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Toshiba 26HL84 Service Manual

Lcd color television
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See also: Owner's Manual , Service Instructions
FILE NO. 020-200405
SERVICE MANUAL
LCD Color Television
26HL84
Jun. 2004 (YC/X)

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Summary of Contents for Toshiba 26HL84

  • Page 1 FILE NO. 020-200405 SERVICE MANUAL LCD Color Television 26HL84 Jun. 2004 (YC/X)

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SERVICE SAFETY PRECAUTIONS ............................ 3 HANDLING THE LCD MODULE ............................5 SERVICE MODE .................................. 7 TROUBLESHOOTING DIAGNOSIS FUNCTION ........................ 8 LOCATION OF CONTROLS .............................. 10 LAYOUT OF MAJOR BOARDS ............................12 MECHANICAL DISASSEMBLY ............................13 EXPLODED VIEW ................................26 PACKING DISASSEMBLY ..............................

  • Page 3: Service Safety Precautions

    SERVICE SAFETY PRECAUTIONS • The caution items shown here describe major safety issues and should always be observed. • The meanings of the various indications are as follows. Indicates a hypothetical situation in which service personnel and nearby third parties, or even WARNING end users due to a product defect after the service operation is completed, could possibly be in danger of injury or even death in the event of operational error.
  • Page 4 WARNING • Always advise users to keep children away. There is danger of injury to children from tools, disassembled products, etc. KEEP CHILDREN AWAY • Always disconnect the power plug before starting work whenever power is not required. Failure to disconnect the power plug before starting work can result in electrical shock. UNPULUG •...

  • Page 5: Handling The Lcd Module

    HANDLING THE LCD MODULE Safety Precautions 3. If the panel surface becomes soiled, wipe with cotton or a In the event that the screen is damaged or the liquid crystal soft cloth. If this does not remove the soiling, breathe on (fluid) leaks, do not breathe in or drink this fluid.
  • Page 6 7. Do not expose the LCD module to direct sunlight or strong ultraviolet rays for an extended period of time. 8. Do not store the LCD module below the temperature con- ditions described in the specifications. Failure to do so could result in freezing of the liquid crystal due to cold air or loss of resilience or other damage.

  • Page 7: Service Mode

    SERVICE MODE ENTERING TO SERVICE MODE 1) Press the "MUTE" button once on the remote control, "1/2 MUTE" is displayed on the screen. 2) Press the "MUTE" button again, "MUTE" is displayed on the screen. 3) Press the "MENU" button on the TV while pressing the "MUTE" button on the remote control, "S" may appear on the screen.

  • Page 8: Troubleshooting Diagnosis Function

    TROUBLESHOOTING DIAGNOSIS FUNCTION DIAGNOSIS FUNCTION FOR LED INDICATION CAUSE Short-circuit detection of BUS line LED is lit in 1 second at intervals of 1 second. BUS line may possibly be short-circuit (SDA to SCL), or BUS line (SDA, SCL) is grounded. Overcurrent limiter detection LED is lit in 0.5 at intervals of 0.5 second.
  • Page 9 SELF DIAGNOSIS FUNCTION 1) Press "9" button on the remote control during display of adjustment menu in the service mode. 2) During diagnosis, the following displays are shown. <SELF CHECK> Part number of microprocessor Operation number of protecting circuit ------"00" is normal. When indication is other than "00", overcurrent is apt to flow, and circuit parts may possibly be dam- aged.

  • Page 10: Location Of Controls

    LOCATION OF CONTROLS Control panel Swivel base Side Front Terminals (VIDEO 3) POWER POWER Headphone jack Power indicator Remote sensor Terminals • VIDEO/AUDIO OUT • VARIABLE AUDIO OUT Back Push Remove the covers Cable clamper (Supplied: see page 8) DVI/HDCP IN Antenna terminals Terminals •...

  • Page 11: Learning About The Remote Control

    Learning about the remote control The buttons used for operating the TV only are described here. For a complete list of the remote control’s functions, see the “Remote Control functional key chart” on pages 19–20. turns the TV on and off POWER allows access to the automatic TV shut-off function (page 53) SLEEP...

  • Page 12: Layout Of Major Boards

    LAYOUT OF MAJOR BOARDS U800 POWER MODULE UNIT U902A TN/AOUT Board U903 SCALER Board U901E KEY SW Board U901C AV2 Board U901D POWER SW Board U901G D-REWRITE Board U901A SIGNAL Board U901B FRONT/AV Board U901F LED/RMT Board – 12 –...

  • Page 13: Mechanical Disassembly

    MECHANICAL DISASSEMBLY • Note: Be sure to lay down the main body (by placing its screen downward) for disassembly. Removing the back cover 1) Remove the BC stand cover. 2) Remove the BC terminal cover. 3) Remove 6 screws, then remove the stand. BC Stand Cover Stand BC Terminal Cover...
  • Page 14 4) Remove 11 screws (PBI 4x12). 5) Remove 5 screws (PP 3x6). 6) Remove the back cover. PP 3x6 PBI 4x12 PP 3x8 PP 3x8 Back Cover – 14 –...

  • Page 15: Removing The Speakers

    Removing the speakers 1) Remove the back cover. (Refer to Item 1.) 2) Disconnect the speaker wire harness on the Front/AV board. 3) Remove the wire harness of the 3 wire holders. 4) Remove 4 screws, then remove the left speaker and wire holder. 5) Remove 4 screws, then remove the right speaker and wire holder.
  • Page 16 Removing the top shield bracket 1) Remove the back cover. (Refer to Item 1.) 2) Remove 5 screws, then remove the top shield bracket. Top Shield Braket STP 3x8 STP 3x8 – 16 –...
  • Page 17 Removing the Power Module unit 1) Remove the back cover. (Refer to Item 1.) 2) Disconnect the power cord from the connector. 3) Remove the 3 wire harnesses from the 3 wire clampers on the plate back R. 4) Disconnect the 8 wire harnesses from the 8 connectors on the Power Module unit. 5) Remove 7 screws, then remove the Power Module unit.
  • Page 18 Removing the Scaler board 1) Remove the back cover. (Refer to Item 1.) 2) Remove the top shield bracket. (Refer to Item 3.) 3) Remove 4 screws (STP3x6) and 2 screws (STP3x5), then remove the top shield RM. 4) Disconnect the 8 wire harnesses and 2 FFC from the Scaler board. 5) Remove 4 screws (STP3x5), then remove the Scaler board and bottom shield RM.
  • Page 19 Removing the D-Rewrite board 1) Remove the back cover. (Refer to Item 1.) 2) Remove the top shield bracket. (Refer to Item 3.) 3) Remove the Scaler board. (Refer to Item 5.) 4) Remove 2 screws, then remove the D-Rewrite board. 5) Disconnect the 2 wire harnesses and 1 FFC on the D-Rewrite board.
  • Page 20 Removing the back terminal plate, back bottom plate and back R plate 1) Remove the back cover. (Refer to Item 1.) 2) Remove the top shield bracket. (Refer to Item 3.) 3) Remove the Scaler board. (Refer to Item 5.) 4) Remove the D-Rewrite board.
  • Page 21 Removing the TN/AOUT, AV2 and Signal boards 1) Remove the back cover. (Refer to Item 1.) 2) Remove the top shield bracket. (Refer to Item 3.) 3) Remove the Scaler board. (Refer to Item 5.) 4) Remove the D-Rewrite board. (Refer to Item 6.) 5) Remove the back plates.
  • Page 22 Removing the Front /AV board 1) Remove the back cover. (Refer to Item 1.) 2) Remove 1 screw (BIDT2 3x10 BZ). 3) Remove 2 screws (PP 3x6), then remove the front AV panel. 4) Remove 1 screw (BIDT2 3x10 BZ) and 1 screw (PP 3x6), then remove the rear AV panel. 5) Disconnect the 2 wire harnesses and 1 FFC from the Front/AV board.
  • Page 23 10. Removing the Power SW and LED/RMT boards 1) Remove the back cover. (Refer to Item 1.) 2) Remove 3 screws (STP 3x8), then remove the LED/RMT board. 3) Disconnect the 2 wire harnesses from the connector on the LED/RMT board. 4) Remove 2 screws (STP 3x8), then remove the switch cover and cap.
  • Page 24 11. Removing the chassis frame 1) Remove the back cover. (Refer to Item 1.) 2) Remove the speakers. (Refer to Item 2.) 3) Remove the top shield bracket. (Refer to Item 3.) 4) Remove Power Module unit. (Refer to Item 4.) 5) Remove the Scaler board.
  • Page 25 12. Removing the LCD and front bezel cover assembly 1) Remove the back cover. (Refer to Item 1.) 2) Remove the speakers. (Refer to Item 2.) 3) Remove the top shield bracket. (Refer to Item 3.) 4) Remove Power Module unit. (Refer to Item 4.) 5) Remove the Scaler board.

  • Page 26: Exploded View

    EXPLODED VIEWS 1. Cover Block A402 A227 PP 5x12 A406 PP 3x8 PBI 4x12 PP 3x8 PP 3x8 PBI 4x12 A401 LOCATION No. Parts No. Description A227 23429049 CABINET, STAND A401 23532669 COVER, BACK COVER A402 23532633 COVER, BC STAND COVER A406 23532634 COVER, BC TERMINAL COVER...
  • Page 27 2. Chassis Block 1 ZA04 PP 3x6 PP 3x6 PP 3x6 A218 UF01 ZA04 MJ18 STP 3x8 MJ13 PP 3x20 STP 3x8 MJ94 ZA01 STP 3x8 P801 U903 PP 3x6 PP 3x6 A218 UF01 U800 PP 3x20 PP 3x6 MV23 PP 3x6 A221 U901B...
  • Page 28 3. Chassis Block 2 STP 3x8 STP 3x8 STP 3x8 STP 3x8 H003A E003 MJ15 STP 3x8 U901G BIDT2 U901C 3 x10 BZ U901A PP 3x6 STP 3x8 U902 A224 STP 3x8 H003 BIDT2 3x10 BZ BIDT2 3x10 BZ LOCATION No. Parts No.
  • Page 29 4. LCD and Front Bezel Block PBI 4x12 PP 4x10 PP 4x10 PP 3x6 PBI 4x12 A219 B001 PP 4x10 PBI 4x12 BIDT2 3x10 A202 BIDT2 3x10 BIDT2 3x10 U901E W661 U901D BIDT2 A203 3x10 BIDT2 A215 3x10 BIDT2 3x10 BIDT2 W661 3x10...

  • Page 30: Packing Disassembly

    A703 Y170 Y109 A701A LOCATION No. Parts No. Description A701A 23067704 CARTON, CASE 26HL84 A702A 23946777 PACKING, TOP PACKING 26HL84 A702B 23946778 PACKING, BOTTOM PACKING 26HL84 A703 23945143 BAG, PROTECTIVE, 35P2700 K902 23306504 REMOCON HAND UNIT IR, CTVUSA K903 23306465...

  • Page 31: Chassis And Cabinet Replacement Parts List

    · · · · · The part number must be used when ordering parts, in order to assist in processing, be sure to include the Model number and Description. · · · · · The PC board assembly with mark is no longer available after the end of the production. Model : 26HL84 Capacitors ..... CD : Ceramic Disk PF : Plastic Film EL : Electrolytic Resistors ....
  • Page 32 Location Parts No. Description Location Parts No. Description CC01 24109102 CERAMIC CHIP, 50V B 1000PF K CS05 24092538 CERAMIC CHIP, 10V F 1UF Z CC02 24109102 CERAMIC CHIP, 50V B 1000PF K CS06 24092538 CERAMIC CHIP, 10V F 1UF Z CC03 24109102 CERAMIC CHIP, 50V B 1000PF K CS07...
  • Page 33 Location Parts No. Description Location Parts No. Description CV250 24092441 CERAMIC CHIP, 16V F 1UF Z R612 24011273 CHIP, 1/20W 27K OHM J CV251 24092441 CERAMIC CHIP, 16V F 1UF Z R613 24011124 CHIP, 1/20W 120K OHM J CV252 24109103 CERAMIC CHIP, 50V B 0.01UF K R614 24011103 CHIP, METAL FILM, 1/20W 10K OHM J CV253...
  • Page 34 Location Parts No. Description Location Parts No. Description RB66 24011473 CHIP, METAL FILM, 1/20W 47K OHM J RD240 24011101 CHIP, METAL FILM, 1/20W 100 OHM J RB67 24011221 CHIP, METAL FILM, 1/20W 220 OHM J RD248 24011473 CHIP, METAL FILM, 1/20W 47K OHM J RB69 24011272 CHIP, 1/20W 2.7K OHM J RD249...
  • Page 35 Location Parts No. Description Location Parts No. Description RS103 24011103 CHIP, METAL FILM, 1/20W 10K OHM J RV259 24011102 CHIP, METAL FILM, 1/20W 1K OHM J RS112 24011473 CHIP, METAL FILM, 1/20W 47K OHM J RV260 24011101 CHIP, METAL FILM, 1/20W 100 OHM J RS116 24011473 CHIP, METAL FILM, 1/20W 47K OHM J RV261...
  • Page 36 Location Parts No. Description Location Parts No. Description RY548 24011102 CHIP, METAL FILM, 1/20W 1K OHM J L640 23289109 COIL, PEAKING, TRF41R0AF RY550 24011332 CHIP, METAL FILM, 1/20W 3.3K OHM J L645 23103238 INDUCTOR, BEAD, TEM2142AD RY551 24011182 CHIP, METAL FILM, 1/20W 1.8K OHM J L655 23103233 INDUCTOR, BEAD, TEM2137AD RY552...
  • Page 37 Location Parts No. Description Location Parts No. Description QS10 23904896 IC, JLC1562BF DB76 23316231 DIODE, 1SS355 QS11 23114499 TRANSISTOR, RN1404 DB90 23316231 DIODE, 1SS355 QS12 23114499 TRANSISTOR, RN1404 DD101 23316542 DIODE, ZENER, MA8039-L, TX QS13 23114499 TRANSISTOR, RN1404 DD201 23118041 DIODE, MA111 QS14 23114499 TRANSISTOR, RN1404 DD202...
  • Page 38 23566307 OWNERS MANUAL, ENG/FRE/SPA Y109 23945015 BAG, POLYETHYLENE COVER, 250X400 Y170 23845800 WIRE HOLDER, NYLON66 D6.8 CABINET PARTS A201 23532746 COVER, FRONT BEZEL ASSY 26HL84 A202 23940056 PIECE, PIECE KEY ASSY A203 23940025 PIECE, PIECE POWER ASSY A215 23940043 PIECE, CAP P SWITCH...

  • Page 39: Pc Boards Bottom View

    SIGNAL BOARD PD1753A1 (U901A) TOP (COMPONENT) SIDE P515B PR80 PV02 PV23B L_VARIOUT PV04 PV03 PV01 R_VARIOUT LV283 LV282 CC99 L_MONI R_MONI GND_V_MONI PV22A V_MONI PD1753 QV12 CV65 CV68 CV68 23599267 QV12 RV61 CV253 RV330 DV244 R_HDMI CV254 RV331 DV249 DV250 QS05 CV255 RV332...
  • Page 40 SIGNAL BOARD PD1753A1 (U901A) BOTTOM (FOIL) SIDE PR80 PV01 PV02 PV03 PV04 P515B CC99 RS80 RC05 RC07 RC07 QS17 QS17 PV23B CS34 RS27 CS34 CS18 QS18 RS27 QS18 RS28 CS35 RS112 RS28 CS35 RS116 QS08 RS34 CS39 QS09 RS83 RS34 RS33 CS20 QS07...
  • Page 41 FRONT/AV BOARD PD1753A2 (U901B) FRONT/AV BOARD PD1753A2 (U901B) AV2 BOARD PD1753A3 (U901C) AV2 BOARD PD1753A3 (U901C) TOP (COMPONENT) SIDE BOTTOM (FOIL) SIDE TOP (COMPONENT) SIDE BOTTOM (FOIL) SIDE 23599267 DS-7405 DS-7405 RV122 23547608 RV122 PD1753 PD1753 23547608 23599267 CV121 RV121 RV129 RV129 RV121...
  • Page 42 IR/LED BOARD PD1753A6 (U901F) IR/LED BOARD PD1753A6 (U901F) TOP (COMPONENT) SIDE BOTTOM (FOIL) SIDE BB01 23599267 DS-7405 23547608 BB02 CB58 CB57 CB58 RB15 KB01 RB15 PD1753 DB51A CB61 CB61 LB52 RB69 CB53 RB66 LB52 CB57 RB65 RB65 DB01 CB53 RB56 RB71 RB66 KB01...
  • Page 43 TN/A-OUT BOARD PD1754A1 (U902) TN/A-OUT BOARD PD1754A1 (U902) TOP (COMPONENT) SIDE BOTTOM (FOIL) SIDE CS501 CS501 GR608 Q677 GR608 CS510 R615 R686 R687 R687 QS102 DS102 RFAGC RS515 Q676 Q675 RFAGC C688 Q676 R671 C669 C669 C679 C679 VT(NC) VT(NC) PP21 C678 R613...
  • Page 44 SCALER BOARD PD1755B1 (U903) TOP (COMPONENT) SIDE – 49 – – 50 –...
  • Page 45 SCALER BOARD PD1755B1 (U903) BOTTOM (FOIL) SIDE – 51 – – 52 –...

  • Page 46: Circuit Block Diagram

    CIRCUIT BLOCK DIAGRAM 1M x 32bit 2M x 32Mbit SDRAM DDR-SDRAM V_AV_MC SYNC_M YPbPr1 YPbPr1 YCbCr G-HYPER 133MHz 3ch A/D V_AV MST9883M C_AV DVCD COMB Y_COMB_S QZ501 RGB 8:8:8 4:2:2 CVBS/Y THC63LV CVBS/Y gm6015 TC90A94TB QY100 TC90A92 LVDS V_PIP DM83R TC90A45F C_COMB_S QV01...
  • Page 47 SCHEMATIC DIAGRAM MODEL : 26HL84 WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON THE MANUAL FOR THIS MODEL. CAUTION: The international hazard symbols " " in the schematic diagram and the parts list designate components which have special characteristics important for safety and should be replaced only with types identical to those in the original circuit or specified in the parts list.
  • Page 48 SCHEMATIC DIAGRAM STRUCTURE: – SIGNAL Circuit CONNECTOR [ SHEET– 1/7 ] ....1/57 – AV [ SHEET– 2/7 ] ....2/57 – TERMINAL [ SHEET– 3/7 ] ....3/57 – COLOR DIFFERENCE SWITCHING [ SHEET– 4/7 ] ....4/57 – V/C [ SHEET–...

  • Page 49: Specifications

    TheaterLink OUTPUT: 3 V (p-p), 10k ohms INPUT 3 V (p-p) to 5 V (p-p), PCM (Toshiba TV code) over 38k Hz carrier Dimensions (Including stand) Width: 27-11/64 inches (690 mm) Height: 22-55/64 inches (580 mm) Depth: 12-1/8 inches (308 mm) Mass (weight) 52-1/4 lbs (23.7 kg)
  • Page 50 TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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