Related Manuals for Daewoo 720D
Summary of Contents for Daewoo 720D
- Page 1 All manuals and user guides at all-guides.com Service Manual XGA COLOR MONITOR Model : 720D 905D 905DS 905DF DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr January, 2001...
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Page 2: Table Of Contents
All manuals and user guides at all-guides.com 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
X-Ray, shock, fire or other hazards. Do not modify the original design without getting written permission from DAEWOO ELECTRONICS CO. or this will void the original parts and labor warranty. X-Ray WARNING: The only potential source of X-Ray is the picture tube. -
Page 4: General Safety Information
All manuals and user guides at all-guides.com 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. -
Page 5: Servicing Precautions
All manuals and user guides at all-guides.com 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. - Page 6 All manuals and user guides at all-guides.com 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”...
- Page 7 All manuals and user guides at all-guides.com 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
4. Securely crimp each connection and solder it. 5. Inspect the solder joints of the two “original” leads on the circuit board copper side. If they are not shiny, reheat them and apply additional solder if necessary. TECHNICAL INFORMATION Model Names 720D 905D CDT Size 17-inch 19-inch Diagonal visible image area 16.2-inch... -
Page 9: General Information
All manuals and user guides at all-guides.com GENERAL INFORMATION This color monitor automatically scans all horizontal frequencies from 30KHz to 95Hz, and all vertical frequencies from 50Hz to 160Hz. This color monitor adopted the OSD (On Screen Display), it shows the sync polarity and frequency and it provides that easily adjust control. -
Page 10: Pin Connector
All manuals and user guides at all-guides.com 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
All manuals and user guides at all-guides.com OPERATION & 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. •... - Page 12 All manuals and user guides at all-guides.com Key Process MENU MENU MENU MENU OSD OFF • When you choose the icon on the OSD window, you can exit the OSD screen. Hot Key BRIGHTNESS CONTRAST...
- Page 13 All manuals and user guides at all-guides.com 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 COLOR TEMP parameters.
- Page 14 All manuals and user guides at all-guides.com 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 PIN BALANCE right.
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Page 15: Alignment Procedure
All manuals and user guides at all-guides.com ALIGNMENT PROCEDURE Standard Adjustment Conditions 1. Power source voltage : AC 100 - 240Vac, 50/60Hz. 2. Aging : Take at least 15 minutes warm-up time. 3. Signals. Video : Analog 0.7Vpp 75Ω terminal positive polarity Synchronizing : Composite H+V Sync : 1.0Vpp ~ 5.0Vpp (Positive / Negative) Separate H, V Sync : TTL Level (Positive / Negative) Deflection frequency... - Page 16 All manuals and user guides at all-guides.com 5. 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. Also adjust the brightness to the desired condition. (c) Vertical red and blue lines are converged by varying the angles between the two tabs of the 4-pole magnets.
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Page 17: Troubleshooting Hints
All manuals and user guides at all-guides.com TROUBLESHOOTING HINTS 1. No Character... - Page 18 All manuals and user guides at all-guides.com 2. No Raster...
- Page 19 All manuals and user guides at all-guides.com 3. A missing Color...
- Page 20 All manuals and user guides at all-guides.com 4. Abnormal OSD Font...
- Page 21 All manuals and user guides at all-guides.com 5. Horizontal Output Circuit MODE SCAN B+ VGA (31.5KHz) 43KHz 68KHz 79KHz 112V 91KHz 127V...
- Page 22 All manuals and user guides at all-guides.com 6. Unstable Picture 6-1. Horizontal...
- Page 23 All manuals and user guides at all-guides.com 6-2. V.OSC/Deflection Circuit...
- Page 24 All manuals and user guides at all-guides.com 7. Focus...
- Page 25 All manuals and user guides at all-guides.com 7-1. Dynamic Focus 720D : 300V 140V 905D : 320V 180V 905DS : 400V 200V 905DF : 350V 170V...
- Page 26 All manuals and user guides at all-guides.com 8. Convergence...
- Page 27 All manuals and user guides at all-guides.com 9. Abnormal Picture 9-1. Horizontal Size * At first, adjust controls in the OSD Menu The B+ are as follows: MODE Scan B+ 43KHz 68KHz 79KHz 112V 91KHz 127V...
- Page 28 All manuals and user guides at all-guides.com 9-2. Vertical Size...
- Page 29 All manuals and user guides at all-guides.com 10. High Voltage Output Circuit Ω ∞...
- Page 30 All manuals and user guides at all-guides.com 11. Power Supply Unit (P.S.U) Replace R025...
- Page 31 All manuals and user guides at all-guides.com...
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Page 32: Block Diagram
All manuals and user guides at all-guides.com BLOCK DIAGRAM... -
Page 33: Pcb Layout
All manuals and user guides at all-guides.com PCB LAYOUT 720D/905D/905S/905DF Main PCB Component Side... - Page 34 All manuals and user guides at all-guides.com 720D/905D/905S/905DF Main PCB Solder Side...
- Page 35 All manuals and user guides at all-guides.com 720D/905D/905S/905DF CRT PCB Component Side 720D/905D/905S/905DF CRT PCB Solder Side...
- Page 36 All manuals and user guides at all-guides.com 905D/905DS Control PCB Component Side 905D/905DS Control PCB Solder Side...
- Page 37 All manuals and user guides at all-guides.com 905DF Control PCB Component Side 905DF Control PCB Solder Side...
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Page 38: Schematic Diagram
All manuals and user guides at all-guides.com SCHEMATIC DIAGRAM Power or Connection Section... - Page 39 All manuals and user guides at all-guides.com Control & Vertical Section...
- Page 40 All manuals and user guides at all-guides.com Deflection & Hige Voltage Section...
- Page 41 All manuals and user guides at all-guides.com Video Section...
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Page 42: Exploded View & Mechanical Parts List
All manuals and user guides at all-guides.com EXPLODED VIEW & MECHANICAL PARTS LIST 720D... - Page 43 All manuals and user guides at all-guides.com 905D...
- Page 44 All manuals and user guides at all-guides.com 905DS...
- Page 45 All manuals and user guides at all-guides.com 905DF...
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Page 46: Information Of Part Description
All manuals and user guides at all-guides.com 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 ±... -
Page 47: Electrical Parts List
These should be replaced only with the types specified in the parts list. PART-CODE PART-NAME PART-DESC NOTE 00020 W3475N731- CORD POWER 3 H05VV-F 3X0.75 1.8 IV 00160 5M20000003 COIL TILT TC-17B-1 720D only B002 5PB13857-- COIL BEAD BI3857(AXIAL) B301 5PB13857-- COIL BEAD BI3857(AXIAL) B502 5PB13857-- COIL BEAD BI3857(AXIAL) - Page 48 BUP 3KV 2200PF J C542 CMXH3L222J C MYLAR BUP 3KV 2200PF J C543 CCXB3A102K C CERA 1KV B 1000PF K (TAPPING) 720D only C543 CCXB3A152K C CERA 1KV HIKB 1500PF K 905D,905DF only C543 CCXB3A222K C CERA HIKB 1KV 2200PF K...
- Page 49 HIKE 2KV 0.01MF P C565 CMXF2G104J C MYLAR MPP 400V 0.1MF J 905DS,905DF only C565 CMXF2G124J C MYLAR MPP 400V 0.12MF J 720D,905D only C566 CMXF2G124J C MYLAR MPP 400V 0.12MF J C571 CCXF1H104Z C CERA 50V F 0.1MF Z C577...
- Page 50 905D,905DF only CS803 9979300007 SOCKET CRT ISDS08S CT002 9970710246 CRT GND AS 0.16*3*16+BL102NG=740 905DS only CT002 9970710251 CRT GND AS 0.16*3*16+BL102NG=730 720D only CT802 9979617042 M41KXU200XX061 (0.26) 720D only CT802 9979619007 M46QCE261X112(T4) 905D only CT802 9979619008 M46QCY261X112(SHORT) 905DS only CT802 9979619011...
- Page 51 1N4148 AUTO 52MM D865 DZN4148--- DIODE 1N4148 AUTO 52MM D891 DBAV20---- DIODE BAV20 DG001 5MG0000069 COIL DEGAUSSING DG-905D 905D only DG001 5MG0000069 COIL DEGAUSSING DG-905D 905DF only DP001 5MG0000064 COIL DEGAUSSING DG-712D 720D only DP001 5MG0000069 COIL DEGAUSSING DG-905D 905DS only...
- Page 52 1/2 3.9 OHM J J330 RD-4Z479J- R CARBON FILM 1/4 4.7 OHM J J389 RD-4Z479J- R CARBON FILM 1/4 4.7 OHM J 720D only J389 RD-AZ479J- R CARBON FILM 1/6 4.7 OHM J 905D,905DS,905DF only J556 RD-4Z100J- R CARBON FILM...
- Page 53 All manuals and user guides at all-guides.com PART-CODE PART-NAME PART-DESC NOTE Q011A TSPP04N60S SPP04N60S5 Q100 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q104 TZTC3207-- KTC3207 (AUTO) Q105 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q301 TZSR1006-- KSR1006 (AUTO) Q303 TZSR1006-- KSR1006 (AUTO) Q304 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q361 TZTC3202Y- KTC3202Y (AUTO)(1959Y) Q362 TZTA1270Y-...
- Page 54 All manuals and user guides at all-guides.com PART-CODE PART-NAME PART-DESC NOTE R022 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R023 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R025 RW01Z128JN R WIRE WOUND 1W 0.12 OHM J NON-INDUCT R026 RX05V122J- R CEMENT 5W 1.2K OHM J VERTICAL...
- Page 55 R414 RD-2Z229J- R CARBON FILM 1/2 2.2 OHM J 905DS only R414 RD-2Z249J- R CARBON FILM 1/2 2.4 OHM 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...
- Page 56 R528 RD-AZ153J- R CARBON FILM 1/6 15K OHM J 905DF only R528 RD-AZ393J- R CARBON FILM 1/6 39K OHM J 720D,905D,905DS only R530 RD-AZ244J- R CARBON FILM 1/6 240K OHM J R531 RS02Z201J- R M-OXIDE FILM 2W 200 OHM J...
- Page 57 All manuals and user guides at all-guides.com PART-CODE PART-NAME PART-DESC NOTE R572 RD-AZ151J- R CARBON FILM 1/6 150 OHM J R573 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R574 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R576 RD-4Z304J- R CARBON FILM 1/4 300K OHM J R578...
- Page 58 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-1P 720D only SW702 5S50101Z10 SW TACT KPT-1115AM 905D,905DS,905DF only SW703 5S50101Z01 SW TACT KPT-1115VM 1C-1P 720D only SW703 5S50101Z10 SW TACT...
- Page 59 All manuals and user guides at all-guides.com 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...