52
10 26 25 N/A
15 31 30 N/A

10 0N/A

0
15

0

2

1

0
15

1
15

4

soft cont'l

2

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

22

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Service

Group

VP2

Fix/ Var

FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX

FIX 12 YCMD

FIX 13 VACL
FIX
FIX 15 VAMX
FIX
FIX
FIX
FIX
FIX

FIX
VAR
VAR
VAR
VAR
VAR

FIX

No. Name Item name & ( Description )

1VMOF
2VMLO
3VMHI
4VMDL
5VMPL
6VMWD
7VMCL
8 VMMX

9CKLV
10 CKON
11 ALFA

14 VAGA

16 GAMM
17 YDLY
18 CDLY
19 YOFF
20 CBPF
21 BGPP
22 GDOF
23 BDOF
24 GCOF
25 BCOF
26 DCTV
27 DCTG

NTSC

Init Video YUV 16:09

Data

VM GAIN(Off) ( VM LEVEL AT "OFF" SETTING ) 2
VM GAIN(Low) ( VM LEVEL AT "LOW" SETTING )
VM GAIN(High) ( VM LEVEL AT "HIGH"SETTING )
VM DELAY ( VM DELAY )
VM POL ( VM POLARITY )
VM WIDTH ( VM WIDTH )
VM CORING LEVEL ( VM CORING LEVEL )
VM MAX ( VM LIMITER LEVEL )
KILLER LEVEL ( VM COLOR KILLER VTH )
FORCE KILLER ( FORCE KILLER )
ALFA ( ADAPTIVE DET SENSITIVITY )
MANEXP ( YC SEPA FORCE SELECT [ 00:ADAPTIVE 01:H 10:V
11:HV ] )
V APERTURE CORING LV ( V APERTURE CORING LEVEL )
V APERTURE GAIN ( V APERTURE GAIN LEVEL )
V APERTURE MAX GAIN (V APERTURE LIMITER LEVEL)
GAMMA ( GAMMA [ 00:NO <-> 11:DEEP ] )
Y DELAY ( Y DELAY TIME )
C DELAY ( C DELAY TIME )
Y Mute ( Y OUTPUT MUTE )
SAW FILTER(7.2MHzBPF) ( C BPF FOR HI )
BGP POS ( BGP [ FOR C DECODER ] TIMING )
G DRIVE OFFSET only Color Temp. "Warm"
B DRIVE OFFSET only Color Temp. "Warm"
G CUT CMP DATA OFFSET only Color Temp. "Warm"
B CUT CMP DATA OFFSET only Color Temp. "Warm"
DCTRAN VTH<6:0> ( DCTRANSFER VTH )
DCTRAN GAIN<4:0> ( DCTRANFER GAIN )

15

soft cont'l

soft cont'l

14
11
28
30

soft cont'l

4
8
6
0
0
0

1
0
2

0

0

5

1
0
0
0
9
9

10N/A

13N/A

928N/A

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

23

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

Service

Group

NR

Fix/ Var

VAR
VAR
VAR

FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX

No. Name Item name & ( Description )

1SCOL

2 SHCL

3SHMX

4 YNRC

5VMHI

6VMCL

7 VMMX

8 VAMX

9GAMM
10 YNRS
11 WSTH
12 WSVA
13 WSCA
14 NRCH
15 NRCL
16 NRVL
17 NRVH
18 IPNC
19 IPNV

SUB COLOR LEVEL 17
SHARPNESS CORING LEVEL
SHARPNESS LIMITER LEVEL
YNR LIMITER LEVEL
VM LEVEL AT " HIGH " SETTING
VM CORING LEVEL
VM LIMITER LEVEL
V APERTURE LIMITER LEVEL
GAMMA ( 00: NO < - > 11:DEEP)
YNR ON
WEAK SIGNAL VTH
WEAK SIGNAL VIDEO ATT
WEAK SIGNAL CHROMA ATT
THRNZV1( NOISE DET TIME CONSTANT )
THRNZV2 ( NOISE DET TIME CONSTANT )
THRNZH1 ( NOISE DET VTH )
THRNZH2 ( NOISE DET VTH )
DETNZ STATUS COUNTER
DETECTION PERIOD

NTSC

Init

Data

15

7
7

10

0
7
0
0
1
7
0
5
0

16

2
0
2

10

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

24

(

)

(

)

(

)

(

y

]

(

)

(

)

(

)

(

)

(

])

Service

Group

PALLET

Fix/ Var No.

FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX

Name Item name & ( Description )

1 VPIC

2 VBRI

3VCOL

4 VHUE

5 VSHA

6 VVM

7VTRI

8 VAPA

9VGMA
10 VDCT

FIX 11 VBKP
FIX 12 TBKD

PICTURE
BRIGHTNESS
COLOR
HUE
SHARPNESS
VM
COLOR TEMP
APERTURE G
GAMMA
DCT LV
BLACK STRETCH DEPTH ( VIDEO )
BLACK STRETCH DEPTH ( TUNER )

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

NTSC

BA6 DATA (DEC)

PALLET

= VIVID

PALLET

= STD

PALLET

= MOVIE

PALLET

= PRO

63 50 37 31
27 30 31 31
37 32 31 31
31 31 31 31
31 32 31 21

21 00
01 21
55 30
31 00

23 15 2 2

33 47
33 47

Service

Group

Y

Fix/ Var

No.

Name Item name & ( Description )

FIX 1 YNRS
FIX 2 YTHR
FIX 3 Y2D
FIX 4 2DFX

FIX 5 CLPS

FIX 6 VLPF
FIX 7 CLPF
FIX 8 BPFB
FIX 9 BPFF
FIX 10 BKTS

FIX 11

VMG

FIX 12 CLPT

YNR SW
Y THR 2D
Y2D Fix
C BPF Fix

YNR ON

Y SIGNAL THROUGH 2DYCS

Y SIGNAL GENERATE from 2DYCS

C SIGNAL GENERATE from H/V BPF onl
CLAMP CONTROL SW ( 0: CLAMP OFF. 1:
CLAMP AUTO. 2: CLAMP ON
VIDEO LPF
CHROMA LPF
YCS HBPF BACK
YCS HBPF FRONT
BS T2 IFON
VMGAIN2 ( MODULATOR FEEDBACK GAIN CONTROL

2

Y_LPF [ ANALOG ] for adjust

C_LPF [ ANALOG ] for adjust

YCS HBPF SELECT [ BACK ]

YCS HBPF SELECT [ FRONT ]

BLACK STRETCH RECOVER TIME OUT

CLAMP KEEP TIMER ( CLAMP AUTO ON KEEP TIMER COUNT [
@ 100 MS

NTSC

Init

Data

0
0
0
1

1

3
3
1
1
0

2

15

KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120

25