Daewoo 710B manual

Service Manual XGA COLOR MONIT OR Model : 710B DAEWOO ELECTRONICS CO., L TD OVERSEAS SER VICE DEPT .[...]

CONTENTS SAFETY PRECAUTIONS 1 GENERAL SAFETY INFORMA TION 2 SERVICING PRECAUTIONS 3 TECHNICAL INFORMA TION 6 GENERAL INFORMA TION 7 PIN CONNECTOR 8 CAUTIONS FOR ADJUSTMENT AND REP AIR 8 OPERA TION & ADJUSTMENT 9 TROUBLESHOOTING HINTS 15 ALIGNMENT PROCEDURE 31 BLOCK DIAGRAM 33 PCB LA YOUT 34 SCHEMA TIC DIAGRAM 37 EXPLODED VIEW DIAGRAM 38 REPLACE[...]

SAFETY PRECAUTIONS 1 Safety Check Care should be taken while servicing this analog color display because of the high voltages used in the deflection circuits. These voltages are exposed in such areas as the associated flyback and yoke circuits. Fire & Shock Hazard • Insert an isolation transformer between the analog color display and AC power[...]

GENERAL SAFETY INFORMA TION W arning : This product includes critical mechanical and electrical parts which are essential for x radiation safety . For continued safety , replace critical components indicated in the service manual only with exact replacement parts given in the parts list. Operating high voltage for this product is 29Kv at minimum br[...]

SERVICING PRECAUTIONS 3 General Servicing Precautions 1. Always unplug the AC power cord from the AC power source before: a. Removing or reinstalling any component, circuit board, module, or any other instrument assembly . b. Disconnecting or reconnecting any electrical plug or other electrical connection. c. Connecting a test substitute in paralle[...]

4 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. The followi[...]

5 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. When working with boards using the famil[...]

6 Power IC, T ransistor 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. Replace heatsink. Diode Removal/Rep[...]

GENERAL INFORMA TION 7 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/A T[...]

PIN CONNECTOR CAUTIONS FOR ADJUSTMENT AND REP AIR • Degaussing is always required when adjusting purity or convergence. • The white balance adjustment has been done by a color analyzer in factory . The adjustment procedure, described in the service manual is made by a visual check. • Allow 20 minutes warm-up time for the display before checki[...]

OPERA TION & ADJUSTMENT 9 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[...]

10 ADJUSTMENT PROCESS When you choose the icon on the OSD window , you can exit the OSD screen. BRIGHTNESS 50% TRAPEZOID 50% COLOR TEMP. K 9300 6550 RED GAIN K 50% RECALL YES Z Z Z NO CONTRAST 50% PINCUSHION 50% STATUS H : +31.5KH Z V : +70.5 H Z Z Z Z R G B R G B R G B R G B R G B R G B R G B R G B[...]

11 OSD(On-Screen Display) Menu 1 CONTRAST 50% BRIGHTNESS 50% H.POSITION 50% H.SIZE 50% V.POSITION 50% V.SIZE 50% Adjust the contrast of image, the difference between light and dark areas on the screen. Range : 0-100% Adjust the brightness of the entire display . Adjust the position of the display horizontally (left or right). Adjust the display wid[...]

12 OSD(On-Screen Display) Menu 2 TRAPEZOID 50% PIN BALANCE 50% V. MOIRE 50% PARALLELOGRAM 50% Adjust the left and right margins for more convex or more concave margins. • Image turns to by . • Image turns to by . - Adjust the trapezoid of the screen by moving the lines inward or outward. • Image turns to by . • Image turns to by . - Adjust [...]

13 OSD(On-Screen Display) Menu 3 OSD(On-Screen Display) Menu 4 RED GAIN 50% GREEN GAIN 50% BLUE GAIN 50% RED BIAS 50% GREEN BIAS 50% BLUE BIAS 50% Choose different preset color temperatures or set your own customized color parameters. Adjust the red gain. Adjust the green gain. Adjust the blue gain. Adjust the red bias. Adjust the green bias. Adjus[...]

14 Self Diagnosis No Signal screen is displayed when the D-Sub signal connector is not connected or the status of the monitor is on DPMS mode. Out of Range screen is displayed when the applied frequency is under or over normal range. Normal range H : 30-69 KHz V : 50-160 Hz When the monitor doesn’t display , if you press any key , Self Diagnosis [...]

TROUBLESHOOTING HINTS 15 1. No Character Are the Contrast & Brightness Controls maximum Change the Contrast & Brightness control to maximum No Raster Refer to No Raster Check the peripheral circuit of CRT Board Check the video output circuit and IC803 (pin 1, 3, 5) and their ambient circuit Trouble in 12V DC line of the Main PWB Check the c[...]

16 2. No Raster Trouble in power supply circuit Trouble in power supply circuit Trouble in G1 line of Main PWB Trouble in FBT High Voltage trouble in FBT Trouble in 80/ 120V DC line of power supply unit Refer to trouble in P,S,U Refer to trouble in power supply unit. Is CRT heater red-hot? No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Is Hea[...]

17 3. A missing Color Is input signal normal? One color is missing CRT Cathode (Rk, Gk, Bk) is normal? Is video output IC803 waveform normal? Each grid (G1, G2) voltage normal? Is the output of pre-amp (IC801, KA2500) pin 21, 24, 26 all normal? Check video signal cable or video card. Trouble in IC801 or its ambient circuit Trouble in video output c[...]

18 4. Abnormal OSD Font Is menu key selected? Is OSD Font exist? * If menu key selected. Is Heater Voltage (CRT PWB) about 6V? Abnormal OSD Font Is the output of IC802 (pin 13, 14, 15) normal? Trouble in Heater voltage line. Refer to trouble in P.S.U Troubie in IC802 or its ambient circuit Trouble in IC802 and its ambient circuit One color is missi[...]

19 5. Horizontal Output Circuit Is the B+line voltage over 45V? Is the H-out waveform of IC501 normal? Trouble in B+ Booster Circuit (Check the B+section of IC501, Check Q603 and its ambient circuit). Trouble in IC501 Trouble in Horizontal output circuit (No Raster Yes No Is the Collector wave form of Q501 or Q502 normal? Yes Yes Yes Trouble in Q50[...]

20 6. Unstable Picture 6-1. Horizontal Unstable picture Is H.Sync input pin of IC501 correct? Check H.Sync Out of Micom or its ambient circuits. Is the pin 3 of IC501 5V? Check the value of C503, R502 Yes Yes No No Trouble in IC501[...]

21 6-2. V .OSC/Deflection Circuit Unstable or Abnormal picture Is ± 13V DC line correct? Trouble in power supply unit No Yes Is the output waveform of IC401 (pin 6) normal? V.DY failure Trouble in V.Sync line or IC501 failure. Yes No 45Vp-p Is the output pulse of IC501 (pin 23) normal? Trouble in IC401 or its ambient circuit Yes No[...]

22 7. Focus Monitor remains unfocused Check Focus VR in FBT Is focus acceptable? Trouble in Focus circuit (FBT) Yes OK No[...]

23 7-1. Dynamic Focus Focus is poor Is the waveform of the DF pin in FBT correct? PHILIPS : 440V 180V NEC : 300V 120V SAMSUNG : 300V 120V 1. Check the CRT socket or connector wire 2. Trouble in FBT or CRT 1. Check the waveform of the pin 3 of FBT. 2. Check D575 1. Check the 12V DC line. 2. Check Q751,D755 * Check after adjusting the static focus fi[...]

24 8. Convergence Is convergence on the center area bad? Is convergence on the fringe area bad? Adjust static convergence Refer to Adjustment procedure of convergence Yes Adjust D.Y Location Yes No Poor convergence[...]

25 9. Abnormal Picture 9-1. Horizontal Size When the VR601 is changed, is the H.size changed? No Yes Check pin 15 of IC501 and its ambient circuit (D604, R605, R606, R607) It isn't out of order. Is the H.Size about 295mm at VGA mode and Min. H.Size in OSD Menu? No Yes 1.Check B+ section of TDA9109 and its ambient circuit. 2.Check Q601 and its [...]

26 9-2. V ertical Size Is changeable the DC voltage of IC401 pin 1? Check the IC401 and its ambient circuit Check the IC501 and its ambient circuit No No Trouble V.OSC/ Deflection Circuit Refer to V.OSC/Deflection circuit Yes Is the 3.5Vdc of pin 23 of the IC501? Yes Abnormal V.Size[...]

27 10. High V oltage Circuit Trouble in Q574 or FBT Is Q574 base waveform normal? Yes Yes Trouble in Q572, Q573 12V Line Is Q571 collector waveform normal? Yes No Trouble in Q571 Is Q501 emitter waveform normal? Yes No Trouble in Q501, Q502 Is IC501 pin 26 waveform normal? Yes No Trouble in power supply Is IC501 pin 29 voltage about 12V? No No Trou[...]

28 1 1. Side-Pincushion Circuit Side-Pincusion distortion is excessive or barrel O.K Select the side-pincushion icon on OSD menu, and adjust acceptable position. Yes Check IC501 or their ambient circuit (pin 14, 15, 16) Is the pin 24 waveform of IC501 correct Yes No Check IC501 or it's ambient circuit. Trouble in H.V Sync Is the waveform of IC[...]

29 12. Power Supply Unit (P .S.U) Is the voltage of IC001 pin 3 16V? Replace R004 Replace C005 No Is voltage of C101 80V DC? Trouble in D101 or Video Part No Is voltage of C113 120V DC? Trouble in D108 or Video Part No Is voltage of T001 pin 6 130V (370V)? Trouble in D001, D002, D003, D004, C004 and TH001. No Is the waveform of IC001 pin 1correct? [...]

30 Is voltage of C106 8.7V DC? Trouble in D106 or Q103 No Is voltage of C104 13V DC? No Yes Yes Yes Is voltage of C105 -13V DC? Trouble in D105 or vertical Part. P.S.U O.K Trouble in D104, IC102 or horizontal Part. No A[...]

31 ALIGNMENT PROCEDURE Standard Adjustment Conditions 1. Power source voltage : AC 120V , 60Hz./AC 220V , 50Hz 2. Aging : T ake 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 V e[...]

32 (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. (c) [...]

33 BLOCK DIAGRAM R OSD IC MICOM LSC4525P2 68HC705BD32 H.V SDA SCL H.V SDA 120V,80V,45V 12V, –12V SCL SCL SDA OSD VIDEO PREAMP EEPROM 24C08B TILT IC L272M V.DRV AMP V.DY VIDEO OUTPUT LM2407T BIAS CONTROL H.VTG SCREEN, FOCUS FBT CF1147DW2300 KA2142 H.OSC. & V.DRV TDA9109 SMPS TRANS H.DRV H.DY H.VTG B+ CONTROL KA7500B B+ CONTROL SMPS CONTROL FIL[...]

34 PCB LA YOUT Main PCB Component Side[...]

Main PCB Solder Side 35[...]

36 Video PCB Component Side Video PCB Solder Side[...]

[...]

EXPLODED VIEW DIAGRAM 38[...]

RESISTOR Description Example: CAP ACIT OR Description Example: Fig & Part No Description Index R101 Resistors RE-42820J Cabron: 82J Allowance F± 1 % J± 5 % K ± 10% M ± 20% G± 2 % Important Safety Notice Components identified with the International Symbol have special characteristics important for safety . When replacing any components, use[...]

LOC P AR T -CODE P AR T -NAME P AR T -DESC 10010 PCFMCAJ046 COVER FRONT AS CMC-710B CT801 9979617018 CDT M41QAR361X124(E) CT802 9970710176 CRT GND AS 0.12*5*24+BL102NG=730 DG001 5MG0000062 COIL DEGAUSSING DG-710B 20010 PCMPM1J046 PCB MAIN MANUAL AS CMC-710B CA801 99707A0016 CONN AS SMH250-10+1007#24#28=160 CA802 9970770019 CONN AS SMH250-07+1007#24[...]

41 LOC P AR T -CODE P AR T -NAME P AR T -DESC D504 DDTV32F--- DIODE DTV32F Q504 T2SC5387-- TR H.OUT 2SC5387 Q574 TKSC5386-- TR KSC5386 Q551 T1RF630A TS FET IRF630A-TSTU Q552 T1RF630A TS FET IRF630A-TSTU Q555 T1RF630A TS FET IRF630A-TSTU Q577 T2SK2799-- FET 2SK2799 Q603 T2SK2799-- FET 2SK2799 RL001 5SC0201103 SW RELA Y HR-CR323 2C-1P DC12V RL501 5SC[...]

42 LOC P AR T -CODE P AR T -NAME P AR T -DESC C802 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 C803 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 C812 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 C813 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 C814 HCQK101JCA C CHIP CERA 50V CH 100PF J 2012 C815 HCQK101JCA C CHIP CERA 50V CH 100PF J 2012 C832 HCFK104[...]

43 LOC P AR T -CODE P AR T -NAME P AR T -DESC R506 HRFT272JCA R CHIP 1/10 2.7K OHM J 2012 R508 HRFT472JCA R CHIP 1/10 4.7K OHM J 2012 R513 HRFT153JCA R CHIP 1/10 15K OHM J 2012 R515 HRFT105JCA R CHIP 1/10 1M OHM J 2012 R516 HRFT122JCA R CHIP 1/10 1.2K OHM J 2012 R517 HRFT103JCA R CHIP 1/10 10K OHM J 2012 R531 HRFT103JCA R CHIP 1/10 10K OHM J 2012 R[...]

44 LOC P AR T -CODE P AR T -NAME P AR T -DESC C531 CEXF1C102V C ELECTRO 16V RSS 1000MF (10X20) TP C551 CMXF2D204J C MYLAR MPP 200V 0.2MF J (TP) C552 CMXF2D184J C MYLAR MPP 200V 0.18MF J (TP) C555 CMXF2D334J C MYLAR 200V MPP 0.33MF J (TP) C574 CMXH3C102J C MYLAR 1.6KV BUP 1000PF J C582 CEXF2A221V C ELECTRO 100V RSS 220MF (16X25) TP C584 CMXF2D564J C[...]

45 LOC P AR T -CODE P AR T -NAME P AR T -DESC P401 9977410800 TERMINAL PIN BSP1(SN) L=15MM P402 9977410800 TERMINAL PIN BSP1(SN) L=15MM P403 9977410800 TERMINAL PIN BSP1(SN) L=15MM P501 9977410800 TERMINAL PIN BSP1(SN) L=15MM P502 9977410800 TERMINAL PIN BSP1(SN) L=15MM P503 9977410800 TERMINAL PIN BSP1(SN) L=15MM P504 9977410800 TERMINAL PIN BSP1([...]

46 LOC P AR T -CODE P AR T -NAME P AR T -DESC C011 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C013 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP C014 CCXF1H223Z C CERA 50V F 0.022MF Z (T APPING) C105 CEXF1C101V C ELECTRO 16V RSS 100MF (6.3X11) TP C107 CCXF1H223Z C CERA 50V F 0.022MF Z (T APPING) C108 CEXF1C101V C ELECTRO 16V RSS 100MF (6.3X11) TP C109[...]

47 LOC P AR T -CODE P AR T -NAME P AR T -DESC C515 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C516 CCXF1H104Z C CERA 50V F 0.1MF Z C517 CEXF2A100V C ELECTRO 100V RSS 10MF (6.3X11) TP C518 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C525 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C528 CEXF1H229V C ELECTRO 50V RSS 2.2MF (5X11) TP C533 CEXF1C101V C ELECTRO 16V RS[...]

48 LOC P AR T -CODE P AR T -NAME P AR T -DESC Q201 TKSD471ACY TR KSD471ACY Q202 TKSD471ACY TR KSD471ACY Q203 TZSR1006-- TR KSR1006 (AUTO) Q204 TZSR1006-- TR KSR1006 (AUTO) Q501 TKSD471ACY TR KSD471ACY Q502 TKSA539CY - TR KSA539CY Q516 TKSA539CY - TR KSA539CY Q517 TZSR1006-- TR KSR1006 (AUTO) Q525 TZT A1270Y - TR KT A1270Y(AUTO)(562Y) Q553 TZSR1006-[...]

49 LOC P AR T -CODE P AR T -NAME P AR T -DESC B881 5PB13857-- COIL BEAD BI3857(AXIAL) C009 CCZB1H102K C CERA 50V B 1000PF K C201 CCZB1H181K C CERA 50V B 180PF K C207 CCZB1H221K C CERA 50V B 220PF K C208 CCZB1H221K C CERA 50V B 220PF K C214 CCZF1H104Z C CERA 50V HIKF 0.1MF Z C246 CCZF1H104Z C CERA 50V HIKF 0.1MF Z C501 CCZB1H101K C CERA 50V B 100PF [...]

50 LOC P AR T -CODE P AR T -NAME P AR T -DESC D572 DZN4148--- DIODE 1N4148 AUTO 52MM D574 DZN4148--- DIODE 1N4148 AUTO 52MM D578 DFDH400--- DIODE FDH400 D601 DZN4148--- DIODE 1N4148 AUTO 52MM D604 DZN4148--- DIODE 1N4148 AUTO 52MM D751 DZN4148--- DIODE 1N4148 AUTO 52MM D752 DZN4148--- DIODE 1N4148 AUTO 52MM D753 DZN4148--- DIODE 1N4148 AUTO 52MM D7[...]

51 LOC P AR T -CODE P AR T -NAME P AR T -DESC R212 RN-AZ9091F R MET AL FILM 1/6 9.09K OHM F R213 RN-AZ8252F R MET AL FILM 1/6 82.5K OHM F R214 RN-AZ1502F R MET AL FILM 1/6 15K OHM F R215 RN-AZ3012F R MET AL FILM 1/6 30.1K OHM F R226 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R227 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R229 RD-AZ222J- R CARBON FILM 1/6 [...]

52 LOC P AR T -CODE P AR T -NAME P AR T -DESC R522 RD-AZ203J- R CARBON FILM 1/6 20K OHM J R524 RD-4Z101J- R CARBON FILM 1/4 100 OHM J R525 RD-4Z121J- R CARBON FILM 1/4 120 OHM J R526 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R527 RD-4Z433J- R CARBON FILM 1/4 43K OHM J R533 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R535 RD-AZ473J- R CARBON FILM 1/6 47K O[...]

53 LOC P AR T -CODE P AR T -NAME P AR T -DESC R607 RD-AZ153J- R CARBON FILM 1/6 15K OHM J R611 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R751 RD-AZ153J- R CARBON FILM 1/6 15K OHM J R752 RD-AZ332J- R CARBON FILM 1/6 3.3K OHM J R758 RD-2Z202J- R CARBON FILM 1/2 2K OHM J R759 RD-2Z202J- R CARBON FILM 1/2 2K OHM J R802 RD-AZ101J- R CARBON FILM 1/6 100 OHM[...]

54 LOC P AR T -CODE P AR T -NAME P AR T -DESC R998 RD-AZ471J- R CARBON FILM 1/6 470 OHM J R999 RD-AZ433J- R CARBON FILM 1/6 43K OHM J TP1 85801052GY WIRE COPPER 1/0.52 TIN COA TING 30020 PCCTSWJ046 PCB CRT AS CMC-710B CA804 9970710181 CONN AS 1015#18+35068-9812=110 CA805 9970710181 CONN AS 1015#18+35068-9812=110 CT801 9979300008 SOCKET CR T 033 0 7[...]

55 LOC P AR T -CODE P AR T -NAME P AR T -DESC B0001 9979800463 PCB VIDEO T1.6*244*246 B803 5PB13857-- COIL BEAD BI3857(AXIAL) B805 5PB13857-- COIL BEAD BI3857(AXIAL) B811 5PB13857-- COIL BEAD BI3857(AXIAL) B812 5PB13857-- COIL BEAD BI3857(AXIAL) B813 5PB13857-- COIL BEAD BI3857(AXIAL) B814 5PB13857-- COIL BEAD BI3857(AXIAL) B859 5PB13857-- COIL BEA[...]

56 LOC P AR T -CODE P AR T -NAME P AR T -DESC R864 RD-4Z271J- R CARBON FILM 1/4 270 OHM J R865 RD-4Z101J- R CARBON FILM 1/4 100 OHM J R867 RC-2Z470J- R CARBON COMP 1/2 47 OHM J R868 RD-AZ133J- R CARBON FILM 1/6 13K OHM J R869 RD-AZ683J- R CARBON FILM 1/6 68K OHM J R870 RD-AZ224J- R CARBON FILM 1/6 220K OHM J R871 RD-AZ154J- R CARBON FILM 1/6 150K O[...]

Serv ce Manual DAEWOO ELECTRONICS CO., L TD OVERSEAS SER VICE DEPT . DAEWOO ELECTRONICS CO., L TD 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 D A TE: NO V .1998[...]