NEC MultiSync LCD1550ME, MultiSync LCD1550ME(B), MultiSync LCD1550ME-BK(B) Service Manual

Download

COLOR MONITOR

MultiSync



LCD1550ME

MODELS LCD1550ME (B) / -BK(B)

200206 08EK1ABD 08EK2ABD

SERVICE MANUAL

PART NO. 599910589

NEC-MITSUBISHI ELECTRIC VISUAL SYSTEMS CORPORATION

JUNE 2002

WARNING

The SERVICE PERSONNEL should have the appropriate technical training, knowledge and experience necessary to:

• Be familiar with specialized test equipment, and

• Be careful to follow all safety procedures to minimize danger to themselves and their coworkers.

To avoid electrical shocks, this equipment should be used with an app ropriate power cord. This equipment utilized a micro-gap power switch. Turn off the set by first pushing power switch. Next,

remove the power cord from the AC outlet. To prevent fire or shock hazards, do not expose this unit to rain or moisture. This symbol warns the personnel that un-insulated voltage within the unit may have sufficient magnitude to cause electric shock.

This symbol alerts the personnel that important literature concerning the operation and maintenance of this unit has been included. Therefore, it should be read carefully in order to avoid any problems.

PRODUCT SAFETY CAUTION

1. When parts replacement is required for servicing, always use the manufacturer's specified replacement.

2. When replacing the component, always be certain that all the components are put back in the place.

3. As for a connector, pick and extract housing with fingers properly since a disconnection and improper contacts may occur, when wires of the connector are led.

4. Use a proper screwdriver. If you use screwdriver that does not fit, you may damage the screws.

CONTENTS

Page No.

USER'S MANUAL ------------------------------------------------------------------- 1-1

SERIAL NUMBER INFORMATION --------------------------------------------- 2-1

DISASSEMBLY ----------------------------------------------------------------------- 3-1

ADJUSTMENT PROCEDURES -------------------------------------------------- 4-1

INSPECTION --------------------------------------------------------------------------- 5-1

TROUBLE SHOOTING ------------------------------------------------------------- 6-1

CIRCUIT DESCRIPTION ----------------------------------------------------------- 7-1

REPLACEMENT PARTS LIST --------------------------------------------------- 8-1

BLOCK DIAGRAM ------------------------------------------------------------------- 9-1

SCHEMATIC DIAGRAMS -------------------------------------------------------- 10-1

1-1

User's Manual

MultiSync LCD1550ME

User’s Manual

1-2

English-1

English

TO PREVENT FIRE OR SHOCK HAZARDS, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. ALSO, DO NOT USE THIS UNIT’S POLARIZED PLUG WITH AN EXTENSION CORD RECEPTACLE OR OTHER OUTLETS UNLESS THE PRONGS CAN BE FULLY INSERTED. REFRAIN FROM OPENING THE CABINET AS THERE ARE HIGH VOLTAGE COMPONENTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

CAUTION

TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

This symbol warns user that uninsulated voltage within the unit may have sufficient magnitude to cause electric shock. Therefore, it is dangerous to make any kind of contact with any part inside this unit.

This symbol alerts the user that important literature concerning the operation and maintenance of this unit has been included. Therefore, it should be read carefully in order to avoid any problems.

CAUTION

WARNING

RISK OF ELECTRIC SHOCK • DO NOT OPEN

Caution:

When operating the MultiSync LCD1550ME (L15XA231-BN and L15XA231-BNBK) with a 220-240V AC power source in Europe, use the power cord provided with the monitor.

In the UK, a BS approved power cord with a moulded plug has a Black (five Amps) fuse installed for use with this equipment. If a power cord is not supplied with this equipment please contact your supplier.

When operating the MultiSync LCD1550ME with a 220-240V AC power source in Australia, use the power cord provided with the monitor.

For all other cases, use a power cord that matches the AC voltage of the power outlet and has been approved by and complies with the safety standard of your particular country.

ENERGYSTA R is a U.S. trademark. As an ENERGYSTAR® Partner, NEC-Mitsubishi Electronics Display of America, Inc. has

determined that this product meets the ENERGYSTA R guidelines for energy efficiency. The ENERGYSTAR emblem does not represent EPA endorsement of any product or service.

IBM PC/XT/AT, PS/2, MCGA, VGA, 8514/A and XGA are registered trademarks of International Business Machines Corporation.

Apple and Macintosh are registered trademarks of Apple Computer Inc.

Microsoft and Windows are registered trademarks of the Microsoft Corporation.

NEC is a registered trademark of NEC Corporation.

All other trademarks or registered trademarks are property of their respective owners.

1-3

English-2

Declaration

Declaration of the Manufacturer

We hereby certify that the colour monitor

MultiSync LCD1550ME (L15XA231-BN) MultiSync LCD1550ME (L15XA231-BNBK)

is in compliance with

Council Directive 73/23/EEC:

– EN 60950

Council Directive 89/336/EEC:

– EN 55022 – EN 61000-3-2 – EN 61000-3-3 – EN 55024

and marked with

NEC-Mitsubishi Electric Visual Systems, Corp.

MS Shibaura Bldg., 13-23,

Shibaura 4-chome,

Minato-Ku, Tokyo 108-0023, Japan

1-4

English-3

English

For the Customer to use in U.S.A. or Canada

Canadian Department of Communications Compliance Statement

DOC: This Class B digital apparatus meets all requirements of the

Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouiller du Canada.

C-UL: Bears the C-UL Mark and is in compliance with Canadian Safety Regulations according to CSA C22.2 #950. Ce produit porte la marque ‘C-UL’ et se conforme aux règlements de sûrele Canadiens selon CAN/CSA C22.2 No. 950.

FCC Information

1. Use the attached specified cables with the MultiSync LCD1550ME colour monitor so as not to interfere with radio and television reception.

(1)The power supply cord you use must have been approved by and

comply with the safety standards of U.S.A., and meet the following condition.

Power supply cord Non shield type, 3-conductor

Length 2.0 m

Plug shape

(2)Shielded video signal cable. Use of other cables and adapters

may cause interference with radio and television reception.

1-5

English-4

2. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that

to which the receiver is connected.

• Consult your dealer or an experienced radio/TV technician for help.

If necessary, the user should contact the dealer or an experienced radio/television technician for additional suggestions. The user may find the following booklet, prepared by the Federal Communications Commission, helpful: “How to Identify and Resolve Radio-TV Interference Problems.” This booklet is available from the U.S. Government Printing Office, Washington, D.C., 20402, Stock No. 004-000-00345-4.

Declaration of Conformity

This device complies with Part 15 of FCC Rules. Operation is subject to the following two conditions. (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

U.S. Responsible party: NEC-Mitsubishi Electronics

Display of America, Inc.

Address: 1250 N. Arlington Heights Road

Itasca, Illinois 60143-1248

Tel. No.: (630)467-3000

Type of Product: Computer Monitor

Equipment Classification: Class B Peripheral

Models: MultiSync LCD1550ME

We hereby declare that the equipment specified above conforms

to the technical standards as specified in the FCC Rules.

1-6

English-5

English

Contents

Your new NEC MultiSync LCD monitor box* should contain the following:

• MultiSync LCD1550ME monitor with tilt base

• Power Cord

• Video Signal Cable

• Audio Cable

• User’s Manual

• CD ROM (includes complete User’s Manual in PDF format). To see the User’s Manual, Acrobat Reader 4.0 must be installed on your PC.

* Remember to save your original box and packing material to transport

or ship the monitor.

1550ME

User’s Manual

CD ROMVideo Signal CableAudio Cable

Power Cord

1-7

English-6

Quick Start

To attach the MultiSync LCD monitor to your system, follow these instructions:

1. Turn off the power to your computer.

2. Remove connector cover and cable cover. Connect the audio cable to “AUDIO INPUT” on the back of the monitor and the other end to the “Audio out” terminal of the computer. Place the Audio cable under Clip B (Figure A.1).

3. For PC: Connect the 15-pin mini D-SUB of the appropriate signal cable to the connector for the display card in your system (Figure B.1). Tighten all screws.

For Mac: Connect the MultiSync LCD1550ME Macintosh cable adapter to the computer (Figure C.1). Attach the 15-pin mini D-SUB end of the appropriate signal cable to the MultiSync LCD1550ME Macintosh cable adapter (Figure C.1). Tighten all screws.

4. Connect the 15-pin mini D-SUB of the video signal cable to the appropriate connector on the back of the monitor (Figure D.1). Place the Video Signal Cable under Clip B.

5. Headphones may be connected to the “Headphones” output on the front of the monitor’s bezel marked “

” (Figure E.1). While the headphones are connected, the sound from the speakers will be disabled. Headphones can be purchased from your local electronics store.

6. Connect one end of the power cord to the MultiSync LCD Series monitor and the other end to the power outlet. Place the video signal cable and AC power cord under the clips (Figure D.1). Replace connector cover and cable cover.

NOTE: Adjust the position of the cable under the clips to avoid damage

for cable or monitor.

NOTE: Please refer to Caution section of this manual for proper

selection of AC power cord.

7. The Vacation Switch on the left side of the monitor must be turned on (Figure F.1). Turn on the monitor with the Power Button and the computer.

1-8

English-7

English

NOTE: The Vacation Switch is a true on/off switch. If this switch is on

the OFF position, the monitor cannot be turned on using the front button. DO NOT switch on/off repeatedly.

8. No-touch auto adjust automatically adjusts the monitor to optimal settings upon initial setup for most timings. For further adjustments, use the following OSM controls:

• Auto Adjust Contrast

• Auto Adjust

Refer to the Controls section of this User’s Manual for a full description of these OSM controls.

NOTE: If you have any problems, please refer to the Troubleshooting

section of this User’s Manual.

Figure C.1

Macintosh Cable Adapter (not included)

Macintosh G3 and G4 do not need a Macintosh cable adapter

Figure B.1

Figure A.1

Clip B

1-9

English-8

Vacation Switch

Power Button

Figure E.1

Figure D.1

1550ME

Figure F.1

Connector cover

Cable cover

Clip B

1-10

English-9

English

Tilt

Grasp both sides of the monitor screen with your hands and adjust the tilt as desired (Figure TS.1).

Remove Monitor Stand for Mounting

To prepare the monitor for alternate mounting purposes:

1. Remove the connector cover and cable cover (Figure R.1).

2. Disconnect all cables.

3. Place monitor face down on a non-abrasive surface (Figure R.2).

4. Remove the 4 screws connecting the monitor to the stand and lift off the stand assembly (Figure R.2) the monitor is now ready for mounting in an alternate manner.

5. Connect the AC cord, signal cable and audio cable to the back of the monitor (Figure R.3).

6. Reverse this process to reattach stand.

NOTE: Use only VESA-compatible alternative mounting method.

Figure TS.1

1-11

English-10

Figure R.1

Figure R.2

Figure R.3

Non-abrasive

surface

1-12

English-11

English

7. This LCD monitor is designed for use with a flexible arm. Please use the attached screws (4pcs) when mounting. To meet the safety requirements the monitor must be mounted to an arm which guaranties the necessary stability under consideration of the weight of the monitor. The LCD monitor shall only be used with an approved arm (e.g. GS mark).

4 SCREWS (MAX depth: 8.6 mm) If use other screw, check depth of hole.

Weight of LCD assembly: 3.1kg (MAX)

Replace screws

Tighten all screws

Thickness of bracket (arm)

2.0 ~ 3.2 mm

75 mm

1-13

English-12

Sound

VOLUME

Control the sound volume of speakers and headphones.

Brightness/Contrast Controls

BRIGHTNESS

Adjusts the overall image and background screen brightness.

Exits the OSM controls. Exits to the OSM main menu.

Moves the highlighted area left/right to select control menus. Moves the highlighted area up/down to select one of the controls.

Moves the bar left/right to increase or decrease the adjustment. Activates Auto Adjust function. Enter the sub menu.

Moves the highlighted area of main menu right to select one of the controls.

Resets the highlighted control to the factory setting. When no OSM menu is shown, the speaker sound will be muted.

Controls

OSM (On-Screen-Manager) Controls

The OSM controls on the front of the monitor function as follows: To access OSM press any of the control buttons ( , , -, +, NEXT).

NOTE: When RESET is pressed in the main and sub-menu, a warning

window will appear allowing you to cancel the RESET function by pressing the EXIT button.

Control

EXIT

CONTROL /

ADJUST -/+

RESET/MUTE

1-14

English-13

English

CONTRAST

Adjusts the image brightness in relation to the background.

AUTO ADJUST

Adjusts the image displayed for non-standard video inputs.

Auto Adjust

Automatically adjusts the Image Position, the H. Size and Fine setting.

Position Controls

LEFT/RIGHT

Controls Horizontal Image Position within the display area of the LCD.

DOWN/UP

Controls Vertical Image Position within the display area of the LCD.

H. SIZE

Adjusts the horizontal size by increasing or decreasing this setting.

FINE

Improves focus, clarity and image stability by increasing or decreasing this setting.

Colour Control Systems

Five colour presets select the desired colour setting. Each colour setting is adjusted at the factory.

R,G,B

Increases or decreases Red, Green or Blue colour depending upon which is selected. The change in colour will appear on screen and the direction (increase or decrease) will be shown by the bars.

1-15

English-14

Tools

OSM POSITION

You can choose where you would like the OSM control image to appear on your screen. Selecting OSM Location allows you to manually adjust the position of the OSM control menu left, right, down or up.

OSM TURN OFF

The OSM control menu will stay on as long as it is use. In the OSM Turn Off submenu, you can select how long the monitor waits after the last touch of a button to shut off the OSM control menu. The preset choices are 10, 20, 30, 45, 60 and 120 seconds.

OSM LOCK OUT

This control completely locks out access to all OSM control functions. When attempting to activate OSM controls while in the Lock Out mode, a screen will appear indicating the OSM controls are locked out. To activate the OSM Lock Out function, press , then and hold down simultaneously. To de-activate the OSM Lock Out, press , then and hold down simultaneously.

RESOLUTION NOTIFIER

This optimal resolution is 1024 x 768. If ON is selected, a message will appear on the screen after 30 seconds, notifying you that the resolution is not at 1024 x 768.

FACTORY PRESET

Selecting Factory Preset allows you to reset all OSM control settings back to the factory settings. The RESET button will need to be held down for several seconds to take effect. Individual settings can be reset by highlighting the control to be reset and pressing the RESET button.

Information

DISPLAY MODE

Indicates the current display resolution and frequency setting of the monitor.

1-16

English-15

English

MONITOR INFO.

Indicates the model and serial numbers of your monitor.

OSM Warning

OSM Warning menus disappear with Exit button.

NO SIGNAL: This function gives a warning when there is no signal present. After power is turned on or when there is a change of input signal or video is inactive, the

No Signal window will appear. RESOLUTION NOTIFIER: This function gives a

warning of use with optimized resolution. After power is turned on or when there is a change of input signal or the video signal doesn’t have proper resolution, the Resolution Notifier window will open. This function can be disabled in the TOOL menu.

OUT OF RANGE: This function gives a recommendation of the optimized resolution and refresh rate. After the power is turned on or there is a change of input signal or the video signal doesn’t have proper timing, the Out Of

Range menu will appear.

CHECK CABLE: This function will advise you to check

all Video Inputs on the monitor and computer to make sure they are properly connected.

1-17

English-16

Recommended Use

Safety Precautions and Maintenance

FOR OPTIMUM PERFORMANCE, PLEASE NOTE

THE FOLLOWING WHEN SETTING UP AND

USING THE MULTISYNC LCD COLOUR MONITOR:

• DO NOT OPEN THE MONITOR. There are no user serviceable parts inside and opening or removing covers may expose you to dangerous shock hazards or other risks. Refer all servicing to qualified service personnel.

• Do not spill any liquids into the cabinet or use your monitor near water.

• Do not insert objects of any kind into the cabinet slots, as they may touch dangerous voltage points, which can be harmful or fatal or may cause electric shock, fire or equipment failure.

• Do not place any heavy objects on the power cord. Damage to the cord may cause shock or fire.

• Do not place this product on a sloping or unstable cart, stand or table, as the monitor may fall, causing serious damage to the monitor.

• Do not place any objects onto the monitor and do not use the monitor outdoors.

• The inside of the flourescent tube located within the LCD monitor contains mercury. Please follow the bylaws or rules of your municipality to dispose of the tube properly.

Immediately unplug your monitor from the wall outlet and refer servicing to qualified service personnel under the following conditions:

• When the power supply cord or plug is damaged.

• If liquid has been spilled, or objects have fallen into the monitor.

• If the monitor has been exposed to rain or water.

• If the monitor has been dropped or the cabinet damaged.

• If the monitor does not operate normally by following operating instructions.

• Do not bend power cord.

• Do not use monitor in high temperatured, humid, dusty, or oily areas.

• Do not cover vent on monitor.

• If monitor is broken, do not come in contact with the liquid crystal.

• If glass is broken. Handle with care.

1-18

English-17

English

CAUTION

• Allow adequate ventilation around the monitor so that heat can properly dissipate. Do not block ventilated openings or place the monitor near a radiator or other heat sources. Do not put anything on top of monitor.

• The power cable connector is the primary means of detaching the system from the power supply. The monitor should be installed close to a power outlet which is easily accessible.

• Handle with care when transporting. Save packaging for transporting.

CORRECT PLACEMENT AND ADJUSTMENT OF

THE MONITOR CAN REDUCE EYE, SHOULDER

AND NECK FATIGUE. CHECK THE FOLLOWING

WHEN YOU POSITION THE MONITOR:

• For optimum performance, allow 20 minutes for warm-up.

• Adjust the monitor height so that the top of the screen is at or slightly below eye level. Your eyes should look slightly downward when viewing the middle of the screen.

• Position your monitor no closer than 40 cm and no further away than 70 cm from your eyes. The optimal distance is 53 cm.

• Rest your eyes periodically by focusing on an object at least 6 m away. Blink often.

• Position the monitor at a 90° angle to windows and other light sources to minimize glare and reflections. Adjust the monitor tilt so that ceiling lights do not reflect on your screen.

• If reflected light makes it hard for you to see your screen, use an antiglare filter.

• Clean the LCD monitor surface with a lint-free, non-abrasive cloth. Avoid using any cleaning solution or glass cleaner!

• Adjust the monitor’s brightness and contrast controls to enhance readability.

• Use a document holder placed close to the screen.

• Position whatever you are looking at most of the time (the screen or reference material) directly in front of you to minimize turning your head while you are typing.

1-19

English-18

• Avoid displaying fixed patterns on the monitor for long periods of time to avoid image persistence (after-image effects).

• Get regular eye checkups.

Ergonomics

To realize the maximum ergonomics benefits, we recommend the following:

• Use the preset Size and Position controls with standard signals.

• Use the preset Colour Setting.

• Use non-interlaced signals with a vertical refresh rate between 60-75 Hz.

• Do not use primary colour blue on a dark background, as it is difficult to see and may produce eye fatigue to insufficient contrast.

1-20

English-19

English

16,777,216

31.5 kHz to 60.0 kHz

56.2 Hz to 75.1 Hz

720 x 400*1 :VGA text 640 x 480*1 at 60 Hz to 75 Hz 800 x 600*1 at 56 Hz to 75 Hz 832 x 624*1 at 75 Hz 1024 x 768*2 at 60 Hz to 75 Hz

304 mm/12 inches 228 mm/9.0 inches

AC 100-120 V/220-240 V 50/60 Hz

0.7 A @ 100-120 V, 0.35 A @ 220-240 V

Monitor Specifications

LCD Module Diagonal:

Viewable Image Size:

Native Resolution (Pixel Count):

Display Colours Analog input:

Synchronization Range Horizontal:

Vertical:

Resolutions Supported

Active Display Horizontal: Area Vertical:

Power Supply

Input Signal Video:

Sync:

Current Rating

MultiSync LCD1550ME Monitor

38 cm/15 inches 38 cm/15 inches 1024 x 768

ANALOG 0.7 Vp-p/75 Ohms Separate sync.TTL Level Horizontal sync. Positive/Negative Vertical sync. Positive/Negative

Notes

Active matrix; thin film transistor (TFT) liquid crystal display (LCD);

0.30 mm dot pitch; 250cd/m2 white luminence, typical; 400:1 contrast ratio, typical.

Depends on display card used.

Automatically Automatically

Some systems may not support all modes listed.

Dependent upon signal timing.

Specifications

Viewing Angle Left/Right:

Up/Down:

± 60° + 45°/- 55°

345.2 mm (W) x 362.6 mm (H) x 162.0 mm (D)

13.6 inches (W) x 14.3 inches (H) x 6.4 inches (D)

5 °C to 35 °C 30% to 80% 0 to 3,000 m

-10 °C to +60 °C 10% to 85% 0 to 9,500 m

Dimensions

Weight

Environmental Considerations

Operating Temperature:

Humidity:

Altitude:

Storage Temperature:

Humidity:

Altitude:

3.9 kg (8.6 lbs)

Speakers Practical Audio Output

1.0W + 1.0W

1-21

English-20

*1 Interpolated Resolutions: When resolutions are shown that are lower than the pixel count of the

LCD module, text may appear different. This is normal and necessary for all current flat panel technologies when displaying non-native resolutions full screen. In flat panel technologies, each dot on the screen is actually one pixel, so to expand resolutions to full screen, an interpolation of the resolution must be done. *2 NEC-Mitsubishi Electronics Display cites recommended resolutions at 75 Hz for optimal display performance.

NOTE: Technical specifications are subject to change without notice.

1-22

English-21

English

Features

Colour Control System: Allows you to adjust the colours on your

screen and customize the colour accuracy of your monitor to a variety of standards.

Reduced Footprint: Provides the ideal solution for environments requiring superior image quality but with size and weight limitations. The monitor’s small footprint and low weight allow it to be moved or transported easily from one location to another.

OSM (On-Screen Manager) Controls: Allow you to quickly and easily adjust all elements of your screen image via simple to use on-screen menus.

No-touch Auto Adjust: No-touch auto adjust automatically adjusts the monitor to optimal settings upon initial setup.

ErgoDesign Features: Enhance human ergonomics to improve the working environment, protect the health of the user and save money. Examples include OSM controls for quick and easy image adjustments, tilt base for preferred angle of vision, small footprint and compliance with MPRII and TCO guidelines for lower emissions.

Plug and Play: The Microsoft solution with the Windows 95/98/ME/ 2000/XP operating system facilitates setup and installation by allowing the monitor to send its capabilities (such as screen size and resolutions supported) directly to your computer, automatically optimizing display performance.

IPM (Intelligent Power Manager) System: Provides innovative power-saving methods that allow the monitor to shift to a lower power consumption level when on but not in use, saving two-thirds of your monitor energy costs, reducing emissions and lowering the air conditioning costs of the workplace.

Multiple Frequency Technology: Automatically adjusts monitor to the display card’s scanning frequency, thus displaying the resolution required.

FullScan Capability: Allows you to use the entire screen area in most resolutions, significantly expanding image size.

1-23

English-22

VESA Standard Mounting Interface: Allows users to connect their

MultiSync monitor to any VESA standard (75 mm pitch) third party mounting arm or bracket. Allows for the monitor to be mounted on a wall or an arm using any third party compliant device.

1-24

English-23

English

Troubleshooting

No picture

• The signal cable should be completely connected to the display card/ computer.

• The display card should be completely seated in its slot.

• Check the Vacation Switch should be in the ON Position. Front power Switch and computer power switch should be in the ON position.

• Check to make sure that a supported mode has been selected on the display card or system being used. (Please consult display card or system manual to change graphics mode.)

• Check the monitor and your display card with respect to compatibility and recommended settings.

• Check the signal cable connector for bent or pushed-in pins.

Power Button does not respond

• Unplug the power cord of the monitor from the AC outlet to turn off and reset the monitor.

• Check the Vacation Switch on the left hand side of the monitor.

Image persistence

• Image persistence is when a “ghost” of an image remains on the screen even after the monitor has been turned off. Unlike CRT monitors, LCD monitors’ image persistence is not permanent. To alleviate image persistence, turn the monitor off for as long as an image was displayed. If an image was on the monitor for one hour and a “ghost” of that image remains, the monitor should be turned off for one hour to erase the image.

NOTE: As with all personal display devices, NEC-Mitsubishi Electronic

Displays recommends using a screen saver at regular intervals whenever the screen is idle.

1-25

English-24

Image is unstable, unfocused or swimming is apparent

• Signal cable should be completely attached to the computer.

• Use the OSM Image Adjust controls to focus and adjust display by increasing or decreasing the fine total. When the display mode is changed, the OSM Image Adjust settings may need to be readjusted.

• Check the monitor and your display card with respect to compatibility and recommended signal timings.

• If your text is garbled, change the video mode to non-interlace and use 60 Hz refresh rate.

Message “OUT OF RANGE” is displayed (screen is either blank or shows rough images only)

• OSM warning “OUT OF RANGE” is displayed on a blank screen: Signal frequency is out of range. Choose one of the supported modes.

LED on monitor is not lit (no green or amber colour can be seen)

• Power Switch should be in the ON position and power cord should be connected.

• Make certain the computer is not in a power-saving mode (touch the keyboard or mouse).

Display image is not sized properly

• Use the OSM Image Adjust controls to increase or decrease the H.Size.

• Check to make sure that a supported mode has been selected on the display card or system being used. (Please consult display card or system manual to change graphics mode.)

Selected resolution is not displayed properly

• Use OSM Display Mode to enter Information menu and confirm that the appropriate resolution has been selected. If not, select corresponding option.

1-26

English-25

English

No Sound

• Check to see if speaker cable is properly connected.

• Check to see if mute is activated.

• Check to see if volume in OSM is set at minimum.

1-27

English-26

TCO’99

This is a translation of the original English TCO'99 document.

MultiSync LCD1550ME White Model (L15XA231-BN)

Congratulations! You have just purchased a TCO’99 approved and labeled product! Your choice has provided you with a product developed for professional use. Your purchase has also contributed to reducing the burden on the environment and also to the further development of environmentally adapted electronics products.

Why do we have environmentally labelled computers?

In many countries, environmental labelling has become an established method for encouraging the adaptation of goods and services to the environment. The main problem, as far as computers and other electronics equipment are concerned, is that environmentally harmful substances are used both in the products and during the manufacturing. Since it has not been possible for the majority of electronics equipment to be recycled in a satisfactory way, most of these potentially damaging substances sooner or later enter Nature.

There are also other characteristics of a computer, such as energy consumption levels, that are important from the viewpoints of both the work (Internal) and natural (external) environments. Since all methods of conventional electricity generation have a negative effect on the environment (acidic and climate-influencing emissions, radioactive waste, etc.), it is vital to conserve energy. Electronics equipment in offices consume an enormous amount of energy since they are often left running continuously.

What does labelling involve?

This product meets the requirements for the TCO’99 scheme which provides for international and environmental labelling of personal computers. The labelling scheme was developed as a joint effort by the TCO (The Swedish Confederation of Professional Employees), Svenska Naturskyddsforeningen (The Swedish Society for Nature Conservation) and Statens Energimyndighet (The Swedish National Energy Administration).

1-28

English-27

English

The requirements cover a wide range of issues: environment, ergonomics, usability, emission of electrical and magnetic fields, energy consumption and electrical and fire safety.

The environmental demands concern restrictions on the presence and use of heavy metals, brominated and chlorinated flame retardants, CFCs (freons) and chlorinated solvents, among other things. The product must be prepared for recycling and the manufacturer is obliged to have an environmental plan which must be adhered to in each country where the company implements its operational policy. The energy requirements include a demand that the computer and/or display, after a certain period of inactivity, shall reduce its power consumption to a lower level in one or more stages. The length of time to reactivate the computer shall be reasonable for the user.

Labelled products must meet strict environmental demands, for example, in respect of the reduction of electric and magnetic fields, physical and visual ergonomics and good usability.

Environmental Requirements

Flame retardants

Flame retardants are present in printed circuit boards, cables, wires, casings and housings. In turn, they delay the spread of fire. Up to thirty percent of the plastic in a computer casing can consist of flame retardant substances. Most flame retardants contain bromine or chloride and these are related to another group of environmental toxins, PCBs, which are suspected to give rise to severe health effects, including reproductive damage in fisheating birds and mammals, due to the bioaccumulative* processes. Flame retardants have been found in human blood and researchers fear that disturbances in foetus development may occur.

TCO’99 demand requires that plastic components weighing more than 25 grams must not contain flame retardants with organically bound chlorine and bromine. Flame retardants are allowed in the printed circuit boards since no substitutes are available.

Lead**

Lead can be found in picture tubes, display screens, solders and capacitors. Lead damages the nervous system and in higher doses, causes lead poisoning.

TCO’99 requirement permits the inclusion of lead since no replacement has yet been developed.

1-29

English-28

Cadmium**

Cadmium is present in rechargeable batteries and in the colourgenerating layers of certain computer displays. Cadmium damages the nervous system and is toxic in high doses.

TCO’99 requirement states that batteries, the colourgenerating layers of display screens and the electrical or electronics components must not contain any cadmium.

Mercury**

Mercury is sometimes found in batteries, relays and switches, Mercury damages the nervous system and is toxic in high doses.

TCO’99 requirement states that batteries may not contain any Mercury. It also demands that no mercury is present in any of the electrical or electronics components associated with the display unit.

CFCs (freons)

CFCs (freons) are sometimes used for washing printed circuit boards. CFCs break down ozone and thereby damage the ozone layer in the stratosphere, causing increased reception on Earth of ultraviolet light with consequent increased risks of skin cancer (malignant melanoma).

The relevant TCO’99 requirement; Neither CFCs nor HCFCs may be used during the manufacturing and assembly of the product or its packaging.

* Bio-accumulative is defined as substances which accumulate within

living organisms.

** Lead, Cadmium and Mercury are heavy metals which are

Bioaccumulative.

To obtain complete information on the environmental criteria document, order from:

TCO Development Unit

SE-114 94 Stockholm SWEDEN FAX Number: +46 8 782 92 07

E-mail (Internet): development@tco.se

You may also obtain current information on TCO’99 approved and labelled products by visiting their website at: http://www.tco-info.com/

1-30

English-29

English

TCO’95

This is a translation of the original English TCO'95 document.

MultiSync LCD1550ME Black Model (L15XA231-BNBK)

Congratulations! You have just purchased a TCO’95 approved and labeled product! Your choice has provided you with a product developed for professional use. Your purchase has also contributed to reducing the burden on the environment and also, to the further development of environmentally adapted electronics products.

Why do we have environmentally labelled computers?

What does labelling involve?

This product meets the requirements for the TCO’95 scheme which provides for international and environmental labelling of personal computers. The labelling scheme was developed as a joint effort by the TCO (The Swedish Confederation of Professional Employees), Naturskyddsforeningen (The Swedish Society for Nature Conservation) and NUTEK (The National Board for Industrial and Technical Development in Sweden).

The requirements cover a wide range of issues: environment, ergonomics, usability, emission of electrical and magnetic fields, energy consumption and electrical and fire safety.

1-31

English-30

Labelled products must meet strict environmental demands, for example, in respect of the reduction of electric and magnetic fields, physical and visual ergonomics and good usability.

TCO’95 is a co-operative project between TCO (The Swedish Confederation of Professional Employees), Naturskyddsforeningen (The Swedish Society for Nature Conservation) and NUTEK (The National Board for Industrial and Technical Development in Sweden).

Environmental Requirements

Brominated flame retardants

Brominated flame retardants are present in printed circuit boards, cables, wires, casings and housings. In turn, they delay the spread of fire. Up to thirty percent of the plastic in a computer casing can consist of flame retardant substances. These are related to another group of environmental toxins, PCBs, which are suspected to give rise to similar harm, including reproductive damage in fisheating birds and mammals, due to the bio-accumulative* processes. Flame retardants have been found in human blood and researchers fear that disturbances in foetus development may occur.

TCO’95 demand requires that plastic components weighing more than 25 grams must not contain organically bound chlorine and bromine.

Lead**

Lead can be found in picture tubes, display screens, solders and capacitors. Lead damages the nervous system and in higher doses, causes lead poisoning.

TCO’95 requirement permits the inclusion of lead since no replacement has yet been developed.

1-32

English-31

English

Cadmium**

Cadmium is present in rechargeable batteries and in the colourgenerating layers of certain computer displays. Cadmium damages the nervous system and is toxic in high doses.

TCO’95 requirement states that batteries may not contain more than 25 ppm (parts per million) of cadmium. The colourgenerating layers of display screens must not contain any cadmium.

Mercury**

Mercury is sometimes found in batteries, relays, switches, and back-light systems, Mercury damages the nervous system and is toxic in high doses.

TCO’95 requirement states that batteries may not contain more than 25 ppm (parts per million) of mercury. It also demands that no mercury is present in any of the electrical or electronics components concerned with the display unit, except the back-light system.

CFCs (freons)

CFCs (freons) are sometimes used for washing printed circuit boards and in the manufacturing of expanded foam for packaging. CFCs break down ozone and thereby damage the ozone layer in the stratosphere, causing increased reception on Earth of ultraviolet light with consequent increased risks of skin cancer (malignant melanoma).

The relevant TCO’95 requirement; Neither CFCs nor HCFCs may be used during the manufacturing of the product or its packaging.

* Bio-accumulative is defined as substances which accumulate within

living organisms.

** Lead, Cadmium and Mercury are heavy metals which are

Bioaccumulative.

To obtain complete information on the environmental criteria document, order from:

TCO Development Unit

SE-114 94 Stockholm SWEDEN FAX Number: +46 8 782 92 07

E-mail (Internet): development@tco.se

You may also obtain current information on TCO’95 approved and labelled products by visiting their website at: http://www.tco-info.com/

2-1

Serial Number Information

Refer to the serial number information shown below.

g g g g g g g g g

Manufactured Year : ( Last digit )

Manufactured Month : January to September 1 to 9 October X November Y December Z

Factory Code:

LITE-ON Taiwan factory ...... “U”

LITE-ON China factory ...... “G”

Control Code:

A: A ver. (for U.S.A.) B: B ver. (for Europe, Asia and Pacific) C: C ver. (for China)

EX.) SERIAL NUMBER LABEL

Model Name : LCD1550ME

LCD1550ME-BK

SERIAL NO. :

Serial Number(5-digit) (sequential numbe

at production month, 00001-99999

)

3-1

DISASSEMBLY

g Before you disassemble the set, turn off power and pull out the power plug. g Use the proper screwdriver. If oversize or undersize screwdriver is used, screws may be damaged. g Assembly is the opposite process of disassembly.

SYMBOL CODE DESCRIPTION CABINET COLOR

1 79PL1836 COVER(CONNECTOR) White 1 79PL1844 COVER-CONNECTOR-NMV(NEC)- Black 2 79PL1825 COVER CABLE White 2 79PL1833 COVER CABLE(LCD1550MBK B) Black 3 --- SCREW-M4*12 4 --- SCREW-T3*12

2 1

3-2

SYMBOL CODE DESCRIPTION CABINET COLOR

5 79PL1897 REAR COVER ASS'Y-NMV-NEC White 5 79PL2043 REAR COVER ASS’Y-NEC-NEC- Black

SYMBOL CODE DESCRIPTION

6 --- BRACKET VESA ASS’Y 7 79PL1915 RUBBER CUSHION(REAR COVER)

3-3

SYMBOL CODE DESCRIPTION

8 --- SCREW-M3*6 9 79PL1910 SHIELD-ASS'Y-NEC-FA150ATU

SYMBOL CODE DESCRIPTION

11 79PL1912 INSULATOR-NEC-FA150ATUA-B 12 79PL1913 INSULATOR-NEC-FA150ATUA-P 13 79PL1911 INSULATOR-NEC-FA150ATUA-P

3-4

SYMBOL CODE DESCRIPTION

14 79PL2044 INTERFACE BD 15 79PL2047 POWER BD 16 79PL1982 INVERTER-DC-AC-AMBIT:T15I

8 --- SCREW-M3*6 17 --- SCREW-M4*8 18 --- SCREW-M3*6(Flat) 19 --- SPECIAL(HEX)

P306 P307

P301

P304

P003

CN2

CN3

CN1

P804

3-5

SYMBOL CODE DESCRIPTION

20 79PL1819 FUNCTION KEY BD-NEC-FA150 21 79PL1901 HEAD PHONE BD-NEC-F A15AA 22 --- SCREW-M3*8 23 79PL1464 SPEAKER 4P N13AA12PCH22 J 24 --- SCREW-M2.6*10 25 79PL1462 SW POWER HF606A1GGATA HUA

SYMBOL CODE DESCRIPTION CABINET COLOR

26 --- SCREW-M3*12 27 79PL2041 FRONT COVER ASS’Y-NMV-NEC White 27 79PL2042 FRONT COVER ASS’Y-NEC-NEC Black

3-6

SYMBOL CODE DESCRIPTION

28 --- SCREW-M3*5 29 --- BRACKET CHASSIS BASE ASS'Y 30 79PL2039 LCD-15-CLAA150XG01-CPT” 31 79PL2036 HARNESS-FFC-45P(0.5)-95/1 32 79PL2037 HARNESS-FFC-30P(0.5)-115/

3-7

SYMBOL CODE DESCRIPTION CABINET COLOR

33 79PL1905 HINGE-L-NEC-NEC-FA150ATUA 34 79PL1906 HINGE-R-NEC-NEC-FA150ATUA 35 79PL1835 STAND FRONT White 35 79PL1845 COVER-STAND FRONT-NMV(NEC Black 36 --- SCREW-M4*8(SPECAL)

SYMBOL CODE DESCRIPTION CABINET COLOR

37 79PL1898 STAND-BASE-NMV-NEC-FA15AA White 37 79PL2040 BASE ASS’Y-NEC-NEC-FA15AA Black 38 79PL1907 BRACKET-HINGE-NEC-FA150AT 39 --- SCREW-M4*16(DOUBLE WASHER)

3-8

SYMBOL CODE DESCRIPTION

40 79PL1875 BRACKET-STAND PLATE-NEC41 79PL1869 FOOT RUBBER 42 --- SCREW-M3*10

4-1

ADJUSTMENT PROCEDURES

TABLE OF CONTENS

Page

Application ------------------------------------------------------------------------------------------------------------- 4-2

Basic operation-------------------------------------------------------------------------------------------------------- 4-2

2.1. General conditions --------------------------------------------------------------------------------------------------- 4-2

2.2. Basic function --------------------------------------------------------------------------------------------------------- 4-2

2.2.1. Key layout ----------------------------------------------------------------------------------------------------------- 4-2

2.2.2. Aging ----------------------------------------------------------------------------------------------------------------- 4-2

2.2.3. Service mode------------------------------------------------------------------------------------------------------- 4-3

Set adjustments------------------------------------------------------------------------------------------------------- 4-4

3.1. Measuring instruments to be used ------------------------------------------------------------------------------- 4-4

3.2. Power source voltage ----------------------------------------------------------------------------------------------- 4-4

3.3. Electrification ---------------------------------------------------------------------------------------------------------- 4-4

3.4. Input signals ----------------------------------------------------------------------------------------------------------- 4-4

3.5. POWER ON and signal input-------------------------------------------------------------------------------------- 4-4

3.6. Manual adjustments ------------------------------------------------------------------------------------------------- 4-5

3.6.1. Input video signal-------------------------------------------------------------------------------------------------- 4-5

3.6.2. VIDEO gain adjustments ---------------------------------------------------------------------------------------- 4-6

3.6.3. Factory setting--------------------------------------------------------------------------------------------------------4-7

4-2

1. Application

This specification shall be applied to the adjustment of the LCD1550ME set.

2. Basic operation

2.1. General conditions

Unless otherwise specified, adjustments shall be carried out under the following conditions:

1) Power source voltage: AC 100 - 120V/ 220 - 240V ± 5%, 50/60Hz

2) Equipment to be used: Equipment that can generate an output of the adjusted VG-819 unit or equivalent

3) Connections: Connections are made to the D-Sub connector of the unit under inspection by means of the connector that can carry each output of the VG-819.

2.2. Basic function

2.2.1. Key layout

Exit : Menu Close, Sub menu exit

Control : Menu Open, Cursor Move, Item Select

Adjust : Menu Open, Adjust select item, Enter Sub menu

Next : Menu Open, Tag Select, Function execute

Reset : Open reset menu, Sound Mute

2.2.2. Aging

Prior to the adjustment of this model, 30 minutes of aging shall be carried out. The method of aging mode setting shall conform to the following:

1) Turn the POWER switch on while there are no inputs of the VIDEO and SYNC signals.

2) Press the (4) RIGHT or(3) LEFT or (+) PLUS or (-) MINUS key to display the information OSM.

3) Then, Press the (+) PLUS and (-) MINUS keys simultaneously with the RESET key kept pressed. Then

the mode moves to the aging mode.

Push (+) PLUS and (-) MINUS and RESET

EXIT wCONTROL8 −ADJUST+ NEXT RESET/MUTE

4-3

4) If there is no particular operation, an all white screen (255/255 gradation) is displayed.

5) Operate the(4) RIGHT and (3)LEFT keys in this state. Then, operation for the gradation becomes

possible. It is also possible to change the pattern by operating the (4)RIGHT and (3)LEFT keys.

6) When withdrawing from the aging mode, press the EXIT key.

During operation in the aging mode, the power save mode is not assumed. The LED maintains the green display.

2.2.3. Service mode

At the time of adjustment of this model, a suggestion may be given to enter the service (factory) mode. This will be explained below.

(1) Service mode:

1) In the “display mode” menu, press the (+) and (−) LEFT keys at the same time while pressing the

RESET key.

2) When the NEXT key is pressed under the condition that the WARNING screen is displayed, the mode moves to the SERVICE mode. At that time, the LED is kept lit in green. The OSM AUTO-OFF function is disabled.

3) When withdrawing from the SERVICE mode, press the EXIT key in the highest hierarchy of the SERVICE menu, or make a signal changeover, or take an action of POWER OFF.

(2) Service menu:

This is an OSM menu to be displayed when the mode is changed over to the SERVICE mode. The conditions differ in each mode, in regard to entering and withdrawal, and whether the data are recorded in the EEPROM. Items of the service menu are used in common.

Push (+) PLUS and (-) MINUS and RESET

4-4

3. Set adjustments

3.1. Measuring instruments to be used

The measuring instruments considered necessary for the adjustment of the LCD1550ME set are specified below.

1) Equipment that can generate an output of the adjusted VG-819 unit or equivalent

3.2. Power source voltage

100 - 120V/ 220 - 240V ± 5%, 50/60Hz

3.3. Electrification

1) Make connections according to the mode intended for VG-819 cable setting.

2) Turn on the POWER switch of the VG-819 unit.

3) Connect an AC power cable to the unit under inspection.

4) Confirm that the vacation switch (seesaw switch) at the left side of the unit being inspected has been moved to the “I” side, and turn the POWER switch ON at the right side of the front.

5) The LED of the unit under inspection is lit in amber. (In the middle of signal discrimination)

6) After the completion of signal discrimination, the LED is lit in green.

Note 1: When the POWER source switch is turned on for the first time, the initialization of EEPROM is

effected regardless of the ON/OFF position of the POWER switch. In this period (about 1 minutes), the POWER switch must not be moved to the ON or OFF position. Upon the completion of the initialization, a normal screen is displayed. (If no signal input is entered, the information OSM is displayed.) If the screen is not displayed for more than 5 minutes after the electrification, however, this seems to have resulted from failure in the initialization of EEPROM. Such a condition is regarded as NG.

Note 2: Connections for the connectors should be carried out always under the condition that the AC

POWER cord plug has been pulled out.

3.4. Input signals

Refer to Paragraph 3.6.1 for each adjustment item.

3.5. POWER ON and signal input

1) Turn on the vacation switch located on the side of the main unit (the power supply for the signal generator turned off) and turn on the power circuit by pressing the POWER key on the front panel. Confirm in this case that the LED is lit in amber. When the power supply is turned on for the first time after the completion of PWB assembly, do not turn off the power supply for at least 10 seconds because initialization is required to be performed.

2) Turn on the power supply of the signal generator and enter an input of Signal 1. Confirm that the LED is turned from amber to green.

* If this LED is not lit in green at that time, it is regarded as a defective LED.

3) Prior to adjustments, execute the factory reset procedure without fail. The method of this action is described below.

a) Display the SERVICE menu and adjust the cursor to the item of [FACTORY RESET].

b) Enter a signal 2 input of VGA 640x480(Solid all white pattern).

c) Press the (+) PLUS or (-) MINUS keys to execute the factory reset procedure.

4-5

3.6. Manual adjustments

3.6.1. Input video signal

VG-819 setting values

MODE Signal 1

VESA 1024x768@75Hz

Signal 2

VGA 640x480

H DOT CLOCK

TOTAL DISP SYNC PULSE BACK HDstrat Hdwidth

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

78.75 1312 1024 96 176 0 0

25.18 800 640 96 48 0 0

V INTERLACE

TOTAL DISP SYNC PULSE BACK PORCH EQPfp EQPbp SERRATION EDP VDs VBf

[H] [H] [H] [H] [H] [H] [H] [H] [H] [H]

NON 800 768 3 28 0 0 OFF OFF 0 0

NON 525 480 2 33 0 0 OFF OFF 0 0

OUTPUT OUTPUT MODE

NRZ/RZ CV HS VS CS HD VD RGB HT C VIDEO Set-up Sync

ANALOG NRZ

POS POS NEG NEG NEG POS POS POS

0.70 OFF

0.3

ANALOG NRZ

NEG NEG NEG NEG NEG POS POS POS

0.70 OFF

0.3

Display setting Gray scale + External frame

(16 gradations) 0 ~ 100%

Solid all white

4-6

3.6.2. VIDEO gain adjustments

Use the signal source for which the analog output (R/G/B) has been adjusted to 0.7V.

1) Enter a signal 1 input of SXGA 1024x768(75Hz).

2) Turn off the display pattern completely and obtain an all black screen.

3) Assume the FACTORY mode in the procedures of Paragraph 2.2.3 and display the SERVICE menu.

4) Press the NEXT key once and advance to the tag [2].

5) Adjust the display pattern to Gray Scale (0 to 100%: in 16 gradations) + External Frame.

6) Use the (4) RIGHT or (3) LEFT keys and adjust the cursor to [AUTO OFFSET]. Make adjustments by

pressing the (+) PLUS or (-) MINUS keys.

7) When adjustments are over and the original screen has been recovered, confirm that all the 16 gradations of black to white are displayed.

8) Use the (4) RIGHT or (3) LEFT keys and adjust the cursor to [AUTO CONT MAX].

9) Press the EXIT key and withdraw from the SERVICE mode.

4-7

3.6.3. Factory setting

1) Enter a signal input. (no prescribe)

2) Assume the FACTORY mode in the procedures of Paragraph 2.2.3 and display the SERVICE menu.

3) Press the NEXT key three times and advance to the tag |4|.

4) Use the (4) RIGHT or (3) LEFT keys and adjust the cursor to [OSD DESIGN],[OSM SELECT] and [URL]. Set by pressing the (+) PLUS or (-) MINUS keys.

OSD DESIGN 0

OSM SELECT 0

URL 1

5) Press the EXIT key and withdraw from the SERVICE mode.

5-1

INSPECTION

TABLE OF CONTENS

Page

Set Inspection----------------------------------------------------------------------------------------------------- 5-2

1.1.1. Application ----------------------------------------------------------------------------------------------------------- 5-2

1.2. Inspection conditions --------------------------------------------------------------------------------------------- 5-2

1.2.1. Power source voltage --------------------------------------------------------------------------------------------- 5-2

1.2.2. Equipment to be used--------------------------------------------------------------------------------------------- 5-2

1.2.3. Inspection cables/connections---------------------------------------------------------------------------------- 5-2

1.2.4. Brightness setting -------------------------------------------------------------------------------------------------- 5-2

1.2.5. Inspection mode---------------------------------------------------------------------------------------------------- 5-2

1.2.6. OSM functions ------------------------------------------------------------------------------------------------------ 5-2

1.2.7. Configuration of inspection jigs --------------------------------------------------------------------------------- 5-2

1.2.8. Inspection mode setting ------------------------------------------------------------------------------------------ 5-3

1.3. OSM control operation ------------------------------------------------------------------------------------------5-12

1.3.1. Switch functions ---------------------------------------------------------------------------------------------------5-12

1.3.2. Basic operational procedures ----------------------------------------------------------------------------------5-12

1.4. Power ON ----------------------------------------------------------------------------------------------------------5-13

1.5. Inspection ----------------------------------------------------------------------------------------------------------5-13

1.5.1. Inspection on LCD brightness and contrast ----------------------------------------------------------------5-13

1.5.2. Inspection on automatic adjustment function---------------------------------------------------------------5-14

1.5.3. Inspection on input signal identification----------------------------------------------------------------------5-15

1.5.4. Inspection on Audio function -----------------------------------------------------------------------------------5-16

1.6.

Setting before shipment-----------------------------------------------------------------------------------------5-17

1.7. Safety test ----------------------------------------------------------------------------------------------------------5-17

1.7.1. Input current measurements -----------------------------------------------------------------------------------5-17

1.7.2. Power source/earth connections ------------------------------------------------------------------------------5-18

1.7.3. Dielectric strength test -------------------------------------------------------------------------------------------5-18

1.7.4. Leakage current test----------------------------------------------------------------------------------------------5-19

1.7.5. Insulation resistance test----------------------------------------------------------------------------------------5-19

External inspection on the LCD module --------------------------------------------------------------------5-20

2.1. External inspection of the display surface------------------------------------------------------------------5-20

2.1.1. Inspection items ---------------------------------------------------------------------------------------------------5-20

2.1.2. Inspection standards ---------------------------------------------------------------------------------------------5-20

Inspection of PLUG & PLAY communication and OSM "MONITOR INFORMATION" for model name/ serial number ------------------------------------------------------------------------------------5-22

3.1. A construction of System ---------------------------------------------------------------------------------------5-22

3.2. Input Signal --------------------------------------------------------------------------------------------------------5-22

3.3. Operational procedures-----------------------------------------------------------------------------------------5-23

3.4. EDID data file------------------------------------------------------------------------------------------------------5-24

5-2

1. Set Inspection

1.1.1. Application

The inspection procedures specified in this item shall be applied to the inspection of the LCD1550ME unit.

1.2. Inspection conditions

Unless otherwise specified, inspection shall be carried out under the following conditions.

1.2.1. Power source voltage

AC voltage: AC 100 - 120V/ 220 - 240V ± 5%, 50/60Hz

1.2.2. Equipment to be used

Equipment that can generate an output of the adjusted VG-819 unit or equivalent.

The signal timing for the inspection ROM shall conform to the table provided in Paragraph 1.2.8 herein.

1.2.3. Inspection cables/connections

1) Connections between the unit under inspection and the VG-819 shall be made through D-SUB connector of the unit under inspection and the cable that can carry each output of the VG-819, as specified below.

BNC-DSUB (female) connector

2) For connections to the power supply, an AC cable for LCD1550VM shall be used.

1.2.4. Brightness setting

Unless otherwise specified, inspection shall be carried out under the condition that the LCD brightness is set at the highest level.

1.2.5. Inspection mode

Each inspection shall be carried out in the inspection mode specified in each relevant inspection item.

The detailed setting for each mode shall be specified in Paragraph 1.2.8 herein.

1.2.6. OSM functions

If checking and operation by OSM are specified in each inspection item, display and operation of the OSM shall be carried out by operating the push switches of the unit under inspection, according to the instructions.

Outline operation is described in Item 1.3, “Operation of OSM control.”

1.2.7. Configuration of inspection jigs

Signal source

1) A video signal generator shall be used, which can generate an output of the VG-819 unit or equivalent.

5-3

1.2.8. Inspection mode setting

The respective setting data shall be the data for the VG-819.

Signal VG-819 setting values

Mode 01 02 03

Not used

04 05

H CLOCK

HPERIOD HDISP HSYNC HBACKP HDSTART HDWIDTH

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

28.322 900 720 108 54 0 0

35.500 936 720 72 108 0 0

21.053 848 640 64 84 0 0

28.322 900 720 108 54 0 0

35.500 936 720 72 108 0 0

V VTOTAL

VDISP VSYNC VBACKP EQP FP EQP BP SERRATION EQP VDSTART VDLINE SCAN

[H] [H] [H] [H] [H] [H]

[H] [H]

449 350 2 60 0 0 OFF OFF 0 0 Nonint

446 350 3 61 0 0 OFF OFF 0 0 Nonint

440 400 8 25 0 0 OFF OFF 0 0 Nonint

449 400 2 35 0 0 OFF OFF 0 0 Nonint

446 400 3 42 0 0 OFF OFF 0 0 Nonint

OUTPUT NRZ/RZ

HS VS CS HD VD CLOCK SYNC ON RGB VIDEO SETUP CLKMODE CLKOUT DISP,1CH,2CH SW0,SW1 RGB R(7-0),G(7-0),B(7-0) DELAY CLOCK DELAY

NRZ POSI NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON

4 nsec PAT SEL OPTION 2 OPTION 2 OPTION 2 OPTION 2 OPTION 2 CHRA PATTERN

Format Code Font Cell

1 82 16*16 16*16

16*16

16*16 GRAY Direction : 0 L0: 0

L7: 127 LE: 239

L1: 17 L8: 143 LF: 255

L2: 34 L9: 159

L3: 51 LA: 175

L4: 68 LB: 191

L5: 85 LC: 207

L6: 102 LD: 223

OPTION 2 (Note 2)

5-4

Signal VG-819 setting values Mode 06 07 08 09 10 H CLOCK

HPERIOD HDISP HSYNC HBACKP HDSTART HDWIDTH

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

25.18 800 640 96 48 0 0

30.24 864 640 64 96 0 0

31.5 832 640 40 128 0 0

31.5 840 640 64 120 0 0

36.0 832 640 56 80 0 0

V VTOTAL

VDISP VSYNC VBACKP EQP FP EQP BP SERRATION EQP VDSTART VDLINE SCAN

[H] [H] [H] [H] [H] [H]

[H] [H]

525 480 2 33 0 0 OFF OFF 0 0 Nonint

525 480 3 39 0 0 OFF OFF 0 0 Nonint

520 480 3 28 0 0 OFF OFF 0 0 Nonint

500 480 3 16 0 0 OFF OFF 0 0 Nonint

509 480 3 25 0 0 OFF OFF 0 0 Nonint

OUTPUT NRZ/RZ

HS VS CS HD VD CLOCK SYNC ON RGB VIDEO SETUP CLKMODE CLKOUT DISP,1CH,2CH SW0,SW1 RGB R(7-0),G(7-0),B(7-0) DELAY CLOCK DELAY

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA G POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON

4 nsec PAT SEL OPTION 2 OPTION 2 OPTION 2 OPTION 2 OPTION 2 CHRA PATTERN

Format Code Font Cell

1 82 16*16 16*16

16*16

16*16 GRAY Direction : 0 L0: 0

L7: 127 LE: 239

L1: 17 L8: 143 LF: 255

L2: 34 L9: 159

L3: 51 LA: 175

L4: 68 LB: 191

L5: 85 LC: 207

L6: 102 LD: 223

OPTION 2 (Note 2)

5-5

Signal VG-819 setting values Mode 11 12 13 14 15 H CLOCK

HPERIOD HDISP HSYNC HBACKP HDSTART HDWIDTH

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

36.0 1024 800 72 128 0 0

40.0 1056 800 128 88 0 0

49.5 1056 800 80 160 0 0

50.0 1040 800 120 64 0 0

56.25 1048 800 64 152 0 0

V VTOTAL

VDISP VSYNC VBACKP EQP FP EQP BP SERRATION EQP VDSTART VDLINE SCAN

[H] [H] [H] [H] [H] [H]

[H] [H]

625 600 2 22 0 0 OFF OFF 0 0 Nonint

628 600 4 23 0 0 OFF OFF 0 0 Nonint

625 600 3 21 0 0 OFF OFF 0 0 Nonint

666 600 6 23 0 0 OFF OFF 0 0 Nonint

631 600 3 27 0 0 OFF OFF 0 0 Nonint

OUTPUT NRZ/RZ

HS VS CS HD VD CLOCK SYNC ON RGB VIDEO SETUP CLKMODE CLKOUT DISP,1CH,2CH SW0,SW1 RGB R(7-0),G(7-0),B(7-0) DELAY CLOCK DELAY

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON

4 nsec PAT SEL OPTION 2 OPTION 2 OPTION 2 OPTION 2 OPTION 2 CHRA PATTERN

Format Code Font Cell

1 82 16*16 16*16

16*16

16*16 GRAY Direction : 0 L0:0

L7:127 LE:239

L1:17 L8:143 LF:255

L2:34 L9:159

L3:51 LA:175

L4:68 LB:191

L5:85 LC:207

L6:102 LD:223

OPTION 2 (Note 2)

5-6

Signal VG-819 setting values Mode 16 17 18 19 20 H CLOCK

HPERIOD HDISP HSYNC HBACKP HDSTART HDWIDTH

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

57.28 1152 832 64 224 0 0

65.0 1344 1024 136 160 0 0

70.49 1344 1024 136 160 0 0

75.0 1328 1024 136 144 0 0

78.75 1312 1024 96 176 0 0

V VTOTAL

VDISP VSYNC VBACKP EQP FP EQP BP SERRATION EQP VDSTART VDLINE SCAN

[H] [H] [H] [H] [H] [H]

[H] [H]

667 624 3 39 0 0 OFF OFF 0 0 Nonint

806 768 6 29 0 0 OFF OFF 0 0 Nonint

800 768 3 28 0 0 OFF OFF 0 0 Nonint

OUTPUT NRZ/RZ

HS VS CS HD VD CLOCK SYNC ON RGB VIDEO SETUP CLKMODE CLKOUT DISP,1CH,2CH SW0,SW1 RGB R(7-0),G(7-0),B(7-0) DELAY CLOCK DELAY

NRZ NEGA NEGA POSI POSI POSI POSI G POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA G POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON

4 nsec PAT SEL OPTION 2 OPTION 2 OPTION 2 OPTION 2 OPTION 2 CHRA PATTERN

Format Code Font Cell

1 82 16*16 16*16

16*16

16*16 GRAY Direction : 0 L0:0

L7:127 LE:239

L1:17 L8:143 LF:255

L2:34 L9:159

L3:51 LA:175

L4:68 LB:191

L5:85 LC:207

L6:102 LD:223

OPTION 2 (Note 2)

5-7

Signal VG-819 setting values

Mode 21 22 23 24 25

Not used

H CLOCK

HPERIOD HDISP HSYNC HBACKP HDSTART HDWIDTH

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

94.5 1376 1024 96 208 0 0

94.50 1528 1152 128 208 0 0

108.00 1800 1280 112 312 0 0

126.00 1680 1280 144 224 0 0

107.50

1664

1280

192

160

0 V VTOTAL

VDISP VSYNC VBACKP EQP FP EQP BP SERRATION EQP VDSTART VDLINE SCAN

[H] [H] [H] [H] [H] [H]

[H] [H]

808 768 3 36 0 0 OFF OFF 0 0 Nonint

937 900 4 31 0 0 OFF OFF 0 0 Nonint

1000 960 3 36 0 0 OFF OFF 0 0 Nonint

1078

1024

OFF

Nonint OUTPUT NRZ/RZ

HS VS CS HD VD CLOCK SYNC ON RGB VIDEO SETUP CLKMODE CLKOUT DISP,1CH,2CH SW0,SW1 RGB R(7-0),G(7-0),B(7-0) DELAY CLOCK DELAY

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ

POSI

NEGA

POSI

0.70V

OFF

1/2

ALL

POSI

OFF

8 bit

11111111

4 nsec PAT SEL OPTION 2 OPTION 2 OPTION 2 OPTION 2 OPTION 2 CHRA PATTERN

Format Code Font Cell

1 82 16*16 16*16

16*16

16*16 GRAY Direction : 0 L0:0

L7:127 LE:239

L1:17 L8:143 LF:255

L2:34 L9:159

L3:51 LA:175

L4:68 LB:191

L5:85 LC:207

L6:102 LD:223

OPTION 2 (Note 2)

5-8

Signal VG-819 setting values Mode 26 27 28 29 30 H CLOCK

HPERIOD HDISP HSYNC HBACKP HDSTART HDWIDTH

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

108.00 1688 1280 112 248 0 0

117.00 1632 1280 112 224 0 0

135.00 1688 1280 144 248 0 0

135.00 1664 1280 64 288 0 0

94.50 1480 1152 96 200 0 0

V VTOTAL

VDISP VSYNC VBACKP EQP FP EQP BP SERRATION EQP VDSTART VDLINE SCAN

[H] [H] [H] [H] [H] [H]

[H] [H]

1066 1024 3 38 0 0 OFF OFF 0 0 Nonint

1067 1024 8 33 0 0 OFF OFF 0 0 Nonint

1066 1024 3 38 0 0 OFF OFF 0 0 Nonint

1066 1024 8 32 0 0 OFF OFF 0 0 Nonint

912 864 3 44 0 0 OFF OFF 0 0 Nonint

OUTPUT NRZ/RZ

HS VS CS HD VD CLOCK SYNC ON RGB VIDEO SETUP CLKMODE CLKOUT DISP,1CH,2CH SW0,SW1 RGB R(7-0),G(7-0),B(7-0) DELAY CLOCK DELAY

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI POSI NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI POSI NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI POSI NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON

4 nsec PAT SEL OPTION 2 OPTION 2 OPTION 2 OPTION 2 OPTION 2 CHRA PATTERN

Format Code Font Cell

1 82 16*16 16*16

16*16

16*16 GRAY Direction : 0 L0:0

L7:127 LE:239

L1:17 L8:143 LF:255

L2:34 L9:159

L3:51 LA:175

L4:68 LB:191

L5:85 LC:207

L6:102 LD:223

OPTION 2 (Note 2)

5-9

Signal VG-819 setting values Mode 31 32 33 34 35 H CLOCK

HPERIOD HDISP HSYNC HBACKP HDSTART HDWIDTH

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

108.00 1600 1152 128 256 0 0

162.00 2160 1600 192 304 0 0

108.00 1688 1280 112 248 0 0

V VTOTAL

VDISP VSYNC VBACKP EQP FP EQP BP SERRATION EQP VDSTART VDLINE SCAN

[H] [H] [H] [H] [H] [H]

[H] [H]

900 864 3 32 0 0 OFF OFF 0 0 Nonint

1250 1200 3 46 0 0 OFF OFF 0 0 Nonint

1066 1024 3 6380 0 0 OFF OFF 0 0 Nonint

OUTPUT NRZ/RZ

HS VS CS HD VD CLOCK SYNC ON RGB VIDEO SETUP CLKMODE CLKOUT DISP,1CH,2CH SW0,SW1 RGB R(7-0),G(7-0),B(7-0) DELAY CLOCK DELAY

NRZ POSI POSI POSI NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI POSI NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ POSI POSI NEGA NEGA NEGA NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON

4 nsec PAT SEL OPTION 2 OPTION 2 OPTION 2 CHRA PATTERN

Format Code Font Cell

1 82 16*16 16*16

16*16

16*16 GRAY Direction : 0 L0:0

L7:127 LE:239

L1:17 L8:143 LF:255

L2:34 L9:159

L3:51 LA:175

L4:68 LB:191

L5:85 LC:207

L6:102 LD:223

OPTION 2 (Note 2)

5-10

Signal VG-819 setting values Mode 36 37 38 39 40 H CLOCK

HPERIOD HDISP HSYNC HBACKP HDSTART HDWIDTH

[MHz] [DOT] [DOT] [DOT] [DOT] [DOT] [DOT]

34.40 800 640 96 48 0 0

V VTOTAL

VDISP VSYNC VBACKP EQP FP EQP BP SERRATION EQP VDSTART VDLINE SCAN

[H] [H] [H] [H] [H] [H]

[H] [H]

1024

480 2 33 0 0 OFF OFF 0 0 Nonint

1024 480 2 33 0 0 OFF OFF 0 0 Nonint

OUTPUT NRZ/RZ

HS VS CS HD VD CLOCK SYNC ON RGB VIDEO SETUP CLKMODE CLKOUT DISP,1CH,2CH SW0,SW1 RGB R(7-0),G(7-0),B(7-0) DELAY CLOCK DELAY

NRZ

NEGA POSI NEGA NEGA POSI NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

NRZ NEGA NEGA NEGA NEGA POSI NEGA

POSI

0.70V OFF 1/2 ALL POSI OFF 8 bit 11111111 ON 4 nsec

PAT SEL CHARA

CHARA

CHRA PATTERN

Format Code Font Cell

82 16*16 16*16

1 82 16*16 16*16

GRAY Direction : 0 L0:0

L7:127 LE:239

L1:17 L8:143 LF:255

L2:34 L9:159

L3:51 LA:175

L4:68 LB:191

L5:85 LC:207

L6:102 LD:223

5-11

Note 1:

According to the designation of sync signals and the setting of each inspection mode, the analog outputs (BNC) of the signal generator shall be connected as specified below. (Except the cases when otherwise specified)

1) SEPARATE: R/G/B CONNECTION, HS ←→ H, VS ←→ V, CS not connected

Note 2:

Screen of Option 2

5-12

1.3. OSM control operation

Each OSM function is available by pressing the push-button switches (EXIT,3,4, -, +, NEXT, RESET) allocated in the lower section of the front bezel (or the control PWB when a PWB unit only is furnished).

1.3.1. Switch functions

The basic functions of the respective push-button switches (or called the keys, but in the same meaning) are described below.

In a mode where no OSM display is presented, the main menu of the OSM menu can be displayed when any key out of UP, DOWN, -, and + is pressed.

Exit: Menu Close, Sub menu exit

Control (3,4): Menu Open, Cursor Move, Item Select

Adjust (+, -): Menu Open, Adjust select item, Enter Sub menu

Next Menu Open, Tag Select, Function execute

Reset: Open reset menu, Sound Mute

1.3.2. Basic operational procedures

1) Press any key out of 3or4or + or -, and confirm that a menu as shown below is displayed.

2) When the NEXT key is used, the selective tag moves to the right and the adjusting screen changes.

With the adjusting screen selected, use the keys3and4to select the adjusting item (simply “item” hereafter) and set the adjusting value by the use of the keys - and +. To execute an automatic adjustment function (CONTRAST AUTO ADJUST, AUTO ADJUST), press the key + or - in the state of item highlight. Then, auto adjust are carried out.

When the adjusting item is present in TOOL or INFO., move to the selecting item with the NEXT key and select the wanted item with the keys3and4. In the state that the wanted item is highlighted in green, press the key + or - in order to get the adjusting screen displayed for each item.

3) When inspection is finished, press the EXIT key to withdraw from the OSM menu.

5-13

1.4. Power ON

1) Connect an AC power cable to the unit being inspected.

2) Connect the VG-819 cable to the unit being inspected. Any input connector is acceptable.

3) Turn on the POWER switch of the VG-819 to generate an output of Signal 17.

4) There is a vacation switch (a seesaw switch) at the left side of the unit being inspected. Confirm that this switch is set at the “



” side. Press the POWER key at the right end of the front to turn on the unit being

inspected.

5) The LED is then lit in green and a screen is displayed.

1.5. Inspection

1.5.1. Inspection on LCD brightness and contrast

1) Enter Signal 17 through INPUT. The screen display is made in all white.

2) Display the BRIGHTNESS/CONTRAST tag of the OSM menu.

3) Get BRIGHTNESS highlighted with the3and4keys.

Brightness adjust menu

4) Confirm that the green bar is changed by the operation of the (-) and (+) keys, and that the screen brightness is changed.

5) Confirm that the highlight display is for BRIGHTNESS. Press the RESET key. Then, the confirmation screen is displayed. Press the NEXT key to make resetting. (The BRIGHTNESS bar is returned fully to the right.)

6) Use the3and4keys to obtain CONTRAST displayed in the highlight mode.

Contrast adjust menu

7) Confirm that the green bar is changed and the screen contrast is also changed when the (-) and (+) keys are operated.

5-14

8) Get AUTO ADJUST highlighted with the (-) and (+) keys.

Contrast Auto Adjust menu

9) Press the (-) and (+) keys and wait until the OSM display is restored to the former display. At that time,

confirm that the screen is normally displayed.

1.5.2. Inspection on automatic adjustment function

1) Enter Signal 17 through INPUT. (1-dot loss + External frame screen)

2) Display the OSM menu. Use the NEXT key to move as far as to the POSITION tag.

Horizontal Position adjust menu Vertical Position adjust menu

H.SIZE adjust menu FINE adjust menu

3) Move the cursor to the HORIZONTAL POSITION, using the3and4keys. Operate the (-) and (+) keys to shift the POSITION to an extent so that the caused difference can be visually perceived.

4) In the same manner, shift the VERTICAL POSITION, H. SIZE, and FINE from their initial levels.

5) Use the NEXT key to move as far as to the AUTO ADJUST adjusting tag.

Auto Adjust menu

6) Execute automatic adjustments by the use of the (+) or (-) key.

Confirm that the screen (POSITION/SIZE/PHASE) is normally adjusted.

5-15

1.5.3. Inspection on input signal identification

Purpose of inspection: Confirming that a normal display is obtainable for each signal input.

Unless otherwise specified, the display pattern is as shown in the initial screen, conforming to 1.2.8 [Inspection mode setting].

--- Inspection of signal input ---

1) According to the table below, make setting of the input connector and the signal, and enter a signal

input.

Item No. Ins

ection signal No. SYNC 1 1 SEPARATE 2 4 SEPARATE 3 6 SEPARATE 4 8 SEPARATE 5 9 SEPARATE 6 11 SEPARATE 7 12 SEPARATE 8 13 SEPARATE 9 14 SEPARATE

10 17 SEPARATE 11 19 SEPARATE 12 20 SEPARATE

2) When a screen is displayed, visually check whether the display is free from abnormality. (Freedom from any extreme displacement in position, size, and phase, flickering in the screen, and extreme color deterioration)

3) Check the OSM menu for the signals that have signal numbers underlined. Display the OSM information screen (the rightmost tag). Get the [DISPLAY MODE] highlighted with the (3) LEFT or (4) RIGHT keys. Then, display the [DISPLAY MODE] screen with the (+) PLUS or (-) MINUS key. Confirm that the displayed definition coincides with the definition of the input signal.

--- Inspection of POWER SAVE ---

4) Remove the output signal of the VG-819 from H.sync and V.sync connector. Confirm that the screen disappears and the OSM menu of the [NO SIGNAL] is displayed. Wait in this state for about 5 seconds, and confirm that the LED display is turned into amber and the POWER SAVE mode is assumed.

5-16

AUDIO INPUT

PC or Audio Player

1.5.4. Inspection on Audio function

Purpose of inspection: Confirming that the audio function works normally.

1) It connects audio-in with the PC or the audio player and it enters a sound.

2) Enter Signal 17 through INPUT.

3) Display the OSM menu. Use the NEXT key to move as far as to the Volume tag.

Sound Volume menu

4) Confirm that the green bar is changed and the audio volume is also changed when the (-) and (+) keys are operated.

5) It confirms that sound is outputted from the left-right speakers and headphones.

5-17

1.6. Setting before shipment

In order to recover the initial conditions of all settings, the contents of the memory are reset before shipment. This reset process involves actions in regard to the memory of signal modes. Therefore, these actions should be taken after the completion of all electrical inspection and display inspection.

1) Enter an input of Signal 4 through INPUT. Operate the OSM to enter the service mode, and display a service menu.

2) Adjust the cursor to [FACTORY PRESET] by the use of the(3) LEFT or (4) RIGHT keys, and press the (+) PLUS, (-) MINUS keys.

Service menu

3) When the OSM is displayed again, the resetting process has been finished. Press the EXIT key to withdraw from the service mode.

Note 1: After the completion of this process, confirm, without fail, that the present condition is surely after

the withdrawal from the service mode.

1.7. Safety test

• Destination : All over the world

• Applicable standards : UL1950/C-UL/EN60950

• Unit class : Class I units (the units protected against electric shocks by protective

earthing, or those equipped with 3-core power cords)

• Ratings : AC100-120/220-240V 50/60Hz 0.7 / 0.35A

1.7.1. Input current measurements

Under the measuring conditions specified below, an input current shall be measured while the 50Hz input voltage is maintained at 220V AC (+0 to -5V). The input currents measured shall be confirm so they satisfy the judgment standard. (The rear rating plates are the same as those for North America and Europe. Therefore, measurements should also be based on this setting.)

(1) Measuring conditions

• Condition of the set : ON mode

• Measuring conditions : The inspection signal is set at “17” and “white” is displayed throughout

the screen. At that time, the brightness and contrast shall be kept under the brightest condition.

(2) Judgment standard

• The input current shall be kept below 0.7A +10%.

5-18

1.7.2. Power source/earth connections

a. Checks on the power source/earth connections

The earth side of the cord or the earth wire of the inlet filter for the cord set shall be visually checked to see that it is connected to the chassis block of the unit as specified below.

1) The earth wire color shall be spiral of green and yellow.

[Units applicable to UL1950 or IEC60950 (EN60950)]

2) The earth wire shall be firmly connected to the chassis block by the use of a screw (See Note) of

3.5mm∅ in diameter.

Note: Spring washers or star washers shall be used, without fail.

b. Earth resistance testing

This testing shall be carried out prior to the dielectric strength test. The earth resistance shall be 0.1Ω or less when a current of 25A AC is carried between the earth side of

the cord (the plug block or the section closest to the plug where no plug is provided) and the metallic block (the DVI connector) that is used as a safety earth for the unit.

Where the earth resistance exceeds 0.1Ω, the condition shall be still acceptable if the earth resistance is

0.1Ω or less when the resistance of the power cord is excepted.

1.7.3. Dielectric strength test

To confirm the freedom from insulation breakdown, testing shall be carried out under the conditions specified below.

1) Measuring conditions

• Measuring instrument : Dielectric strength tester (The specified voltage shall be maintained in the

state that a current of 10mA is carried.)

• Testing point : Between the electrical circuit block and the exposed metallic block (D-SUB

connector)

Note: The electrical circuit block shall mean the power input block (primary side). Testing shall be carried

out under the condition that both poles of the power plug are short-circuited. (Where a 3-core cord is used, the two poles other than the earth terminal shall be short-circuited.)

2) Judgment standard

The freedom from insulation breakdown shall be confirmed under the condition that the applied voltage is maintained at 1500V AC (+0 to 50V) for one minute.

Even though the result of this testing is OK, such a condition shall be regarded as unacceptable if there is a leakage (flashing) around the section where the test voltage has been applied.

If the result of insulation resistance test is found unacceptable, to be carried out after this testing, such a condition shall be regarded as that an insulation breakdown has occurred.

5-19

1.7.4. Leakage current test

A leakage current shall be measured under the conditions specified below, in order to confirm that the requirements of the judgment standard are met.

1) Measuring conditions

• Measuring instrument : Leakage current meter (A 1500Ω resistor shall be incorporated, together

with a bypass capacitor of 0.15µF. )

• Testing point : Between the exposed metallic block (D-SUB connector) and Phases A and

B of the power source.

• Condition of the set : A power cable shall be connected without connecting a signal generator. The

see-saw switch on the set side shall be turned ON and OFF.

2) Judgment standard

The leakage current measured shall be 1.5mA or less with an input of 240V AC × 1.06 +5/-0V (60Hz).

1.7.5. Insulation resistance test

An insulation resistance shall be measured under the conditions specified below, in order to confirm that the requirements of the judgment standard are met.

(1) Measuring conditions

• Measuring instrument : 500V DC megger

• Testing point : Between the power circuit block and the exposed metallic block

(D-SUBI connector)

• Measured value readout : A test voltage shall be applied for one minute and the resistance value

shall be read out thereafter.

(2) Judgment standard : 10MΩ or more

5-20

2. External inspection on the LCD module

2.1. External inspection of the display surface

The display surface shall be visually inspected according to the inspection items specified below. In cases of the discovery of extreme defects or doubtful judgment, final judgment should be made on the basis of relevant detailed standards for inspection.

Unless otherwise specified, the inspection signals shall be used at the timing of Signal 17 specified in Paragraph 1.2.8 herein.

2.1.1. Inspection items

1) Examination of the missing of lines (horizontal or vertical lines failing to be displayed).

2) Presence of extreme missing of dots (bright dots and black dots), or conspicuous ones.

3) Presence of extreme flaws, wrinkles, air bubble, dents, lint, foreign matter, and conspicuous

abnormality on the display surface.

2.1.2. Inspection standards

Inspection standards for external appearance and display conditions

(1) Inspection condition

a) Viewing distance is approximately 385cm.

b) Ambient illuminant is from 300 to 500lux.

c) Viewing angle is +/- 10 deg.

d) Ambient temperature is approximately 25deg C.

e) Input signal clock frequency: 40MHz.

5-21

Defect type Limit

0.01mm ≤ W ≤ 0.05mm L ≤ 10mm

N ≤ 4

0.01mm ≤ W

10mm < L

N = 0

Scratch

0.05mm < W N = 0

0.15mm ≤ Φ ≤ 0.4mm N ≤ 4

Dent

0.4mm < Φ

N = 0

0.15mm ≤ Φ ≤ 0.5mm N ≤ 4

Block spot

0.5mm < Φ

N = 0

L ≤ 3mm N ≤ 4

Lint

3mm < L N = 0

Visual Defect

Newton rings Not allowed

Bright dot

N ≤ 4 (Green:4)

Dark dot

N ≤ 4

Total dot

N ≤ 4

Two adjacent dot

Bright dot Dark dot

≤ 2 pairs ≤ 2 pairs

Three or more adjacent dot No allowed Distance between defects

Bright dot Dark dot

≥ 15mm ≥ 15mm

Electrical defect

Line defect No allowed

*1) W: Width, L: Length, N: Number

*2) Definition of Adjacent

R G B R G B R G B

*3) Bright dot is defined as follows: ≥ 1/3 area of sub-pixel Dark dot is defined as follows: ≥ 1/3 area of sub-pixel

Defective pixel

Adjacent pixel

5-22

3. Inspection of PLUG & PLAY communication and OSM "MONITOR INFORMATION" for model name/ serial number

3.1. A construction of System

This system should be connected as shown below.

R G B H V

Printer Cable

Signal Generator

AUTO ADJ I/F JIG

Part No. 599910401 (120V) (For A ver.)

Part No. 599910402 (220V) (For B ver.)

PROGRAM

PART No. 599910578

Program Disk

D-Sub 15pin Signal Cable

3.2. Input Signal

Horizontal synchronization frequency : 43kHz(Negative)

Vertical synchronization frequency : 42Hz(Negative)

5-23

3.3. Operational procedures

1. Start PNP.EXE from DOS mode or DOS pronto of Windows.

2. Operation key assignment

• Determine the operation mode with the F1 ~ F9 and ESC keys.

F1 (Select Model) : Setting file changeover for respective models

F4 (Read) : EDID data for reading

F5 (Write Input 1) : It is not used in this model.

F8 (Write Input 2) : It is not used in this model.

F9 (Write ALL) : EDID data and OSM data of the writing and inspection.

ESC (EXIT) : End of program

3. Press the F1 key and enter an input of setting file for the related model. Press the Enter key.

File name Model

08EK1ABD LCD1550ME

4. Writing and inspection procedures

a. Press the F9 key (Write ALL).

b. Since the screen is changed over to the one that waits for an input of serial number, examine the

serial number of the set, enter it from the keyboard, and press the Enter key.

The message of the screen:

Model Name "LCD1550ME " Input serial number (Enter only: Use previous number)

c. Model name and serial number writing for the OSM “MONITOR INFO.”

According to the screen commands, change over the signals, and make OSM menu setting for the writing set.

Signal: fH 43kHz (Negative)

fV 42Hz (Negative)

When the Enter key is pressed, the model name and serial number of the OSM “MONITOR INFORMATION” are written.

d. EDID data writing

When the Enter key is pressed, the EDID data of the D-SUB INPUT are written.

The message of the screen:

Input 1 File 1 set V 42Hz N (Hit any key)

e. Upon normal completion, a screen display is presented "OK".

f. A power-supply switch is switched off -> turned on, Display “MONITOR INFORMATION” of the OSM,

and confirm that the model name (LCD1550ME) and serial number have been correctly written.

5-24

3.4. EDID data file

The EDID data file text is shown below. When you write or inspect EDID for this monitor, the following table can be used.

file name : L1550ME.TXT

0 1 2 3 4 5 6 7 8 9 A B C D E F

00 FF FF FF FF FF FF 00 38 A3 E3 65 01 01 01 01

*1) *2) 01 03 08 1E 17 78 EA 9D 9E 99 58 4C 93 26

21 4C 54 BF EE 00 01 01 01 01 01 01 01 01 01 01

01 01 01 01 01 01 C3 1E 00 20 41 00 20 30 10 60

13 00 30 E4 10 00 00 1E 00 00 00 FD 00 37 4B 1F

3C 08 00 0A 20 20 20 20 20 20 00 00 00 FC 00 4E

45 43 20 4C 43 44 31 35 35 30 4D 45 00 00 00 FF

00 *3) *3) *3) *3) *3) *3) *3) *3) *3) *3) *3) *3) *3) 00 *4)

Table 1 Data list (Management number : L1550ME)

Note 1: address 10h Week of manufacture = Month of manufacture × 4

Note 2: address 11h Year of manufacture - 1990

Notes 3: address 71h ~ 7Dh Serial Number (ASCII coded) If less than 13 char, terminate with 0Ah and fill the rests with 20h.

Note 4: address 7Fh Checksum The sum of entire 128 byte shall be equal to 00h.

6-1

TROUBLE SHOOTING

TABLE OF CONTENTS

page

1. No display of screen(Screen is black ,color of LED is amber) --------------------------------6-2

2. Nothing displays on screen(Screen is black ,color of LED is green) ------------------------6-3

3. Checking the back light unit ---------------------------------------------------------------------------6-6

4. Abnormal screen -----------------------------------------------------------------------------------------6-7

5. No OSM display ------------------------------------------------------------------------------------------6-9

6. Abnormal plug and play operation -----------------------------------------------------------------6-10

7. Checking the interface circuit of sync signal ----------------------------------------------------- 6-11

7.1 Checking the control circuit of horizontal sync pulse ---------------------------------------- 6-11

7.2 Checking the control circuit of vertical sync pulse -------------------------------------------- 6-11

8. Checking the resolution change IC movement -------------------------------------------------6-12

9. No power on ---------------------------------------------------------------------------------------------- 6-13

9.1 No power on (1) ----------------------------------------------------------------------------------------6-13

9.2 No power on (2) ----------------------------------------------------------------------------------------6-14

10. Checking the DC/DC converter circuit -----------------------------------------------------------6-15 1 1. Checking the operation of CPU ------------------------------------------------------------------- 6-16

12. Checking the audio circuit -------------------------------------------------------------------------- 6-17

13. Check the inverter board circuit -------------------------------------------------------------------6-18

6-2

1. No display of screen (Screen is black, color of LED is amber)

Does OSM display when you push key button.

When a signal isn't being inputted, it is indicated with "NO VIDEOINPUT". It is indicated with "OUT OF RANGE" at the time of the frequency that it can't be distinguished.

YES

Pressed "No OSM display" section.

Check if the sync signal from Computer is output and if the video cable is connected normally.

Input the sync signal of computer, or change the cable.

Proceed "Checking the resolution change IC movement" section.

6-3

2. Nothing displays on screen (Screen is black, color of LED is green)

Is backlight lit?

Does computer output RGB video signals?

Check OSM menu is displayed on screen when you push the "NEXT" ke

Proceed "Abnormal screen" section.

Refer "Checking the backlight unit" section

Check the video cable for failure. Check the host for output signal with all black only.

1) Change pattern of video signal output on the host.

2) Reconnect the video cable.

3) Change the video cable.

6-4

Continue

Check the 3.3 V power are supplied on I310 pin 2.

Check if the voltage on I310 pin3 that is high level DC at 5V.

Failure point

Printed wire broke between P301 and I310

Failure point

I310 Failure

Is a dot clock being outputted under the condition that a LCD module is connected to P307

in 44?

Failure point

1) I306 failure

2) Printed wire broke between I306 and P307 pin 44.

Check the H-sync pulse of negative polarity is output on P307 pin 38 at TTL level.

Failure point

1) I306 failure

2) Printed wire broke between I306 and P307 pin 38.

Check the V-sync of negative polarity are output on P307 pin 40.

Failure point

1) I306 failure

2) Printed wire broke between I306 and P307 pin 40.

6-5

Continue

Check the data enable of positive polarity are output on P307 pin 42.

Failure point

1) I306 failure

2) Printed wire broke between I306 and P307 pin 37.

Check the data signal output on P306 and P307 R, G, B data pin.

Failure point

1) I306 failure

2) Printed wire broke between I306 and P306 data line

Failure point

1) The cable broke between P306, P307 and LCD module.

2) LCD module failure.

6-6

3. Checking the back light unit

Is +15V supplied to P803 pin 3, 4 to inverter PWB?

Failure point

Inverter cable disconnection.

Check the INV_EN signal of the rectangle input I309 pin 5 at TTL high level

Is a "H" level being output in the TTL level from I302 pin 2 Or, is INV_EN signal of the rectangle being output?

Failure point

Printed wire broke between I302 pin 2 and I309 pin 5

Check the PWM signal of the input from I302 pin 1 is a BRI signal.

Failure point

1) Printed wire broke between I302 pin 1 and I309 pin 3.

)

I309 failure.

Failure point

1) Inverter cable disconnection.

2) Inverter of LCD module failure.

6-7

4. Abnormal screen

Check the R, G, B video signal from computer input on D-Sub R, G, B connector.

Failure point

1) No R, G and B video signal output from host computer. Check computer

2) Video signal cable disconnection.

Check the R, G, B input signals on I306 pin 95, 91, 87 respectively that their level is 0.7V

p-p

maximum.

Failure point

In the case of the Red signal. (A Green and Blue signal is the same path, too.)

1) Printed wire broke between D-Sub(R) and I306 pin 95.

2) R346 short.

3) C348 open.

4) R345 open.

Is the pulse of the TTL level being output to P306, P307 from the data line of I306?

Failure point

1) Printed wire broke between I306 data line and P306, P307.

2) I317 failure.

Check the negative horizontal sync pulse output to P307 pin 38 from I306

in 74 at TTL level.

Failure point

1) Printed wire broke between I306 pin 74 and P307 pin 35.

2) R350 open

3) C383 short

6-8

Continue

Check the negative vertical sync pulse output to P307 pin 40 from I306

in 73 at TTL level.

Failure point

1) Printed wire broke between I306 pin 73 and P307 pin 40.

2) R351 open

3) C384 short

Check the positive DE pulse output to P307 pin 42 from I306

in 43 at TTL level.

Failure point

1) Printed wire broke between I306 pin 42 and P307 pin 42.

2) R352 open

3) C385 short

Check the SHFCLK OUTPUT to P307 pin 44 from I306 pin 44 at TTL level.

Failure point

1) Printed wire broke between I306 pin 44 and P307 pin 39.

2) FB312 open

3) FB311 open

4) C354 short

5) C355 short

Process "Checking the resolution change IC movement" section.

6-9

5. No OSM display

Check the input of pulse from I306 pin 98, 103, 99, 102, 104, 105.

Failure point

1) Printed wire broke between I306 pin 99 and I302 pin 17.

2) Printed wire broke between I306 pin 102 and I302 pin 21.

3) Printed wire broke between I306 pin 104 and I302 pin 20.

4) Printed wire broke between I306 pin 105 and I302 pin 18.

5) Printed wire broke between I306 pin 103 and I302 pin 22.

6) Printed wire broke between I306 pin 98 and I302 pin 23.

Process "Checking the resolution change IC movement" section.

6-10

6. Abnormal plug and play operation

Failure point

I308 failure

Confirm the input of serial clock on I308 pin 6 SCL at TTL level.

Failure point

1) The video cable may have failed or may not have connections for DDC.

2) Between I308 pin 6 and P302 pin 14 may have failed.

3) R337 open.

4) Cable failure.

Confirm the input of serial data on I308 pin 5 SDA at TTL level.

Failure point

1) The host machine isn't communicating in DDC2 mode.

2) The video cable may have failed or may not to have connections for DDC.

3) Between I308 pin 6 and P302 pin 13 may have failed.

4) R338 open.

5) Cable failure.

Failure point

I308 failure

6-11

7. Checking the interface circuit of sync signal

7.1 Checking the control circuit of horizontal sync pulse

7.2 Checking the control circuit of vertical sync pulse

Check the horizontal sync signal on I306 pin 150 TTL level.

Process "Checking the resolution change IC movement" section.

Failure point

1) Video cable may have failed.

2) Printed wire broke between P302 pin 13 and I306 pin 150.

3) FB302, R332 open.

Check the vertical sync signal on I306 pin 148 TTL level.

Process "Checking the resolution change IC movement" section.

Failure point

1) Video cable may have failed.

2) Printed wire broke between P302 pin 14 and I306 pin 148.

3) FB301, R328 open.

6-12

8. Checking the resolution change IC movement

Is there +3.3V supply on I306 pin 77, 79, 84, 96, 92, 88, 8, 129, 136, 139, 137, 143, 11, 21, 58, 108, 149, 12, 33, 40 and 65.

Proceed "Checking the DC/DC converter circuit" section.

Is 20MHz clock input to I306 pin 141 at TTL level?

Is 20MHz clock output from X301 at TTL level?

Failure point

Print wire broke between X301 and I306 pin 141.

Failure point X301 failure.

Is +5.0V supplied to I306 pin 100 at High level?

Check the output of 5.0V "H" pulse from I301 pin 6.

Is 5.0V supplied to I301 pin 7?

Failure point

Print wire broke between I301 pin 6 and I306 pin 100.

Failure point

1) FB318 failure

2) Power source

Failure point

I301 failure.

Failure point

I306 failure.

6-13

9. No power on

9.1 No power on (1)

Check output voltage +5V, +15V is right or not.

It is not power board problem.

Check power switch is turn on or not.

Turn switch on.

Check power cord(P801), Signal cable(P302), P802, P803 is conn ected right or not.

Connect it right.

Check C805 is about DC 140V-330V or not.

Check F801, D801, P801 and repair them.

Check C807 is over 10V or not.

Check R805, R803, ZD802, Q801, I801 and repair them.

Check pin 6 of I801 have same pulse or not.

Check peripheral components of I801 and repair them. (e.g. Q805, Q806)

Check pin 3 of T802 have same pulse or not.

Check Q803, R813, R814, D806, R812 and repair them.

Check peck voltage of R811 triangle pulse is up to 1 volt or not.

Check D804, R807 and repair them.

Check D809, D810, C816, C821, T802 have same short circuit, or the output +5V, +15V is over load.

Repair them.

Check feedback circuit around I802, I803 and the other components and repair them.

6-14

9.2 No power on (2)

Check +5V power is supplied from power source.

Failure point

Power source failure.

Is LED turned on in amber momentarily when a power button is pushed ?

Failure point

Power source failure.

Process "Checking the operation of CPU" section.

6-15

10. Checking the DC/DC converter circuit

Check the output of 3.3V line voltage from I310 pin 2.

Is the output FB320 being inputted to I315 pin 3?

Failure point

Printed wire broke between I310 pin 3 and output of FB321.

Failure point

I310 failure

Failure point

Printed wire broke between I310 pin 2 and I306 power supply pin.

6-16

11. Checking the operation of CPU

Is there +5.0V supply on I302 pin 8.

Failure point

Printed wire broke between output of FB319 and I302 power supply pin.

Is 20MHz clock input to I302 pin 11 and 12 at TTL level?

Failure point

X301 failure.

Check the input of 5V "H" pulse from I303 pin 4 are same as I302 pin 7.

(14 msec Typ)

Failure point

Printed wire broke between I303 pin 4 and I302 pin 7.

I302 failure.

6-17

12. Checking the audio circuit

Is a cable with the host PC connected?

Aren't the setups of the host PC a minimum and off?

Failure point

Audio cable disconnection.

Failure point

The setup of the host PC is changed.

Is correct output waveform being inputted from JK011 pin 2, 3 of the host PC?

Failure point

Audio cable disconnection.

Is the waveform which is the same as JK011 being inputted to I001 pin 4, 9?

Failure point

1) Printed wire broke between JK011 pin 2, 3 and I001 pin 4, 9.

2) R040, R041 open.

3) R042, R043 short. 4

)

C040, C041 open.

Is output waveform being outputted in I001 pin 14, 17?

Is 15V supplied to I001 pin 15, 16?

Proceed section 9.1 "No power on (1)".

Failure point

1) Speaker cable disconnection.

2) Speaker failure.

Is mute/STD-BY low level at pin 11, pin 12.

Proceed section 11. "Checking the operation of CPU".

Is Variable DC volume control at pin 6.

Proceed section 11. "Checking the operation of CPU".

Failure point

I001 failure

6-18

13. Check the inverter board circuit

Check Vin pin is around 15.5V. On/Off pin is over 2V. Bri

htness pin is between 0.3V and 3.0V.

It is not inverter problem.

Check IC pin 3 around 5V.

Check Q1, Q2, Q8, D1, F1 and repair them. Check one of these components was short to GND.

Check CN2 and CN3 is connected right.

Check CCFL and repair them.

Check the IC pin 3 is PWM.

Check the IC pin 11 is triangle.

Check the Q4, Q10, R5, D5, L1 and repair them.

Check D2, C14, R11and repair them.

Check the IC pin 9 is 2.5V.

Check R20 and R28 and repair them.

Check the IC pin 8 feedback waveform.

Check CR1, CR2 and repair them.

Repair the LM339.

Check the buck circuit.

6-19

Check the Royer circuit.

Check the Q17, Q20, Q5, Q6, C13 and repair them. Check the transformer and repair them. Check the one of these components was short to

GND.

Check the H.V. and balance circuit.

Check the C3, C7, C12, C20, L3 and repair them.

Check the Feedback and protection circuit.

Check the Q19, Q7, Q11, D3, Q14 and repair them.

Check one of these components was short to GND.

Continue

7-1

CIRCUIT DESCRIPTION

TABLE OF CONTENTS

Page

1. Audio circuit ----------------------------------------------------------------------------------------- 7-2

1.1 Audio input ------------------------------------------------------------------------------------ 7-2

1.2 Audio output ----------------------------------------------------------------------------------- 7-2

2. Power supply ------------------------------------------------------------------------------------- 7-2

3. On-screen circuit --------------------------------------------------------------------------------- 7-3

4. Video input circuit -------------------------------------------------------------------------------- 7-3

5. Definition converter LSI peripheral circuit ------------------------------------------------- 7-3

6. System reset, LED control circuit ------------------------------------------------------------ 7-4

6.1 System reset ------------------------------------------------------------------------------------ 7-4

6.2 LED control circuit ----------------------------------------------------------------------------- 7-4

7. E

PROM for PnP -------------------------------------------------------------------------------- 7-4

8. E

PROM ----------------------------------------------------------------------------------------- 7-4

9. CPU circuit ---------------------------------------------------------------------------------------- 7-4

9.1 Detection of POWER switch status -------------------------------------------------------- 7-4

9.2 Display mode identification ------------------------------------------------------------------ 7-4

9.3 User Control ------------------------------------------------------------------------------------- 7-6

9.4 Control of definition converter MCU I306 ------------------------------------------------ 7-6

9.5 I

C bus control ---------------------------------------------------------------------------------- 7-7

9.6 Power ON sequence -------------------------------------------------------------------------- 7-7

9.7 Power OFF sequence ------------------------------------------------------------------------ 7-8

10. Inverter ------------------------------------------------------------------------------------------- 7-9

10.1 Circuit Diagram ------------------------------------------------------------------------------- 7-9

10.2 Inverter basic function ----------------------------------------------------------------------- 7-9

7-2

1. Audio circuit (Circuit diagrams Main PWB)

1.1 Audio input

The audio signal input received from the audio input terminal (JK011) is applied to the amplifier I001 of 4 (L-CH) and 9 (R-CH) through the low-pass filter consisting of R040, R041, R042, R043, C040 and C041. In this amplifier, controls of Volume, and mute are conducted. The audio signal controlled at the pin 6 determines the attenuation of output of the amplifiers. Since then, the signal is output to the jack P003.

1.2 Audio output

The audio signal is output from the Audio output terminal (P003) of the jack board to the internal speaker system.

2. Power supply (Circuit diagrams MAIN PWB)

1. Line filter consists of C801, T801, C803, C804. It eliminates high frequency interference to meet EMI’s requirement.

2. Rec & Filter

Bridge diode D801 converts AC source into pulsed DC. This pulsed DC is smoothed and filtered by C805. R802 is an NTC ( negative thermal coefficient ) resistor, used to reduce inrush current to be within safe range.

3. Power transformer :

T802 converts energy for square wave from power source C805 to secondary side to generate +12V and +5V.

4. Output :

The square wave from T802 is rectified by D809, D810, then filtered by C817, C822 to generate +12V and +5V respectively.

4.1 A 5V power supply for LCD module, CPU and logic is generated from the power source.

4.2 I310 : 3-terminal regulator

A 3.3V power supply for I306 analog is generated from the 5V source.

4.3 I310 : 3-terminal regulator

A 3.3V power supply for I306 digital is generated from the 5V source. Q303, Q304 ON/OFF control for LCD Module ON/OFF control is performed for power ON/OFF and also for the power saving sequence.

5. Driver : Q803

If the electrical potential of gate is larger than source by about 10 volts, Q803 turns on.

6. FB :

Negative feedback CKT consists of photo coupler I802 and adjustable regulator I803. It can maintain output voltages +5V and +12V at a stable level.

7. PWM :

7.1 Start : When power is turned on, R805, R803 conducts due to bias from C805. C807 is charged a 16 volt

and a starting current to pin 7 of I801. I801 starts to oscillate and outputs a pulse train through pin 6 to drive Q803.

7.2 OPP : When Q803 turns on, C805 supplies a linearly increasing triangle current through the primary

inductance of T802 to the driver Q803, once the peak value of this current multiplied by R811 exceeds1 volt, pulse train will be shut down immediately to protect Q803, T802 from being burned out.

7-3

7.3 Regulation : If output voltage +5V goes up, the R terminal of I803 gets more bias, accordingly photo

transistor and photo diode flows more current. The voltage of pin 2 goes up too, making the pulse width of pin 6 to become narrower. So the output voltage +5V will be pulled down to a stable value.

7.4 OVP : If +5V goes up too much, the induced voltage on pin 4 of T802 becomes large also. Suppose that

it is over 18 volts, ZD801 conducts, pin 3 of I801 is pulled up over 1 volt. The pulse train at pin 6 goes down to zero, shutting Q803 off completely.

7.5 SCP : If output terminal is short to ground, photo transistor does not conduct, hence Q806 does not

conduct neither. The reference voltage +5V at pin 8 begins to charge on C829 and activates Q806 to conduct either. Then oscillation of I801 is stop, shutting Q803 off completely.

LCD 1550ME Power Board Block Diagram

Line Filter

Rec.

Filter

Power

Transformer

Output Rec. & Filter

PWM

Driver

3. On-screen circuit (Circuit diagrams Main PWB)

I306 (gmZAN1) Embeded function.

On-screen menu screen is established and the resultant data are output from I306 (Circuit diagram MAIN PWB, gmZAN1)

4. Video input circuit (Circuit diagram MAIN PWB)

The AC-coupled video signal is used to clamp the black level at 0V.

5. Definition converter LSI peripheral circuit (Circuit diagram MAIN PWB)

I306 gmZAN1 is the definition converter LSI.

The analog R,G,B signal input entered from the video input circuit is converted into the digital data of video signal through the incorporated A/D converter. Based on this conversion, this device performs interpolation during pixel extension. The source voltage for this device is 3.3V and the system clock frequency is 20MHz. The withstand voltage level for the input signal voltage is 3.3V and 5V.

7-4

6. System reset, LED control circuit (Circuit diagram MAIN PWB)

6.1 System reset

System reset is performed by detecting the rising and falling of the 5V source voltage at I301.

6.2 LED control circuit

Green / amber is lit with the control signal of the LED GREEN and LED AMBER signal pin 32, 33 from I302 (Circuit diagram MAIN PWB).

7. E2PROM for PnP (Circuit diagram MAIN PWB)

Data transfer between I304 and host.

There are two forms of communications protocol. In both, display capabilities are retrieved by the system software during the boot-up and configuration time.

For the PC platform, this software layer is defined in the VESA BIOS Extension / Display Data Channel, DDC2, standard.

8. E2PROM (Circuit diagram MAIN PWB)

Data transfer between I304 (24LC32) and CPU (I302) is effected through the IIC bus SCL (pin 14) and SDA (pin 13) of I302. The data to be transferred to each device are stored in I304.

 I303 control data.

 OSD related setting data.

 Other control data for service menu.

9. CPU circuit (Circuit diagram MAIN PWB)

I302 (MTV312MV64) functions as the CPU.

The source voltage for the device is 5.0V and the system clock frequency is 20MHz.

9.1 Detection of POWER switch status

The CPU identifies the ON status of the two power supplies. The identification is made when the power supply is turned off. For example, if the power supply is turned off with the POWER switch, the POWER switch must be turned on when activating the power supply again. If the power supply is turned off by pulling out the power cord, then this power supply can be turned on by connecting the power cord, without pressing the POWER switch.

9.2 Display mode identification

9.2.1 Functions

(1) Display mode identification

 The display mode of input signal is identified based on Table 1, and according to the frequency and

polarity (HPOL, VPOL) of horizontal or vertical sync signal, presence of the horizontal or vertical sync signal, and the discrimination signal (HSYNC_DETECT, VSYNC_DETECT).

 When the mode has been identified through the measurement of horizontal and vertical frequencies,

the total number of lines is determined with a formula of “Horizontal frequency / Vertical frequency = Total number of lines. “Final identification can be made by examining the coincidence of the obtained figure with the number of lines for the mode identified from the frequency.

 When the detected frequency if the sync signal has changed, the total number of lines should be

counted even through it is rge identified frequency in the same mode. Then, it is necessary to examine whether the preset value for the vertical display position of Item 4-3 has exceeded the total number of lines. If exceeded, a maximum value should be set up, which does not exceed the vertical display position of Item 4-3.

7-5

(2) Out of range

This out-of-range mode is assumed when the frequency of the horizontal / vertical signal is as specified below.

 Vertical frequency : Below 56.2Hz or above 75.1Hz

 Horizontal frequency : Below 31.5KHz or above 60KHz

(3) Power save mode.

The power save mode is assumed when the horizontal / vertical signals are as specified below.

 If there is no horizontal sync signal input.

 If there is no vertical sync signal input.

 If the horizontal sync signal outside the measuring range of gmZAN1.

 If the vertical sync signal outside the measuring range of gmZAN1.

Table 1

Polarity

Mode No Resolution

H-freq

(KHz)

Band Width

(MHz)

H V

1. 247 VGA 720 x 350 70Hz 31.47 28.322 + -

2. 102 VGA 720 x 400 70Hz 31.47 28.322 - +

3. 103 VGA 640 x 480 60Hz 31.47 25.175 - -

4. 182 MAC 640 x 480 66Hz 35 30.24 - -

5. 173 VESA 640 x 480 72Hz 37.86 31.5 - -

6. 109 VESA 640 x 480 75Hz 37.5 31.5 - -

7. 104 VESA 800 x 600 56Hz 35.16 36 + +

8. 116 VESA 800 x 600 60Hz 37.88 40 + +

9. 110 VESA 800 x 600 75Hz 46.88 49.5 + +

10. 117 VESA 800 x 600 72Hz 48.08 50 + +

11. 108 MAC 832 x 624 75Hz 49.72 57.283 - -

12. 118 VESA 1024 x 768 60Hz 48.36 65 - -

13. 217 SUN 1024 x 768 65Hz 52.45 70.49 - -

14. 157 VESA 1024 x 768 70Hz 56.48 75 - -

15. 141 VESA 1024 x 768 75Hz 60.02 78.75 + +

Attention:

1. When resolution beyond 1024 x 768 is inputted, resolution is lowered with Down scaling to 1024 x 768, and indicated, and OSD should indicate OUT of Range.

7-6

9.3 User Control

General Key Description

Exit : Turn off OSM menu, Exit sub menu.

Control : Move the green cursor and select control items.

Adjust : Change the value of each function / Enter to submenu / Proceed auto adjust / Proceed reset

Next : Move the NEXT tag

Reset : Reset the select item (Open reset warning before reset) / Mute the speaker / headphone

sound (short cut: when no OSM menu is shown)

9.3.1 Related ports of I306

Port Pin No. I/O Signal name Function Remarks

MFB1 112 1 RESET/

Mute

RESET switch input MUTE switch input

The set value is returned

to the initial value MFB5 107 1 EXIT EXIT switch input Withdraw from OSD MFB10 124 1 DOWN - switch input ( - )key MFB4 109 1 UP + switch input ( + )key MFB11 123 1 LEFT

3 switch input ( 3 )key

MFB3 110 1 RIGHT

4 switch input (4 )key

MFB2 111 1 NEXT NEXT switch input

9.3.2 Functions

Control is effected for the push-switches to be used when the user changes the parameters, in order to modify the respective setting values. Whether the switch has been pressed is identified with the switch input level that is turned “L”.

Each switch input port is pulled up at outside of MCU.

Each parameter is stored in the EEPROM, the contents of which are updated as required.

9.4 Control of definition converter MCU I306

9.4.1 Ports related to control

Pin No. I/O Signal name Function

101 I IRQ gmZan1 interrupt signal 103 O HCLK gmZan1 serial clock

99 I/O HDATA gmZan1 serial data 98 O HFS gmZan1 serial select

EXIT wCONTROL8 −ADJUST+ NEXT RESET/MUTE

NEC MultiSync LCD1550ME, MultiSync LCD1550ME(B), MultiSync LCD1550ME-BK(B) Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual