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AOC L19WH, Service Manual

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AOC L19WH Service Manual Download Page 34

19" LCD Color Monitor                                         No Brand L19WH

 

34 

8.2.2 Power Board       

1. No Power 

           

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check to CN902 Pin1, 2 =12V and Pin3, 4 = 5 V 

OK 

Check Interface board 

Check AC line volt 120V or 220V

Change F901, Check BD901, Q903, IC901 

Check the voltage of C905 (+) 

Check bridge retified circuit 

Check start voltage for the Pin6 of IC901 

Change IC901 

OK 

Check the auxiliary voltage is smaller than 20V 

OK 

NG 

No power 

NG 

NG 

OK 

NG 

Repeating the start voltage 

Check D908, D909, ZD903… 

Check IC902,IC903 

Check Q903…OLP circuit 

NG 

OK 

Summary of Contents for L19WH

Page 1: ...General Instructions 5 3 2 Control Button 5 3 3 Adjusting the Picture 7 4 Input Output Specification 9 4 1 Input Signal Connector 9 4 2 Factory Preset Display Modes 9 4 3 Panel Specification 10 5 Blo...

Page 2: ...itor No Brand L19WH 2 Revision List Version Release Date Revision History TPV Model Name A00 Sep 13 06 Initial release T96HM5HBWJDXAP A01 Nov 07 06 Add new BOM T96AM5HBWJDXAP A02 Mar 24 08 Add new BOM...

Page 3: ...40 900 60Hz Plug Play VESA DDC2BTM EPA ENERGY STA ON Mode 40W OFF Mode 1W Input Connector 15 pin D Sub Input Video Signal Analog 0 7Vp p standard 75 OHM Positive Display area 408 24mm H x255 15 mm V P...

Page 4: ...ss control logic and DDC The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage Video signal DDC Power Board Include adapter and i...

Page 5: ...e panel By changing these settings the picture can be adjusted to your personal performance The power cord should be connected and insert to adaptor Connect the video cable from the monitor to the com...

Page 6: ...unction To lock the OSD press and hold the MENU button while the monitor is off and then press power button to turn the monitor on To un lock the OSD press and hold the MENU button while the monitor i...

Page 7: ...elect the exit function If you want to adjust any other function repeat steps 2 3 Main Menu Item Main Menu Icon Sub Menu Item Sub Menu Icon Description Luminance Contrast Contrast from Digital registe...

Page 8: ...N A Do not execute Auto Config return to main menu OSD Setup H Position Adjust the horizontal position of the OSD V Position Adjust the vertical position of the OSD OSD Timeout Adjust the OSD timeout...

Page 9: ...15 DDC Serial Clock 8 B Ground VGA connector layout PIN 1 PIN 5 PIN 11 4 2 Factory Preset Display Modes Standard Resolution Horizontal Frequency Vertical Frequency Dos mode 720 x 400 31 47kHz 70 0Hz V...

Page 10: ...19 LCD Color Monitor No Brand L19WH 10 4 3 Panel Specification HSD190MGW1 A00 4 3 1 General Feature...

Page 11: ...19 LCD Color Monitor No Brand L19WH 11 4 3 2 Optical Characteristics Test Conditions Optical Specification...

Page 12: ...19 LCD Color Monitor No Brand L19WH 12 5 Block Diagram 5 1 Software Flow Chart 1 2 N Y 5 Y N 10 Y N 12 Y N 7 Y N 6 4 3 8 9 14 11 13 Y N 15 Y N 16 17 19 Y N 18...

Page 13: ...rn on the LED and set it to green color Scalar initialize 10 In standby mode 11 Update the lifetime of back light 12 Check the analog port are they re any signals coming 13 Does the scalar send out an...

Page 14: ...05 DVI CN406 SCALAR TSUM56AK 1 U401 Crystal X401 14 318MHz DDC DVI port DDC DSUB port CN404 to Audio Board CN403 to Keyboard To Inverter Block CN101 To Panel Panel Power sequence control circuit block...

Page 15: ...ilter Start circuit R904 R931 R938 Transform Switching circuit PWM control IC MOSFET Rectifier and filter D908 D909 Feedback circuit IC902 IC903 12V 5V Start circuit On off control PWM control IC Push...

Page 16: ...SCL DET_VGA on_BACKLIGHT on_Panel 5V PA 14 19 PB 0 5 PB 6 11 GPO 0 4 ESP OSP on_PANEL_12V PB 12 23 12V DDC_WP 3V3 B5 5 PANEL INTERFACE VLCD PA 0 7 PA 8 13 ESP PA 14 19 PB 0 5 PB 6 11 GPO 0 4 OSP VLCD_...

Page 17: ...C704 22uF 50V C702 22uF 50V N C GND MMBT3904 GND X 12V C715 0 022uF VLCD_12V 5 R735 4 7K 1 16W P S The 1N4148 Vf 0 7V 1V can t meet LDO spec The BAT42 Vf is OK but the If 200mA forward current can not...

Page 18: ...0 BAV99 3 1 2 R465 10 1 16W GIN 4 R434 56 1 16W R458 100 1 16W D403 BAV99 3 1 2 CN405 DB15 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 17 16 PC5V R470 10K 1 10W R435 56 1 16W D410 MLL5232B 5 6V 5V 2 4 SCL_VGA...

Page 19: ...DP GPO1 R420 100 1 16W R481 NC 59 56 57 54 58 55 53 63 64 51 62 61 70 72 71 73 79 21 108 32 33 109 110 111 112 113 114 118 119 120 121 122 123 124 125 126 127 107 106 105 41 47 39 40 42 43 44 45 46 48...

Page 20: ...N PA 0 7 4 PA 14 19 4 12V INNOLUX 15 Table 1 V PB0 ESP STV1 FG0P RA1N R105 NC C107 NC 0R 12V GPOO1 GA3N PB13 R738 150R 1 4W CPT 15 LVA3M C104 NC GB3P PA6 GA2P NC BA3P LVA1M 3 3V 3 3V R91 V FB2N GA3P P...

Page 21: ...NC 1 4 2 3 L901 2 0MH R904 100K 1 4W Title Size Document Number Rev Date Sheet of 1 1 POWER OUTPUT 12V 5 V AOC Top Victory Electronics Co Ltd 1 1 Friday July 21 2006 C910 470pF 50V C931 1000PF 500V C...

Page 22: ...0 1uF OPT2 OPT3 R813 1M 1 8W C808 0 0068uF C829 0 1uF Title Size Document Number Rev Date Sheet of 1 HP W19 series 17 19 4 LAMPS INVERTER AOC Top Victory Electronics Co Ltd 1 1 Tuesday February 27 20...

Page 23: ...t of CN002 EAR PHONEJACK 1 5 4 3 2 7 8 LED_GRN ESD by jc chen 2006 5 11 CN003 SPK R 1 2 LED_ORANGE SW005 KEY MANU KEY RIGHT SW001 KEY SEL ORANGE GND wire GND GND R102 75 GREEN GND ZD101 BZX79 B5V6 1 2...

Page 24: ...GND INL VAROUT_L VOLUME VAROUT_R NC INR SVR STBY MUTE GND OUTR VS VS OUTL GND GND GND GND GND OUT_R MUTE ZD202 BZX79 B5V6 1 2 R207 1K 12V R201 18K GND 12V C205 470uF 16V C213 0 1uF C211 100pF C204 0 4...

Page 25: ...19 LCD Color Monitor No Brand L19WH 25 7 PCB Layout 7 1 Main Board...

Page 26: ...19 LCD Color Monitor No Brand L19WH 26...

Page 27: ...19 LCD Color Monitor No Brand L19WH 27 7 2 Power Board...

Page 28: ...19 LCD Color Monitor No Brand L19WH 28...

Page 29: ...19 LCD Color Monitor No Brand L19WH 29 7 3 Key Board...

Page 30: ...19 LCD Color Monitor No Brand L19WH 30 7 4 Audio Board...

Page 31: ...alyzer 7 Service Manual 8 User Manual 8 2 Trouble Shooting 8 2 1 Main Board No Power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100 240 is norma...

Page 32: ...orm is normal Replace U401 Replace X401 Measure U702 Vout 3 3V Q702 Vc 1 8V Check Correspondent component Replace U401 X401 oscillate waveform is normal Replace U702 Q702 OK OK OK OK OK NG NG NG NG Ch...

Page 33: ...White Screen White screen Measure C725 5V Checks Q704 Q706 Q708 are broken Check CN101 connector or solder normal Replace CN101 or re solder Replace PANEL OK Replace Q704 Q706 Q708 NG NG NG Check X401...

Page 34: ...line volt 120V or 220V Change F901 Check BD901 Q903 IC901 Check the voltage of C905 Check bridge retified circuit Check start voltage for the Pin6 of IC901 Change IC901 OK Check the auxiliary voltage...

Page 35: ...1 have square wave Check Q807 Q808 Q809 Q810 Check ON OFF signal Check IC801 PIN2 5V Check adapter circuit Check Interface board OK OK NG NG Check Q801 Q802 Q803 NG NG OK Check Q805 Q806 PT801 PT802 C...

Page 36: ...36 8 2 3 Key Board OK OK OSD is unstable or not working Is Keypad board connecting normally Is Button Switch normally Is Keypad board normally Check main board Connect Keypad Board Replace Button Swit...

Page 37: ...re 1 Switch the Chroma 7120 to RGB Mode with press MODE button 2 Switch the MEM Channel to Channel 3 with up or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 296 20 y 311 20...

Page 38: ...20 y 329 20 Y 180 cd m2 4 Adjust the RED of color3 on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN of color3 on factory window until chroma 7120 indicator reac...

Page 39: ...19 LCD Color Monitor No Brand L19WH 39 10 Monitor Exploded View...

Page 40: ...K 095G801416XH04 WIRE HARNESS 095G8018 3515 LVDS CABLE 0M1G 340 8225 CR3 SCREW 0M1G1140 6120 SCREW 0M1G1730 6120 SCREW 42 D020523 0M1G2430 5225 CR3 SCREW 0Q1G 330 8120 SCREW 3X8MM 42A9930017 42 D00209...

Page 41: ...60218352T 18KOHM 5 1 6 R203 061G 60218352T 18KOHM 5 1 6 R210 061G 60220352T CFR 20K OHM 5 1 6W R211 061G 60220352T CFR 20K OHM 5 1 6W R202 061G 60220452T 200KOHM 5 1 6W R212 061G 60222452T 220KOHM 5...

Page 42: ...404 056G1133 34 M24C02 WMN6TP U403 056G1133 56 M24C16 WMN6TP U402 056G1133 59 LW3M5T9HAQ6 SST25VF010 20 4C SAE S01C 8 Q402 057G 417 4 PMBS3904 PHILIPS SMT 04 Q404 057G 417 4 PMBS3904 PHILIPS SMT 04 Q7...

Page 43: ...03102 RST CHIPR 1K OHM 5 1 10W R487 061G0603103 RST CHIPR 10 KOHM 5 1 10W R485 061G0603103 RST CHIPR 10 KOHM 5 1 10W R484 061G0603103 RST CHIPR 10 KOHM 5 1 10W R451 061G0603103 RST CHIPR 10 KOHM 5 1 1...

Page 44: ...PR 4 7K OHM 5 1 10W R712 061G0603472 RST CHIPR 4 7K OHM 5 1 10W R735 061G0603472 RST CHIPR 4 7K OHM 5 1 10W R702 061G0603510 RST CHIPR 51 OHM 5 1 10W R723 061G0603513 RST CHIPR 51 KOHM 5 1 10W R434 06...

Page 45: ...104 32 CHIP 0 1UF 50V X7R C409 065G0603104 32 CHIP 0 1UF 50V X7R C407 065G0603104 32 CHIP 0 1UF 50V X7R C406 065G0603104 32 CHIP 0 1UF 50V X7R C405 065G0603104 32 CHIP 0 1UF 50V X7R C404 065G0603104 3...

Page 46: ...93G 39147SEM ZMM5V6ST D411 093G 39147SEM ZMM5V6ST D412 093G 39147SEM ZMM5V6ST D407 093G 64 42 P BAV70 SOT23 BY PAN JIT D403 093G 6433P BAV99 D404 093G 6433P BAV99 D405 093G 6433P BAV99 D401 093G 39S 4...

Page 47: ...PCB PWPC1942HH2P POWER BOARD G1899 1 HP X 1 061123 040G 45762420A LABEL 25X6MM 009G6005 1 GROUND TERMINAL 015G8033 1 GP BKT_AC INLET CN801 033G8021 2E U INVERT CONNECTOR CN802 033G8021 2E U INVERT CO...

Page 48: ...LITEON CN902 095G8014 12569 WIRE HARNESS 0M1G1730 6125 GP SCREW 705G 780 87 27 CN901 ASS Y 052G6025 12113 GP MYLAR CN901 087G 501 27 RF GP AC SOCKET 705G 980 61S01 R905 ASS Y R905 061G152M10458F 100K...

Page 49: ...W R803 061G0805103 RST CHIPR 10K OHM 5 1 8W R804 061G0805103 RST CHIPR 10K OHM 5 1 8W R806 061G0805103 RST CHIPR 10K OHM 5 1 8W R812 061G0805103 RST CHIPR 10K OHM 5 1 8W R912 061G0805103 RST CHIPR 10K...

Page 50: ...R803 061G1206000 RST CHIPR 0 OHM 5 1 4W R928 061G1206000 4 RST CHIPR 0 OHM 5 1 4W R932 061G1206000 4 RST CHIPR 0 OHM 5 1 4W R916 061G1206101 RST CHIPR 100 OHM 5 1 4W R936 061G1206101 RST CHIPR 100 OHM...

Page 51: ...32 CAP CHIP 0805 0 1UF K 50V X7R C843 065G0805104 32 CAP CHIP 0805 0 1UF K 50V X7R C842 065G0805104 32 CAP CHIP 0805 0 1UF K 50V X7R C839 065G0805104 32 CAP CHIP 0805 0 1UF K 50V X7R C838 065G0805104...

Page 52: ...LZ 5 6B LLDS ZD902 093G 39S 24 T RLZ 5 6B LLDS ZD903 093G 39S 38 T PTZ 9 1B ZD901 093G 39S 40 T RLZ 13B LLDS ZD904 093G 39S 44 T RLZ18B LLDS CN901 006G 31500 EYELET C905 006G 31502 1 5MM RIVET L901 00...

Page 53: ...80GL19T8V1 TRANSFORMER ASS Y 034FPE19P03 CASE EEL19 Q07G 1 5 W1 X WOODEN PALLET Q26G 800504 2 BAR CODE LABEL Q40G 19N61525C RATING LABEL Q40G0001624 4A PALLET LABEL Q44G6000 DX 1A CARTON Q44G9030 1 EP...

Page 54: ...03103 RST CHIPR 10 KOHM 5 1 10W R480 061G0603150 1F RST CHIPR 1 5 KOHM 1 1 10W R741 061G0805222 RST CHIPR 2 2KOHM 5 1 8W C423 065G0603120 31 CHIP 12pF 50V NPO C421 065G0603120 31 CHIP 12pF 50V NPO C41...

Page 55: ...IPR 10 KOHM 5 1 10W R480 061G0603150 1F RST CHIPR 1 5 KOHM 1 1 10W R741 061G0805222 RST CHIPR 2 2KOHM 5 1 8W C421 065G0603120 31 CHIP 12pF 50V NPO C423 065G0603120 31 CHIP 12pF 50V NPO C417 065G060322...

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