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Sony TRINITRON KV-XF25M81 Service Manual

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Self Diagnosis
Supported model

SERVICE MANUAL

BG-3S
CHASSIS
MODEL
COMMANDER DEST. CHASSIS NO.
MODEL
COMMANDER DEST. CHASSIS NO.
KV-XF25M81
RM-954
ME
SCC-U16Y-A
TRINITRON
COLOR TV
®

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Summary of Contents for Sony TRINITRON KV-XF25M81

  • Page 1: Service Manual

    Self Diagnosis Supported model SERVICE MANUAL BG-3S CHASSIS MODEL COMMANDER DEST. CHASSIS NO. MODEL COMMANDER DEST. CHASSIS NO. KV-XF25M81 RM-954 SCC-U16Y-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-XF25M81 RM-954 TABLE OF CONTENTS Section Title Page Section Title Page SELF DIAGNOSIS FUNCTION 5. DIAGRAMS ........ 4 5-1. Block Diagram ............41 1. GENERAL ................ 8 5-2. Frame Schematic Diagram ........44 Circuit Boards Location .......... 47 2. DISASSEMBLY 5-4.
  • Page 4 KV-XF25M81 RM-954 SELF DIAGNOSTIC FUNCTION The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically begin to flash. The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference.
  • Page 5 KV-XF25M81 RM-954 DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT 2 times 5 times Lamp ON 0.3 sec. Lamp OFF 3 sec. Lamp OFF 0.3 sec. STANDBY/SLEEP lamp Diagnostic Item Flash Count* +B overcurrent/overvoltage 2 times Vertical deflection stopped White balance failure 5 times * One flash count is not used for self-diagnostic.
  • Page 6 KV-XF25M81 RM-954 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 occurances of failure for confirmation on the screen: [To Bring Up Screen Test] In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below: [Screen display] / channel [5] / Sound volume [-] / Power ON...
  • Page 7 KV-XF25M81 RM-954 SELF-DIAGNOSTIC CIRCUIT IC301 IC001 IC003 Y/CHROMA JUNGLE SYSTEM MEMORY FROM IK-IN IO-8DAT B-DAT FROM O-LED [+B] Q604 C PROTECT IO-SDAT [V] Q509/507 [+B overcurrent ªOCPº] Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to ON and the voltage to pin 18 of IC301 should go down when V.SYNC is more than seven...
  • Page 8 SECTION 1 The operating instructions mentioned here are partial abstracts from the Operating Instruction Manual. The page numbers of GENERAL the Operating Instruction Manual remain as in the manual. Using Your New TV WARNING • Dangerously high voltages are present inside the TV. Getting Started •...

  • Page 9: Connecting Optional Components

    Connecting optional components Notes • If you connect a monaural VCR, connect the yellow plug to (the yellow You can connect optional audio/video components, such as a VCR, multi disc player, jack) and the black plug to -L (MONO) (the white jack). camcorder, video game or stereo system.

  • Page 10: Securing The Tv

    Securing the TV Watching the TV ¤ To prevent the TV from falling, secure the TV using one of the following methods: This section explains functions used … while watching TV. Most operations can be done using the remote. With the supplied screws, attach the band to the TV stand and to the rear of the TV using the provided hole.
  • Page 11 Watching the TV (continued) Setting the Wake Up timer Additional tasks Press until the Do this WAKE UP TIMER:10M desired period of time After 10 minutes Turn off temporarily Press u. The u indicator on the TV lights up red. appears.

  • Page 12: Viewing Your Favorite Channels

    Advanced Operations Selecting the Viewing your SOUND picture and sound MODE SURROUND FAVORITE favorite channels SOUND MODE PIC MODE MENU modes PIC MODE Number ENTER buttons You can display and select six of your favorite channels directly from your TV You can select picture and sound modes screen.

  • Page 13: Viewing Teletext

    Viewing Teletext Listening with surround sound SOUND MODE SURROUND FAVORITE TV stations broadcast an information SURROUND … PIC MODE MENU service called Teletext via some TV channels. Teletext allows you to receive ENTER The surround feature enables you to various information, such as shares enjoy the sound effects of a concert hall market or news.

  • Page 14: Introducing The Menu System

    Press the color-coded button on the remote corresponding to the AUTOnPALnSECAMnNTSC3.58nNTSC4.43 menu you want. The menu page appears on the screen after several * The BBE is manufactured by Sony Corporation under license from BBE seconds. Sound, Inc. It is covered by U.S. Patent No. 4,638,258 and No. 4,482,866.
  • Page 15 How to use the Changing the A/V SOUND SOUND MODE SURROUND FAVORITE MODE SURROUND FAVORITE menu CONTROL setting PIC MODE MENU PIC MODE MENU MENU MENU + / – /ENTER ENTER ENTER + / – /ENTER You can use the buttons on the remote The A/V CONTROL menu allows you and on the TV as well to display the to change the picture and sound...
  • Page 16 Changing the SET Changing the A/V CONTROL setting (continued) UP setting Adjusting the ADJUST options under PICTURE MODE Number buttons Press + or – to select the The SET UP menu allows you to change ENTER desired item (e.g., COLOR), the menu language, lock channels, -/-- then press ENTER.
  • Page 17 Changing other SET UP menu options Changing the SET UP setting (continued) Using the CHILD LOCK feature Press MENU. You can prevent your children from watching certain programs by using the CHILD LOCK feature. Press + or – to select the ENTER SET UP icon ( ), then...

  • Page 18: Changing The Channel Preset

    Changing the Channel Preset SOUND MODE SURROUND FAVORITE Select the desired (CH PRESET) PIC MODE MENU channel. MENU ENTER + / – /ENTER (1) Press + or – to select ENTER setting either VHF LOW, VHF HIGH or UHF, then press ENTER.
  • Page 19 Changing other CH PRESET menu options Changing the Channel Preset (CH PRESET) setting (continued) If you are not satisfied Press MENU. with the picture and sound quality, you may improve them by using Press + or – to select the fine tuning.

  • Page 20: Self Diagnosis Function

    • If the sound of some channels are noisy, Noisy sound select the channel, then display the CH Inform your nearest Sony service center about the number of times the PRESET menu and select the u indicator flashes. appropriate TV system (TV SYS).
  • Page 21 • The antenna direction is • Adjust the antenna direction. Contact a inappropriate. Sony dealer for advice. • Contact your nearest Sony service • Your TV may need service. indicator on your center. TV flashes red a number •...

  • Page 22: Identifying Parts And Controls

    Identifying parts and controls Remote Control Refer to the pages indicated in parentheses ( ) for details. !¶ Front panel -/-- -/-- !£ !¢ !∞ SOUND SOUND MODE SURROUND FAVORITE MODE SURROUND FAVORITE !§ MENU PIC MODE MENU PIC MODE ENTER ENTER !º...

  • Page 23: Disassembly

    SECTION 2 DISASSEMBLY 2-1. REAR COVER REMOVAL 2-3. F BRACKET REMOVAL 2 Rear cover 2 Two screws (+BVTP 3 × 12) 3 F bracket 5 Two claws 4 Two screws (+BVTP 3 × 12) 6 F board 1 Three screws 1 Three connectors (+BVTP 4 ×...

  • Page 24: Replacement Of Parts

    2-5. REPLACEMENT OF PARTS 2-6. TERMINAL BRACKET REMOVAL For replacement of the Control Button and Light Guide, unscrew them, exchange with the new parts, and fix them with screws (+BVTP) respectively. 2-5-1. REPLACEMENT OF CONTROL BUTTON 1 Two screws (+BVTP 3 × 12) Control button 2 One screw (+BVTP 4 ×...

  • Page 25: H3 Board Removal

    2-8. H3 BOARD REMOVAL 2-10. PICTURE TUBE REMOVAL 6 One screw (+BVTP 3 x 12) 3 Two connectors !∞ Four DGC clips !¶ Demagnetic coil 2 Four connectors !¢ Four claws 5 H3 Board !º Chassis assy 2 Two screws (+BVTP 3 ×...
  • Page 26 •REMOVAL OF ANODE-CAP NOTE : After removing the anode, short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon paint on the CRT. •REMOVING PROCEDURES 1 Turn up one side of the rubber cap in the direction indicated by the arrow a. 2 Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow b.

  • Page 27: Set-Up Adjustments

    KV-XF25M81 SECTION 3 RM-954 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 28: Convergence

    KV-XF25M81 RM-954 3-2. CONVERGENCE Preparation : • Before starting this adjustment, adjust the focus, horizontal size Purity and vertical size. • Minimize the brightness setting. BMC (Hexapole) • Provide dot pattern. Purity (1) Horizontal and Vertical Static Convergence Center dot DY pocket V.
  • Page 29 KV-XF25M81 RM-954 Blue BMC (Hexapole) Magnet. Neck assy Neck assy If the red, green and blue dots are not balanced or aligned, then use the BMC magnet to adjust in the manner described below. Blue VM1 board VM1 board Note 1.

  • Page 30: Focus Adjustment

    KV-XF25M81 RM-954 Rotate TLV-2 VOL (29”, 34”) on DY 3-3. FOCUS ADJUSTMENT Rotate TLV VOL (25”) on DY Adjust FOCUS control on the flyback transformer for the best XCV Rotate XCV Adj core on DY focus. YCH Rotate YCH VOL on DY...

  • Page 31: G2 (Screen) And White Balance Adjustments

    KV-XF25M81 RM-954 2. WHITE BALANCE ADJUSTMENT 3-4. G2 (SCREEN) AND WHITE BALANCE 1) Set to Service Mode (Refer Section 4-1: ADJUSTMENTS ADJUSTMENTS WITH COMMANDER). 1. G2 (SCREEN) ADJUSTMENT 2) Input white raster signal. 1) Set the PICTURE to normal. 3) Set the PICTURE to minimum.

  • Page 32: Circuit Adjustment

    KV-XF25M81 SECTION 4 RM-954 CIRCUIT ADJUSTMENTS 4-1. ADJUSTMENTS WITH COMMANDER Service adjustments are made with the RM-954 that comes with 1, 4 this unit. Select the adjustment item. ↓ a. ENTERING SERVICE MODE 3, 6 Raise/lower the data value. With the unit on standby ↓...

  • Page 33: Adjustment Method

    KV-XF25M81 RM-954 4-2. ADJUSTMENT METHOD Item Number 00 of device GEO Use the same method for all Items. Use 1 and 4 to select the This explanation uses H-Position as an example. 1. Select “GEO 00 HPS” with the 1 and 4 buttons.
  • Page 34 Adjustment Item Table Device Functionality Note Data Range Function Note for Register Slava RAM Address Name Name Different Data No. (bit) Address (bit) H Position 50/60HZ 12 (7-2) CXA2130S(88H) 96 (7-2) H Size 50/60HZ 11 (7-2) 95 (7-2) Pin Amp 50/60HZ 13 (7-2) 97 (7-2)
  • Page 35 Adjustment Item Table Device Functionality Note Data Range Function Note for Register Slava RAM Address Name Name Different Data No. (bit) Address (bit) H Drive Pulse Width Switch 00 (6) 54 (6) AFC Gain Control TV/Video/Text 0F (1-0) A1 (1-0) H Oscillation 0C (7-4) 60 (7-4)
  • Page 36 Adjustment Item Table Device Functionality Note Data Range Function Note for Register Slava RAM Address Name Name Different Data No. (bit) Address (bit) SECAM BELL f0 1C (7-2) CXA2060AS(8AH) 85 (7-2) H Oscillation 0C (7-4) 80 (7-4) Sub Hue Control TV/Video 05 (7-2) Sub Color Control...
  • Page 37 KV-XF25M81 RM-954 ITEM INFORMATION. No. OPB0 OP1 Item XTAL 4.43 XTAL 3.58 SECAM 2nd. Lang KV-XF25M81 No. OPB1 OP2 Item NICAM HDEV Thai Bil – DVD input AV Input KV-XF25M81 No. OPB2 OP3 Item – 2199 Curve Auto PIC Auto TV sys...

  • Page 38: Picture Quality Adjustments

    KV-XF25M81 RM-954 4-3. PICTURE QUALITY ADJUSTMENTS BELL FILTER ADJUSTMENT SUB COLOR ADJUSTMENT 1. Input SECAM color-bar signal. 2. Connect the dual-trace oscilloscope to the pin 9 (R-Y) of 1. Input a PAL color-bar. CN303 (not mounted). 2. Set to the following condition: 3.

  • Page 39: Picture Distortion Adjustment

    KV-XF25M81 RM-954 4-5. PICTURE DISTORTION ADJUSTMENT (1) PICTURE DISTORTION ADJUSTMENT (2) Item Number 00 – 0B H-TRAPEZOID (Rotate RV1801) GEO 0 HSH (H POSITION) GEO 1 HSZ (H SIZE) GEO 2 PAP (PIN AMP) GEO 3 TILT (TRAPEZIUM) GEO 4...
  • Page 40 KV-XF25M81 RM-954 MEMO ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○...

  • Page 41: Diagrams

    KV-XF25M81 KV-XF25M81 KV-XF25M81 SECTION 5 RM-954 RM-954 RM-954 DIAGRAM 5-1. BLOCK DIAGRAM MAIN. TUVIF TRU Surround AUDIO PROCESSOR L1 out AV SW TV V in TU101 IC3201 IC3206 IC3207 TDA7315D R1 out BTF-LG433 TV L in IC1401 NJM2187L NJM2150D <slave:80H>...

  • Page 42: Circuit Boards Location

    KV-XF25M81 KV-XF25M81 RM-954 RM-954 5-3. CIRCUIT BOARDS LOCATION 5-4. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS Note: Reference information • All capacitors are in µF unless otherwise noted. RESISTOR : RN METAL FILM • All electrolytic capacitors are rated at 50V unless otherwise noted.

  • Page 43: Semiconductors

    KV-XF25M81 KV-XF25M81 RM-954 RM-954 5-5. SEMICONDUCTORS DIODE TRANSISTOR AK04V0 FMU-G26S\ 5P6M DTC114EK RF614 CXA1315P (16PIN) AU-01Z-V1 DTC114EKA-T146 CXA1855S (48PIN) EL1Z UN2111 CXA2130S (64PIN) ERA22-08 UN2211 CXP86461-609S (64PIN) GP08D UN2213 NJM2150D (20PIN) HSS83TD 2SA1162-G NJM2187L (30PIN) RD33EB3T 2SC1623-L5L6 SAA5261 (52PIN) RGP02-17EL-6433...
  • Page 44 KV-XF25M81 RM-954 TA8200AH TDA8172 LA6510 STR-F6656 MARKING SIDE VIEW Zig-zag In -line Package Pin 6~99 RU-1P MARKING SIDE VIEW – 77 –...

  • Page 45: Exploded Views

    KV-XF25M81 SECTION 6 RM-954 EXPLODED VIEWS NOTE: • • Items marked " ∗ " are not stocked since Items with no part number and no The components identified by description are not stocked because they are seldom required for routine...

  • Page 46: Chassis

    KV-XF25M81 RM-954 6-2. CHASSIS SCREW BVTP 3 × 12 r: 7-685-648-71 REF. NO. PART NO. DESCRIPTION REMARK * A-1372-576-A H3 BOARD, MOUNTED * A-1135-985-A B3 BOARD, COMPLETE 4-022-115-12 HOLDER, AC CORD ! 1-574-062-27 CORD, POWER (WITH CONNECTOR) 2.5A/250V 4-066-684-21 BRACKET, TERMINAL...

  • Page 47: Picture Tube

    KV-XF25M81 RM-954 6-3. PICTURE TUBE SCREW BVTP 3 × 12 r: 7-685-648-71 REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK X-4036-294-4 BEZNET ASSY 102-104, 109 * 4-045-290-11 CUSHION (50X290), DGC 4-036-405-11 SPRING, COMPRESSION * 4-065-572-01 CLIP (25RSN), DGC...

  • Page 48: Electrical Parts List

    KV-XF25M81 SECTION 7 RM-954 The components identified by shading and mark ! are critical for safety. ELECTRICAL PARTS LIST Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK NOTE: • Items marked " ∗ " are not stocked since they •...
  • Page 49 KV-XF25M81 RM-954 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 C532 1-126-941-11 ELECT 470MF C626 1-102-002-00 CERAMIC 680PF...
  • Page 50 KV-XF25M81 RM-954 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 <DIODE> D622 8-719-071-39 DIODE FMU-G26S D623 8-719-978-65 DIODE DTZ-TT11-15B...
  • Page 51 KV-XF25M81 RM-954 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 JR008 1-216-295-91 SHORT Q307 8-729-230-49 TRANSISTOR 2SC2712-YG JR010...
  • Page 52 KV-XF25M81 RM-954 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 R045 1-414-233-22 INDUCTOR CHIP 0UH R347 1-216-051-00 RES,CHIP 1.2K...
  • Page 53 KV-XF25M81 RM-954 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 R545 1-216-077-00 RES,CHIP 1/10W R626 1-216-049-91 RES,CHIP 1/10W...
  • Page 54 KV-XF25M81 RM-954 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 <TUNER> C1436 1-163-038-91 CERAMIC CHIP 0.1MF C1440 1-163-133-00...
  • Page 55 KV-XF25M81 RM-954 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 C3257 1-164-346-11 CERAMIC CHIP CN6200* 1-564-507-11 PLUG, CONNECTOR 4P...
  • Page 56 KV-XF25M81 RM-954 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 JR3208 1-216-295-91 SHORT R1451 1-216-073-00 RES,CHIP 1/10W JR3209...
  • Page 57 KV-XF25M81 RM-954 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 R3217 1-216-073-00 RES,CHIP 1/10W R3278 1-216-067-00 RES,CHIP 5.6K...
  • Page 58 KV-XF25M81 RM-954 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 C713 1-102-228-00 CERAMIC 470PF 500V <TRANSISTOR> C716 1-128-526-11...
  • Page 59 KV-XF25M81 RM-954 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 * A-1241-346-A F BOARD, MOUNTED <CONNECTOR> ******************** CN3601* 1-580-844-11...
  • Page 60 KV-XF25M81 RM-954 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 R3917 1-247-804-11 CARBON 1/4W D806 8-719-988-61 DIODE 1SS355TE-17...
  • Page 61 KV-XF25M81 RM-954 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 R829 1-216-025-91 RES,CHIP 1/10W C5908 1-106-383-00 MYLAR 0.047MF...
  • Page 62 KV-XF25M81 RM-954 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 R5911 1-249-439-11 CARBON 1/4W ACCESSORIES AND PACKING MATERIALS...
  • Page 63 Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK Sony Corporation English 99DM70180-1 SONY TV Industries (M) Sdn. Bhd. Printed in Malaysia 9-965-742-01 © TV Business of General Area 1999. 4 – 96 –...

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