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Sony Trinitron KV-21FT250 Service Manual
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Sony Trinitron KV-21FT250 Service Manual

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HISTORY INFORMATION FOR THE FOLLOWING MANUAL:

SERVICE MANUAL

MODEL NAME
KV-21FT250
ORIGINAL MANUAL ISSUE DATE: 8/2007
:UPDATED ITEM
REVISION DATE
8/2007
5/2008
9-883-762-02
REMOTE COMMANDER
RM-YA005
LATIN NORTH
SUBJECT
No revisions or updates are applicable at this time.
Added new PN for IC IC001. New PN includes software data. Replaced pg. 60.
BX-1S
DESTINATION
CHASSIS NO.
SCC-S85A-A
®
TRINITRON
COLOR TELEVISION
CHASSIS

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Summary of Contents for Sony Trinitron KV-21FT250

  • Page 1: Service Manual

    HISTORY INFORMATION FOR THE FOLLOWING MANUAL: BX-1S SERVICE MANUAL CHASSIS MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO. KV-21FT250 RM-YA005 LATIN NORTH SCC-S85A-A ORIGINAL MANUAL ISSUE DATE: 8/2007 :UPDATED ITEM REVISION DATE SUBJECT 8/2007 No revisions or updates are applicable at this time. 5/2008 Added new PN for IC IC001.
  • Page 2 Self Diagnosis Supported model BX-1S SERVICE MANUAL CHASSIS MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO. KV-21FT250 RM-YA005 LATIN NORTH SCC-S85A-A KV-21FT250 RM-YA005 ® TRINITRON COLOR TELEVISION 9-883-762-02...

  • Page 3: Table Of Contents

    KV-21FT250 TABLE OF CONTENTS SECTION TITLE PAGE SECTION TITLE PAGE Specifi cations ................. 4 SECTION 4: CIRCUIT ADJUSTMENTS ..........24 Warnings and Cautions ..............5 4-1. Remote Adjustment Buttons and Indicators ......24 Safety Check-Out ................6 4-2. Accessing the Service Menu Mode ........25 Self-Diagnostic Function ..............

  • Page 4: Specifi Cations

    Supplied Accessories Remote Commander RM-YA005 Two Size AA (R6) Batteries Trademarks and Copyrights As an ENERGY STAR® Partner, Sony Corporation has determined that this product meets the ENERGY STAR® guidelines for energy efficiency. ENERGY STAR® is a U.S. registered mark.

  • Page 5: Warnings And Cautions

    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 identifi ed in this manual. Follow these procedures whenever critical components are replaced or improper operation is suspected.

  • Page 6: Safety Check-Out

    KV-21FT250 SAFETY CHECK-OUT The AC leakage from any exposed metal part to earth ground and from After correcting the original service problem, perform the following all exposed metal parts to any exposed metal part having a return to safety checks before releasing the set to the customer: chassis, must not exceed 0.5 mA (500 microamperes).

  • Page 7: Self-Diagnostic Function

    KV-21FT250 Self Diagnosis SELF-DIAGNOSTIC FUNCTION Supported model The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED indicator will automatically begin to fl ash. The number of times the LED fl ashes translates to a probable source of the problem. A defi nition of the STANDBY LED fl ash indicators is listed in the instruction manual for the user’s knowledge and reference.
  • Page 8 KV-21FT250 To Bring Up Screen Test In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below: DISPLAY POWER Sound Volume - Channel 5 Note that this differs from entering the Service Mode (Sound Volume + ). The following screen will be displayed indicating the error count: SELF DIAGNOSTIC VSTOP...

  • Page 9: Section 1: Disassembly

    KV-21FT250 SECTION 1: DISASSEMBLY 1-1. REAR COVER REMOVAL Remove 8 screws from Rear Cover. (+BVTP 4 X 16 TYPE2 IT-3) Remove 1 screw from terminal bracket on Rear Cover. (+BVTP 4 X 16 TYPE2 IT-3) Slide to remove Rear Cover from Beznet. Rear cover 9 screws 1 screw...

  • Page 10: Chassis Assembly Removal

    KV-21FT250 1-3. CHASSIS ASSEMBLY REMOVAL Remove AC cord from holder on bottom cover. Disconnect H3 Board connector from CN005 on the A Board. Release claw and slide out A Board. Disconnect speaker wire from CN200 on the A Board. Slide to move A Board 1-4.

  • Page 11: Picture Tube Removal

    KV-21FT250 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.

  • Page 12: Section 2: Wire Dressing

    KV-21FT250 SECTION 2: WIRE DRESSING 2-1. H3 BOARD CAUTION POINT 2-2. A BOARD UL WIRE DRESSING Dress UL Wire (1-923-082-52) according to Figure 1(b) as Connector Assy, shown 3P P/N: 1-910-031-76 Note : Ensure UL wire does not touch high temperature resistors R828, R829 &...

  • Page 13: C Board

    KV-21FT250 2-4. C BOARD Dress Conn Assy, 7P (RGB) with Make sure Conn Assy, 7P (RGB) Cable Tie at alignment hole, A as shown. does not direct contact with heat sink of IC751 CAUTION: Conn Assy, 7P Prevent tie, cable from touching (RGB) rear cover or any enclosures by turning them away from it...

  • Page 14: A Board (Continued)

    KV-21FT250 2-6. A BOARD (CONTINUED) Non-Rotational Coil Models Rotational Coil Models Dress Conn Assy, 7P, UL Wire (1-923-000-81) and Lead Assy, Dress Conn Assy, 7P, UL Wire (1-923-000-81), Lead Assy, with purse lock, Ø5 as shown. Earth and Rotational Coil Conn with purse lock, Ø5 as shown. Note : Keep Lead Assy, Earth away from heat sinks.

  • Page 15: Ac Power Cord And Speakers

    KV-21FT250 2-7. AC POWER CORD AND SPEAKERS 1) Dress AC Power Cord, Lead Assy, Earth and Lead Assy, Speaker (Right) inside standing purse lock. Note : Do not lock the standing purse lock. (will be lock after putting in DGC Conn in Overall Assy) Keep bunch of wires above of RY600 to avoid wires from being sandwiched with front jack and pushed against relay.

  • Page 16: Ac Power Cord And Speakers (Continued)

    KV-21FT250 2-8. AC POWER CORD AND SPEAKERS (CONTINUED) i) Ensure Tweeter's tab is facing inside (towards CRT).ii) Dress Lead Assy, Speaker (Right) underneath DGC. Note : Avoid wire being sandwich while docking rear (Sandwiched between DGC & CRT surface) iii) Dress DGC conn according to Figure. Spring Note : Kept DGC conn close to the CRT.

  • Page 17: Dy Wire Dressing

    KV-21FT250 2-9. DY WIRE DRESSING 1) Dress DY Conn along Conn Assy, 5P (200V) as shown. 2) Dress DY Conn and Conn Assy, 5P (200V) with Purse Lock Ø5. Note : Kept DY Conn & Conn Assy, 5P away from FBT area by a distance of 10mm or more. Earth Assy, Coating Purse Lock Ø5 Conn Assy, 5P...

  • Page 18: Fbt Wire Dressing

    KV-21FT250 2-10. FBT WIRE DRESSING Dress Earth Assy, Coating, Lead Assy, G2 & Focus with purse lock Purse Lock Ø5. as shown Safety Note : Keep Lead Assy, G2 away from HV Cable (min 1mm/kV) Operation Ensure Lead Assy, G2 is kept away from heat sinks Figure b (Focus) Conn.

  • Page 19: Hv Cap Assembly

    KV-21FT250 2-11. HV CAP ASSEMBLY 1) Dress HV cap assy with HV Holder as shown Safety Note: Make sure the specified position is being followed. Operation 2) Dress HV holder at DGC with purse lock, Ø9 as shown 3) Using Yellow line (CRT Carbon line) as a reference to dress purse lock, Ø9. Min.

  • Page 20: Section 3: Set-Up Adjustments

    KV-21FT250 SECTION 3: SET-UP ADJUSTMENTS The following adjustments should be made when a complete realignment Perform the adjustments in order as follows: is required or a new picture tube is installed. Beam Landing Convergence These adjustments should be performed with rated power supply voltage Focus unless otherwise noted.

  • Page 21: Convergence Adjustment

    KV-21FT250 3-2. CONVERGENCE ADJUSTMENT Horizontal Static Convergence Adjustment Before starting convergence adjustments: If the blue dot does not converge with the red and green dots, use the 6 pole magnet to adjust as shown: Perform FOCUS, VLIN and VSIZE adjustments. Set BRIGHTNESS control to minimum.

  • Page 22: Focus Adjustment

    KV-21FT250 Convergence Rough Adjustment Screen Corner Convergence Adjustment Before performing this adjustment, perform Horizontal and Vertical Static Affi x a Piece A (90), Convergence Correct/Permaloy Assy Correction to Convergence Adjustment. the misconverged areas. Input cross hatch pattern. a) TLH Adjust the horizontal convergence of red and blue dots by inserting a-d : screen-corner misconvergence TLH Correction Plate to the DY pocket (left or right).

  • Page 23: G2 (Screen) Adjustment

    KV-21FT250 3-4. G2 (SCREEN) ADJUSTMENT Before beginning adustment procedure: -Set Picture and Brightness to “STANDARD”. -Set TV to Video mode. -Set WHBL 016 “RGBB” to 01 Connect R, G, B of the C Board cathode to oscilloscope. Adjust Brightness to obtain the cathode value to the value shown below: 170 ±...

  • Page 24: Section 4: Circuit Adjustments

    KV-21FT250 SECTION 4: CIRCUIT ADJUSTMENTS Electrical Adjustments by Remote Commander Use the Remote Commander (RM-YA005) perform the circuit adjustments in this section. Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator 4-1. REMOTE ADJUSTMENT BUTTONS AND INDICATORS DISPLAY (Service Mode) MUTING...

  • Page 25: Accessing The Service Menu Mode

    KV-21FT250 4-2. ACCESSING THE SERVICE MENU MODE Use the remote commander to access the service meu mode and perform the following adjusments. Standby mode (Power off). Press the following buttons on the remote commander within a second of each other: DISPLAY POWER Sound Volume +...

  • Page 26: Confi Rming Service Adjustment Changes

    KV-21FT250 4-3. CONFIRMING SERVICE ADJUSTMENT Sub Color Adjustment CHANGES Set TV to Video mode. Set Picture mode to “CUSTOM”. After completing adjustments, pull out the plug from the AC outlet, then replace the plug in the AC outlet again. Input PAL 100% Color Bar (CB) to TV set (OTHER MODEL). Access Service Adjustment Mode.

  • Page 27: Sub Bright Adjustment

    KV-21FT250 11. Once adjustment is completed in Video mode, carry out adjustment Input PAL signal 50Hz in the Service Mode. in DVD mode. Set TV to DVD mode. Input NTSC 3.58 CB to DVD set Set Wide Mode to “OFF”. and perform steps 4 to 9 and 11.

  • Page 28: Service Data

    KV-21FT250 4-6. SERVICE DATA Initial Value Functionality Function Common (4:3) 50 (4:3) 60 (4:3) w50 (4:3) w60 Category Name HPOS Horizontal Shift (HS) GEOM HPAR Horizontal Parallelogram HBOW Horizontal Bow VLIN Vertical Linearity VSCR Vertical Scroll HSIZ EW Width (EW) EWPW EW Parabola/Width (PW) UCOP EW Upper Corner Parabola LCOP EW Lower Corner Parabola...
  • Page 29 KV-21FT250 Functionality Initial Value Function Col Temp Col Temp Col Temp Col Temp Col Temp Col Temp Common Category Name (Cool other) (Warm other) (Neutral other) (Cool YUV) (Warm YUV) (Neutral YUV) Black Level Offset R WHBL BKOR (OFB = 00), Offset B (OFB = 01) BKOG Black Level Offset G RDRV White Point R GDRV White Point G...
  • Page 30 KV-21FT250 Initial Value Functionality Function Col Temp 50pal 50pal Pic mode 0 Pic mode 1 Category Name (Neutral YUV) (TV) (Video) (VIVID) (STANDARD) Black Level Offset R (OFB = 00), WHBL BKOR Offset B (OFB = 01) BKOG Black Level Offset G RDRV White Point R GDRV White Point G BDRV White Point B...
  • Page 31 KV-21FT250 Functionality Initial Value Function 50pal(TV) 50pal(Video) Pic mode 0 Pic mode 1 Pic Mode 2 Video Category Name Black Level Offset R (OFB = 00), Offset B WHBL BKOR (OFB = 01) BKOG Black Level Offset G RDRV White Point R GDRV White Point G BDRV White Point B RGB Gain Preset...
  • Page 32 KV-21FT250 Functionality Initial Value Function Common 50pal(TV) 50pal(Video) 50secam(TV) 50secam(Video) Category Name SADJ PMAX Picture Maximum SHUE Sub-Hue SSHP Sub-Sharpness SSHO Sub-Sharpness Offset (Intelligent Pic) SCOL Sub-Color SCOO Sub-Color Offset (Intelligent Pic) Picture Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)] Color Control [GA:0~100(valid);...
  • Page 33 KV-21FT250 Functionality Initial Value Function 60ntsc(TV) 60ntsc(Video) 60palm(TV) 60palm(Video) 50YUV 60YUV Category Name SADJ PMAX Picture Maximum SHUE Sub-Hue SSHP Sub-Sharpness SSHO Sub-Sharpness Offset (Intelligent Pic) SCOL Sub-Color SCOO Sub-Color Offset (Intelligent Pic) Picture Control [GA:0~100(valid); >100(invalid), Others:0~63(valid); ignore bit 6(invalid)] Color Control [GA:0~100(valid);...
  • Page 34 KV-21FT250 Initial Value Functionality Function Pic mode 0 Pic mode 1 Pic Mode 2 Video TV Wide (4:3) Video Wide (4:3) Category Name SADJ PMAX Picture Maximum SHUE Sub-Hue SSHP Sub-Sharpness SSHO Sub-Sharpness Offset (Intelligent Pic) SCOL Sub-Color SCOO Sub-Color Offset (Intelligent Pic) Picture Control [GA:0~100(valid);...
  • Page 35 KV-21FT250 Initial Value Functionality Function Common Others PAL(TV) NTSC(TV) SECAM(TV) Category Name PFRQ Peaking Center Frequency and Delay Ratio Pre & Over Shoot Ratio of Positive & Negative Peaks YDLY Y-Delay CMAT PAL-SECAM or NTSC (Japan/USA) Matrix Automatic Color Limiting Chroma Bandpass Center Frequency SECAM Black Offset CHSE...
  • Page 36 KV-21FT250 Functionality Initial Value Function PAL(Video) NTSC(Video) SECAM(Video) S-INPUT SECAM NTSC Category Name PFRQ Peaking Center Frequency and Delay Ratio Pre & Over Shoot Ratio of Positive & Negative Peaks YDLY Y-Delay CMAT PAL-SECAM or NTSC (Japan/USA) Matrix Automatic Color Limiting Chroma Bandpass Center Frequency SECAM Black Offset CHSE...
  • Page 37 KV-21FT250 Initial Value Functionality Function Common (4:3) 50 (4:3) 60 Others Video Category Name Synchronization on YSYNC Input SYNC Phase 1 Time Constant Video Ident Mode Forced Slicing Level for Vertical Sync Slicing Level Sync Separator SVID Source Selection for Video Identification FORF Forced Field Frequency Macro Vision Keying Functionality...
  • Page 38 LNSD RF Amp SN Level Drop Threshold LNEX RF Amp check SN Drop Timing CHTR Channel Threshold after Auto Prg to set RF Amp User Mode TUSO Tuner sel [GA] 0:Alps, 1:Sony, 2:VA Alps, 3:Pana [NT] 0:other, 1:Sony LNA Initial Value Functionality...
  • Page 39 KV-21FT250 Functionality Initial Value Function Common Video Movie Sports Category Name BBE Contour SDSP BBE Process BBLW BBE Contour Offset SVOF Surround /Effect Mode Volume Offset Decoder Level Adjust Mono Level Adjust Nicam Level Adjust SAP Level Adjust ADC Level Adjust Incredible Mono/Stereo Effect Main Bass Offset Main Treble Offset...
  • Page 40 KV-21FT250 Initial Value Functionality Function Common Category Name SPTU Upper Threshold forSAP carrier detection SDEC SPTL Lower Threshold for SAP carrier detection SPTH Noise Threshold for automute of SAP SPHY Hysteresis size for automute of SAP FMTH Noise Threshold for automute of SC2 in FM A2 standard FMHY Hysteresis size for automute of SC2 in FM A2 standard NILE NICAM lower error limit (DDEP)
  • Page 41 KV-21FT250 Initial Value Functionality Function Common (4:3) 50 (4:3) 60 Others Category Name ASHT auto shut off timer (data * 5 min) OPTM OSDB OSD brightness OSDH OSD Horizontal Position OSDV OSD Vertical Position MUTE No Signal Mute Switch (1 = enabled) RFUL RF Signal Change Counter after Unlocked (Disable when 0fh) RFLK RF Signal Change Counter after Locked (Disable when 0fh) LANG OSD language shipping condition...
  • Page 42 KV-21FT250 Functionality Function Initial Value Common Others Category Name SOFF stay off (0: follow last memory with AC on, 1: standby with AC on) OPUS SPCH Channel Number after Shipping Condition SPCA Cable Selection after Shipping Condition (1 = Cable On) CCBR CC Brightness (only for US) CCHP CC H position (only for US) Offset Control on UV Input Signals (only for NTSC model)

  • Page 43: Section 5: Diagrams

    KV-21FT250 SECTION 5: DIAGRAMS 5-1. CIRCUIT BOARDS LOCATION C Board H3 Board A Board 5-2. PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM INFORMATION All capacitors are in μF unless otherwise noted. pF : μμF 50WV or less S : Measurement impossibillity. are not indicated except for electrolytics and tantalums.

  • Page 44: Block Diagram

    KV-21FT250 5-3. BLOCK DIAGRAM KV-21FT250...

  • Page 45: Schematics And Supporting Information

    KV-21FT250 5-4. SCHEMATICS AND SUPPORTING INFORMATION A BOARD SCHEMATIC DIAGRAM (1 OF 6) TO A BOARD CN905 A BOARD WAVEFORMS TO C BOARD CN701 CN007 CN004 — C005 C006 R377 1 . 5 k 2.5 Vp-p (V) 5.4 Vp-p (H) 3.2 Vp-p (H) D066 PG102R...

  • Page 46: A Board Schematic Diagram (2 Of 6)

    KV-21FT250 A BOARD SCHEMATIC DIAGRAM (2 OF 6) TO SPEAKERS J200 — CN200 — R238 R237 RN-CP RN-CP C234 470p C235 470p — C202 — C201 0 . 0 4 7 0 . 1 C217 R219 R200 R217 1000 8 . 2 k C214 1000 RN-CP...

  • Page 47: A Board Schematic Diagram (3 Of 6)

    KV-21FT250 A BOARD SCHEMATIC DIAGRAM (3 OF 6) — IC606 KIA78D33P1 3.3V REG C672 0 . 0 1 3 . 3 V C641 A 3/6 — 1.8V REG BA18BC0FP-E2 IC607 D635 PDZ3.6B-115 1.8V_MAIN JW1665 POWER SUPPLY C685 C662 0 . 1 —...

  • Page 48: A Board Schematic Diagram (4 Of 6)

    KV-21FT250 A BOARD SCHEMATIC DIAGRAM (4 OF 6) A BOARD WAVEFORMS R311 R312 D062 RN-CP MM3Z5V6ST1 R310 RN-CP IC804 — AN15524A RN-CP 3 . 3 V V-OUT C884 R309 R8019 R8020 470p R313 JR8001 150k R305 R307 1.40Vp-p 132.0Vp-p 660.0mVp-p R881 T801 1/10W...

  • Page 49: A Board Schematic Diagram (5 Of 6)

    KV-21FT250 A BOARD SCHEMATIC DIAGRAM (5 OF 6) — SWF100 SWF101 — C138 0 . 0 1 — JR1100 R106 TU101 8 . 2 k RN-CP L101 0.33uH — R108 C116 R128 4700p RN-CP CHIP R103 R119 C115 C111 C140 0 .

  • Page 50: A Board Schematic Diagram (6 Of 6)

    KV-21FT250 A BOARD SCHEMATIC DIAGRAM (6 OF 6) F O R J I G — CN904 JR1903 CHIP TU-AGC B_INT — B_DAT L902 47uH B_CLK R9028 C956 RN-CP R9030 R9031 RN-CP — RN-CP R902 R904 2 . 0 RN-CP RN-CP 1 .
  • Page 51 KV-21FT250 [AUDIO-VIDEO PROCESSOR, MICRO, AUDIO, POWER SUPPLY, DEFLECTION, TUNER, TERMINAL BLOCK] [AUDIO-VIDEO PROCESSOR, MICRO, AUDIO, POWER SUPPLY, DEFLECTION, TUNER, TERMINAL BLOCK] COMPONENT SIDE CONDUCTOR SIDE A BOARD LOCATOR LIST CONDUCTOR SIDE DIODE DIODE DIODE DIODE TRANSISTOR D002 D103 D605 D816 IC001 Q200 D003...

  • Page 52: C Board Schematic Diagram

    KV-21FT250 C BOARD SCHEMATIC DIAGRAM C BOARD WAVEFORMS — 2.400Vp-p 1.680Vp-p [CRT DRIVE, RGB DRIVE] J752 NTSC NTSC COMPONENT SIDE 2.160Vp-p 1.360Vp-p W700 — 1.760Vp-p 124.0Vp-p NTSC NTSC — R773 1/2W 560k C754 4 . 7 250V 2.200Vp-p 140.0Vp-p & R774 200V D750...

  • Page 53: H3 Board Schematic Diagram

    KV-21FT250 H3 BOARD SCHEMATIC DIAGRAM R5002 R5003 R5005 R5006 — R5007 R5001 1/4W 1/4W 1/4W 1/4W 1.5K CN5001 1/4W 1/4W TO A BOARD R5004 CN010 1/4W SOUND PROGRAM + MODE VIDEO IN PROGRAM - WEGA . VOL + GATE — VOL - S5006 S5002...

  • Page 54: Semiconductors

    KV-21FT250 5-5. SEMICONDUCTORS DIODE CATHODE ANODE ANODE ANODE (GRN) ANODE CATHODE CATHODE CATHODE (GRN) ANODE S3L20UF4 SPB-25MVWF D3SB60F3 1SS133T-77 BY228GPL-5402E3/72 10ERB20-TB3 MA111-TX DTZ5.6B 1PS226-115 HSS82-TJ PG102R 11EQS10-TB5 KDS114-RTK MA4300-H(TA) PG104R 1A5G MA2ZD14001S0 MA8036-H-TX PG156R MA8091-M MTZJ-T-77-15 RU4AM-T3 MTZJ-T-77-9.1A RD5.1ESB2 SB360-S RD5.6ESB2 10ERB20-TA2B5 TRANSISTOR...

  • Page 55: Section 6: Exploded Views

    7-685-648-79 SCREW +BVTP 3X12 TYPE2 IT-3 X-2178-828-1 BEZNET ASSY (21FT) [2-7] 4-046-600-11 SPACER, DY 2-580-654-01 SCREW, +PWTP2 4X16 4-046-161-31 EMBLEM, SONY NO.8 8-451-505-61 DY Y21RSA-S3 3-216-078-11 DOOR, CONTROL 4-057-714-01 PIECE ASSY, TLH CORRECTION 3-216-079-11 BUTTON, POWER A-1313-053-A A BOARD, COMPLETE...

  • Page 56: Section 7: Electrical Parts List

    KV-21FT250 SECTION 7: ELECTRICAL PARTS LIST NOTE: The components identifi ed by shading RESISTORS mark are critical for safety. Replace only • All resistors are in ohms with part number specifi ed. • F : nonfl ammable • All variable and adjustable resistors have characteristic curve B, unless otherwise noted.
  • Page 57 KV-21FT250 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES C089 1-162-964-11 CERAMIC CHIP 0.001μF 10% C216 1-126-965-91 ELECT 22μF C090...
  • Page 58 KV-21FT250 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES C626 1-102-228-00 CERAMIC 470pF 500V C835 1-162-970-11 CERAMIC CHIP 0.01μF C628 1-117-768-91...
  • Page 59 KV-21FT250 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES C919 1-164-346-11 CERAMIC CHIP 1μF D075 6-501-756-01 DIODE MAZ8091GMLS0 C922 1-164-315-11...
  • Page 60 KV-21FT250 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES D819 6-500-567-31 DIODE 10ERB20-TB3 IC200 6-706-985-01 AN17808A D820 8-719-083-20 DIODE PG102R...
  • Page 61 KV-21FT250 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES JR046 1-216-864-11 SHORT CHIP L042 1-469-555-21 INDUCTOR 10μH JR047 1-216-864-11 SHORT CHIP...
  • Page 62 KV-21FT250 REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES Q206 8-729-038-67 TRANSISTOR KRC102S R048 1-216-809-11 METAL CHIP 1/10W Q601 8-729-620-07 TRANSISTOR 2SC3052EF-T1-LEF R051 1-218-885-11 METAL CHIP 0.50% 1/10W R056 1-216-809-11 METAL CHIP 1/10W Q608 8-729-620-07 TRANSISTOR 2SC3052EF-T1-LEF R058 1-216-809-11...
  • Page 63 KV-21FT250 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R215 1-216-833-11 METAL CHIP 1/10W R384 1-216-809-11 METAL CHIP 1/10W R216 1-216-833-11...
  • Page 64 KV-21FT250 REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R820 1-216-825-11 METAL CHIP 2.2K 1/10W R888 1-218-887-11 METAL CHIP 0.50% 1/10W R821 1-216-837-11 METAL CHIP 1/10W R889 1-243-531-71 METAL OXIDE R890 1-215-910-00 METAL OXIDE R822 1-249-417-11 CARBON 1/4W R823...
  • Page 65 KV-21FT250 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R8017 1-216-853-11 METAL CHIP 470K 1/10W THERMISTOR R8018 1-216-828-11 METAL CHIP 3.9K...
  • Page 66 R5003 1-215-409-00 METAL 1/4W R5004 1-215-413-00 METAL 1/4W R5005 1-215-417-00 METAL 1/4W R5006 1-215-421-00 METAL 1/4W R5007 1-215-425-00 METAL 1.5K 1/4W Sony Corporation English Sony Technology Center 2007HJ74WEB-1 Printed in USA Technical Services 9-883-762-02 Service Promotion Department © 2007.8 KV-21FT250...
  • Page 67 CHASSIS In an effort to reduce the size of this pdf file the tiled schematics are not attached to this Service Manual. To receive a complete set of the tiled schematics for this manual please submit a request to: Service_Promotion@am.sony.com.

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