Sony KV-25FS120, KV-24FS120, KV-21FM120, KV-21FA310, KV-21FS120 User 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 with Page 17, Replaced Page 37 with Page 37 Removed critical mark on SPACER, DY Replaced Page 52 with Page 52, Page 54 with Page 54, and Page 56 with Page 56 Corrected screw placement for Speaker Assy Replaced Page 56 with Page 56 Added Remote Control Battery Cover PNs for RM-Y194 and RM-W151 Replaced Page 80 with Page 80.

9-965-959-02

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

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

9-965-959-02

TRINITRON® COLOR TELEVISION

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

SECTION TITLE PAGE

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.

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

)

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

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

Audio

2222 0000 1011 4244 0000

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

hones

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

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

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 Video Y,P

Audio Out

Subwoofer

Head

Video

, P

Audio

hones

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)

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

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

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)

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

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

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

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

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

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

ENTER

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

IK-AKBIN

A BOARD

IC545

V. OUT

REF

A BOARD

IC001

SYSTEM

IO-BDAT

I-Prot

A BOARD

IC002

MEMORY

BDA

FROM

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

DISPLAY

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

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

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

Lift to remove Sub-woofer.

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

1-3. CHASSIS ASSEMBLY REMOVAL

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

Claw

1-4. SERVICE POSITION

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

Press on catch tab to release A Board. Disconnect remaining cables to allow A Board to be removed.

Chassis Assembly

A Board

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

CV Board

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

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

assembly, degaussing coils and CRT grounding strap.

3. Remove the CV Board from the CRT.

4. Remove the chassis assembly.

5. Loosen the neck assembly ﬁ xing screw and remove.

6. Loosen the deﬂ ection yoke ﬁ xing screw and remove.

7. Place the set with the CRT face down on a cushion and remove the degaussing coil holders.

8. Remove the degaussing coils.

9. Remove the CRT grounding strap and spring tension devices.

10. Unscrew the four CRT ﬁ xing screws [located on each CRT corner] and remove the CRT [Take care not to handle the CRT by the neck].

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

Anode Button

Turn up one side of the rubber cap in the direction indicated by arrow

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

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

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

corrects these areas.

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

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:

B G

G R

RGB

BGR

BMC magnet

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

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:

R G B

BGR

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

R G B

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:

a-d: screen-corner

misconvergence

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

2-4. SCREEN (G2)

1. Input a dot pattern.

2. Set the PICTURE and BRIGHTNESS controls at minimum and COLOR control at normal.

3. Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as shown below so that voltages on the red, green, and blue cathodes are 160 ± 2VDC.

160 – 2VDC

Pedestal

Ground

4. Observe the screen and adjust SCREEN (G2) VR in FBT to obtain the faintly visible background of dot signal.

2-5. METHOD OF SETTING THE SERVICE

ADJUSTMENT MODE

Service Mode Procedure

1. Standby mode (power off).

2. Press

Display

Channel 5 Sound Volume

on the Remote Commander (press each button within a second).

Power

2-6. WHITE BALANCE ADJUSTMENTS

1. Input an entire white signal with burst.

2. Set to Service Adjustment Mode.

3. Set the PICTURE and BRIGHTNESS to minimum.

4. Adjust with SBRT if necessary.

ENTER

and 4 .

and 4.

to save into the memory.

5. Select GCUT and BCUT with

6. Adjust with

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

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

or 4 on the Remote Commander to select the time.

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

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

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

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

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.

on the

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

(

)

FIGURE 1

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

DIGITAL MULTIMETER

R565

POWER SUPPLY

1SS119

C566

TP23

AMMETER 3mA dc range

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

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

or 4 on the Remote Commander to select the item.

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

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

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)

Disp. (Item up)

(Device Item Up)

Disp. (Item down)

(Initialize)

VOLUME (+)

(Service Mode)

RM-Y180

POWER

(Service Mode)

DISPLAY

(Service Mode)

Item (Data up)

Item (Data down)

(Device item down)

ENTER

(Enter into memory)

(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

4-4. SERVICE DATA LISTS

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

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

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

120 120 N/A

27 N/A 14 N/A

N/A

N/A N/A

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 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

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

10 0N/A

0 15

1 15

soft cont'l

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 )

soft cont'l

14 11 28 30

soft cont'l

4 8 6 0 0 0

1 0 2

1 0 0 0 9 9

10N/A

13N/A

928N/A

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

Service

Group

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

7 7

0 7 0 0 1 7 0 5 0

2 0 2

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

(

)

(

)

(

)

(

]

(

)

(

)

(

)

(

)

(

])

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 0 0 01 2 1 55 3 0 31 0 0

23 15 2 2

33 4 7 33 4 7

Service

Group

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

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

3 3 1 1 0

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

(

)

Service

Group

Fix/ Var

FIX 1 FIX 2 FIX 3 FIX 4 AASL FIX 5 FIX 6 FIX 7 FIX 8 FIX 9 FIX 10 FIX 11 FIX 12 FIX 13 FIX 14 FIX 15

Name Item name & ( Description )No.

A1ON ACCS

A2ON A3ON

AXTH

ACTH

AVAV B2TH

ACCP

A1FL

BASL XFFR

A2FL A3FL

AMP OFF1 L ( ANALOG ACC hysteresis ) AMP ON ( ANALOG ACC AMP ON LEVEL) ACC SW ( ACC ON/OFF ) AVE SEL B2AVE SEL ( ACC TIME CONSTANT ) FREE RUN ( VCXO FORCE FREERUN ) AMP2 ON Thresh ( ABL VTH ) AMP3 ON Thresh ( ACL VTH ) AMP2 OFF Thresh L ( AMP2 OFF LEVEL LOWER ) AMP3 OFF Thresh L ( AMP3 OFF LEVEL LOWER ) AXIS HYS ( AXS HYS ) ROM HYS ( ROM HYS ) AVE SEL AV (AVE SEL AV ) B2COMP ( B2COMP ) ACC COMP ( ACC COMP )

C DECODER TIME CONSTANT [32, 16, 8, 1H ]

Init Video YUV 16:09

Data

4 0 2 0 0 4

4 64 64 30 10

01N/A

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

(

)

Service

Group

RGB

Fix/ Var No. Name Item name & ( Description )

FIX FIX FIX FIX

FIX 5 COGL

FIX 6 COGH

FIX 7 COBL

FIX 8 COBH

FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX 20 UOFS FIX FIX FIX FIX FIX

1AMUT 2PMUT 3CORL 4CORH

9 ABLS 10 ALSP 11 ALRS 12 ALAS 13 ABLG 14 ALS2 15 AKBM 16 AKBP 17 OSDL 18 UVIN 19 UVG

21 VOFS 22 AALG 23 AALS 24 UVDE 25 UVDT

RGB POWER ON MUTE ( RGB POWER ON MUTE ) RGB Mute before OSD ( RGB MUTE [ EXCEPT OSD ] CUTOFF R L ( R CUTOFF LOWER ) CUTOFF R H ( R CUTOFF UPPER ) CUTOFF G L ( G CUTOFF LOWER WHEN TEMP IS "COOL" AND "NEUTRAL" CUTOFF G H ( G CUTOFF LOWER WHEN TEMP IS "COOL" AND "NEUTRAL" CUTOFF B L ( B CUT OFF LOWER WHEN TEMP IS "COOL" AND "NEUTRAL" CUTOFF B H ( B CUT OFF LOWER WHEN TEMP IS "COOL" AND "NEUTRAL" ABL SEL ( ABL SELECT ) ACL SPEED ( ACL SPEED ) ACL SPE ( ACL RECOVER SPEED ) ACL ASPE ( ACL ATACK SPEED ) ABL GAIN ( ABL GAIN ) ACLASPE2 ( ACL ATACK SPEED [ 2 ] ) AKB MODE ( AKB MODE ) AKB P[5:0] ( AKB PULSE HEIGHT ) OSD LIMIT ( OSD LIMMIT SELECT ) Y/U/V UVINV ( U/V INVERT ) U/V GAIN ( U/V OFFSET CANCELER ON ) U IN OFFSET V IN OFFSET ( V IN OFFSET ) ANA ACL GAIN ( ANALOG ACL GAIN CONTROL ) ANA ACL ON ( ANALOG ACL ON/OFF CONTROL) UV_DITHER_EN ( UVIN DITHER ENABLE ) UV_DITHER_TEST ( UVIN DITHER TEST )

U IN OFF SET

NTSC

Init Video YUV 16:09

Data

0 1

212

197

176

0 0 2 9 5 2 0

0 0 0 7

0 1 0 0

01N/A 06N/A

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

Service

Group

DEFD

NTSC

No.

FIX FIX FIX

FIX 4 EWCL V/EW DAC CLK CONTROL ( EW/VRAMP DA CLOCK SELECT ) 0 0 0 N/A

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

Name Item name & ( Description )Fix/ Var

1 HFFR

2HFUP

3JSWW

5XF0A

6BGST

7 XPHA

8 HRMP

9RPLU 10 RPLB 11 XF0B 12 RPLS 13 SSM 14 VSAG 15 AFC2 16 VRFL 17 SSLP 18 XPLU 19 8FSC 20 4FS2 21 CDM2 22 BGPC 23 MHDL 24 BFRE

AFC FREE RUN ( AFC1 FORCE FREE RUN ) HFREE UP ( H FREE RUN FREQUENCY UP [ 700 Hz ] VJP WIDTH ( JUMP PULSE WIDTH )

FREE RUN OFFSET ( VCXO FREE RUN ADJUST) BG START ( BGP [ FOR PLL ] TIMING ) VCXO CTL ( VXCO PHASE ADJUST ) Ramp Slew Rate ( AFC2 TIME CONSTANT ) Ref Charge pump ( REF PLL TIME CONSTANT ) Ref VCO ( REF PLL TIME CONSTANT ) VCXO FREE RUN ( VXCO Fo ADJUST ) REF FB SW ( REF VCO FB LOOP SELECT ) Sync Sepa Mask ( SyncSepaMasking CONTROL ) V-sag ( V-SAG prevent ON ) AFC2 Gain ( AFC2 GAIN CONTROL ) V RAMP FIL OFF ( V RAMP FILTER SWITCHING OFF ) LPY SYNC ( LFP pre SYNC SEPA ON/OFF B PLL Change pump ( ACP TIME CONSTANT ) 8FSC SEL ( 8fsCLK Skew OFF ) 4FSC SEL2 ( 4fsCLK Skew OFF ) V_CD_MODE2 ( V_LOGIC SW ) Add. FTN BGP C ( BGP C ) Add. FTN BGP SEL ( BBP SEL ) V FREE ( FORCE V FREE RUN )

Init Video YUV 16:09

Data

0 0 0

0 16 10

16 1 N/A

10N/A 10N/A

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

Service

Group

DEFD

Fix/ Var No. Name Item name & ( Description )

FIX 25 HRPP AFC2 RAMP POS ( FRAMP RRAMP H OUT CONTROL RANGE 8

FIX FIX FIX

FIX 29 DTH

FIX

FIX 31 VSSW

FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX

26 DSC 27 VBH 28 VPW

30 SLON

32 AF2S 33 VSL2 34 VSL1 35 VYUV 36 VYVP 37 VYHS 38 VYHP 39 VSHE 40 VYRB 41 VYLB

CLOCK SEL ( DS DAC CLK SW 2 ) VBLK HALFKIL ( V BLK HALF KILL ) V PLS WIDTH ( V Pulse Wide ) D THRESHOLD LEVEL ( DITHER THRESHOLD LEVEL CONTROL AT IIC AUTOD= ON LPF SYNC ON ( LPF SYNC ON )

SYNC SLICE LVL(V)_W ( SYNC SLICE LEVEL [ V ] Wide Window AFC2_SEL ( ADC2 TIMING SW ) V_SYNC_LPF_2 ( DIGITAL V_SINC_LPF [ Fall ] ) V_SYNC_LPF_1 ( DIGITAL V_SINC_LPF [ Rise ] ) YUV VSIZE OFFSET ( YUV V-SIZE OFFSET ) YUV VPOS OFFSET ( YUV V-POSITION OFFSET ) YUV HSIZE OFFSET ( YUV H-SIZE OFFSET ) YUV HPOS OFFSET ( YUV H-POSITION OFFSET) V-SHRINK MODE ( V-SHRINK MODE for AV ) YUV RBLK ( YUV RBLK OFFSET ) YUV LBLK ( YUV LBLK OFFSET )

NTSC

Init Video YUV 16:09

Data

110

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

Service

Group

OTHEROSD

Service

Group

Fix/ Var No.

FIX 1 PCLP

FIX 2 VRT

FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX

No. Item name & ( Description )Fix/ Var

FIX 1 FIX 2 FIX FIX FIX

Name

3 14HI 4 14HD 5DSI 6DSD 7 ADCD 84FSC

9WSTH 10 WSVA 11 WSCA 12 VREF

Name

OSLR 3OSLG 4OSDC 5OSLB

Item name & ( Description )

pedestal CLAMP ON/OFF ( SYNC TIP/PEDESTAL CLAMP SELECT ) VRT Voltage ( ADC REFERENCE [ 00:1.15Vpp 01:1.25 Vpp 10:1.35 Vpp 11:1.45 Vpp ] ) INV 14H CLK ( 4fsc [ Skew ] CLK POLARITY ) 14H CLK DLY ( 4fscCLK [ Skew ] CLK DELAY ADJUST ) INV DS CLK ( 8fscCLK POLARITY ) DS CLK DLY ( 8fscCLK DELAY ADJUST ) AD CLK DLY ( ADC CLK DELAY ADJUSTO ) 4FSC SW ( AD/LOGIC CLK SWAP ) WEAK_SIG_VTH ( WEAK_SIGNAL VTH ) WEAK SIG VIDEO ATT ( WEAK SIGNAL VIDEO ATT ) WEAK SIG CHROMA ATT (WEAK SIGNAL CHROMA ATT) VREF_SEL ( AD REFERENCE SELECT [ VZ ] )

HT ( HALF TONE LEVEL ) OSD LVL R ( R OSD LEVEL ) OSD LVL G ( G OSD LEVEL ) OSD COMP ( OSD COMP ) OSD LVL B ( B OSD LEVEL )

NTSC

Init Video YUV 16:09

Data

0 0 0 0 0 0 0 0 0 0

NTSC

Init

Data

0 25 25

0 25

00N/A 00N/A 00N/A 00N/A 01N/A

00N/A 00N/A

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

+ 85 hidden pages

Sony KV-25FS120, KV-24FS120, KV-21FM120, KV-21FA310, KV-21FS120 User Manual

TABLE OF CONTENTS

SPECIFICATIONS

WARNINGS AND CAUTIONS

SAFETY CHECK-OUT

SELF-DIAGNOSTIC FUNCTION

SECTION 1: DISASSEMBLY

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

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

1-3. CHASSIS ASSEMBLY REMOVAL

1-4. SERVICE POSITION

1-5. PICTURE TUBE REMOVAL

ANODE CAP REMOVAL PROCEDURE

SECTION 2: SET-UP ADJUSTMENTS

2-1. BEAM LANDING

2-2. CONVERGENCE

2-3. FOCUS

2-4. SCREEN (G2)

2-6. WHITE BALANCE ADJUSTMENTS

SECTION 3: SAFETY RELATED ADJUSTMENTS

SECTION 4: CIRCUIT ADJUSTMENTS

4-4. SERVICE DATA LISTS