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Daewoo 710C Service Manual

Xga color monitor
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Service Manual
XGA COLOR MONITOR
Model : 710C
DAEWOO ELECTRONICS CO., LTD
OVERSEAS SERVICE DEPT.

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Summary of Contents for Daewoo 710C

  • Page 1 Service Manual XGA COLOR MONITOR Model : 710C DAEWOO ELECTRONICS CO., LTD OVERSEAS SERVICE DEPT.

  • Page 2: Electrostatically Sensitive (Es) Devices

    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 3 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 4: 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.

  • Page 5: General Information

    GENERAL INFORMATION This color monitor automatically scans all horizontal frequencies from 30KHz to 86KHz, 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. 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 6: Pin Connector

    PIN CONNECTOR Signal Green Blue GND - Red GND - Green GND - Blue Reserved 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 7: Operation And Adjustment

    OPERATION & ADJUSTMENT ADJUSTMENT KEY Launch OSD(On-Screen Display) menus Select the next function Increase the value of any selected function Decrease the value of any selected function...
  • Page 8 ADJUSTMENT PROCESS MENU R G B R G B SELECT BRIGHTNESS CONTRAST MENU MENU R G B R G B SELECT PINCUSHION TRAPEZOID MENU MENU R G B R G B SELECT RED GAIN COLOR TEMP. 9300 6550 MENU MENU R G B R G B TEST...
  • Page 9 OSD(On-Screen Display) Menu 1 Adjust the contrast of image, the difference between light and dark areas on the screen. CONTRAST Range : 0-100% Adjust the brightness of the entire display. BRIGHTNESS Adjust the position of the display horizontally H . POSITION (left or right).
  • Page 10 OSD(On-Screen Display) Menu 2 Adjust the left and right margins for more convex or more concave margins. • PINCUSHION Image turns to • Image turns to Adjust the trapezoid of the screen by moving the lines inward or outward. • Image turns to TRAPEZOID •...
  • Page 11 OSD(On-Screen Display) Menu 3 Choose different preset color temperatures or set your own customized COLOR TEMP. color parameters. 9300 6550 Adjust the red gain. RED GAIN Adjust the green gain. GREEN GAIN Adjust the blue gain. BLUE GAIN Adjust the red bias. RED BIAS Adjust the green bias.

  • Page 12: Self Diagnosis

    OSD(On-Screen Display) Menu 4 Display horizontal & vertical frequency and polarity. STATUS 31 5KH 70 5 H Display a RGB Color Bar to determine whether the screen color is TEST PATTERN expressed normally or not. YES : VESA DPMS operation. POWER SAVER NO : NO DPMS operation.

  • Page 13: Troubleshooting Hints

    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 signal level Rk, Gk, Bk...
  • Page 14 2. No Raster No Raster Is Heater Is CRT Trouble in Voltage (CRT PWB) heater red-hot? about 6V? Trouble in Turn the Brightness Refer to trouble in & Contrast control power supply power supply unit. fully Maximum circuit Is whole Trouble in power screen bright? supply circuit...
  • Page 15 3. A missing Color One color is missing Is input signal Check video signal normal? cable or video card. 0.7Vpp Is the output of pre-amp Trouble in IC801 or its (IC801, KA2500) ambient circuit pin 21, 24, 26 all normal? Is video Trouble in Cathode (Rk, Gk, Bk)
  • Page 16 4. Abnormal OSD Font Abnormal OSD Font * If menu key selected. Is menu Is Heater Trouble in key selected? Voltage (CRT PWB) Heater voltage Is OSD Font about 6V? line. exist? Refer to trouble in P.S.U One color is Troubie in missing IC802 or its...

  • Page 17: Horizontal Output Circuit

    5. Horizontal Output Circuit Trouble in Horizontal output circuit Trouble in Step Down Circuit Is the (Check the Step Down of IC501, drain waveform of 210V Check Q510 and its ambient Q510 normal? circuit). Is the H-out waveform of IC501 Trouble in IC501 normal? Are the Collector...

  • Page 18: Unstable Picture

    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 4 of IC501 C505, R503 Trouble in IC501...
  • Page 19 6-2. V.OSC/Deflection Circuit Unstable or Abnormal picture ± 12Vdc line Trouble in power supply unit correct? the output 45Vpp V.DY waveform of IC401 failure (pin 6) normal? Is the output pulse Trouble in IC401 or of IC501 (pin 23) its ambient circuit normal? Trouble in V.Sync line or IC501 failure.
  • Page 20 7. Focus Monitor remains unfocused Adjust finely Focus VR in focus acceptable? Trouble in Focus circuit (FBT)

  • Page 21: Dynamic Focus

    7-1. Dynamic Focus * Check after adjusting the static focus Focus is poor : 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 2.
  • Page 22 8. Convergence Poor convergence convergence Adjust static on the center area convergence bad? Refer to Adjustment procedure of convergence Adjust D.Y convergence on the Location fringe area bad?
  • Page 23 9. Abnormal Picture 9-1. Horizontal Size Abnormal H.Size Is the H.Size 1.Check B+ section of TDA9110 about 295mm and its ambient circuit. at VGA mode and 2.Check IC503 and its ambient Min. H.Size circuit. on OSD Menu? It isn't out of order.

  • Page 24: Vertical Size

    9-2. Vertical Size Abnormal V.Size Check the IC401 changeable the changeable the DC DC voltage of and its level of pin 23 of IC401 pin 1? ambient circuit the IC501? Trouble V.OSC/ Check the IC501 and Deflection Circuit its ambient circuit Refer to V.OSC/Deflection circuit...

  • Page 25: High Voltage Circuit

    10. High Voltage Circuit Trouble in H.V circuit (No Raster) Trouble in power B+(210V) line supply circuit voltage normal? Is Q602 Trouble in Q602 or FBT base waveform normal? Is Q601 Trouble in Q612, Q613 collector waveform 12V Line normal? Is Q503 emitter waveform Trouble in Q601...
  • Page 26 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 24 Check Q501 or waveform of IC501 its ambient circuit. correct ? Is the Check IC501 or waveform of IC501 its ambient circuit.

  • Page 27: Power Supply Unit (Psu)

    12. Power Supply Unit (P.S.U) Trouble in P.S.U power switch Switch on Check the power cord outlet fuse F001 and IC001, D004, BD001 O.K? Is the voltage of IC001 Replace DZ001, Q001, pin 4 Q002 and D003 more than 14.5V? Trouble in TH001, C014, voltage of T001 BD001, D003, D004,...
  • Page 28 Is voltage Trouble in D105, D106, of C115 IC102, IC103, IC701 12Vdc? or horizontal Part. Is voltage Trouble in D107, IC104 of C116 or vertical Part. -12Vdc? Is voltage of C124 Trouble in D109 or CRT 8.7Vdc? P.S.U O.K...

  • Page 29: Alignment Procedure

    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 - 86KHz Vertical Frequency : 50Hz - 160Hz...
  • Page 30 (k) Repeat (c),(d),(e),(f),(g). Just a difference from 9300°K mode is color coordinates. Set color coordinates in X=0.313, Y=0.329 6. Static Convergence Adjustment (a) Apply an 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.

  • Page 34: 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 35: Electrical Parts List

    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. PART-CODE PART-NAME PART-DESC 00001 9979800464 PCB MAIN T1.6*246*330 00001 9979800465 PCB CRT T1.6*136*105 B002...
  • Page 36 PART-CODE PART-NAME PART-DESC C119 CMXL2D104J C MYLAR MEU 200V 0.1MF J(TP) C120 CEXF2A470V C ELECTRO 100V RSS 47MF (10X16) TP C123 CMXM2A472J C MYLAR 100V 4700PF J (TP) C124 CEXF1C471V C ELECTRO 16V RSS 470MF (10X12.5)TP C130 CH1FDF472M C CERA AC HIKB AC400V 4700PF M C140 CCZF1H104Z...
  • Page 37 PART-CODE PART-NAME PART-DESC C517 CXCH1H120J C CERA 50V CH 12PF J (TAPPING) C518 CEXF1H470V C ELECTRO 50V RSS 47MF (6.3X11) TP C519 CMXM2A473J C MYLAR 100V 0.047MF J (TP) C520 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C521 CCZF1H104Z C CERA 50V HIKF 0.1MF Z C522...
  • Page 38 PART-CODE PART-NAME PART-DESC C577 CCZF1H104Z C CERA 50V HIKF 0.1MF Z C578 CEXF1E221V C ELECTRO 25V RSS 220MF (8X11.5) TP C579 CMXB2A122G C MYLAR EU 100V 1200PF G C581 CZCH1H390J C CERA CH 50V 39PF J AXIAL 52MM C582 CCZB1H391K C CERA 50V B 390PF K C583...
  • Page 39 PART-CODE PART-NAME PART-DESC C628 CMXL2A224J C MYLAR 100V MEU 0.22MF J C631 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C632 CEXD1H100F C ELECTRO 50V RND 10MF (8X11.5) TP C641 CEXD1E220F C ELECTRO 25V RND 22MF 6.3*11(TP) C642 CEXF1C331V C ELECTRO 16V RSS 330MF (8X11.5) TP C701 CCZF1H103Z...
  • Page 40 PART-CODE PART-NAME PART-DESC C852 CMXM2A103J C MYLAR 100V 0.01MF J (TP) C853 HCZK104ZCA C CHIP CERA Z5U 50V 0.1MF Z 2012 C854 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C857 HCZK104ZCA C CHIP CERA Z5U 50V 0.1MF Z 2012 C858 CEXF1H100V C ELECTRO...
  • Page 41 PART-CODE PART-NAME PART-DESC D001 DZN4148—- DIODE 1N4148 AUTO 52MM D002 D1N4937GP- DIODE 1N4937GP (TAPPING) D003 D1N4937GP- DIODE 1N4937GP (TAPPING) D004 DRU1P——- DIODE RU 1P (TAPPING) D008 D1N4937GP- DIODE 1N4937GP (TAPPING) D101 DS3L60—— DIODE S3L60 D102 DS3L60—— DIODE S3L60 D104 DRG2AV1—- DIODE RG2AV1 D105...
  • Page 42 PART-CODE PART-NAME PART-DESC D604 D1NS4——- DIODE 1NS4 D605 DZN4148—- DIODE 1N4148 AUTO 52MM D606 DZN4148—- DIODE 1N4148 AUTO 52MM D607 DZN4148—- DIODE 1N4148 AUTO 52MM D611 DS2L60—-R DIODE S2L60 D614 DRU1P——- DIODE RU 1P (TAPPING) D643 DZN4148—- DIODE 1N4148 AUTO 52MM D644 DZN4148—- DIODE...
  • Page 43 PART-CODE PART-NAME PART-DESC DZ703 DGDZJ5R6B- DIODE ZENER GDZJ 5.6B DZ704 DGDZJ5R6B- DIODE ZENER GDZJ 5.6B DZ705 DGDZJ5R6B- DIODE ZENER GDZJ 5.6B DZ706 DGDZJ5R6B- DIODE ZENER GDZJ 5.6B DZ707 DGDZJ5R6B- DIODE ZENER GDZJ 5.6B DZ851 DGDZJ5R6B- DIODE ZENER GDZJ 5.6B DZ852 DGDZJ5R6B- DIODE ZENER GDZJ 5.6B...
  • Page 44 PART-CODE PART-NAME PART-DESC LED01 DAL151RGW- AL-151RGW LF001 5PDLF3060L FILTER LINE DLF-3060L P001 9979500010 RECEPTACLE 03ME3D/ FILTER EMI P101 4857417500 TERM PIN DA-IB0214(D2.3/DY PIN) P102 4857417500 TERM PIN DA-IB0214(D2.3/DY PIN) P501 4857417500 TERM PIN DA-IB0214(D2.3/DY PIN) P502 4857417500 TERM PIN DA-IB0214(D2.3/DY PIN) P503 4857417500 TERM PIN...
  • Page 45 PART-CODE PART-NAME PART-DESC Q515 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q516 T1RF640—- IRF640 Q518 T1RF640—- IRF640 Q520 T1RF640—- IRF640 Q522 T1RF640—- IRF640 Q530 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) Q532 T2N3904—- 2N3904 Q533 TZTA1270Y- KTA1270Y(AUTO)(562Y) Q601 T2N3904—- 2N3904 Q602 T2SK2847— 2SK2847 Q603 TZTA1270Y- KTA1270Y(AUTO)(562Y) Q604 TZTC3202Y- KTC3202Y (AUTO)(1959Y) Q605 T2N3904—-...
  • Page 46 PART-CODE PART-NAME PART-DESC R008 RD-4Z100J- R CARBON FILM 1/4 10 OHM J R009 RS01Z333J- R M-OXIDE FILM 1W 33K OHM J (TAPPING) R010 RS02Z473J- R M-OXIDE FILM 2W 47K OHM J (TAPPING) R011 RD-2Z105J- R CARBON FILM 1/2 1M OHM J R012 RD-2Z105J- R CARBON FILM...
  • Page 47 PART-CODE PART-NAME PART-DESC R409 RD-AZ153J- R CARBON FILM 1/6 15K OHM J R411 RD-AZ432J- R CARBON FILM 1/6 4.3K OHM J R412 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R413 RD-4Z471J- R CARBON FILM 1/4 470 OHM J R414 RD-AZ152J- R CARBON FILM 1/6 1.5K OHM J...
  • Page 48 PART-CODE PART-NAME PART-DESC R531 RD-4Z152J- R CARBON FILM 1/4 1.5K OHM J R532 RS02Z229J- R M-OXIDE FILM 2W 2.2 OHM J(TAPPING) R533 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R534 RD-AZ512J- R CARBON FILM 1/6 5.1K OHM J R535 RD-AZ103J- R CARBON FILM 1/6 10K OHM J...
  • Page 49 PART-CODE PART-NAME PART-DESC R573 RS02Z309J- R M-OXIDE FILM 2W 3 OHM J (TAPPING) R574 RD-4Z561J- R CARBON FILM 1/4 560 OHM J R576 RD-2Z229J- R CARBON FILM 1/2 2.2 OHM J R577 RD-AZ512J- R CARBON FILM 1/6 5.1K OHM J R578 RD-AZ152J- R CARBON FILM...
  • Page 50 PART-CODE PART-NAME PART-DESC R615 RN-AZ4700F R METAL FILM 1/6 470.0 OHM F R616 RD-AZ122J- R CARBON FILM 1/6 1.2K OHM J R617 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R618 RD-AZ821J- R CARBON FILM 1/6 820 OHM J R619 RD-AZ473J- R CARBON FILM 1/6 47K OHM J...
  • Page 51 PART-CODE PART-NAME PART-DESC R684 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R685 RD-4Z433J- R CARBON FILM 1/4 43K OHM J R701 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R702 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R703 RD-AZ473J- R CARBON FILM 1/6 47K OHM J...
  • Page 52 PART-CODE PART-NAME PART-DESC R804 RD-AZ100J- R CARBON FILM 1/6 10 OHM J R806 RD-AZ181J- R CARBON FILM 1/6 180 OHM J R807 RC-2Z470J- R CARBON COMP 1/2 47 OHM J R808 RD-AZ330J- R CARBON FILM 1/6 33 OHM J R809 RD-AZ330J- R CARBON FILM 1/6 33 OHM J...
  • Page 53 PART-CODE PART-NAME PART-DESC R862 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R863 HRFT391JCA R CHIP 1/10 390 OHM J 2012 R864 RD-AZ100J- R CARBON FILM 1/6 10 OHM J R866 RD-AZ181J- R CARBON FILM 1/6 180 OHM J R867 RC-2Z470J- R CARBON COMP 1/2 47 OHM J...
  • Page 54 SW703 5S50101Z01 SW TACT KPT-1115VM 1C-1P SW704 5S50101Z01 SW TACT KPT-1115VM 1C-1P SW705 5S50101Z01 SW TACT KPT-1115VM 1C-1P T001 5RM0000092 TRANS SMPS DMT-710C T002 5RY0000004 TRANS SYNC DST-710C T501 5RH0000106 FFA76021U T501C 9970K00012 CORE FERRITE RING-23 T502 5RD0000039 TRANS DRIVE...

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