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Sony TRINITRON KV-XF25N90 Service Manual
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Sony TRINITRON KV-XF25N90 Service Manual

Sony TRINITRON KV-XF25N90 Service Manual

Sony trinitron color tv service manual
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SERVICE MANUAL

MODEL
COMMANDER DEST. CHASSIS NO.
KV-XF25N90
RM-914 Taiwan
KV-XF25N90
RM-914 Philippines SCC-U27C-A
MODEL
SCC-P13C-A
TRINITRON
Self Diagnosis
BG-3S
CHASSIS
COMMANDER DEST. CHASSIS NO.
COLOR TV
®
Supported model

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Summary of Contents for Sony TRINITRON KV-XF25N90

  • Page 1: Service Manual

    Self Diagnosis Supported model SERVICE MANUAL BG-3S CHASSIS MODEL COMMANDER DEST. CHASSIS NO. MODEL COMMANDER DEST. CHASSIS NO. KV-XF25N90 RM-914 Taiwan SCC-P13C-A KV-XF25N90 RM-914 Philippines SCC-U27C-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-XF25N90 RM-914 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-XF25N90 RM-914 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-XF25N90 RM-914 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-XF25N90 RM-914 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-XF25N90 RM-914 SELF-DIAGNOSTIC CIRCUIT IC301 IC001 IC003 Y/CHROMA JUNGLE SYSTEM MEMORY FROM IK-IN IO-8DAT B-DAT FROM [+B] Q604 C O-LED 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 VIDEO (the yellow jack) and the black plug to AUDIO-L (MONO) (the white jack). You can connect optional audio/video components, such as a VCR, multi disc player, •...

  • Page 10: Securing The Tv

    Presetting the Securing the TV channels MUTING DISPLAY POWER To prevent the TV from falling, secure the TV using one of the following methods: VIDEO manually Number buttons 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

    Watching the TV MUTING Additional tasks DISPLAY MUTING DISPLAY POWER POWER Do this This section explains functions used VIDEO VIDEO while watching TV. Most operations can Turn off temporarily Press POWER on the remote. The STANDBY indicator on the be done using the remote. TV lights up red.
  • Page 12 Advanced Operations Selecting the Watching the TV (continued) SOUND MODE SURROUND FAVORITE picture and sound SOUND MODE PIC MODE MENU Press + or – to select RETURN PIC MODE modes /LANGUAGE: WAKE UP RETURN then press RETURN. CH001 SLEEP You can select picture and sound modes CABLE NTSC3.58 The menu language changes to Chinese.

  • Page 13: Listening With Surround Sound

    Viewing your Listening with SOUND MODE SURROUND FAVORITE favorite channels surround sound MUTING DISPLAY POWER SURROUND PIC MODE MENU VIDEO WAKE UP RETURN You can display and select six of your The surround feature enables you to SLEEP favorite channels directly from your TV enjoy the sound effects of a concert hall Number buttons screen.

  • Page 14: Introducing The Menu System

    MONO Listen to monaural sound. * The BBE is manufactured by Sony Corporation under license from BBE Sound, Inc. It is covered by U.S. Patent No. 4,638,258 and No. 4,482,866. The word “BBE” and the BBE symbol are the trademarks of BBE Sound, Inc.
  • Page 15 How to use the Changing the A/V menu CONTROL setting SOUND SOUND MODE SURROUND FAVORITE MODE SURROUND FAVORITE PIC MODE MENU PIC MODE MENU MENU MENU RETURN RETURN WAKE UP WAKE UP You can use the buttons on the remote The A/V CONTROL menu allows you RETURN RETURN...
  • 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 RETURN desired item (e.g., change the menu language, lock COLOR), then press channels, adjust the picture COLOR...
  • Page 17 Changing the SET UP setting (continued) Changing other SET UP menu options Using the CHILD LOCK feature You can prevent your children from watching certain programs by Press MENU. using the CHILD LOCK feature. Press + or – to select the S E T U P RETURN Press MENU.

  • Page 18: Self Diagnosis Function

    OF F RETURN. Press POWER to turn off your TV. Inform your nearest Sony service center about the number of times the Press + or – to select ON or OFF, then press RETURN. STANDBY indicator flashes. (1) If you select “CABLE : ON”, you will receive cable TV program.

  • Page 19: Troubleshooting

    If you find any problem while viewing your TV, please check the following guide. If equipment near the TV. from cars, neon signs, hair any problem persists, contact your Sony dealer . dryers, power generators, • Adjust the antenna direction for etc.

  • Page 20: Identifying Parts And Controls

    “PIC ROTATION” so that the picture is affects your TV set. aligned to the TV screen. (page 23) The STANDBY indicator on • Contact your nearest Sony service • Your TV may need service. your TV flashes red for center.
  • Page 21 VIDEO !¡ Serial number: Follow the model number label of the TV set Manufacturer country: Malaysia Manufacturer: Sony TV Industries (M) Sdn Bhd Importer: Synlee Corporation Address: 2F, 372 Lin Sen North Road Taipei 10421 Taiwan !¶ Contact no for service and inquiries: !•...

  • Page 22: Disassembly

    SECTION 2 DISASSEMBLY 2-1. REAR COVER REMOVAL 2-3. F BRACKET REMOVAL 2 Rear cover 4 Two screws (+BVTP 3 × 12) 5 F bracket 2 Two claws 3 F board 3 Three screws (+BVTP 4 × 16) 1 Three connectors 1 Eight screws (+BVTP 4 ×...

  • Page 23: 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 Control button 1 Two screws (+BVTP 3 ×...

  • Page 24: A And B3 Boards Removal

    2-8. A AND B3 BOARDS REMOVAL 2-9. PICTURE TUBE REMOVAL !£ Four DGC clip 2 Three screws (+BVTAP 3 × 12) !∞ Demagnetic coil 1 Two screws (+BVTAP 3 × 12) !™ Four claws 8 Chassis assy 3 B3 Board !ª...
  • Page 25 • 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 26: Set-Up Adjustments

    KV-XF25N90 SECTION 3 RM-914 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 27: Convergence

    KV-XF25N90 RM-914 3-2. CONVERGENCE Preparation : • Before starting this adjustment, adjust the focus, horizontal size and vertical size. • Minimize the brightness setting. Purity • Provide dot pattern. BMC (Hexapole) (1) Horizontal and Vertical Static Convergence Purity Center dot V.
  • Page 28 KV-XF25N90 RM-914 BMC (Hexapole) Magnet. Blue 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 29: Focus Adjustment

    KV-XF25N90 RM-914 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 30: G2 (Screen) And White Balance Adjustments

    KV-XF25N90 RM-914 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 31: Circuit Adjustment

    KV-XF25N90 SECTION 4 RM-914 CIRCUIT ADJUSTMENTS 4-1. ADJUSTMENTS WITH COMMANDER Service adjustments are made with the RM-914 that comes with this unit. 1, 4 Select the adjustment item. ↓ a. ENTERING SERVICE MODE 3, 6 Raise/lower the data value. With the unit on standby ↓...

  • Page 32: Adjustment Method

    KV-XF25N90 RM-914 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 33 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 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 Drive Pulse Width Switch 00 (6) 54 (6) AFC Gain Control TV/Video 0F (1-0) A1 (1-0) H Oscillation 0C (7-4) 60 (7-4)
  • 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) SECAM BELL f0 1C (7-2) CXA2060AS(8AH) 85 (7-2) H Oscillation 0C (7-4) 80 (7-4) Sub Hue Control 05 (7-2) Sub Color Control 04 (7-2)
  • Page 36 KV-XF25N90 RM-914 ITEM INFORMATION. No. OPB0 OP1 XTAL 4.43 XTAL 3.58 SECAM 2nd. Lang Item KV-XF25N90 (Taiwan) KV-XF25N90 (Philippines) No. OPB1 OP2 Item NICAM HDEV Thai Bil – DVD input AV Input KV-XF25N90 (Taiwan) KV-XF25N90 (Philippines) No. OPB2 OP3 –...

  • Page 37: Picture Quality Adjustments

    KV-XF25N90 RM-914 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 38: Picture Distortion Adjustment

    KV-XF25N90 RM-914 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 39 KV-XF25N90 RM-914 MEMO ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○...
  • Page 40 KV-XF25N90 RM-914 MEMO ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○...

  • Page 41: Diagrams

    KV-XF25N90 KV-XF25N90 KV-XF25N90 SECTION 5 RM-914 RM-914 RM-914 DIAGRAM 5-1. BLOCK DIAGRAM MAIN. TUVIF TRU Surround AUDIO PROCESSOR L1 out TV V in AV SW TU101 IC3201 IC3206 IC3207 TDA7315D R1 out TV L in IC1401 BTF-WG411 NJM2187L NJM2150D <slave:80H>...

  • Page 42: Exploded Views

    KV-XF25N90 SECTION 6 RM-914 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 43: Chassis

    KV-XF25N90 RM-914 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 4-022-115-00 HOLDER, AC CORD ! 1-573-023-11 CORD, POWER (WITH CONNECTOR) 6A/250V 4-066-684-41 BRACKET, TERMINAL...

  • Page 44: Picture Tube

    KV-XF25N90 RM-914 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-4036-742-1 BEZNET ASSY (FOR TAIWAN) 1-451-475-11 DEFLECTION YOKE (Y25RSA) 102 - 104, 106 - 109 A-1331-877-A C BOARD, MOUNTED...

  • Page 45: Electrical Parts List

    KV-XF25N90 SECTION 7 RM-914 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 46 KV-XF25N90 RM-914 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 C530 1-137-372-11 FILM 0.022MF C620 1-163-133-00 CERAMIC CHIP...
  • Page 47 KV-XF25N90 RM-914 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 48 KV-XF25N90 RM-914 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 49 KV-XF25N90 RM-914 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 R038 1-216-049-91 RES,CHIP 1/10W R327 1-216-033-00 RES,CHIP 1/10W...
  • Page 50 KV-XF25N90 RM-914 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 R533 1-249-417-11 CARBON 1/4W R611 1-216-089-91 RES,CHIP 1/10W...
  • Page 51 KV-XF25N90 RM-914 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 T603 ! 1-431-946-11 TRANSFORMER, CONVERTER C1426 1-164-346-11 CERAMIC CHIP...
  • Page 52 KV-XF25N90 RM-914 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 C3249 1-164-505-11 CERAMIC CHIP 2.2MF C6244 1-164-161-11 CERAMIC CHIP 0.0022MF...
  • Page 53 KV-XF25N90 RM-914 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 <CHIP CONDUCTOR> R1435 1-216-022-00 RES,CHIP 1/10W R1436 1-216-025-91...
  • Page 54 KV-XF25N90 RM-914 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 R3205 1-216-069-00 RES,CHIP 6.8K 1/10W R3263 1-216-093-91 RES,CHIP...
  • Page 55 KV-XF25N90 RM-914 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-1331-877-A C BOARD, MOUNTED D1808 8-719-908-03 DIODE GP08D...
  • Page 56 KV-XF25N90 RM-914 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. C F H REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK R1808 1-249-425-11 CARBON 4.7K 1/4W...
  • Page 57 KV-XF25N90 RM-914 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> C5913 1-130-471-00 MYLAR 0.001MF C5914 1-126-933-11 ELECT...
  • Page 58 KV-XF25N90 RM-914 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 R5919 1-249-417-11 CARBON 1/4W F ACCESSORIES AND PACKING MATERIALS...
  • Page 59 Replace only with part number specified. REF. NO. PART NO. DESCRIPTION REMARK REF. NO. PART NO. DESCRIPTION REMARK Sony Corporation English 99DM70030-1 SONY TV Industries (M) Sdn. Bhd. Printed in Malaysia © 9-965-740-01 TV Business of General Area 1999. 4 – 92 –...

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