Related Manuals for DAEWOO ELECTRONICS 719B
Summary of Contents for DAEWOO ELECTRONICS 719B
- Page 1 All manuals and user guides at all-guides.com Service Manual XGA COLOR MONITOR Model : 719B 719BF DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr February, 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 719B 719BF CDT Size 17-inch 17-inch DynaFlat 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 70KHz, 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
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 AND ADJUSTMENT 719B 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 719BF 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 13 All manuals and user guides at all-guides.com 719B 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 14 All manuals and user guides at all-guides.com 719BF Key Process OSD OFF • When you choose the icon on the OSD window, you can exit the OSD screen. Hot Key BRIGHTNESS CONTRAST...
- Page 15 All manuals and user guides at all-guides.com OSD Functions ICON CONTROL FUNCTIONS Adjust the left and right margins for more convex or more concave margins. PINCUSHION TRAPEZOID Adjust the trapezoid of the screen by moving the lines inward or outward. Adjust the parallelogram when the screen is leaning left or right.
- Page 16 All manuals and user guides at all-guides.com ICON CONTROL FUNCTIONS Display horizontal & vertical frequency and polarity. STATUS Adjust the horizontal picture moire cancellation. H. MOIRE Adjust the vertical picture moire cancellation. V. MOIRE Select language for OSD (5 languages). LANGUAGE Reset the screen to the Factory Preset Display Settings.
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Page 17: Alignment Procedure
All manuals and user guides at all-guides.com ALIGNMENT PROCEDURE Standard Adjustment Conditions 1. Power source voltage : AC 120V, 60Hz/AC 220V, 50Hz. 2. Aging : Take at least 20 minutes warm-up time. 3. Signals. Video : Analog 0.7Vpp 75Ω terminal positive polarity Synchronizing : TTL Level Negative/Positive Separate/Composite Deflection frequency Horizontal Frequency : 30KHz - 70KHz... - Page 18 All manuals and user guides at all-guides.com (h) Select the R, G, B gain on the OSD menu and adjust the key to get the color coordinates in X=0.281±0.02, Y=0.311±0.02. (i) Adjust the sub contrast control to get the screen luminosity to 32Ft/L. 6.
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Page 19: Troubleshooting Hints
All manuals and user guides at all-guides.com TROUBLESHOOTING HINTS 1. No Character No Character Are the Change the Contrast & Contrast & Brightness control to Brightness Controls maximum maximum Is whole Refer to No Raster screen bright? No Raster Is CRT Check the peripheral circuit Cathode (Rk, Gk, Bk) of CRT Board... - Page 20 All manuals and user guides at all-guides.com 2. No Raster No Raster Is Heater Is CRT Trouble in Voltage (CRT PWB) heater red-hot? about 6V? Turn the Brightness Trouble in Refer to trouble in power supply & Contrast control power supply unit. to set Maximum circuit Is whole...
- Page 21 All manuals and user guides at all-guides.com 3. A Missing Color One color is missing Check video signal Is input signal cable or video card. normal? 0.7Vpp Is the output of pre-amp Trouble in IC801 or its (IC801, TDA9210) ambient circuit pin 16,18, 20 all normal? Is video...
- Page 22 All manuals and user guides at all-guides.com 4. Abnormal OSD Font Abnormal OSD Font * If menu key selected. Is menu Trouble in Is +5V key selected? +5V voltage Voltage about 5V? Is OSD Font line. exist? Refer to trouble in P.S.U One color is Troubie in missing...
- Page 23 All manuals and user guides at all-guides.com 5. Horizontal Output Circuit Trouble in Horizontal output circuit (No Raster Is the Trouble in B+ Booster Circuit B+line voltage (Check the B+section of IC501) over 45V? Is the H-out waveform of IC501 Trouble in IC501 normal? Is the Collector...
- Page 24 All manuals and user guides at all-guides.com 6. Unstable Picture 6-1. Horizontal Unstable picture Is H.Sync Check H.Sync Out of input pin of IC501 Micom or its ambient correct? circuits. Is the Check the value of pin 10 of IC501 C513, R522 12V? Trouble in IC501...
- Page 25 All manuals and user guides at all-guides.com 6-2. Vertical Unstable or Abnormal picture Check PWR 13V DC line ambient circuit. correct? the output 45Vp-p Check V.DY waveform of IC401 and ambient circuit. (pin 6) normal? Is the output pulse Check the IC401 of IC501 (pin 23) or ambient circuit.
- Page 26 All manuals and user guides at all-guides.com 7. Focus Monitor remains unfocused Check Focus VR in focus acceptable? Trouble in Focus circuit (FBT)
- Page 27 All manuals and user guides at all-guides.com 7-1. Dynamic Focus * Check after adjusting the static focus Focus is poor ORION : 300V 120V finely by VR in FBT SAMSUNG : 300V 120V waveform Is the 1. Check the CRT socket waveform of the or connector wire DF pin in FBT...
- Page 28 All manuals and user guides at all-guides.com 8. Convergence Poor convergence convergence Adjust static on the center area convergence bad? Refer to Adjustment procedure of convergence convergence on the Adjust D.Y fringe area bad? Location...
- Page 29 All manuals and user guides at all-guides.com 9. Abnormal Picture 9-1. Horizontal Size Abnormal H.Size When the H.Size on the Check pin 11 of IC501 OSD is changed, is the and its ambient circuit H.size changed? It isn’t out of order.
- Page 30 All manuals and user guides at all-guides.com 9-2. Vertical Size Abnormal V.Size Check the IC401 changeable the the 3.5Vdc of pin DC voltage of and its 23 of the IC501? IC401 pin 6? ambient circuit Check the pin 23 of IC501 Trouble V.OSC/ and its ambient circuit Deflection Circuit...
- Page 31 All manuals and user guides at all-guides.com 10. High Voltage Output Circuit Trouble in H.V circuit (No Raster) Trouble in power B+(45V) line supply circuit voltage normal? Is Q505 Trouble in FBT collector waveform normal? Is IC501 Trouble in IC501 pin 8 ambient circuit normal?
- Page 32 All manuals and user guides at all-guides.com 11. Side-Pincushion Circuit Side-Pincusion distortion is excessive or barrel Select the side-pincushion icon on OSD menu, and adjust acceptable position. Is the pin 5,10 Check IC803 or waveform of IC803 their ambient circuit correct? Is the Check IC803or...
- Page 33 All manuals and user guides at all-guides.com 12. Power Supply Unit (P.S.U) Trouble in P.S.U power switch Switch on Check the power cord outlet fuse F001 and diode D001, D002, O.K? D003, D004, Q001 Trouble in D001, D002, voltage of T001 D003, D004, C004 and pin 7 130V TH001.
- Page 34 All manuals and user guides at all-guides.com Is voltage Trouble in D106 or of C109 13Vdc? horizontal part Trouble in D104 or voltage of C108 vertical part -13Vdc? Is voltage of C106 Trouble in D108 27Vdc? P.S.U O.K...
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Page 35: Block Diagram
All manuals and user guides at all-guides.com BLOCK DIAGRAM... -
Page 36: Pcb Layout
All manuals and user guides at all-guides.com PCB LAYOUT 719B/719BF Main PCB Component Side... - Page 37 All manuals and user guides at all-guides.com 719B/719BF Main PCB Solder Side...
- Page 38 All manuals and user guides at all-guides.com 719B/719BF CRT PCB Component Side 719B/719BF CRT PCB Solder Side...
- Page 39 All manuals and user guides at all-guides.com 719BF Control PCB Component Side 719BF Control PCB Solder Side...
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Page 40: Schematic Diagram
All manuals and user guides at all-guides.com SCHEMATIC DIAGRAM Power & Connection Section... - Page 41 All manuals and user guides at all-guides.com Control & Vert. out Section...
- Page 42 All manuals and user guides at all-guides.com Horizontal Section...
- Page 43 All manuals and user guides at all-guides.com Video Section...
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Page 44: Exploded View & Mechanical Parts List
All manuals and user guides at all-guides.com EXPLODED VIEW & MECHANICAL PARTS LIST 719B 719B... - Page 45 All manuals and user guides at all-guides.com 719B 719BF...
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Page 46: Information Of Part Description
ELECTRICAL PARTS LIST The components identified by mark ! have special characteristics important for safety and x-ray radiation. These should be replaced only with the types specified in the parts list. Parts List for 719B & 719BF PART-CODE PART-NAME PART-DESC... - Page 47 All manuals and user guides at all-guides.com PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC C546 CMXM2A682J C MYLAR 100V 6800PF J (TP) C891 CCZB1H221K C CERA 50V B 220PF K C548 CCXF1H104Z C CERA 50V F 0.1MF Z C892 CCZB1H221K C CERA 50V B 220PF K C549 CMXM2A152J C MYLAR 100V 1500PF J (TP)
- Page 48 DIODE 1N4148 AUTO 52MM P001 9979500022 RECEPTACLE BNS-02AB2L-1 D801 DZN4148--- DIODE 1N4148 AUTO 52MM PCB1 9979800541 PCB MAIN T=1.6*246*247 (719B) D802 DZN4148--- DIODE 1N4148 AUTO 52MM PCB2 9979800543 PCB VIDEO T=1.6*123*95(719B) D803 DZN4148--- DIODE 1N4148 AUTO 52MM PR001 DECPAC140M POSISTOR...
- Page 49 All manuals and user guides at all-guides.com PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R001 RC-2Z684J- R CARBON COMP 1/2 680K OHM J R223 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R003 RS01Z513JS R M-OXIDE FILM 1W 51K OHM J SMALL R224 RD-AZ202J- R CARBON FILM 1/6 2K OHM J...
- Page 50 All manuals and user guides at all-guides.com PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R521 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R576 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R522 RD-AZ122J- R CARBON FILM 1/6 1.2K OHM J R579 RD-4Z220J- R CARBON FILM 1/4 22 OHM J...
- Page 51 R CARBON FILM 1/6 100 OHM J T501 5RD0000055 TRANS DRIVE DDT-719B R893 RD-AZ101J- R CARBON FILM 1/6 100 OHM J T601 5R50000039 TRANS DYNAMIC DYT-719B R916 RD-AZ202J- R CARBON FILM 1/6 2K OHM J TH001 DTP8D13--- THERMISTOR TP8D13 R922 DZN4148---...
- Page 52 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...