Daewoo 710B - Manuals

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 connec...

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 s...

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 thenbent flat against the circuit foil. When holes are slotted, the following technique should be used to remove andreplace ...

6 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. Solder each device lead, and clip off excess...

GENERAL INFORMATION 7 This color monitor automatically scans all horizontal frequencies from 30KHz to 69KHz, and all verticalfrequencies from 50Hz to 160Hz. This color monitor adopted the OSD (On Screen Display), it shows the syncpolarity and frequency and it provides that easily adjust control. Thi...

PIN CONNECTOR CAUTIONS FOR ADJUSTMENT AND REPAIR • 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 w...

OPERATION & 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 darkareas on the screen.Range : 0-100% Adjust the brightness of the entire display. Adjust the position of the display horiz...

14 Self Diagnosis No Signal screen is displayed when the D-Sub signal connector is notconnected or the status of the monitor is on DPMS mode. Out of Range screen is displayed when the applied frequency isunder or over normal range. Normal range H : 30-69 KHzV : 50-160 Hz When the monitor doesn’t dis...

TROUBLESHOOTING HINTS 15 1. No Character Are the Contrast & Brightness Controls maximum Change the Contrast &Brightness control tomaximum No Raster Refer toNo Raster Check the peripheral circuitof CRT Board Check the video outputcircuit and IC803 (pin 1, 3, 5)and their ambient circuit Troubl...

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 ambientcircuit). Trouble in IC501 Trouble in Horizontal output circuit (No Raster Yes No Is the Collector wave form of ...

27 10. High Voltage Circuit Trouble in Q574 or FBT Is Q574 base waveform normal? Yes Yes Trouble in Q572, Q57312V 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 supp...

31 ALIGNMENT PROCEDURE Standard Adjustment Conditions 1. Power source voltage : AC 120V, 60Hz./AC 220V, 50Hz2. Aging : Take at least 20 minutes warm-up time.3. Signals. Video : Analog 0.7Vpp 75 terminal positive polaritySynchronizing : TTL level Negative/Positive Separate/CompositeDeflection frequen...

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 VIDEOPREAMP EEPROM24C08B 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 ...

RESISTOR Description Example: CAPACITOR 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 ...

LOC PART-CODE PART-NAME PART-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 C...

Serv ce Manual DAEWOO ELECTRONICS CO., L T D OVERSEAS SER VICE DEPT . DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPOGU,SEOUL, KOREA.C.P.O. BOX 8003 SEOUL KOREATELEX: DWELEC K28177-8CABLE: "DAEWOOELEC" http://www.dwe.co.kr PRINTED DATE: NOV.1998