Table of Contents
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21.5" LCD Monitor
Service
Service
Service
Table Of Contents....................................................1
Revision List...................................................................2
Important Safety Notice.................................................3
1.Monitor Specification...................................................4
2.LCD Monitor Description.........................................5
3.Operation Instruction.................................................6
3.1.General Instructions..................................................6
3.2.Control Buttons and Connections...............................6
3.3.OSD Menu.................................................................8
4.Input/Output Specification.......................................12
4.1.Input Signal Connector..........................................12
4.2.Factory Preset Display Modes................................13
4.3.Panel Specification...........................................14
5.Block Diagram............................................................16
5.1.Main Board.....................................................16
5.2.Power Board..................................................17
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
Table of Contents
Page Description
6.Schematic..........................................................18
6.1.Main Board.......................................................18
6.2.Power Board....................................................22
6.3.Key Board.........................................................24
7.PCB Layout.........................................................25
7.1.Main Board......................................................25
7.2.Power Board.....................................................29
7.3.Key Board........................................................32
8.Maintainability.....................................................33
8.1.Equipments and Tools Requirement..................33
8.2.Trouble Shooting.............................................34
9.White-Balance,Luminance Adjustment.................38
10.Monitor Exploded View......................................40
11.BOM List......................................................42
SAFETY NOTICE
1
Envision H2276WDL
Horizontal Frequency
30- 83kHz
Page
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Summary of Contents for AOC Envision H2276WDL
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Page 1: Table Of Contents
21.5" LCD Monitor Envision H2276WDL Service Service Service Horizontal Frequency 30- 83kHz Table of Contents Description Page Description Page Table Of Contents…………………..…………………..…...1 6.Schematic…………..….........18 Revision List.…...........……..2 6.1.Main Board..…….…...........18 Important Safety Notice.….…......……..3 6.2.Power Board..……….........22 1.Monitor Specification......………....4 6.3.Key Board…....……........24 2.LCD Monitor Description……….……………………..5 7.PCB Layout..………..........25 3.Operation Instruction.…………....……...6... -
Page 2: Revision List
Revision List Version Release Date Revision History TPV Model Name May.21.2012 Initial release TIBAHG2TAJE1HN... -
Page 3: Important Safety Notice
Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended. -
Page 4: Monitor Specification
1. Monitor Specifications Model number H2276WDL Driving system TFT Color LCD Viewable Image Size 54.7 cm diagoanl Pixel pitch 0.248mm(H) x 0.248mm(V) LCD Panel Video R, G, B Analog lnterface Separate Sync. H/V TTL Display Color 16.7M Colors Dot Clock 148.5MHz Horizontal scan range 30kHz - 83kHz... -
Page 5: Lcd Monitor Description
2. LCD Monitor Description The LCD monitor will contain a main board, a power board and a key board which house the flat panel control logic, brightness control logic and DDC. The power part will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage. -
Page 6: Operation Instruction
3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. * The power cord should be connected. -
Page 7: Connecting The Monitor
Connecting the Monitor Cable Connections On Back of Monitor and Computer: 1. Power 2. DVI 3. D-SUB To protect equipment, always turn off the PC and LCD monitor before connecting. 1. Connect the power cable to the AC port on the back of the monitor. 2. -
Page 8: Osd Menu
3.3 OSD Menu 1) Press the MENU-button to activate the OSD window. 2) Press - or + to navigate through the functions. Once the desired function is highlighted, press the MENU-button to activate sub-menu . Once the desired function is highlighted, press MENU-button to activate it. 3) Press - or + to change the settings of the selected function. - Page 9 Function Control Illustration...
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Page 12: Input/Output Specification
4. Input/Output Specification 4.1 Input Signal Connector Analog connectors Pin Number 15-Pin Side of the Signal Cable Video-Red Video-Green Video-Blue Ground Detect Cable GND-R GND-G GND-B Ground Ground DDC-Serial data H-sync V-sync DDC-Serial clock DVI connectors Pin No. Signal Name Pin No. -
Page 13: Factory Preset Display Modes
4.2 Factory Preset Display Modes Standard Resolution H. Frequency(kHz) V. Frequency(Hz) 640×480 @60Hz 31.469 59.940 640×480 @67Hz 35.000 66.667 640×480 @72Hz 37.861 72.809 640×480 @75Hz 37.500 75.000 Dos-mode 720×400 @70Hz 31.469 70.087 800×600 @56Hz 35.156 56.250 800×600 @60Hz 37.879 60.317 SVGA 800×600 @72Hz 48.077... -
Page 14: Panel Specification
4.3 Panel Specification 4.3.1 General Features M185BGE-L22 is a 18.5” TFT Liquid Crystal Display module with WLED Backlight unit and 30 pins 1ch-LVDS interface. This module supports 1366 x 768 HD mode and can display up to 16.7M colors. The converter module for Backlight is not built in.. - Page 15 4.3.4 Backlight Unit Value Parameter Symbol Unit Typ. Max. Light Bar Input Voltage 49.5 Light Bar Input Current Power Consumption 11.9 LED Lif Time 30000 IFP LED Peak forward current 4.3.5 Optical Characteristics Item Unit Conditions Min. Typ. Max. Horizontal (Right) CR = 10 (Left) Viewing Angle [degree]...
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Page 16: Block Diagram
5. Block Diagram 5.1 Main Board Key Control LCD Interface interface (CN410) (CN406) Scalar IC HX6822-A Crystal EEPROM (Include MCU, ADC, OSD) 12MHz MX25L2026DM1I-12G (U401) (X401) (U402) DDC2-SDA DDC2-SCL D-HS D-VS EEROM EEROM FM24C02A FM24C02A (U101) (U104) DDC1-SCL DDC1-SDA D-SUB Connector Connector (CN101) -
Page 17: Power Board
5.2 Power Board AC input 14.5V Transformer Bridge Rectifier EMI filter Rectifier (T901) diodes and Filter Start Resistor (R926) Feedback Power Switch PW Control Circuit (Q903) LD7904JGP (IC901) Photo coupler (IC902) 14.5V L801 D801 (CN804) Q801 PWM Control OZ9998BGN ON/OFF (U801) -
Page 18: Schematic
6. Schematic 6.1 Main Board 715G5306M01000004L 10R 1/16W 5% VGA_B+ R101 R103 C102 DSUB_B+ 0R05 1/10W 47N 16V ESD_VGA D_HS R114 0R05 1/10W R117 470R 1/16W 5% C104 R102 C101 DSUB_H D_VS R118 470R 1/16W 5% NC/5PF 50V 5PF 50V DSUB_V 75 OHM +-5% 1/16W U103... - Page 19 VCC3IO VDDD_AD VCCK VCC3.3 VCC3IO VCC3.3 AVDD3V VDDP_AD AVDD3V_LV VCCP FB401 FB402 DVCC AVDD3V 3,4,5 VCC3.3 300OHM 300OHM C406 C407 C408 C409 C410 VDDP_AD VCC3.3 FB403 VCC3.3 FB405 AVDD3V_LV 300OHM Mute GPIO26 100R 1/16W 5% R450 C709 C411 300OHM WP_DDC GPIO27 PB[0..9] C412...
- Page 20 PA[0..9] PA[0..9] CN411 CN410 LVB3P LVB3N LVB0N RXO0- LVBCKP LVB0P RXO0+ LVBCKN LVB0N RXO0- RXO0+ LVB0P LVB1N RXO1- LVB2P LVB1N RXO1- RXO1+ LVB1P LVB1P RXO1+ LVB2N LVB2N RXO2- RXO2+ LVB2P LVB2N RXO2- LVB1P LVBCKN RXOC- RXOC+ LVBCKP LVB2P RXO2+ LVB1N LVB3N RXO3- RXO3+...
- Page 21 VCC3.3 CN701 R703 C703 C701 100N 16V 10K 1/16W 5% R704 100uF16V BKLT-EN 10K 1/16W 5% BKLT-VBRI BKLT-EN C702 Volume# NC/100N 16V R705 Mute R701 on_BACKLIGHT 3 22K 1/16W 5% Volume# 100R 1/16W 5% Q701 R702 LMBT3904LT1G Mute CONN 470R 1/16W 5% R708 VCC3.3 NC/10K 1/16W 5%...
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Page 22: Power Board
6.2 Power Board 715G4452P01001001S R904 100 OHM 1/4W L903 C900 R905 100 OHM 1/4W +14.5V 1000PF/250VAC C910 C919 2N2 500V 2N2 500V R906 100 OHM 1/4W 3.5uH R918 ZD901 250R MTZJ T-72 18B C912 D903 SR510-22 680uF25V T901 POWER X'FMR R916 470 OHM +-5% 1/10W BD901... - Page 23 D801A NC/SR510-22 FB802 D801 L801 +14.5V 47UH BEAD R804 C801 C814 BR310 330uF 25V 100N 50V 10 OHM 1/8W Q801 R801 APM1105NUC C810 10K 1/4W NC/0.47UF 50V R815 1M 1% 1/8W ON/OFF R814 R802 C809 R805 300K 1/8W 4.7UF 100V C811 C802 NC/0.47UF 50V...
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Page 24: Key Board
6.3 Key Board 715G4407K02000001S LED_1# LED_2# LED01 CN001 R002 2KOHM 1% 1/10W LBADC2 LBADC1 POWER R003 3K +-% 1/10W LED_1# LED_2# R004 3K +-% 1/10W ZD007 ZD006 C003 RLZ5.6B C004 R005 2KOHM 1% 1/10W NC/0.1uF 50V Wire Harness RLZ5.6B NC/0.1uF 50V SGND SW001 SW002... -
Page 25: Pcb Layout
7. PCB Layout 7.1 Main Board 715G5306M01000004L... -
Page 29: Power Board
7.2 Power Board 715G4452P01001001S... -
Page 32: Key Board
7.3 Key Board 715G4407K02000001S 、... -
Page 33: Maintainability
8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual. -
Page 34: Trouble Shooting
8.2 Trouble Shooting 1. No Power No power Check power cable is Re-plug the power cable tigtened? Check Power “On/Off” Turn on the Power “On/Off” switch is “On”? Check the LED Check the AC power indicate is OK? Replace the power board and check connections Replace main board and check connections Replace key board and check connections... - Page 35 2. No Video (Power LED Blue) No Video (Power LED Blue) Press the power Replace the main board button is OK? Replace the power The end board and connection Replace the main The end board and connection Replace the LVDS/FFC Check the LVDS/FFC cable or panel (T901)
- Page 36 3. DIM DIM (image overlap, focus or flicker) The end Reset in factory mode Set to the optimal The end frequency, select the recommended frequency Readjust the phase and pixel The end clock in the user mode Pull out signal cable and Check the signal cable check “Self Test Feature and the PC...
- Page 37 4. Color is not optimal Color is not optimal Color shift Miss color Reset the factory mode Replace the signal cable In the user mode, set the” color settings” until customer satisfy The end Pull out the signal cable and check the screen color display is normal? Replace the signal cable or PC Replace the main board...
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Page 38: White-Balance,Luminance Adjustment
9. White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. How to setting MEM channel you can reference to chroma 7120 user guide or simple use “SC” key and “NEXT” Key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust . - Page 39 5. Adjust the GREEN on factory window until chroma 7120 indicator reached the value G=100 6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100 7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2 D.
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Page 40: Monitor Exploded View
10. Monitor Exploded View... - Page 41 Description BEZEL KEY BOARD LCD M215HW03 V1T0 WH AUO 999-N/A 999 FFC CONN 1.0mm 30P R/A 34mm HARNESS 9P-9P(2008) 100mm MAIN BOARD MAINFRAME SGCC PLATE HINGE REAR_COVER HINGE 21.5"_ vss1 COVER_STAND STAND BASE Part No. Description FOOT PAD 0D1G1030 6120 SCREW(MB/MAIN_FRAME) INSULATING SHEET AM1G1740 10225 CR3...
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Page 42: Bom List
052G 1185 1 BIG TAPE(Y1200141) E750 750GBU215H311HN000 LCD M215HW03 V1T0 WH AUO 999-N/A 999 756GQBCB0AA1600000 MAIN BOARD-CBPCBHGA1QH SMTCB-U402 100GAHAI00EYT1 MCU ASS'Y-056G2233501 L215WA-VS1-VSS10 ENVISION H2276WDL 801GQBEE580 ASS'Y 0D1G1030 6120 screw 0M1G1040 6120 SCREW A15G1746101101 YM MAINFRAME SGCC A15G1750101 PLATE HINGE A37G0282011 HINGE 21.5"_ vss1... - Page 43 CN410 033G801930F CH JS FFC CONN 1.0mm 30P R/A 34mm 6.3mm CN101 088G 35315F HC D-SUB CONN 15P WITH SCREW 2nd source CN101 088G 35315F HD D-SUB CONN 15P BLUE - R/A CN102 088G 35424F C DVI 24PIN CONN F attached Screw CN102 088G 35424F D DVI CONN SCREWED 24P R/A...
- Page 44 R133 061G0402100 JI TEST ONLY RST 0402 10R 5% 1/16W TA-I R132 061G0402100 JI TEST ONLY RST 0402 10R 5% 1/16W TA-I R131 061G0402100 JI TEST ONLY RST 0402 10R 5% 1/16W TA-I R113 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R108 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN...
- Page 45 R428 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R425 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R414 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R402 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R716 061G0402104 JI TEST ONLY RST 0402 100K 5% 1/16W TA-I...
- Page 46 R121 061G0402472 JI TEST ONLY RST CHIP 4.7K 5% 1/16W TA-I R713 061G0402472 JI TEST ONLY RST CHIP 4.7K 5% 1/16W TA-I R706 061G0402472 JI TEST ONLY RST CHIP 4.7K 5% 1/16W TA-I R140 061G0402472 JI TEST ONLY RST CHIP 4.7K 5% 1/16W TA-I R139 061G0402472 JI TEST ONLY RST CHIP 4.7K 5% 1/16W TA-I...
- Page 47 C418 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C419 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C420 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C421 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C446 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C703 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10%...
- Page 48 C405 065G040233031J CAP CHIP 0402 33P 50V NP0 +/-5% C113 065G040247312K CHIP CAP 47NF16V X7R 10% C112 065G040247312K CHIP CAP 47NF16V X7R 10% C109 065G040247312K CHIP CAP 47NF16V X7R 10% C108 065G040247312K CHIP CAP 47NF16V X7R 10% C103 065G040247312K CHIP CAP 47NF16V X7R 10% C102 065G040247312K CHIP CAP 47NF16V X7R 10%...
- Page 49 ZD103 093G 39GA01 T RLZ5.6B ZD104 093G 39GA01 T RLZ5.6B ZD101 093G 39S 24 T RLZ 5.6B LLDS ZD102 093G 39S 24 T RLZ 5.6B LLDS ZD103 093G 39S 24 T RLZ 5.6B LLDS ZD104 093G 39S 24 T RLZ 5.6B LLDS E715 715G5306M01000004L MAIN PCB FR4 DS 80*72*1.6MM...
- Page 50 L905 073G 253191 H IND CHOKE 1.1uH DADON L801 073G 253242 CP CHOKE COIL 47UH 10% L040462-6 2.5A T901 080GL19P 39 CP X'FMR 950UH 10% 20UH EFD25 T020543-6 CN901 087G 50132C HC AC Socket R/A 3P DB-14-05C BD901 093G 50460517 BRIDGE 2KBP08M-70 2A 800V KBP 80A D906 093G 60923...
- Page 51 R915 061G08053002FT RST CHIP 30K 1/8W 1% R803 061G0805304 JF RST CHIPR 300KOHM +-5% 1/8W FENGHUA R802 061G0805304 JF RST CHIPR 300KOHM +-5% 1/8W FENGHUA R802 061G0805304 JI RST CHIPR 300K OHM +-5% 1/8W R803 061G0805304 JI RST CHIPR 300K OHM +-5% 1/8W R927 061G0805622 JT RST CHIPR 6K2 +-5% 1/8W TZAI YUAN...
- Page 52 C802 065G080510332K CAP 0805 10NF K 50V X7R C802 065G080510332K CAP CHIP 0805 10N 50V X7R +/-10% C814 065G080510432K CAP CHIP 0805 100N 50V X7R +/-10% C917 065G080510432K CAP CHIP 0805 0.1UF K 50V X7R C915 065G080510432K CAP CHIP 0805 0.1UF K 50V X7R C901 065G080510432K CAP CHIP 0805 0.1UF K 50V X7R...
- Page 53 J9007 095G 90 23 JUMP WIRE - - R918 061G152M25152T SY RST MOF 250R 5% 2W C921 065G500K4722HT CAP CER 4.7NF 10% 50V X7R C816 065G517K102 2T6921 CAP CER 1000PF K 500V Y5P J9014 095G 90 23 JUMP WIRE - - J9009 095G 90 23 JUMP WIRE - -...