AOC I-INC AH191D Service Manual Download Page 42 | Manualshive

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AOC I-INC AH191D Service Manual Download Page 42

19" LCD Color Monitor

I-INC AH191D

42

2. W/LED No Backlight

Check C811 (+) =12V

Check the resonant wave of Pin7 & Pin8 for PT801/PT802

Check the Pin1, Pin15 of IC801 have square wave

Check the output of PT801/PT802

Check ON/OFF signal

Check IC801 PIN2=5V

Check adapter circuit

Check Interface board

OK

OK

NG

NG

Check Q801,Q802,Q803

Check Q805,Q806 have the output of
square wave at short time.

Check Q805,Q806,PT801,PT802

Check C816, C841 or C834, C837

Change PT801 or PT802

Check connecter & lamp

http://www.wjel.net

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Summary of Contents for I-INC AH191D

Page 1: ...al Instructions 7 3 2 Control Button 7 3 3 Adjusting the Picture 9 4 Input Output Specification 14 4 1 Input Signal Connector 14 4 2 Factory Preset Display Modes 15 4 3 Panel Specification 16 5 Block...

Page 2: ...19 LCD Color Monitor I INC AH191D 2 Revision List Revision Date Revision History TPV Model A00 Nov 02 2006 Initial release T96HM6DTWEHZAE h t t p w w w w j e l n e t...

Page 3: ...s may create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from AOC AOC assumes no liability express or implied arisin...

Page 4: ...19 LCD Color Monitor I INC AH191D 4 1 Monitor Specifications h t t p w w w w j e l n e t...

Page 5: ...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 AC IN 100V 240V Power board Include adapter inverter Flat Pa...

Page 6: ...19 LCD Color Monitor I INC AH191D 6 Dimensions h t t p w w w w j e l n e t...

Page 7: ...uttons are located in the front of the monitor By changing these settings the picture can be adjusted to your personal preferences The power cord should be connected Connect the video cable from the m...

Page 8: ...timized the H Position V Position Clock and Focus NOTES Do not install the monitor in a location near heat sources such as radiators or air dusts or in a place subject to direct sunlight or excessive...

Page 9: ...s or to select the desired function 3 Press the MENU button to select the function that you want to adjust 4 Press or to change the settings of the current function 5 To exit and save select the exit...

Page 10: ...19 LCD Color Monitor I INC AH191D 10 h t t p w w w w j e l n e t...

Page 11: ...19 LCD Color Monitor I INC AH191D 11 h t t p w w w w j e l n e t...

Page 12: ...19 LCD Color Monitor I INC AH191D 12 h t t p w w w w j e l n e t...

Page 13: ...19 LCD Color Monitor I INC AH191D 13 h t t p w w w w j e l n e t...

Page 14: ...19 LCD Color Monitor I INC AH191D 14 4 Input Output Specification 4 1 Input Signal Connector h t t p w w w w j e l n e t...

Page 15: ...19 LCD Color Monitor I INC AH191D 15 4 2 Factory Preset Display Modes h t t p w w w w j e l n e t...

Page 16: ...LCD that uses amorphous silicon TFT as a switching device This model is composed of a TFT LCD panel the voltage reference common voltage DC DC converter column and row driver circuit This TFT LCD has...

Page 17: ...19 LCD Color Monitor I INC AH191D 17 4 4 2 Optical Characteristics h t t p w w w w j e l n e t...

Page 18: ...19 LCD Color Monitor I INC AH191D 18 4 4 3 Parameter guide line for CCFL Inverter TFT LCD Module Back Light Unit h t t p w w w w j e l n e t...

Page 19: ...19 LCD Color Monitor I INC AH191D 19 5 Block Diagram 5 1 Software Flow Chat 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 h t t p w w w w j e l n e t...

Page 20: ...t it to green color Scalar initializes 10 In standby mode 11 Update the lifetime of back light 12 Check the analog port are there any signals coming 13 Does the scalar send out an interrupt request 14...

Page 21: ...2 1 Main Board LCD interface CN101 Scalar TSUM56AK Include MCU ADC OSD U401 D Sub Connector CN405 H sync V sync RGB Crystal 14 318MHz X401 EEPROM M24C02 U404 EEPROM M24C16 U403 DVI Connector CN406 Di...

Page 22: ...it R904 R931 R938 Transform er 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 pull circuit...

Page 23: ...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_12V PB 12 23 VC...

Page 24: ...702 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 meet current s...

Page 25: ...465 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 D425 RLZ36B 1...

Page 26: ...0 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 49 38 96 116 6...

Page 27: ...4 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 PA 0 7 NC NC RB1...

Page 28: ...1 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 C901 1000PF 250V...

Page 29: ...3 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 2007 OPT4 R805 47...

Page 30: ...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 GND ESD by jc...

Page 31: ...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 47uF 100V GND C2...

Page 32: ...19 LCD Color Monitor I INC AH191D 32 7 PCB Layout 7 1 Main Board h t t p w w w w j e l n e t...

Page 33: ...19 LCD Color Monitor I INC AH191D 33 h t t p w w w w j e l n e t...

Page 34: ...19 LCD Color Monitor I INC AH191D 34 7 2 Power Board h t t p w w w w j e l n e t...

Page 35: ...19 LCD Color Monitor I INC AH191D 35 h t t p w w w w j e l n e t...

Page 36: ...19 LCD Color Monitor I INC AH191D 36 7 3 Key Board 7 4 Audio Board h t t p w w w w j e l n e t...

Page 37: ...Maintainability 8 1 Equipments and Tools Requirement 1 Voltmeter 2 Oscilloscope 3 Pattern Generator 4 DDC Tool with an IBM Compatible Computer 5 Alignment Tool 6 LCD Color Analyzer 7 Service Manual 8...

Page 38: ...he picture is normal Please reinsert and make sure the AC of 100 240 is normal Measure U702 Vout 3 3V Q702 Vc 1 8V Reinsert or check the Adapter Inverter section X401 oscillate waveforms are normal Ch...

Page 39: ...eplace 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 Check reset circu...

Page 40: ...ite 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 OK Replace U40...

Page 41: ...ine 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 i...

Page 42: ...Check the output of PT801 PT802 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 have the output of square...

Page 43: ...ard 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 Switch Replace Keyp...

Page 44: ...roma 7120 indicator reached the value G 100 6 Adjust the BLUE of color 1 on factory window until chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until chroma 7120 RGB...

Page 45: ...19 LCD Color Monitor I INC AH191D 45 10 Monitor Exploded View h t t p w w w w j e l n e t...

Page 46: ...1730 6128 CR3 SCREW M3x6 M1G1730 6128 CR3 SCREW M3x6 M1G1730 6128 CR3 SCREW M3x6 M1G3030 5225 CR3 SCREW Q1G 330 8120 SCREW 3X8mm Q1G 330 8120 SCREW 3X8mm Q1G 330 12 47 CR3 SCREW 705GH9K0F34003 ASS Y 7...

Page 47: ...6W C211 65G 444101 5T 100 PF 10 50V Y5P C212 65G 444101 5T 100 PF 10 50V Y5P C203 65G 450104 7T 0 1UF 80 20 50V Y5V C213 65G 450104 7T 0 1UF 80 20 50V Y5V C204 67G 70478 9T 0 47UF 20 100V C206 67G 70...

Page 48: ...R419 61L0603000 RST SM 0603 JUMP MAX 0R R421 61L0603000 RST SM 0603 JUMP MAX 0R R721 61L0603000 RST SM 0603 JUMP MAX 0R R462 61L0603100 RST CHIP 10OHM 5 1 1 R463 61L0603100 RST CHIP 10OHM 5 1 1 R464 6...

Page 49: ...OHM 5 1 16 R425 61L0603103 CHIPR 10K OHM 5 1 16 R426 61L0603103 CHIPR 10K OHM 5 1 16 R432 61L0603103 CHIPR 10K OHM 5 1 16 R444 61L0603103 CHIPR 10K OHM 5 1 16 R450 61L0603103 CHIPR 10K OHM 5 1 16 R451...

Page 50: ...0 CHIPR 75 OHM 5 1 16W R440 61L0603750 CHIPR 75 OHM 5 1 16W R741 61L0805222 CHIP 2 2KOHM 5 0805 1 R738 61L1206222 RST CHIPR 2 2KOHM 5 C401 65G0603104 32 CHIP 0 1UF 50V X7R C404 65G0603104 32 CHIP 0 1U...

Page 51: ...G0603220 32 CHIP 22PF 50V X7R C715 65G0603223 32 CHIP 0 022UF 50V X7R 06 C716 65G0603223 32 CHIP 0 022UF 50V X7R 06 C417 65G0603224 22 CHIP 0 22UF 25V X7R C425 65G0603224 22 CHIP 0 22UF 25V X7R C444 6...

Page 52: ...RLZ36B BY ROHM D425 93G 39S 45 T RLZ36B BY ROHM D701 93G1004 4 SMAL140 D702 93G1004 4 SMAL140 D704 93G1004 4 SMAL140 715G1558 C BJ MAIN BOARD PCB SMTKEPC6QA6P KEY BOARD SMT CN003 33G3802 2H WAFER 2P R...

Page 53: ...PAG450VB100 M L18 35 5M C811 67G215V471 4K ED 470UF 25V C815 67G215V471 4K ED 470UF 25V C904 67G215V471 4K ED 470UF 25V C911 67G215V471 4K ED 470UF 25V C912 67G215V471 4K ED 470UF 25V C935 67G215V471...

Page 54: ...805103 CHIPR 10K OHM 5 1 10 R806 61L0805103 CHIPR 10K OHM 5 1 10 R812 61L0805103 CHIPR 10K OHM 5 1 10 R912 61L0805103 CHIPR 10K OHM 5 1 10 R815 61L0805104 CHIPR 100K OHM 5 1 10 R913 61L0805104 CHIPR 1...

Page 55: ...206104 CHIP 100KOHM 5 1 4W R938 61L1206104 CHIP 100KOHM 5 1 4W R807 61L1206220 CHIP 22OHM 5 8W R910 61L1206220 CHIP 22OHM 5 8W R818 61L1206300 RST CHIPR 30 OHM 5 1 R819 61L1206300 RST CHIPR 30 OHM 5 1...

Page 56: ...71 31 CHIP 470PF 50V NPO C831 65G0805471 31 CHIP 470PF 50V NPO C910 65G0805471 31 CHIP 470PF 50V NPO C809 65G0805473 32 CHIP 0 047UF 50V X7R C819 65G0805473 32 CHIP 0 047UF 50V X7R C810 65G080556131G...

Page 57: ...5G 90 23 TINCOATEDCOPPER JP820 95G 90 23 TINCOATEDCOPPER JP821 95G 90 23 TINCOATEDCOPPER JP901 95G 90 23 TINCOATEDCOPPER JP903 95G 90 23 TINCOATEDCOPPER JP904 95G 90 23 TINCOATEDCOPPER JP911 95G 90 23...

Page 58: ...RST MOFR 0 47OHM 5 2 96G 29 6 GP SHRINK TUBE UL CSA Q903 57G 667 21 STP10NK70ZFP AM1G1730 8128 GP SCREW M3 8 Q90G0035 1 HEAT SINK D908 93G 60252 SP20150 AM1G1730 8128 GP SCREW M3 8 Q90G0009 1 HEAT SI...

Page 59: ...19 LCD Color Monitor I INC AH191D 59 h t t p w w w w j e l n e t...

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