Daewoo 720D Service Manual Download Page 28 | Manualshive

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Summary of Contents for 720D

Page 1: ...DAEWOO ELECTRONICS CO LTD http svc dwe co kr Service Manual XGA COLOR MONITOR Model 720D 905D 905DS 905DF January 2001...

Page 2: ...6 GENERAL INFORMATION 7 PIN CONNECTOR 8 CAUTIONS FOR ADJUSTMENT AND REPAIR 8 OPERATION AND ADJUSTMENT 9 ALIGNMENT PROCEDURE 13 TROUBLESHOOTING HINTS 15 BLOCK DIAGRAM 30 PCB LAYOUT 31 SCHEMATIC DIAGRA...

Page 3: ...ntial that these critical parts should be replaced with manufacturer s specified parts to prevent X Ray shock fire or other hazards Do not modify the original design without getting written permission...

Page 4: ...ult 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 Statement...

Page 5: ...o the contacts with a pipe cleaner cotton tipped stick or comparable nonabrasive applicator 10 by volume Aceton and 90 by volume isopropyl alchohol 90 99 strength 6 Do not damage any plug socket B vol...

Page 6: ...S devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads...

Page 7: ...uit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush lt is not necessary to reapply acrylic coating to the area...

Page 8: ...nization Horizontal 30 95 KHz Vertical 50 160 Hz Plug and Play DDC1 2B CI Power Saving EPA VESA DPMS Nutek Compliant Power Source 100 240 Vac 50 60Hz Free Voltage Power Consumption 80 W 90 W Dimension...

Page 9: ...VGA VESA and XGA and Apple Macintosh Video Card And so this color monitor has a maximum horizontal resolution of 1600 dots and a maximum vertical resolution of 1200 lines for superior clarity of displ...

Page 10: ...only electrical specification or function Reform the leadwire after any repair work Caution For Servicing In case of servicing or replacing CRT high voltage sometimes remains in the anode of the CRT C...

Page 11: ...function Move cursor to the left window on the OSD window Decrease the value of any selected function Launch OSD On Screen Display MENU window Move cursor to the high window on the OSD window Increase...

Page 12: ...10 Key Process OSD OFF MENU MENU MENU MENU When you choose the icon on the OSD window you can exit the OSD screen Hot Key BRIGHTNESS CONTRAST...

Page 13: ...CENTER Choose different preset color temperatures or set your own customized color parameters Adjust the red gain Adjust the green gain Adjust the blue gain COLOR TEMP RED GAIN GREEN GAIN BLUE GAIN A...

Page 14: ...rds left or right PIN BALANCE TRAPEZOID Adjust the pin corner bottom when the bottom sides of the screen are bowed B PIN CORNER Degauss the display and restore image quality DEGAUSS Reset the screen t...

Page 15: ...ic Focus VR to obtain best V Focus e If the H V Focus is not satisfactory readjust the Static Dynamic Focus 4 White Balance Adjustment a Select 9300 K on the OSD Menu b Receive a full white pattern of...

Page 16: ...the angles between the two tabs of the 4 pole magnets d Horizontal red and blue lines are converged by varying the tabs together and keeping the angle between them constant e Apply a yellow cross hatc...

Page 17: ...15 TROUBLESHOOTING HINTS 1 No Character...

Page 18: ...16 2 No Raster...

Page 19: ...17 3 A missing Color...

Page 20: ...18 4 Abnormal OSD Font...

Page 21: ...19 5 Horizontal Output Circuit MODE SCAN B VGA 31 5KHz 43V 43KHz 60V 68KHz 97V 79KHz 112V 91KHz 127V...

Page 22: ...20 6 Unstable Picture 6 1 Horizontal...

Page 23: ...21 6 2 V OSC Deflection Circuit...

Page 24: ...22 7 Focus...

Page 25: ...23 7 1 Dynamic Focus FvH Fvv 720D 300V 140V 905D 320V 180V 905DS 400V 200V 905DF 350V 170V...

Page 26: ...24 8 Convergence...

Page 27: ...25 9 Abnormal Picture 9 1 Horizontal Size At first adjust controls in the OSD Menu MODE Scan B VGA 43V 43KHz 60V 68KHz 97V 79KHz 112V 91KHz 127V The B are as follows...

Page 28: ...26 9 2 Vertical Size...

Page 29: ...27 10 High Voltage Output Circuit...

Page 30: ...28 11 Power Supply Unit P S U Replace R025...

Page 31: ...29...

Page 32: ...LIPS Geometrical Compensatio H Driver Drive Transformer H V Moire Cancellation USB PORT 1 Up Stream 4 Down Stream AC INPUT SMPS Transformer H Def Output TR Damper C S Switching 2SC5411 DD54RC TOSHIBA...

Page 33: ...31 PCB LAYOUT 720D 905D 905S 905DF Main PCB Component Side...

Page 34: ...32 720D 905D 905S 905DF Main PCB Solder Side...

Page 35: ...33 720D 905D 905S 905DF CRT PCB Component Side 720D 905D 905S 905DF CRT PCB Solder Side...

Page 36: ...34 905D 905DS Control PCB Component Side 905D 905DS Control PCB Solder Side...

Page 37: ...35 905DF Control PCB Component Side 905DF Control PCB Solder Side...

Page 38: ...36 SCHEMATIC DIAGRAM Power or Connection Section...

Page 39: ...37 Control Vertical Section...

Page 40: ...38 Deflection Hige Voltage Section...

Page 41: ...39 Video Section...

Page 42: ...40 EXPLODED VIEW MECHANICAL PARTS LIST 720D...

Page 43: ...905D 41...

Page 44: ...42 905DS...

Page 45: ...43 905DF...

Page 46: ...25pF D 0 5 F 1pF J 5 K 10 P 100 0 Z 80 Fig Part No Description Index R101 Resistors RD 4Z820J Carbon 82J R102 RD 4Z201J Carbon1 4W 200J Allowance F 1 J 5 K 10 M 20 G 2 INFORMATION OF PART DESCRIPTION...

Page 47: ...SS 220MF 8X11 5 TP C106 CEXF1E101V C ELECTRO 25V RSS 100MF 6 3X11 TP C107 CEXF1E102V C ELECTRO 25V RSS 1000MF 13X20 BK C108 CEXF1E102V C ELECTRO 25V RSS 1000MF 13X20 BK C109 CEXF1C101V C ELECTRO 16V R...

Page 48: ...CCXB1H101K C CERA 50V B 100PF K TAPPING C506 CCXB1H101K C CERA 50V B 100PF K TAPPING C507 CMXM2A562J C MYLAR 100V 5600PF J TP C508 CMXM2A103G C MYLAR 100V 0 01MF G TP C509 CMXM2A104J C MYLAR 100V 0 1M...

Page 49: ...F 0 1MF Z C606 CMXM2A104J C MYLAR 100V 0 1MF J TP C610 CMXF2D474J C MYLAR MPP 200V 0 47MF J C612 CMXM2A104J C MYLAR 100V 0 1MF J TP C801 CCXB1H472K C CERA 50V B 4700PF K TAPPING C803 CEXF2E109V C ELE...

Page 50: ...ONN AS SMH200 08 YBNH200 09 500 CA701 9970740037 CONN AS YMH250 4 1007 24 250 905D 905DS 905DF only CG01 9970710246 CRT GND AS 0 16 3 16 BL102NG 740 905D 905DF only CS803 9979300007 SOCKET CRT ISDS08S...

Page 51: ...FMLG22S DIODE FML G22S D534 DDD54RC DIODE DAMPER DD54RC D536 DUF4007 DIODE UF4007 D537 DRP1H DIODE RP1H D538 DS2L60 R DIODE S2L60 D581 DZN4148 DIODE 1N4148 AUTO 52MM D591 D1N4937GP DIODE 1N4937GP TAPP...

Page 52: ...DBL358 DUAL OP AMP IC801 1LM1253N IC VIDEO PRE AMP LM1253N J292 RD 4Z100J R CARBON FILM 1 4 10 OHM J J322 RD 2Z399J R CARBON FILM 1 2 3 9 OHM J J330 RD 4Z479J R CARBON FILM 1 4 4 7 OHM J J389 RD 4Z479...

Page 53: ...SR1006 AUTO Q557 TZSR1006 TR KSR1006 AUTO Q558 TZSR1006 TR KSR1006 AUTO Q559 TZSR1006 TR KSR1006 AUTO Q560 TZSR1006 TR KSR1006 AUTO Q561 TZTA1266Y TR KTA1266Y AUTO 1015Y Q562 TZTC3198Y TR KTC3198Y 181...

Page 54: ...HM J R133 RD AZ102J R CARBON FILM 1 6 1K OHM J R211 RD AZ622J R CARBON FILM 1 6 6 2K OHM J R212 RD AZ822J R CARBON FILM 1 6 8 2K OHM J R272 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R301 RD AZ101J R CARB...

Page 55: ...M J 720D 905D only R414 RD 2Z279J R CARBON FILM 1 2 2 7 OHM J 905DF only R416 RD AZ682J R CARBON FILM 1 6 6 8K OHM J R417 RD AZ562J R CARBON FILM 1 6 5 6K OHM J R418 RD AZ682J R CARBON FILM 1 6 6 8K O...

Page 56: ...544 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R545 RS02Z200J R M OXIDE FILM 2W 20 OHM J TAPPING R546 RS01Z221J R M OXIDE FILM 1W 220 OHM J TAPPING R548 RD AZ122J R CARBON FILM 1 6 1 2K OHM J R549 RD 4Z22...

Page 57: ...J R601 RD AZ103J R CARBON FILM 1 6 10K OHM J R602 RD AZ513J R CARBON FILM 1 6 51K OHM J R606 RD 4Z822J R CARBON FILM 1 4 8 2K OHM J R607 RD AZ393J R CARBON FILM 1 6 39K OHM J R608 RD AZ101J R CARBON F...

Page 58: ...BER WSP 201M SG890 DWSP301M SURGE ABSORBER WSP 301M SW701 5S50101Z01 SW TACT KPT 1115VM 1C 1P 720Donly SW701 5S50101Z10 SW TACT KPT 1115AM 905D 905DS 905DF only SW702 5S50101Z01 SW TACT KPT 1115VM 1C...

Page 59: ...DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail djkoo web dwe co kr TEL 82 2 360 7806 FAX 82 2 360 7877...

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