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27

10. High Voltage Circuit

Trouble in Q602 or FBT

Is Q602

base waveform

normal?

Yes

Yes

Trouble in Q612, Q613
12V Line

Is Q601

collector waveform

normal?

Yes

No

Trouble in Q601

Is Q503

emitter waveform

normal?

Yes

No

Trouble in Q503, Q504

Is IC501

pin 26 waveform

normal?

Yes

No

Trouble in power supply

Is IC501

pin 29 voltage

about 12V?

No

No

Trouble in IC501
ambient circuit.

Is the

input H.Sync

correct?

Yes

Yes

No

Trouble in H.V circuit

(No Raster)

Trouble in H.Sync

Trouble in power
supply circuit

Is

B+(210V) line

voltage normal?

No

Summary of Contents for 710C

Page 1: ...ServiceManual XGA COLOR MONITOR Model 710C DAEWOO ELECTRONICS CO LTD OVERSEAS SERVICE DEPT...

Page 2: ...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 materi...

Page 3: ...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...

Page 4: ...r side If they are not shiny reheat them and apply additional solder if necessary TECHNICAL INFORMATION Picture Tube Type 17 inch Flat Square Tube type 16 2 inch viewing area Dot Pitch 0 26mm Face Tre...

Page 5: ...r VGA VESA and XGA and Apple Macintosh Video Card And so this color monitor has a maximum horizontal resolution of 1280 dots and a maximum vertical resolution of 1024 lines for superior clarity of dis...

Page 6: ...ly electrical specification 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 Com...

Page 7: ...9 OPERATION ADJUSTMENT 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...

Page 8: ...OFF CONTRAST 50 BRIGHTNESS 50 PINCUSHION 50 TRAPEZOID 50 COLOR TEMP K 9300 6550 RED GAIN K 50 STATUS H 31 5KHZ V 70 5 HZ Z Z Z TEST TEST PATTERN NO Z Z Z YES MENU MENU R G B R G B R G B R G B R G B R...

Page 9: ...ion of the display horizontally left or right Adjust the display width horizontal size Adjust the position of the display vertically up or down Adjust the display height vertical size Adjust the displ...

Page 10: ...ing left or right Image turns to by Image turns to by Adjust the side balance when the sides of the screen are bowed towards left or right Image turns to by Image turns to by Adjust the horizontal pic...

Page 11: ...es or set your own customized color parameters Adjust the red gain Adjust the green gain Adjust the blue gain Adjust the red bias Adjust the green bias Adjust the blue bias 9300 6550 COLOR TEMP RED GA...

Page 12: ...MS mode Out of Range screen is displayed when the applied frequency is under or over normal range Normal range H 30 86 KHz V 50 160 Hz When the monitor doesn t display if you press any key Self Diagno...

Page 13: ...their ambient circuit Trouble in 12Vdc 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...

Page 14: ...U Refer to trouble in power supply unit Is CRT heater red hot No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Is Heater Voltage CRT PWB about 6V Turn the Brightness Contrast control fully Maximum...

Page 15: ...h 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 Trouble in IC801 or its ambient circuit Trouble in video output circuit...

Page 16: ...Voltage CRT PWB about 6V Abnormal OSD Font Is the output of IC802 pin 21 22 23 normal Trouble in Heater voltage line Refer to trouble in P S U Troubie in IC802 or its ambient circuit Trouble in IC802...

Page 17: ...p Down of IC501 Check Q510 and its ambient circuit Trouble in IC501 Trouble in Horizontal output circuit Yes No Are the Collector waveform of Q503 and Q504 normal Yes Yes Yes Trouble in Q508 and its a...

Page 18: ...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 4 of IC501 5V Check the value of C505 R503 Yes Yes No No Trou...

Page 19: ...Is 12Vdc line correct Trouble in power supply unit No Yes Is the output waveform of IC401 pin 6 normal V DY failure Trouble in V Sync line or IC501 failure Yes No 45Vpp Is the output pulse of IC501 p...

Page 20: ...22 7 Focus Monitor remains unfocused Adjust finely Focus VR in FBT Is focus acceptable Trouble in Focus circuit FBT Yes OK No...

Page 21: ...orm of the pin 1 of FBT 2 Check D614 Check after adjusting the static focus finely by VR in FBT DF waveform FVH FVH FVV FVV No Yes Yes Is the waveform of the pin 15 in IC501 correct Yes No 1 Trouble i...

Page 22: ...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...

Page 23: ...9 1 Horizontal Size It isn t out of order Is the H Size about 295mm at VGA mode and Min H Size on OSD Menu No Yes 1 Check B section of TDA9110 and its ambient circuit 2 Check IC503 and its ambient ci...

Page 24: ...age 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 changeable the DC lev...

Page 25: ...ble in Q601 Is Q503 emitter waveform normal Yes No Trouble in Q503 Q504 Is IC501 pin 26 waveform normal Yes No Trouble in power supply Is IC501 pin 29 voltage about 12V No No Trouble in IC501 ambient...

Page 26: ...rrel O K Select the side pincushion icon on OSD menu and adjust acceptable position Yes Check Q501 or its ambient circuit Is the pin 24 waveform of IC501 correct Yes No Check IC501 or its ambient circ...

Page 27: ...of T001 pin 6 130V 370V Trouble in TH001 C014 BD001 D003 D004 D008 No Is the waveform of IC001 pin 3 correct 400Vpp 620Vpp Trouble in D003 D004 etc No Trouble in P S U Is power switch on Switch on No...

Page 28: ...C124 8 7Vdc Trouble in D109 or CRT No Is voltage of C115 12Vdc No Yes Yes Yes Is voltage of C116 12Vdc Trouble in D107 IC104 or vertical Part P S U O K Trouble in D105 D106 IC102 IC103 IC701 or horiz...

Page 29: ...MAX b Receive all H character pattern of 79 9KHz mode signal c Adjust the Focus control of FBT to obtain best Focus static focus and Dynamic focus 4 Geometric Distortion Adjustment a Receive the cros...

Page 30: ...tion c Vertical red and blue lines are converged by varying 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...

Page 31: ...PROTECT H V CONTROL KA7500 B BUCK L B CONTROL H SIZE G D CONTROL H DRV AUTO H LIN CONTROL V DRV AMP KA2142 G1 CONTROL G1 MUTE POWER TACT S W HIGH VOLTAGE SCREEN FOCUS R G B BIAS BRIGHT CONTROL R G B S...

Page 32: ...37...

Page 33: ...38...

Page 34: ...ant Safety Notice Components identified with the International Symbol have special characteristics important for safety When replacing any components use only manufacturer s specified parts Abbreviati...

Page 35: ...RO 400V SMH 330MF 30 45 C018 CL1UC3104M C LINE ACROSS WORLD AC250V 0 1UF M R 47 C101 CEYF2E101V C ELECTRO RSS 250V 100MF 18X35 5 C104 CEXF1V221V C ELECTRO 35V RSS 220MF 10X12 5 TP C105 CEXF1V101V C EL...

Page 36: ...R 100V MEU 0 22MF J C408 CMXL2A474J C MYLAR MEU 100V 0 47MF J C409 CEXF1H330V C ELECTRO 50V RSS 33MF 6 3X11 TP C410 CMXM2A273J C MYLAR 100V 0 027MF J TP C411 CMXM2A153J C MYLAR 100V 0 015MF J TP C420...

Page 37: ...RSS 4 7MF 5X11 TP C540 CCZF1H103Z C CERA 50V F 0 01MF Z C541 CEXF1E101V C ELECTRO 25V RSS 100MF 6 3X11 TP C542 CCZF1H104Z C CERA 50V HIKF 0 1MF Z C543 CCXB2H101K C CERA 500V B 100PF K TAPPING C544 CC...

Page 38: ...MYLAR MPP 200V 1MF J C606 CEXF2C109V C ELECTRO 160V RSS 1MF 6 3X11 TP C607 CMXM2A104J C MYLAR 100V 0 1MF J TP C608 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C609 CMXL2E473J C MYLAR MEU 250V 0 047MF J...

Page 39: ...YLAR 100V 0 1MF J TP C723 CCZB1H221K C CERA 50V B 220PF K C724 CCZB1H221K C CERA 50V B 220PF K C730 CCZB1H102K C CERA 50V B 1000PF K C731 CCXB1H181K C CERA 50V B 180PF K TAPPING C801 CEXF1H100V C ELEC...

Page 40: ...CERA HIKF 500V 0 01MF Z C886 HCFK103ZCA C CHIP CERA 50V Y5V 0 01MF Z 2012 C889 CEXF2A470C C ELECTRO 100V RUS 47MF 10X16 TP C891 CCZF1H104Z C CERA 50V HIKF 0 1MF Z C897 HCQK330JCA C CHIP CERA 50V CH 33...

Page 41: ...DIODE 1N4148 AUTO 52MM D403 D1N4937GP DIODE 1N4937GP TAPPING D501 DZN4148 DIODE 1N4148 AUTO 52MM D502 DZN4148 DIODE 1N4148 AUTO 52MM D503 DZN4148 DIODE 1N4148 AUTO 52MM D506 DDTV64F DIODE DTV64F D507...

Page 42: ...TO 52MM D833 DZN4148 DIODE 1N4148 AUTO 52MM D861 DZN4148 DIODE 1N4148 AUTO 52MM D862 DZN4148 DIODE 1N4148 AUTO 52MM D863 DRLS4148 DIODE CHIP RLS4148 D864 DZN4148 DIODE 1N4148 AUTO 52MM D865 DZN4148 DI...

Page 43: ...SE140N IC108 1K1A7806P1 IC REGULATOR KIA7806PI IC401 1KA2142 IC V OUT KA2142 IC501 1TDA9110 IC DEFLECTION TDA9110 IC502 1DBL358 IC DBL358 DUAL OP AMP IC503 1UPC1555C IC UPC1555C IC504 1K1A7042P IC SW...

Page 44: ...IN DA IB0214 D2 3 DY PIN PH001 1TLP721GR IC PHOTO COUPLER TLP721D4GR PR001 DECPAC140M POSISTOR ECPAC140M290 Q001 TKTC2073 TR KTC2073 Q002 TZTC3207 TR KTC3207 AUTO Q104 TZTC3198Y TR KTC3198Y 1815Y AUTO...

Page 45: ...A1270Y TR KTA1270Y AUTO 562Y Q616 T2SC4630 TR 2SC4630 Q644 TZTA1270Y TR KTA1270Y AUTO 562Y Q701 TZTC3198Y TR KTC3198Y 1815Y AUTO Q702 TZTC3198Y TR KTC3198Y 1815Y AUTO Q703 TZTC3198Y TR KTC3198Y 1815Y...

Page 46: ...LM 2W 150K OHM J TAPPING R119 RD 2Z243J R CARBON FILM 1 2 24K OHM J R120 RD AZ102J R CARBON FILM 1 6 1K OHM J R121 RD AZ473J R CARBON FILM 1 6 47K OHM J R126 RS02Z569J R M OXIDE FILM 2W 5 6 OHM J TAPP...

Page 47: ...6 750 0 OHM F R510 RD AZ681J R CARBON FILM 1 6 680 OHM J R511 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R512 RN AZ7500F R METAL FILM 1 6 750 0 OHM F R513 RN AZ6191F R METAL FILM 1 6 6 19K OHM F R514 RS01...

Page 48: ...6 4 7K OHM J R551 RD AZ104J R CARBON FILM 1 6 100K OHM J R552 RD AZ102J R CARBON FILM 1 6 1K OHM J R553 RD AZ332J R CARBON FILM 1 6 3 3K OHM J R554 RD 4Z331J R CARBON FILM 1 4 330 OHM J R555 RS02Z430J...

Page 49: ...OXIDE FILM 2W 0 75 OHM J R592 RD AZ122J R CARBON FILM 1 6 1 2K OHM J R593 RD AZ183J R CARBON FILM 1 6 18K OHM J R594 RD AZ183J R CARBON FILM 1 6 18K OHM J R595 RD AZ183J R CARBON FILM 1 6 18K OHM J R5...

Page 50: ...1 6 18K OHM J R633 RS02Z100J R M OXIDE FILM 2W 10 OHM J TAPPING R634 RD 4Z104J R CARBON FILM 1 4 100K OHM J R636 RD AZ182J R CARBON FILM 1 6 1 8K OHM J R637 RN AZ6191F R METAL FILM 1 6 6 19K OHM F R63...

Page 51: ...1 6 23 2K OHM F R733 RN AZ4752F R METAL FILM 1 6 47 5K OHM F R734 RN AZ9092F R METAL FILM 1 6 90 9K OHM F R736 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R750 RD AZ392J R CARBON FILM 1 6 3 9K OHM J R753...

Page 52: ...FILM 1 6 100 OHM J R831 HRFT750JCA R CHIP 1 10 75 OHM J 2012 R832 RD AZ101J R CARBON FILM 1 6 100 OHM J R833 HRFT391JCA R CHIP 1 10 390 OHM J 2012 R834 RD AZ100J R CARBON FILM 1 6 10 OHM J R836 RD AZ1...

Page 53: ...M 1 2 820 OHM J R886 RD 2Z333J R CARBON FILM 1 2 33K OHM J R887 RD 2Z109J R CARBON FILM 1 2 1 OHM J R888 RD 4Z103J R CARBON FILM 1 4 10K OHM J R889 RD 4Z103J R CARBON FILM 1 4 10K OHM J R890 RD 4Z103J...

Page 54: ...KPT 1115VM 1C 1P SW704 5S50101Z01 SW TACT KPT 1115VM 1C 1P SW705 5S50101Z01 SW TACT KPT 1115VM 1C 1P T001 5RM0000092 TRANS SMPS DMT 710C T002 5RY0000004 TRANS SYNC DST 710C T501 5RH0000106 FBT FFA760...

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