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Mitsubishi DPLUS 74SB -BKA Service Manual
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Mitsubishi DPLUS 74SB -BKA Service Manual

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PART NO. 599910587

SERVICE MANUAL

Diamond Plus 74SB
COLOR MONITOR
MODELS DPLUS 74SB -BK(A)/(B)
NEC-MITSUBISHI ELECTRIC VISUAL SYSTEMS CORPORATION
MAY 2002
200205
08109736 08109696

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Summary of Contents for Mitsubishi DPLUS 74SB -BKA

  • Page 1: Service Manual

    PART NO. 599910587 SERVICE MANUAL Diamond Plus 74SB COLOR MONITOR MODELS DPLUS 74SB -BK(A)/(B) NEC-MITSUBISHI ELECTRIC VISUAL SYSTEMS CORPORATION MAY 2002 200205 08109736 08109696...

  • Page 2: Warning

    WARNING The SERVICE PERSONNEL should have the appropriate technical training, knowledge and experience necessary to: • Be familiar with specialized test equipment, and • Be careful to follow all safety procedures 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.
  • Page 3 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.

  • Page 4: Table Of Contents

    CONTENTS Page No. USER'S MANUAL ....................1-1 SERIAL NUMBER INFORMATION ............... 2-1 DISASSEMBLY ...................... 3-1 ADJUSTMENT PROCEDURES ................4-1 INSPECTION ......................5-1 TROUBLE SHOOTING ..................6-1 CIRCUIT DESCRIPTION ..................7-1 REPLACEMENT PARTS LIST ................8-1 BLOCK DIAGRAMS ....................9-1 SCHEMATIC DIAGRAMS ..................10-1...
  • Page 5 User's Manual 1. A Version USER’S MANUAL 17 " Diamond Plus 74 16" Viewable Image Size 16" Viewable Image Size www.mitsubishidisplay.com...
  • Page 6 Index Warning ....................1 Contents ....................2 Quick Start ................... 3 Controls ....................5 Recommended Use ................8 Specifications ..................10 Features ....................12 Troubleshooting .................14 References ..................15 Limited Warranty ................16 TCO’95 ....................17 Avertissement ..................19 Contenu ....................20 Mise en marche rapide ..............
  • Page 7 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. REFRAIN FROM OPENING THE CABINET AS THERE ARE HIGH VOLTAGE COMPONENTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

  • Page 8: User's Manual

    Contents Your new Diamond Plus 74 monitor box* should contain the following: • Diamond Plus 74 Monitor with tilt/swivel base • Power Cord • Captive Signal Cable • User’s Manual Captive Signal Cable U S E R ’ S M A N U A L 17 "...

  • Page 9: Quick Start

    Macintosh cable adapter on the computer (Figure B.1). Tighten all screws. NOTE: To obtain the Diamond Plus 74 Macintosh cable adapter, call NEC-Mitsubishi Electronics Display of America, Inc. at (800) 632-4662. 4. For download information on the Windows 95/98/Me/2000/XP INF file ®...
  • Page 10 Quick Start Figure C.1 Power Button Figure D.1...

  • Page 11: Controls

    Controls ™ (On-Screen Manager) control buttons on the front of the monitor function as follows: Main Menu Sub-Menu Exits the OSM menu. Exits to the OSM controls EXIT main menu. CONTROL Moves the highlighted Moves the highlighted area area left/right to select left/right to select one of the one of the sub-menus.
  • Page 12 Controls Color Control/AccuColor Control System ® Color presets selects the desired color setting. The bar is replaced by the color setting choice. Each color 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.
  • Page 13 Controls 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.

  • Page 14: Recommended Use

    Recommended Use Safety Precautions and Maintenance FOR OPTIMUM PERFORMANCE, PLEASE NOTE THE FOLLOWING WHEN SETTING UP AND USING THE DIAMOND PLUS COLOR MONITOR: • DO NOT OPEN THE MONITOR. There are no user serviceable parts inside and opening or removing covers may expose you to dangerous shock hazards or other risks. Refer all servicing to qualified service personnel.
  • Page 15 • Do not use primary color blue on a dark background, as it is difficult to see and may produce eye fatigue due to insufficient contrast For more detailed information on setting up a healthy work environment, call NEC - Mitsubishi Electronics Display of America at (888) NEC-MITS, FastFacts ™ information at (800) 366-0476 and request document #900108 or write the American National Standard for Human Factors Engineering of Visual Display Terminal Workstations –...

  • Page 16: Specifications

    832 x 624 @ 50 to 106 Hz 1024 x 768 @ 50 to 87 Hz ....... NEC-Mitsubishi Electronics Display cites 1152 x 864 @ 50 to 77 Hz recommended resolution at 85 Hz for 1280 x 1024 @ 50 to 66 Hz optimal display performance.

  • Page 17: Features

    The state-of-the-art Mitsubishi PX-DBF electron gun and tight 0.25mm grille pitch delivers precise focus for crisp, clear text and images.
  • Page 18 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. Copyright 2002 by NEC-Mitsubishi Electronics Display of America, Inc. 1-14...

  • Page 19: Troubleshooting

    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 •...

  • Page 20: References

    References • BBS (978) 742-8706 NEC-Mitsubishi Electronics Display of America Remote Bulletin Board System is an electronic service accessible with your system and a modem. Communica- tion parameters are: 300/1200/2400/9600/14.4k/28.8k/33.6k bps, no parity, 8-data bits, 1 stop bit • Customer Service/...

  • Page 21: Limited Warranty

    NMD-A. For the name of your nearest authorized NEC-Mitsubishi Electronics Display of America service facility, contact NEC-Mitsubishi Electronics Display of America at 1-800-632-4662. 1-17...

  • Page 22: Why Do We Have Environmentally Labelled Computers

    TCO’95 Diamond Plus 74 Black Model Congratulations! You have just purchased a TCO’95 approved and labeled product! Your choice has provided you with a product devel- oped 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.
  • Page 23 TCO’95 toxins, PCBs, which are suspected to give rise to similar harm, including reproductive damage in fisheating birds and mammals, due to the bio-accumulative* processes. Flame retardants have been found in human blood and researchers fear that disturbances in foetus development may occur.
  • Page 24 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 1-20...

  • Page 25: Declaration Of Conformity

    NEC-Mitsubishi Electronics Display of America. To allow for design and specification improvements, the information in this document is subject to change at any time without notice.
  • Page 26 2. B Version USER’S MANUAL www.nec-mitsubishi.com 1-22...

  • Page 27: Declaration Of The Manufacturer

    686-1, Nishioi Oi-Machi Ashigarakami-gun Kanagawa 258-8533, Japan Product NERGY As an E Partner, NEC-Mitsubishi Electronics Display of America, Inc. has determined that this NERGY product meets the E guidelines for energy efficiency. The E emblem does not represent NERGY NERGY EPA endorsement of any product or service.
  • Page 28 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.
  • Page 29 Contents Your new Diamond Plus 74 monitor box* should contain the following: • Diamond Plus 74 Monitor with tilt/swivel base • 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.
  • Page 30 Quick Start To attach the Diamond Plus 74 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.
  • Page 31 Quick Start – continued Power Outlet Power Cord Figure C.1 Power Button Figure D.1 6 User’s Manual 1-27...

  • Page 32: Size And Position Controls

    Controls OSM (On-Screen Manager) control buttons on the front of the monitor function as follows: s t i s t i g i l g i l f e l r / t f e l r / t . s l –...

  • Page 33: Geometry Controls

    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.
  • Page 34 Controls – continued 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.

  • Page 35: Safety Precautions And Maintenance

    Recommended Use Safety Precautions and Maintenance FOR OPTIMUM PERFORMANCE, PLEASE NOTE THE FOLLOWING WHEN SETTING UP AND USING THE DIAMOND PLUS 74 COLOUR MONITOR: • DO NOT OPEN THE MONITOR. There are no user serviceable parts inside and opening or removing covers may expose you to dangerous shock hazards or other risks.
  • Page 36 Recommended Use – continued 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.
  • Page 37 Specifications : l a ° 0 e l f e l l c t i e l l - i t l - i t c i t t n i i t i i t a c i t i t i i t a i t i...
  • Page 38 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.
  • Page 39 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 •...
  • Page 40 TCO’99 Diamond Plus 74 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.
  • Page 41 TCO’99 – continued TCO’99 demand requires that plastic components weighing more than 25 grams must not contain flame retar- dants with organically bound chlorine and bromine. Flame retardants are allowed in the printed circuit boards since no substitutes are available. Lead** Lead can be found in picture tubes, display screens, solders and capacitors.

  • Page 42: Serial Number Information

    January to September 1 to 9 October Serial number(5 digits) November December CRT Manufacture Serial Number MITSUBISHI CRT 00001 to 49999 (Made in Mexico) MITSUBISHI CRT 50001 to 99999 (Made in Japan) Factory Code : NPG China Factory :“Y” Destination Code : : “A”...

  • Page 43: Disassembly

    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. •...
  • Page 44 CRT BOARD 1. Five terminals are removed, and six solder is removed. terminals solder 2. Disconnect the connectors “S201”, “S202”, “S203” and “GND”. 3. Unsolder the wires “White wire”, “Red wire” and “Gray wire”. S202 S201 S203 Gray wire White wire Red wire...
  • Page 45 MAIN BOARD 1. Disconnect the connectors “S102”, “S701” and “CRT PWB (GND)”. 2. Remove the screw (PL-CPTS*3*8*15BF). Screw S701 S102 CRT PWB (GND) 3. Remove the two screws (PL-CPTS*3*8*15BF) and screw (PL-CPIMS*4*10*15BF). Screw Screw (PL-CPIMS*4*10*15BF) (PL-CPTS*3*8*15BF)
  • Page 46 4. Cut the three Ties and disconnect the connectors “TPC” and “S301”. 5. Remove 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. Ties S301 Screw 7.
  • Page 47 8. Remove the eight screws (PL-CPTS*3*8*15BF) and remove the Main Board from Chassis Base. screw (PL-CPTS*3*8*15BF)

  • Page 48: Adjustment Procedures

    ADJUSTMENT PROCEDURES TABLE OF CONTENTS Page 1. Adjustment & Inspection Tools.................... 4-2 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.

  • Page 49: Adjustment & Inspection Tools

    1. Adjustment & Inspection Tools (A) Color Analyzer (B) Signal Generator CHROMA 2135 or compatible (C) Multi Meter (D) Hi-Voltage Probe (E) Convergence Meter (F) Degaussing Probe (G) Power Meter (H) Automatic Alignment system Timing Table (Factory Mode –20 Modes) MODE RESOLUTION H-SYNC EREQ.

  • Page 50: Hot Key Operation

    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) Auto Alignment Mode: power on + ‘-‘...
  • Page 51 TAB 5) TOOLS 1 : Vertical Focus TAB 7) INFORMATION : Burnin Type Select : MCU Version : Destination : Hours Running...

  • Page 52: B+ Check

    5. B+ Check (A) Mode: No.12. (B) Pattern: Full White. (Brightness set to cut off) (C) Check other power sources are: 82V ±2V, 13.6V ±0.3V, 6.2V ±0.3V, 49V ±1.5V, -11.5V ±0.5V. 6. X-RAY Test (A) Mode: No.12 (B) Pattern: Normal Crosshatch (Brightness just cut off) (C) Test Apply a resistor(39K, 1/4W, 1%) between TP3 and TP4 then power on, Monitor should be active in X-Ray protector.

  • Page 53: Preset Picture Size And Position Adjustment

    9. Preset Picture Size and position Adjustment (A) Factory mode setting (B) Signal: All signals Pattern: Cross hatch * Perform the preset picture size and position adjustment for above all signals. (C) Select the “ ” icon, then set to 70%. (D) Select the “...
  • Page 54 3) Adjust R.Gain control and B.Gain control to x=283, y=297 (Pattern: Full White). 2. 8200K (Select color Mode 8200K) 1) 50*50mm Green block Pattern, Brightness Control set to Max., Contrast Control set to Max, Adjust G.Gain control to Y=154cd/m 2) Video signal off 0.Vp-p), Brightness control set to 0.2cd/m 3) Adjust R.Gain control and B.Gain control to x=290, y=313 (Pattern: Full White).

  • Page 55: Focus Adjustment

    (E) “SB MODE” White Balance Adjustment (Select the color Mode SB MODE) 1) Select the color mode “SB Mode”. 2) Video signal off (0Vp-p), Adjust brightness to 0.1 cd/m , contrast to Max. 3) Change pattern to 50*50 green block, Adjust G.Gain control to Y=223 cd/m 4) Change pattern to 50*50 white block, Adjust R.Gain and B.Gain to x=283, y=297.

  • Page 56: Convergence Adjustment

    13. Convergence Adjustment CH : Convergence error of horizontal direction CV : Convergence error of vertical direction (1) Receive signal 14 (Cross hatch pattern). (2) Measure convergence error. If it is out of spec, adjust convergence by 4-pole magnets and 6-pole magnets.

  • Page 57: Distortion Adjustment

    15. 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.14 in step 1 ~ 3. Perform the adjust for above all signal in step 4 ~ 5. 1.

  • Page 58: Setting Before Shipment

    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.

  • Page 59: Adjustment Magnetic Field

    17. Adjustment Magnetic Field Vertical: +40uT, Horizontal: ±0uT(Neutral) * Notes About Degaussing Method Follow the degaussing procedure as below. (For 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.
  • Page 60 18. TIMING SHEET Rev1.0 Preset Mode No. VGA350 VGA400 VGA480 MACII 800*600 8514/A Signal Name (35k) (56) 640*350 640*400 640*480 640*480 800*600 1024*768 Resolution 25.175 25.175 25.175 30.240 36.000 44.900 Dot Clock (MHz) 31.47 31.47 31.47 35.00 35.16 35.52 (kHz) 70.09 70.09 59.94...
  • Page 61 Preset Mode No. 640*480 EVGA400 800*600 640*480 800*600 10*7(60) Signal Name (75) (VESA) (60) (85) (75) (VESA) 640*480 640*400 800*600 640*480 800*600 1024*768 Resolution 31.500 31.5000 40.000 36.000 49.500 65.000 Dot Clock (MHz) 37.50 37.86 37.88 43.27 46.88 48.36 (kHz) 75.00 84.13 60.32...
  • Page 62 Preset Mode No. MACII 800*600 10*7(70) 10*7(75) 640*480 12*10(60) Signal Name (49.7k) (85) (VESA) (VESA) (120) (VESA) 832*624 800*600 1024*768 1024*768 640*480 1280*1024 Resolution 57.286 56.250 75.000 78.750 55.00 108.000 Dot Clock (MHz) 63.66 49.73 53.67 56.48 60.02 63.98 (kHz) 74.55 85.06 70.07...
  • Page 63 Preset Mode No. 800*600 1024*768 Signal Name (100) (85) 800*600 1024*768 Resolution 67.50 94.5 Dot Clock (MHz) 63.92 68.677 (kHz) 100.03 (Hz) 1056 1376 Total (dot) 15.64 14.561 (uS) 1024 Disp (dot) 11.852 10.836 (uS) Front (dot) 0.593 0.508 (uS) Sync Pulse (dot) 1.185...
  • Page 64 INSPECTION TABLE OF CONTENTS Page 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...

  • Page 65: Scope

    1.Scope 1.1 Introduction This document defines the design and performance requirements for a 17 inch (16 inch Viewable), color display monitor. This monitor shall use a 17 inch Flat Aperture Grille type CRT. This monitor is capable of maximum resolution of 1280 x 1024 pixels at 66 Hz non-interlaced mode, and is capable of horizontal frequencies between 30kHz and 70kHz.

  • Page 66: General Description

    1.2 General Description 1.2.1 Display Part MODEL:1702 Item Spec. REMARKS 1 CRT Vendor / Model No. Mitsubishi / M41LRY61X22 Type Diamondtron M2 (Aperture Grille) Size 43cm / 406mm Diagnonal Viewable Image (17" / 16" Diagonal Viewable Image) Grille pitch(Phosphor pitch) Approx.0.25mm (Approx.0.26mm)

  • Page 67: Regulations

    1.3 Regulations GEOGRAPHICAL REGULATIONS REGION SAFETY X-RAY ELF/VLF Power Ergonomics Miscellaneous Management And others Dplus74SB-BK(A) FCC-B DHHS MPR-III Energy Star TUV-GS CE Marking C-UL DOC-B Red Act TCO’99 TCO’99 (IS9241-3 WHQL (White) (White) IS9241-7 (Win ME, TUV/GS IS9241-8) Win 2000, TCO’95 TCO’95 Win XP)

  • Page 68: Regulation Information & Marking Location

    1.4 Regulation Information & Marking Location Marking Regulation Information Location UL1950 3rd Edition (or UL60950 3 edition) 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) EK1-ITB 2000,ISO9241-3: 1992, ISO9241-7: 1998, ISO9241-8: 1997 Singapore Safety CCIB Chinese Safety &...

  • Page 69: Crt Specifications

    2. CRT Specifications Vendor Mitsubishi CRT Model No. M41LRY61X22 Type Diamondtron M2 (Aperture Grille) Size 448.8 mm (17” diagonal surface) 406.4 mm (16” diagonal viewable image) Grille pitch (Phosphor pitch) Approx.0.25mm (Approx. 0.26mm) Deflection Angle 90 degree Phosphor Type Electron Gun Type...

  • Page 70: Electric Specifications

    3. Electric Specifications 3.1 Deflections Scanning Frequency 30.0 – 70.0 kHz Back Porch ≥ 0.2 µsec Horizontal ≥ 3.6 µsec Blanking H-sync Width ≥ 0.8 µsec Scanning frequency 50 – 120 Hz ≥ 500 µsec V-sync + V-back Porch Vertical V-sync Width 2H ≤...

  • Page 71: Power Supply

    3.4 Power Supply 100 – 240 VAC ± 10% Input Voltage 50 - 60Hz ± 3Hz Frequency Power Consumption (Max.) 70W 100 – 240VAC, 1.5A Condition: Input voltage:100 - 240VAC Signal: No.13 (1024x768(85Hz), (All white)) Contrast: Max, Brightness: Max, H/V size: full scan Others: default position (Typical) 65W @ 120VAC /60Hz...

  • Page 72: Functions

    4. Functions 4.1 Display Part 4.1.1 Front Controls a : POWER SWITCH b : POWER INDICATOR c : EXIT BUTTON d : ITEM SELECT BUTTONS e : FUNCTION ADJUST BUTTONS f : SELECT & SB Mode BUTTON g : RESET BUTTON SB MODE <...
  • Page 73 4.1.2 OSM (On Screen Manager) Function 4.1.2.1 OSM Menu Tab 1 Tab 2 Tab 3 Tab 4 5-10...
  • Page 74 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...
  • Page 75 Tab 6 Factory Preset Tab 7 (URL indication) Tab 7 (Display Mode) Tab 7 (Monitor info.) Tab 7 (Refresh Notifier) Refresh Notifier 5-12...
  • Page 76 Item Reset Tab Reset Factory Preset Others 5-13...
  • Page 77 URL indication WWW.NECMITSUBISHI.COM Display Mode FH : Horizontal Frequency & Polarity FV : Vertical Frequency & Polarity Monitor Info. Mitsubishi Brand:“DPLUS74SB” & Serial Number Refresh Notifier OFF/ON Cursor move to Left/Right others Super Bright Mode OFF/ON Can switch “OFF/ON” by “SERECT”...
  • Page 78 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) Signal Red-video Green-video Blue-video DDC Gnd...
  • Page 79 4.1.5 DDC (Display Data Channel) Functions VESA DDC 2B (EDID data only), (Support 9 pin – 5V) VESA DDC/CI (The details is written at “DDC/CI Command & VCP for NPG design model” ) 4.1.6 Preset Timing Factory-presets: 13 (See Appendix 1 for detail timing parameters.) (Signal Nos.3,7,10,13 are adjustment Signals and Signal Nos.2, 4, 5, 6, 8, 9, 11, 12 are rough adjustment Signals.) User-presets : 7...

  • Page 80: Display Quality

    5. Display Quality 5.1 Basic Test Conditions AC Voltage 120VAC 60Hz or 220VAC 50Hz Video Signal No.13, 1024 x 768 (85Hz) (fH=68.7kHz fV=85Hz) Video signal 0.70 ±0.01Vp-p Picture Reverse cross hatch pattern Warm Up More than 30 min. with full white picture Temperature 20 –...

  • Page 81: Luminance (Brightness)

    5.2.1 Size and Position Control Ranges Signal No.2 to 13 The horizontal and vertical size control should be Size Control Ranges controllable to “FullScan” at the maximum position. * Except MAC Signal (Signal No. 4, 9) Signal No.1 to 13 Image position can be controlled to the center Position Control Ranges position of the bezel opening.

  • Page 82: Color

    5.4 Color Signal No.13 (1024*768@85Hz) 5.4.1Color Temperature Color-1: 9300K + 8 M.P.C.D. (Window pattern) Xref=0.283 ± 0.015 (H:33%,V:33%) Yref=0.297 ± 0.015 Color-2: 8200K Contrast : Max. X=0.290 ± 0.015 Brightness : Cut off Y=0.313 ± 0.015 Color-3: 7500K X=0.300 ± 0.015 Y=0.315 ±...

  • Page 83: Geometric Distortion

    5.5 Geometric Distortion 5.5.1 Raster Rotation/Tilt Signal No. 3, 7, 10, 13 | a - b | ≤ 1.8 mm θ or -0.5 degree ≤ θ ≤ ± 0.5 degree Bezel 5.5.2 Pincushion Signal No. 3, 7, 10, 13 : d1 ≤ 1.5 mm : b1 ≤...

  • Page 84: Linearity

    5.6 Linearity H: ≤ 20%(30-43k) , ≤ 12%(43-55k) , ≤ 10%(55-70k) , adjacent: ≤ 7% Linearity V: ≤ 10% , adjacent: ≤ 7% * at preset timings * With Green-Crosshatch (17 lines horizontally by 13 lines vertically ) applied. * The formula used to calculate linearity is: Xmax –...

  • Page 85: Focus

    5.8 Focus Focus Resolution: 1024 x 768 (85Hz) Character: 7 x 9 pixel ”∃” Signal No.13 Color : White Contrast : Max. Judgment: Brightness: Cut off “∃” character are readable with clearly at the whole screen. 9 lines The gap between lines should be crisp.

  • Page 86: Crt Screen And Faceplate Blemish Limits

    6. CRT Screen and Faceplate Blemish Limits 6.1 CRT Face Plate Defect 6.1.1 Inspection Condition (1) In the operating condition, observe the defect on the screen under following condition. 9,300K (x=0.283, y=0.297) white raster or the element monochrome raster which its brightness is 34cd/m (10ft⋅L) on the screen center surrounding light is about 10 Lux.

  • Page 87: Ar-Film's Surface Defect

    (2) Face plate defect (a) Blisters, opaque spots and elongated closed blisters Average diameter Allowable number (pcs) Minimum Separation (mm) #1 Zone A Zone B Total (mm) 0.76 ~ 0.51 ~ 0.75 0.26 ~ 0.50 0.11 ~ 0.25 #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) #2:Maximum 5 pcs.
  • Page 88 6.2.2 Division of Zone A 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 : 300 mm, V : 225 mm zone B : Area outside zone A and inside the fluorescent surface edge.
  • Page 89 Standard Average diameter classified by a contrast Allowable number Allowable Length (Note 1) (mm) (mm) High contrast Middle Low contrast zone A zone B contrast ~ 0.10 ~ 0.20 ~ 0.50 Ignore Ignore 0.11 ~ 0.25 0.21 ~ 0.50 0.51 ~ 1.25 2［4］...

  • Page 90: Inspection Of Plug & Play Communication And Osm "Monitor Information" For Model Name/ Serial Number

    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.599910508 Part No. 599910529 Signal Cable DESKTOP/NOTE Printer Cable EDID JIG (NPG) Signal Generator...
  • Page 91 i. Press the Enter key. Then, the EDID data, OSM model name, and the serial number begin to be written in. j. Display “MONITOR INFO.” of the OSM, and confirm that the model name and serial number have been correctly written. k.

  • Page 92: Error Messages

    7.5 Error Messages • IIC Communication Error Communication disabled • EDID Check Sum Error Entry of false EDID • DDC1 Does Not Find Head Data DDC1 Communication disabled • DDC2 Does Not Find Head Data DDC2 Communication disabled 7.6 EDID Data File The EDID data file text is shown below.

  • Page 93: Appendix 1 Preset Timing Chart

    Appendix 1 Preset Timing Chart [ H-SYNC ] [ VIDEO ] [ V-SYNC ] [ VIDEO ] Preset Signal Clock Signal Name (uSec) (uSec) (uSec) (uSec) (uSec) (mSec) (mSec) (mSec) (mSec) (mSec) (MHz) (kHz) (Hz) Hs Vs (dot) (dot) (dot) (dot) (dot) (line)
  • Page 94 TROUBLE SHOOTING TABLE OF CONTENTS Refer to User’s Manual trouble shooting section before using this chart. Page 1. NO OPERATION, POWER LED FLASH ............... 6-2 2. NO OPERATION, POWER LED OFF ................6-3 3. VIDEO NOISE, UNSYNCHRONOUS ................6-4 4. NO VIDEO ........................6-5 5.

  • Page 95: No Operation, Power Led Flash

    1. NO OPERATION, POWER LED FLASH POWER LED FLASH POWER SW TURN OFF MULTIMETER TEST Q307, U302 D110, D111, D112, D113 1. DC P/S O/P VOLTAGE SET AT 12V,CURRENT 600MA. POSITIVE CONNECT C330”+”. NEGATIVE CONNECT TO U302-pin 7. 2. SCOPE SET AT 10V/DIV, 10US/DIV, PROBE CHECK CONNECT TO Q319-GATE AND U302pin 6.

  • Page 96: No Operation, Power Led Off

    2. NO OPERATION, POWER LED OFF POWER SW TURN OFF CHECK F101 CHECK Q101 1. DC P/S O/P VOLTAGE SET AT 17V,CURRENT SET AT 200MA. POSITIVE CONNECT TO C109”+”. NEGATIVE CONNECT TO C105”-“. CHECK SCOPE SET AT 10V/DIV, 10US/DIV, PROBE U101 CONNECT TO Q101-GATE AND C105”-“.

  • Page 97: Video Noise, Unsynchronous

    3. VIDEO NOISE, UNSYNCHRONOUS CHECK Q101 G-S FREQUENCY CHECK D124, R116 CHECK HORIZONTAL SYNCRONIZE D109, R115, R117 FREQUENCY D124 TO GND WITH H-SYNC CHECK Q319 G-S FREQUENCY CHECK HORIZONTAL CHECK R30X, FBT SYNCRONIZE FREQUENCY C359 TO GND PIN6 WITH H-SYNC NORMAL OPERATION...

  • Page 98: No Video

    4. NO VIDEO NO VIDEO CHECK REFER TO SCREEN CONTROL “NO RASTER” CLOCKWISE ON PAGE CHECK TROUBLE IN U201 PIN 5, 6, 7 R/G/B SIGNAL, SIGNAL LEVEL SIGNAL CABLE CHECK PROBLEM IN U201 U201 PIN 18, 19, 20 CLAMP (PIN 23) SIGNAL LEVEL U201 12V VOLTAGE CHECK...

  • Page 99: No Raster

    5. NO RASTER NO RASTER POWER SUPPLY CHECK CHECK CHECK PROBLEM IN U302 PIN 14, 15 MCU U701 H/V SYNC CHECK PROBLEM IN U302 PIN 18, 19, 8 U701, U302 SYNC CHECK PROBLEM IN T301 PIN 3 VOLTAGE U302, Q319, D335, L304 56V, 68V(AT H-FREQ.

  • Page 100: Trouble In H. V Sync

    6. TROUBLE IN H. V SYNC PROBLEM IN HOR. OR VER. SYNC CHECK CONNECTOR S702 PROBLEM IN (PIN4, 5), SIGNAL SIGNAL CABLE CHECK PROBLEM IN U701 (PIN 40,39) H/V SYNC LINE & H/V SYNC. Q301, Q401 SIGNAL CHECK CHECK PROBLEM IN U701 (PIN 32,33) U701 (PIN 5) 5V LINE...

  • Page 101: Poor Pincushion

    7. POOR PINCUSHION POOR PINCUSHION CHECK U301, PARABOLA Q316~Q318 WAVE CHECK U302 PIN 11 CHECK R390, U301 PARABOLA CHECK U302 PIN 14 CHECK 12V & U302 SYNC INPUT CHECK U701 (PIN 32) OUTPUT...

  • Page 102: Circuit Description

    CIRCUIT DESCRIPTION TABLE OF CONTENTS page 1. Power supply circuit ..................... 7-2 2. MCU ........................7-5 3. Horizontal deflection signal processing / Vertical and geometrical raster compensation ............7-21 4. Horizontal drive and power supply output ..............7-33 5. Horizontal amplitude control .................. 7-34 6.

  • Page 103: Power Supply Circuit

    1. Power supply circuit 1.1 Outline This power supply unit uses switching mode technology, and is an off-line mode type unit that provides several different DC outputs. The scanning frequency is available in different values ranging from 31 kHz to 69 kHz.
  • Page 104 2) The power supply MOS FET Q101 carries out the ON/OFF operation of the control unit, by means of U101 KA3842A. KA3842A is a PWM (pulse width modulation) IC chip, with 16 V starting voltage and 10 V cut-off voltage. The following list shows the pin layout of KA3842A pulse width modulation IC chip.
  • Page 105 1.7 Power saving Suspend mode : Every DC voltage operation of the CRT is turned OFF. The color of the power LED101 switches from green to orange. OFF mode : This is the mode in which the CPU control unit turns OFF the power supply, but the power turns ON when the user touches the keyboard.

  • Page 106: Mcu

    2. MCU Monitor MCU Specification Frequency Specification H-freq. : 29.5K – 70kHz V-freq. : 43 – 160Hz Judge polarity only when horizontal frequency is 31.5 kHz and 37.8 kHz Support composite sync detection System Architecture MCU – Weltrend WT6260, 60K bytes ROM size EEPROM –...
  • Page 107 3. Power saving – 2 pins (PMUS, PMUO) for power saving control – if Hf > 70kHz or Hf < 23kHz, enter power saving mode (suspend). – enter power saving mode after 3 sec when condition is met. – enter suspend mode first for 3 sec before enter off mode if off mode condition is met. Mode H-sync freq.
  • Page 108 WT62P2 v1.04 USB Monitor Controller GENERAL DESCRIPTION The WT62P2 is a microcontroller for digital controlled monitor with Universal Serial Bus (USB) interface. It contains an 8-bit CUP, 60K bytes Flash memory, 1024 bytes RAM, 256 bits bit-addressable RAM, 14 PWMs, parallel I/Os, SYNC signal processor, timer, DDC1/2B interface, master/slave IC interface, low speed USB device module, 6-bit A/D converter and watch-dog timer.
  • Page 109 WT62P2 v1.04 USB Monitor Controller 42-pin PDIP * 40-pin PDIP is used in this model. 42-pin SPDIP 40-pin PDIP PWM2 PWM2 PWM1 PWM1 PWM0 PWM0 PWM3 PWM3 RESET/3V3 RESET/3V3 PD5/PWM4 PD5/PWM4 PD4/PWM5 PD4/PWM5 PD3/PWM6 PD3/PWM6 OSCO PD2/PWM7 OSCO PD2/PWM7 PD1/HOUT PD1/HOUT OSCI OSCI...
  • Page 110 WT62P2 v1.04 USB Monitor Controller PIN ASSIGNMENT AND PACKAGE TYPE Pin No. Pin Name Descriptions L40 S44 42 40 - D+ I/O USB D+ signal. 1 PWM2 O PWM2 output (10V open-drain). 2 PWM1 O PWM1 output (5V open-drain). 3 PWM0 O PWM0 output (5V open-drain).
  • Page 111 WT62P2 v1.04 USB Monitor Controller 40 41 39 38 PWM3 I/O PWM3 output (10V open-drain) 41 42 40 39 HIN Hsync input. 42 43 41 40 VIN Vsync input. - NC No Connection. 44 44 42 - D- I/O USB D-signal. PIN DESCRIPTION FUNCTIONAL DESCRIPTION 8-bit 6502 compatible CPU wiht 16-bit address bus and 8-bit data bus operates at 6MHz.The non-...
  • Page 112 WT62P2 v1.04 USB Monitor Controller $FFFEh (low byte) and $FFFFh (high byte): INT1 interrupt vector. $0000h Registers $003Fh $0040h Reserved $007Fh $0080h 128 bytes RAM $00FFh $0100h 256 bytes RAM $01FFh $0200h 256 bytes RAM $02FFh $0300h 256 bytes RAM $03FFh $0400h 128 bytes RAM...
  • Page 113 RESET/3V3 LATCH Watchdog Timer Reset Low VDD Reset Peripheral Circuits Address 2.048ms Illegal Address Reset 6MHz Timer Fig. 1 Reset Signals Memory Mapping External Reset A low level on the RESET/3.3V pin will generate reset. Illegal address Reset When the address bus of CPU goes to illegal address, a reset pulse will be generated. The illegal address is defined as $0040h~$007Fh, $0300h~$0FFEh and $1000h~$7FFFh.
  • Page 114 I/O Port I/O Port A Pin PA0 and PA1 are shared with DDC interface SDA1 and SCL1 When ENDDC bit is “0”, these two pins become an I/O port. If PA0OE bit is set, Pin PA0 is an open-drain output. If PA0OE is cleared, Pin PA0 is an input pin with no internal pull-up resistor.
  • Page 115 SYNC Processor The functional block diagram of SYNC Processor is shown in Fig. 4. It contains H and V polarity detection circuit, H and V frequency counter, composite sync signal separation circuit, free-running H and V sync signal generator, vedio signal generation circuit for burn-in test and clamp pulse generator. Fig.4 Block diagram of sync signal processor Horizontal Polarity Detect The horizontal polarity is detected by sampling HIN signal at 5.5~6.5us after rising and falling edge of HIN.
  • Page 116 Composite Sync Signal Separator Composite sync signal separator extract Vsync signal from HIN or SOGIN input pin by filtering pulses which is less than 6us. The output Vsync signal will be widened about 5.5~6.5us. The output Hsync will be replaced by 2us pulse during Vsync pulse. The composite sync signal separator can handle H+V and H exclusive OR V signals.
  • Page 117 Free-running sync signal and self-test pattern The self-generated free run sync signals are output from HOUT and VOUT pins when ENFREE bit is set. Four kinds of standard VESA timings are selected by FREE1 and FREE0 bits. Self-test pattern signal is output form PAT pin when ENPAT bit is set. PAT1 and PAT0 bits select different self-test pattern.
  • Page 118 DDC Flow Chart 7-17...
  • Page 119 Master I²C Flow Chart 7-18...
  • Page 120 Master I²C (restart mode) Flow Chart 7-19...
  • Page 121 Slave I²C Flow Chart 7-20...

  • Page 122: Horizontal Deflection Signal Processing

    3. Horizontal deflection signal processing / Vertical and geometrical compensa- tion of the raster I²C-bus autosync deflection controller for PC monitors TDA4857 FEATURES Concept features Vertical section • Full horizotal plus vertical autosync capability • I²C-bus controllable vertical picture size, picture •...
  • Page 123 I²C-bus autosync deflection controller for PC monitors TDA4857 BLOCK DIAGRAM 7-22...
  • Page 124 I²C-bus autosync deflection controller for PC monitors TDA4857 PINNING SYMBOL DESCRIPTION HFLB horizontal flyback input XRAY X-ray protection input B+ control OTA output BSENS B+ control comparator input B+ control OTA input BDRV B+ control driver output PGND power ground HDRV horizontal driver output XSEL...
  • Page 125 I²C-bus autosync deflection controller for PC monitors TDA4857 Vertical sync integrator Normalized composite sync signals from HSYNC are inte- grated on an internal capacitor in order to extract vertical sync pulses. The integration time is dependent on the hori- zontal oscillator reference current at HREF (pin 28). The integrator output directly triggers the vertical oscillator.
  • Page 126 I²C-bus autosync deflection controller for PC monitors TDA4857 Frequency-locked loop Horizontal oscillator The frequency-locked loop can lock the horizontal oscilla- The horizontal oscillator is of the relaxation type and re- tor over a wide frequency range. This is achieved by a com- quires a capacitor of 10 nF at HCAP (pin 29).
  • Page 127 I²C-bus autosync deflection controller for PC monitors TDA4857 The formulae for R also takes into account the voltage An external modulation of the PLL2 phase is not allowed, HBUF swing across this resistor: because this would disturb the pre-correction of the hori- zontal focus parabola.
  • Page 128 I²C-bus autosync deflection controller for PC monitors TDA4857 X-ray protection Table 2 Calculation of f total spread fr(V) Contributing elements The X-ray protection input XRAY (pin 2) provides a voltage Minimum frequency offset between f fr(v) detector with a precise threshold. If the input voltage at lowest trigger frequency XRAY exceeds this threshold for a certain time, then con- Spread of IC...
  • Page 129 I²C-bus autosync deflection controller for PC monitors TDA4857 Adjustment of vertical position, vertical linearity and ver- The pincushion (EW parabola) amplitude, corner and tra- tical linearity balance pezium correction track with the vertical picture size (VSIZE) Register VOFFS provides a DC shift at the sawtooth out- and also with the adjustment for vertical picture position puts VOUT1 and VOUT2 (pin 13 and 12) without affecting (VPOS).
  • Page 130 I²C-bus autosync deflection controller for PC monitors TDA4857 Two different modes of operation can be chosen for the Dynamic focus section [FOCUS (pin 32)] EW output waveform via control bit FHMULT: This section generates a complete drive signal for dynamic 1.
  • Page 131 I²C-bus autosync deflection controller for PC monitors TDA4857 An internal discharge circuit allows a well defined dis- Supply voltage stabilizer, references, start-up charge of capacitors at BSENS. BDRV is active at a LOW- procedures and protection functions level output voltage (see Fig. 22), thus it requires an exter- nal inverting driver stage.
  • Page 132 I²C-bus autosync deflection controller for PC monitors TDA4857 Power dip recognition Table 3 Activation of protection mode ACTIVATION RESET In standby mode the I²C-bus will only answer with an Low supply voltage at increase supply voltage; acknowledge, when data is sent to control register with pin10 reload registers;...
  • Page 133 I²C-bus autosync deflection controller for PC monitors TDA4857 APPLICATION INFORMATION 7-32...

  • Page 134: Horizontal Drive And Power Supply Output

    4. Horizontal drive and power supply output Circuit Diagram Description of the circuit: 1) R1, T1 and Q2 compose the horizontal driving circuit, and transistor Q1 generates a horizontal output through the driving signal. IB1 = I / Q1h CPMAX feMIN = 3I di/dt = 3.3 A/...

  • Page 135: Horizontal Amplitude Control

    5. Horizontal amplitude control Circuit Diagram Circuit Description: +28V H-Width 1) Diodes D1 and D2 compose the bipolar modulation circuit, and have the function of controlling the currents of the coils DY(lpp) and Lm(lm) through voltage modulation carried out by utilizing VM. →...

  • Page 136: Blanking And Spot Killer

    6. Blanking and spot killer Circuit Diagram V-SYNC MUTE V-OUT BRIGHT CONTER Circuit Description: 1) The vertical blanking circuit is composed of Q1, Q2, Q3 and peripheral circuit. The vertical sync pulse applied to R3, R12 connected to Q5 base. Q5 is invert amplifier, then mixed with Q1 base together for vertical retrace compensation time of the blanking pulse.

  • Page 137: Video Amplifier System

    7. Video amplifier system LM1269 110 MHz I²C RGB Video Amplifier System with OSD & DACs General Description The LM1269 pre-amp is an integrated CMOS CRT pre-amp. The IC is I2C compatible, and allows control of all the parameters necessary to direct setup and adjust the gain and contrast in the CRT display.
  • Page 138 Pin Descriptions Pin Descriptions Pin No. Pin Name Schematic Description Red OSD Input These inputs accept standard TTL or Green OSD Input CMOS input. Each color is either fully on Blue OSD Input (logic high) or fully off (logic low). Unused pins should be connected to ground with a 47k resistor.
  • Page 139 Pin Descriptions Pin No. Pin Name Schematic Description Red Video Input Video inputs. These inputs must be AC Green Video Input coupled with a 0.047 µF cap. DC restoration Blue Video Input is done at these inputs. A series resistor of about 33 Ω...

  • Page 140: Function Description

    Function Description Pin No. Pin Name Schematic Description Red Video Out Video outputs of the LM1269. The ideal Green Video Out driver for this part is the LM246X CRT driver Blue Video Out family, which has the necessary gain of 26 dB or 20 V/V.
  • Page 141 All functions of the LM1269 are controlled through the I²C Bus. Details on the internal registers are covered in the I²C Interface Registers Section. Figure 1 shows the block diagram of the OSD contrast giving four video levels for the OSD window. Maxi- LM1269.
  • Page 142 horizontal blanking to the output of video signal. This enables the user to blank at the cathodes during horizontal flyback. An optional capacitor and/or resistor to ground may be needed if noise interferes with the H Flyback signal. This feature gives very accurate timing for the horizontal blank- ing;...
  • Page 143 ance and brightness control. If the brightness control is done at The ESD cells of the LM1269 also provide good protection G1, then three DACs would be used for color balance and the against arc-over, however good PCB layout is necessary. The last DAC would be used for controlling the G1 voltage.

  • Page 144: Ns Hight Gain Crt Driver

    8. 9nS Hight Gain CRT Driver LM2469 Monolothic Triple 9nS High Gain CRT Driver • 0V to 3.75V input range Gerenral Description • Stable with 0-20pF capacitive loads and inductive peaking networks The LM2469 is an integrated high voltage CRT driver circuit •...
  • Page 145 THEORY OF OPERATION connected from the bias pin (V ) to the ground, as close as is practical to the part. The LM2469 is high voltage monolithic three channel CRT driver suitable for color monitor applications. The LM2469 operates ARC PROTECTION During normal CRT operation, internal arcing may occasion- with 80V and 12V power supplies.
  • Page 146 OPTIMIZING TRANSIENT RESPONSE TYPICAL APPLICATION The typical application of the LM2469 is shown in Figure 5 & 6. Referring to Figure 4, there are three components (R1, R2 and Used in conjunction with an LM126X and an LM2479/2480 bias L1) that can be adjusted to optimize the transient response of clamp, a complete video channel from monitor input to CRT the application circuit.
  • Page 147 7-46...

  • Page 148: Block Diagrams

    9. Bias Clamp LM2480 80V Triple Bias Clamp • High input impedance General Description The LM2480 driver is an integrated 80V triple bias • Single supply operation • Matched to the LM126X family of preamplifiers clamp circuit for DC recovery of each of the AC coupled outputs of a CRT driver.
  • Page 149 Typical Performance Characteristics electrolytic capacitor should also be placed reasonably (VCC = +80V), Test Circuit – Figure 3 unless other- close to the LM2480’s supply and ground pins. wise specified. Application Circuit The application circuit shown in Figure 5 is designed to help clamp the voltage at the output of the driver to the desired level.

  • Page 150: On Screen Display

    10. On Screen Display MTV030 On-Screen Display with Auto-Sizing Controller GENERAL DESCRIPTION FEATURES • Horizontal SYNC input up to 150 kHz. MTV030 is designed for monitor applications to display built-in • On-chip PLL circuitry up to 150MHz. characters or fonts onto monitor screen. The display operation •...
  • Page 151 1.0 CONNECTION DIAGRAM * MTV030N16 is used in this Model. 2.0 PIN DESCRIPTIONS Pin No. Name Descriptions N16 N201 N202 N24 VSSA Analog ground. This ground pin is used to internal analog circuitry. Voltage Control Oscillator. This pin is used to control the internal oscillator frequency by DC voltage input from external low pass filter.
  • Page 152 Pin No. Name Descriptions N16 N201 N202 N24 Serial interface enable. It is used to enable the serial data and is also used to select the operation of I²C or SPI bus. If this pin is left floating, I²C bus is enabled, otherwise the SPI bus is enabled.

  • Page 153: Replacement Parts List

    REPLACEMENT PARTS LIST The components specified for Model DPlus74SB/DPlus74SB-BK *** CRT BOARD *** Part No. for NPG Part No. for NMV DESCRIPTION LOCATION Q'TY REMARK HC006002 79PQ1104 BEAD 3.5X4.7/T B201 HC005003 79PQ1594 BEAD 3.5X8/T B202 80000561 79PQ1232 BEAD 3.5x6x0.8/T B203 80000561 79PQ1232 BEAD 3.5x6x0.8/T...
  • Page 154 80000051 79PQ0017 DIODE/T 1/2W 1SS82 D212 80001211 79PQ0724 DIODE/T 1/2W BAV21 (PHILIPS) D212 80004711 79PQ1755 ROHM DIODE 1SS244 D212 80000451 79PQ0043 DIODE/T 1/2W 1SS83 D213 80000051 79PQ0017 DIODE/T 1/2W 1SS82 D213 80001211 79PQ0724 DIODE/T 1/2W BAV21 (PHILIPS) D213 80004711 79PQ1755 ROHM DIODE 1SS244 D213 80000451...
  • Page 155 HB013129 79PQ1751 PACKING COIL /T 1.2uH K(EC24) L211 HB013278 79PQ1752 PACKING COIL /T 0.27uH K(EC24) L230 HB013828 79PQ1278 PACKING COIL /T 0.82uH K(EC24) L231 HB013278 79PQ1752 PACKING COIL /T 0.27uH K(EC24) L250 HB013129 79PQ1751 PACKING COIL /T 1.2uH K(EC24) L251 EAA18157 79PQ0734 TR NPN 2SC1815GR TO-92(T) (T.P.S.)
  • Page 156 GB9332H8 79PQ1381 CERAMIC Z5V(F)/T 3300P/1KV Z C285 GB8472H5 79PQ2450 CERAMIC Z5U(E)/T 4700/1KV M C286 R0224070 SINGLE PIN 1P L=14mm 2.36mm CRT GND 12600112 HEAT SINK (VIDEO) FOR U204 14000041 SCREW (P-#2CBRITS*3*8*15BF) FOR U204 HB000008 79PQ0276 CHOKE COIL 100uH 8X10 L201 HB000008 79PQ0276 CHOKE COIL 100uH 8X10...
  • Page 157 GAJ10825 79PQ2343 ELECT CAP 105oC/T 1000u/16V M PF C121 GB7101H3 79PQ1089 CERAMIC Y5P(B)/T 100P/1KV K C127 GA347725 79PQ0851 ELECT 85oC/T 470u/16V M C136 GA347625 79PQ0210 ELECT 85oC/T 47u/16V M C137 GAH47725 79PQ1986 ELECT CAP 105oC/T 470u/16V M TK C139 GAJ47725 ELECT CAP 105oC/T 470u/16V M PF C139 GB747153...
  • Page 158 GE247352 79PQ2236 PLASTIC PEI/T 0.047u/50V J C364 GF210352 79PQ0751 MEF CAP BOX 0.01u/50V J C365 GF210362 79PQ0252 MEF CAP BOX 0.01u/63V J C365 GF256252 79PQ2239 MEF CAP BOX 0.0056u/50V J C366 GF256262 MEF CAP BOX 0.0056u/63V J C366 GA347635 79PQ0211 ELECT 85oC/T 47u/25V M C368 GA310655...
  • Page 159 EJAC0017 79PQ0068 DIODE/T 1A 1N4936 D132 EJ044148 79PQ0065 DIODE "T" 1N4148 D303 EJ044148 79PQ0065 DIODE "T" 1N4148 D304 EJA05819 79PQ1644 DIODE STKY/T 1A/40V 1N5819 D305 EJAC0017 79PQ0068 DIODE/T 1A 1N4936 D310 EJ044148 79PQ0065 DIODE "T" 1N4148 D311 EJAC0018 79PQ1251 DIODE/T 1A 1N4937 D312 EJ044148 79PQ0065...
  • Page 160 R0319110 JUMPER WIRE AI/T 7.5mm J105 R0319110 JUMPER WIRE AI/T 17.5mm J106 R0319110 JUMPER WIRE AI/T 15mm J107 R0319110 JUMPER WIRE AI/T 17.5mm J108 R0319110 JUMPER WIRE AI/T 15mm J109 R0319110 JUMPER WIRE AI/T 12.5mm R0319110 JUMPER WIRE AI/T 15mm J110 R0319110 JUMPER WIRE AI/T 7.5mm...
  • Page 161 R0319110 JUMPER WIRE AI/T 7.5mm R0319110 JUMPER WIRE AI/T 15mm R0319110 JUMPER WIRE AI/T 10mm R0319110 JUMPER WIRE AI/T 10mm R0319110 JUMPER WIRE AI/T 7.5mm R0319110 JUMPER WIRE AI/T 20mm R0319110 JUMPER WIRE AI/T 7.5mm R0319110 JUMPER WIRE AI/T 15mm R0319110 JUMPER WIRE AI/T 10mm R0319110...
  • Page 162 R0319110 JUMPER WIRE AI/T 12.5mm R0319110 JUMPER WIRE AI/T 12.5mm R0319110 JUMPER WIRE AI/T 20mm R0319110 JUMPER WIRE AI/T 7.5mm R0319110 JUMPER WIRE AI/T 20mm R0319110 JUMPER WIRE AI/T 15mm R0319110 JUMPER WIRE AI/T 15mm R0319110 JUMPER WIRE AI/T 10mm R0319110 JUMPER WIRE AI/T 12.5mm R0319110...
  • Page 163 EBA10205 79PQ1685 TR PNP 2SA1020Y TO-92(T) Q317 80002631 79PQ0997 TR PNP KTA1273-Y TO-92L/T Q317 EAA18157 79PQ0734 TR NPN 2SC1815GR TO-92(T) (T.P.S.) Q320 EAA09456 79PQ0056 TR NPN 2SC945P TO-92(T) (N.P.S.) Q320 EAA09456 79PQ0056 TR NPN 2SC945P TO-92(T) (N.P.S.) Q321 EAA18157 79PQ0734 TR NPN 2SC1815GR TO-92(T) (T.P.S.) Q321 EAA18157...
  • Page 164 FA040472 79PQ0114 CARBON 1/8W(T) 5% 4.7Kohm R129 FA040223 79PQ0096 CARBON 1/8W(T) 5% 22Kohm R130 R0319110 JUMPER WIRE AI/T 15mm R131 FA040102 79PQ0082 CARBON 1/8W(T) 5% 1Kohm R132 FB245491 79PQ2445 METAL 1/4W (T) 1%5.49Kohm R135 FB242702 79PQ1052 METAL 1/4W(T) 1% 27Kohm R136 R0319110 JUMPER WIRE AI/T 10mm...
  • Page 165 FA240113 79PQ2080 CARBON 1/4W(T) 5% 11Kohm R31F FA040331 79PQ1020 CARBON 1/8W(T) 5% 330ohm R31H FA040331 79PQ1020 CARBON 1/8W(T) 5% 330ohm R31J FB242202 79PQ1051 METAL 1/4W(T) 1% 22Kohm R31N FA040332 79PQ0321 CARBON 1/8W(T) 5% 3.3Kohm R31P FB241181 79PQ2219 METAL 1/4W(T) 1% 1.18Kohm R31Q FB242701 79PQ0336...
  • Page 166 FB242501 79PQ2221 METAL 1/4W(T) 1% 2.5Kohm R410 FB248201 79PQ1121 METAL 1/4W(T) 1% 8.2Kohm R411 FB242501 79PQ2221 METAL 1/4W(T) 1% 2.5Kohm R412 FB248201 79PQ1121 METAL 1/4W(T) 1% 8.2Kohm R413 FA330331 79PQ0150 CARBON 1/2W(T) 5% 330ohm R414 FA330229 79PQ1541 CARBON 1/2W(T) 5% 2.2ohm R417 FA040473 79PQ0115...
  • Page 167 FA040101 79PQ0081 CARBON 1/8W(T) 5% 100ohm R761 FA040101 79PQ0081 CARBON 1/8W(T) 5% 100ohm R762 FA330621 79PQ2441 CARBON 1/2W(T) 5% 620ohm R768 FA040471 79PQ0113 CARBON 1/8W(T) 5% 470ohm R771 R0319110 JUMPER WIRE AI/T 5mm VR102 R0319110 JUMPER WIRE AI/T 5mm VR103 EKA01201 79PQ0077 ZEN DIODE 1/2W(T) HZS12A2 (HITACHI) ZD102...
  • Page 168 GA310815 79PQ1658 ELECT 85oC/T 1000u/10V M C122 GAI10775 79PQ1984 ELECT 105oC/A 100u/100V M TK C138 80011091 ELECT LOW ESR 100u/100V M 10X30(10 C138 GJH102E5 79PQ0274 SAFETY Y-CAP/S 1000P/400V M C146 GJH102E5 79PQ0274 SAFETY Y-CAP/S 1000P/400V M C154 GFC622J2 79PQ1987 PLASTIC PPS/A 6200P/2KV J C318 GFB22482 79PQ0889...
  • Page 169 JD512001 79PQ0290 AC SOCKET 3P P101 12800032 HEAT SINK 40*12*50 B Q101 14000041 SCREW (P-#2CBRITS*3*8*15BF) Q101 EF202500 79PQ1248 FET N 2SK2545 TO-220F TOSHIBA Q101 80000901 79PQ0789 FET N FS7KM-12 600V/7A TO-220F Q101 80000981 79PQ0791 FET N 2SK2645-01/MR TO-220F Q101 EF211180 79PQ0315 FET N 2SK1118 TO-220F Q101...
  • Page 170 80000251 79PQ0028 TACT SW 1P 100G+-50 SW705 80000251 79PQ0028 TACT SW 1P 100G+-50 SW706 80000251 79PQ0028 TACT SW 1P 100G+-50 SW707 80011211 79PQ2206 POWER X'FM ERL35 500uH FE700+ T101 B Ver. 80000281 79PQ0030 H.DRIVE X'FM 4.5mH EI-19 T302 80000801 79PQ0311 THERMISTOR NTCR SCK054 13.3mm TH101 80005821...
  • Page 171 FOR CRT 17000981 MALAR SHEET (MIT. TUBE) FOR CRT 10102331 79PQ2642 CABINET FRONT ASSY,(MC-0807) 10102271 79PQ2643 CABINET BACK (MITSUBISHI) (PC+ABS),(MC-0807) 80016891 E75 MITSUBISHI CRT GND WIRE GND WIRE 11000991 79PQ2466 REVOLVING STAND ASSY 13400841 79PQ2484 POLYLON(B) 13400851 79PQ2485 POLYLON(T) 13700021...
  • Page 172 79PQ2424 CHASSIS BASE 15200031 79PQ0961 LABEL (REV.) 80001631 79PQ0703 POWER CORD 3P 1.8 NON-SHIELD COL POWER CORD 80016891 E75 MITSUBISHI CRT GND WIRE GND WIRE 13201871 79PQ2647 CARTON BOX DP74(A VER.) 15501101 79PQ2648 OWNERS MANUAL DP74 A VER 80015091 79PQ2285...
  • Page 173 9. BLOCK DIAGRAM HORIZONTAL AND VERTICAL KA3842 SYNC PROCESSOR SMPS TDA 4857 EH.T. H/HV SYSTEM ARCHITECTURE EW-OUT & HOUT / V.GEOMETRY MCU/E²PROM/DDC VERT OUT DYNAMIC FOCUSING TDA 8172 RGB OUT WT6232+24LC08 LM2469 DC-DC DEFLECT-STAGE CUT-OFF MOTHER BOARD I²C LM2480 RGB PREAMP CUT-OFF MTV-030 FBLK...
  • Page 174 10. SCHEMATIC DIAGRAM (FE770/FE770M/FE771SB/DPlus 74SB) 10-1...
  • Page 175 MODEL FE771SB/Dplus74SB FE770/FE770M FE770/FE770M MITSUBISHI SAMSUNG M41LRY61X22 M41QEE903X03 M41QCJ761X172 (DFX) R30H 750k 1/4W 750k 1/4W R30J 750k 1/4W 750k 1/4W R319 150k 120k R31L 51k 1/4W 1/4W 51k 1/4W 1/4W R31T 390k 1/4W 1% 169k 1/4W 1% 133k 1/4W 1% R344 27.4k 1/4W 1%...
  • Page 176 SCHEMATIC DIAGRAM (FE770/FE770M/FE771SB/DPlus74SB) 10-3...