Instruction/ maintenance manual of the product 710B Daewoo
Go to page of 59
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 &am.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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 ci.
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.
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.
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.
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).
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.
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.
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.
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.
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.
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.
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 wavef.
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.
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.
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.
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.
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 .
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.
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 .
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.
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-TS.
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.
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.
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.
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 TER.
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.
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.
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.
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.
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 DZN.
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.
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.
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.
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.
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(A.
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 CARBO.
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 .
An important point after buying a device Daewoo 710B (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Daewoo 710B yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Daewoo 710B - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Daewoo 710B you will learn all the available features of the product, as well as information on its operation. The information that you get Daewoo 710B will certainly help you make a decision on the purchase.
If you already are a holder of Daewoo 710B, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Daewoo 710B.
However, one of the most important roles played by the user manual is to help in solving problems with Daewoo 710B. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Daewoo 710B along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
