Daewoo 432X Скачать руководство пользователя страница 21 | Manualshive

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19

6. Unstable Picture

6-1. Horizontal

Unstable

picture

Is the

pulse of pin 15 of

the IC501

correct?

Trouble in IC501
or its ambient
circuit

Is the

pulse of pin 33 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 432X

Страница 1: ...ServiceManual XGA COLOR MONITOR Model 432X 523X DAEWOO ELECTRONICS CO LTD OVERSEAS SERVICE DEPT...

Страница 2: ...NICAL INFORMATION 6 GENERAL INFORMATION 7 PIN CONNECTOR 8 CAUTIONS FOR ADJUSTMENT AND REPAIR 8 OPERATION AND ADJUSTMENT 9 ALIGNMENT PROCEDURE 12 TROUBLESHOOTING HINTS 14 BLOCK DIAGRAM 28 PCB LAYOUT 29...

Страница 3: ...ical parts should be replaced with manufacturer s specified parts to prevent X radiation shock fire or other hazards Do not modify the original design without getting a written permission from DAEWOO...

Страница 4: ...mage 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 Statements indicat...

Страница 5: ...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 defeat any plug socket B volta...

Страница 6: ...d together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of a replacement ES device touch the protective mater...

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: ...Securely crimp each connection and solder it 5 Inspect the solder joints of the two original leads on the circuit board copper side If they are not shiny reheat them and apply additional solder if nec...

Страница 9: ...monitor has a maximum 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 Vol...

Страница 10: ...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 voltage before servicing...

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 Key Process MENU Start When you choose the icon on the OSD window you can exit the OSD screen Hot Key BRIGHTNESS CONTRAST...

Страница 13: ...play Settings LANGUAGE RECALL OSD Functions Adjust the left and right margins for more convex or more concave margins Adjust the trapezoid of the screen by moving the lines inward or outward PINCUSHIO...

Страница 14: ...s 4 Geometric Distortion Adjustment a Receive the cross hatch pattern of factory preset mode b Pincushion Trapezoid are adjusted the best geometric status 5 White Balance Adjustment a Select 9300 K on...

Страница 15: ...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 16: ...ts ambient circuit Trouble in 8Vdc line of the Main PWB Check 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...

Страница 17: ...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 Increase the Brightness Contrast control level fully Maximu...

Страница 18: ...G2 voltage normal Is the output of pre amp IC801 pin 15 19 22 all normal Check video signal cable or video card Trouble in IC801 or its ambient circuit Trouble in video output circuit Q803 Q804 Q833 Q...

Страница 19: ...OSD Font Is the output of IC204 PIN 21 22 23 normal Refer to Missing Color No Yes Yes Yes If menu key selected Trouble in IC801 and its ambient circuit No No Yes Is the Fast Blanking signal IC204 pin...

Страница 20: ...ble in Q505 T501 If the holddown circuit stops the horizontal oscillator during the check turn off the power then turn on again about 10 seconds later Yes Yes Yes Check the circuit of P S U No Trouble...

Страница 21: ...of the IC501 correct Trouble in IC501 or its ambient circuit Is the pulse of pin 33 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 22: ...oltage is correct Refer to P S U Is the pulse of pin 4 6 of the IC401 correct Trouble in vertical D Y No No No Yes Yes Is the output of pin 12 13 of IC501 all normal Check IC401 and its ambient circui...

Страница 23: ...21 7 Focus Monitor remains unfocused Check Focus VR in FBT Is focus acceptable Trouble in Focus circuit FBT Yes OK No...

Страница 24: ...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 25: ...e base of Q521 changeable No Yes Is the DC level of C221 changeable Yes No Check the Q519 Q520 and its ambient circuit Is the collector pulse of Q506 correct Is the cathode waveform of D508 correct Ch...

Страница 26: ...24 9 2 Vertical Size Is the DC voltage of C219 changeable Check the IC201 and its ambient circuit No Trouble in Vertical Output Circuit Refer to Vertical Output circuit Yes Abnormal V Size...

Страница 27: ...8 Q522 and its ambient circuit Yes Pincusion distortion is excessive or barrel O K Select the pincushion icon in OSD menu and adjust acceptable position Yes Is the waveform of IC501 pin 11 correct No...

Страница 28: ...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 29: ...27 Is voltage of IC102 pin 3 5Vdc Trouble in IC102 D103 No Is voltage of C108 35Vdc No Yes Yes Yes Is voltage of IC103 pin3 12Vdc Trouble in D106 Q103 Q104 IC103 P S U O K Trouble in D104 T001 No A...

Страница 30: ...SIZE H V POS G D H FBP H LIN V BLK SCL SDA F BLK R G B OSD DY SIGNAL IN PRE AMP MC13282EP VIDEO OUT BIAS BFQ225 PH2369 BFQ221 BFQ241 BRIGHT CONTROL EEPROM 24LC04B MCU NT6862 OSD GEN DWOSD04 CONTRAST A...

Страница 31: ...PCB LAYOUT 29 Main PCB Component Side...

Страница 32: ...30 Main PCB Solder Side...

Страница 33: ...31 Video PCB Component Side Video PCB Solder Side...

Страница 34: ...32 SCHEMATIC DIAGRAM...

Страница 35: ...33...

Страница 36: ...34...

Страница 37: ...35...

Страница 38: ...EXPLODED VIEW DIAGRAM 36...

Страница 39: ...placing any components use only manufacturer s specified parts Abbreviation of Description Fig Part No Description Index R101 Resistors RE 42820J Carbon 82J R102 RD 4Z201J Carbon1 4W 200J Allowance F...

Страница 40: ...ZCA C CHIP CERA 50V Z5U 0 1MF Z 2012 C216 CEXF1H479V C ELECTRO 50V RSS 4 7MF 5X11 TP C217 CEXF1H479V C ELECTRO 50V RSS 4 7MF 5X11 TP C218 CEXF1H479V C ELECTRO 50V RSS 4 7MF 5X11 TP C219 CEXF1H229V C E...

Страница 41: ...41 CEXF2A109V C ELECTRO 100V RSS 1MF 5 11 TP C842 HCZK104ZCA C CHIP CERA 50V Z5U 0 1MF Z 2012 C861 HCZK104ZCA C CHIP CERA 50V Z5U 0 1MF Z 2012 C862 HCZK104ZCA C CHIP CERA 50V Z5U 0 1MF Z 2012 C863 CEX...

Страница 42: ...4A FET BSN254A Q506 TBU2520DX TR BU2520DX Q507 TZTC3198Y TR KTC3198Y 1815Y AUTO Q508 TZTC3198Y TR KTC3198Y 1815Y AUTO Q509 TZTA1266Y TR KTA1266Y AUTO 1015Y Q510 T1RF630A FET IRF630A LOC PART CODE PART...

Страница 43: ...6 4 7K OHM J R245 HRFT202JCA R CHIP 1 10 2K OHM J 2012 R247 RD AZ393J R CARBON FILM 1 6 39K OHM J R250 HRFT101JCA R CHIP 1 10 100 OHM J 2012 R251 HRFT101JCA R CHIP 1 10 100 OHM J 2012 R252 RD AZ151J...

Страница 44: ...HRFT273JCA R CHIP 1 10 27K OHM J 2012 R571 HRFT333JCA R CHIP 1 10 33K OHM J 2012 LOC PART CODE PART NAME PART DESC R255 HRFT562JCA R CHIP 1 10 5 6K OHM J 2012 R256 HRFT105JCA R CHIP 1 10 1M OHM J 2012...

Страница 45: ...TAP X201 5PEF0EC8T4 RESONATOR EFOEC8004T4 LOC PART CODE PART NAME PART DESC R572 RD AZ563J R CARBON FILM 1 6 56K OHM J R573 HRFT622JCA R CHIP 1 10 6 2K OHM J 2012 R574 HRFT203JCA R CHIP 1 10 20K OHM...

Страница 46: ...OVERSEAS SERVICE DEPT DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPOGU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC FAX 02 590 6291 TEL 02 360 7114 590 6151 5 http www...

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