Daewoo L700C Service Manual
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Daewoo L700C Service Manual

Daewoo L700C Service Manual

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Service Manual

XGA COLOR MONITOR
Model :
L700C/L700CM
L701C/L701CM
L700CAV
DAEWOO ELECTRONICS CO., LTD.

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Summary of Contents for Daewoo L700C

  • Page 1: Service Manual

    Service Manual XGA COLOR MONITOR Model : L700C/L700CM L701C/L701CM L700CAV DAEWOO ELECTRONICS CO., LTD.
  • Page 2 资料库 转载请注明出处 http://scwj.8800.org http://wjbbs.mpc.cn 请保留此页...

  • Page 3: General 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 4: 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 5: 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 6: 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 7: General Information

    GENERAL INFORMATION This TFT LCD monitor automatically scans all horizontal frequencies from 30KHz to 80KHz, and all vertical frequencies from 56Hz to 77Hz. 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, XGA, SXGA and Apple Macintosh Video Card).

  • Page 8: Pin Connector

    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 9: Operation And Adjustment

    OPERATION AND ADJUSTMENT << L700C/L700CM >> Control Panel POWER POWER Indicator swithes the monitor on and off. shows both normal operation and power management status with power indicator light. moves cursor to the right or low moves cursor to the left or high window...

  • Page 10: Key Process

    Key Process MENU 1280X1024 UT L T Y U T L T Y SELECT SELECT EXIT EXIT U T L TY SH AR P N ES S SH AR PN ES S EXIT OSD OFF HOT KEY AUTO AUTO TRACK ING When there is no OSD, if you press this AUTO button, you can use the best display performance fit for a current mode.
  • Page 11 << L701C/L701CM >> Control Panel POWER POWER Indicator swithes the monitor on and off. shows both normal operation and power management status with power indicator light. EXIT AUTO MENU SELECT BRIGHTNESS moves cursor to the right or low moves cursor to the left or high window window in the OSD window and in the OSD window and decreases increases the value of any selected...
  • Page 12 Key Process MENU U T L T Y 1280X1024 U T L TY SELECT SELECT EXIT EXIT SHAR PNESS UT L TY S HA RPN ESS EXIT OSD OFF HOT KEY AUTO When there is no OSD, if you press this AUTO button, you can AUTO T RACK ING use the best display performance fit for a current mode.
  • Page 13 << L700CAV >> Control Panel POWER POWER Indicator swithes the monitor on and off. shows both normal operation and power management status with power indicator light. moves cursor to the right or low window moves cursor to the left or high window in the OSD window and increases the in the OSD window and decreases value value of any selected function.
  • Page 14 Key Process MENU U T L T Y 1280X1024 U T L TY SELECT SELECT EXIT EXIT U T L T Y S H A R PN E S S S H A R PN E S S EXIT OSD OFF HOT KEY AUTO When there is no OSD, if you press this AUTO button, you can...

  • Page 15: Adjustment Procedure

    Adjustment Procedure Is the H.Size Adjust the CLOCK proper? control. Perform the AUTO Is the POSITION 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.
  • Page 16 OSD Functions (L700C/L700CM/L701C/L701CM) ICON CONTROL FUNCTIONS Select language for OSD (6 languages). LANGUAGE Adjust the width (horizontal size) of the screen image. CLOCK Sharpen the focus by aligning the illuminated pixels and adjust until the screen image looks focused, crisp and sharp. Adjusting the...
  • Page 17 OSD Functions (L700CAV) << OSD FUNCTIONS WITH USING PC >> SOUND VOLUME Increase or decrease audio volume. Balance audio sound. BALANCE Adjust high frequency response. TREBLE Adjust low frequency response. BASS CLOCK CLOCK Adjust the width (horizontal size) of the screen image. Sharpen the focus by aligning the illuminated pixels and adjust until the screen image looks focused, crisp and sharp.
  • Page 18 UTILITY Adjust the display image quality (if the screen proceed to scaling up). SHARPNESS Adjust the OSD position horizontally (left or right) and vertically (up or down). OSD POSITION Adjust the display OSD Menu. OSD TIME OUT STATUS Display horizontal & vertical frequency and polarity. Reset the screen to the Factory Preset Display Settings.
  • Page 19 << OSD FUNCTIONS WITH USING VIDEO >> Increase or decrease audio volume. VOLUME Adjust the brightness of image. BRIGHTNESS CONTRAST Adjust the contrast of image. COLOR Adjust saturation of image. SATURATION Adjust the hues of image. Adjust the display image quality (if the screen proceed to scaling up). SHARPNESS SOUND BALANCE...

  • Page 20: Self Diagnosis

    Self Diagnosis If there is no image, the Self Diagnosis screen will be displayed. Self Diagnosis function checks if the status of the monitor screen is No Signal, Out of range or None support. “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 21: 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 75Ω terminal positive polarity Synchronizing : acceptable negative or positive at TTL level Max.
  • Page 22 TROUBLESHOOTING HINTS (L700C/L700CM/L701C/L701CM) 1. Abnormal mode detect Abnormal mode detect Is a input Trouble in the H-sync H-sync of ADC(pin 40, input circuit. U13) correct? Is waveform Trouble of pin 81 of ADC(U13) in ADC. correct? Trouble in Scaler(U9).
  • Page 23 2. Trouble in Power on Is the Refer to No video Power LED toggled or No raster. between on and off? Check if the power switch Is the power is on position and cord well Connect the power connected? cord correctly. Check the Trouble in U7 &...
  • Page 24 3. No Raster Check the Trouble in Q5 or output of Q4 or pin 41 of -com. pin 41 of U6. < 2.5 > 2.5 Is 12V plugged in pin 1 Check the output of CN4A(power of D811(power board). board)? Is the output of Replace the inverter.
  • Page 25 4. One color is missing One color is missing Check the output Is the OSD color signal of Scaler. normal? Is the input Check the video signal signal normal? cable or R,G,B con-ass’y. Are the R,G,B Digital values Check the ambient (every eight bits) correct circuit of ADC.
  • Page 26 5. No Video Has display image Next page. only white? Check if the CON7 wafer is Connection trouble. well connected at the LCD panel. Check Q5, its ambient Is pin 5, 6, 7, 8 circuit and pin 42 of U6. of Q5 5V? Check interface (to -com) of scalier (pin 71~78) and...
  • Page 27 5-1. No Video Black Is OSD normal? 3. No raster Set the contrast Is the contrast up to Max. at its maximum? Is the output of Is the input of ADC correct? ADC correct? Check the video Replace the main board Next Page.

  • Page 28: Power Problem

    6. Power Problem Is the power Check if the power cord well cord is correctly connected? connected. Check 5VS, 5VD, 5VA 3.3V of CN2A. the output of D812 6.2V on power board? Check the main board. Check ambient circuit of IC801 on power board.
  • Page 29 TROUBLESHOOTING HINTS (L700CAV) 1. Abnormal mode detect 1-1. Abnormal mode detect for PC Source Abnormal mode detect Is a input Trouble in the H-sync H-sync of ADC(pin 40, input circuit. U13) correct? Is waveform Trouble of clock of ADC(pin81, in ADC. U13) correct? Trouble in Scaler(U9).
  • Page 30 1. Abnormal mode detect 1-2. Abnormal mode detect for AV Source Abnormal mode detect Is a input signal of Decoder Check CON 4 and (pin 10 at CVBS or I/O Board. pin 14, 18 at S- Video of U5)? Is clock of Trouble in Decoder (pin 94, U5) decoder(U5).
  • Page 31 2. Trouble in Power on Is the Refer to No video Power LED toggled or No raster. between on and off? Check if the power switch Is the power is on position and cord well Connect the power connected? cord correctly. Check the Trouble in U7 &...
  • Page 32 3. No Raster Check the Trouble in Q5 or output of Q4 or pin 41 of -com. pin 41 of U6. < 2.5 > 2.5 Is 12V plugged in pin 1 Check the output of CN4A(power of D811(power board). board)? Is the output of Replace the inverter.
  • Page 33 4. One color is missing for PC Source One color is missing Check the output Is the OSD color signal of Scaler. normal? Is the input Check the video signal signal normal? cable or R,G,B con-ass’y. Are the R,G,B Digital values Check the ambient (every eight bits) correct circuit of ADC.
  • Page 34 5. No Video Has display image Next page. only white? Check if the CON7 wafer is Connection trouble. well connected at the LCD panel. Check Q5, its ambient Is pin 5, 6, 7, 8 circuit and pin 42 of U6. of Q5 5V? Check interface (to -com) of scalier (pin 71~78) and...
  • Page 35 5. No Video 5-1. No video for PC Source Black Is OSD normal? 3. No raster Set the contrast Is the contrast up to Max. at its maximum? Is the output of Is the input of ADC correct? ADC correct? Check the video Replace the main board Next Page.
  • Page 36 5. No Video 5-2. No video for AV Source Black Is OSD normal? 3. No raster Set the contrast Is the contrast up to Max. at its maximum? Is the input of Is the output of Decoder(U5) Decoder(U5) correct? correct? Check the video Replace the main board Next Page.
  • Page 37 6. Power Problem Is the power Check if the power cord well cord is correctly connected? connected. Check 5VS, 5VD, 5VA 3.3V of CN2A. the output of D812 6.2V on power board? Check the main board. Check ambient circuit of IC801 on power board.

  • Page 38: Sound Problem

    7. Sound Problem No Sound Audio-in OK? Check Audio-in (pin 10, 14 at PC Source jack(CN 11). and pin 9, 13 at AV Source Is input of Is VDD(pin2) 9V regulator(IC 602) of Audio IC(IC 601) 12V? Change 9V Regulator (IC 602).

  • Page 39: Main Pcb

    MAIN PCB LVDS R(8),G(8),B(8) DATA(12) CLOCK(4) Scaler H/V SYNC. / DOT CLOCK LCD Panel Modular ASI311 L170E3 EC-5 14.318 4 x CCFL R(8), TMDS TMDS G(8), SIGNA ON/OFF 4:2:2 B(8) 24.576 24C08 12 MHz DECODER Inverter Hsync ON/OFF Hsync Pixel Pixel -CLK -CLK...
  • Page 40 VGA Analog Input Section...
  • Page 41 DTF Connection TMDS Section...
  • Page 42 Damping Networks Section...
  • Page 43 NTSL/PAL Decoder Section...
  • Page 44 Mysonweltrend Microcontroller Section...
  • Page 45 ASI 311 Section...
  • Page 46 ASI 311 Decoupling Caps Section...
  • Page 47 LCD Panel Interface Section...
  • Page 48 Power Distribution Section...
  • Page 49 Audio Interface Section...
  • Page 50 Analog ADC (AD9884A-140) Section...

  • Page 52: 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 53 ELECTRICAL PARTS LIST (L700C/L700CM/L701C/L701CM) 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. LEVEL PART-CODE PART-NAME PART-DESC NOTE 1 Z1010 PCFMCAJ191(192) COVER FRONT AS...
  • Page 54 LEVEL PART-CODE PART-NAME PART-DESC NOTE 4 C125 HCQK180JBA C CHIP CERA 50V CH 18PF J 1608 4 C126 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C127 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C128 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608...
  • Page 55 LEVEL PART-CODE PART-NAME PART-DESC NOTE 4 C191 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C192 HCEEF101MD C CHIP ELECTRO MV 16V 100MF M 6.3DX5.7H 4 C193 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C194 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608...
  • Page 56 LEVEL PART-CODE PART-NAME PART-DESC NOTE 4 FB24 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JT 4 FB25 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JT 4 FB26 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JT 4 FB28 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JT 4 FB29 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JT 4 FB30 HFFHH1M601 COIL CHIP BEAD...
  • Page 57 LEVEL PART-CODE PART-NAME PART-DESC NOTE 4 R136 HRFS102JBA R CHIP 1/16 1K OHM J 1608 4 R14 HRFS332JBA R CHIP 1/16 3.3K OHM J 1608 4 R142 HRFS472JBA R CHIP 1/16 4.7K OHM J 1608 4 R143 HRFS102JBA R CHIP 1/16 1K OHM J 1608 4 R16 HRFS121JBA...
  • Page 58 LEVEL PART-CODE PART-NAME PART-DESC NOTE 4 RA24 HRTS8E330J R CHIP ARRAY 1/16 8P 33 OHM 3216 4 RA28 HRTS8E330J R CHIP ARRAY 1/16 8P 33 OHM 3216 4 RA29 HRTS8E330J R CHIP ARRAY 1/16 8P 33 OHM 3216 4 RA30 HRTS8E330J R CHIP ARRAY 1/16 8P 33 OHM 3216...
  • Page 59 LEVEL PART-CODE PART-NAME PART-DESC NOTE 3 CN2A 99707A0024 CONN AS 35164+YDH200+2464#24=150 3 CN4A 9970750037 CONN AS 5264+35164+2464#24=135 3 CN6A 9979200203 CONN WAFER YW396-03AV 3 D801 DD3SBA60-- DIODE D3SBA60 3 D811 PCHCSWJ184 HEAT SINK C AS CML-700C 4 00010 9977031900 HEAT SINK 319 AL T=2.0 4 00020 9976012700...
  • Page 60 LEVEL PART-CODE PART-NAME PART-DESC NOTE 6 D805 DZN4148--- DIODE 1N4148 AUTO 52MM 6 D807 DUF4007--- DIODE UF4007 6 D809 DUG2D----- DIODE UG2D 200V 2A 6 DZ803 DDZ22BM--- DIODE ZENER DZ22BM 6 DZ806 DGDZJ18C-- DIODE ZENER GDZJ 18C 6 J803 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING 6 J805...
  • Page 61 LEVEL PART-CODE PART-NAME PART-DESC NOTE 6 R840 RN-AZ6491F R METAL FILM 1/6W 6.49K OHM F (TP) 6 R841 RD-AZ102J- R CARBON FILM 1/6 1K OHM J 6 R854 RD-AZ102J- R CARBON FILM 1/6 1K OHM J 6 R855 RD-4Z512J- R CARBON FILM 1/4 5.1K OHM J 2 Z2050 PCDSSWJ191(192) PCB D-SUB AS CML-700C(L700CM)
  • Page 62 ELECTRICAL PARTS LIST (L700CAV) 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. LEVEL PART-CODE PART-NAME PART-DESC 1 Z1010 PCFMCAJ184 COVER FRONT AS CML-700CAV 2 CA001 9970703000 CONN AS...
  • Page 63 LEVEL PART-CODE PART-NAME PART-DESC 4 C12 HCFH473ZBA C CHIP CERA 25V Y5V 0.047MF Z 1608 4 C120 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C121 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C122 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C123...
  • Page 64 LEVEL PART-CODE PART-NAME PART-DESC 4 C183 HCEDC470MC C CHIP ELECTRO MV 6.3V 47MF 5DX5.2H 4 C190 HCEEF101MD C CHIP ELECTRO MV 16V 100MF M 6.3DX5.7H 4 C191 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C192 HCEEF101MD C CHIP ELECTRO MV 16V 100MF M 6.3DX5.7H 4 C193 HCFK104ZBA...
  • Page 65 LEVEL PART-CODE PART-NAME PART-DESC 4 C82 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C83 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C84 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C85 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608 4 C86...
  • Page 66 LEVEL PART-CODE PART-NAME PART-DESC 4 R102 HRFS472JBA R CHIP 1/16 4.7K OHM J 1608 4 R104 HRFS000JBA R CHIP 1/16 0 OHM J 1608 4 R105 HRFS102JBA R CHIP 1/16 1K OHM J 1608 4 R106 HRFS101JBA R CHIP 1/16 100 OHM J 1608 4 R107 HRFS101JBA R CHIP...
  • Page 67 LEVEL PART-CODE PART-NAME PART-DESC 4 R50 HRFS180JBA R CHIP 1/16 18 OHM J 1608 4 R51 HRFS560JBA R CHIP 1/16 56 OHM J 1608 4 R52 HRFS180JBA R CHIP 1/16 18 OHM J 1608 4 R53 HRFS560JBA R CHIP 1/16 56 OHM J 1608 4 R54 HRFS180JBA R CHIP...
  • Page 68 LEVEL PART-CODE PART-NAME PART-DESC 4 RA29 HRTS8E330J R CHIP ARRAY 1/16 8P 33 OHM 3216 4 RA30 HRTS8E330J R CHIP ARRAY 1/16 8P 33 OHM 3216 4 RA31 HRTS8E330J R CHIP ARRAY 1/16 8P 33 OHM 3216 4 RA32 HRTS8E330J R CHIP ARRAY 1/16 8P 33 OHM 3216 4 RA33...
  • Page 69 LEVEL PART-CODE PART-NAME PART-DESC 3 CN2A 99707A0024 CONN AS 35164+YDH200+2464#24=150 3 CN4A 9970750037 CONN AS 5264+35164+2464#24=135 3 CN6A 9979200203 CONN WAFER YW396-03AV 3 D801 DD3SBA60-- DIODE D3SBA60 3 D811 PCHCSWJ184 HEAT SINK C AS CML-700C 4 00010 9977031900 HEAT SINK 319 AL T=2.0 4 00020 9976012700 SCREW SPECIAL...
  • Page 70 LEVEL PART-CODE PART-NAME PART-DESC 5 Z5040 PCSMJAJ198 PCB POWER AXIAL AS CML-700CAV 6 B801 5PB13857-- COIL BEAD BI3857(AXIAL) 6 D802 DUG2D----- DIODE UG2D 200V 2A 6 D805 DZN4148--- DIODE 1N4148 AUTO 52MM 6 D807 DUF4007--- DIODE UF4007 6 D809 DUG2D----- DIODE UG2D 200V 2A 6 DZ803 DDZ22BM---...
  • Page 71 LEVEL PART-CODE PART-NAME PART-DESC 6 R841 RD-AZ102J- R CARBON FILM 1/6 1K OHM J 6 R854 RD-AZ102J- R CARBON FILM 1/6 1K OHM J 6 R855 RD-4Z512J- R CARBON FILM 1/4 5.1K OHM J 2 Z2050 PCDSSWJ184 PCB D-SUB AS CML-700CAV 3 CA601 99707C0017 CONN AS...
  • Page 72 LEVEL PART-CODE PART-NAME PART-DESC 4 D608 DRLS4148-- DIODE CHIP RLS4148 4 DZ601 DRLZ5R6B-B DIODE CHIP ZENER RLZTE-11 5.6B 4 DZ602 DRLZ5R6B-B DIODE CHIP ZENER RLZTE-11 5.6B 4 DZ603 DRLZ5R6B-B DIODE CHIP ZENER RLZTE-11 5.6B 4 DZ604 DRLZ5R6B-B DIODE CHIP ZENER RLZTE-11 5.6B 4 DZ605 DRLZ5R6B-B DIODE CHIP ZENER...

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