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Sony TRINITRON KV-T25SN81 Service Manual
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Sony TRINITRON KV-T25SN81 Service Manual

Sony TRINITRON KV-T25SN81 Service Manual

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SERVICE MANUAL

BG-1S
CHASSIS
MODEL
COMMANDER DEST.
CHASSIS NO.
MODEL
COMMANDER DEST. CHASSIS NO.
KV-T25SN81
RM-870 New Zealand SCC-K37F-A
TRINITRON
COLOR TV
®

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Summary of Contents for Sony TRINITRON KV-T25SN81

  • Page 1: Service Manual

    SERVICE MANUAL BG-1S CHASSIS MODEL COMMANDER DEST. CHASSIS NO. MODEL COMMANDER DEST. CHASSIS NO. KV-T25SN81 RM-870 New Zealand SCC-K37F-A TRINITRON COLOR TV ®...
  • Page 2 CARBON PAINTED ON THE CRT, AFTER REMOVING THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE ANODE. THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. – 2 –...

  • Page 3: Table Of Contents

    KV-T25SN81 RM-870 TABLE OF CONTENTS Section Title Page Section Title Page 5. DIAGRAMS SELF DIAGNOSIS FUNCTION ....... 5-1. Block Diagram ............1. GENERAL 5-2. Circuit Boards Location ......................5-3. Schematic Diagrams and Printed Wiring Boards. 2. DISASSEMBLY (1) Schematic Diagram of A Board ......

  • Page 4: Self Diagnosis Function

    KV-T25SN81 RM-870 SELF DIAGNOSIS FUNCTION If no acknowledgement is returned from a device which is turned "ON", the device has a problem. In this case, one of the LED's responding to the problem device will flicker a defined number of times.

  • Page 5: Disassembly

    SECTION 2 DISASSEMBLY 2-1. REAR COVER REMOVAL 2-3. F1 BOARD REMOVAL F1 board 2 Two screws (BVTP 4×16) 3 One screw (BVTP 3×16) 1 Two screws (BVTP 4×16) 2-2. A BOARD REMOVAL 2-4. SERVICE POSITION A board Lever Lever A board...

  • Page 6: Replacement Of Parts

    2-5. REPLACEMENT OF PARTS 2-6. DEMAGNETIZATION COIL REMOVAL For replacement of the Multi Button, Power Button and Light Guide, cut the welded portions from them, exchange with the new parts, and fix them with screws (+BVTP) respectively. 2-5-1. REPLACEMENT OF MULTI BUTTON 2 DGC holder Remove the claw Two screws...

  • Page 7: Picture Tube Removal

    2-7. PICTURE TUBE REMOVAL NOTE : The picture tube for this model are upside-down, and the position for the anode-cap and tension spring are changed accordingly. 3 F1 board 4 C board 7 VM board 2 Using a thumb press down then pull up the rubber cap firmly in the direction 5 Deflection yoke indicated by the arrow b.

  • Page 8: Set-Up Adjustments

    KV-T25SN81 RM-870 SECTION 3 SET-UP ADJUSTMENTS • The following adjustments should be made when a complete Perform the adjustments in the following order : realignment is required or a new picture tube is installed. 1. Beam Landing • These adjustments should be performed with rated power 2.

  • Page 9: Convergence

    KV-T25SN81 RM-870 3-2. CONVERGENCE • Preparation : Operation of the V.STAT magnet. • If the V-STAT magnet is moved in the direction of the a and Before starting this adjustment, adjust the focus, horizontal size b arrows, the red, green and blue dots move as shown below.
  • Page 10 KV-T25SN81 RM-870 (2) Dynamic Convergence Adjustment Preparation : • Before starting this adjustment, adjust the horizontal static 3. Move the deflection yoke as shown in the figure below and convergence and the vertical static convergence. optimize the convergence. 1. Slightly loosen the deflection yoke screws.

  • Page 11: Focus Adjustment

    KV-T25SN81 RM-870 DATA 3-3. FOCUS ADJUSTMENT Adjust FOCUS control on the flyback transformer for the best SERVICE focus. Adjustment Item Item number WRITE MUTING Executes the writing Focus a. AN ITEM OF ADJUSTMENT 3-4. G2 (SCREEN) AND WHITE BALANCE ADJUSTMENTS...

  • Page 12: Circuit Adjustments

    KV-T25SN81 RM-870 SECTION 4 CIRCUIT ADJUSTMENTS 4-1. ADJUSTMENTS WITH COMMANDER Service adjustments are made with the RM-870 that comes with this unit. [1], [4] Raise/lower the service item number [3], [6] Raise/lower the data [MUTING] Writes Entering service mode Executes the writing With the unit on standby ↓...

  • Page 13: Adjustment Method

    KV-T25SN81 RM-870 4-2. ADJUSTMENT METHOD Item Number 08 Use the same method for Items Number 00-4B. Use [1] and [4] to This explanation uses V-SHIFT as an example. select the adjustment item, use [3] and [6] to adjust, write with 1.
  • Page 14 KV-T25SN81 RM-870 Adjustment Item Table Item Adjustment Data Initial Standard data Note Device number Item range data 00–3F H SHIFT TDA8375A 00–3F H SIZE TDA8375A 00–3F PIN AMPLITUDE TDA8375A 00–3F CORNER PIN TDA8375A 00–3F TILT TDA8375A 00–3F V SLOPE TDA8375A 00–3F...
  • Page 15 KV-T25SN81 RM-870 Adjustment Item Table Item Adjustment Data Initial Standard data Note Device number Item range data µ . CON 00–3F BLK OFF PICTURE µ . CON 00–3F H BLK LEFT WIDTH µ . CON 00–3F H BLK RIGHT WIDTH µ...

  • Page 16: A Board Adjustment After Ic003 (Memory) Replacement

    KV-T25SN81 RM-870 4-3. A BOARD ADJUSTMENT AFTER IC003 4-4. PICTURE DISTORTION ADJUSTMENT (MEMORY) REPLACEMENT Item Number 00 – 08 1. Enter to Service Mode. 00 HSF (H SHIFT) HSF (H SHIFT) 2. Press commander buttons [5] and [0] (Data Initialize), and [2] and [0] (Data Copy) to initialize the data.
  • Page 17 KV-T25SN81 RM-870 MEMO ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○...
  • Page 18 KV-T25SN81 RM-870 MEMO ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○...

  • Page 19: Diagrams 5-1. Block Diagram

    KV-T25SN81 KV-T25SN81 KV-T25SN81 RM-870 RM-870 RM-870 5-4. SEMICONDUCTORS DIODE TRANSISTOR D1NL20 ERC06-15S ERD29-08J DTA114EKA-T146 2SC2669-0 ST24C08FB6 (8PIN) UPC4558G2 (8PIN) PQ09RE11 EL1Z RN4Z RU4AM-T3 DTC114EKA-T146 CXA1110BS (30PIN) GP08D S3L20UF4 UN2211 CXP85224A-072S (64PIN) RGP02-17EL-6433 UN2213 P83C654FBP/540 (40PIN) CATHODE CATHODE UN2216 SAA5281ZP/E (52PIN)

  • Page 20: Exploded View

    KV-T25SN81 KV-T25SN81 SECTION 6 RM-870 RM-870 EXPLODED VIEW NOTE: • • Items with no part number and no Items marked " * " are not stocked since The components identified by they are seldom required for routine shading and mark ! are critical description are not stocked because they service.

  • Page 21: Electrical Parts List

    KV-T25SN81 KV-T25SN81 RM-870 RM-870 SECTION 7 The components identified by shading ELECTRICAL PARTS LIST and mark ! are critical for safety. Replace only with part number specified. NOTE: REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK •...
  • Page 22 KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK C806 1-126-960-11 ELECT CN603 * 1-508-786-00 PIN, CONNECTOR (5MM PITCH) 2P...

  • Page 23: Circuit Boards Location

    KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK D860 8-719-911-19 DIODE 1SS119-25 JR116 1-216-295-91 SHORT D891...
  • Page 24 KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK <RESISTOR> R180 1-216-033-00 RES,CHIP 1/10W R181 1-216-033-00 RES,CHIP...
  • Page 25 KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK R344 1-216-129-00 RES,CHIP 2.2M 1/10W R624 1-215-881-11 METAL OXIDE...
  • Page 26 KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK R1205 1-216-023-00 RES,CHIP 1/10W <SURFACE WAVE FILTER> R1206...

  • Page 27: Schematic Diagrams And Printed Wiring Boards. 29 (1) Schematic Diagram Of A Board

    KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK C1229 1-126-157-11 ELECT 10MF <IC> C1230 1-164-004-11 CERAMIC CHIP 0.1MF...
  • Page 28 KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK D703 8-719-911-19 DIODE 1SS119-25 R1227 1-216-295-91 SHORT D707...
  • Page 29 KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK 1-163-231-11 CERAMIC CHIP 15PF R740 1-247-807-31 CARBON 1/4W...
  • Page 30 KV-T25SN81 RM-870 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK <CRYSTAL> <TRANSISTOR> 1-579-266-31 CRYSTAL VIBRATOR 8-729-120-28 TRANSISTOR 2SC1623-L5L6...

  • Page 31: Schematic Diagrams Of A3, F1 And V1 Boards

    METAL OXIDE R1791 1-249-413-11 CARBON 1/4W R1812 1-249-425-11 CARBON 4.7K 1/4W R1851 1-249-393-11 CARBON 1/4W Sony Corporation English 99EG70068-1 SONY TV Industries (M) Sdn. Bhd. Printed in Malaysia © 9-965-743-01 TV Business of General Area 1999. 5 – 64 –...

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