Daewoo 710B Service Manual
  1. Manuals
  2. Brands
  3. Daewoo Manuals
  4. Monitor
  5. 710B
  6. Service manual
Daewoo 710B Service Manual

Daewoo 710B Service Manual

Xga color monitor
Hide thumbs
Table of Contents

Advertisement

Quick Links

Service Manual
XGA COLOR MONITOR
Model : 710B
DAEWOO ELECTRONICS CO., LTD
OVERSEAS SERVICE DEPT.

Advertisement

Table of Contents
loading

Related Manuals for Daewoo 710B

Summary of Contents for Daewoo 710B

  • Page 1 Service Manual XGA COLOR MONITOR Model : 710B 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 OPERATION & ADJUSTMENT TROUBLESHOOTING HINTS ALIGNMENT PROCEDURE BLOCK DIAGRAM PCB LAYOUT SCHEMATIC DIAGRAM EXPLODED VIEW DIAGRAM REPLACEMENT PARTS LIST CIRCUIT BOARD ELECTRICAL PARTS LIST...

  • Page 3: Safety Precautions

    It is essential that these critical parts should be replaced with manufacturer’s specified parts to prevent 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 addendum, 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: 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

    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 9: General Information

    GENERAL INFORMATION This color monitor automatically scans all horizontal frequencies from 30KHz to 69KHz, 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 10: Pin Connector

    PIN CONNECTOR GND - Red GND - Green GND - Blue Reserved 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: Operation & 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 12 ADJUSTMENT PROCESS R G B CONTRAST R G B PINCUSHION R G B COLOR TEMP. 9300 6550 R G B STATUS H : +31.5KH V : +70.5 H When you choose the icon on the OSD window, you can exit the OSD screen. R G B BRIGHTNESS R G B...
  • Page 13 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). Adjust the display width (horizontal size).
  • Page 14 OSD(On-Screen Display) Menu 2 Adjust the left and right margins for more convex or more concave margins. • Image turns to • Image turns to Adjust the trapezoid of the screen by moving the lines inward or outward. TRAPEZOID • Image turns to •...
  • Page 15 OSD(On-Screen Display) Menu 3 Choose different preset color temperatures or set your own customized color parameters. 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 16 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 17: Troubleshooting Hints

    TROUBLESHOOTING HINTS 1. No Character No Character Are the Contrast & Brightness Controls maximum Is whole screen bright? Is CRT Cathode (Rk, Gk, Bk) signal level normal? Is the output signal of the (pin 21, 24, 26) pre-amp (IC801, KA2500) normal? Is 12V DC line normal?
  • Page 18 2. No Raster No Raster Is CRT heater red-hot? Turn the Brightness & Contrast control to set Maximum Is whole screen bright? Check G1 voltage about -40V? Is CRT G2 (screen) voltage about 500V? Is 80V DC line normal? Does turning the Brightness control counterclockwise make screen...
  • Page 19 3. A missing Color One color is missing Is input signal normal? 0.7Vpp Is the output of pre-amp (IC801, KA2500) pin 21, 24, 26 all normal? Cathode (Rk, Gk, Bk) is normal? Each grid (G1, G2) voltage normal? Replace CRT Check video signal cable or video card.
  • Page 20 4. Abnormal OSD Font Abnormal OSD Font Is menu key selected? Is OSD Font exist? One color is missing Is the output of IC802 (pin 13, 14, 15) normal? Refer to Missing Color * If menu key selected. Is Heater Voltage (CRT PWB) about 6V? Troubie in...
  • Page 21 5. Horizontal Output Circuit Trouble in Horizontal output circuit (No Raster Is the B+line voltage over 45V? Is the H-out waveform of IC501 normal? Is the Collector wave form of Q501 or Q502 normal? Is the Collector waveform of Q503 normal? Trouble in Q504 and its ambient circuit.
  • Page 22 6. Unstable Picture 6-1. Horizontal Unstable picture Is H.Sync input pin of IC501 correct? pin 3 of IC501 Trouble in IC501 Check H.Sync Out of Micom or its ambient circuits. Is the Check the value of C503, R502...
  • Page 23 6-2. V.OSC/Deflection Circuit 45Vp-p Unstable or Abnormal picture 13V DC line correct? the output waveform of IC401 (pin 6) normal? Is the output pulse of IC501 (pin 23) normal? Trouble in V.Sync line or IC501 failure. Trouble in power supply unit V.DY failure Trouble in IC401 or...
  • Page 24 7. Focus Monitor remains unfocused Check Focus VR in focus acceptable? Trouble in Focus circuit (FBT)

  • Page 25: Dynamic Focus

    7-1. Dynamic Focus PHILIPS : 440V 180V : 300V 120V SAMSUNG : 300V 120V waveform waveform 4.5V 0.8V Focus is poor Is the waveform of the DF pin in FBT correct? Is the cathode voltage of the D575 about 600V? Is the base voltage of the Q751 about...
  • Page 26 8. Convergence Poor convergence convergence on the center area bad? convergence on the fringe area bad? Adjust static convergence Adjust D.Y Location Refer to Adjustment procedure of convergence...

  • Page 27: Horizontal Size

    9. Abnormal Picture 9-1. Horizontal Size Abnormal the VR601 is changed, is the H.size changed? H.Size about 295mm at VGA mode and Min. H.Size in OSD Menu? It isn't out of order. H.Size When Check pin 15 of IC501 and its ambient circuit (D604, R605, R606, R607) Is the 1.Check B+ section of TDA9109...
  • Page 28 9-2. Vertical Size Abnormal V.Size changeable the DC voltage of IC401 pin 1? Trouble V.OSC/ Deflection Circuit Refer to V.OSC/Deflection circuit the 3.5Vdc of pin 23 of the IC501? Check the IC501 and its ambient circuit Check the IC401 and its ambient circuit...

  • Page 29: High Voltage Circuit

    10. High Voltage Circuit Trouble in H.V circuit (No Raster) B+(45V) line voltage normal? base waveform collector waveform emitter waveform pin 26 waveform pin 29 voltage input H.Sync Trouble in H.Sync Is Q574 normal? Is Q571 normal? Is Q501 normal? Is IC501 normal? Is IC501...
  • Page 30 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 waveform of IC501 waveform of IC501 Trouble in H.V Sync correct Is the pin 1, 2 Check IC501 or their ambient circuit (pin 14, 15, 16)
  • Page 31 12. Power Supply Unit (P.S.U) 400Vpp (620Vpp) Trouble in P.S.U power switch fuse F001 O.K? Is the voltage of IC001 pin 3 16V? voltage of T001 pin 6 130V (370V)? Is the waveform of IC001 pin 1correct? voltage of C103 45V DC? voltage of C101 80V DC?
  • Page 32 Is voltage of C104 13V DC? voltage of C105 -13V DC? Is voltage of C106 8.7V DC? P.S.U O.K Trouble in D104, IC102 or horizontal Part. Trouble in D105 or vertical Part. Trouble in D106 or Q103...

  • Page 33: 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 75 terminal positive polarity Synchronizing : TTL level Negative/Positive Separate/Composite Deflection frequency Horizontal Frequency : 30KHz - 69KHz Vertical Frequency : 50Hz - 160Hz...
  • Page 34 (l) Repeat (e),(f),(g),(h),(i),(j). 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 35: Block Diagram

    OSD IC LSC4525P2 (R.G.B) SCL SDA MICOM SDA SCL 68HC705BD32 SMPS CONTROL FILTER KA2S0880 (R.G.B) VIDEO PREAMP KA2500 BIAS(R.G.B) EEPROM V.DRV AMP 24C08B KA2142 TILT IC L272M H.OSC. & V.DRV TDA9109 120V,80V,45V 12V, –12V SMPS H.DRV TRANS CONTROL VIDEO OUTPUT LM2407T BIAS CONTROL H.VTG...

  • Page 36: Pcb Layout

    PCB LAYOUT Main PCB Component Side...
  • Page 37 Main PCB Solder Side...
  • Page 38 Video PCB Component Side Video PCB Solder Side...

  • Page 40: Exploded View Diagram

    EXPLODED VIEW DIAGRAM...

  • Page 41: 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 42: Circuit Board Electrical Parts List

    IC MICOM IC V-OUT IC H.OSC FILTER LINE COIL H-LINEARITY COIL CHOKE COIL CHOKE COIL CHOKE IC PHOTO COUPLER RECEPTACLE PART-DESC CMC-710B M41QAR361X124(E) 0.12*5*24+BL102NG=730 DG-710B CMC-710B SMH250-10+1007#24#28=160 SMH250-07+1007#24=220 4.3+35404-9002+1015#18=50 0.22MF 1J(UCVSNDF/SV)+Q/O 400V SMH 220MF (25.4*40) 1KV B 0.01MF K 100V RSS 470MF 16*31.5 MEU 100V 0.47MF J...
  • Page 43 HR-703V DC12V 1C-1P 1W 100K OHM J (TAPPING) S-23 1.5KV KPT-1115VM 1C-1P 15P+2C/DDC=1.5M (IVY) TP8D15 DWT-44A1 DST-603 DDT-710B CF1147DW2300 TDH-710B CMC-710B 50V Y5V 0.1MF Z 2012 50V Y5V 0.1MF Z 2012 50V CH 100PF J 2012 50V CH 100PF J 2012 50V Y5V 0.1MF Z 2012...
  • Page 44 PART-CODE C802 HCFK104ZCA C803 HCFK104ZCA C812 HCFK104ZCA C813 HCFK104ZCA C814 HCQK101JCA C815 HCQK101JCA C832 HCFK104ZCA C833 HCFK104ZCA C862 HCFK104ZCA C863 HCFK104ZCA C878 HCQK122JCA C879 HCQK122JCA C881 HCFK103ZCA C882 HCFK103ZCA C883 HCFK103ZCA C884 HCQK220JCA C885 HCQK220JCA R117 HRFT272JCA R205 HRFT472JCA R208 HRFT000JCA R209 HRFT472JCA...
  • Page 45 1/10 100 OHM J 2012 1/10 4.7K OHM J 2012 1/10 240K OHM J 2012 1/10 24K OHM J 2012 1/10 5.6K OHM J 2012 CMC-710B 5267-07A STICK TYPE 5267-06A STICK TYPE HIKB AC400V 222M HIKB AC400V 222M HIKB AC400V 222M...
  • Page 46 PART-CODE C531 CEXF1C102V C551 CMXF2D204J C552 CMXF2D184J C555 CMXF2D334J C574 CMXH3C102J C582 CEXF2A221V C584 CMXF2D564J C587 CEXF2G220D C588 CEXF2G220D C592 CEXF2C220V C605 CMXF2D474J C902 CMXF2D104J D001 D2A05----- D002 D2A05----- D003 D2A05----- D004 D2A05----- D005 D1N4937GP- D006 DHER107--- D101 DRU1P----- D105 DHER107--- D106 DHER107---...
  • Page 47 1W 100K OHM J (TAPPING) 1W 100K OHM J (TAPPING) 1W 100K OHM J (TAPPING) KPT-1115VM 1C-1P KPT-1115VM 1C-1P KPT-1115VM 1C-1P KPT-1115VM 1C-1P CCT 065AT 50K OHM B TAP CCT 063BT 2K OHM B TAP CMC-710B 50V RSS 100MF (8X11.5) TP...
  • Page 48 PART-CODE C011 CEXF1H109V C013 CEXF1H109V C014 CCXF1H223Z C105 CEXF1C101V C107 CCXF1H223Z C108 CEXF1C101V C109 CEXF1C101V C110 CEXF1C221V C111 CEXF1H100V C112 CMXM2A104J C114 CEXF1C101V C118 CCXB2H102K C202 CEXF1C101V C209 CCXB1H221K C210 CCXB1H221K C211 CEXF1H100V C266 CMXM2A104J C267 CEXD1H220F C271 CEXF1H100V C276 CEXF1H100V C277 CEXF1H100V...
  • Page 49 PART-CODE C515 CMXM2A104J C516 CCXF1H104Z C517 CEXF2A100V C518 CMXM2A104J C525 CEXF1H100V C528 CEXF1H229V C533 CEXF1C101V C554 CCXB2H102K C556 CMXM2A104J C570 CEXF1H100V C572 CEXF1C221V C573 CEXF1C101V C577 CMXM2A562J C579 CEXF1C470V C580 CEXF1C101V C583 CCXB2H471K C586 CEXF1H100V C591 CMXM2A104J C593 CEXF1H339V C601 CEXF1H109V C603 CCXB2H102K...
  • Page 50 KSR1006 (AUTO) KSR1006 (AUTO) KSR1006 (AUTO) KSR1006 (AUTO) 2N3904 KSD471ACY KSA539CY KSD471ACY KSA539CY KSD471ACY KSP45 KSP92 KSP92 KSP45 KSP45 KSP45 KSR1006 (AUTO) KSA910Y KSC945C-Y (AUTO) KSD471ACY KSA539CY KSR1009 HC-49/S 6MHZ 22PF 30PPM CMC-710B T1.6*330*246 BI3857(AXIAL) BI3857(AXIAL) BI3857(AXIAL) BI3857(AXIAL) BI3857(AXIAL) BI3857(AXIAL)
  • Page 51 PART-CODE B881 5PB13857-- C009 CCZB1H102K C201 CCZB1H181K C207 CCZB1H221K C208 CCZB1H221K C214 CCZF1H104Z C246 CCZF1H104Z C501 CCZB1H101K C524 CCZB1H471K C534 CCZF1H104Z C548 CCZB1H181K C571 CCZB1H471K C575 CCZB1H103K C576 CCZB1H102K C752 CCZF1H104Z C903 CCZB1H103K C941 CCZB1H102K C994 CCZF1H104Z C995 CCZF1H104Z C997 CCZB1H152K C999 CCZF1H104Z...
  • Page 52 PART-CODE D572 DZN4148--- D574 DZN4148--- D578 DFDH400--- D601 DZN4148--- D604 DZN4148--- D751 DZN4148--- D752 DZN4148--- D753 DZN4148--- D754 DZN4148--- D755 DZN4148--- D756 DZN4148--- D757 DZN4148--- D801 DZN4148--- D802 DZN4148--- D831 DZN4148--- D832 DZN4148--- D861 DZN4148--- D862 DZN4148--- D901 DZN4148--- D902 DZN4148--- D912 DZN4148---...
  • Page 53 PART-CODE R212 RN-AZ9091F R213 RN-AZ8252F R214 RN-AZ1502F R215 RN-AZ3012F R226 RD-AZ101J- R227 RD-AZ101J- R229 RD-AZ222J- R230 RD-AZ222J- R231 RD-AZ222J- R232 RD-AZ750J- R241 RD-AZ472J- R249 RD-AZ101J- R250 RD-AZ101J- R281 RD-AZ472J- R282 RD-AZ472J- R283 RD-AZ472J- R293 RD-AZ122J- R294 RD-AZ563J- R295 RD-AZ331J- R296 RD-AZ331J- R401 RD-AZ102J-...
  • Page 54 PART-CODE R522 RD-AZ203J- R524 RD-4Z101J- R525 RD-4Z121J- R526 RD-AZ473J- R527 RD-4Z433J- R533 RD-AZ472J- R535 RD-AZ473J- R541 RD-AZ331J- R543 RD-AZ331J- R545 RD-AZ331J- R551 RD-4Z100J- R552 RD-AZ473J- R553 RD-AZ102J- R556 RD-AZ109J- R557 RD-AZ102J- R558 RD-AZ102J- R559 RD-AZ102J- R560 RD-AZ472J- R561 RD-AZ472J- R562 RD-AZ472J- R571 RD-4Z471J-...
  • Page 55 PART-CODE R607 RD-AZ153J- R611 RD-AZ103J- R751 RD-AZ153J- R752 RD-AZ332J- R758 RD-2Z202J- R759 RD-2Z202J- R802 RD-AZ101J- R803 RD-AZ330J- R814 RD-AZ100J- R832 RD-AZ101J- R833 RD-AZ330J- R844 RD-AZ100J- R855 RD-AZ472J- R862 RD-AZ101J- R863 RD-AZ330J- R874 RD-AZ100J- R881 RD-AZ472J- R902 RD-AZ154J- R903 RD-AZ623J- R904 RD-AZ472J- R905 RD-AZ752J-...
  • Page 56 C CERA C CERA C ELECTRO PCB CRT AXIAL AS PART-DESC 1/6 470 OHM J 1/6 43K OHM J 1/0.52 TIN COATING CMC-710B 1015#18+35068-9812=110 1015#18+35068-9812=110 033 0 7700 44 SMAW250-10 (ANGLE) SMAW250-07 (ANGLE) 100V 0.22MF J HIKE 2KV 0.01MF P 2KV B 470PF K (TAPPING) 1015#18+4.3PIEX2=160...
  • Page 57 PART-CODE B0001 9979800463 B803 5PB13857-- B805 5PB13857-- B811 5PB13857-- B812 5PB13857-- B813 5PB13857-- B814 5PB13857-- B859 5PB13857-- B863 5PB13857-- B864 5PB13857-- D803 DFDH400--- D804 DFDH400--- D805 DFDH400--- D833 DFDH400--- D834 DFDH400--- D835 DFDH400--- D863 DFDH400--- D864 DFDH400--- D865 DFDH400--- L801 5CPZ568K02 L831 5CPZ568K02...
  • Page 58 PART-CODE R864 RD-4Z271J- R865 RD-4Z101J- R867 RC-2Z470J- R868 RD-AZ133J- R869 RD-AZ683J- R870 RD-AZ224J- R871 RD-AZ154J- R872 RD-AZ474J- R882 RD-2Z104J- R891 RD-4Z562J- R892 RD-4Z564J- R893 RD-AZ103J- SG801 DWSP201M-- SG831 DWSP201M-- SG861 DWSP201M-- PART-NAME R CARBON FILM R CARBON FILM R CARBON COMP R CARBON FILM R CARBON FILM R CARBON FILM...
  • Page 59 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPOGU, SEOUL, KOREA. C.P.O. BOX 8003 SEOUL KOREA TELEX: DWELEC K28177-8 CABLE: "DAEWOOELEC" http://www.dwe.co.kr PRINTED DATE: NOV.1998...

Table of Contents