Mitsubishi DP750SB Service Manual

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PART NO. 599910596

SERVICE MANUAL

Diamond Pro 750SB

COLOR MONITOR

MODELS DPro 750SB (B)/-BK(B)

NEC-MITSUBISHI ELECTRIC VISUAL SYSTEMS CORPORATION

JUNE 2002

200207 08109705 08109730

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 associated with high voltage CRT circuit designs to

minimize danger to themselves and their coworkers. To avoid electrical shocks, this equipment should be used with an appropriate power code and be connected only to a properly grounded AC outlet. This equipment utilized a micro-gap power switch. Turn off the set by first pushing the front panel 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.

WARNING

PRODUCT SAFETY CAUTION

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

2. Comply with all caution and safety-related notes on the product display chassis and picture tube.

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

4. When servicing display monitor unit, it is required that the provided lead dress is used in the high voltage

circuit area.

5. It is also recommended that shatter proof gogg les are worn, when removing installing and handling the

picture tube. People not equipped with the proper precautionary measures mentioned should keep the picture tube away from body while handling.

6. 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.

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

8. X-radiation precaution

This product contains critical electrical and mechanical parts essential for X-ray protection. Normal anode voltage is 26.0 kV at zero beam picture tube current under AC 100-120V/220-240V input,

and anode voltage must not exceed the voltages shown below under any operation condition. To measure anode voltage set brightness for very dim picture, and use a high impedance volt meter

between chassis and anode lead and measure high voltage. If high voltage exceeds the specifications on the chassis schematic diagram, take the necessary

corrective action.

Table MAXIMUM ANODE VOLTAGE

beam current at 0 mA at 0.6 mA at 1.2 mA

A/B Ver. 31.0 kV 30.5 kV 30.5 kV

9. When you degauss the set with an external degaussing coil, you must keep strictly item “ * Notes about degaussing method “ of ADJUSTMENT Procedures.

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 DIAGRAMS .............................................................................................. 9-1

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

User's Manual

1. B Version

User’s Manual

1-1

Declaration of the Manufacturer

NERGYSTAR

We hereby certify that the colour monitor

Diamond Pro 750

/ Diamond Plus 93

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 Corporation

686-1, Nishioi Oi-Machi

Ashigarakami-gun

Kanagawa 258-8533, Japan

Product

As an E

NERGYSTAR

product meets the E

Partner, NEC-Mitsubishi Electronics Display of America, Inc. has determined that this

NERGYSTAR

guidelines for energy efficiency. The E

EPA endorsement of any product or service.

IBM is registered trademark 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. E

NERGYSTAR

NEC is a registered trademark of NEC Corporation. All other trademarks or registered trademarks are property of their respective owners.

User’s Manual

is a U.S. registered trademark.

1-2

NERGYSTAR

emblem does not represent

WARNING

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. EFRAIN FROM OPENING THE CABINET AS THERE ARE HIGH VOLTAGE COMPONENTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

CAUTION

RISK OF ELECTRIC SHOCK • DO NOT OPEN

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.

Canadian Department of Communications Compliance Statement

DOC: This Class B digital apparatus meets all requirements of the Canadian Interference-Causing

Equipment Regulations.

C-UL: Bears the C-UL Mark and is in compliance with Canadian Safety Regulations

according to C.S.A. C22.2 No. 950.

FCC Information

1. Use the attached specified cables with the Diamond Pro 750

/ Diamond Plus 93SB colour monitor so as

not to interfere with radio and television reception.

(1) Please use the supplied power cord or equivalent to ensure FCC compliance.

(2) Shielded captive type signal cable.

Use of other cables and adapters may cause intereference with radio and television reception.

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.

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

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.

Diamond Pro 750SB / Diamond Plus 93

1-3

Contents

Your new Diamond Pro 750

• Diamond Pro 750

• Power Cord

• Captive Signal Cable

• User’s Manual

• CD ROM with Setup Software, complete User’s Manual and other helpful files.

To see the User’s Manual, Acrobat Reader 4.0 must be installed on your PC.

/ Diamond Plus 93SB monitor box* should contain the following:

/ Diamond Plus 93SB Monitor with tilt/swivel base

Captive Signal Cable

* Remember to save your original box and packing material to transport or ship the monitor.

4 User’s Manual

Power CordUser’s Manual

CD-ROM

1-4

Quick Start

To attach the Diamond Pro 750SB / Diamond Plus 93SB monitor to your system, follow these instructions:

1. Turn off the power to your computer.

2. If necessary, install the display card into your system. For more information, refer to the display card manual.

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

For the Mac: Connect the Diamond Pro 750 to the monitor connector on the Macintosh (Figure B.1). Attach the 15-pin mini D-SUB end of the captive signal cable to the Diamond Pro 750 (Figure B.1). Tighten all screws.

4. Connect one end of the power cord to the Diamond Pro 750 end to the power outlet (Figure C.1).

5. Turn on the monitor (Figure D.1) and the computer.

NOTE: If you have any problems, please refer to the Troubleshooting section of this User’s Manual.

/ Diamond Plus 93SB Macintosh cable adapter (not included)

/ Diamond Plus 93SB Macintosh cable adapter on the computer

/ Diamond Plus 93SB monitor and the other

Figure A.1

15-pin mini D-SUB

Captive Signal Cable

Figure B.1

Mac Adapter (Not Included)

Captive Signal Cable

1-5

Diamond Pro 750SB / Diamond Plus 93

Quick Start

– continued

Power Outlet

Power Cord

Figure C.1

Power Button

User’s Manual

Figure D.1

1-6

Controls

OSM (On-Screen Manager) control buttons on the front of the monitor function as follows:

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Brightness/Contrast Controls

Brightness: Adjusts the overall image and background screen brightness. Contrast: Adjusts the image brightness in relation to the background. Degauss: Eliminates the buildup of stray magnetic fields which alter the correct scan of the electron beams

and affect the purity of the screen colours, focus and convergence. When activated, your screen image will jump and waver a bit as the screen is demagnetized.

Caution: Please allow a minimum of 20 minutes to elapse between uses of the Degauss Control.

Size and Position Controls

Left/Right: Moves the image horizontally (left or right). Down/Up: Moves the image vertically (up or down). Narrow/Wide: Decreases or increases the horizontal size of the image. Short/Tall: Decreases or increases the vertical size of the image.

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1-7

Diamond Pro 750SB / Diamond Plus 93

Controls

– continued

Color Control System

Colour presets selects the desired colour setting. The bar is replaced by the colour setting choice. Each colour setting is adjusted at the factory to the stated Kelvin. If a setting is adjusted, the name of the setting will change from Kelvin to Custom except sRGB mode.

Red, Green, Blue: Color Control System decreases or increases the monitor's red, green or blue colour guns depending upon which is selected. The change in colour will appear on screen and the direction (decrease or increase) will be shown by the bars.

sRGB mode: sRGB mode provides the suitable colour managed picture image. You can not change Red, Green and Blue colours, brightness and contrast individually.

Colour Temperature Adjustment: Adjusts the colour temperature of the screen image.

Geometry Controls

Geometry Controls Menu The Geometry controls allow you to adjust the curvature or angle of the sides of your display. Sides In/Out (pincushion): Decreases or increases the curvature of the sides either inward or outward. Sides Left/Right (pincushion balance): Decreases or increases the curvature of the sides either to the left

or right.

Sides Tilt (parallelogram): Decreases or increases the tilt of the sides either to the left or right. Sides Align (trapezoidal): Decreases or increases the bottom of the screen to be the same as the top. Rotate (raster rotation): Rotates the entire display clockwise or counterclockwise. Corner Correction: Allows you to adjust the geometry of the corners of your display – Top or Bottom.

Tools 1

Moiré Canceler: Moiré is a wavy pattern which can sometimes appear on the screen. The pattern is repetitive

and superimposed as rippled images. When running certain applications, the wavy pattern is more evident than in others. To reduce moiré, adjust the level by using –/+ CONTROL buttons.

Linearity: This selection allows you to adjust the spacing of the area on the screen. The purpose of this control is to ensure that a one-inch circle is a true one-inch circle wherever it is on the screen. The best way to determine the vertical linearity is as follows:

• Draw equally spaced horizontal lines using a drawing application that has a ruler.

• Use the Vertical Balance control to adjust the lines near the top and bottom of your screen.

• Use the LINEARITY (VER.) control to adjust the spacing between the lines near the center and top of your

screen.

Convergence (Diamond Plus 93

purpose of this control is to ensure that a white line drawn on the screen is as crisp and clear as possible.

• Use the CONVERGENCE (HOR.) control to adjust the alignment of the lines in the up/down direction.

• Use the CONVERGENCE (VER.) control to adjust the alignment of the lines in the left/right direction.

User’s Manual

only): Aligns all three colors (R,G,B) to form a single color (white). The

1-8

Controls

– continued

Tools 2

Language: OSM controls menus are available in 6 languages. OSM Position: You can choose where you would like the OSM controls menu to appear on your screen.

Selecting OSM Position allows you to manually adjust the OSM controls menu position from among Center, Top left, Top right, Bottom left and Bottom right.

OSM Turn Off: The OSM controls menu will stay on as long as it is in use. In the OSM Turn Off sub-menu, you can select how long the monitor waits after the last touch of a button for the OSM controls menu to disappear. The preset choices are 5 thru 120 seconds.

OSM Lock Out: This control completely locks out access to all OSM controls functions except Brightness and Contrast. When attempting to activate OSM controls while in the lock out mode, a screen will appear indicating that OSM controls are locked out. To activate the OSM Lock Out function, press SELECT and hold + down simultaneously. To deactivate the OSM Lock Out, press SELECT and hold + down simultaneously.

IPM System Off Mode: Enable: The IPM System works

Disable: The Off Mode of the IPM System

NOTE: For standard systems and graphics boards, keep the factory setting at ENABLE. EdgeLock Control: Operating your monitor at a nonstandard timing may cause images to appear darker than

normal or have color distortion. Use of the EdgeLock control will adjust images to their normal state.

Hot Key: This selection allows you to use as brightness control and –/+ as contrast control. Factory Preset: Selecting Factory Preset allows you a reset most OSM control settings back to the factory

settings. A warning statement will appear to confirm that you do want to reset ALL settings. Individual settings can be reset by highlighting the control to be reset and pressing the RESET button.

normally and all stages of energy savings are utilized.

is not used.

Information

Display Mode: Indicates the current mode and frequency setting of the monitor. Monitor Info: Indicates the model and serial numbers of your monitor. Refresh Notifier: A message will advise you if the refresh rate of the signal being applied to the monitor by

the computer is too low. For further information, please refer to your display card or system manual.

Diamond Pro 750SB / Diamond Plus 93

1-9

Recommended Use

Safety Precautions and Maintenance

FOR OPTIMUM PERFORMANCE, PLEASE NOTE

THE FOLLOWING WHEN SETTING UP AND USING THE

DIAMOND PRO 750

• 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.

• Keep the monitor away from high capacity transformers, electric motors and other devices such as external

speakers or fans, which may create strong magnetic fields.

• If possible, position the monitor so that it is facing the east to minimize the effects of the earth’s magnetic

field.

• Changing the direction of the monitor while it is powered on may cause image discolouration. To correct this,

turn the monitor off for 20 minutes before powering it back on.

• When operating the Diamond Pro 750

supply, use a power supply cord that matches the power supply voltage of the AC power outlet being used. The power supply cord you use must have been approved by and comply with the safety standards of your country. (Type H05VV-F should be used except in UK)

• In UK, use a BS-approved power cord with molded plug having a black (5A) fuse installed for use with this

monitor. If a power cord is not supplied with this monitor, please contact your supplier.

/ DIAMOND PLUS 93SB COLOUR MONITOR:

/ Diamond Plus 93SB with its AC 220 - 240 V worldwide power

Cleaning Your Monitor

A special coating is provided on the glass (CRT) surface of this monitor to reduce a reflection and static electricity on the glass surface. Due to the delicate coating on the glass surface, use a lint-free, non-abrasive cloth (cotton or equivalent) and a non-alcohol, neutral, non-abrasive cleaning solution to minimize dust. If the screen requires more than a light cleaning, apply a soft neutral detergent and water directly to a soft cloth and use it upon wringing water, to clean the glass surface. Clean your monitor regularly.

CAUTION:

Benzene, thinner, acid/alkaline detergent, alcohol detergent, detergent with abrasive powder, detergent with anti-static agent, detergent for cleaning.

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.

The following agents will cause damage to the CRT when cleaning the glass surface:

• 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

CAUTION

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.

User’s Manual

1-10

Recommended Use

CORRECT PLACEMENT AND ADJUSTMENT OF THE MONITOR

CAN REDUCE EYE, SHOULDER AND NECK FATIGUE. CHECK THE

FOLLOWING WHEN YOU POSITION THE MONITOR:

• 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

60 cm from your eyes. The optimal distance is 50 cm.

• Rest your eyes periodically by focusing on an object at least 6 meter 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 anti-glare

filter.

• Clean your monitor regularly. Use a lint-free, non-abrasive cloth and a non-alcohol, neutral, non-abrasive

cleaning solution or glass cleaner to minimize dust.

• 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.

• Get regular eye checkups.

Ergonomics

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

• Adjust the Brightness until the background raster disappears

• Do not position the Contrast control to its maximum setting

• Use the preset Size and Position controls with standard signals

• Use the preset Colour Setting and Sides Left/Right controls

• Use non-interlaced signals with a vertical refresh rate between 75 - 120 Hz

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

– continued

1-11

Diamond Pro 750SB / Diamond Plus 93

Specifications

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User’s Manual

1-12

Specifications

– continued

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NOTE: Technical specifications are subject to change without notice.

Diamond Pro 750SB / Diamond Plus 93

1-13

Features

SuperBright Diamondtron CRT: This patented flat aperture grille CRT delivers an exceptional viewing experi-

ence with unprecedented brightness and contrast and a virtually flat image that reduces distortion and glare so that what you see on-screen is what you get on your printed output. The state-of-the-art Mitsubishi PX-DBF electron gun and tight 0.25 mm grille pitch delivers precise focus for crisp, clear text and images.

SuperBright Mode : With the simple touch of a button, the brightness level of the Diamondtron CRT doubles. This function enhances the crispness of images for clarity-conscious applications such as graphics, animation and video.

Super Bright Mode OFF: for text based images (normal use) Super Bright Mode-1 ON: for images Super bright Mode-2 ON: for moving image such as DVD movies

OptiClear Screen Surface: Further reduces reflection and glare and increases contrast without sacrificing focus

level, clarity or brightness.

Dual Dynamic Beam Focus: Provides precise, continuous focus adjustments of the electron beams and optimum image quality, even to the far edges of the screen.

Color Control System with sRGB: Allows you to change between five colour settings on your display to match your personal preference. The sRGB-enabled colour matching setting found within Color Control helps achieve a consistent colour environment with other sRGB-enabled hardware and software applications.

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

ErgoDesign Features: Enhances 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/swivel base for preferred angle of vision, space-conscious cabinet design and compliance with MPRII 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.

Intelligent Power Manager (IPM) 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.

Reduced Magnetic Field Technology: Reduces magnetic and alternating electric field emissions and static electricity, addressing ergonomic concerns regarding potential risks from extended computer monitor use.

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.

User’s Manual

1-14

Troubleshooting

No picture

• Display card should be completely seated in its slot.

• Power Button and computer power switch should be in the ON position.

• Signal cable should be completely connected to display card/computer.

• Check connector for bent or pushed-in pins.

Image is scrolling or unstable

• Signal cable should be completely attached to the computer.

• Check pin assignments and signal timings of the monitor and your display card with respect to recommended timings and pin assignments.

• If the Macintosh cable adapter is used, check for proper connection or make sure the display card is Macintosh compatible and that the card is properly seated in the computer.

LED on monitor is not lit

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

Picture is fuzzy or colour looks blotchy

• Adjust Brightness and Contrast Controls or adjust the Moiré Canceler control.

• Access the Degauss Control through OSM controls. Activate the Degauss Control. CAUTION: A minimum interval of 20 minutes should elapse before the Deguass Control is used a second time when not switching between modes.

Picture bounces or a wavy pattern is present in the picture

• Move electrical devices that may be causing electrical interference away from the monitor.

• See inside cover of User’s Manual for FCC information.

Edges of the display image are not square

• Use the OSM Geometry Controls to straighten the edges.

• If possible, position the front of the monitor facing east.

Display image is not centered, too small, or too large

• Use the OSM Size and Position Controls to adjust the image.

Thin lines appear on your screen

• Thin lines are normal for an aperture grille CRT and are not a malfunction. These are shadows from the damper wires used to stabilize the aperture grille and are most noticeable when the screen’s background is light (usually white).

Black vertical lines are visible on the screen

• Thin vertical black lines on one or both sides of the screen. This minor condition is caused by grille element overlap which can occur during shipping.

• Position an open white window over the affected area of the screen and maximize the brightness and contrast controls. This will cause localized heating of the overlap which will clear in a few minutes. Be sure to readjust the brightness and contrast controls back to the normal viewing level after this procedure.

(no green, orange colour can be seen)

1-15

Diamond Pro 750SB / Diamond Plus 93

TCO’99

Diamond Pro 750SB / Diamond Plus 93

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).

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.

User’s Manual

1-16

TCO’99

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.

– continued

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.

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 Bio-accumulative.

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/

Diamond Pro 750SB / Diamond Plus 93

1-17

Serial Number Information

Refer to the serial number information shown below.

Manufactured Year : ( Last digit )

Manufactured Month :

January to September 1 to 9 October X November Y December Z

Factory Code :

EX.) SERIAL NUMBER LABEL

Model : Dpro750SB

: Dpro750SB-BK

SERIAL NO. :

g g g g g g g g g

Serial number(5 digits)

NPG China Factory (A/B/R ver.) :“Y”

Destination Code : USA : “A” Europe : “B” Australia : “R”

2-1

DISASSEMBLY

• Before you disassemble the set, turn off power and pull out the power plug.

• Use the appropriate screwdrivers that first the screws. If you use screwdriver that does not fit, you may

break the screws.

• Assembly is the opposite process of Disassembly.

• Carefully discharge the CRT anode potential by grounding to coating dag before removing Anode Cap.

Revolving Stand ASSY

1. Turn the monitor CRT face down on a clean static free surface to prevent scratching CRT face.

2. Remove with pulling up a Hooks and lifting a Revolving stand Assy to the upside.

Cabinet Back

1. Remove the two screws (PL-CPTS*4*12*15BF).

HOOK

Revolving stand Assy

screws (PL-CPTS*4*12*15BF)

3-1

CRT BOARD

1. Ten terminals are removed, and six solder is removed.

2. Disconnect the connectors “S201”, “S202”, “S203” and “GND”.

terminals solder

3. Unsolder the wires “White wire”, “Red wire” and “G2”.

S202 S201 S203

Red wire White wire GND G2

3-2

MAIN BOARD

1. Disconnect the connectors “S102”, “S701” and “GND”.

2. Remove the screw (P-#2CRBITS*3*8*15BF).

Screw S701 S101 GND

3. Remove the two screws (P-#2CRBITS*3*8*15BF), screw (PL-CPTS*3*8*15BF) and screw (PL-CPIMS*4*10*15BF).

Screw Screw (PL-CPIMS*4*10*15BF) (PL-CPTS*3*8*15BF)

Screw (P-#2CRBITS*3*8*15BF)

3-3

4. Disconnect the connectors “GND” and “S301”.

5. Remove the screw (P-#2CRBITS*3*8*15BF) and the screw (PL-CPTS*3*8*15BF).

6. Remove the Anode cap from CRT.

NOTE: Carefully discharge the CRT anode by shorting it to ground before removing anode cap.

Screw GND S301 Screw

7. Remove the two screws (PL-CPTS*4*12*15BF) and remove the Chassis Base from Cabinet Front ASSY.

screw (PL-CPTS*4*12*15BF)

3-4

8. Remove the eight screws (PL-CPTS*3*8*15BF) and remove the Main Board from Chassis Base.

screw (PL-CPTS*3*8*15BF)

3-5

ADJUSTMENT PROCEDURES

1. Adjustment & Inspection Tools............................................................................................ 4-2

2. Timing Table ...................................................................................................................... 4-2

3. Normal Condition Definition .............................................................................................. 4-2

4. Hot Key Operation ............................................................................................................. 4-3

5. B+ Check ........................................................................................................................... 4-5

6. X-RAY Test ........................................................................................................................ 4-5

7. H. V. B+ Confirmation ........................................................................................................ 4-5

8. H-Raster Center Adjustment ............................................................................................. 4-5

9. Preset Adjustment ............................................................................................................. 4-5

10. G2 Voltage Adjustment ................................................................................................... 4-5

11. White Balance Adjustment .............................................................................................. 4-6

Page

12. Focus Adjustment ........................................................................................................... 4-8

13. Purity Adjustment

14. Convergence Adjustment ................................................................................................ 4-9

15. Power saving Function Inspection .................................................................................. 4-9

16. Distortion Adjustment .................................................................................................... 4-10

17. Setting Before Shipment

18. Adjustment Magnetic Field ............................................................................................ 4-13

19. Timing Sheet ................................................................................................................. 4-14

............................................................................................................ 4-8

............................................................................................... 4-12

4-1

1. Adjustment & Inspection Tools

(A) Color Analyzer (B) Signal Generator CHROMA 2235 or compatible

(E) Convergence Meter (F) Degaussing Probe

(G) Power Meter

2. Timing Table (Factory Mode –18 Modes)

MODE RESOLUTION H-SYNC EREQ. V-SYNC FREQ H . POLARITY V . POLARITY

1 VGA400 31.4KHz 70Hz - +

2 VGA640*480 31.4KHz 60Hz - -

3 640*480(75) 37.5KHz 75Hz - -

4 640*480(85) 43.2KHz 85Hz - -

5 800*600(75) 46.8KHz 75Hz + +

6 MACII 49K 49.7KHz 75Hz - -

7 800*600(85) 53.6KHz 85Hz + +

8 1024*768(75) 60.0KHz 75Hz + +

9 1280*1024(60) 64.0KHz 60Hz + +

10 1024*768(85) 68.6KHz 85Hz + +

11 1280*1024(75) 79.9KHz 75Hz + +

12 1280*1024(85) 91.1KHz 85Hz + +

13 1600*1200(75) 93.7KHz 75Hz + +

14 1024*768(60) 48.3KHz 60Hz - -

15 800*600(60) 37.8KHz 60Hz + +

16 MACII 35K 35.0KHz 67Hz - +

17 MAC 1152*870 68.7KHz 75Hz - -

18 VGA720*400(70) 31.5KHz 70Hz - +

3. Normal Condition Definition

(A) Input AC Voltage 110V/60Hz.

(B) Warm up time minimum 30 minutes.

(D) All VR’s adjust to Center Position.

(F) Color temp 9300K

4-2

4. Hot Key Operation

(A) Factory Mode: power on + ‘+’ key + ‘−‘ key.

*To hide the Factory menu temporary in Factory mode:

Push "RESET" key once while Menu is displayed, then Menu disappears.

Push "RESET" key once more, then Menu reappears.

(B) Factory Menu

TAB 1) BRIGHTNESS / CONTRAST

: Brightness : Contrast

TAB 2) POSITION / SIZE

TAB 3) COLOR ADJUST

TAB 4) DISTORTION

: Left / Right (H.Position)

: Down / Up (V.Position)

: Narrow / Wide (H.Size)

: Short / Tall (V.Size)

VG: Vertical GAIN(Vertical Sub Size)

1: 9300K 2: 8200K 3: 7500K sRGB: sRGB 5: 5000K

: In / Out (Side Pincushion) : Left / Right (Pin Balance) : Tilt (Parallelogram) : Align (Trapezoid) : Rotate : Top Corner

: Bottom Corner

VF : Vertical Focus

: N/A : Red Gain : Green Gain : Blue Gain : Red Bias : Green Bias : Blue Bias : Brightness : Contrast

4-3

TAB 5) TOOLS 1

:Moire canceller

:Linearity(VER.)

:Linearity balance

TAB 6) TOOLS 2

TOOL 2 is as same as user mode

TAB 7) INFORMATION

DS :Destination

4-4

5. B+ Check

(A) Mode: No.12.

(B) Pattern: Full White. (Brightness set to cut off)

6. X-RAY Test

(A) Mode: No.12

(B) Pattern: Normal Crosshatch (Brightness just cut off)

Apply a jumper wire between TP1 and TP2 then power on, Monitor should be active in x-ray protector .

7. H. V. B+ Confirmation

(A) Mode: No.12

(B) Pattern: Full Black (Brightness just cut off)

Samsung CRT.

8. H-Raster Center Adjustment

(A) Mode: No.13

(B) Pattern: Crosshatch Reverse

(D) Adjust VR501 to make the raster mostly near center background position.

9. Preset Adjustment

(A) Mode No.12

(B) Pattern: Cross hatch

Parallelogram Top-corner, Bottom-corner, and rotation to make Picture Position Center and Picture Size 315*237mm.

10. G2 Voltage Adjustment

(A) Mode No. 12

(B) Pattern: Full Black

(D) Adjust screen VR to make G2 voltage 680V±10V for Mitsubishi CRT.

(E) Adjust screen VR to make G2 voltage 560V±10V for Samsung CRT.

4-5

11. White Balance adjustment

(A) Setting

Enter Factory Mode,

Mode: No.12, Pattern: Full White.

Warm up 60 min.

Make External Degauss.

(B) Cut Off Adjustment

1. Select the color Mode 9300K.

2. Cut Off Adjustment : Video Signal Off(0.Vp-p),Bright Control set to Max., Adjust G. Bias at the Brightness 3.4 ±0.7cd/m

(1FL ±0.2FL).

3. 9300K (Select color Mode 9300)

Set G. Bias to 15%, adjust R. Bias, B. Bias to make X=0.283, Y=0.297, with readjusting G. Bias to keep the brightness between 3.4 ±0.7cd/m2 (1FL ±0.2FL).

1. 9300K (Select color Mode 9300K)

1) Video Signal off (0.Vp-p), Contrast set to Max, Adjust Brightness to 0.1cd/m

2) 50*50mm Green block Pattern, Adjust G Gain to Y=92cd/m

3) 50*50mm White block Pattern, Adjust R, B Gain to x=0.283, y=0.297.

4) Adjust R, G, B gain again to meet following spec.

9300K x=0.283 ±0.010cd/m

y=0.297 ±0.010cd/m

Y=130 ±2cd/m

4-6

2. 5000K (Select color Mode 5000K)

1) Video Signal off (0.Vp-p), Contrast set to Max, Adjust Brightness to 0.1cd/m

2) 50*50mm Green block Pattern, Adjust G Gain to Y=71cd/m

3) 50*50mm White block Pattern, Adjust R, B Gain to x=0.345, y=0.359.

4) Adjust R, G, B gain again to meet following spec.

5000K x=0.345 ±0.010cd/m

y=0.359 ±0.010cd/m

Y>100cd/m

(D) “sRGB MODE” White Balance Adjustment (Select color Mode sRGB)

1) Video Signal off (0.Vp-p), Contrast set to Max, Adjust Brightness to 0.1cd/m

2) 50*50mm Green block Pattern, Adjust G Gain to Y=73cd/m

3) Change Pattern to white block. Adjust R, B Gain to x=0.313, y=0.329.

4) Adjust contrast to meet following spec.

(28FL)

sRGB x=313 ±0.010cd/m

y=329 ±0.010cd/m

Y=96 ±2cd/m

(E) “SB1, 2 MODE” White Balance Adjustment (Select the color Mode SB1, 2 MODE)

1) Select the color mode “SB1 Mode” by “Select” key when OSM is off.

2) Video signal off (0Vp-p), Adjust brightness to Y=0.1cd/m

3) Change pattern to 50*50mm white block, Adjust contrast control to Y=245 ±2cd/m

4) Change pattern to 32/255 gray. Adjust brightness to make 0.8cd/m

5) Select the color mode “SB2 MODE”.

6) Video signal off(0Vp-p), Adjust brightness to Y=0.1cd/m

7) Change pattern to 50*50mm white block, Adjust contrast control to Y=310 ±2cd/m

(F) ABL Adjustment and Brightness Preset

1) SB mode off, Color set to 9300K.Full White Pattern.

2) Brightness, contrast control to max., Adjust VR302 to Y=98 ±2cd/m

3) Brightness preset: set to Y=0.1cd/m

4-7

12. Focus Adjustment

(A) Mode: No.12, 9300K

(B) Pattern: Green Crosshatch, Brightness just cut off, Contrast maximum.

(D) Check T303 output voltage of the video range.

H-para=300V ±30V V-para=150V ±10V.

Horizontal Vertical

(E) Adjust F1 VR of FBT (lower side VR) for the vertical line to become fine line.

(F) Adjust F2 VR of FBT (higher side VR) for the horizontal line to become fine line.

(G) Receive Focus adjustment pattern.

(H) Adjust F1 VR if vertical black line is not falling out.

(I) Adjust F2 VR if horizontal black line is not falling out.

(J) Use the video card “Matrox G550”, and receive Microsoft Excel “Work sheet” (1280*1024(85)).

Make sure that there is no double line for horizontal at the center.

*Note: Focus adjustment must be finished at F1 VR.

The shape of black dot (1 dot) fall out.

The shape of black dot (2dots) fall out .

Black dot is fall out

F1 VR

F2 VR

G2 VR

Focus VR

13. Purity Adjustment

FOCUS ADJUSTMENT PATTERN

(1) Receive signal 12 (Cross hatch pattern).

(2) The CRT face should be facing east and degauss the entire unit by external degaussing coil.

(3) Make sure the single color purity.

If not, readjust CPC magnet and touch up using correction magnets.

4-8

14. Convergence Adjustment

CH : Convergence error of horizontal direction

CV : Convergence error of vertical direction

(1) Receive signal 12 (Cross hatch pattern).

(2) Measure convergence error. If it is out of spec, adjust convergence by 4-pole magnets and 6-pole

magnets.

236mm

315mm

A Zone (A circle 236mm in the center of the CRT face center)

CH, CV : Within 0.25mm

B Zone (Areas outside of zone A within the rectangle of 315mmx236mm)

CH, CV : Within 0.35mm

15. Power Saving Function Inspection

(A) Mode: No.13

(B) Pattern: Full white

(D) Inspection

1. It should be into power off Mode when the both horizontal sync and vertical sync are disable after

8 seconds. Check the LED color “Orange” and the power consumption must be less than 5W.

2. It should be recovered the normal Mode when the both horizontal sync and vertical sync are enable.

Check the picture is normal and LED color “Green”.

4-9

16. Distortion Adjustment

Factory mode setting

* After completion of adjustment exit the factory mode and data will be saved.

Signal: All signals Cross hatch

Perform the adjust for signal No.13 in step 1 ~ 3.

Perform the adjust for above all signal in step 4 ~ 5.

1. Rotation Adjustment

(1) Receive signal 13 (Cross hatch)

(2) Select the “ “ icon in OSM TAB 4.

(3) Make sure that the picture tilt meets the following standards.

2. Pincushion Balance Adjustment

(1) Select the “ “ icon in OSM TAB 4.

(2) Make sure that the Pincushion Balance meets the following standards.

X ≤ 1.0mm

A – B ≤ 0.5mm

A B

+ x

4-10

3. Parallelogram distortion Adjustment

(1) Select the “ “ icon in OSM TAB 4.

(2) Adjust “+”, “-“ SW so that the vertical line and horizontal line at the screen’s center fall at right angles.

(less than 90 ±0.5 degree)

4. Side Pincushion Adjustment

(1) Select the “ “ icon in OSM TAB 4.

(2) Make sure that the side pincushion distortion meets the following standards.

0.5mm

5. Trapezoid Distortion Adjustment

(1) Select the “ “ icon in OSM TAB 4.

(2) Make sure that the trapezoid distortion meets the following standards.

|(AB – CD)| ≤ 1.0mm

|(AC – BD)| ≤ 1.0mm

4-11

17. Setting Before Shipment

(A) Color Temp: 9300K(SB mode off).

(B) OSD position: Center of the screen

(D) H moire: Minimum

(E) Refresh Notifier: OFF

(F) OSD turn off time: 45 sec

(G) IPM off mode: Enable

(H) Language: English for A,B,C,R Version, Japanese for J Version.

(I) OSM Lock: OFF

(J) Edge Lock: Back

(K) Hot Key: “OFF” for A,J Version and “ON” for B,R Version.

4-12

18. Adjustment Magnetic Field

Vertical: +40uT, Horizontal: ±0uT(Neutral)

* Notes About Degaussing Method

Follow the degaussing procedure as below. (To prevent intertwinement of aperture grille.)

1) Use stick type degaussing probe at demagnetizing CRT.

Do not use ring type degaussing probe.

2) In order to remove a magnetization from front, top, bottom and side of CRT, and bottom chassis.

Do not switch off the degaussing probe abruptly. Move the degaussing probe slowly when degaussing.

Note: If switch off the degaussing probe near the set, the set will be magnetized.

3) Degaussing method

When switch on the degaussing probe, keep distance between panel surface and degaussing probe more than 50cm. Move the degaussing probe vertically facing to the panel surface.

Keep distance of panel surface and degaussing probe to more than 15mm.

Starting from edge of CRT, move the degaussing probe toward CRT center in circular motion, spending 6 to 7 seconds. (Rounding about 4 or 5 times.)

Ver tical

4) After sufficiently degaussing the CRT, move the degaussing probe slowly away from the panel surface

while rotating from corner to center, taking more than 3 seconds. Turn off SW more than 1m away from the CRT. Degauss again if the unit is magnetized.

Over 1m

SW OFF

Magnetized Pattern Example

Horizontal

4-13

19. TIMING SHEET

(

(H)

Preset Mode No.

Signal Name

Resolution

Dot Clock (MHz

fh (kHz)

fv (Hz)

Tot al

Disp (dot)

Front (dot)

Sync Pulse (dot)

Back (dot)

Tot al

Disp (H)

Front (H)

Sync Pulse (H)

(mS)

Back (H)

(mS)

Interlace

Polarity (H/V)

Composite Sync

Composite Video

Character Font

Serration

EQP

dot)

(uS)

(mS)

1 2 3 4 5 6

VGA VGA VESA VESA VESA (MAC)

640*400 640*480 640*480 640*480 800*600 832*624

(75) (85) (75) (75)

640*400 640*480 640*480 640*480 800*600 832*624

25.175 25.175 31.500 36.000 49.500 57.283

31.47 31.469 37.50 43.269 46.875 49.725

70.09 59.940 75.00 85.008 75.00 74.550

31.78 31.778 26.667 23.111 21.333 20.111

25.42 25.422 20.317 17.778 16.162 14.523

14.268 16.683 13.333 11.764 13.333 13.414

12.711 15.253 12.800 11.093 12.800 12.549

0.381 0.318 0.027 0.023 0.021 0.020

0.064 0.064 0.080 0.069 0.064 0.060

1.112 1.049 0.427 0.578 0.448 0.784

NON NON NON NON NON NON

NEG/POS NEG/NEG NEG/NEG NEG/NEG POS/POS NEG/NEG

7*9 7*9 7*9 7*9 7*9 7*9

OFF OFF OFF OFF OFF OFF

800 800 840 832 1056 1152

640 640 640 640 800 832

0.64

96 96 64 56 80 64

3.18 3.813 2.032 1.556 1.616 1.117

48 48 120 80 160 224

1.91 1.907 3.810 2.222 3.232 3.910

449 525 500 509 625 667

400 480 480 480 600 624

12 10 1 1 1 1

2 2 3 3 3 3

35 33 16 25 21 39

0.636

0.508

1.556

0.323

0.559

4-14

(

(H)

Preset Mode No.

Signal Name

Resolution

Dot Clock (MHz)

fh (kHz)

fv (Hz)

Tot al

dot)

(uS)

7 8 9 10 11 12

VESA VESA VESA VESA VESA VESA

800*600 1024*768 1280*1024 1024*768 1280*1024 1280*1024

(85) (75) (60) (85) (75) (85)

800*600 1024*768 1280*1024 1024*768 1280*1024 1280*1024

56.250 78.750 108.000 94.5 135.0 157.5

53.674 60.023 63.981 68.677 79.976 91.146

85.061 75.029 60.020 85 75.025 85.024

1048 1312 1688 1376 1688 1728

18.631 16.660 15.630 14.561 12.504 10.971

Disp (dot)

(uS)

14.222 13.003 11.852 10.836 9.481 8.127

Front (dot)

(uS)

0.569 0.203 0.444 0.508 0.119 0.406

Sync Pulse (dot)

(uS)

1.138 1.219 1.037 1.016 1.067 1.016

Back (dot)

2.702 2.235 2.296 2.201 1.873 1.422

11.756 13.328 16.661 11.765 13.329 11.761

Tot al

(uS)

(mS)

Disp (H)

(mS)

11.179 12.795 16.005 11.183 12.804 11.235

Front (H)

(mS)

0.019 0.017 0.016 0.015 0.013 0.011

Sync Pulse (H)

(mS)

0.056 0.050 0.047 0.044 0.038 0.033

Back (H)

(mS)

Interlace

Polarity (H/V)

Composite Sync

Composite Video

Character Font

Serration

EQP

0.503 0.466 0.594 0.524 0.475 0.483

NON NON NON NON NON NON

POS/POS POS/POS POS/POS POS/POS POS/POS POS/POS

7*9 7*9 7*9 7*9 7*9 7*9

OFF OFF OFF OFF OFF OFF

800 1024 1280 1024 1280 1280

32 16 48 48 16 64

64 96 112 96 144 160

152 176 248 208 248 224

631 800 1066 808 1066 1072

600 768 1024 768 1024 1024

1 1 1 1 1 1

3 3 3 3 3 3

27 28 38 36 38 44

4-15

(

(H)

Preset Mode No.

Signal Name

Resolution

Dot Clock (MHz)

fh (kHz)

13 14 15 16 17 18

VESA VESA VESA MAC MAC VGA

1600*1200 1024*768 800*600 640*480 1152*870 720*400

(75) (60) (60) (67) (75) (70)

1600*1200 1024*768 800*600 640*480 1152*870 720*400

202.5 65.0 40.0 30.24 100 28.322

93.75 48.36 37.8 35.0 68.681 31.469

fv (Hz)

Tot al

dot)

(uS)

Disp (dot)

(uS)

2160 1344 1056 864 1456 900

10.667 20.68 26.40 28.57 14.560 31.777

1600 1024 800 640 1152 720

7.901 15.75 10.0 21.16 11.52 25.422

Front (dot)

(uS)

Sync Pulse (dot)

(uS)

Back (dot)

(uS)

Tot al

(mS)

Disp (H)

(mS)

0.316 0.37 1.00 2.12 0.320 0.636

192 136 128 64 128 108

0.948 2.09 3.20 2.12 1.280 3.813

304 160 188 96 144 54

1.501 2.46 2.20 3.17 1.440 1.907

1250 806 628 525 915 449

13.333 16.667 16.579 15.000 13.322 14.268

1200 768 600 480 870 400

12.800 15.880 15.840 13.714 12.667 12.711

Front (H)

(mS)

0.011 0.062 0.026 0.086 0.044 0.381

Sync Pulse (H)

(mS)

0.032 0.124 0.106 0.086 0.044 0.064

Back (H)

(mS)

Interlace

Polarity (H/V)

Composite Sync

Composite Video

Character Font

Serration

EQP

0.491 0.600 0.607 1.114 0.568 1.112

NON NON NON NON NON NON

POS/POS NEG/NEG POS/POS NEG/NEG NEG/NEG NEG/POS

YES YES

7*9 7*9 7*9 7*9 7*9 7*9

OFF OFF OFF ON ON ON

OFF OFF OFF OFF OFF OFF

75 60 60 66.67 75.062 70.087

64 24 40 64 32 18

1 3 1 3 3 12

3 6 4 3 3 2

46 29 23 39 39 35

4-16

INSPECTION

1.Scope --------------------------------------------------------------------------------------------------------------- 5-2

1.1 Introduction --------------------------------------------------------------------------------------------------- 5-2

1.2 General Description ---------------------------------------------------------------------------------------- 5-3

1.3 Regulations -------------------------------------------------------------------------------------------------- 5-4

1.4 Regulation Information & Marking Location ---------------------------------------------------------- 5-5

2. CRT Specifications ---------------------------------------------------------------------------------------------- 5-6

3. Electric Specifications ------------------------------------------------------------------------------------------ 5-7

3.1 Deflections --------------------------------------------------------------------------------------------------- 5-7

3.2 Signal Input --------------------------------------------------------------------------------------------------- 5-7

3.3 Video Performance ----------------------------------------------------------------------------------------- 5-7

3.4 Power Supply ------------------------------------------------------------------------------------------------ 5-8

3.5 Power Saving ------------------------------------------------------------------------------------------------ 5-8

3.6 Degaussing -------------------------------------------------------------------------------------------------- 5-9

4. Functions ---------------------------------------------------------------------------------------------------------- 5-9

4.1 Display Part -------------------------------------------------------------------------------------------------- 5-9

5. Display Quality --------------------------------------------------------------------------------------------------- 5-18

Page

5.1 Basic Test Conditions ------------------------------------------------------------------------------------- 5-18

5.2 Picture Size and Position --------------------------------------------------------------------------------- 5-18

5.3 Luminance (Brightness) ----------------------------------------------------------------------------------- 5-19

5.4 Color ----------------------------------------------------------------------------------------------------------- 5-20

5.5 Geometric Distortion --------------------------------------------------------------------------------------- 5-21

5.6 Linearity ------------------------------------------------------------------------------------------------------- 5-22

5.7 Misconvergence --------------------------------------------------------------------------------------------- 5-23

5.8 Focus ---------------------------------------------------------------------------------------------------------- 5-23

5.9 Halo ------------------------------------------------------------------------------------------------------------ 5-24

5.10 Raster Regulation ----------------------------------------------------------------------------------------- 5-24

6. CRT Limits of Screen and Faceplate Blemish ------------------------------------------------------------ 5-25

6.1 CRT Face plate defect ------------------------------------------------------------------------------------ 5-25

6.2 AR-film's surface defect -------------------------------------------------------------------------------------- 5-26

7. Inspection of PLUG & PLAY Communication and OSM "MONITOR INFORMATION" for

Model Name/ Serial Number ---------------------------------------------------------------------------------- 5-29

7.1 A System Construction ----------------------------------------------------------------------------------- 5-29

7.2 Input Signal --------------------------------------------------------------------------------------------------- 5-29

7.3 Programs Required ---------------------------------------------------------------------------------------- 5-29

7.4 Inspection Procedures ------------------------------------------------------------------------------------- 5-29

7.5 Error Messages --------------------------------------------------------------------------------------------- 5-31

7.6 EDID Data File ---------------------------------------------------------------------------------------------- 5-31

5-1

1.Scope

1.1 Introduction

This document defines the design and performance requirements for a 17 inch (16inch Viewable), color display

monitor. This monitor uses a 17 inch Flat AG Trio (Aperture Grille) type CRT. This monitor is capable of

maximum resolution of 1600 x 1280 pixels at 76 Hz non-interlaced mode, and is capable of horizontal

frequencies between 30kHz and 96kHz.

The manufacture assumes the responsibilities for the design and assembly of the power supply and deflection

circuits and the integration of these components with the CRT/yoke assembly and all mechanical parts, to

meet the requirements of this specification.

The following list shows the model name, Cabinet color, Audio function, brand and market.

MODEL NAME Cabinet

color

Dpro750SB DAS/LG No Europe Bver. Dpro750SB-BK DAS/B No Europe Bver. Dpro750SB DAS/B No Australia Rver.

* “DAS” : Dark Roof Gray

Audio Base

MARKET Ver.

“LG” : Light Gray

“B” : Dark Roof Gray

5-2

1.2 General Description

(

)

Item Vendor / Model No. Type

Mitsubishi / M41LRY61X31 Diamondtron M2 (Aperture Grille)

Spec. REMARKS

Size 43cm / 406mm Diagnonal Viewable Image

1CRT

17" / 16" Diagnonal Viewable Image

Grill Speacing(Phosphor Spacing) Approx. 0.25mm (Approx. 0.26mm) Aperture Grille Phosphor Type B22 Face-plate AR-film (Anti-Refection and Anti-Static Film) Electron Gun Type PX-DBF Face-plate Transmission approx.38% (Includidng face-plate coating)

2 SCANNING Horizontal Freq 30.0k - 96.0kHz

Vertical Freq 50 - 160Hz

3 SIGNAL INPUT Video Analog 0.7Vp-p

Sync Composite Sync TTL Pos / Neg

Separate Sync TTL Pos / Neg Termination Video 75 ohm to GND (Impedance) Sync. 2.2K ohm to GND or more

4 SCREEN Display Resolution(Maximum) 1600 ×1200 76Hz (Maximum)

CHARACTERISTICS 1280 x 1024 85Hz (recommend)

Display Size Preset 315 mm(H) * 236 mm(V)

Full Scan 325 mm(H) * 244 mm(V) Misconvergence Center: 0.25 mm , Corner : 0.35 mm Brightness (Full White) 90cd/m

at 9300K (Cont:MAX Bri:Preset)

5 CONTROL Front Power SW

(User Controls)

6 CONNECTOR Power Input

Signal Input

OSM

Exit, Left, Right,

Note: User can change Super Bright Mode by pressing a Select key.

Brightness , Contrast , Degauss

H.Size, V.Size, H.Posi tion, V.Positi on

Color Control (9300K, 8200K, 7500K, sRGB, 5000K)

Color Temperatur e Adjust, Color Gain Adjust

Geometry : 7ways (Si de Pin In/ Out , Side Pin Left/ Right , Parallel ogram,

Trapezoid, Rot ation, TopPin In/Out , BottomPin In/Out )

Moire Canceler ( Horizontal ), Linear rity(Vertical), Vert ical Balance

Language select (6:E/G/ F/SP/IT/JA), OSM position, OSM turn off,

OSM lock out, I PM System, Clamp Pulse Position, Hot Key, Factor y Preset

Display mode, Monitor info., Refresh notifire, URL indication

Diagnosis i ndication

Power Cord (Length:1. 8m, Color: Haze Gray) Mini 15pin D-sub (Length:1.8m, Color:Haze Gray)

, +, Select, Reset

7 POWER SUPPLY Operating Range AC100-240V, 50/60Hz

Power Consumption (Max.) 75W 1.9A@100-240VAC

Power save < 5W

8 ENVIRONMENTAL Operating temperature 5- 35

CONDITION Relative humidity 10 - 90 % (without condensation)

9 WEIGHT Net : 17.2kg / 37.9lbs, Gross : 20.2kg / 44.5lds

10 DIMENSIONS Cabinet with Tilt / Swivel stand Net : W 397mm(15.6"), H 392mm(15.4"), D 415.5mm(16.4")

Carton

Gross(Aver.): W 530mm(20.9"), H 520mm(20.5"), D 565mm(22.2") Gross(B/R/Jver.): W 510mm(20.1"), H 513mm(20.2"), D 565mm(22.2")

11 REGULATION Safety UL1950(UL), CSA C22.2 No.950(C-UL),

EN60950(TUV-GS), CCIB, PCBC, GOST, PSB

EMC FCC-B, DOC-B, EN55022-B, EN61000-3-2,-3-3,

EN55024(IEC61000-4-2,-4-3,-4-4,-4-5,-4-6,-4-8,-4-11), C-tick, CCIB, VCCI-B, JPHG

X-Ray DHHS, Red Act, PTB

pr EN50279(MPR-lll), TCO'99, TCO95(for Aver. Black)

VLF / ELF

JEIDA-G15-1996 Power Management International Energy Star Office Equipment Program Ergonomics TUV-GS (ISO9241-3, ISO9241-7, ISO9241-8),

TCO'99, TCO95(for Aver. Black) Miscellaneous TCO'99, TCO95(for Aver. Black), CE marking, JEIDA-G11-1996 Others WHQL (Win ME, Win 2000, Win XP)

12 OTHERS Plug & Play DDC2B,DDC/CI (Support 9pin-5V)

Self Diagnosis

13 FEATURE

Super Bright Mode

7 control buttons

5-3

1.3 Regulations

REGULATIONS GEOGRAPHICAL

REGION

DPro750SB(B) UL

SAFETY EMC X-RAY ELF/VLF* Power

Management

C-UL

TUV-GS

PCBC

Gost

PSB

CCIB

CCEE

EN55022-B

EN55024

EN61000-3-2

EN61000-3-3

C-tick

PTB

MPR-III

TCO’99

Energy Star

TCO’99

*: This model is applied these regulations in case of including the audio base.

Ergonomics Miscellaneo

And others

TUV-GS

(IS9241-3

IS9241-7

IS9241-8)

TCO’99

WHQL

(Win ME,

Win 2000,

Win XP)

5-4

1.4 Regulation Information & Marking Location

Marking

Location

(1) UL UL1950 3rd Edition (or UL60950 3rd edition)

(1) C-UL CAN/CSA-C22.2 NO.950:1995 (or CAN/CSA-C22.2 No.60950:2000)

(1),(2) TUV-GS EN60950 : 1992 & AD1/AD2/AD3/AD4/AD11(or EN60950:2000),

(1) PSB Singapore Safety

(1) CCIB Chinese Safety & EMI

(1),(2) FCC 47 CFR Chapter I Part15 Subpart B, Class B

- DOC Interference-Causing Equipment Standard ICES-003 Issue 3,Class B

- DHHS 21CFR Chapter I Subchapter J

- Red Act Radiation Emitting Devices Act

- PTB German X-ray

- MPR-III prEN50297

- TCO’95 Requirements for environmental labeling of personal computers

(1),(2),(3) TCO’99 Requirements and test methods for environmental labeling of

(1),(2),(3) CE-Marking EN60950: 1992 & AD1/AD2/AD3/AD4/AD11(or EN60950 : 2000)

(1),(2),(3) Energy Star International Energy Star office Equipment Program

(2) PCBC Poland Safety

(1),(2),(3) Gost Russian Safety

(1),(2),(3) C-tick AS/NZS3548:1995+A1/A2:1997

(1),(2) JPHG

- JEIDA

- WHQL

Note:

(1) The mark is printed on the “ Rating Label ”. (2) The mark is printed on the “ Carton Box ”. (3) The mark is printed on the “ User’s Manual ”.

Regulation Information

EK1-ITB 2000, ISO9241-3: 1992, ISO9241-7: 1998, ISO9241-8: 1997

display(CRT) and Ecology

EN55022: 1998 Class B,

EN55024: 1998(IEC61000-4-2,-4-3,-4-4,-4-5,-4-6,-4-8,-4-11)

EN61000-3-2 : 1995 & AD1/AD2, EN61000-3-3 : 1995

(Japan Power Harmonics Guidelines) Guidelines for the suppression of Harmonics in Household and General – Use Equipment JEIDA-G-15-1996: Guide Line for Low Frequency electromagnetic field JEIDA-G11-1996: Guide Line for Electrostatic Field Emission. Microsoft Windows® Hardware Quality Labs

5-5

2. CRT Specifications

Vendor Mitsubishi

CRT Model No. M41LRY61X31

Type Diamondtron NF (Aperture Grille)

Size

Dot pitch 0.25mm

Phosphor Spacing 0.26mm

Deflection Angle 90 degree

Phosphor Type B22 Electron Gun Type PX-DBF type

45cm/41cm Diagonal View able Image (17”/16” Diagonal Viewable Image)

Light Transmission at Center (Approx.) Face-plate

Useful Screen dimensions 325.1x 243.8 mm

Face-plate Curvature H: R=50000 mm , V: R=80000 mm

Phosphor Color Coordinate

Approx.38% (Include Face-plate coating)

AR-film (Anti-reflection and Anti-static)

R: X=0.626 , Y=0.338 G: X=0.278 , Y=0.601 (Typical) B: X=0.150 , Y=0.068

5-6

3. Electric Specifications

3.1 Deflections

Horizontal

Vertical

Scanning Frequency 30.0 – 96.0 kHz

Back Porch

Blanking H-sync Width

Scanning frequency 50 – 160 Hz

V-sync + V-back Porch

V-sync Width

V-Total Line

≥ 1.1 µsec

≥ 2.5 µsec

0.9 µsec

≥ 450 µsec

2H ≤ Vs ≤ 8H or 100 µsec

≥ 256H+ V-sync Width

3.2 Signal Input

Video Input Signal R.G.B analog

Sync. Input Signal

Video Input Impedance 75 ohm to ground

Sync. Input Impedance 2.2k ohm to ground or more.

Signal Level

External composite sync. TTL (P or N) External HD/VD separate sync. TTL (P or N)

Video signal : 0.70V p-p ±5% Composite sync. :TTL level (>2.5V) Separate H/V-sync. :TTL level (>2.5V)

3.3 Video Performance

Video Clock Frequency 210.0MHz (Input signal) Pulse Rise and Fall time 6.0nsec (typ.) 10 to 90% at 40Vp-p

The rise and fall time of the input video signal is 2.0nsec or less.

The pulse rise or fall time is determined using the formula :

Where : Ta = Amplifier rise / fall time

Tm = Measured rise / fall time

Ts = Input signal rise / fall time

Tp = Probe effect on rise / fall time = 2.2 x Rl x Cp

Rl = Amplifier output resistance (ohm)

Cp = Total probe capacitance (F)

Tsc= Scope rise / fall time = 0.35 / Scope bandwidth (MHz)

2222

)(

TscTpTsTmTa ++−=

5-7

3.4 Power Supply

Input Voltage 100 – 240 VAC ± 10%

Frequency 50/60Hz ± 3Hz

Power Consumption (Max.)

Condition (Monitor):

(Typical)

Condition (Monitor):

AC leakage current Except Japan ≤ 3.5mA(259V), Japan ≤ 0.25mA(105V)

Inrush current

75W 100 – 240VAC, 1.9A

Input voltage:100-240VAC

Signal: No.13 (1600x1200 (75Hz), (All white))

Contrast: Max, Brightness: Max,

SB Mode: ON

H/V size: full scan

Others: default position

68W

Input voltage: 100-240VAC

Signal: No.12 (1280x1024 (85Hz), (All white))

Contrast: Max, Brightness: Cut off

SB Mode: OFF

H/V size: Preset

Others: default position

≤ 42A 0-peak at 240VAC on cold starting

(or ≤ 30Arms(half cycle) at 240VAC on cold starting)

≤ 100A 0-peak at 240VAC on hot starting

(or ≤ 70Arms(half cycle) at 240VAC on hot starting)

3.5 Power Saving

ON Mode On On Active

Off

Mode

H-sync V-sync Video Power

Off On Blank

On Off Blank

Off Off Blank

Recovery

Consumption

75W (Max.)

≤ 5W 3 - 5 sec Orange

Time

- Green

LED

Indicator

5-8

3.6 Degaussing

Auto Degaussing

The monitor has an automatic degaussing function which activates when the unit is turned on.

Manual Degaussing This activates degaussing at the user’s discretion after

the unit is operating

The Monitor requires minimum 15 minutes after last degauss operation for full degauss capability.

4. Functions

4.1 Display Part

4.1.1 Front Controls

a : POWER SWITCH

b : POWER INDICATOR

c : EXIT BUTTON

d : ITEM SELECT BUTTONS

EXIT

e : FUNCTION ADJUST BUTTONS

SELECT

RESET

f : SELECT BUTTON

g : RESET BUTTON

5-9

4.1.2 OSM (On-Screen Manager) Function

4.1.2.1 OSM Menu

Tab 1

Tab 2

Tab 3

Tab 4

5-10

Tab 5

Tab 6 Tab 6 (Language)

Tab 6 (OSM Position) Tab 6 (OSM Turn off)

Tab 6 (OSM Lock) Tab 6 (IPM OFF Mode)

5-11

Tag6 (Edge Lock) Tag6 (Hot Key)

Tab 6 Factory Preset

Tab 7 (URL indication) Tab 7 (Display Mode)

Tab 7 (Monitor info.)

5-12

Tab 7 (Refresh Notifier) Refresh Notifier

Item Reset Tab Reset

Factory Preset

5-13

Others

5-14

4.1.2.2 OSM Item variability & Default position.

Tab Item Default Item

Reset

1 Brightness 0-100% 50%

Contrast 0-100% 100% Yes Up Down Degauss - - - Operate -

2 Left/Right (H.Posi) 0-100% Adjusted Yes Right Left

Down/Up (V.Posi) 0-100% Adjusted Yes Up Down

Narrow/Wide (H.Size) 0-100% Adjusted Yes Big Small

Short/Tall(V.Size) 0-100% Adjusted Yes Big Small

3 1(9300K) Yes - -

2(8200K) Yes - -

Color Number 3(7500K) 1(9300K) Yes - -

4(sRGB) Yes - -

5(5000K) Yes - -

Color Temperature 5000K-9300K 1:9300K

R/G/B gain control 0-100% Adjusted Yes Up Down

4 In/Out (Side_Pin) 0-100% Adjusted Yes

Left/Right(SidePinBalance) 0-100% Adjusted Yes

Tilt (Parallelogram) 0-100% Adjusted Yes

Align (Trapezoidal) 0-100% Adjusted Yes

Rotate 0-100% Adjusted Yes

Top(Top comer) 0-100% Adjusted Yes Big Small Bottom(Bottom comer) 0-100% Adjusted Yes Big Small

5 Moire Canceler (Hor) 0-100% 0% Yes Increase Decrease

Moire Canceler (Ver) (SM-CRT model only) Linearity 0-100% Adjusted Yes

0-100% Adjusted Yes

Language

OSM Position 5 position Center Yes Cursor move to +/ OSM Turn off 5-120 sec. 45sec Yes Turn off

OSM Lock OFF/ON OFF No Lock on: "Select" + "+"key IPM OFF Mode Enable/

EDGE LOCK Front/Back Back Yes Cursor move to +/HOT KEY OFF/ON OFF(A,J)

Factory Preset - - - All Reset

7 URL indication A/B/Rver : WWW.NECMITSUBISHI.COM

Jver. : WWW.NMV.CO.JP Display Mode FH : Horizontal Frequency & Polarity FV : Vertical Frequency & Polarity Monitor Info. Model Name & Serial Number Refresh Notifier OFF/ON OFF - Cursor move to +/-

0-100% 0% Yes Increase Decrease

English /

German /

French /

Spanish / Italian

/ Japanese

Disable

(Normal, SB

mode2)

Adjusted

(SB mode1)

2:8200K 3:7500K 5:5000K

English (A,B,R)

Japanese

(J)

(Enable)

ON(B,R)

Yes Up Down

Yes High Low

No Cursor move to +/-

Push"+" Push"-"

Time shorter

Turn off

Time longer

5-15

Default show factory shipping condition.

4.1.3 Back Panel

a: AC POWER CONNECTOR (3P IEC Plug)

b: SIGNAL INPUT CONNECTOR pig-tail type (D-SUB 15P)

Signal Cable: Length:1800 ±50mm, Color: Hazegray (NEC#8508)

4.1.4 Connector Pin Assignment

1) Signal Input Connector (mini D-sub 15P pig-tail cable)

Pin Signal

1 Red-video 2 Green-video 3 Blue-video 4 Gnd 5 DDC Gnd 6 Red Gnd 7 Green Gnd 8 Blue Gnd

9 DDC +5V 10 Sync Gnd 11 Gnd 12 Serial data

13 H-sync or Composite sync 14 V-sync(v-clock) 15 Serial clock

Signal Cable Connector

5-16

4.1.5 DDC (Display Data Channel) Functions

VESA DDC 2B (EDID data only) , (Support 9pin-5V)

VESA DDC/CI

4.1.6 Preset Timing

Factory-presets : 14 signals (See 19. Timing sheet of ADJUSTMENT PROCEDURES for detail timing

parameters.)

(Signal No. 2 to No.8, No.10 to No.13, No.16 to No.18 are adjustment Signals.)

User-presets : 10 (F.I.F.O)

Preset Timing Discrimination

Horizontal Frequency

Vertical Frequency Sync Signal Polarity H or V-sync signal polarity is different

* The monitor is able to discriminate input signals by at least one of above parameters.

≥ 1kHz

≥ 1Hz

5-17

5. Display Quality

5.1 Basic Test Conditions

AC Voltage 120VAC 60Hz or 230VAC 50Hz

Video Signal

Picture Reverse cross hatch pattern

Warm Up More than 30 min. with full white picture

Temperature 20 – 25 degree C

Relative Humidity 40 - 80 %

Magnetic Field

Contrast & Brightness

Display Size 315 x 236 mm for 4:3 aspect ratio Ambient light Luminance Meter Minolta CA100 or Equivalent

If no description, the test below are applied under the Basic Test Condition.

Unless specified, the monitor is set at the factory default setting.

No.12, 1280 x 1024 (85Hz) (fH=91.1kHz fV=85Hz) Video signal 0.70 ±0.01Vp-p

BH=0.000mT, BV=0.040mT (Northern Hemisphere) BH=0.000mT, BV=-0.040mT (Southern Hemisphere) Contrast maximum and Brightness default position (Cut off)

200 ± 50 lx

5.2 Picture Size and Position

Adjustment Signal: Signal No.1 to 14

Figure

5.2.1 Size and Position Control Ranges

Signal No.1 to 14

Size Control Ranges

Size

Position

236 mm

The horizontal and vertical size control should be controllable to “FullScan” at the maximum position.

Horizontal : 315mm ± 3.0 mm Vertical : 236mm ± 3.0 mm

Horizontal : | XLef t – Xright | ≤ 3.0mm Vertical : | XTop - XBottom | ≤ 3.0mm The picture should adjust underscan.

XTop

Bezel

XLeft

XBottom

315 mm

Video

XRight

Signal No.1 to 14

Position Control Ranges

Image position can be controlled to the center position of the bezel opening.

5-18

5.3 Luminance (Brightness)

Signal No.13 (VESA1280*1024@85Hz)

5.3.1 Luminance at CRT center (Full white pattern)

5.3.2 Luminance at CRT center

(Window pattern)

(H:33%,V:33%)

5.3.3 Luminance Variation

(Full white pattern)

Contrast : MAX Brightness : Adjust to 100cd/m

5.3.4 Back Raster Luminance

(Full black pattern)

Contrast : Max. Brightness : default position

85cd/m

≤ Full White ≤ 100 cd/m

(at 9300K + 8 M.P.C.D.)

* When Brightness control to MAX, the luminance should

be over 124cd/m

SB Mode : OFF Contrast : Max. Brightness : default position

120 cd/m

≤ Window pattern ≤ 150 cd/m

(at 9300K + 8 M.P.C.D.)

SB Mode 1 Contrast : Max. Brightness : default position (Adjust to 0.8 cd/m

Window pattern = 230 cd/m

at 2/15 gray(32/255 gray)*1)

-0, +30 cd/m2

(at 9300K + 8 M.P.C.D.)

SB Mode 2 Contrast : Max. Brightness : default position (Cut off)

Window pattern = 300 cd/m

-0, +30 cd/m2

(at 9300K + 8 M.P.C.D.)

Gray scale

0/15

(0/255)

2/15

(32/255)

15/15

(255/255)

120%

≥

100

≥

B2 B3

Brightness : default position

Raster ≤ 0.20 cd/m

Raster must not visible at minimum Brightness control.

Brightness : MAX position

2.0 cd/m

≤ Raster ≤ 6.0 cd/m

5-19

5.4 Color

Signal No.13 (VESA1280*1024@85Hz)

5.4.1Color Temperature (Window pattern)

(H:33%,V:33%)

Contrast : 100cd/m

Brightness : Cut off

5.4.2 White Uniformity

(Full white pattern)

Contrast : 100cd/m

Brightness : Cut off

5.4.3 Color Tracking of

Contrast control

(Window pattern)

(H:33%,V:33%)

5.4.4 Color Tracking of

brightness control

(Window pattern)

(H:33%,V:33%)

5.4.5 sRGB color quality

(Full white pattern)

Color-1: 9300K + 8 M.P.C.D. Xref=0.283 ± 0.015 Yref=0.297 ± 0.015 Color-2: 8200K X=0.290 ± 0.015 Y=0.313 ± 0.015 Color-3: 7500K X=0.300 ± 0.015 Y=0.315 ± 0.015 Color-4: sRGB (Luminance: 80 +20/-10 cd/m2) X=0.313 ± 0.015 Y=0.329 ± 0.015 Color-5: 5000K X=0.345 ± 0.015 Y=0.359 ± 0.015

White color temperature (x, y) at B1,B2,B3,B4 is as follows.

A(x ref, y ref)

x ref + 0.015

x <

y <

y ref + 0.015

B2 B3

X = Xref + Y = Yref +

0.015

0.015 Color setting : 9300K Contrast Control: from 20cd/m

Brightness : Cut off

to MAX

X = Xref ± 0.015 Y = Yref ± 0.015 Color setting : 9300K Contrast Control: 20cd/m Brightness : from Man. to Mix.

RED : x=0.640 +0.020/-0.035 Y=0.330 +0.030/-0.020 Green: x=0.300 +0.020/-0.035 Y=0.600 +0.020/-0.020 Blue: x=0.150 +0.015/-0.015 Y=0.060 +0.030/-0.015

White: x(sRGB)=0.3127 ± 0.020 y(sRGB)=0.3290 ± 0.020 |x(sRGB)-y(sRGB)|< 0.020

Brightness:Y=80 +20/-10 cd/m

Gamma: S-g=2.2 ± 0.2

5-20

5.5 Geometric Distortion

5.5.1 Partial Distortion The number of pole point each side All Preset Signals

Top and Bottom side: Less than 3 point

Left and right side: Less than 2point

5.5.2 Inner Distortion All Preset Signals With Crosshatch

≥ 38kHz: x ≤ 0.5 mm

< 38kHz: x ≤ 1.0 mm

5.5.3 Raster Rotation/Tilt

All Preset Signals

| a - b | ≤ 1.0 mm or -0.5 degree ≤ θ ≤ ± 0.5 degree

5.5.4 Pincushion

All Preset Signals

Top : d1 ≤ 1.5 mm Bottom : b1 ≤ 1.5 mm |d1-b1| ≤ 1.5 mm Left side : a1 ≤ 1.5 mm Right side : c1 ≤ 1.5 mm |a1-c1| ≤ 1.5 mm

5.5.5 Barrel

All Preset Signals

Top : d2 ≤ 1.5mm Bottom : b2 ≤ 1.5 mm Left side : a2 ≤ 1.5 mm Right side : c2 ≤ 1.5 mm

Bezel

Pole point

5.5.6 Trapezoid

∆y ≤ 1.5 mm ∆x ≤ 1.5 mm

∆x = | x1 - x2 |

∆y = | y1 - y2 |

5-21

y1’

x1’

Bezel

x2’

y2’

5.5.7. Parallelogram

All Preset Signals

-0.8mm ≤ a ≤ +0.8mm

or -0.2 degree ≤ α ≤ +0.2 degree

5.5.8 Overall Distortion

All Preset Signals Top : d ≤ 1.5mm Bottom : b ≤ 1.5mm Left side : a ≤ 1.5mm Right side : c ≤ 1.5mm

5.5.9 Video Boundary Geometry All Preset Signals

S ≤ 50mm : b-a ≤ 0.5 mm S > 50mm : b-a ≤ 0.01 x S mm

5.6 Linearity

Linearity

* at preset timings

* With Green-Crosshatch (17 lines horizontally by 13 lines vertically ) applied.

* The formula used to calculate linearity is:

Xmax – Xmin Ymax - Ymin

(Xmax + Xmin)/2 (Ymax + Ymin)/2

X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15 X16

Y10

X11

Y12

H: ≤ 15%(31-43k) , ≤ 12%(43-55k) , ≤ 10%(55-) , adjacent: ≤ 6%

V: ≤ 10% , adjacent: ≤ 5%

x 100% x 100%

X1=X2=X3=…=X16

Y1=Y2=Y2=…=Y12

5-22

5.7 Misconvergence

Zone A: X, Y ≤ 0.25 mm within the 236 mm diameter circle

Misconvergence

Zone B: X, Y ≤ 0.35 mm within 315 mm x 236 mm

* With White Crosshatch (17 lines horizontally by 13 lines vertically ) applied.

* Zone A is a circular area with 236mm diameter at the center.

* Zone B is a rectangular area (315mm x 236mm) outside of the Zone A.

* Use worst case horizontal/vertical misconvergence between any two primary colors.

Zone B

Zone A

5.8 Focus

Focus

Signal No.13

Contrast : Max. Brightness: Cut off

Resolution: 1280 x 1024 (85Hz) Character: 7 x 9 pixel ”∃” Color : White

Judgment: “∃” character are readable with clearly at the whole screen.

9 lines

The gap between lines

should be crisp.

7 dots

Use the video card “Matrox G550” and receive Microsoft Excel “Work sheet” (1280*1024(85)).

Make sure that there is no double line for horizontal.

5-23

5.9 Halo

H H H

Halo

Signal No.13 Contrast : Max.

Brightness: Preset

5.10 Raster Regulation

Character:

Color: Crosshatch

Judgment:

Each color (Red, Blue) line do not form halos.

Vertical lines : halos + core are less than 7 grills(R), 7 grills(B)

Horizontal lines : core : halos = 1 : less than 1.5

Horizontal

Core

Vertical

Grills

Raster Size

Regulation

All Preset Signals

(Full White pattern)

Judgment:

1.The total horizontal and vertical size of the picture shall not change more than 1.0mm, when displaying a flat field, and adjusting the brightness from 30 to 124 cd/m

2. The picture size should not vary 1% in the horizontal and vertical direction by Input voltage change in 90-132VAC and 198-264VAC.

Size Change Spec.

−

≤

−

≤

5-24

6. CRT Limits of Screen and Faceplate Blemish

6.1 CRT Face plate defect

6.1.1 Inspection condition

1) In the operating condition, observe the defect on the screen under the following condition:

9300 K (x=0.283, y=0.297) white raster or the element monochrome raster which its brightness is 34 cd/m (10 ft-L) on the screen center surrounding light is about 10 Lux.

2) In the non-operating condition, observe the defect of the screen under light of about 200 Lux, measured at the faceplate.

3) Inspection shall be made more than 45cm away from the screen.

4) Observe the screen on white raster and each monochrome color of red, green and blue.

6.1.2 Division of zone

A screen is divided into following 2 zones.

Zone A: Area inside the rectangle that its size measures H: 300mm, V: 225mm in the center of screen.

Zone B: Area outside the above rectangle.

6.1.3 Limits

1) CRT face defect

a. Distance (Minimum distance)

b. Average diameter

Turn of (a + b) / 2 (a: length, b: width)

c. Limit

Dark spot, Blocked aperture

Average diameter (mm) A B A + B Minimum distance

0.51 ~ 0 0 0 -

0.31 ~ 0.50 0 0 0 -

0.15 ~ 0.30 6 (note 1) 6 (note 1) 10 (note 1) 10mm

Discoloration, Stain, Missing phosphor, etc.

Average diameter (mm) A B A + B Minimum distance

0.51 ~ 0.75 0 1 - 20mm

00.15 ~ 0.50 2 3 - 20mm

Note 1: No missing spot large than specified are allowed in Zone A.

Note 2:The spec applies to each color.

5-25

2) Face plate defect

a. Blisters, opaque spots and elongated closed blisters

Average diameter (*1) Allowable number (pcs) Minimum Separation

(mm)

0.76 0 0 0

0.51 ~ 0.75 0 1 1

0.26 ~ 0.50 2 3 5

0.11 ~ 0.25 - - -

Note (*1) Mean diameter shall be either one of the following values, which is smaller.

(a+b)/2 or a/20+2b (a: length, b: width)

Note (*2) Maximum 5 pcs. In area of Φ 10mm.

b. Scratch

Width (mm) Allowable Length (mm)

0.16 ~ Rejected

0.11 ~ 0.15 3

0.06 ~ 0.10 26

~ 0.05 Unlimited

Zone A Zone B Total

(mm)

(*2)

c. Other glass defect

Flaw, crack and lack cannot be distinguish easily by naked eye.

Iron rust conforms to limited sample.

6.2 AR-film's surface defect

6.2.1 Inspection conditions

1) Put a valve on an inspective stand and Illuminate it from the top with white fluorescent light.

2) Valve surface luminance is more than 1000Lux and less than 1000Lux.

3) Observe from distance of 40cm from surface, disregard flaws which can not be distinguished from this

distance.

5-26

6.2.2 Division of zone

The screen is divided into following 3 zones.

Zone A: Area inside the rectangle that its size measures the followings in the center of screen.

H : 300mm, V : 225mm

Zone B: Area outside zone A and inside the fluorescent surface edge.

Zone C: Area outside the fluorescent surface edge.

Fluorescent surface edge

zone B

zone A

zone C

6.2.3 Limits

a. Scratch

Width (mm) Allowable Length(mm)(Zone A + Zone B)

0.16 ~ Reject

0.11 ~ 0.15 13

0.06 ~ 0.10 26 ~ 0.05 Unlimited

Note 1: Even though width of scratch is more than 0.16mm, regard scratch whose contrast is weak

extremely as stain and apply standard of 6.2.3 a.

Note 2: Do not recognize flaws which injures goods prices though it is not especially stipulated as for

zone C.

b. Opaque flaws ( ex. Stain ) and coating peeling

Do not apply the following standard to zone C.

Classify flaws by contrast and judge it by size every the contrast.

Definition of contrast

High contrast : The foreign substance which shuts off light from fluorescence surface.

Middle contrast : A semitransparent foreign substance and stain.

( ex. coating material which has been changed )

Low contrast : Stain and dust which do not reflect light from fluorescence surface and can be

distinguished by its appearance.

Note : Ignore the light spot with no interference color.

(However, Non of them with its size in excess of 3.75 mm is acceptable, that damages

the product quality.)

5-27

Standards

Average diameter classified by a contrast (Note 1) (mm) Allowable number

High contrast Middle contrast Low contrast Zone A Zone B

~ 0.10 ~ 0.20 ~ 0.50 Ignore Ignore -

0.11 ~ 0.25 0.21 ~ 0.50 0.51 ~ 1.25 2 [4] 4 [5] 20

0.26 ~ 0.50 0.51 ~ 1.00 1.26 ~ 2.50 1 [4] 2 [4] 40

0.51 ~ 0.75 1.01 ~ 1.50 2.51 ~ 3.75 0 [4] 1 [4] 80

Values inside [ ] represent acceptable number in low contrast.

See the table in the next page for total defect number, which is acceptable in low contrast.

Note 1: Convert (a+b)/2 or a/20 + 2b small value into average diameter. (a: length, b: width)

total number of a low contrast flaws Zone A Zone B

Standard classified by zones 6 8

Total ( zone A + zone B ) 10

Note 1: Acceptable interval shall be larger one in the case that defects have different interval.

Note 2: There is no standard regarding zone C. Therefore, no defect is accepted that may deteriorate the

value of products. Defect level by consultation. Discuss is necessary.

Note 3: Tolerance of defect size is approx. 10%.

Allowable Length (mm)

5-28

7. Inspection of PLUG & PLAY Communication and OSM "MONITOR INFORMATION" for Model Name/ Serial Number

7.1 A System Construction

This system should be connected as shown below.

Program Disk

Part No. 599910593

DESKTOP/NOTE

Printer Cable

Signal Generator

7.2 Input Signal

Horizontal sync frequency: Not specified.

Vertical sync frequency: Not specified.

7.3 Programs Required

NPGV233.EXE DP750SB.BAT DP750SB.TXT

7.4 Inspection Procedures

a. Factory Mode: power on + ‘+’ key + ‘−‘ key.

Part No.599910508

EDID JIG

(NPG)

Signal Cable

Monitor

b. Copy the above-mentioned programs in an adequate directory.

c. Set up the MO-DOS mode. (DOS Prompt of Windows95/98 is also acceptable.)

d. Execute the DP750SB.BAT from the command line.

e. "MONITOR INFO." of the OSM is indicated, and a model name and a serial number are confirmed.

When the model name and the serial number are not written in or it differs, h or later is performed.

f. Press the F2 key to start the inspection of DDC2B.

As a result of inspection, when EDID data is not written in or it differs, h or later is performed.

5-29

g. Check the serial number of the set and enter an input of the following code from the keyboard.

08109699 Serial Number (Model Code + 1 Space + Serial No.)

Example: 08109730 2450001YB

h. Press the Enter key. Then, the EDID data, OSM model name, and the serial number begin to be

written in.

i. Display “MONITOR INFO.” of the OSM, and confirm that the model name and serial number have been

correctly written.

j. Press the F2 key to start the inspection of DDC2B.

After the completion of inspection, the contents of EDID are displayed. If an error should occur, the related error message will be displayed in the bottom area of the screen. Refer to Paragraph 7.5 in regard to the meaning of this error message.

5-30

7.5 Error Messages

•

IIC Communication Error

Communication disabled

•

EDID Check Sum Error

Entry of false EDID

•

DDC2 Does Not Find Head Data

DDC2 Communication disabled

7.6 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 : DP750SB.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 34 AC 24 46 01 01 01 01

11 48 4C FF FF 80 31 59 45 59 61 59 71 4F 81 59

81 99 A9 4F 01 01 86 3D 00 C0 51 00 30 40 40 A0

01 03 0C 21 18 78 EB 67 A8 A0 56 47 99 26

13 00 3B EC 10 00 00 1E 00 00 00 FD 00 32 A0 1E

60 15 00 0A 20 20 20 20 20 20 00 00 00 FC 00 44

50 52 4F 37 35 30 53 42 0A 20 20 20 00 00 00 FF

00 32

*1 : address 10h Manufactured month x 4

*2 : address 11h Manufactured year - 1990

*3 : address 71h ~ 7Dh Input serial number (ASCII code)

Add 0Ah after serial number.

Add 20th remaining address.

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

Table 7.6 Data list

59 *3

20 *3

00 62

5-31

TROUBLE SHOOTING

Refer to User’s Manual trouble shooting section before using this chart.

1. NO OPERATION, POWER LED FLASH ....................................................................... 6-2

2. NO OPERATION, POWER LED OFF ........................................................................... 6-3

3. VIDEO NOISE, NO SYNCHRONOUS .......................................................................... 6-4

4. NO VIDEO ..................................................................................................................... 6-5

5. NO RASTER ................................................................................................................. 6-6

6. H. V. SYNC TROUBLE .................................................................................................. 6-8

7. POOR FOCUS .............................................................................................................. 6-9

Page

8. POOR HORIZONTAL LINEARITY .............................................................................. 6-10

6-1

1. NO OPERATION, POWER LED FLASH

POWER LED FLASH

POWER SW

TURN OFF

MULTIMETER TEST

Q314, Q504, D505, D151,

D152, D153, D154, D155

CHECK

U501

U501 PIN6

PULSE O/P

POWER SW

TURN OFF

1. DC P/S O/P VOLTAGE SET AT 12V,CURRENT SET AT 600MA. POSITIVE CONNECT TO C330”+”. NEGATIVE CONNECT TO U501-pin 7.

2. SCOPE SET AT 10V/DIV, 10US/DIV, PROBE CONNECT TO Q319-GATE AND U501-pin 6.

CHECK

U501 PIN 10 VCC

PIN 4 SAWTOOTH

PIN 8 = 5V

FAILURE

U501, Q504

6-2

2. NO OPERATION, POWER LED OFF

POWER SW

TURN OFF

CHECK

F101

CHECK

Q101, Q102, r121

CHECK

U101

U101 PIN6

PULSE O/P

1. DC P/S O/P VOLTAGE SET AT 17V,CURRENT SET AT 200MA. POSITIVE CONNECT TO C111”+”. NEGATIVE CONNECT TO C107”-“.

2. SCOPE SET AT 10V/DIV, 10US/DIV, PROBE

CONNECT TO Q101-GATE AND C107”-“.

CHECK

U101 PIN 7 VCC

PIN 4 SAWTOOTH

PIN 8, 5V

POWER SW

TURN ON

R119, R120, R109, ZD101

FAILURE

6-3

3. VIDEO NOISE, NO SYNCHRONOUS

CHECK D116, D115

R108, R118

CHECK

Q101 G-S FREQUENCY

YES

SYNCRONIZE

WITH H-SYNC

YES

CHECK

Q319 G-S FREQUENCY

CHECK HORIZONTAL

NO NO

FREQUENCY l501 SYNC “+”

TO GND, D116 TO GND

CHECK U501

SYNCRONIZE

WITH H-SYNC

NO NO

CHECK HORIZONTAL

FREQUENCY C359 TO GND

NORMAL OPERATION

6-4

4. NO VIDEO

NO VIDEO

YES

SCREEN CONTROL

CHECK

CLOCKWISE

REFER TO

“NO RASTER”

ON PAGE

YES

U201 PIN 5, 6, 7

SIGNAL LEVEL

CHECK

TROUBLE IN

R/G/B SIGNAL,

SIGNAL CABLE

YES

CHECK

U201 PIN 18, 19, 20

SIGNAL LEVEL

PROBLEM IN U201

CLAMP (PIN 23)

U201 12V VOLTAGE

YES

CHECK

U201 PIN 6, 7, 9

SIGNAL LEVEL

PROBLEM IN U204

12V, 80V VOLTAGE

CATHODE VIDEO

YES

CHECK

LEVEL

PROBLEM IN

R255, R235, R215

YES

PROBLEM IN CRT

6-5

5. NO RASTER

NO RASTER

YES

U501 PIN 14, 15

U701 PIN 35, PIN 2 IS

CHECK

B+

YES

CHECK

H/V SYNC

YES

CHECK

LOW

POWER SUPPLY

CHECK

PROBLEM IN

MCU U701

YES

U501 PIN 6, 8

CHECK

BDRY, HDRY

CHECK ISCL, ISDC

YES

TROUBLE

IN U501

Q504 DRAIN ABOUT

180Vp-p fH=93KHz

YES

CHECK

TROUBLE IN D505, T501, Q504, R525, Q502, Q503

Q314 COLLECT PULSE

YES

CHECK

1000Vp-p

YES

TROUBLE IN

Q314, Q313, D317, T304

6-6

Continue

B301 EMITTER H-BLKD

PULSE 40Vp-p

CHECK

TROUBLE IN

C331, D316, C332

Q305 DRAIN PULSE

YES

CHECK

280Vp-p

CHECK

FBT 2PIN

80V

TROUBLE IN

Q309, R301, D151

YES

TROUBLE IN

U301, Q303, Q305

G1 VOLTAGE ABOUT

G2 VOLTAGE T301

CHECK

-20 ~ -5V

YES

TROUBLE IN

Q307, ZD303, T301, D309

6-7

6. H. V. SYNC TROUBLE

TROUBLE IN

HOR OR VER SYNC

YES

CHECK

CONNECTOR S701

(PIN1, 2), SIGNAL

YES

CHECK

U701 (PIN 39,40)

H/V SYNC

SIGNAL

YES

TROUBLE IN

SIGNAL CABLE

TROUBLE IN

H/V SYNC LINE &

Q701, Q702

CHECK

U701 (PIN 32,33)

H/V SYNC

SIGNAL

YES

CHECK

NO NO

U701 (PIN 5)

VOLTAGE

5V?

YES

TROUBLE IN

5V LINE

U701 (PIN 7, 8)

CHECK

FREQ12MHz

NO YES

TROUBLE IN

X701, U701

CHECK

U502 PIN 14, 15

TROUBLE IN

H. V. SIGNAL LINE

R507, R508, C521, C522

YES

TROUBLE IN

U501

6-8

7. POOR FOCUS

p-p

POOR FOCUS

YES

CHECK

T302 3PIN H-DYNAMIC

P A RBOLA WAVEFORM 500Vp-p

V-DYNAMIC PARABOLA

WAVEFORM 150V

YES

T301 STATIC FOCUS VR AND

DYNAMIC FOCUS VR

ADJUST

1. CHECK STATIC FOCUS AND DYNAMIC FOCUS VR LINE TO CRT SOCKET.

2. CRT SOCKET OR CRT POOR.

T302 H AND V

CHECK

PARABOLA

WAVEFORM

H-PARABOLA

TROUBLE IN

T302, C325, R341, T301

H-PARABOLA

CHECK

U501 32 PIN

V-PARABOLA WAVE

0.47Vp-p

YES

TROUBLE IN

Q312, C343, R356, R330

V-PARABOLA WAVE

CHECK

U501 32 PIN

0.47Vp-p

ADJUST V-FOUCS

OUTPUT 50 ~ 60%.

YES

6-9

8. POOR HORIZONTAL LINEARITY

POOR HORIZONTAL

LINEARITY

TROUBLE

T303, Q310

6-10

CIRCUIT DESCRIPTION

1. Power Circuit ........................................................................................................................ 7-3

1.1 General Description ........................................................................................................... 7-3

1.2 EMI Circuit ......................................................................................................................... 7-3

1.3 AC Rectification and Smoothing Capacitor ........................................................................ 7-3

1.4 Degaussing Circuit ............................................................................................................. 7-3

1.5 Transformer and Energy .................................................................................................... 7-3

1.6 Overcurrent Protection ....................................................................................................... 7-3

1.7 Starter Circuit ..................................................................................................................... 7-4

1.8 Sync Circuit ........................................................................................................................ 7-4

1.9 Feedback Circuit ................................................................................................................ 7-4

Page

1.10 Snubber Circuit ................................................................................................................ 7-4

1.11 Power Management Function .......................................................................................... 7-4

1.12 Harmonic Coil Changeover Circuit .................................................................................. 7-4

2. MCU ..................................................................................................................................... 7-5

2.1 Frequency Specifications ................................................................................................... 7-5

2.2 System Architecture ........................................................................................................... 7-5

2.3 Inputs ................................................................................................................................. 7-5

2.4 Outputs ............................................................................................................................... 7-5

2.5 Pin Assignments ................................................................................................................ 7-6

2.6 CS Table ............................................................................................................................. 7-6

2.7 Model Changeover Table ................................................................................................... 7-6

3. Deflection Circuit .................................................................................................................. 7-7

3.1 Deflection Control IC (IC501) ............................................................................................. 7-7

3.2 Horizontal Deflection Circuit ............................................................................................... 7-8

3.2.1 Horizontal Oscillator Circuit ............................................................................................ 7-8

3.2.2 Step-up Horizontal Deflection Source (+B) ..................................................................... 7-8

7-1

3.2.3 Horizontal Width Control Circuit ...................................................................................... 7-9

3.2.4 Horizontal Drive Circuit ................................................................................................... 7-9

3.2.5 Horizontal Output Circuit and Horizontal Feedback Circuit .......................................... 7-10

3.2.6 Linear Correction Circuit and Character S Correction Circuit ....................................... 7-11

3.2.7 Centering Circuit ........................................................................................................... 7-12

3.3 Vertical Deflection Circuit ................................................................................................. 7-13

3.3.1 Introduction ................................................................................................................... 7-13

3.3.2 Saw-tooth Wave Signals and Waveform Correction Circuit (U501) ............................. 7-14

3.3.3 Vertical Output Amplifier Circuit (U401) ........................................................................ 7-14

4. High Voltage Circuit ........................................................................................................... 7-14

5. Dynamic Focus Circuit ....................................................................................................... 7-14

6. Safety Protection Circuit and X-ray Protection Circuit ....................................................... 7-15

6.1 X-ray Protection Circuit .................................................................................................... 7-15

6.2 Beam Current Protection Circuit ...................................................................................... 7-15

6.3 Primary Leakage Current Protection Circuit .................................................................... 7-15

7. Video Circuit ....................................................................................................................... 7-16

7.1 Video Pre-amplifier .......................................................................................................... 7-16

7.1.1 Video signal mixing ....................................................................................................... 7-16

7.1.2 Video Clamp ................................................................................................................. 7-16

7.1.3 Horizontal Blanking ....................................................................................................... 7-16

7.1.4 Contrast, White Balance, and Brightness Control ........................................................ 7-17

7.2 Video Bias Control ........................................................................................................... 7-17

7.3 Vertical Flyback Blanking Circuit ...................................................................................... 7-18

7.4 Blanking Operations: Signal Mode Changeover,

Power ON/OFF and Unstable Sync signals ..................................................................... 7-18

7.5 ABL Circuit ....................................................................................................................... 7-19

7.6 SB MODE (Super Bright Mode) ....................................................................................... 7-19

7-2

1. Power Circuit

1.1 General Description

This power unit uses a switching power supply. The switching frequency is synchronized within the range of the horizontal frequencies (31kHz to 96kHz).

1.2 EMI Circuit

The EMI circuit comes in a two-stage configuration. The first stage is composed of the choke coil in the common mode and the capacitor X. The second stage is composed of the four capacitors Y. R101 is a discharge resistor for the capacitor X. When the power switch is OFF, this resistor is used to discharge the electric charge accumulated in the capacitor C101.

The EMI circuit is the circuit that is used to prevent the outflow of monitor’s switching noise toward the outside. Its function is effective in minimizing the adverse influence of switching noise to other electronic devices.

1.3 AC Rectifier and Smoothing Capacitor

The AC input power is rectified by the full bridge type rectifier. This rectifier is composed of the diodes D101 to D104. The AC voltage is converted into a DC voltage by the smoothing capacitor C107.

TH101 is an NTC thermistor intended to reduce the inrush current that is generated when the power switch is turned ON.

1.4 Degaussing Circuit

The degaussing circuit is composed of the PTC thermistor TH102, the degaussing coil and the relay RL181. The relay is controlled by the control signal from the MCU.

1.5 Transformer and Energy

1) When a drive pulse is fed from U101 pin 6 (IC KA3842A) to the gate of Q101, a current flows from the positive side to the negative side of C107 through the primary winding of transformer T101 (Pin 6 and Pin

4) and Q101 D-S. By this operation, energy is stored in T101. When the supply of the driving pulse to the gate of Q101 is suspended, Q101 is turned OFF and all the diodes connected to the secondary winding is reversed biased so that the energy stored in T101 is discharged to the secondary side. Q101 is turned ON and OFF by U101 and this operation is then repeated.

2) The MOS FET Q101 is turned ON and OFF by U101 (KA3842A). KA3842A is a PWM (Pulse Width Modulation) IC with an operation start voltage of 16V and an operation stop voltage of 10V. The pin assignment of the KA3842A pulse width modulation IC chip is shown below.

Pin 1: Feedback Pin 5: Ground (GND) Pin 2: Correction Pin 6: Pulse output Pin 3: Current sensor Pin 7: VCC Pin 4: Oscillator Pin 8: VREF (5.1V)

1.6 Overcurrent Protection

If a certain fault occurs and the output power on secondary side becomes too excessive, the peak voltage at U101 Pin 3 raised. When this voltage reaches 1V, U101 operates so that the ON period of Q101 is shortened. As a result, the output voltage on secondary side and the voltage in the auxiliary winding (Pin 1 and Pin 2) on T101’s primary side is lowered. When the voltage in the auxiliary winding becomes less than 10V, the oscillation of the U101 is stopped. However, a charging current flows into C111 through R102, R103, Q102, and D105. When the voltage at U101 Pin 7 reaches 16V, U101 begins to oscillate again. As a result, U101 repeats the intermittent oscillation (repetition of oscillation and suspension).

7-3

1.7 Starter Circuit

When the power switch is turned ON, Q102 is turned ON and a charging current flows into C111 through R102, R103, Q102, and D105. When the voltage at U101 Pin 7 reaches 16V, the U101 begins to oscillate. When the U101 begins to oscillate, the currents consumed in U101 and Q101 increased. Therefore, current is fed from the auxiliary winding (Pin 1 and Pin 2) on primary side of T101.

1.8 Sync Circuit

When the pulses synchronized with the horizontal frequencies (31kHz to 96kHz), are supplied from the centering choke coil L501 to the sync circuit that is composed of D115, D116, R125, R108, R118, and C119, the oscillation frequency of the U101 is synchronized with the input horizontal frequency.

1.9 Feedback Circuit

The output of the auxiliary winding on the primary side of T101 Pin 1 is converted into a DC voltage by D110 and C112. This DC voltage is divided by R114 and R115, and is then compared with the reference voltage at U101 Pin 8. The error from the reference voltage is input in U101 Pin 2 and the output voltage is controlled until it becomes identical with the reference voltage.

1.10 Snubber Circuit

The snubber circuit consisting of D116, C109, and R122 is intended to reduce the surge voltage that is generated when Q101 is turned OFF.

1.11 Power Management Function

This is the power saving mode: The power of the 14V line is turned OFF by the MPU (U701), in order to stop

the operation of the deflection circuit and the video circuit. At that time, LED101 changes its color from green to orange.

1) When the power switch is kept in the ON position, the MPU detects both the horizontal and vertical sync

signals. If the either the vertical and horizontal sync signals from the PC main unit is no present from the signal cable, the voltage level at the MPU Pin 29 (PS1) turns HI to cause Q152 to turn ON and Q151 is turned OFF. This causes the power of the 14V line to be turn OFF and this causes Q503 to turn OFF. In addition, the -12V power supply fed by U601 from the 14V line is also turns OFF. As a result, operation of the deflection and the video circuits is suspended.

At that time, the potential at MPU Pin 28 (PS2) turns LOW with a 50% duty, thus making Q155 to turn ON/OFF. As a result, the heater voltage is lowered and the power consumption is reduced.

2) When the user touches the keyboard of the PC in the OFF mode, the MPU detects the horizontal and

vertical sync signals to reset the monitor.

1.12 Harmonic Coil Changeover Circuit

In order to suppress harmonics generated from equipment, this coil is connected in series with the live side of the power line. To comply with the world wide specifications for power supplies, the power voltage is divided by the resistors of R131, R132, and R133 and the resulting voltage is used to cause Q131 and Q132 to turn ON/OFF with the threshold value of ZD131 to drive the coil of RL131. In this fashion, changeover is conducted to choose a series connection when the source voltage is high or a parallel connection when the source voltage is low. The source voltage change over is about 170V AC.

7-4

2. MCU

2.1 Frequency Specifications

Horizontal Frequency : 29.5kHz to 96kHz

Vertical Frequency : 43Hz to 160Hz

Support of composite sync signals

2.2 System Architecture

1) MCU - Myson MTV212NM32, 32k-byte ROM size.

PROM - 24C08 Series, 8k-bits (initialize enabled by microcomputer).

2) E

3) OSD - Myson MTV030N16.

2.3 Inputs

1) Sync input - Two pins for reversal inputs of horizontal sync and vertical sync.

2) Key input - Two pins for A/D key input (EXIT, <, >, -, +, SELECT, RESET).

3) One pin for signaling cable connection sensing (for factory).

4) Reset input - High pulses for MCU reset.

5) Crystal oscillator input - Two pins for using a 12MHz crystal oscillator.

6) Detection of oscillation IC operation - One pin.

7) Detection of protector operation - Three pins for beam current, high voltage, and X rays protector detection.

8) External 5V detection input - One pin.

2.4 Outputs

1) Degaussing - Made to be active for a predetermined time period during degaussing. The MCU executes

degaussing even when the power supply is turned ON.

2) CS output - Four pins for CS control (CS4, CS2, CS1, CS0)

CS3 not used.

3) MUTE - When the sync signal is unstable, this output becomes active to protect the relevant circuits. The two

circuits of MUTE1 and MUTE2 are available.

4) Convergence - Two PWM outputs for horizontal and vertical (19” only).

5) POWER save - Two circuit control pins for power saving.

6) Sync signal output - Two pins for horizontal sync and vertical sync.

7) Rotation - One PWM output pin for rotation circuit control.

8) DDC communication - Communication port of DDC-DDC2B or DDC/CI. Two circuits of HSCL and HSDA.

9) ISDA/ISCL - Two pins for EEPROM, OSD IC, OSC IC, and PRE-AMP IC.

7-5

2.5 Pin Assignments

Pin # Function Circuit

symbols

1 UNLOCK supervisory input

DEFL-IN

of OSC IC

2 MUTE output 3 Protector input 4 RESET input 5 Power input 6 GND

7 Crystal oscillator input

8 Crystal oscillator input

9 I

10 I

C communication port

11 CS control output 12 Not used 13 Protector input 14 Protector input 15 Model changeover input 16 CS control output 17 CS control output 18 Not used 19 CS control output 20 External 5V detection input

MUTE1

X/YRAY-IN

RESET

VDD

VSS

ISDA

ISCL

CS0

AD-DRIFT

MEAN-IN

HVOLT-IN

OPTION1

CS1

CS2

CS3

CS4

PC97

Pin # Function Circuit

symbols

21 Signaling cable detection input

22 Key input 23 Key input 24 DDC communication port 25 DDC communication port 26 Vertical convergence control

#5(PC)

AD1

AD0

HSDA

HSCL

CG-V

output

27 Horizontal convergence control

CG-H

output

28 POWER SAVE control output 29 POWER SAVE control output 30 Degaussing control output 31 Not used 32 Vertical sync output 33 Horizontal sync output 34 Not used 35 MUTE output 36 Rotation control output 37 Model changeover input 38 Model changeover input 39 Horizontal sync input 40 Vertical sync input

PS2

PS1

DEG

V-OUT

H-OUT

MUTE

ROT

H-IN

V-IN

2.6 CS Table

RDF193H/FE991SB/DPlus93SB RDF173H/FE791SB/Dpro750SB Horizontal

frequencies

<34K L L L H L L L L H L <36.5K L L H H H H L H H L <40K L L H H H L L H H H <44K L H L H L L H L H L <49K H H L H L L H L H H <52K H H L H H L H L H H <58K H H L H H H H L H H <62.5K L H H H L L H H H L <67K L H H H L H H H H L <74K H H H H L H H H H L <83K L H H H H L H H H H 83K<98K H H H H H H H H H H 98K< H H H H H H H H H H

CS0

Pin 11

CS1

Pin 16

CS2

Pin 17

CS3

Pin 18

CS4

Pin 19

CS0

Pin 11

CS1

Pin 16

CS2

Pin 17

CS3

Pin 18

2.7 Model Changeover Table

Model Pin 15 Pin 37 Pin 38 RDF193H/FE991SB/DPlus93SB H L H

RDF173H/FE791SB/Dpro750SB H H L

CS4

Pin 19

7-6

3. Deflection Circuit

3.1 Deflection Control IC (IC501)

IC501 is in charge of the horizontal width control and the generation of vertical pre-amplifier output. This IC follows the frequency and generates a proper output of horizontal drive pulses. For the screen size control, this IC also generates the B+ output drive pulses.

In addition, using the control signals from the microcomputer IC701, this IC is used to control the trapezoidal distortion, the pin balance, and the horizontal position. There are also outputs of horizontal and vertical parabolic waveforms for focusing.

The pre-amplifier functions are available for the vertical screen width, the position, and the vertical linearity.

(Fig. 3.1)Deflection Control IC (IC501)

To H_DRIVE Circuit

B_SENCE

To B_DRIVE Circuit

AFC feedback (From H_OUT Circuit)

7-7

3.2 Horizontal Deflection Circuit

3.2.1 Horizontal Oscillator Circuit

The outputs of the horizontal oscillator drive pulses (Pin 8 H_DRV) and the Power B drive pulses (Pin 6 B_DRIV) are generated from the U501 (TDA4856).

The horizontal drive pulses of about 10Vp-p are output from Pin 8 (H_DRV) in the open collector mode. The duty cycle is about 50% and its frequency is dependent on the input horizontal sync frequency. Even though the input frequency varies, the duty cycle is kept almost constant (about 50%).

The AFC feedback signal from the horizontal deflection output circuit is input to Pin 5 (B_IN) and an error amplifier of R515, R516, C510, and C511 is established between Pin 5 (B_IN) and Pin 3 (B_OUT).

Based on the error-guaranteed voltage at Pin 3 (B_OUT), a voltage B drive pulse output is generated in the open collector mode from Pin 6 (B_DRIV) with the use of the IC’s internal comparator and the flip-flop circuit. These pulses are output in synchronization with the horizontal drive pulses.

3.2.2 Step-up Horizontal Deflection source (+B)

This is a step-up type chopper circuit consisting of Q504, T601, D505, etc.

Based on the input power supply of 26V, an output of about 30 to 40V (horizontal size MIN to MAX) is generated when fh = 31kHz and another output of about 110 to 130V is generated when fh = 93kHz.

To produce this circuit input, the drive pulse output from U501 (TDA4856) Pin 6 (B_DRIV) and the 26V power is stepped up to obtain a B power source according to this pulse duty.

The deflection source B is obtained from the input pulse duty when the power input is assumed to be Vi, using the formula given below.

D = 1 - (Vi/B)

B = Vi/(1 - D)

For horizontal size and distortion adjustment, a signal is output from U501 Pin 11 (EW_DRV) to Pin 5 (B_IN) which is superposed on the drive pulses output from Pin 6 (B_DRIV).

[B_SENS operation waveform]

When the current of R525 reaches about 3.5A peak (B_SENS voltage at U501 pin 4 = 0.27Ω * 3.5A =

0.945V; TYP 1.0V for IC specifications), the B_DRV signal at U501 Pin 6 turns OFF and the FET Q504 is

turned OFF. At that time, the drain voltage of Q504 is raised by the counter electromotive force and the resultant voltage is used as a B power supply for the deflection circuit. The duration of the counter electromotive force pulse for the B power supply is dependent on the load that is required by the deflection circuit. When the required amount of current is flows through D505, the drain voltage of Q504 settles down to the source voltage (approx. 26V) through the inductance of T501.

26V

H_OUT Circuit

B_DRIVE (From U501 6pin)

(Fig. 3.2.2) Step-up Horizontal Deflection Source (+B)

B_SENS (From U501 4pin)

7-8

3.2.3 Horizontal Width Control Circuit

Q314 is controlled by the horizontal drive pulses from IC501. While Q314 is turned ON, the energy is stored in the horizontal deflection yoke. When it is turned OFF, the stored energy flows into C331 and C332. This operation is repeated to maintain the horizontal deflection. The voltage of collector pulses at Q314 is divided by C331 and C332, and the resultant pulses are used for the switching synchronization of the high voltage control IC301 and the generation of horizontal blanking pulses. The horizontal width is controlled by changing the B+ drive pulse duty of the output at IC501 Pin 6. When the duty is changes, the rectifying voltage of D317 and the “S” correction capacitor changes. Then, the horizontal width also changes. The vertical parabolic waveform is generated within IC501 and the resultant output is generated at IC501 pin 5. This output is then applied to the B+ drive pulse generator circuit through R512. By virtue of this parabolic output, the correction control can be conducted for the pincushion, barrel trapezoidal and upper/lower distortions.

3.2.4 Horizontal Drive Circuit

In the horizontal drive circuit, the horizontal oscillation drive pulses output from IC501 (TDA4856) pin 8 H_DRV of the oscillator are used to convert the power supply of 26V to the base drive current fed to the horizontal transistor through the drive transformer T304 and the switching FET Q313.

26V

H_DRIVE (From U501 8pin)

Horizontal transistor Q314 Base current Ib

(Fig. 3.2.4) Horizontal Drive Circuit

7-9

3.2.5 Horizontal Output Circuit and Horizontal Feedback Circuit

The horizontal output circuit is composed of the horizontal transistor Q314, the damper diode D317, the resonance capacitor C332 and the deflection yoke (H_DY).

When the base current fed from the drive circuit is turned ON, a deflection current flows into the horizontal transistor Q314 for the specified time period. By virtue of the base current drain feature (Ib2), a collector pulse of about 1000V is generated at the collector of Q314 by the resonance circuit consisting of the resonance capacitor C332 and H_DY, the linear coil and the “S” capacitor. The pulse width of this resonance pulse is mainly dependent on the inductance value of the deflection yoke H_DY and the capacitance value of the resonance capacitor.

Using the collector pulse of this output circuit, the presence of an AFC pulse is detected according to the capacitance ratio of the resonance capacitor C332 vs. C331 in the AFC feedback circuit. The AFC feedback circuit is composed of D315, D316, C330, C331, R349, and R350. The detected AFC pulse is DC-rectified by D315 and C330, and fed back to the +B voltage input circuit (U501: Pin 5 of B_IN) of the oscillator circuit.

(Fig. 3.2.5) Horizontal Output Circuit and Horizontal Feedback Circuit

7-10

3.2.6 Linear Correction Circuit and “S” Correction capacitor Circuit

The horizontal linearity correction circuit uses a variable linear coil (T303).

The variable linear coil T303 is used to control the current with the aid of Q310, R339, C322, and C323 which flows on the primary side of the coil.

The control signal input is entered from the drive pulse circuit of the horizontal deflection source (+B power supply) circuit. It is dependent on the variation (input frequency and horizontal size) in the +B voltage of the horizontal deflection circuit, and is used to control the horizontal linearity.

The “S” capacitor C517 correction circuit is enabled when all the signals are received. For the other “S” capacitors C334, C336, C338 and C340 are turned ON and OFF at each frequency by the FETs Q315, Q317, Q319 and Q321, respectively, in order to control the increase or decrease in the capacitance of the “S” capacitors according to the input frequency.

The ON/OFF control of the “S” capacitors is carried out according to the CS signals (CS0, CS1, CS2 and CS4) sent from the MPU.

From H_DY

+B voltage

From the horizontal deflection source (+B) circuit

+B drive pulse input of the horizontal deflection source (+B) circuit

Horizontal linearity correction circuit (variable linear coil)

“S” correction circuit “S”

changeover

circuit

(Fig. 3.2.6) Linear Correction Circuit and “S” Correction Circuit

7-11

3.2.7 Centering Circuit

The horizontal raster centering circuit is inserted between the horizontal deflection source circuit and the horizontal deflection output circuit (H_DY). This circuit is used to assure a current flow of the DC current bias component in order to shift the deflection current waveform toward the horizontal deflection circuit.

The inflow current is controlled through the adjustment of VR501.

The raster centering circuit uses about 5VDC generated by the rectifier circuit of D507 and C518, using the power from the secondary winding of T501 in the horizontal deflection source circuit. As a result, a raster centering correction current is fed from the current circuit that is composed of Q505, R529, R530, VR501, C519 and L501.

The correction current value is determined by the synthetic impedance (approx. 10Ω) of R530 and L501.

To H_DY of the horizontal deflection circuit

Horizontal deflection raster centering circuit

Horizontal deflection source +B voltage

(Fig. 3.2.7) Centering Circuit

7-12

3.3 Vertical Deflection Circuit

3.3.1 Introduction

The vertical deflection circuit gains an input of vertical saw-tooth wave signals generated from the oscillator IC501 Pin 13 Vout1 and Pin 12 Vout2. The resultant output signal is converted into a current that drives the DY (V) through the use of the U401 (TDA8172) driven by +14V and -12V of the power supply.

The vertical deflection circuit is composed of the following blocks:

1) Saw-tooth wave generator and waveform correction circuit (U501)

2) Vertical output circuit (U401)

Circuit diagram

Vout2(From U501 12pin)

Vout1(From U501 13pin)

V_DY

Equivalent circuit

Vi1(Vout2)

Vi2(Vout1)

R405

6.8kΩ

R409

6.8kΩ

Vref1

Vref2

R410

3.0kΩ

(Fig. 3.3.1) Introduction

7-13

R406

3.0kΩ

V_DY

r(DY)

Vout

R407

1.2Ω 1W

3.3.2 Saw-tooth Wave Signal and Waveform Correction Circuit (U501)

1) Vertical oscillator

When a vertical sync signal input is entered into U501 Pin 14, the saw-tooth wave signals are output from U501 Pin 12 and 13. The frequencies of these waveforms are identical with those of the vertical input sync signal. If there is no vertical sync signal input, the frequency of the output waveform is equal to the free-run frequency. This free-run frequency is maintained at approximately 75Hz.

2) Vertical size control circuit

The saw-tooth wave signal output generated from U501 Pin 12 and Pin 13 is input to U401 of the vertical output amplifier. The vertical screen size is controlled by changing the amplitude of this saw-tooth wave signal.

3) Vertical raster position

The saw-tooth wave signal output generated from U501 Pin 12 and 13 is input to U401 of the vertical output amplifier. At the same time, the DC component of the waveform applied to U401 Pin 7 changes to control the vertical raster position.

3.3.3 Vertical Output Amplifier Circuit (U401)

The saw-tooth wave signal output generated from U302 Pin 12 is input to U401 Pin 1 of the vertical output amplifier. The amplified current waveform is output from U401 Pin 5. With this current, the vertical deflection coil is operated.

4. High Voltage Circuit

The high voltage circuit uses the PWM control system to regulate the ON/OFF time of the high voltage generator FET. U301 is the IC that performs the PWM control. The pulse voltage generated in Q305 is stepped up at T301 (F.B.T.) to obtain a 26kV potential. The feedback voltage from T301 Pin 11 is divided by a combination of R316 and VR301, and the obtained voltage is then fed back to IC701 Pin 1. A constant high voltage is maintained by controlling the pulse width of the PWM output at Pin 10. For the adjustment of a high voltage the VR301 is adjusted, which is used as a shunt resistor of the feedback voltage. The PWM output is synchronized with the horizontal sync frequency. The trigger pulse signal for synchronization is output from the shunt voltage of the collector pulse obtained from the horizontal deflection output circuit Q314. This output is applied to IC301 Pin 5.

5. Dynamic Focus Circuit

The primary winding of T302 is driven by the parabolic voltage generated by the horizontal source +B circuit. As a result, a step-up horizontal parabolic waveform is generated in the secondary winding of T302. On the other hand, the vertical parabolic waveform output is generated from IC501 Pin 32 and it is then amplified at Q312. The vertical parabolic waveform signal is superposed on the horizontal parabolic waveform signal available on the secondary side of T302. The power supply for Q312 is obtained by using the output voltage at T301 Pin 6 Which is rectified by D307 and C311.

7-14

6. Safety Protection Circuit and X-ray Protection Circuit

6.1 X-ray Protection Circuit

This is a protection circuit intended to prevent the radiation of X-ray from exceeding the dangerous level, possibly caused by an unusual high voltage rise.

Please do not modify either the high voltage circuit or the safety protection circuit.

The high voltage upper limit value and the beam current value are defined by the upper limit curves of X-ray radiation in the CRT.

The X-ray protection circuit operates at 27.5kV. The detection and protection circuit comes in the two circuits.

In Circuit 1, the rise of the pulse voltage at T301 Pin 7 is controlled by comparing the reference voltage with the voltage rectified at D308 and C312 in the U302. In an error mode, a high level output from U302 is applied to U701 Pin 3 (X/XRAY-IN). When an error is sensed, U701 suspends the high voltage deflection for protection in the completely stopped mode.

In Circuit 2, the rise of the pulse voltage T301 Pin 7 is controlled by inputing the voltage which is rectified at D308 and C312, at U501 Pin 2 (XRAY). When an error is sensed, U501 suspends the oscillation. At the same time, the HUNLOCK is turned HIGH to send the information of abnormal oscillation to the microcomputer. Q301 is simultaneously turned ON to stop the driving U301 for protection.

Operation of this circuit is maintained until the AC power supply is turned OFF.

6.2 Beam Current protection Circuit

The protection circuit operates when the current flowing in the high voltage generator winding of the FBT exceeds the specified level. The detection of the beam current is conducted in terms of the voltage drop measured by the circuit elements of VR302, R321, and R320, connected in between T301 Pin 8 and 12V. When the inrush current flowing in Pin 8 exceeds the specified level, the voltage is lowered at T301 Pin 8. This voltage input to U302 via R236 and is compared with the reference voltage. In any error mode, the output is turned LOW and this output is input to U701 Pin 13 (MEAN-IN). At this stage, high voltage deflection is suspended in the completely stopped mode.

6.3 Primary Leakage Current Protection Circuit

The protection circuit operates when the current flowing into the primary winding of the FBT exceeds the specified level. The detection of the primary leakage current is conducted in terms of the voltage drop measured at R301 that is connected in between the 83V power supply and T301 Pin 2. When the inrush current flowing into Pin 2 exceeds the specified level, the voltage of R301 is lowered at T301 Pin 2. Q309 is then turned ON and the potential at U501 Pin 2 is turned HIGH via R318. When an error is sensed, U501 suspends oscillation. At the same time, the HUNLOCK is turned HIGH to send the information of abnormal oscillation to the microcomputer. Q301 is simultaneously turned ON to stop driving U301 for protection.

7-15

7. Video Circuit

7.1 Video Pre-amplifier

The U201 is a video pre-amplifier. It is used to control the following functions.

U701

MPU

D-SUB

SDA SCL

U201

Pre-Amp

CLAMP

DAC

B-Bias

DAC

G-Bias

DAC

R-Bias

ABL

BIAS circuit

2 3

(Fig. 7.1) Video Pre-amplifier

CLAMP

H-BLK

U501

OSC IC

U204

OUTPUT-

Amp

U202

OSD

H-BLK

ABL

7.1.1 Video Signal Mixing

In U201, the video signal is mixed with the OSD signal (3, 2, 1 for B, G, R respectively). Then, the resultant signal is mixed with the horizontal blanking waveform signal. Outputs for B, G, R are generated from Pins 18, 19, and 20, respectively.

7.1.2 Video Clamp

The clamp waveform signal with a polarity is output from the oscillator IC (U501) and is input to U201 Pin 23.

7.1.3 Horizontal Blanking

The collector pulses of Q314 are divided by the combination of C331 and C332. The obtained pulses are used as the horizontal blanking pulses and is input to U201 pin 24 with a positive polarity. The potential at Pin 24 is HIGH during the horizontal flyback period and the video output voltage of U201 is dropped to perform the blanking operation.

7-16

Mitsubishi DP750SB Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

WARNING

PRODUCT SAFETY CAUTION

CONTENTS

User's Manual

1. B Version

Serial Number Information

DISASSEMBLY

Revolving Stand ASSY

Cabinet Back

CRT BOARD

MAIN BOARD

ADJUSTMENT PROCEDURES

TABLE OF CONTENTS

1. Adjustment & Inspection Tools

2. Timing Table (Factory Mode –18 Modes)

3. Normal Condition Definition

4. Hot Key Operation

5. B+ Check

6. X-RAY Test

7. H. V. B+ Confirmation

8. H-Raster Center Adjustment

9. Preset Adjustment

10. G2 Voltage Adjustment

11. White Balance adjustment

12. Focus Adjustment

13. Purity Adjustment

14. Convergence Adjustment

15. Power Saving Function Inspection

16. Distortion Adjustment

17. Setting Before Shipment

18. Adjustment Magnetic Field

19. TIMING SHEET

INSPECTION

TABLE OF CONTENTS

1.Scope

1.1 Introduction

1.2 General Description

1.3 Regulations

1.4 Regulation Information & Marking Location

2. CRT Specifications

3. Electric Specifications

3.1 Deflections

3.2 Signal Input

3.3 Video Performance

3.4 Power Supply

3.5 Power Saving

3.6 Degaussing

4. Functions

4.1 Display Part

5. Display Quality

5.1 Basic Test Conditions

5.2 Picture Size and Position

5.3 Luminance (Brightness)

5.4 Color

5.5 Geometric Distortion

5.6 Linearity

5.7 Misconvergence

5.8 Focus

5.9 Halo

5.10 Raster Regulation

6. CRT Limits of Screen and Faceplate Blemish

6.1 CRT Face plate defect

6.2 AR-film's surface defect

7. Inspection of PLUG & PLAY Communication and OSM "MONITOR INFORMATION" for Model Name/ Serial Number

7.1 A System Construction

7.2 Input Signal

7.3 Programs Required

7.4 Inspection Procedures

7.5 Error Messages

7.6 EDID Data File

TROUBLE SHOOTING

TABLE OF CONTENTS

1. NO OPERATION, POWER LED FLASH

2. NO OPERATION, POWER LED OFF

3. VIDEO NOISE, NO SYNCHRONOUS

4. NO VIDEO