Daewoo CMC-518X Service Manual
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Daewoo CMC-518X Service Manual

Daewoo CMC-518X Service Manual

Xga color monitor
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Service Manual
XGA COLOR MONITOR
Model : CMC-518X
DAEWOO ELECTRONICS CO., LTD.
OVERSEAS SERVICE DEPT.

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Summary of Contents for Daewoo CMC-518X

  • Page 1 Service Manual XGA COLOR MONITOR Model : CMC-518X DAEWOO ELECTRONICS CO., LTD. OVERSEAS SERVICE DEPT.

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS GENERAL SAFETY INFORMATION SERVICING PRECAUTIONS TECHNICAL INFORMATION GENERAL INFORMATION PIN CONNECTOR CAUTIONS FOR ADJUSTMENT AND REPAIR ALIGNMENT PROCEDURE TROUBLESHOOTING HINTS OPERATION & ADJUSTMENT BLOCK DIAGRAM PCB LAYOUT SCHEMATIC DIAGRAM EXPLODED VIEW DIAGRAM REPLACEMENT PARTS LIST PARTS LIST...

  • Page 3: Safety Precautions

    X- radiation, shock, fire or other hazards. Do not modify the original design without getting a written permission from DAEWOO ELECTRONICS CO. or this will void the original parts and labor warranty.

  • 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 addenda, 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 commonly are called Electrostatically Sensitive (ES) Devices. The examples of typical ES devices are integrated circuits, some field-effect transistors and semiconductor "chip" components.
  • 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.

  • 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. Solder each device lead, and clip off excess lead. 6.

  • Page 9: General Information

    GENERAL INFORMATION This color monitor automatically scans all horizontal frequencies from 30KHz to 64KHz, and all vertical frequencies from 50Hz to 120Hz. This color monitor adopted the OSD (On Screen Display), it shows the sync polarity and frequency and it provides that easily adjust control. 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 diaplay when using the following graphics adapters : (VGA, 8514/A, Supper VGA, VESA and XGA and Apple Macintosh Video Card).

  • Page 10: Pin Connector

    PIN CONNECTOR Signal Green Blue GND(Self-Test) GND-Red GND-Green GND-Blue Arrangement of 15-pin D-sub connector No Pin GND-H.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: Alignment Procedure

    ALIGNMENT PROCEDURE Standard Adjustment Conditions 1. Power source voltage : 100~240Vac 50/60Hz 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 : 30 KHz - 54KHz Vertical Frequency : 50Hz - 120Hz Pre-Adjustment...
  • Page 12 (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 the a full white pattern is over 30Ft/L. If you satisfied with the result, readjust the internal sub contrast 6.

  • Page 13: Troubleshooting Hints

    TROUBLESHOOTING HINTS 1. No Character No Character Are the Change the Contrast & Contrast & Brightness control value Brightness Controls to maximum maximum ? Refer to No Raster whole screen No Raster bright? Is CRT Check the peripheral Cathode (Rk, Gk, Bk) circuit of CRT signal level Rk, Gk, Bk...
  • Page 14 2. No Raster No Raster Heater Voltage Trouble in CRT heater (CRT PWB) red-hot? about Increase the Brightness Refer to trouble in Trouble in & Contrast control level power supply unit. power supply fully Maxium circuit Trouble in whole screen video bright? circuit...
  • Page 15 3. A Missing Color One color is missing Check video signal input signal cable or video card. normal? 0.7Vpp Is the Trouble in output of pre-amp IC801 or its IC801, ambient circuit pin 15, 19, 22 all normal? Trouble in video output video output circuit,...
  • Page 16 4. Abnormal OSD Font * If menu key selected. Abnormal OSD Font Is menu the Fast Trouble in key selected? Blanking signal IC204 or its Is OSD Font (IC204 pin12) ambient circuit exist? normal? Trouble in IC801 One color is and its ambient missing circuit...
  • Page 17 5. Horizontal Output Circuit Trouble in Horizontal output circuit (No Raster) MODE B+ Voltage 72Vdc S.VGA 89Vdc 54KHz 121Vdc Refer to trouble Trouble in power B+ line voltage in power supply supply circuit normal? unit Q502 base Trouble in FBT waveform 14.5Vp-p normal?
  • Page 18 6. Unstable Picture 6.1 Horizontal Unstable picture Is the Trouble in IC501 pulse of pin 15 of or its ambient the IC501 circuit correct? Is the Check IC201 and pulse of pin 33 of its ambient circuit the IC201 correct? 5Vpp Is the Check the IC201 and...
  • Page 19 6-2.Vertical Unstable picture Is the 12Vdc Refer to P.S.V line voltage is correct? Is the Trouble in pulse of pin 4, 6 of vertical D.Y the IC401 correct? Is the output of Check the IC401 and pin 12, 13 of IC501 its ambient circuit all normal? Check the IC501 and its...
  • Page 20 7. Focus Monitor remains unfocused Check Focus VR in Focus acceptable? Trouble in Focus circuit (FBT)
  • Page 21 8. Convergence Poor convergence Adjust static convergence convergence on the center area bad? Refer to Adjustment procedure of convergence Adjust D.Y convergence on the Location fringe area bad?

  • Page 22: Horizontal Size

    9. Abnormal Picture 9.1 Horizontal Size * At first, adjust controls in the OSD Menu Abnormal H.Size Check the Q515, changeable the changeable the Q516 and its DC level of the base DC level of pin 7 of ambient circuit of Q508? the IC201? Is the...

  • Page 23: Vertical Size

    9.2 Vertical Size Abnormal V.Size changeable the Check the IC201 DC voltage and its of IC201 ambient circuit pin37 Trouble in Vertical Output Circuit Refer to Vertical Output circuit...
  • Page 24 10. Side-Pincushion Circuit Side-Pincushion distortion is excessive or barrel Select the side-pincushion icon in OSD menu, and adjust acceptable position Is the Check the Q507, Q510 waveform of IC501 and its (pin 11) correct? ambient circuit Check the IC501 and its ambient circuit...
  • Page 25 11. Power Supply Unit (P.S.U) Trouble P.S.U power switch Switch on Check the power cord outlet fuse F001 and diode Bridge D001 O.K? Replace IC002 the IC002 O.K? Trouble in bridge diode voltage of D001 D001 or peripheral pin 4 130V (270V)? device Trouble in switching Is the...
  • Page 26 Trouble in D104, voltage of C110 T001 35V DC? Is voltage Trouble in D106, of IC112 pin 3 Q104 or IC112 12V DC? voltage of Trouble in IC111 IC111 pin 3 D103 5V DC? P.S.U O.K...

  • Page 27: Operation & Adjustment

    OPERATION & ADJUSTMENT – EXIT ADJUST SELECT MENU : Launch OSD(On-Screen Display) Menus MENU : Select the next function : Select the previous function : Increase the value of any selected function : Decrease the value of any selected function –...
  • Page 28 1. OSD(On-Screen Display) Menu 1 Adjust the contrast of image, the difference between light and dark areas CONTRAST on the screen. Adjust the brightness of the entire BRIGHTNESS display. Adjust the position of the display horizontally H. POSITION (left or right). Adjust the display width (horizontal size).
  • Page 29 2. OSD (On-Screen Display) Menu 2 Adjust the left and right margins for more convex or more concave margins. PINCUSHION ƒUImage turns to ƒUImage turns to – Adjust the trapezoid of the screen by moving TRAPEZOID the lines inward or outward. ƒUImage turns to ƒUImage turns to –...

  • Page 30: Block Diagram

    BLOCK DIAGRAM...

  • Page 31: Pcb Layout

    PCB LAYOUT Main PCB Solder Side...
  • Page 32 Video PCB Solder Side...
  • Page 33 Main PCB Component Side...
  • Page 34 Video PCB Component Side...

  • Page 35: Schematic Diagram

    SCHEMATIC DIAGRAM...

  • Page 37: Exploded View Diagram

    EXPLODED VIEW DIAGRAM...

  • Page 38: Replacement Parts List

    REPLACEMENT PARTS LIST 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% ¡ 20% ¡...

  • Page 39: Parts List

    These should be replaced only with the types specified in the parts list. PART-CODE PART-NAME PART-DESC 10010 PCFMCAG067 COVER FRONT AS CMC-518X CGND 9970710164 CRT GND AS 0.12*6*16+BL102NG=630 ! CRT 9979615003 M36KXU110XX61(T)
  • Page 40 COIL CHOCK TCH-12A PR001 DECPAC140M POSISTOR ECPAC140M290 P001 9979500012 RECEPTACLE 02ME4E1/FILTER EMI Q001 PCHCSWG067 HEAT SINK C AS CMC-518X Q001A T2SK2333-- 2SK2333 Q001B 9977018772 HEAT SINK 187 A1050P-H24 42X40 Q001C 9976012100 SCREW SPECIAL TT2 BIN 3*10 MFZN PW ! Q502...
  • Page 41 SCREW TAPPTITE TT2 BIN 4X10 MFZN 00040 7S103B4081 SCREW SPECIAL M/C BIN 4*8 MFZN 30010 PCMPJ1G067 PCB SMD AS CMC-518X C008 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 C108 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012...
  • Page 42 PART-CODE PART-NAME PART-DESC R203 HRFT202JCA R CHIP 1/10 2K OHM J 2012 R205 HRFT202JCA R CHIP 1/10 2K OHM J 2012 R207 HRFT562JCA R CHIP 1/10 5.6K OHM J 2012 R208 HRFT105JCA R CHIP 1/10 1M OHM J 2012 R209 HRFT562JCA R CHIP 1/10 5.6K OHM J 2012...
  • Page 43 R CHIP 1/10 68K OHM J 2012 R579 HRFT473JCA R CHIP 1/10 47K OHM J 2012 40010 PCMPJ0G067 PCB MAIN ODD SHAPE A CMC-518X CW202 485923262S CONN WAFER 5267-05A STICK TYPE C007 CCYB3A103K C CERA 1KV B 0.01MF K C014...
  • Page 44 PART-CODE PART-NAME PART-DESC C018 CH1FDF222M C CERA AC HIKB AC400V 222M C019 CH1FDF222M C CERA AC HIKB AC400V 222M C101 CCXB3A101K C CERA 1KV B 100PF K C102 CEXF2C101V C ELECTRO 160V RSS 100MF (16X25) TP C103 CCXB3A101K C CERA 1KV B 100PF K C104 CEYF2A221V...
  • Page 45 CCT 063BT 5K OHM B TAP VR504 RV6121104P R SEMI FIXED CCT 063BT 100K OHM B TAP 50010 PCMPJRG067 PCB MAIN RADIAL AS CMC-518X C005 CEXF1H470C C ELECTRO 50V RUS 47MF (6.3X11) TP C009 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP...
  • Page 46 PART-CODE PART-NAME PART-DESC C107 CEXF1C101C C ELECTRO 16V RUS 100MF (6.3X11) TP C114 CEXF1E101C C ELECTRO 25V RUS 100MF (6.3X11) TP C201 CEXF1H229V C ELECTRO 50V RSS 2.2MF (5X11) TP C210 CCXB1H102K C CERA 50V B 1000PF K (TAPPING) C217 CEXF1H479V C ELECTRO 50V RSS 4.7MF (5X11) TP...
  • Page 47 PART-CODE PART-NAME PART-DESC C513 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C514 CMXM2A103J C MYLAR 100V 0.01MF J (TP) C518 CMXM2A472J C MYLAR 100V 4700PF J (TP) C519 CCXB1H222K C CERA 50V B 2200PF K (TAPPING) C520 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C522 CCXB1H103K...
  • Page 48 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q525 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q526 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) X201 5PEF0EC8T4 RESONATOR EFOEC8004T4 60010 PCMPJAG067 PCB MAIN AXIAL AS CMC-518X BD001 5PB13890-- COIL BEAD BI3890 BD002 5PB13857-- COIL BEAD BI3857(AXIAL) BD003 5PB13857-- COIL BEAD BI3857(AXIAL) BD004 5PB13890-- COIL BEAD...
  • Page 49 PART-CODE PART-NAME PART-DESC D206 DZN4148--- DIODE 1N4148 AUTO 52MM D210 DZN4148--- DIODE 1N4148 AUTO 52MM D211 DZN4148--- DIODE 1N4148 AUTO 52MM D212 DZN4148--- DIODE 1N4148 AUTO 52MM D213 DZN4148--- DIODE 1N4148 AUTO 52MM D214 DZN4148--- DIODE 1N4148 AUTO 52MM D502 DZN4148--- DIODE 1N4148 AUTO 52MM...
  • Page 50 PART-CODE PART-NAME PART-DESC J003 85801052GY WIRE COPPER 1/0.52 TIN COATING J014 85801052GY WIRE COPPER 1/0.52 TIN COATING J101 85801052GY WIRE COPPER 1/0.52 TIN COATING J102 85801052GY WIRE COPPER 1/0.52 TIN COATING J103 85801052GY WIRE COPPER 1/0.52 TIN COATING J105 85801052GY WIRE COPPER 1/0.52 TIN COATING J106...
  • Page 51 PART-CODE PART-NAME PART-DESC J143 85801052GY WIRE COPPER 1/0.52 TIN COATING J144 85801052GY WIRE COPPER 1/0.52 TIN COATING J145 85801052GY WIRE COPPER 1/0.52 TIN COATING J146 85801052GY WIRE COPPER 1/0.52 TIN COATING J147 85801052GY WIRE COPPER 1/0.52 TIN COATING J148 85801052GY WIRE COPPER 1/0.52 TIN COATING J149...
  • Page 52 PART-CODE PART-NAME PART-DESC J183 85801052GY WIRE COPPER 1/0.52 TIN COATING J184 85801052GY WIRE COPPER 1/0.52 TIN COATING J185 85801052GY WIRE COPPER 1/0.52 TIN COATING J186 85801052GY WIRE COPPER 1/0.52 TIN COATING J187 85801052GY WIRE COPPER 1/0.52 TIN COATING J188 85801052GY WIRE COPPER 1/0.52 TIN COATING J189...
  • Page 53 PART-CODE PART-NAME PART-DESC R109 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R110 RD-4Z101J- R CARBON FILM 1/4 100 OHM J R111 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R202 RD-AZ393J- R CARBON FILM 1/6 39K OHM J R204 RD-AZ393J- R CARBON FILM 1/6 39K OHM J...
  • Page 54 PART-CODE PART-NAME PART-DESC R416 RD-4Z363J- R CARBON FILM 1/4 36K OHM J R419 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R421 RD-AZ243J- R CARBON FILM 1/6 24K OHM J R422 RD-AZ912J- R CARBON FILM 1/6 9.1K OHM J R501 RD-AZ122J- R CARBON FILM 1/6 1.2K OHM J...
  • Page 55 1/6 10K OHM J R575 RD-AZ103J- R CARBON FILM 1/6 10K OHM J 00001 9979800453 PCB MAIN T1.6*330*246 30020 PCCTSWG067 PCB CRT AS CMC-518X BD894 5MBFD3512R EMI BEAD FILTER BFD 3512 R2 CA801 9970710165 CONN AS 35718-0810+1015#22=160 CW801 9979220021 CONN WAFER...
  • Page 56 R CHIP 1/10 6.2K OHM J 2012 R882 HRFT101JCA R CHIP 1/10 100 OHM J 2012 50010 PCCTJ0G067 CRT PCB ODD ASS¡fl Y CMC-518X C893 CEXF1C471V C ELECTRO 16V RSS 470MF (10X12.5)TP 4857417500 TERM PIN DA-IB0214(D2.3/DY PIN) 4857417500 TERM PIN DA-IB0214(D2.3/DY PIN)
  • Page 57 2W 2.4K OHM J (TAPPING) R872 RS02Z242J- R M-OXIDE FILM 2W 2.4K OHM J (TAPPING) 60010 PCCTJRG067 PCB CRT RADIAL AS CMC-518X C805 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C807 CXCH1H470J C CERA 50V CH 47PF J (TAPPING)
  • Page 58 PH2369 Q863 TBFQ221--- BFQ221 Q864 TBFQ241--- BFQ241 Q865 TKTA1268GR KTA1268GR Q866 TKTC3200Y- KTC3200Y 70010 PCCTJAG067 PCB CRT AXIAL AS CMC-518X BD890 5PB13857-- COIL BEAD BI3857(AXIAL) BD891 5PB13857-- COIL BEAD BI3857(AXIAL) BD892 5PB13857-- COIL BEAD BI3857(AXIAL) BD893 5PB13857-- COIL BEAD BI3857(AXIAL)
  • Page 59 PART-CODE PART-NAME PART-DESC J811 85801052GY WIRE COPPER 1/0.52 TIN COATING J812 85801052GY WIRE COPPER 1/0.52 TIN COATING J813 85801052GY WIRE COPPER 1/0.52 TIN COATING PART-CODE PART-NAME PART-DESC J814 85801052GY WIRE COPPER 1/0.52 TIN COATING J815 85801052GY WIRE COPPER 1/0.52 TIN COATING J816 85801052GY WIRE COPPER...
  • Page 60 DWSP201M-- SURGE ABSORBER WSP-201M SG890 DWSP201M-- SURGE ABSORBER WSP-201M 00001 9979800469 PCB CRT T1.6*175*92 10020 PCBCCPG067 COVER REAR AS CMC-518X 00010 9972115200 COVER REAR FR-ABS GY-258A 00010 2221080957 RESIN ABS LG AF-312 88328B(GY-275A) 00020 9975420500 LABEL RATING P.E T=0.1*98*78 00030...
  • Page 61 DAEWOO ELECTRONICS CO., LTD. 686, AHYEON-DONG MAPO-GU 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:...

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