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HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
SERVICE MANUAL
MODEL NAME REMOTE COMMANDER DESTINATION
BA-6
CHASSIS NO.
CHASSIS
KV-20FS120 KV-20FS120 KV-21FM120 KV-21FS120 KV-21FS120 KV-21FA310 KV-21FA310 KV-24FS120 KV-24FS120 KV-25FS120 KV-25FS120
RM-Y194 RM-Y194 RM-W151 RM-Y194 RM-Y194 RM-Y180 RM-Y180 RM-Y194 RM-Y194 RM-Y194 RM-Y194
US CND LATIN NORTH LATIN NORTH LATIN SOUTH LATIN NORTH LATIN SOUTH US CND LATIN NORTH LATIN SOUTH
SCC- S61K-A SCC- S59H-A SCC- S60X-A SCC- S60Y-A SCC- S73A-A SCC- S60T-A SCC- S60U-A SCC- S61L-A SCC- S59J-A SCC- S73B-A SCC- S73C-A
ORIGINAL MANUAL ISSUE DATE: 3/2004
:UPDATED ITEM
REVISION DATE 3/2004 4/2004
SUBJECT No revisions or updates are applicable at this time. 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. Corrected Remote Control Battery Cover PN for RM-Y194 Replaced Page 80 with Page 80.
3/2005
TRINITRON® COLOR TELEVISION
9-965-959-03
Self Diagnosis
Supported model
SERVICE MANUAL
MODEL NAME REMOTE COMMANDER DESTINATION
BA-6
CHASSIS NO.
CHASSIS
KV-20FS120 KV-20FS120 KV-21FM120 KV-21FS120 KV-21FS120 KV-21FA310 KV-21FA310 KV-24FS120 KV-24FS120 KV-25FS120 KV-25FS120
RM-Y194 RM-Y194 RM-W151 RM-Y194 RM-Y194 RM-Y180 RM-Y180 RM-Y194 RM-Y194 RM-Y194 RM-Y194
US CND LATIN NORTH LATIN NORTH LATIN SOUTH LATIN NORTH LATIN SOUTH US CND LATIN NORTH LATIN SOUTH
SCC- S61K-A SCC- S59H-A SCC- S60X-A SCC- S60Y-A SCC- S73A-A SCC- S60T-A SCC- S60U-A SCC- S61L-A SCC- S59J-A SCC- S73B-A SCC- S73C-A
KV-24FS120
KV-21FA310
TRINITRON® COLOR TELEVISION
9-965-959-03
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
TABLE OF CONTENTS
SECTION TITLE PAGE
Specifications ............................................................................................................................................................................. 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 Confirmation Method (HV Hold-Down Confirmation) and Readjustments ........................................................ 17 3-2. B+ Voltage Confirmation and Adjustment ........................................................................................................................ 17 SECTION 4: CIRCUIT ADJUSTMENTS.......................................................................................................................................... 19 4-1. Setting the Service Adjustment Mode .............................................................................................................................. 19 4-2. Memory Write Confirmation 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
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KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
SPECIFICATIONS
KV-20FS120 Power Requirements Number of Inputs/Outputs Video 1) S Video 2) Y,PB, PR 3) Audio 4) Audio Out 5) Speaker Output (W) Headphones Power Consumption (W) In Use (Max) In Standby (Max) 6) Dimensions (W x H x D) mm in Mass kg lbs 120V, 60Hz 2 0 1 4 0 10W x 2 1 140W 1W 631 x 468 x 490.5 mm 24 7/8 x 18 3/8 x 19 1/4 in 25.2 kg 55 lbs 9 oz KV-21FA310 (N) Power Requirements Number of Inputs/Outputs Video 1) S Video 2) Y,PB, PR 3) Audio 4) Audio Out 5) Speaker Output (W) Subwoofer Headphones Power Consumption (W) In Use (Max) In Standby (Max) 6) Dimensions (W x H x D) mm in Mass kg lbs 120V, 60Hz 2 1 1 4 1 5W x 3 15W 1 155W 1W 609 x 540 x 503 mm 24 x 21 1/4 x 19 3/4 in 28.6 kg 63 lbs
KV-21FM120 120V, 60Hz 2 0 0 2 0 5W x 2 1 125W 1W 631 x 468 x 490.5 mm 24 7/8 x 18 3/8 x 19 1/4 in 25.2 kg 55 lbs 9 oz KV-21FA310 (S) 220V, 50/60Hz 2 1 1 4 1 5W x 3 15W 1 150W 1W 609 x 540 x 503 mm 24 x 21 1/4 x 19 3/4 in 28.6 kg 63 lbs
KV-21FS120 (N) 120V, 60Hz 2 0 1 4 0 10W x 2 1 140W 1W 631 x 468 x 490.5 mm 24 7/8 x 18 3/8 x 19 1/4 in 25.2 kg 55 lbs 9 oz KV-24FS120 KV-25FS10 (N) 120V, 60Hz 2 1 1 4 1 10W x 2 NA 1 165W 1W 718 x 526.5 x 480 mm 28 1/4 x 20 3/4 x 18 7/8 in 32.8 kg 72 lbs 5 oz
KV-21FS120 (S) 220V, 50/60Hz 2 0 1 4 0 10W x 2 1 135W 1W 631 x 468 x 490.5 mm 24 7/8 x 18 3/8 x 19 1/4 in 25.2 kg 55 lbs 9 oz KV-25FS120 (S) 220V, 50/60Hz 2 1 1 4 1 10W x 2 NA 1 160W 1W 718 x 526.5 x 480 mm 28 1/4 x 20 3/4 x 18 7/8 in 32.8 kg 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 (fix); Impedance (output): 2 kilohms 6) This specification is maximum wattage.
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
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KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Television system
American TV standard, NTSC
Antenna
75 ohm external terminal for VHF/UHF
Channel coverage
VHF: 2-13/ UHF: 14-69/ CATV: 1-125
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)
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)
TruSurround
by
TM
SRS
®
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.
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 specifications are subject to change without notice.
© 2004 Dolby Laboratories, Inc. Dolby, Pro Logic, and the double-D symbol are registered trademarks of Dolby Laboratories.
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
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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 identified 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 identified 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.
Afin 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 ŕ l'alimentation du secteur.
! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identifies 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 identifies 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
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KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
SAFETY CHECK-OUT
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 specified values. Make sure your instruments are accurate; be suspicious of your HV meter if sets always have low HV. 8. Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. Leakage Test The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instructions. 2. A battery-operated AC milliampmeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate low voltage scale. The Simpson's 250 and Sanwa SH-63TRD are examples of passive VOMs that are suitable. Nearly all battery-operated digital multimeters that have a 2 VAC range are suitable (see Figure A).
How to Find a Good Earth Ground A cold-water pipe is a guaranteed earth ground; the cover-plate retaining screw on most AC outlet boxes is also at earth ground. If the retaining screw is to be used as your earth ground, verify that it is at ground by measuring the resistance between it and a cold-water pipe with an ohmmeter. The reading should be zero ohms. If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble- light (not a neon lamp) between the hot side of the receptacle and the retaining screw. Try both slots, if necessary, to locate the hot side on the line; the lamp should light at normal brilliance if the screw is at ground potential (see Figure B).
To Exposed Metal Parts on Set
Trouble Light AC Outlet Box Ohmmeter Cold-water Pipe
0.15 F
1.5 K
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
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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 flash. The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED flash 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 flash 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 first 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
No. of times Self-Diagnositc Probable Cause Location STANDBY/ TIMER Display/ lamp flashes Diagnostic Result Does not light · Power cord is not plugged in. · Fuse is burned out (F601). (A Board) 2:0 or 2:1
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.
+B overcurrent (OCP)*
2 times
· 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) · +13V is not supplied. (A Board) · IC545 is faulty. (A Board)
I-Prot
4 times
4:0 or 4:1
· Has entered standby state after horizontal raster. · Vertical deflection pulse is stopped. · Power line is shorted or power supply is stopped.
IK (AKB)
5 times
5:0 or 5:1
· Video OUT (IC545) is faulty. · No raster is generated. (A Board) · CRT Cathode current detection reference pulse · IC001 is faulty. (A Board) output is small. · Screen (G2) is improperly adjusted.**
*If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously. The symptom that is diagnosed first 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 flash 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 flashing.
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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 confirmed, it is possible to bring up past occurrences of failure on the screen for confirmation. To Bring Up Screen Test In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below: Display Channel 5 Sound Volume Power ON Note that this differs from entering the Service Mode (Sound Volume + ). Self-Diagnostic Screen Display SELF DIAGNOSTIC 2: +B OCP 0 3: +B OVP N/A 4: VSTOP 0 5: AKB 1 101: WDT N/A
Numeral "0" means that no fault was detected. Numeral "1" means a fault was detected one time only.
Handling of Self-Diagnostic Screen Display Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you have completed the repairs, clear the result display to "0". Unless the result display is cleared to "0", the self-diagnostic function will not be able to detect subsequent faults after completion of the repairs. Clearing the Result Display To clear the result display to "0", press buttons on the Remote Commander sequentially when the diagnostic screen is displayed, as shown below: Channel 8 ENTER
Quitting the Self-Diagnostic Screen To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit. Self-Diagnostic Circuit
A BOARD IC001 Y/CHROMA JUNGLE FROM CV BOARD IC1751 PIN 5 FROM A BOARD IC561 PIN 7 51 IK-AKBIN
A BOARD IC545 V. OUT
A BOARD IC001 SYSTEM IO-BDAT 53
A BOARD IC002 MEMORY 5 BDA
REF 3
78 I-Prot
72 I-HLDWN
O-LED 79 DISPLAY
+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 deflection pulse is detected by pin 78 of IC001 (A Board). Power supply will shut down when waveform interval exceeds 2 seconds. IK (AKB) If the RGB levels* do not balance within 2 seconds after the power is turned on, this error will be detected by IC001 (A Board). TV will stay on, but there will be no picture. *(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).
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KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
SECTION 1: DISASSEMBLY 1-1. REAR COVER REMOVAL (ALL EXCEPT KV-21FA310)
Rear Cover
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)
7 Screws +BVTP 4X16 (KV-20FS120/21FM120/21FS120 Only) 6 Screws +BVTP 4X16 (KV-24FS120/25FS120 Only)
1-2. REAR COVER REMOVAL (KV-21FA310 ONLY)
Sub Woofer
1 Lift to remove Sub-woofer. 2 Remove screws.
Rear Cover
4 screw +BVTP 3 x 10
7 Screws +BVTP 4X16
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
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KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
1-3. CHASSIS ASSEMBLY REMOVAL
Claw
Chassis Assembly
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. 3 Disconnect remaining cables to allow A Board to be removed.
A Board
CV Board
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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
10
Coated Earth Ground Strap
8
7
9
3
6
2
5
4
1. Discharge the anode of the CRT and remove the anode cap. 2. Unplug all interconnecting leads from the deflection 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 fixing screw and remove. 6. Loosen the deflection yoke fixing 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 fixing screws [located on each CRT corner] and remove the CRT [Take care not to handle the CRT by the neck].
ANODE CAP REMOVAL PROCEDURE
WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and coated earth ground strap of CRT. NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon painted on the CRT.
REMOVAL PROCEDURES
c
b
a
Anode Button
Turn up one side of the rubber cap in the direction indicated by arrow a .
Use your thumb to pull the rubber cap firmly in the direction indicated by arrow b .
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 fitting 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.
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 .
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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
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
2-1. BEAM LANDING
Before beginning adjustment procedure: 1. Degauss the entire screen. 2. Feed in the white pattern signal.
6. Switch over the raster signal to red and blue and confirm the condition. 7. When the position of the deflection yoke is determined, tighten it with the deflection yoke mounting screw. 8. If landing at the corner is not right, adjust by using the disk magnets.
Adjustment Procedure
1. Input a raster signal with the pattern generator. 2. Loosen the deflection yoke mounting screw, and set the purity control to the center as shown below: Purity Control
Purity control corrects this area.
3. Turn the raster signal of the pattern generator to green. 4. Move the deflection yoke backward, and adjust with the purity control so that green is in the center and red and blue are even on both sides.
Disk magnets or rotatable disk magnets correct these areas (a-d).
a c
b d
Deflection yoke positioning corrects these areas. b
Blue Red Green
d a c
5. Move the deflection yoke forward, and adjust so that the entire screen becomes green.
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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.
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 insufficient H.Static convergence. 2. Rotate BMC magnet (b) to correct insufficient V.Static convergence. 3. After adjusting the BMC magnet, repeat Beam Landing Adjustment.
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
R G B
V.STAT
RG B
RV1750 V.STAT PURITY
BMC MAGNET
V.STAT magnet
b
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 b a B G R 2 a R a GB b B GR b B G R
BMC magnet a
b
3 b a R b
a B G B G
b
R
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KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Dynamic Convergence Adjustment
Before performing this adjustment, perform Horizontal and Vertical Static Convergence Adjustment. 1. Slightly loosen deflection yoke screw. 2. Remove deflection yoke spacers. 3. Move the deflection yoke for best convergence as shown below:
BR R B TLH+ (R)(B) (B)(R) TLH4. 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.
R B G B R R G B B G R
G
R B G
G
B R
Screen-Corner Convergence
B G R R G B
1. Affix a permalloy assembly corresponding to the misconverged areas:
b
a
a
B R G R B G G B R G R B
b
a-d: screen-corner misconvergence c d c d
4. Tighten the deflection yoke screw. 5. Install the deflection yoke spacers.
2-3. FOCUS
1. Adjust FOCUS control for best pictures.
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 deflection yoke.
RV1750 TLH Plate V.STAT
Focus (FV) Screen (G2)
CV Board
XCV YCH (TLV) (YHC, TLV) 20"/21" Models (TLV, XCV, YCH, TLV) 24"/25" Models
TLV
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.
2-6. WHITE BALANCE ADJUSTMENTS
1. Input an entire white signal with burst. 2. Set to Service Adjustment Mode. 3. Set the PICTURE and BRIGHTNESS to minimum. 4. Adjust with SBRT if necessary. 5. Select GCUT and BCUT with 1 and 4 . 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 1 and 4 . 9. Adjust with 3 and 6 for the best white balance. 10. Press MUTING then ENTER to save into the memory.
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 + Power on the Remote Commander (press each button within a second).
Service Adjustment Mode On
1. The CRT displays the time being adjusted.
Mode Category Display Item Display Item
service Signal Type ntsc
defl
hsiz
16
vchp
00000000
00000000
2. Press 1 or 4 on the Remote Commander to select the time. 3. Press 3 or 6 on the Remote Commander to change the data. 4. Press MUTING then ENTER to save into the memory.
Service Adjustment Mode Memory
Turn the set off then on to exit Service Adjustment Mode.
Mode Category service Signal Type ntsc vchp 00000000 defl Display Item Item Data hsiz 16 write 00000000 ENTER Red MUTING Green
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
16
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
SECTION 3: SAFETY RELATED ADJUSTMENTS Hold-Down Readjustment 3-1. X R565 CONFIRMATION METHOD (HV HOLD-DOWN CONFIRMATION) AND READJUSTMENTS
The following adjustments should always be performed when replacing the following components which are marked with Y on the schematic diagram: Part Replaced (Y) 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 Adjustment (X) HV HOLD-DOWN R565 If the setting indicated in Step 2 of Hold-Down Operation Confirmation cannot be met, readjustment should be performed by altering the resistance value of R565 component marked with X.
T585 FBT
Ammeter 3.0 mA DC range ABL + A IABL -
Preparation Before Confirmation
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. Confirm 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.
3-2. B+ VOLTAGE CONFIRMATION AND ADJUSTMENT
Note: The following adjustments should always be performed when replacing the following components, which are marked with Y on the schematic diagram on the A Board: A BOARD: Y IC600, PH602
Hold-Down Operation Confirmation
1. Connect the current meter between Pin 11 of the FBT (T585) and the PWB land where Pin 11 would normally attach (See Figure 1 on the next page). 2. Input a dot signal and set PICTURE and BRIGHTNESS to minimum: IABL = 100 ± 100µA. 3. Confirm 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.
Using a Variac, apply AC input voltage: 130 + 2.0 / - 0.0 VAC. Input a DOT pattern at Q.C. Set the PICTURE and the BRIGHTNESS controls to minimum. Confirm the voltage of A Board between TP-23 & Ground is =135.6 ± 1VDC. 5. If step 4 is not satisfied, replace the components listed above, then repeat steps 1 through 3.
1. 2. 3. 4.
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
17
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
FIGURE 1
DIGITAL MULTIMETER POWER SUPPLY
+ -
+ 1SS119
X R565
C566
( PS401
) R3 54 R3 53 C4 50 R3 57 R0 48 R1 41 H.PROT TP30 R6 56 R5 57 D566
Q0 42 C1 22
R1 51 R3 47 R609 J1 R2 L7 30 IC565 C3 50 C651 L7 31 C511 R3 52 L525
R2 58 TP33
HS522 Q522
R2 59 C6 52 C6 51
D2 58 Q2 51
C2 59
R575
D526
B C525
E R4 56 D545 C4 54 IC561 C7 51
C5 41 C512 L511 C2 58 T511
R1 50
6 C526 C2 57 C4 55 R4 58
2
C9 57
D6 58 D6 57 R7 50 R2 56 R7 54
R6 58
1 R4 50 R4 57 R0 92 7 R4 59 D006 C4 57 V.O UT IC545
TP16
D6 59 R6 59
C625
D6 52 R1 55 C513 R8 59 L513 C0 52 C514 TP25 B R0 52 L1 55
R4 51
TP17
C9 55
D3 60
L516 C4 58 R0 91 R8 53 J55 R0 C582 L582
1
TP24
E R9 53
D598 R0 54 C0 54 R512 R588 6 TP19 GN D HE ATE R - 13 V G ND GN D R514 R9 58
5 3 R 0
C505
0 C9 50
5 1 R 9
B Q590
1
3
R9 54 TP31 C624
2 00V
E H DT 6 4 R0 56 T505
L588 VD Y+ TP21
N/C
GN D
+ 13V 135V
T585 FBT
D0 61
VD YR505 TP27 N /C
602 TP23
H-OUT Q505 E
B
- U H O T 5 6 Q 0
HD YTP28 HD YH-O UT ABL TP20
TP22 C506 C1 60
C1 50
C
HDY +
C618
D506 R8 51 C4 60 D624 TP29
62 0 64 0
HDY +
CN515
TP23 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
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 confirm they were adjusted.
Service Adjustment Mode On
1. The CRT displays the item being adjusted.
Mode Category service Signal Type ntsc vchp 00000000 00000000 defl Display Item Item Data
4-3. REMOTE ADJUSTMENT BUTTONS AND INDICATORS
MUTING
hsiz 16
POWER
(Service Mode)
(Enter into memory)
DISPLAY
(Service Mode)
2. Press 1 or 4 on the Remote Commander to select the item. 3. Press 3 or 6 on the Remote Commander to change the data. 4. Press MUTING then ENTER to write into memory.
3 Item (Data up)
1 Disp. (Item up)
2 (Device Item Up)
4 Disp. (Item down)
Service Adjustment Mode Memory
Mode Category service Signal Type ntsc vchp 00000000 defl Display Item Item Data hsiz 16 write 00000000
6 Item (Data down)
5 (Device item down)
ENTER
(Enter into memory)
8 (Initialize)
1. Press 8 then ENTER on the Remote Commander to initialize.
Display Item hsiz 16 write 00000000 00000000 Carry out Step 1 when adjusting IDs 0-6 and when replacing and adjusting IC002 Item Data
0 (Remove from memory)
Mode
Category defl
VOLUME (+)
(Service Mode)
RM-Y180
service Signal Type ntsc vchp
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
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
4-4. SERVICE DATA LISTS
Service Group VERSION DEF 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
Fix/ Var Fix VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Name VER HSIZ HPOS VSIZ VPOS VLIN SCOR VBOW VANG TRAP PAMP UPIN LPIN TROT HBLK RBLK LBLK VBLK HMSK HDW AFC AFC1 AFCW CDMD HSS VSS SLDN SLUP JPSW HOSC EHT EHTG
Description Microprocessor version information 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 )
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
20
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group 16 : 9
Fix/ Var VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR
No. 1 2 3 4 5 6 7 8 9 10 11
Name VSIZ VPOS VLIN SCOR TRAP PAMP UPIN LPIN ABLG SCON VPW
Item name & ( Description ) 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
NTSC Init Data 55 37 30 20 30 0 34 32 15 10 1 NTSC Init Data 45 28 33 120 98 102 16 7 17 11 1 1 1
Service Group VP1
Fix/ Var VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR FIX FIX FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12 13
Name RDRV GDRV BDRV RCUT GCUT BCUT SCON SHUE SCOL SBRT RON GON BON
Item name & ( Description ) 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 )
Video 45 28 33 120 98 102 16 7 17 11
YUV 45 30 29 120 72 91 16 7 27 14
16:09 N/A N/A N/A N/A N/A N/A 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 FIX FIX FIX VAR VAR VAR FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Name BLLV MTRX AXIS SSHO SSHP SHPF SHCL SHMX ACLV AKBD AKBS REFP YNRC BKON BKAT BKRC BKDP BKSP
Item name & ( Description )
NTSC Init Data 1 0 52 10 15 1 0 15 0 2 1 0 15 1 15 4 soft cont'l 2
Video
YUV
16:09
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
26 31 0
25 30 0
N/A N/A N/A
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 FIX FIX FIX FIX FIX FIX FIX FIX FIX VAR VAR VAR VAR VAR FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
Name VMOF VMLO VMHI VMDL VMPL VMWD VMCL VMMX CKLV CKON ALFA YCMD VACL VAGA VAMX GAMM YDLY CDLY YOFF CBPF BGPP GDOF BDOF GCOF BCOF DCTV DCTG
Item name & ( Description ) VM GAIN(Off) ( VM LEVEL AT "OFF" SETTING ) 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 )
NTSC Init Data 2 4 8 6 0 0 0 15 1 0 2 0 0 soft cont'l 5 soft cont'l 1 0 0 0 9 9 14 11 28 30 soft cont'l
Video
YUV
16:09
1
0
N/A
1
3
N/A
9
28
N/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. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Name SCOL SHCL SHMX YNRC VMHI VMCL VMMX VAMX GAMM YNRS WSTH WSVA WSCA NRCH NRCL NRVL NRVH IPNC IPNV
Item name & ( Description ) SUB COLOR LEVEL 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 17 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
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group
Fix/ Var FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12
Name VPIC VBRI VCOL VHUE VSHA VVM VTRI VAPA VGMA VDCT VBKP TBKD
Item name & ( Description ) PICTURE BRIGHTNESS COLOR HUE SHARPNESS VM COLOR TEMP APERTURE G GAMMA DCT LV BLACK STRETCH DEPTH ( VIDEO ) BLACK STRETCH DEPTH ( TUNER )
PALLET = VIVID 63 27 37 31 31 2 0 5 3 23 3 3 NTSC Init Data 0 0 0 1 1 3 3 1 1 0 2 15
NTSC BA6 DATA (DEC) PALLET PALLET = STD = MOVIE 50 37 30 31 32 31 31 31 32 31 1 0 1 2 5 3 1 0 15 2 3 4 3 4
PALLET = PRO 31 31 31 31 21 0 1 0 0 2 7 7
Service Group Y
PALLET
Fix/ Var FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12
Name YNRS YTHR Y2D 2DFX CLPS VLPF CLPF BPFB BPFF BKTS VMG2 CLPT
Item name & ( Description ) YNR SW ( YNR ON) Y THR 2D ( Y SIGNAL THROUGH 2DYCS ) Y2D Fix ( Y SIGNAL GENERATE from 2DYCS ) C BPF Fix ( C SIGNAL GENERATE from H/V BPF only CLAMP CONTROL SW ( 0: CLAMP OFF. 1: CLAMP AUTO. 2: CLAMP ON ] VIDEO LPF ( Y_LPF [ ANALOG ] for adjust ) CHROMA LPF ( C_LPF [ ANALOG ] for adjust ) YCS HBPF BACK ( YCS HBPF SELECT [ BACK ] ) YCS HBPF FRONT ( YCS HBPF SELECT [ FRONT ] ) BS T2 IFON ( BLACK STRETCH RECOVER TIME OUT VMGAIN2 ( MODULATOR FEEDBACK GAIN CONTROL CLAMP KEEP TIMER ( CLAMP AUTO ON KEEP TIMER COUNT [ @ 100 MS ] )
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
25
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group C
Fix/ Var FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Name A1FL A1ON ACCS AASL BASL XFFR A2ON A3ON A2FL A3FL AXTH ACTH AVAV B2TH ACCP
Item name & ( Description ) AMP OFF1 L ( ANALOG ACC hysteresis ) AMP ON ( ANALOG ACC AMP ON LEVEL) ACC SW ( ACC ON/OFF ) AVE SEL ( C DECODER TIME CONSTANT [32, 16, 8, 1H ]) 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 )
A8 Init Data 90 4 0 2 0 0 4 4 64 64 30 10 3 0 0
Video
YUV
16:09
0
1
N/A
0
1
N/A
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
26
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group RGB
Fix/ Var FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Name AMUT PMUT CORL CORH COGL COGH COBL COBH ABLS ALSP ALRS ALAS ABLG ALS2 AKBM AKBP OSDL UVIN UVG UOFS VOFS AALG AALS UVDE UVDT
Item name & ( Description ) 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 ( U IN OFF SET ) 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 )
NTSC Init Data 0 1 212 0 197 0 176 0 0 0 2 9 5 2 0 16 0 0 0 7 15 0 1 0 0
Video
YUV
16:09
0 0
1 6
N/A N/A
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
27
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group DEFD
Fix/ Var FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Name HFFR HFUP JSWW EWCL XF0A BGST XPHA HRMP RPLU RPLB XF0B RPLS SSM VSAG AFC2 VRFL SSLP XPLU 8FSC 4FS2 CDM2 BGPC MHDL BFRE
Item name & ( Description ) AFC FREE RUN ( AFC1 FORCE FREE RUN ) HFREE UP ( H FREE RUN FREQUENCY UP [ 700 Hz ] VJP WIDTH ( JUMP PULSE WIDTH ) V/EW DAC CLK CONTROL ( EW/VRAMP DA CLOCK SELECT ) 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 )
NTSC Init Data 0 0 0 0 0 16 10 3 3 1 0 0 0 0 3 1 1 1 1 1 1 0 1 0
Video
YUV
16:09
0 16
0 1
N/A N/A
1 1
0 0
N/A N/A
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
28
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group DEFD
Fix/ Var FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
Name HRPP DSCK VBHK VPW DTH SLON VSSW AF2S VSL2 VSL1 VYUV VYVP VYHS VYHP VSHE VYRB VYLB
Item name & ( Description ) AFC2 RAMP POS ( FRAMP RRAMP H OUT CONTROL RANGE 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 Data 8 1 0 1 0 1 0 0 0 1 8 8 8 7 0 7 7
Video
YUV
16:09
1
1
0
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
29
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group OTHER
Fix/ Var FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12
Name PCLP VRT 14HI 14HD DSI DSD ADCD 4FSC WSTH WSVA WSCA VREF
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 ] )
NTSC Init Data 0 1 0 0 0 0 0 0 0 0 0 0 NTSC Init Data 0 25 25 0 25
Video
YUV
16:09
0 0 0 0 0
0 0 0 0 1
N/A N/A N/A N/A N/A
0 0
0 0
N/A N/A
Service Group OSD
Fix/ Var FIX FIX FIX FIX FIX
No. 1 2 3 4 5
Name HT OSLR OSLG OSDC OSLB
Item name & ( Description ) 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 )
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
30
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group H/W AKB
Fix/ Var FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX FIX
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Name HRIL HRIH HGIL HGIH HBIL HBIH HLM1 HLM2 HLM3 HAD1 HAD2 HAKE HASP HERL HLMC HPWL HPWC HFMT SPMT
Item name & ( Description ) H/W AKB R INI DATA L ( H/W AKB RED OUTPUT LOWER ) H/W AKB R INI DATA H ( H/W AKB RED OUTPUT UPPER ) H/W AKB G INI DATA L ( H/W AKB GREEN OUTPUT LOWER ) H/W AKB G INI DATA H ( H/W AKB GREEN OUTPUT UPPER ) H/W AKB B INI DATA L (H/W AKB BLUE OUTPUT LOWER) H/W AKB B INI DATA H (H/W AKB BLUE OUTPUT UPPER) AKB_LIM1<7:0> ( H/W AKB LIM1 ) AKB_LIM2<7:0> ( H/W AKB LIM2 ) AKA_LIM3<7:0> ( H/W AKB LIM3 ) AKB_ADD1<7:0> ( H/W AKB SPEED1 ) AKB_ADD2<7:0> ( H/W AKB SPEED2 ) AKB_EN ( H/W AKB MANUAL [ MCU ] / HARD AKB_SPEED ( H/W AKB SPEED ) AKB_SWERR<7:0> ( H/W AKB ERROR DET THRESH ) AKB_ERRC<7:0> ( H/W AKB ERROR DET TIME ) AKBSWPON<7:0> ( H/W AKB POWER ON TRESH ) AKB_PWERRC ( H/W AKB POWER ON TIME ) H/W AKB2 HOLD TIMER ( H/W AKB2 HOLD TIMER (@ 100 MSEC ) [ 0: No hold ] AKB POW ON MUTE EXIT ( AKB POWER ON MUTE EXIT TIMMER )
NTSC Init Data soft cont'l soft cont'l soft cont'l soft cont'l soft cont'l soft cont'l 6 12 21 2 6 1 3 40 20 4 90 20 120
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
31
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group AUDIO PROCESSOR
Fix/ Var VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR VAR
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Name SBAL SBAS STRE SRL BBOL BBOH BBSL BBSH BBGL BBGH BBTL BBTH BBDL BBDH VFIX AGCL VCOF
Item name & ( Description ) SBAL ( SUB BALANCE ) SBAS ( SUB BASS ) STRE ( SUB TREBLE ) SRL ( SURROUND LEVEL ) BBOL ( SURROUND OFF-BBE LOW ) BBOH ( SURROUND OFF-BBE HIGH) BBSL ( SIMULATE BBE LOW ) BBSH ( SIMULATE BBE HIGH ) BBGL ( WOW GAME BBE LOW ) BBGH ( WOW GAME BBE HIGH ) BBTL ( SRS BBE LOW ) BBTH ( SRS BBE HIGH ) BBDL ( Audio Processor Prologic BBE Low for DOLBY ) BBDH ( Audio Processor Prologic BBE High for DOLBY ) VFIX ( AUDIO OUTPUT FIX DATA ) AGCL ( AGC LEVEL ) RF OFFSET DATA
NTSC 21FA310 4 0 0 0 4 7 2 7 4 9 0 0 3 5 0 2 9 NTSC 21FA310 2 5 2 2 3 2 15
20FS120 4 6 7 0 0 0 0 0 0 0 0 0 0 0 0 2 9
21FM120 4 4 7 0 0 0 0 0 0 0 0 0 0 0 0 2 9
24FS120 4 7 7 0 0 0 0 0 0 0 0 0 0 0 0 2 9
Service Group AP2
Fix/ Var VAR VAR VAR VAR VAR VAR VAR
No. 1 2 3 4 5 6 7
Name BBEL BBEH BBOL BBSL BBGL AGCL DDOF
Item name & ( Description ) SUB AUDIO PROCESSOR PROLOGIC BBE LOW SUB AUDIO PROCESSOR PROLOGIC BBE HIGH SURROUND OFF-BBE LOW SIMULATE BBE LOW WOW GAME BBE LOW SUB AUDIO PROCESSOR AGC LEVEL DOLBY OFFSET DATA
20FS120 0 0 0 0 0 0 0
21FM120 0 0 0 0 0 0 0
24FS120 0 0 0 0 0 0 0
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
32
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Service Group
Fix/ Var No. FIX FIX FIX FIX FIX FIX FIX 1 2 3 4 5 6 7
Name DISP CCHP HRLW HRHG HSDT STPI RAPI
Item name & ( Description ) DISP ( OSD HORIZONTAL OFFSET ) CCHP ( FOR TILT DATA CALCULATION ) HRLW ( LOW LIMIT OF H-PULSE COUNTING WINDOW [ RF ] HRLG ( HIGH LIMIT OF H-PULSE COUNTING WINDOW [ RF ] HSDTCT ( H-PULSE DETECTION [ S-VIDEO ] STPI ( GRADUAL CONTRAST INCREASE STARTING LEVEL ) RAPI (GRADUAL CONTRAST INCREASE Vsync COUNTER)
MICROPROCESSOR
NTSC Init Data 55 80 16 64 8 40 10 NTSC Init Data 81 23 113 130 32 16 48 69
Service Group Feature
Fix/ Var VAR VAR VAR VAR VAR VAR VAR VAR
No.
Name ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7 Language related Video related Audio related Miscellaneous Miscellaneous Miscellaneous Miscellaneous Miscellaneous
Item name & ( Description )
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
33
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
4-5. ID MAP TABLE Model
KV-20FS120 KV-20FS120 KV-21FM120 KV-21FS120 KV-21FS120 KV-21FA310 KV-21FA310 KV-24FS120 KV-24FS120 KV-25FS120 KV-25FS120
Destination
US CND L NORTH L NORTH
ID-O ID-1 ID-2 ID-3 ID-4 ID-5 ID-6 ID-7
89 89 81 81 81 81 81 89 89 81 81 7 7 3 7 7 23 23 23 23 23 23 9 9 0 9 9 113 113 9 9 9 9 34 50 130 130 130 130 130 34 50 130 130 0 0 32 32 32 32 32 0 0 32 32 16 16 16 16 16 16 16 16 16 16 16 0 0 48 48 48 48 48 0 0 48 48 5 5 69 69 69 69 69 5 5 69 69
L SOUTH L NORTH L SOUTH US CND L NORTH L SOUTH
4-6. A BOARD ADJUSTMENTS H. Frequency (Free Run) Check
1. Input a TV mode (RF) with no signal. 2. Connect a frequency counter to base of Q502 (TP-25 H. DRIVE) on the A Board. 3. Check H. Frequency for 15735 ± 200 Hz.
5. Select SCON with 1 and 4 . 6. Adjust the value of SCON with 3 and 6 for 86 ± 3Vpp for 20/21 inch, and 96 ± 3Vpp for 24/25 inch.
76 3Vpp for 20/21 inch 82 3Vpp for 24/25 inch
V. Frequency (Free Run) Check
1. Select video 1 with no signal input. 2. Set the conditions for a standard setting. 3. Connect the frequency counter to TP-27 (V OUT) or CN515 pin 6 (V DY+) and ground on the A Board . 4. Check that V. Frequency shows 60 ± 4 Hz.
R ON: G ON: B ON:
ON ON ON
(1) (1) (1)
Drive (SCON)
1. Input a color-bar signal and set the level to 75%. 2. Set in Pro mode + PICTURE MAX. 3. Activate the Service Adjustment Mode.
7. Press MUTING then ENTER to save into the memory.
Mode
Category video
Display Item rdrv
Item Data
Signal Type
service ntsc vchp
R ON: G ON: B ON:
26
00000000 00000000
ON OFF OFF (1) (0) (0)
4. Connect an oscilloscope probe to CV Board, J1751Pin 12 (KR) (Red Out) .
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
34
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
Display Position Adjustment (DISP)
1. 2. 3. 4. Input a color-bar signal. Set to Service Adjustment Mode. Select DISP with 1 and 4 . Adjust values of DISP with 3 and 6 to adjust characters to the center. 5. Press MUTING then ENTER to save into the memory. 6. Check to see if the text is displayed on the screen.
V. Size Adjustment (VSIZ)
1. 2. 3. 4. 5. Input a crosshatch signal. Activate the Service Adjustment Mode. Select the VSIZ item with 1 and 4 . Adjust value of VPOS with 1 and 4 for the best vertical center. Press MUTING then ENTER to save into the memory.
Mode Category service micro Signal Type ntsc vchp
Display Item disp 48
Item Data
V. Center Adjustment (VPOS)
Perform this adjustment after performing H. Frequency (Free Run) Check. 1. Input a crosshatch signal. 2. Activate the Service Adjustment Mode. 3. Select the VPOS item with 1 and 4 . 4. Adjust value of VPOS with 3 and 6 for the best vertical center. 5. Press MUTING then ENTER to save into the memory.
00000000 00000000
Sub Bright Adjustment (SBRT)
1. 2. 3. 4. 5. Input a monoscope signal. Activate the Service Adjustment Mode. Set the PICTURE and BRIGHTNESS to minimum. Select the SBRT item with 1 and 4 . Adjust the values of SBRT with 3 and 6 to obtain a faintly visible crosshatch. 6. Press MUTING then ENTER to save into the memory.
H. Center Adjustment (HPOS)
Perform this adjustment after performing H. Frequency (Free Run) Check. 1. Input a crosshatch signal. 2. Activate the Service Adjustment Mode. 3. Select the HPOS item with 1 and 4 . 4. Adjust the value of HPOS with 3 and 6 for the best horizontal center. 5. Press MUTING then ENTER to save into the memory.
Sub Hue, Sub Color Adjustment (SHUE, SCOL)
1. 2. 3. 4. 5. 6. Input color-bar signal at 75%. Activate the Service Adjustment Mode. Set (PIC) to Max and (COL) to 50%. Connect an oscilloscope probe to CV Board, CN301Pin 4 Blue Out. Select the SHUE and SCOL item with 1 and 4 . While showing the SHUE item, adjust the waveform with 3 and 6 until the second and third bars show the same level (V2 = V3 < 0.15Vp-p). Set Sub Hue -2 Step. 7. While showing the SCOL item, adjust the waveform with 3 and 6 until the first and fourth bars show the same level (V1 = V4 < 0.15Vp-p). Set Sub Col +3 Step.
V1 V2 V3 V4
8. Press MUTING then ENTER to save into the memory.
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
35
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
H. Size Adjustment (HSIZ)
1. 2. 3. 4. 5. Input a monoscope signal. Activate the Service Adjustment Mode. Select HSIZ with 1 and 4 . Adjust with 3 and 6 for the best horizontal size. Press MUTING then ENTER to save into the memory.
V. Angle (VANG), V. Bow (VBOW), Upper PIN (UPIN) and Low PIN (LPIN) Adjustments
1. 2. 3. 4. 5. Input a crosshatch signal. Activate the Service Adjustment Mode. Select VANG, VBOW, UPIN, and LPIN with 1 and 4 . Adjust with 3 and 6 for the best picture. Press MUTING then ENTER to save into the memory.
V ANGLE (VANG)
V. Linearity (VLIN), V. Correction (SCOR), PIN Amp (PAMP), and Horizontal Trapezoid (HTRP) Adjustments
1. 2. 3. 4. 5. Input a crosshatch signal. Activate the Service Adjustment Mode. Select VLIN, SCOR, PAMP, and HTRP with with 1 and 4 . Adjust with 3 and 6 for the best horizontal size. Press MUTING then ENTER to save into the memory.
V LINEARITY (VLIN)
V BOW (VBOW)
UPPER PIN (UPIN)
LOW PIN (LPIN)
V CORRECTION (SCOR)
Service Adjustment Mode Memory
1. After completing all adjustments, press 0 then ENTER . Read From Memory
PIN AMP (PAMP)
Mode Category service defl
Display Item vbow 7
Item Data Green 0
HORIZONTAL TRAPEZOID (HTRP)
Signal Type
ntsc Red vchp 00000000 00000000 ENTER
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
36
KV-20FS120/21FM120/21FS120/21FA310/24FS120/25FS120
SECTION 5: DIAGRAMS 5-1. CIRCUIT BOARDS LOCATION
The components identified by shading and ! symbol are critical for safety. Replace only with part number specified. The symbol indicates a fast operating fuse and is displayed on the component side of the board. Replace only with fuse of the same rating as marked.
Les composants identifies per un trame et une marque ! sont critiques pour la securite. Ne les remplacer que par une piece portant le numero specifie. Le symbole indique une fusible a action rapide. Doit etre remplace par une fusible de meme yaleur, comme maque.
HR Board (KV-21FA310 Only) K Board (KV-21FA310 Only)
CV Board A Board HB Board (All except KV-21FA310)
The components identified by X in this basic schematic diagram have been carefully factory-selected for each set in order to satisfy regulations regarding X-ray radiation. Should replacement be necessary, replace only with the value originally used.
5-2. PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM INFORMATION
All capacitors are in µF unless otherwise noted. pF : µµF 50WV or less are not indicated except for electrolytics and tantalums. All electrolytics are in 50V unless otherwise specified. All resistors are in ohms. k=1000, M=1000k Indication of resistance, which does not have one for rating electrical power, is as follows: Pitch : 5mm Rating electrical power :
1
When replacing components identified by Y, make the necessary adjustments as indicated. If the results do not meet the specified value, change the component identified by X and repeat the adjustment until the specified value is achieved. (Refer to Section 3: Safety Related Adjustments on Page 17.) When replacing the parts listed in the table below, it is important to perform the related adjustments. Part Replaced (Y) 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, R