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Hitachi CML155XW Service Manual

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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
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
NOV 2001
No. 0411
CML155XW
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.
Service

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  • Page 1 No. 0411 CML155XW SERVICE MANUAL MANUEL D'ENTRETIEN WARTUNGSHANDBUCH CAUTION: Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual. Data contained within this Service manual is subject to alteration for improvement.
  • Page 2 ALL PRODUCTS CE MARK Before any service is performed on the chassis an 1. HITACHI products may contain the CE mark on isolation transformer should be inserted between the the rating plate indicating that the product power line and the product.

  • Page 3: Table Of Contents

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) ABLE OF ONTENTS 1. Precaution and Notices ………….……………………………………… 1.1 Safety Precaution ………….………………………………………. 1.2 Product Safety Notice ……………………………………………… 4 1.3 Service Notes ………………………………………………………. 4 2. Specifications ………….……………………………...………………… 5 2.1 Monitor Specifications ……..………………………………………. 5 2.2 Stereo Speaker …..………………………………………………….
  • Page 4 HITACHI CML155XW LCD Monitor Service Manual (v1.0) Appendix A. Main Board Block Diagram Appendix B. Mainboard Circuit Diagrams Appendix C. Audio Board Circuit Diagram Appendix D. Keyboard Circuit Diagram Appendix E. Inverter Circuit Diagram Appendix F. Troubleshooting Flow Chart Appendix G. Proposed Repair Parts List Appendix H.

  • Page 5: Precaution And Notices

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) 1. Precautions and Notices 1.1 Safety Precautions Although LCD monitors are displays with lower voltage than in the CRTs, the following precautions still should be take care of. 1) Observe all cautions and safety related notes located inside the display cabinet and on the display chassis.

  • Page 6: Specifications

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) 2. Specifications 2.1 Monitor Specification Power Input Voltage AC 100V to 240 V, 50/60 Hz (External AC Adapter) Power Consumption LED color is green: < 40 W LED color is amber: < 5 W...

  • Page 7: Stereo Speaker

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) Panel Characteristics Panel Type 15-in (38.1 cm) XGA TFT LCD (active matrix) Pixel Format 1024(H) x 768(V) (1 pixel = R+G+B dot) Pixel Pitch 0.297 mm(H) x 0.297 mm(V) Pixel Configuration R、G、B vertical stripe Display Area 304.1 mm(H) x 228.1 mm(V)

  • Page 8: Timing Supported - Analog Inputs

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) 2.3 Timing Supported – Analog Inputs Mode Resolution (kHz) (Hz) Pixel Clock (MHz) H pol. V pol.. 640 x 350 31.47 70.09 25.18 640 x 480 31.47 59.94 25.18 640 x 480 37.80 72.81...

  • Page 9: Control Buttons And Functions

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) 3. Control Buttons and Functions 3.1 User Control Buttons There is a power button located at the lower center of the front panel, as well as an LED for power status indication as shown below.

  • Page 10: Power Led

    LED is in amber, it indicates the monitor is at a power saving state. 3.3 Tilting the Display CML155XW has a tilt feature that allows you to tilt the display back and forth or swivel the display left and right to find the most comfortable viewing position. To tilt the display, grasp the sides and push the display back or pull it toward you until it is in the desired position.

  • Page 11: Disassembly Instructions

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) 4. Disassembly Instructions To disassembly the monitor, follow the steps as below: 1) Face Down the Monitor. Note: Place the monitor face down on a smooth surface covered by soft material to protect the panel faceplate.
  • Page 12 HITACHI CML155XW LCD Monitor Service Manual (v1.0) 4) PCB Assembly Removal: Caution: When serving or replacing the panel, disconnect the DC power jack completely. (a) Unplug all connected wires from the PCB. (b) Remove 3 screws indicated as “C” from the inverter board, and then remove the board carefully.

  • Page 13: General Connection And Applications

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) 5. General Connection and Applications Procedures for installing and using this CML155XW LCD monitor are described as below. 5.1 Connecting the monitor to a computer 1) Place the display on a flat, sturdy surface. Choose an area free from excessive heat, moisture, and sunlight.
  • Page 14 HITACHI CML155XW LCD Monitor Service Manual (v1.0) Pin Assignment of 15-pin D-SUB connector Red Video +5V for DDC circuit Green Video Logic Ground Blue Video Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync. Red Ground V-Sync. Green Ground DDC-Serial Clock...

  • Page 15: Connecting The Monitor To The Av Device

    HITACHI CML155XW LCD Monitor Service Manual (v1.0) Audio 1 jack 5) First turn the PC power switch ON. Then apply power to the display by pressing the power button to turn the monitor on. The power indicator LED will then illuminate.
  • Page 16 HITACHI CML155XW LCD Monitor Service Manual (v1.0) Pin Assignment of 4-pin mini-din connector Y_in C_in 2) Connect the audio cable to the speaker input jack on the back of the display (labeled audio 2): Audio 2 jack...

  • Page 17: Electronic Circuit Description

    The supply voltage of I014 (i.e., VCC at pin 8) is either from P009 pin 9 while CML155XW V is powered off (the power plug of AC adapter is completely disconnected from the power jack of CML155XW V) or from 5V source.
  • Page 18 HITACHI CML155XW LCD Monitor Service Manual (v1.0) for the purpose of plug-and-play (P&P) functionality. The power supply of I013 is from pin 14 (labeled DDC+5VDC) of P008. (3) Memory Interface Refer to circuit diagram titled ‘Frame Store’ in Appendix B.
  • Page 19 HITACHI CML155XW LCD Monitor Service Manual (v1.0) BKLT_PWM is used as backlight brightness control. BKLT_EN controls the backlight’s on/off. And LCD_ON/OFF is used for turning on or off the LCD panel. (6) Power Refer to circuit diagram titled ‘POWER’ in Appendix B.
  • Page 20 HITACHI CML155XW LCD Monitor Service Manual (v1.0) 7. Troubleshooting Flow Chart For troubleshooting the monitor, please refer to “troubleshooting flow chart” in Appendix F. 8 Proposed Repair Parts List For proposed repair parts list please refers to the Appendix G.
  • Page 21 Appendix A CML155XW Main Board Block Diagram...
  • Page 22 CML155XW Main Board Block Diagram +2.5V +12V DC Power XTAL SDRAM +3.3V Supply +12V EDID Gm5020 EPROM TMDS EDID DIGITAL VIDEO EPROM SCALER 292 pin PBGA Package VIDEO DECODER EPROM INVERTER Keypad MICROCONTROLLER Audio input 1 Speaker/Earphone AUDIO Audio Amplifier...
  • Page 23 Appendix B CML155XW Main Board Circuits...

  • Page 30: Audio Board Circuit

    Appendix C CML155XW Audio Board Circuit...

  • Page 32: Keyboard Circuit

    Appendix D CML155XW Key Board Circuit...

  • Page 34: Inverter Circuit

    Appendix E CML155XW Inverter Board Circuit...

  • Page 36: Troubleshooting Flow Chart

    Appendix F CML155XW Troubleshooting Flow Charts...
  • Page 37 No picture Appear Replace F001 Does the LED The Voltage of light up L006 is 12V LED display is amber The Voltage of Replace F002 I012 #1 is 12V Reset the MCU(I006) Picture by pushing the power shows Is it entering into key or replugging the power saving mode DC 12V cable...
  • Page 38 The Ver. Or Hor. Sync. Does not hold Are two flex cables Tighten two flex Are the output of Are two flex cables attached firmly at cables at P010 & GM5020(CLK,H,V, attached firmly at the LCD panel DE) normal P010 & P011 P011 connectors Tighten two flex...

  • Page 39: Repair Parts List

    Appendix G CML155XW Repair Parts List...
  • Page 40 THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA...

  • Page 41: Mechanical Disassembly

    Appendix H CML155XW Mechanical Disassembly...
  • Page 43 Appendix I CML155XW Printed Circuit Boards...
  • Page 48 Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: csgswe@hitachi-eu.com Fax: +39 02 48786381/2 Email: customerservice.italy@hitachi-eu.com 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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