Hitachi CML200UXWB Service manual

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.

No. 0534

CML200UXWB

Data contained within this Service manual is subject to alteration for improvement.

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.

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.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LCD MONITOR

July 2002

ABLE OF

1. Precaution and Notices ………….… …………………………………… 3

1.1 Safety Precaution ………….………………………………………. 3

1.2 Product Safety Notice ……………………………………………… 3

1.3 Service Notes ………………………………………………………. 3

2. Specifications ………….……………………………...………………… 4

2.1 Monitor Specifications ……..………………………………………. 5

2.2 Timing Supported – Analog Inputs ..………………………………. 5

2.2 Timing Supported – Digital Input s ..……………………………….. 6

3. Adjusting Your Display ...........…………………………………………. 7

4. Disassembly Instr uctions ……………………………………………….. 8

5. General Connection and Applic ations ………………………………….. 11

ONTENTS

5.1 Connecting the Monitor to the Computer ………………………….. 11

6. Electronic Circuit Description ………………………………………….. 13

7. Electronic Block Diagram ………………………………………………. 14

8. Troubleshooting Flow Chart……………………………………… ……. 15

Appendix A. PCB Circuit Appendix B. PCB Layout Appendix C. Parts Lists Appendix D. Mechanical Disassembly

1. Precautions and Notices

1.1 Safety Precautions

Although LCD monitors are displays without high voltage as that 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.

2) Operation of these displays outside the cabinet or with the cover removed involves a shock hazard from the display backlight’s inverter. Work on the display should not be attempted by anyone who is not thoroughly familiar with precautions necessary when working on high voltage equipment.

3) Before returning a serviced display to the customer, a thorough safety test must be performed to verify that the display is safe to operate without danger or shock.

1.2 Product Safety Notice

1) Many electrical and mechanical parts in this chassis provide special visual safety protection. The protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.

2) Before replacing any of these components, read the parts list manual carefully. The use of substitute replacement parts, which do not have the same safety characteristics, as specified in the parts list may create shock, fire or other hazards.

1.3 Service Notes

1) When replacing parts or circuit boards, wrap the wires around terminals before soldering.

2) Keep wires away from high temperature components.

3) Keep cable and their shielding in their original position so as to reduce interference.

2. Specifications

2.1 Monitor Specification

LCD Module 20.1-in, active matrix TFT, anti-glare coating, 0.255 mm pixel pitch Display Size 408 mm x 306 mm Viewing Angle

Left/Right Up/Down

85° / 85°(T ypical) 85° /85°(T ypical)

Luminance Contrast Ratio

Display Colors 16.7 million Power Input 100 ~ 240 VAC Full Range, 50/60 Hz (External AC adapter) Maximum power

consumption Signal Input

Video Signal Sync signals

Line (horizontal) frequency

Raster (vertical) frequency

Pixel dot clock 162 MHz (maximum)

250 cd/m2 (Typical) 500 : 1 (Typical)

< 70W

Analog:RGB positive 0.7VPP, 75ohm Separate & Composite, TTL Level Digital:TMDS 0.3Vp-p differential

Analog:31.5 kHz ~ 80 kHz / Digital :31.5kHz ~ 75kHz

Analog:56 Hz ~ 75 Hz / Digital :60Hz~75Hz

Recommended mode 1600 x 1200 @ 60 Hz Pedestal tilt

Pedestal swivel Dimensions

(W x H x D) Weight 11 kg

Operating Conditions

Temperature Humidity

Altitude

Storage Conditions

Temperature Humidity

15° forward, -5°backward 45° right ,45° left

494 x 448 x 224 mm (without speaker)

5° ~ 40°C at altitude 0 ~ 2000m 5° ~ 30°C at altitude 2000 ~ 3000m 20% ~ 85% RH, non-condensing 3000m Max.

-20° ~ 60°C 5% ~ 85% RH

Altitude 10000m Max.

2.2 Analog Inputs

Mode

No.

1 VGA 60HZ

2 VGA 72HZ

3 VGA 75HZ

4 SVGA 56HZ

5 SVGA 60HZ

6 SVGA 72HZ

7 SVGA 75HZ

8 XGA 60HZ

9 XGA 70HZ

10 XGA 75HZ

11 SXGA 60HZ

12 SXGA 75HZ

13 UXGA 60Hz

14 MAC SVGA

15 MAC SVGA

16 US TEXT

Mode Name

Resolution

640*480

800*600

1024*768

1280*1024

1600 * 1200

640*480

832*624

720*400

H.Freq.(KHZ)

V.Freq.(HZ)

31.469

59.941

37.804

72.81

37.5

75.0

35.156

56.25

37.879

60.317

48.077

72.188

46.875

75.0

48.363

60.004

56.476

70.069

60.023

75.029

63.981

60.020

79.976

75.025

75.0 60

35.0

66.667

493725

74.550

31.469

70.087

H. Polarity

V. Polarity

－－－－－－＋＋＋＋＋＋＋＋－－－－＋＋＋＋＋＋＋＋－－－－－＋

Pixel CLK

(MHZ)

25.175

31.5

36.0

40.0

50.0

49.5

65.0

75.0

78.75

108

135

162

30.24

57.283

28.322

2.3 Digital Input:

Mode

No.

Mode Name

Resolution

H.Freq.(KHZ)

V.Freq.(HZ)

H. Polarity

V. Polarity

Pixel CLK

(MHZ)

1 VGA 60HZ

640*480

2 VGA 75HZ

640*480

3 SVGA 60HZ

800*600

4 SVGA 75HZ

800*600

5 XGA 60HZ

1024*768

6 SXGA 60HZ

1280*1024

7 US TEXT

720*400

8 UXGA 60Hz

1600 * 1200

31.469

59.941

37.5

75.0

37.879

60.317

46.875

75.0

48.363

60.004

63.981

60.020

31.469

70.087

75.0 60

－－－－＋＋＋＋－－＋＋－＋＋＋

25.175

31.5

40.0

49.5

65.0

108

28.322

162

Note:

The display is capable of going beyond these recommended modes.

3. Adjusting Your Display

This chapter contains information about how to changing display settings for your LCD Monitor. It is designed with an OSD menu to help you easily adjust to its optimum performance.

Note: You must perform auto setup before making any adjustment.

Summary of Control Buttons

There are three control buttons located at the lower part of the front panel of your display:

 Select: Display the On-Screen Display (OSD) “Main Menu” and selects items for user

adjustment.

Note: Hold down this key for 2 seconds will clear OSD menu.

 Right( ): Move upward through the choice in the OSD submenu. If an adjustment

bar is displayed, this button increases the setting value.

Note: This key is also used as ‘direct key’ to bring-up OSD “Audio/Video”.

 Left( ): Move downward through the choice in the OSD submenu. If an adjustment

bar is displayed, this button decreases the setting value.

ENGLISH

Note: This key is also used as ‘direct key’. When the OSD “Main Menu” is inactive,

press this key will bring-up ‘Auto Setup’ submenu.

Displaying the OSD “Main Menu”

You can use the OSD features to change the screen settings of your display. To display

the OSD “Main Menu”, please press the ‘Select’ button.

Brightness

  100

4. Disassembly Instructions

To disassembly the monitor, follow the steps as below:

1) Face Down the Monitor.

Note:

Face the monitor down on a smooth plane with a soft material on that plane to protect the panel faceplate.

2) Hinge Cover and base Removal

As below, remove the hinge cover and the 4 screw “B” then remove the base “C”.

3) Back Cover Removal:

As below, after removing the base, there will be 7 screws (indicated by “D”), and remove them. Then you can remove the back covere “E” of the monitor.

4) Metallic Cover Removal:

Remove 12 screws indicated as “F” from the back metallic cover. Then remove the back metallic cover “G”.

5) PCB Assembly Removal: Caution:

(a) Unplug all connected wires from the PCB. (b) Remove 4 screws indicated as “H” from the audio board, and then remove the board

When serving or replacing the panel, disconnect the DC power jack completely.

carefully.

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