Hitachi CML181SXW Service Manual
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Hitachi CML181SXW Service Manual

Hitachi CML181SXW Service Manual

Tft lcd display panel
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CAUTION:
Before servicing this chassis, it is important that the service technician read the "Safety
Precautions" and "Product Safety Notices" in this service manual.
ATTENTION:
Avant d'effectuer l'entretien du châassis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise" und „Hinweise
zur Produktsicherheit" in diesem Wartungshandbuch zu lesen.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
SERVICE MANUAL
TFT LCD DISPLAY PANEL
October 2001
No. 0413
CML181SXW
Data
contained
within
this
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d'entretien peuvent faire l'objet
de modifications en vue de perfectionner
le produit.
Die
in
diesem
Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
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Summary of Contents for Hitachi CML181SXW

  • Page 1 No. 0413 CML181SXW SERVICE MANUAL Data contained within this Service manual is subject to alteration for improvement. Les données fournies dans le présent manuel d’entretien peuvent faire l’objet CAUTION: de modifications en vue de perfectionner le produit. Before servicing this chassis, it is important that the service technician read the “Safety Precautions”...

  • Page 2: Table Of Contents

    1. ELECTRICAL REQUIREMENTS................5 A. LCD Panel Specification......................5 B. CONTROLS ..........................6 C. Power Management ........................ 6 D. Display Modes FOR Inspections..................... 8 2. VL-706 DISPLAY CONTROL BOARD ...............9 A. Description ..........................9 B. Features ..........................9 C. BLOCK DIAGRAM ........................9 D.
  • Page 3 A. Quick specification review......................19 7. CIRCUIT DESCRPTION ..................19 A. Display-Controller ........................19 B. Circuit of Plug and Play ......................19 C. System Clock .......................... 19 D. Power Regulator ........................19 8. INTRODUCTION....................20 A. Front Panel Control and Led ....................20 B.
  • Page 4 WARNING 1) Critical Components are marked with the symbol of # in the material list. For continued protection against Low Radiation, replace only with same part number. This symbol warns the personnel that un-insulated voltage within the unit may have sufficient magnitude to cause electric shock.

  • Page 5: Electrical Requirements

    1. ELECTRICAL REQUIREMENTS A. LCD Panel Specification Display: 18.1 inch (18.1” viewable image size): active matrix: thin film transistor (TFT): liquid crystal display (LCD): 0.2805 mm dot pitch: R.G.B. Vertical stripe 200 cd//m white luminance, typical: 200:1 contrast ratio, Min. Compatibility: 640 x 350: VGA-350 720 x 400: VGA text...

  • Page 6: Controls

    B. CONTROLS B-1 Control panel (monitor front panel) 1. Power LED 2. Adjust decrease. 3. Adjust increase. 4. Function select counter-clockwise. 5. Function select clockwise. 6. Power ON/OFF switch, push to ON and push to OFF. (toggle switch) 7. Ear phone jack. 8.
  • Page 7 C-2 Power Consumption Meet VESA DPMS Proposal On mode 54 Wmax Stand-by 5 Wmax Suspend 5 Wmax Off mode 5 Wmax DC power off 5 Wmax disconnection 5 Wmax Measured from AC input end of AC power adapter. Power saving states are measured with speakers attached but not worked.

  • Page 8: Display Modes For Inspections

    D. Display Modes FOR Inspections D-1 Supported Timing FH(KH SYNC TOTAL ACTIVE SYNC FRONT BACK PIXEL TIMING FV(HZ) POLARITY (DOT/LINE) (DOT/LINE) WIDTH PORCH PORCH FOREQ.(MHZ) (DOT/LINE) (DOT/LINE) (DOT/LINE) 640x350 31.469 25.175 VGA-350 70.087 640x400 31.469 25.175 VGA-GRAPH 70.087 640x400 31.5 25.197 NEC PC9821 70.15...

  • Page 9: Vl-706 Display Control Board

    2. VL-706 DISPLAY CONTROL BOARD A. Description The VL-706 display control board is design to directly convert the analog RGB signals from standard VGA display card to optimum LCD timing signals so as to construct a high display quality LCD monitor. B.

  • Page 10: Connector Locations

    D. Connector Locations E. Connector Type Location Type Maker Number of pins 1211-15 E&T 15 74320-1004 FEMALE 96113-1203 E&T 12 96113-0513 E&T 5 96113-1003 E&T 10 96118-0413 E&T 4 98210-3011 E&T 30 F. Connector pin assignment Pin NO. Signal Comment R-Video Red Video Input.
  • Page 11 Terminal No. Symbol Function 28,29,30 5V POWER SUPPLY TXE0- LVDS EVEN OUTPUT DATA PAIRS TXE0+ LVDS EVEN OUTPUT DATA PAIRS TXE1- LVDS EVEN OUTPUT DATA PAIRS TXE1+ LVDS EVEN OUTPUT DATA PAIRS TXE2- LVDS EVEN OUTPUT DATA PAIRS TXE2+ LVDS EVEN OUTPUT DATA PAIRS TXECLK- LVDS EVEN OUTPUT DATA PAIRS TXECLK+...
  • Page 12 Pin NO. Signal Comment 12 VCC 12 VCC Power Input 5 VCC 5V Power Input Pin NO. Signal Comment MUTE Volume ON/OFF control LED-Y Power saving mode LED-G Monitor is ON KEY-UP Function select counter-clockwise key KEY-DOWN Function select counter-clockwise key KEY-R Adjust up key KEY-L...

  • Page 13: Vc-702 Lvds Signal Transfer Board

    3. VC-702 LVDS SIGNAL TRANSFER BOARD A. Description The VC-702 is the transfer PCB for LVDS signal transfer to LCD panel. B. Connector Locations LCM888 VC-702 REV: 1 C. Connector Type Location Type Maker Number of pin Pitch 98210-3011 E&T 0.5mm 3800-30 E&T...

  • Page 14: Vk-517 Control Panel And Audio Board

    4. VK-517 Control Panel and Audio Board A. Description The VK-517 is designed to offer an user interfaced control panel which passes and receives signals to and from VL-706 display control board. Also there is a stereo audio amplifier to drive a pair of speakers .When in power saving mode the audio circuit can be turned off by the control signal from VL-706 board.
  • Page 15 D-2 J5 Pin NO. Signal Comment MUTE Volume ON/OFF control LED-Y Power saving mode. LED-G Monitor on mode. 4,10 KEY-UP Function select up to VL-706 KEY-DOWN Function select down to VL-706 KEY-R Function select right to VL-706 KEY-L Function select left to VL-706 KEY-PWR Power ON/OFF signal to VL-706 D-3 J3 and J4...
  • Page 16 D-5 Switch definition Location Definition Power ON/OFF Function select by clockwise direction Function select by counter-clockwise direction Adjust up Adjust down D-6 LED definition Location Definition Green for ON mode; Dark for DC power off; Yellow for stand by; suspend; off mode.

  • Page 17: Vm-517 Power And Audio

    5. VM-517 POWER and AUDIO A. Major Specification Input voltage: 12V±5% from adapter (LSE 9901B1260) Inout current: 5A max. Output: ITEM Output Voltage Max Load. Min Load Tolerance Ripple & Noise(max) ± +5.1V 1.9A 0.19A 150mVpp B. Description The VM-517 is designed to supply the power to the VL-706 display control board. Under the control of VL-706, it can run into power saving mode so that saving the power of the whole monitor.

  • Page 18: Connector Pin Assignment

    F. Connector pin Assignment J801 DC 12V Input Pin No Signal Comment Pin 1 +12V From adapter output cable Pin 2 From adapter output cable J802 FOR I/F CKT Pin No Signal Comment Pin 1 +12V From adapter +12V power Pin 2 +5.1V Supply for I/F CKT...

  • Page 19: Ac Adapter (Lsl9901B12320)

    6. AC Adapter (LSL9901B12320) A. Quick specification review • Input voltage Single phase, 50/60HZ, 100VAC to 240VAC ±10% • Input current 1.5A (max), at 90VAC input and full load 0.75A (max), at 264 VAC input and full load. • Inrush current @ cold start 30A(0-peak)@ 110Vac ,50A(0-peak) @ 220Vac •...

  • Page 20: Introduction

    8. INTRODUCTION A. Front Panel Control and Led Front Panel Controls Item Control Function Power Switch Turns the monitor on and off. Power LED 1. Green indicates monitor is turns on. 2. Dark indicates DC power off. 3. Yellow indicates stand-by, suspend, off mode.

  • Page 21: Rear Panel Connector Input Signals

    B. Rear Panel connector Input Signals Rear Panel Cable and Connector Item Cable / Connector Function Signal Connectors the video cable Connector Power Connectors the adapter cable Connector Audio connector Connector the audio cable...

  • Page 22: Troubleshooting

    9. TROUBLESHOOTING A. Main Procedure...

  • Page 23: Power Circuit Troubleshooting

    B. Power Circuit Troubleshooting...

  • Page 24: Backlights Troubleshooting

    C. Backlights Troubleshooting...

  • Page 25: Performance Troubleshooting

    D. Performance Troubleshooting...

  • Page 26: Function Troubleshooting

    E. Function Troubleshooting...

  • Page 27: Appendix A: Display Unit Assembly

    APPENDIX A: Display Unit Assembly...
  • Page 28 No. 0413 Assembly Drawing of Screen.
  • Page 29 No. 0413 Assembly Drawing of Base.

  • Page 30: Appendix B: Pcb Assembly

    APPENDIX B: PCB ASSEMBLY...
  • Page 31 No. 0413 VL-706 VGA Input...
  • Page 32 No. 0413 VL-706 ADC...
  • Page 33 No. 0413 VL-706 TMDS...
  • Page 34 No. 0413 Scaler and MCU...
  • Page 35 No. 0413 VL-706 Flash ROM...
  • Page 36 No. 0413 VL-706 MSIC...
  • Page 37 No. 0413 VL-706 Power...
  • Page 38 No. 0413 VL-706 LVDS...
  • Page 39 No. 0413 VL-706 Keypad...
  • Page 40 No. 0413 VM-517 Audio Board 1...
  • Page 41 No. 0413 VM-517 Audio Board 2...
  • Page 43 THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA...
  • Page 44 Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: [email protected] Fax: +39 02 48786381/2 Email: [email protected] HITACHI EUROPE S.A.S HITACHI EUROPE LTD (Norway) AB Lyon Office STRANDVEIEN 18 B.P. 45, 69671 BRON CEDEX 1366 Lysaker FRANCE...

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