Related Manuals for DAEWOO ELECTRONICS 712D
Summary of Contents for DAEWOO ELECTRONICS 712D
- Page 1 Service Manual XGA COLOR MONITOR Model : 712D DAEWOO ELECTRONICS CO., LTD OVERSEAS SERVICE DEPT.
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Page 2: Table Of Contents
CONTENTS SAFETY PRECAUTIONS GENERAL SAFETY INFORMATION SERVICING PRECAUTIONS TECHNICAL INFORMATION GENERAL INFORMATION PIN CONNECTOR CAUTIONS FOR ADJUSTMENT AND REPAIR OPERATION AND ADJUSTMENT ALIGNMENT PROCEDURE TROUBLESHOOTING HINTS BLOCK DIAGRAM PCB LAYOUT SCHEMATIC DIAGRAM EXPLODED VIEW & MECHANICAL PARTS LIST INFORMATION OF PART DESCRIPTION ELECTRICAL PARTS LIST... -
Page 3: Safety Precautions
SAFETY PRECAUTIONS CAUTION: No modifications of any circuits should be attempted. Service work should be performed only after you are thoroughly familiar with all of the following safety checks and servicing guidelines. Safety Check Care should be taken while servicing this analog color display because of the high voltages used in the deflection circuits. These voltages are exposed in such areas as the associated flyback and yoke circuits. -
Page 4: General Safety Information
GENERAL SAFETY INFORMATION Terms in the manual CAUTION Statements identify conditions or practices that could result in damage to the equipment or other property. WARNING Statements identify conditions or practices that could result in personal injury or loss of life. Terms as marked on equipment CAUTION Statements indicate a personal injury hazard not immediately accessible as one reads the... -
Page 5: Servicing Precautions
SERVICING PRECAUTIONS CAUTION: Before servicing instruments covered by this service manual, its supplements, and addendum, please read and follow the SAFETY PRECAUTIONS of this manual. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 1 of this manual, always follow the safety precautions. Remember: Safety First. - Page 6 Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components are commonly called Electrostatically Sensitive (ES) Devices. The typical examples of ES devices are integrated circuits, some field-effect transistors, and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.
- Page 7 FIGURE 1. USE SOLDERING IRON TO PRY LEADS IC Removal/Replacement Some utilized chassis circuit boards have slotted (oblong) holes through which the IC leads are inserted and then bent flat against the circuit foil. When holes are slotted, the following technique should be used to remove and replace the IC.
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Page 8: Technical Information
Power IC, Transistor or Devices Removal/Replacement 1. Heat and remove all solders from the device leads. 2. Remove the heatsink mounting screw (if applicable). 3. Carefully remove the device from the circuit board. 4. Insert new device in circuit board. 5. -
Page 9: General Information
GENERAL INFORMATION This color monitor automatically scans all horizontal frequencies from 30KHz to 95KHz, and all vertical frequencies from 50Hz to 160Hz. This color monitor supports IBM PC, PC/XT, PC/AT, personal System/2 (PS/2), Apple Macintosh, and compatible users crisp text and vivid color graphics display when using the following graphics adapters : (VGA, 8514/A, Super VGA, VESA and XGA and Apple Macintosh Video Card). -
Page 10: Pin Connector
PIN CONNECTOR Signal Green Blue GND - Red GND - Green GND - Blue +5Vdc Arrangement of 15-pin D-sub connector GND - H.Sync GND - V.Sync Bi-directional Data (SDA) Horizontal Sync Vertical Sync (VCLK) Data Clock (SCL) CAUTIONS FOR ADJUSTMENT AND REPAIR •... -
Page 11: Operation And Adjustment
OPERATION AND ADJUSTMENT Control Panel • Move cursor to the right window on the OSD window. • Increase the value of any selected function. • Move cursor to the left window on the OSD window. • Decrease the value of any selected function. •... -
Page 12: Hot Key
Key Process ENGL SH DEUTSCH ESPAÑOL FRANCA S TAL ANO MENU Start • When you choose the icon on the OSD window, you can exit the OSD screen. Hot Key BRIGHTNESS CONTRAST... -
Page 13: Osd Functions
OSD Functions ICON CONTROL FUNCTIONS Select language for OSD (5 languages). LANGUAGE H. CENTER & Adjust the position of the display horizontally(left or right) and vertically (up or down) V. CENTER Choose different preset color temperatures or set your own customized color parameters. COLOR TEMP Adjust the red gain. - Page 14 ICON CONTROL FUNCTIONS Adjust the left and right margins for more convex or more concave margins. PINCUSHION Adjust the trapezoid of the screen by moving the lines inward or outward. TRAPEZOID Adjust the side balance when the sides of the screen are bowed towards left or right. PIN BALANCE Adjust the parallelogram when the screen is leaning left or right.
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Page 15: Alignment Procedure
ALIGNMENT PROCEDURE Standard Adjustment Conditions 1. Power source voltage : AC 100 - 240Vac, 50/60Hz. 2. Aging : Take at least 20 minutes warm-up time. 3. Signals. Video : Analog 0.7Vpp 75W terminal positive polarity Synchronizing : TTL Level Negative/Positive Separate Deflection frequency Horizontal Frequency : 30KHz - 94KHz Vertical Frequency : 50Hz - 120Hz... - Page 16 (k) Select 6550°K on the OSD Menu and set the color coordinates in x=0.313, y=0.329 at the maximum contrast control and center brightness control (l) Check if a full white pattern is over 30Ft/L. 6. Static Convergence Adjustment (a) Apply a magenta cross hatch pattern on display. (b) Adjust the focus from the best over all focus on the display.
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Page 17: Troubleshooting Hints
TROUBLESHOOTING HINTS 1. No Character... - Page 18 2. No Raster...
- Page 19 3. A Missing Color...
- Page 20 4. Abnormal OSD Font...
- Page 21 5. Horizontal Output Circuit MODE P6 Voltage VGA (31.5KHz) S.VGA (37.8KHz) XGA 46K CAD 68K 109V 81KHz 129V 93KHz 144V...
- Page 22 6. Unstable Picture 6-1. Horizontal...
- Page 23 6-2. Vertical...
- Page 24 7. Focus...
- Page 25 7-1. Dynamic Focus...
- Page 26 8. Convergence...
- Page 27 9. Abnormal Picture * At first, adjust controls in the OSD Menu 9-1. Horizontal Size * The B+ are as follows: MODE Scan B+ S.VGA XGA 46K CAD 68K 109V 129V 144V...
- Page 28 9-2. Vertical Size...
- Page 29 10. High Voltage Output Circuit Test mode: 91KHz...
- Page 30 11. Side-Pincushion Circuit...
- Page 31 12. Power Supply Unit (P.S.U)
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Page 33: Block Diagram
BLOCK DIAGRAM... -
Page 34: Pcb Layout
PCB LAYOUT Main PCB Component Side... - Page 35 Main PCB Solder Side...
- Page 36 CRT PCB Component Side...
- Page 37 CRT PCB Solder Side...
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Page 38: Schematic Diagram
SCHEMATIC DIAGRAM Deflection Section... - Page 40 Video Section...
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Page 41: Exploded View & Mechanical Parts List
EXPLODED VIEW & MECHANICAL PARTS LIST... -
Page 42: Information Of Part Description
INFORMATION OF PART DESCRIPTION Important Safety Notice Components identified with the International Symbol have special characteristics important for safety. When replacing any components, use only manufacturer’s specified parts. Abbreviation of Description RESISTOR Description Allowance ± 1% ± 5% ± 10% ±... -
Page 43: Electrical Parts List
ELECTRICAL PARTS LIST ! have special characteristics important for safety and x-ray radiation. The components identified by mark These should be replaced only with the types specified in the parts list. PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC 00010 9979800482 PCB VIDEO T=1.6*155*123 C190 CEXF2E100V C ELECTRO... - Page 44 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC C509 CCXF1H104Z C CERA 50V F 0.1MF Z C806 CEXD2A109F C ELECTRO 100V RND 1MF(5*11) TP C510 CEXF1C102V C ELECTRO 16V RSS 1000MF (10X20) TP C807 HCFK103ZCA C CHIP CERA 50V Y5V 0.01MF Z 2012 C511 CEXF1H330V C ELECTRO 50V RSS 33MF (6.3X11) TP...
- Page 45 DIODE FDH400 D166 DERD07-15- DIODE ERD07-15 D865 DFDH400--- DIODE FDH400 D167 DS2L60---R DIODE S2L60 DP001 5MG0000064 COIL DEGAUSSING DG-712D D168 DS2L60---R DIODE S2L60 DZ021 DDZ15BM--- DIODE ZENER DZ15BM D169 DZN4148--- DIODE 1N4148 AUTO 52MM DZ024 DDZ3R6B--- DIODE ZENER DZ3.6B D189...
- Page 46 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC IC601 1DBL358--- DBL358 DUAL OP-AMP Q541 TZTC3198Y- TR KTC3198Y-(1815Y) (AUTO) IC801 1M52743BSP IC VIDEO PREAMP M52743BSP Q542 TZTC3198Y- TR KTC3198Y-(1815Y) (AUTO) IC802 1LM2402T-- IC VIDEO OUTPUT LM2402T Q543 TZTA1270Y- TR KTA1270Y(AUTO)(562Y) IC803 1DW0SD06-- IC OSD MTV021 Q544 TZTC3198Y- TR...
- Page 47 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R139 RS01Z100J- R M-OXIDE FILM 1W 10 OHM J (TAPPING) R246 RD-4Z683J- R CARBON FILM 1/4 68K OHM J R141 RD-4Z224J- R CARBON FILM 1/4 220K OHM J R247 RD-2Z203JS R CARBON FILM 1/2 20K OHM J SMALL R142 RD-2Z563JS R CARBON FILM...
- Page 48 PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R406 RW02Z249JN R WIRE WOUND 2W 2.4 OHM J NON-INDUCT R554 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R407 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R555 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R408 RD-AZ432J- R CARBON FILM...
- Page 49 1/6 100 OHM J T501 5RD0000048 TRANS DRIVE DDT-712D R856 RD-AZ221J- R CARBON FILM 1/6 220 OHM J T503 5MH0000068 COIL H-LINEARITY TRL-712D R857 HRFT122JCA R CHIP 1/10 1.2K OHM J 2012 T504 5RH0000114 FBT 6174Z-1018B R858 HRFT681JCA R CHIP...
- Page 50 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPOGU, SEOUL, KOREA. C.P.O. BOX 8003 SEOUL KOREA TELEX: DWELEC K28177-8 CABLE: "DAEWOOELEC" FAX: 02) 590-6291 TEL: 02) 360-7114/590-6151~5 http://www.dwe.daewoo.co.kr PRINTED DATE: AUGUST.1999...