Daewoo 531B-3 Service Manual Download Page 1

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XGA COLOR MONITOR

Model : 531X-3/532X-3

531B-3/532B-3

http://www.lucoms.com Nov., 2003

Service Manual

DAEWOO LUCOMS CO., LTD.

Summary of Contents for 531B-3

Page 1: ...XGA COLOR MONITOR Model 531X 3 532X 3 531B 3 532B 3 http www lucoms com Nov 2003 Service Manual DAEWOO LUCOMS CO LTD...

Page 2: ...NOTICE There are special components used in this analog color display which are important for safety These parts are shaded on the schematic diagram and on the replacement parts list It is essential t...

Page 3: ...be Do not test high voltage by drawing an arc 3 Discharge the picture tube anode only by a first connecting one end of an insulated clip lead to the degaussing or line grounding system shield at the p...

Page 4: ...ate gauge of RMA resin core solder composed of 60 parts tin 40 parts lead 3 Keep the soldering iron tip clean 4 Throughly clean the surface to be soldered Use a small wire bristle 0 5 inch or 1 25cm b...

Page 5: ...heatsink Diode Removal Replacement 1 Remove defective diode by clipping its leads as close as possible to diode body 2 Bend the two remaining leads perpendicularly to the circuit board 3 Observing dio...

Page 6: ...ation or function Reform the leadwire after any repair work Caution For Servicing In case of servicing or replacing CRT high voltage sometimes remains in the anode of the CRT Completely discharge high...

Page 7: ...concave margins Adjust the trapezoid of the screen by moving the lines inward or outward PINCUSHION TRAPEZOID Adjust the parallelogram when the screen is leaning left or right PARALLELOGRAM Adjust the...

Page 8: ...ceive the cross hatch pattern of factory preset mode b Pincushion Trapezoid Pin Balance Parallelogram 5 White Balance Adjustment a Select 9300 K on the OSD Menu b Receive a full white pattern of 54KHz...

Page 9: ...gnal normal Trouble in IC801 and its ambient circuit Are the Contrast Brightness Controls in OSD menu maximum 6 Static Convergence Adjustment a Apply a magenta cross hatch pattern on display b Adjust...

Page 10: ...BK About 40V p p 0 7Vpp 2 No Raster Trouble in power supply circuit Trouble in power supply circuit Trouble in G1 line of main PWA Trouble in FBT or its pin4 ambient circuit High Voltage trouble in F...

Page 11: ...in Q505 and its ambient circuit 3V 0V 50V Is the Drain waveform of Q507 normal Trouble in 50V Trouble in Q503 Q506 0V 0V 140V 4 Abnormal OSD Font Is menu key selected Is OSD Font exist If menu key se...

Page 12: ...d its ambient circuit Yes Check the IC501 and its ambient circuit 50Vp p 40V 10V 6 Unstable Picture 6 1 Horizontal Unstable picture Is the pulse of pin 1 of the IC501 correct Trouble in IC501 or its a...

Page 13: ...ergence on the fringe area bad Adjust static convergence Refer to Adjustment procedure of convergence Yes Adjust D Y Location Yes No Poor convergence 7 Focus Monitor remains unfocused Check Focus VR i...

Page 14: ...ture 9 1 Horizontal Size Trouble in L504 C520 or their ambient circuit Trouble in Horizontal output circuit Check the B and anode voltage of CRT Trouble in H OSC Deflection Circuit Refer to Horizontal...

Page 15: ...rect Trouble in T001 or D130 No Trouble in P S U Is power switch on Switch on No Yes Yes Yes Yes Yes Yes Is voltage of C130 80Vdc Trouble in T001 or D131 No Is fuse F001 O K Check the power cord outle...

Page 16: ...BLOCK DIAGRAM Is voltage of C135 8Vdc Trouble in D132 No Is voltage of C136 14Vdc No Yes Yes Yes Is voltage of C137 13Vdc Trouble in D134 or vertical part P S U O K Trouble in D133 or horizontal part...

Page 17: ...SCHEMATIC DIAGRAM Power Connection Section 531X 3 30...

Page 18: ...Video Section 531X 3 31...

Page 19: ...Horizontal Section 531X 3 32...

Page 20: ...33 Power Connection Section 531B 3...

Page 21: ...34 Video Section 531B 3...

Page 22: ...35 Horizontal Section 531B 3...

Page 23: ...EXPLODED VIEW DIAGRAM 36...

Page 24: ...25pF D 0 5 F 1pF J 5 K 10 P 100 0 Z 80 Fig Part No Description Index R101 Resistors RD 4Z820J Carbon 82J R102 RD 4Z201J Carbon1 4W 200J Allowance F 1 J 5 K 10 M 20 G 2 INFORMATION OF PART DESCRIPTION...

Page 25: ...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 LOC PART COD...

Page 26: ...2 DDZ5R6BM DIODE ZENER DZ5 6BM DZ203 DDZ5R6BM DIODE ZENER DZ5 6BM DZ204 DDZ5R6BM DIODE ZENER DZ5 6BM DZ205 DDZ5R6BM DIODE ZENER DZ5 6BM DZ210 DDZ5R6BM DIODE ZENER DZ5 6BM DZ211 DDZ5R6BM DIODE ZENER DZ...

Page 27: ...3J R CARBON FILM 1 6 12K OHM J R539 RN AZ1203F R METAL FILM 1 6 120 0K OHM F R540 RD 2Z229J R CARBON FILM 1 2 2 2 OHM J R541 RD AZ153J R CARBON FILM 1 6 15K OHM J R542 RD AZ182J R CARBON FILM 1 6 1 8K...

Page 28: ...224J C MYLAR MPP 250V 0 22MF J C534 CMXM2A472J C MYLAR 100V 4700PF J TP C701 CEXF1H479V C ELECTRO 50V RSS 4 7MF 5X11 TP C702 CCXF1H104Z C CERA 50V F 0 1MF Z CA201 9970800068 CABLE SIGNAL AS 15P 2C DDC...

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