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20

6. Unstable Picture

6-1. Horizontal

Unstable

picture

Is the

pulse of pin 26 of

the IC501

correct?

Trouble in IC501
or its ambient
circuit

Is the

pulse of pin 28 of

the IC201

correct?

Check IC501 and
its ambient circuit

No

No

No

Yes

Yes

Is the

input H.Sync

correct?

Check IC201 and
its ambient circuit

Yes

Trouble in Signal Cable
or 15P D-Sub Connector

5Vpp

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Содержание 531X

Страница 1: ...DAEWOO ELECTRONICS CO LTD http svc dwe co kr Service Manual XGA COLOR MONITOR Model 531X September 2000...

Страница 2: ...RMATION 6 GENERAL INFORMATION 7 PIN CONNECTOR 8 CAUTIONS FOR ADJUSTMENT AND REPAIR 8 OPERATION AND ADJUSTMENT 9 ALIGNMENT PROCEDURE 12 TROUBLESHOOTING HINTS 15 BLOCK DIAGRAM 29 PCB LAYOUT 30 SCHEMATIC...

Страница 3: ...ntial that these critical parts should be replaced with manufacturer s specified parts to prevent X Ray shock fire or other hazards Do not modify the original design without getting written permission...

Страница 4: ...ult 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 Statement...

Страница 5: ...o the contacts with a pipe cleaner cotton tipped stick or comparable nonabrasive applicator 10 by volume Aceton and 90 by volume isopropyl alchohol 90 99 strength 6 Do not damage any plug socket B vol...

Страница 6: ...ctrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of replacement ES devices touch the p...

Страница 7: ...n anti static suction type solder removal device or with desoldering braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead a...

Страница 8: ...polarity wrap each lead out of the new diode around the corresponding lead on the circuit board 4 Securely crimp each connection and solder it 5 Inspect the solder joints of the two original leads on...

Страница 9: ...horizontal resolution of 1024 dots and a maximum vertical resolution of 768 lines for superior clarity of display By accepting analog signal inputs which level is zero to 0 7 Volts This color monitor...

Страница 10: ...tment procedure described in the service manual is made by a visual check Allow 20 minutes warm up time for the display before checking or adjusting only electrical specification or function Reform th...

Страница 11: ...d function Move cursor to the left window on the OSD window Decrease the value of any selected function Launch OSD On Screen Display MENU window Move cursor to the high window on the OSD window Increa...

Страница 12: ...10 When you choose the icon on the OSD window you can exit the OSD screen OSD OFF MENU MENU MENU MENU Key Process...

Страница 13: ...N BALANCE TRAPEZOID Adjust the left and right margins for more convex or more concave margins PINCUSHION Choose different preset color temperatures or set your own customized color parameters COLOR TE...

Страница 14: ...the Factory Preset Display Settings RECALL ICON CONTROL FUNCTIONS Adjust the vertical picture moire cancellation V MOIRE Adjust the horizontal picture moire cancellation H MOIRE Select language for OS...

Страница 15: ...r pattern of 1024 X 768 48KHz 60Hz c Adjust the Focus control of FBT to obtain best Focus 4 Geometric Distortion Adjustment a Receive the cross hatch pattern of factory preset mode b Pincushion Trapez...

Страница 16: ...arying the angle between the two tabs of the 4 pole magnets d Horizontal red and blue lines are converged by varying the tabs together keeping the angle between them constant e Apply a yellow cross ha...

Страница 17: ...ck the clamping pulse circuit Check the signal cable No Character Is whole screen bright Yes Yes Yes Yes Yes No No No No No Yes Yes Rk Gk Bk About 30 35Vpp No No Is CRT Cathode Rk Gk Bk signal level n...

Страница 18: ...efer to trouble in P S U Refer to trouble in power supply unit Is CRT heater red hot No Yes No No No No Yes No Yes Yes Yes Yes No Is Heater Voltage CRT PWB about 6V Turn the Brightness Contrast contro...

Страница 19: ...ach grid G1 G2 voltage normal Is the output of pre amp IC801 TDA9210 pin 14 16 18 all normal Check video signal cable or video card Trouble in IC801 or its ambient circuit Trouble in video output IC80...

Страница 20: ...ter Voltage about 6V Abnormal OSD Font Is the output of IC204 pin 13 14 15 normal Trouble in Heater voltage line Refer to trouble in P S U Troubie in IC803 or its ambient circuit Trouble in IC204 and...

Страница 21: ...Is the H out waveform of IC501 normal Trouble in IC501 Trouble in Horizontal output circuit No Raster Yes No Is the Collector wave form of Q504 normal Yes Yes Yes Trouble in Q505 No No No Trouble in Q...

Страница 22: ...of the IC501 correct Trouble in IC501 or its ambient circuit Is the pulse of pin 28 of the IC201 correct Check IC501 and its ambient circuit No No No Yes Yes Is the input H Sync correct Check IC201 an...

Страница 23: ...voltage is correct Refer to P S U Is the pulse of pin 6 of the IC401 correct Trouble in vertical D Y No No No Yes Yes Is the output of pin 8 of IC501 all normal Check IC401 and its ambient circuit Yes...

Страница 24: ...22 7 Focus Monitor remains unfocused Check Focus VR in FBT Is focus acceptable Trouble in Focus circuit FBT Yes OK No...

Страница 25: ...onvergence 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 conver...

Страница 26: ...n H OSC Deflection Circuit Refer to Horizontal Output circuit Is the DC level of the base of Q517 changeable No Yes Is the DC level of IC501 pin 11 changeable Yes Check IC501 pin 11 Is the collector p...

Страница 27: ...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...

Страница 28: ...Check the Base waveform of the Q515 Yes Pincusion distortion is excessive or barrel O K Select the side pincushion icon in OSD menu and adjust acceptable position Yes Is the pin 11 waveform of IC501 c...

Страница 29: ...or IC001 and its ambient circuit Trouble in diode D001 D002 D003 D004 or peripheral device No Is the waveform of T001 pin5 correct Trouble in T001 or D101 No Trouble in P S U Is power switch on Switc...

Страница 30: ...28 Is voltage of C105 8Vdc Trouble in D103 No Is voltage of C109 13Vdc No Yes Yes Yes Is voltage of C108 12Vdc Trouble in D104 or vertical part P S U O K Trouble in D106 or horizontal part No A...

Страница 31: ...C INPUT SMPS Transformer MCU NT68P62 Novatek H V OSC Processor TDA4856 Philips V Driver KA2142B Samsung PWM D A IIC Control H Linearity Coil TRL 531X H Def Output TR Damper C S Switching KSC5801 SDS06...

Страница 32: ...PCB LAYOUT 30 Main PCB Component Side...

Страница 33: ...31 Main PCB Solder Side...

Страница 34: ...32 CRT PCB Component Side CRT PCB Solder Side...

Страница 35: ...33 SCHEMATIC DIAGRAM Power Connection Section...

Страница 36: ...34 Control Vert out Section...

Страница 37: ...35 Horizontal Section...

Страница 38: ...36 Video Section...

Страница 39: ...EXPLODED VIEW DIAGRAM 37...

Страница 40: ...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...

Страница 41: ...entified 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 CODE PART NAME PART DESC C210 C...

Страница 42: ...61 CCXF1H104Z C CERA 50V F 0 1MF Z C862 CCXF1H104Z C CERA 50V F 0 1MF Z C863 CCXB1H682K C CERA 50V B 6800PF K TAPPING C864 CCXF1H104Z C CERA 50V F 0 1MF Z C866 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING...

Страница 43: ...EMI PR001 DECPAC140M POSISTOR ECPAC140M290 LOC PART CODE PART NAME PART DESC Q001 TSPP04N60S FET SPP04N60S5 Q002 TZTC3198Y TR KTC3198Y 1815Y AUTO Q101 TZTA1270Y TR KTA1270Y AUTO 562Y Q102 TZTC3198Y TR...

Страница 44: ...BON FILM 1 6 100 OHM J R404 RD AZ101J R CARBON FILM 1 6 100 OHM J LOC PART CODE PART NAME PART DESC R410 RD AZ682J R CARBON FILM 1 6 6 8K OHM J R411 RD AZ682J R CARBON FILM 1 6 6 8K OHM J R412 RD AZ56...

Страница 45: ...R624 RD AZ133J R CARBON FILM 1 6 13K OHM J R625 RD AZ822J R CARBON FILM 1 6 8 2K OHM J R801 RD AZ750J R CARBON FILM 1 6 75 OHM J LOC PART CODE PART NAME PART DESC R802 RD AZ330J R CARBON FILM 1 6 33 O...

Страница 46: ...DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail G7F00E web dwe co kr TEL 82 32 510 7620 FAX 82 32 510 7630...

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