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Sony TRINITRON KV-20FV10 Service Manual
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Sony TRINITRON KV-20FV10 Service Manual

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SERVICE MANUAL

MODEL
KV-20FV10
COMMANDER
DEST
U845 mı ˝ 4 ı ˝ / 641l ı ˝ c CA- S 30001 Tcı A 53 NO. U 845 mı ˝ 4 8. 4 641l ı ˝ c CCA- S 30001 Tcı A 53 NO. U 845 mı ˝ 4 8. 4 645l ı ˝ c ACA- S 30001 Tcı A 53 NO.
U845 mı˝4ı˝/ 646.84 lı˝cCA-S30001 TcıA53 NO.
BA-4C
CHASSIS
CHASSIS NO.

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Summary of Contents for Sony TRINITRON KV-20FV10

  • Page 1: Service Manual

    BA-4C SERVICE MANUAL CHASSIS MODEL COMMANDER DEST CHASSIS NO. KV-20FV10 U845 mı˝4ı˝/ 646.84 lı˝cCA-S30001 TcıA53 NO. U845 mı ˝ 4 ı ˝ / 641l ı ˝ c CA- S 30001 Tcı A 53 NO. U 845 mı ˝ 4 8. 4 641l ı ˝ c CCA- S 30001 Tcı A 53 NO. U 845 mı ˝ 4 8. 4 645l ı ˝ c ACA- S 30001 Tcı A 53 NO.

  • Page 2: Specifications

    • The ( ) SRS (SOUND RETRIEVAL SYSTEM) is Dipole antenna manufactured by Sony Corporation under license Connecting cables VMC-810S/820S, VMC-720M, from SRS Labs, Inc. It is covered by U.S. Patent No. YC-15V/30V, RK74A 4,748,669. Other U.S. and foreign patents pending.

  • Page 3: Table Of Contents

    KV-20FV10/21FV10/21FV10C/25FV10A TABLE OF CONTENTS Section Title Page Warnings and Cautions ................................4 Self-Diagnostic Function ................................4 Safety Check-Out Instructions ..............................7 GENERAL ................................8 DISASSEMBLY 2-1. Rear Cover Removal ..............................14 2-2. A Board Removal ................................14 2-3. Service Position ................................14 2-4.

  • Page 4: Warnings And Cautions

    SECURITE DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES SONY PARTS WHOSE PART NUMBERS APPEAR AS COMPOSANTS SONY DONT LE NUMERO DE PIECE EST INDIQUE DANS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS LE PRESENT MANUEL OU DANS DES SUPPLEMENTS PUBLIES PAR SONY.
  • Page 5 KV-20FV10/21FV10/21FV10C/25FV10A Display of Standby/Timer LED Flash Count 2 times 4 times 5 times LED ON 0.3 sec. STANDBY/TIMER LED LED OFF LED OFF 0.3 sec. 3 sec. Diagnostic Item Flash Count* +B overcurrent 2 times Vertical deflection stopped 4 times White balance failure 5 times *One flash count is not used for self-diagnostic.
  • Page 6 KV-20FV10/21FV10/21FV10C/25FV10A 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.

  • Page 7: Safety Check-Out Instructions

    KV-20FV10/21FV10/21FV10C/25FV10A SAFETY CHECK-OUT After correcting the original service problem, perform the Leakage Test following safety checks before releasing the set to the The AC leakage from any exposed metal part to earth customer: ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 1.

  • Page 8: General

    SECTION 1 GENERAL The instructions mentioned here are partial abstracts from the Operating Instruction Manual. The page numbers shown reflect those of the Operating Instruction Manual. Connecting Your TV Connecting Additional Equipment TV and VCR Read this chapter before setting up your TV for the first time. This section covers basic connections in addition to any optional equipment you may be connecting.
  • Page 9 TV and Cable Box TV, VCR, and Cable box Cable box Connect the coaxial cable from the wall to the IN jack on your cable (Optional connection) box. Cable Connect a coaxial cable (not supplied) from the OUT jack on your cable box to the VHF/UHF IN jack on the TV.
  • Page 10 TV, Digital Satellite Receiver and VCR TV and Digital Satellite Receiver Satellite antenna From cable/ antenna Cable Satellite receiver Satellite Satellite receiver antenna cable Connect the cable from your satellite antenna to SATELLITE IN on the satellite receiver. Connect the cable from your satellite antenna to SATELLITE IN on Attach the coaxial connector from your cable or antenna to the satellite receiver.
  • Page 11 Connecting an audio system Connecting a Camcorder Using audio connectors, connect AUDIO OUT on your TV to one of the Using A/V cables, connect AUDIO and VIDEO OUT on your camcorder unused line inputs (e.g. TV, AUX, TAPE 2) on your stereo. to AUDIO and VIDEO IN on your TV.

  • Page 12: Using The Remote Control And Basic Functions

    (see page 29). MUTING Instantly turns off the sound. Press again or press to restore sound. SYSTEM OFF Powers off all Sony equipment at once. TV/VIDEO Cycles through available video inputs. Moves the cursor in the on- screen menus. Press the arrow...

  • Page 13: Troubleshooting

    If, after reading these operating instructions, you have additional questions related to the use of your picture, good Adjust BRIGHTNESS in the VIDEO menu (page 15). Sony television, please call our Direct Response Center at 1-800-222-SONY (7669) (U.S. residents sound Check the antenna and/or cable connections (page 3).

  • Page 14: Disassembly

    KV-20FV10/21FV10/21FV10C/25FV10A SECTION 2 DISASSEMBLY 2-1. REAR COVER REMOVAL KV-25FV10A KV-20FV10/21FV10/21FV10C Rear Cover Rear Cover Six Screws Four Screws (+BVTP 4x16) (+BVTP 4x16) Two Screws Two Screws (+BVTP 3x10) (+BVTP 3x10) 2-2. A BOARD REMOVAL 2-3. SERVICE POSITION C Board V Board G Board V Board C Board...

  • Page 15: Picture Tube Removal

    KV-20FV10/21FV10/21FV10C/25FV10A 2-4. PICTURE TUBE REMOVAL G Board WARNING: BEFORE REMOVING A Board THE ANODE CAP Speaker High voltage remains in the CRT even Degaussing Coil Tuner after the power is disconnected. To avoid electric shock, discharge CRT Tension Spring (B) before attempting to remove the anode C Board cap.

  • Page 16: Set-Up Adjustments

    KV-20FV10/21FV10/21FV10C/25FV10A SECTION 3 SET-UP ADJUSTMENTS The following adjustments should be made when Perform the adjustments in order as follows: 1. Beam Landing a complete realignment is required or when a new 2. Convergence picture tube is installed. 3. Focus These adjustments should be performed with rated 4.

  • Page 17: Convergence

    KV-20FV10/21FV10/21FV10C/25FV10A 3-2. CONVERGENCE Horizontal Static Convergence Before starting convergence adjustments: If the blue dot does not converge with the red and green dots, perform the following: 1. Perform FOCUS, V.LIN AND V.SIZE adjustments. 1. Move BMC magnet (a) to correct insufficient H. Static 2.

  • Page 18: Focus

    KV-20FV10/21FV10/21FV10C/25FV10A 3-3. FOCUS TLH Plate Adjustment 1. Adjust FOCUS control for best picture. • Input crosshatch pattern. • Adjust PICTURE QUALITY to standard, PICTURE and BRIGHTNESS to 50%, and OTHER to standard. • Adjust the Horizontal Convergence of red and blue dots by tilting the TLH plate on the deflection yoke.

  • Page 19: Method Of Setting The Service Adjustment Mode

    KV-20FV10/21FV10/21FV10C/25FV10A 3-5. METHOD OF SETTING THE SERVICE ADJUSTMENT MODE Service Mode Procedure 1. Standby mode (power off). Display Channel 5 Sound volume Power on the Remote Commander (press each button within a second). Service Adjustment Mode In 1. The CRT displays the item being adjusted. Disp.

  • Page 20: Safety Related Adjustments

    KV-20FV10/21FV10/21FV10C/25FV10A SECTION 4 SAFETY RELATED ADJUSTMENTS 4-1. R582 AND R584 (R584 for KV-25FV10A Hold-down Readjustment ONLY)CONFIRMATION METHOD If the setting indicated in step 2 of Hold-down Operation (HV HOLD-DOWN CONFIRMATION) AND Confirmation cannot be met, readjustment should be performed READJUSTMENTS by altering the resistance value of R582 and/or R584 components marked with The following adjustments should always be performed when...
  • Page 21 KV-20FV10/21FV10/21FV10C/25FV10A DIGITAL MULTIMETER – TP600 T505 ABL11 R582 R584 C574 AMMETER POWER DIGITAL 3mA dc range SUPPLY MULTIMETER 1SS119 – – – Figure 1 — 21 —...

  • Page 22: Circuit Adjustments

    KV-20FV10/21FV10/21FV10C/25FV10A SECTION 5 CIRCUIT ADJUSTMENTS ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER Use the Remote Commander (RM-Y168) to perform the circuit adjustments in this section. NOTE: Test Equipment Required: • Pattern generator • Frequency counter • Digital multimeter • Audio oscillator 5-1. Setting the Service Adjustment Mode 5-2.

  • Page 23: Adjustment Items

    KV-20FV10/21FV10/21FV10C/25FV10A Adjustment Items INITIAL DATA PALM/ NTSC PALN VIDEO DATA AVERAGE ITEM FUNCTION RANGE 20” 25” 20” 25” DATA HSIZ HORIZONTAL SIZE ADJ. 0-63 HPOS HORIZONTAL POS. ADJ. 0-63 VBOW VRT LINE BOWING ADJ. 0-15 VANG VRT LINE BOW SLANT ADJ. 0-15 TRAP HORIZ.

  • Page 24: A Board Adjustments

    KV-20FV10/21FV10/21FV10C/25FV10A INITIAL DATA PALM/ NTSC PALN VIDEO DATA AVERAGE ITEM FUNCTION RANGE 20” 25” 20” 25” DATA HOSC H VCO OSCILLATION FREQ 0-15 V SYNC SLICE LEVEL 0, 1 H SYNC SLICE LEVEL 0, 1 HMSK 0, 1 VTMS SELECT SIGNAL VTIM PIN CDMD V CNT DWN MODE SWITCHING AFC LOOP GAIN SWITCHING FIFR...
  • Page 25 KV-20FV10/21FV10/21FV10C/25FV10A 3. Activate the Service Adjustment Mode. 4. Select the SBRT item with 4. Set both GON and BON items. Using 5. Adjust the values of SBRT with to obtain a faintly visible crosshatch. set each to the following values. Leave RON set to 1. 6.

  • Page 26: Service Adjustment Mode Memory

    KV-20FV10/21FV10/21FV10C/25FV10A H. Center Adjustment (HPOS) V. Angle (VANG), V. Bow (VBOW), Upper pin (UPIN) and Low Pin (LPIN) Adjustments Perform this adjustment after performing H. Frequency (Free Run) check. 1. Input a crosshatch signal. 1. Input a crosshatch signal. 2. Activate the Service Adjustment Mode. 2.

  • Page 27: Diagrams

    KV-20FV10/21FV10/21FV10C/25FV10A SECTION 6 6.2 CIRCUIT BOARD LOCATIONS DIAGRAMS 6.1 BLOCK DIAGRAM • When replacing parts shown in the table below, be sure to perform the related adjustments. Part Replaced ( ) Adjustment ( ) HV HOLD-DOWN DY, CRT, C507, C520, C573, C574, (R582, R584) C575, D572, D573, D574, IC521, IC301, R578, R579, R582, R583,...
  • Page 28 KV-20FV10/21FV10/21FV10C/25FV10A [TUNING CONTROL, Y/C/J, DEFLECTION, TUNER/IF, AUDIO, MTS] A BOARD TRANSISTOR A BOARD WAVEFORMS A BOARD IC VOLTAGE LIST A BOARD MARK (*) LIST VOLTAGE LIST KV-20FV10 KV-20FV10 IC001 IC002 TU101 REF NO. LOC. KV-25FV10A KV-21FV10 KV-21FV10C REF NO. LOC. KV-25FV10A KV-21FV10 KV-21FV10C...
  • Page 29 KV-20FV10/21FV10/21FV10C/25FV10A A BOARD SCHEMATIC DIAGRAM C BOARD SCHEMATIC DIAGRAM C BOARD IC VOLTAGE LIST IC1707 VOLT IC1751 VOLT 205.0 145.0 141.0 132.0 All voltages are in V C BOARD MARK (*) LIST KV-20FV10 KV-21FV10 REF NO. LOC. KV-25FV10A KV-21FV10C R1762 #: Not Mounted [CRT DRIVE, RGB DRIVE] C BOARD WAVEFORMS...

  • Page 30: Circuit Board Location

    KV-20FV10/21FV10/21FV10C/25FV10A G BOARD SCHEMATIC DIAGRAM [POWER SUPPLY] HZ BOARD SCHEMATIC DIAGRAM (KV-25FV10A ONLY) G BOARD MARK (*) LIST [AC POWER SWITCH] (KV-25FV10A ONLY) KV-21FV10 KV-21FV10 REF NO. LOC. KV-25FV10A KV-21FV10C KV-20FV10 REF NO. LOC. KV-25FV10A KV-21FV10C KV-20FV10 C600 0.47µF 300V 0.47µF 300V 0.47µF 125V JW637...

  • Page 31: A Board

    KV-20FV10/21FV10/21FV10C/25FV10A V BOARD SCHEMATIC DIAGRAM (KV-20FV10/21FV10/21FV10C ONLY) V BOARD SCHEMATIC DIAGRAM (KV-25FV10A ONLY) V BOARD TRANSISTOR [VELOCITY MODULATION] (KV-20FV10/21FV10/21FV10C ONLY) [VELOCITY MODULATION] (KV-25FV10A ONLY) V BOARD TRANSISTOR VOLTAGE LIST (KV-25FV10A ONLY) VOLTAGE LIST (KV-20FV10/21FV10/21FV10C ONLY) Q961 Q1961 Q962 Q1962 Q963 134.4 83.7 134.8...
  • Page 32 KV-20FV10/21FV10/21FV10C/25FV10A A BOARD IC BLOCK DIAGRAMS A BOARD: IC301 CXA2131S A BOARD: IC301 CXA2135S (KV-20FV10/21FV10/21FV10C) (KV-25FV10A ONLY) A BOARD: IC202 NJM4558M-TE2 EYUV CLAMP <FSC SW> ABL FIL YUV SW <YSEL> YUVOUT ABL IN <YUVOUT> DEMOD. <HUE> C VCO OUT1 ABL/PEAK LIM DPIC CLAMP <ABL MODE>...

  • Page 33: Semiconductors

    KV-20FV10/21FV10/21FV10C/25FV10A 6-4. SEMICONDUCTORS 2SC5426-01 2SC3209LK-TP 2SA1309A 2SB709A LETTER SIDE 2SC3311A 2SD601A 2SD2144S 2SA1091O-TPE2 2SK2845 2SA1837 2SD1292 2SC4159-E ERC04-06S 1SS83TD RD9.1EW-T1 1SS133T-77 ERC06-15S D1NL2OU-TA D1N2OR-TA MTZJ-T-77-2.2A EL1Z-V1 D1NS4-TA MTZJ-T-77-5.1C ERA22-08TP3 MTZJ-T-7712C MTZJ-T-775.6C GP08DPKG23 MTZJ-T-77-20B MTZJ-T-77-7.5A RGP02-17PKG23 MTZJ-T-77-33B MTZJ-T-77-8.2B RGP10GPKG3 MTZJ-T-77-39 MTZJ-T-77-10B RGP10GPKG23 RD3.3ES-T1B MTZJ-T-7730D...

  • Page 34: Exploded View

    REF. NO. PART NO. DESCRIPTION REMARK X-4036-880-1 BEZNET ASSY A-1311-807-A G (VAR) MOUNTED PC (21FV10/21FV10C ONLY) 4-046-161-01 EMBLEM (NO.8), SONY A-1298-960-A A COMPLETE PC BOARD 4-068-307-01 BUTTON, MULTI (20FV10/21FV10 ONLY) 4-068-308-01 GUIDE, LED A-1298-998-A A COMPLETE PC BOARD (21FV10C ONLY)

  • Page 35: Chassis (Kv-25Fv10A Only)

    DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK X-4036-359-1 BEZNET ASSY 1-453-306-11 FBT ASSY NX-4011//X4J4 4-046-160-11 EMBLEM (NO.9), SONY 1-766-374-11 PLUG, F-PIN 4-068-307-01 BUTTON, MULTI 8-598-431-00 TUNER, FSS BTF-WA411 4-068-308-11 GU DE, LED 4-068-303-01 COVER, REAR 4-068-309-01 BUTTON, FUNCTION 4-068-305-01 BOX, SPEAKER...
  • Page 36 KV-20FV10/21FV10/21FV10C/25FV10A SECTION 8 ELECTRICAL PARTS LIST Note: • The components identified by in this manual have been carefully factory- selected for each set in order to satisfy The components identified by shading regulations regarding X-ray radiation. and mark are critical for safety. Replace Should replacement be required, replace only with part number specified.
  • Page 37 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.

  • Page 38: C Board

    KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.

  • Page 39: G Board

    KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 40 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 41 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.

  • Page 42: Hz Board

    KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.

  • Page 43: Board

    KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 44 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by in this manual have been The components identified by shading carefully factory-selected for each set in order to satisfy and mark are critical for safety. regulations regarding x-ray radiation. Should replacement Replace only with part number specified. be required, replace only with the value originally used.
  • Page 45 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 46 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 47 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 48 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 49 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 50 KV-20FV10/21FV10/21FV10C/25FV10A Note: Note: The components identified by shading and mark Les composants identifies per un trame et une marque critical for safety. Replace only with part number sont critiques pour la securite. Ne les remplacer que par specified. une piece portant le numero specifie. REF.NO.
  • Page 51 KV-20FV10/21FV10/21FV10C/25FV10A N O T E S : — 67 —...

  • Page 52: Electrical Parts List

    KV-20FV10/21FV10/21FV10C/25FV10A N O T E S : — 68 —...
  • Page 53 KV-20FV10/21FV10/21FV10C/25FV10A Sony Corporation English Sony Technology Center 99FS7441-1 Product Quality Division Printed in U.S.A. 9-965-871-01 Service Promotion Department © 1999.7 — 70 —...

This manual is also suitable for:

Kv-21fv10Kv-21fv10cKv-25fv10a

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