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Summary of Contents for Daewoo L510B1
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Page 1: Service Manual
Service Manual XGA COLOR MONITOR Model : L510B1 DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr September, 2001... -
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 & 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 the inverter that generates the high voltage to lighten CCFL of the LCD panel. -
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
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: Small-Signal" Discrete Transistor Removal/Replacement
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. -
Page 8: Technical Information
Diode Removal/Replacement 1. Remove defective diode by clipping its leads as close as possible to diode body. 2. Bend the two remaining leads perpendicularly to the circuit board. 3. Observing diode polarity, wrap each lead out of the new diode around the corresponding lead on the circuit board. -
Page 9: General Information
GENERAL INFORMATION This TFT LCD monitor automatically scans all horizontal frequencies from 30KHz to 62KHz, and all vertical frequencies from 50Hz to 75Hz. This TFT LCD 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, 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 GND - H.Sync GND - V.Sync Bi-directional Data (SDA) Horizontal Sync Vertical Sync (VCLK) Data Clock (SCL) CAUTIONS FOR ADJUSTMENT AND REPAIR • Degaussing is always required when adjusting purity or convergence. •... -
Page 11: Operation & Adjustment
OPERATION AND ADJUSTMENT Control Panel AUTO AUTO • The AUTO button launches the AUTO TRACKING function directly. EXIT • The EXIT button turns the OSD (On-Screen Display) window off. • This button moves from sub menu to top menu in the OSD window. •... -
Page 12: Key Process
Key Process MENU U T L T Y M E N U U T L TY MENU MENU EXIT EXIT S H A R PN E S S U T L T Y S H A R PN E S S EXIT OSD OFF... -
Page 13: Adjustment Procedure
Adjustment Procedure Is the H.Size proper? Is the noise displayed on the screen? Perform the AUTO TRACKING Is the noise displayed on the screen yet? Adjust the CLOCK FINE until the screen is cleared. Is the noise displayed on the screen yet? Adjust the CLOCK control. -
Page 14: Osd Functions
OSD Functions ICON CONTROL LANGUAGE CLOCK CLOCK FINE AUTO TRACKING COLOR TEMP RED CONTROL GREEN CONTROL BLUE CONTROL H. CENTER & V. CENTER SHARPNESS OSD POSITION TIME OUT STATUS RECALL AUTO POSITION CONTRAST FUNCTIONS Select language for OSD (6 languages). Adjust the width (horizontal size) of the screen image. -
Page 15: Self Diagnosis
Self Diagnosis When the monitor doesn’t display, if you press any key, Self Diagnosis screen is displayed. Self Diagnosis function checks if the status of the monitor is No Signal or Out of range. No Signal screen is displayed when the D-Sub signal connector is not connected or the status of the monitor is on DPMS mode. -
Page 16: Alignment Procedure
ALIGNMENT PROCEDURE Standard Check point 1. Power source : 100 - 240Vac, 50/60Hz. 2. Aging : Take at least 20 minutes warm-up time. 3. Signal Video input : Analog 0.7Vpp 75 terminal positive polarity Synchronizing : acceptable negative or positive at TTL level Max. -
Page 17: Troubleshooting Hints
TROUBLESHOOTING HINTS 1. Abnormal mode detect Abnormal mode detect Is a input H-sync of ADC(pin 90, U2) correct? Is waveform of pin 81 of ADC(U2) correct? Trouble in Scaler(U1). Trouble in the H-sync input circuit. Trouble in ADC. - Page 18 2. Trouble in Power on Power LED toggled between on and Is the power cord well connected? Check the waveform of pin 7 Is 5VS line normal(pin 8 of CN2)? Check on Scaler(U1). Is the off? -com. Refer to No video or No raster.
- Page 19 3. No Raster Check the output of Q2 or pin 3 of U3. Is 12V plugged in pin 1 of CN4A(power board)? Is the output of inverter correct? Replace a LCD panal. < 2.5 > 2.5 of D811(power board). Replace the inverter. Trouble in Q6 or pin 3 of -com.
- Page 20 4. One color is missing One color is missing Is the OSD color signal normal? R,G,B Digital values (every eight bits) correct on ADC output Trouble in the soldering of R,G,B data lines from output of ADC to Scaler(U1). normal? Is the input Are the stage?
- Page 21 5. No Video Has display image only white? Check if the CN5 wafer is well connected at the LCD panel. Is pin 1 of Q6 3.3V? Check the output of scalier (pin 71, 72, 73, 74, 75) and soldering of CN5. Connection trouble.
- Page 22 5-1. No Video Black Is OSD normal? Is the contrast at its maximum? Is the output of ADC correct? Next Page. Is the output of Scaler correct? Check If the CN5 wafer is well connected at the LCD panel. 3. No raster or Check SDRAM.
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Page 23: Power Problem
6. Power Problem Is the power Check if the power cord well cord is correctly connected? connected. Check 5VS, 5VD, 5VA, 6V, 3.3V of CN2A. the output of D812 6.2V? Check the main board. Check ambient circuit of IC801. -
Page 24: Block Diagram
BLOCK DIAGRAM... -
Page 25: Pcb Layout
PCB LAYOUT Main PCB Component Side Main PCB Solder Side... - Page 26 Control PCB Component Side Control PCB Solder Side...
- Page 27 Power & D-Sub PCB Component Side Power & D-Sub PCB Solder Side...
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Page 28: Schematic Diagram
SCHEMATIC DIAGRAM Main Section... - Page 29 SMPS Section...
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Page 30: Exploded View & Mechanical Parts List
EXPLODED VIEW & MECHANICAL PARTS LIST... -
Page 31: 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 Tolerance ± 1% ± 5% ± 10% ±... -
Page 32: Electrical Parts List
ELECTRICAL PARTS LIST The components identified by mark These should be replaced only with the types specified in the parts list. PART-CODE PART-NAME 00020 W3415M731- CORD POWER 00040 9970800035 CABLE SIGNAL AS 15P+15P/DDC=1.5M(GY275A) B801 5PB13857-- COIL BEAD HCQK100JBA C CHIP CERA HCBK223KBA C CHIP CERA C101 HCENH101MD C CHIP ELECTRO C102 HCENH101MD C CHIP ELECTRO... - Page 33 PART-CODE PART-NAME HCEDC470MC C CHIP ELECTRO MV 6.3V 47MF 5DX5.2H HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 HCEDC470MC C CHIP ELECTRO MV 6.3V 47MF 5DX5.2H HCEKF100MC C CHIP ELECTRO MV 16V 10MF D4.0XH5.2 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 HCFK104ZBA C CHIP CERA...
- Page 34 HRFS102JBA R CHIP DLF-2323 HRFS102JBA R CHIP L-82 HRFS472JBA R CHIP L150X2M HRFS101JBA R CHIP SD50GYW(GREEN/AMBER) HRFS101JBA R CHIP T=1.6*138*100 (L510B1) HRFS000JBA R CHIP T=1.6*162*102.5(L510B) HRFS472JBA R CHIP T=1.6*246*122 HRFS750JBA R CHIP KTC3875SY(RTK) HRFS750JBA R CHIP KTC3875SY(RTK) HRFS750JBA R CHIP...
- Page 35 PART-CODE PART-NAME HRFS472JBA R CHIP 1/16 4.7K OHM J 1608 HRFS102JBA R CHIP 1/16 1K OHM J 1608 HRFS102JBA R CHIP 1/16 1K OHM J 1608 RD-AZ302J- R CARBON FILM 1/6 3K OHM J R801 RD-2Z684J- R CARBON FILM 1/2 680K OHM J R803 RS01Z513J- R M-OXIDE FILM 1W 51K OHM J...
- Page 36 DAEWOO ELECTRONICS CO., LTDD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : "DAEWOOELEC"...
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