Toshiba LCD-AD194TW Service Manual

Toshiba LCD-AD194TW Service Manual

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SERVICE MANUAL

TOSHIBA
LCD-AD194TW
THESE
DOCUMENTS
ARE
FOR
REPAIR
SERVICE
INFORMATION
ONLY.EVERY
REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL;
WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF
PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATA :Jul-28-2006
AD194TW TOSHIBA
Page 1 of 62

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Summary of Contents for Toshiba LCD-AD194TW

  • Page 1: Service Manual

    SERVICE MANUAL TOSHIBA LCD-AD194TW THESE DOCUMENTS REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
  • Page 2: Table Of Contents

    4.4 Panel Specification ----------------------------------------------------------------11 4.4.1 General Feature (HSD190ME13-A11) -------------------------------------11 4.4.2 Optical Characteristics -------------------------------------------------------12 5. Block Diagram ------------------------------------------------------------------------------13 5.1 Monitor Exploded View -------------------------------------------------------------13 5.2. Disassemble Process --------------------------------------------------------------15 5.3 Software Flow Chart ------------------------------------------------------------------19 5.4. Block Diagram ---------------------------------------------------------------------------21 AD194TW TOSHIBA Page 2 of 62...
  • Page 3 8.1 Equipments and Tools Requirements -------------------------------------------36 8.2 Trouble Shooting ---------------------------------------------------------------------37 8.2.1 Main Board ---------------------------------------------------------------------37 8.2.2 Key Pad Board ------------------------------------------------------------------39 8.2.3 Power/Inverter Board ------------------------------------------------------40 9. White-Balance, Luminance Adjustment ---------------------------------------------42 10. EDID Content -----------------------------------------------------------------------------44 11. BOM List -----------------------------------------------------------------------------------45 11.1 AD194T——T981KH6NJ4D4ABP ------------------------------------------45~62 AD194TW TOSHIBA Page 3 of 62...
  • Page 4: Revision List

    Revision List Revision Date Change Description AD194TW TOSHIBA Page 4 of 62...
  • Page 5: Product Feature

    Monitor Block Diagram Flat Panel and CCFL Drive. CCFL backlight Main Board Power board RS232 Connector (Include: adapter, inverter) For white balance adjustment in factory mode Keyboard AC IN HOST Computer Video signal, DDC 100~240V AD194TW TOSHIBA Page 5 of 62...
  • Page 6: Operation Instructions

    Press the power button to turn on the monitor, the power indicator will light up. 3.2 CONTROL BUTTONS 3.2.1 KEY CONTROL Power On/Off Auto Adjustment OSD Menu for Clock, Phase and H.V. Position Volume +, - & Menu Select 3.3 ADJUSTING THE PICTURE AD194TW TOSHIBA Page 6 of 62...
  • Page 7: Electrical Performance Parameter

    4.1 INPUT SIGNAL CONNECTOR PIN NO. DESCRIPTION PI N NO. DESCRIPTION Red Video Green Video Detect Cable Blue Video RS232 RS232 DDC-Serial Data DDC-Return H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground D-SUB 15 PIN CONNECTOR AD194TW TOSHIBA Page 7 of 62...
  • Page 8: Factory Preset Display Modes

    48.077 72.188 50.000 800x600@75Hz 1056x625 46.875 75.000 49.500 1024x768@60Hz 1344x806 48.363 60.004 65.000 1024x768@70Hz 1328x806 56.476 70.069 75.000 1024x768@75Hz 1312x800 60.023 75.029 78.750 1280x1024@60Hz 1688x1066 63.981 60.020 108.000 SXGA 1280x1024@75Hz 1688x1066 79.976 75.025 135.000 AD194TW TOSHIBA Page 8 of 62...
  • Page 9: Power Supply

    < 60A peak at 264 VAC and cold starting Leakage Current < 3.5mA No advance effects (no loss of information or defect) Power line surge with a maximum of 1 half-wave missing per second AD194TW TOSHIBA Page 9 of 62...
  • Page 10: Inverter Max Brightness

    ITEM SYMBOL MIN. TYP. MAX. UNIT REMARK Input voltage 10.8 13.2 Input current FOR 4 LOAD Output Current Iout FOR 1 LOAD Frequency FOR 1 LOAD Start voltage 1430 Vrms RL=CCFL Protect delay time AD194TW TOSHIBA Page 10 of 62...
  • Page 11: Panel Specification

    Input signal 2-ch LVDS System 3.05 Power consumption(W) Optimum viewing direction 6 o’clock Contrast ratio 550:1(typ.) Viewing angle 150(H) x 135(V) Response time 8ms(typ.) Luminance 250cd/ m² Power supply voltage LCD panel signal processing board:5V AD194TW TOSHIBA Page 11 of 62...
  • Page 12: Optical Characteristics

    0.109 0.280 0.310 0.340 White 0.300 0.330 0.360 Hor. θL Ver. θR Viewing angle CR>10 Hor. θH Ver. θL Hor. θL Ver. θR Viewing angle CR>5 Hor. θH Ver. θL θ=0° Brightness uniformity ф=0° AD194TW TOSHIBA Page 12 of 62...
  • Page 13: Block Diagram

    5. BLOCK DIAGRAM 5.1 MONITOR EXPLODED VIEW AD194TW TOSHIBA Page 13 of 62...
  • Page 14 SCREW M1G1030-6-120 4PCS SCREW Q1G1030-8-120 4PCS SPEAKER 78G322502-L 1PCS STAND Ass’y LIST CLAMP 33G4895-1-C 1PCS STAND 34G1546-UU-3B 1PCS SCREW AM1G1740-10-120 4PCS BASE 34G6203-UU-2B 1PCS RUBBER FOOT 12G394-3 4PCS HINGE 37G510-1 1PCS SCREW Q1G1040-10-120 3PCS AD194TW TOSHIBA Page 14 of 62...
  • Page 15: Disassemble Process

    7、 Disassemble connect pins of the main board to panel, showed in Fig.15,16. 8、 Remove the bezel, showed in Fig.17. Do not scratch the panel. 9、 Disassemble the screws that fix the panel, showed in Fig.18,19. 10、That’all, the process is over. 5.2.3 Pictures: Cushion (Fig.1) (Fig.2) AD194TW TOSHIBA Page 15 of 62...
  • Page 16 (Fig.3) (Fig.4) (Fig.5) (Fig.6) (Fig.7) (Fig.8) (Fig.9) (Fig.10) AD194TW TOSHIBA Page 16 of 62...
  • Page 17 (Fig.11) (Fig.12) (Fig.13) (Fig.14) (Fig.15) (Fig.16) (Fig.17) AD194TW TOSHIBA Page 17 of 62...
  • Page 18 (Fig.18) (Fig.19) (Fig.20) AD194TW TOSHIBA Page 18 of 62...
  • Page 19: Software Flow Chart

    5.3 SOFTWARE FLOW CHART AD194TW TOSHIBA Page 19 of 62...
  • Page 20 16) Display "No connection Check Signal Cable" message. And go into standby mode after the message disappear. 17) Program the scalar to be able to show the coming mode. 18) Process the OSD display. 19) Read the keyboard. Is the power key pressed ? AD194TW TOSHIBA Page 20 of 62...
  • Page 21: Block Diagram

    5.4.1 ELECTRICAL BLOCK DIAGRAM LCD Interface Flash Memory Scalar TSUM57AK (Include:MCU,ADC,OSD) H-SYNC Crystal EPR_SDA V-SYNC 14.31818MHz EPR_SCL OSD Control EEPROM D-Sub Interface 24C16 Connector Connector (Key pad) DB7_SDA DB15_SDA DB6_SCL DB15_SCL EEPROM EEPROM 24C02 24C02 AD194TW TOSHIBA Page 21 of 62...
  • Page 22: Inverter/Power Board Block Diagram

    5.4.2 INVERTER/POWER BOARD BLOCK DIAGRAM Inverter Block Diagram AD194TW TOSHIBA Page 22 of 62...
  • Page 23 Power Block Diagram AD194TW TOSHIBA Page 23 of 62...
  • Page 24: Schematic

    +12V 5.PANEL INTERFACE PC5V VCTRL VCTRL +3V3 VCC1.8 Adj_BACKLIGHT Adj_BACKLIGHT VCC5V VCC3.3 VLCD VLCD_12V Title 4.SCALER VLCD TSUM57AK VLCD_12V Size Document Number 2.POWER Date: Monday , May 30, 2005 Sheet AD194TW TOSHIBA Page 24 of 62...
  • Page 25: Main Board

    C431 OUT-L- OUT-R- KEY _AUTO KEY _MENU KEY _RIGHT KEY _LEFT PMBS3904 POWER KEY _C OUT-R+ CONN OUT-L+ OUT-L- OUT-R- Title TSUM57AK CONN Size Document Number SCALER Date: Monday , May 30, 2005 Sheet AD194TW TOSHIBA Page 25 of 62...
  • Page 26: Panel Interface

    CPT 17 3.3V 3.3V INNOLUX 15 HannStar 15 3.3V 3.3V CPT 15 3.3V 3.3V LG 15 3.3V 3.3V 3.3V Innolux 17" Title TSUM57AK Size Document Number PANEL INTERFACE Date: Monday , May 30, 2005 Sheet AD194TW TOSHIBA Page 26 of 62...
  • Page 27 C715 Q707   on_Panel_12V PMBS3904 0.1uF C718 0.1uF C717 R727 PMBS3904 C720 C719 R728 0.1uF 10uF/16V 1/16W Title   NC/0.1uF NC/10uF/16V NC/4K7 TSUM57AK Size Document Number POWER Date: Monday , May 30, 2005 Sheet AD194TW TOSHIBA Page 27 of 62...
  • Page 28   1/16W ESD_5V C447 C448 C449 C450 C451 C452 C453 C454 Title D425 TSUM57AK 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF RLZ36B Size Document Number INPUT Date: Monday , May 30, 2005 Sheet AD194TW TOSHIBA Page 28 of 62...
  • Page 29: Pwpc Board

    PWPC BOARD 6.3.1 ADAPTER   AD194TW TOSHIBA Page 29 of 62...
  • Page 30 6.3.2 INVERTER AD194TW TOSHIBA Page 30 of 62...
  • Page 31: Keypad Board

    6.4 KEYPAD BOARD   AD194TW TOSHIBA Page 31 of 62...
  • Page 32: Audio Board

    6.5 AUDIO BOARD AD194TW TOSHIBA Page 32 of 62...
  • Page 33: Pcb Layout

    7. PCB LAYOUT 7.1 MAIN BOARD 715G1558-1-IO AD194TW TOSHIBA Page 33 of 62...
  • Page 34 AD194TW TOSHIBA Page 34 of 62...
  • Page 35: Pwpc Board

    7.2 PWPC BOARD 715G1349-2-IO AD194TW TOSHIBA Page 35 of 62...
  • Page 36: Keypad Board

    7.3 KEYPAD BOARD 715G1496-1-IO 7.4 AUDIO BOARD 715G1144-4NMV 8. MAINTAINABILITY 8.1 EQUIREMENT AND TOOLS REQUIREMENT 1、Voltmeter. 2.、Oscilloscope. 3、Pattern Generator. 4、DDC Tool with a Compatible Computer. 5、Alignment Tool. 6、LCD Color Analyzer. 7、Service Manual. 8、User Manual. AD194TW TOSHIBA Page 36 of 62...
  • Page 37: Trouble Shooting

    Replace Power board and Check Replace U401 (TSUM57AK) Inverter control relative circuit Re-do White balance adjust Note:1. If replace “MAIN-BOARD” , Please re-do “DDC-content” programmed & “WHITE-Balance”. 2. If replace “Power Board” only, Please re-do “ WHITE-Balance” AD194TW TOSHIBA Page 37 of 62...
  • Page 38 If Bklt-On no-response when the power switch Pin10 PWM signal control dim 0V-5V turn on-off, Replace U401 TUSM57AK Replace power board to new-one and check Replace Power board the screen is normal? & Re-do white balance AD194TW TOSHIBA Page 38 of 62...
  • Page 39: Keypad Board

    OSD is unstable or not working Connect Key Pad Board Is Key Pad Board connecting normally ? Replace Button Switch Is Button Switch normally ? Replace Key Pad Board Is Key Pad Board normally ? Check Main Board AD194TW TOSHIBA Page 39 of 62...
  • Page 40: Power/Inverter Board

    Repeating the start voltage Check the auxiliary voltage is bigger than 10V smaller than 20V 1) Check IC901 2) Check ZD901, Q902, Q903…OVP circuit Check IC901 pin8 PWM wave Check IC 901 Check Q903,R919, T901,D910,D912,ZD904 AD194TW TOSHIBA Page 40 of 62...
  • Page 41 Check the pin19/20 of U201 have saw tooth wave Check ZD201/ZD202 Check the resonant wave of pin2 & pin5 for PT201 Check Q204/Q208 Check the output of PT201 Change PT201 Check connecter & lamp AD194TW TOSHIBA Page 41 of 62...
  • Page 42: White-Balance, Luminance Adjustment

    6、Adjust the BLUE of 9300K on factory window until chroma 7120 indicator reached the value B=100 7、Repeat above procedure ( item 4,5,6) until chroma 7120 RGB value meet the tolerance =100±2 B、Adjust 7200K color-temperature 1、Switch the Chroma-7120 to RGB-Mode (with press “MODE” button ) AD194TW TOSHIBA Page 42 of 62...
  • Page 43 6、Adjust the BLUE of SRGB on factory window until chroma 7120 indicator reached the value B=100 7、Repeat above procedure ( item 4,5,6) until chroma 7120 RGB value meet the tolerance =100±2 E、Press reset key and Turn the Power-button “off to on” to quit from factory mode. AD194TW TOSHIBA Page 43 of 62...
  • Page 44: Edid Content

    10. EDID CONTENT EDID CONTENT——Analog FD 56 9D 24 BF EF 00 BC 34 2D 11 FD 00 EDID CONTENT——DVI FD 56 9D 24 BF EF 00 2D 11 FD 00 AD194TW TOSHIBA Page 44 of 62...
  • Page 45: Bom List

    PE BAG FOR MANUAL 45G 88606 TS PE BAG FOR BASE 45G 88626 TS PE BAG FOR MONITOR 50G 600 2 HANDLE1 50G 600 3 HANDLE2 1186 SMALL TAPE 1211 A 铝箔胶带 1901 A 铝箔胶带 AD194TW TOSHIBA Page 45 of 62...
  • Page 46 AUDIO BOARD SMT ASS'Y CN204 33G3278 3 WAFER 3P PLUG 2.55mm CN202 33G802414C H WAFER U201 56G 616 1 AMPLIFIER IC E-TDA7496L R212 61G 60220152T CFR 200 OHM +-5% 1/6W C201 67G305V471 3 470UF +-20% 16 AD194TW TOSHIBA Page 46 of 62...
  • Page 47 J204 95G 90 23 TINCOATEDCOPPER J205 95G 90 23 TINCOATEDCOPPER J206 95G 90 23 TINCOATEDCOPPER 715G1144 4NMV AUDIO BOARD PARENT NO : CBPC981KH6DTP MAIN BOARD AIC981KH6DTP MAIN BOARD SMT CN404 33G801714A BH PIN HEADER AD194TW TOSHIBA Page 47 of 62...
  • Page 48 57G 763 1 AO3401L FB410 61L0603000 CHIPR 0OHM +-5% 1/10W FB411 61L0603000 CHIPR 0OHM +-5% 1/10W FB412 61L0603000 CHIPR 0OHM +-5% 1/10W R419 61L0603000 CHIPR 0OHM +-5% 1/10W R421 61L0603000 CHIPR 0OHM +-5% 1/10W AD194TW TOSHIBA Page 48 of 62...
  • Page 49 CHIPR 1KOHM +-5% 1/10W R447 61L0603102 CHIPR 1KOHM +-5% 1/10W R470 61L0603102 CHIPR 1KOHM +-5% 1/10W R476 61L0603102 CHIPR 1KOHM +-5% 1/10W R477 61L0603102 CHIPR 1KOHM +-5% 1/10W R701 61L0603102 CHIPR 1KOHM +-5% 1/10W AD194TW TOSHIBA Page 49 of 62...
  • Page 50 R474 61L0603392 CHIP 3.9K OHM 1/10W R475 61L0603392 CHIP 3.9K OHM 1/10W R437 61L0603471 CHIPR 470OHM+-5%1/10W R422 61L0603472 CHIP 4.7KOHM +-5% 1/10W R423 61L0603472 CHIP 4.7KOHM +-5% 1/10W R705 61L0603472 CHIP 4.7KOHM +-5% 1/10W AD194TW TOSHIBA Page 50 of 62...
  • Page 51 65G0603104 32 CHIP 0.1UF 50V X7R C446 65G0603104 32 CHIP 0.1UF 50V X7R C447 65G0603104 32 CHIP 0.1UF 50V X7R C448 65G0603104 32 CHIP 0.1UF 50V X7R C449 65G0603104 32 CHIP 0.1UF 50V X7R AD194TW TOSHIBA Page 51 of 62...
  • Page 52 CHIP BEAD 0805 600OHM FB405 71G 56Z601 M CHIP BEAD 0805 600OHM FB406 71G 56Z601 M CHIP BEAD 0805 600OHM FB407 71G 56Z601 M CHIP BEAD 0805 600OHM FB408 71G 56Z601 M CHIP BEAD 0805 600OHM AD194TW TOSHIBA Page 52 of 62...
  • Page 53 SCHOTTKY DIODE 1A 40V SM 715G1558 1 IO MAIN PCB PARENT NO : KEPC980KE9P KEPC AIK980KE9P KEPC-AI CN003 33G3802 3H WAFER&PLUG CN004 33G3802 3H WAFER&PLUG CN001 33G801712A BH PIN HEADER R101 61G 60275052T 75OHM 5% 1/6W AD194TW TOSHIBA Page 53 of 62...
  • Page 54 10PF 5% SL 3KV TDK C236 65G 3J1006ET 10PF 5% SL 3KV TDK C238 65G 3J1006ET 10PF 5% SL 3KV TDK C205 65G 3J5096ET 5PF 5% SL 3KV C209 65G 3J5096ET 5PF 5% SL 3KV AD194TW TOSHIBA Page 54 of 62...
  • Page 55 95G 90 23 TINCOATEDCOPPER CN304 95G8013 3 31 WIRE HARNESS CN902 95G8021 12518 WIRE HARNESS 705G 560 61 06 R903 ASS'Y (ROHS) 705G 780 57 51 Q901 ASS'Y 705G 980 87 02 CN901 ASS'Y AD194TW TOSHIBA Page 55 of 62...
  • Page 56 61L0805000 Chip Resistors 0OHM R242 61L0805000 Chip Resistors 0OHM R923 61L0805000 Chip Resistors 0OHM R925 61L0805000 Chip Resistors 0OHM R909 61L0805100 CHIPR 10 OHM +-5% 1/8W R216 61L0805100 4F CHIPR 1M OHM +-1% 1/8W AD194TW TOSHIBA Page 56 of 62...
  • Page 57 61L0805333 CHIP 33KOHM 1% 1/8W R213 61L0805362 CHIP 3.6KOHM 1/8W R229 61L0805362 CHIP 3.6KOHM 1/8W R110 61L0805365 1F SMD 3.65KOHM/0805/+-1% R210 61L0805431 CHIP 430OHM 5% 0805 1/8 R215 61L0805431 CHIP 430OHM 5% 0805 1/8 AD194TW TOSHIBA Page 57 of 62...
  • Page 58 CHIP 0.1UF 50V X7R 0805 C212 65G0805104 32 CHIP 0.1UF 50V X7R 0805 C217 65G0805104 32 CHIP 0.1UF 50V X7R 0805 C226 65G0805104 32 CHIP 0.1UF 50V X7R 0805 C227 65G0805104 32 CHIP 0.1UF 50V X7R 0805 AD194TW TOSHIBA Page 58 of 62...
  • Page 59 C207 65G1206225 17 1206 2.2UF -20%~+80% 16 C231 65G1206225 17 1206 2.2UF -20%~+80% 16 C233 65G1206225 17 1206 2.2UF -20%~+80% 16 C234 65G1206225 17 1206 2.2UF -20%~+80% 16 F201 84G 52 2 CHIP FUSE AD194TW TOSHIBA Page 59 of 62...
  • Page 60 MGFR 3M OHM +-5% 1/2W C906 65G 2K152 1T6921 1.5NF/2KV Y5P +-10% C925 65G517K102 5T 1000PF 10% Y5P 500V C922 67G 2151007NT 10UF 50V C907 67G 2152207NT 22UF/50V JP204 71G 55 19 T FERRITE BEAD AD194TW TOSHIBA Page 60 of 62...
  • Page 61 95G 90 23 TINCOATEDCOPPER J235 95G 90 23 TINCOATEDCOPPER J236 95G 90 23 TINCOATEDCOPPER J237 95G 90 23 TINCOATEDCOPPER J238 95G 90 23 TINCOATEDCOPPER J239 95G 90 23 TINCOATEDCOPPER J240 95G 90 23 TINCOATEDCOPPER AD194TW TOSHIBA Page 61 of 62...
  • Page 62 SHRINK TUBE UL/CSA PARENT NO : 705G 980 93 04 D910/D911 ASS'Y 51G 200 1 散热油 90G6081 1 HEAT SINK D910 93G 60242 SRF20150C TO-220 D911 93G 60242 SRF20150C TO-220 XN01A M1G1730 8120 SCREW AD194TW TOSHIBA Page 62 of 62...

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