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21" LCD Monitor
Service
Service
Service
Description
Table Of Contents....................................................1
Revision List...................................................................2
Important Safety Notice.................................................3
1.Monitor Specification...................................................5
2.LCD Monitor Description.........................................6
3.Operation Instruction.................................................7
3.1.General Instructions..................................................7
3.2.Control Buttons and Connections...............................7
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........................................................33
8.Maintainability.....................................................34
8.1.Equipments and Tools Requirement..................34
8.2.Trouble Shooting.............................................35
9.White-Balance,Luminance Adjustment.................39
10.Monitor Exploded View......................................40
11.BOM List......................................................43
SAFETY NOTICE
1
Envision H2076DL
Horizontal Frequency
30- 83kHz
Page
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Summary of Contents for AOC Envision H2076DL
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Page 1: Table Of Contents
21" LCD Monitor Envision H2076DL 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......………....5 6.3.Key Board…....……........24 2.LCD Monitor Description……….……………………..6 7.PCB Layout..………..........25 3.Operation Instruction.…………....……...7... -
Page 2: Revision List
Revision List Version Release Date Revision History TPV Model Name May.21.2012 Initial release TABSHG2TAJA1HN... -
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 H2076DL Driving system TFT Color LCD Viewable Image Size 50.8 cm diagoanl Pixel pitch 0.2768mm(H) x 0.2768mm(V) LCD Panel Video R, G, B Analog lnterface Separate Sync. H/V TTL Display Color 16.7M Colors Dot Clock 140MHz 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: General Instructions
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... -
Page 13: Factory Preset Display Modes
4.2 Factory Preset Display Modes... -
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 VLED 29.3 35.2 Light Bar Input Current mA DC Power Consumption PLED LED Lif 30000 Time IFP LED Peak forward current ILED mA DC 4.3.5 Optical Characteristics Item Symbol Condition...
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Page 16: Block Diagram
5. Block Diagram 5.1 Main Board Key Control LCD Interface interface (CN410) (CN408) 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 M24C02 M24C02 (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 (R911) Feedback Power Switch PW Control Circuit (Q901) LD7576AGR (U901) Photo coupler (U902) 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 10R 1/16W 5%... - Page 19 VCC3IO VDDD_AD VCCK VCC3.3 VCC3IO VCC3.3 AVDD3V VDDP_AD AVDD3V_LV VCCP FB401 FB402 AVDD3V DVCC 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 C701 C703 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# NC/100R 1/16W 5% Q701 R702 LMBT3904LT1G Mute CONN NC/470R 1/16W 5% R708 VCC3.3 NC/10K 1/16W 5%...
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Page 22: Power Board
6.2 Power Board 715G4497P03000001M R929 100 OHM 1/4W FB803 BD901 C916 2.2N 630V F801 R930 100 OHM 1/4W 0R05 1/4W +14.5V R903 100 OHM 1/4W C928 2.2N 630V BEAD R904 ZD901 250R MTZJ T-72 20B KBP306G-05 D901 C918 680UF 25V R905 D902 470OHM +-5% 1/8W... - Page 23 D801A SR3100 FB802 D801 L801 CN803 +14.5V C801 47UH BEAD Q801 R804 330UF25V C814 NC/SK310B 100N 50V 10 OHM 1/8W APM8005KCTRG C810 0.47UF 50V R801 R815 R819 R820 R821 R822 NC/CONN C809 1MOHM +-1% 1/8W NC/0 ohm NC/0 ohm NC/0 ohm ON/OFF R814 4.7UF 100V...
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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 28: Power Board
7.2 Power Board 715G4497P03000001M... -
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 LTM200KT10 Y01 FQ SEC FFC CONN 1.0mm 30P R/A 34mm 6mm HARNESS 9P(SCN)-9P(2008) 100MM MAIN BOARD-CBPCBHGA3QS MAIN_FRAME B PLATE HINGE REAR_COVER HINGE 20 COVER_STAND STAND BASE Part No. Description FOOT PAD 0D1G1030 6120 SCREW(MB/MAIN_FRAME) INSULATING SHEET AM1G1740 10225 CR3 SCREW(COVER_STAND/HINGE) POWER BOARD...
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Page 42: Bom List
11. BOM List Note: The parts information listed below are for reference only, and are subject to change without notice. Please go to http://cs.tpv.com.cn/hello1.asp for the latest information. TABSHG2TAJA1HN location Part No. Description Remark 040G 58162461A EPA LABEL E08902 089G 725GAADBD D-SUB CABLE 1500MM E08903 089G1745CAA AC... - Page 43 C706 067G 3051013PB EC 105C 100uF M 16V 5*11mm JH CD263 C709 067G 3051013PB EC 105C 100uF M 16V 5*11mm JH CD263 C708 067G 3051013PB EC 105C 100uF M 16V 5*11mm JH CD263 C445 067G 3051013PB EC 105C 100uF M 16V 5*11mm JH CD263 U401 056G 562A30 SCALER HX6822-A080LAG LQFP-100...
- Page 44 R132 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R131 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R130 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R129 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R128 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN...
- Page 45 R415 061G0402153 JI RST 0402 15K 5% 1/16W R415 061G0402153 JT RST CHIP 15K 1/16W 5% TZAI YUAN R407 061G0402220 JI RST 0402 22R 5% 1/16W TA-I R405 061G0402220 JI RST 0402 22R 5% 1/16W TA-I R404 061G0402220 JI RST 0402 22R 5% 1/16W TA-I R407 061G0402220 JT RST CHIP 22R 1/16W 5% TZAI YUAN...
- Page 46 R706 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 R121 061G0402472 JT RST CHIP 4K7 1/16W 5% TZAI YUAN R122 061G0402472 JT RST CHIP 4K7 1/16W 5% TZAI YUAN R139 061G0402472 JT RST CHIP 4K7 1/16W 5% TZAI YUAN...
- Page 47 C414 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C410 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C409 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C803 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C711 065G040210412K CAP CHIP 0402 100N 16V X7R +/-10% C415 065G040210412K CAP 0402 100NF 10% 16V X7R...
- Page 48 C102 065G040247312K CAP 0402 47NF 10% 16V X7R C103 065G040247312K CAP 0402 47NF 10% 16V X7R C108 065G040247312K CAP 0402 47NF 10% 16V X7R C109 065G040247312K CAP 0402 47NF 10% 16V X7R C112 065G040247312K CAP 0402 47NF 10% 16V X7R C113 065G040247312K CAP 0402 47NF 10% 16V X7R...
- Page 49 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 KEPCBQM6 KEY BOARD CN001 095G820H 6W526...
- Page 50 L901 073G 174 65 S2 LINE FILTER 30mH MIN L906 073G 253 91 V1 CHOKE COIL 1.1UH 30% 3LFDR0810-1R0K, HF L906 073G 253191 H IND CHOKE 1.1uH DADON L801 073G 253214 X CHOKE COIL 47UH 10% ,HF L801 073G 253214 DN CHOKE COIL 47UH 10% LZ.CC013.G01 2.5A T901 080GL22T 3 N3...
- Page 51 R928 061G08051001FF RST CHIPR 1KOHM +-1% 1/8W FENGHUA R928 061G08051001FT RST CHIP 1K 1/8W 1% R815 061G08051003FF RST CHIPR 100KOHM +-1% 1/8W FENGHUA R815 061G08051003FT RST CHIP 100K 1/8W 1% R806 061G0805102 JF RST CHIPR 1K OHM +-5% 1/8W FENGHUA R907 061G0805102 JF RST CHIPR 1K OHM +-5% 1/8W FENGHUA...
- Page 52 R908 061G1206103 JF RST CHIPR 10KOHM +-5% 1/4W FENGHUA R908 061G1206103 JT RST CHIPR 10KOHM +-5% 1/4W TZAI YUAN R911 061G1206103 JT RST CHIPR 10KOHM +-5% 1/4W TZAI YUAN R923 061G1206221 JF RST CHIPR 220 OHM +-5% 1/4W FENGHUA R923 061G1206221 JT RST CHIPR 220 OHM +-5% 1/4W TZAI YUAN R923...
- Page 53 C917 065G120622272K CAP 1206 2.2NF 10% 500V X7R C916 065G120622272K CAP 1206 2.2NF 10% 500V X7R C929 065G120622272K CER 1206 2N2 500V X7R 10% C928 065G120622272K CER 1206 2N2 500V X7R 10% C917 065G120622272K CER 1206 2N2 500V X7R 10% C916 065G120622272K CER 1206 2N2 500V X7R 10%...
- Page 54 C920 067G 2046812KT CAP CS 680UF 20% 10V 8*11 3900mA GP1A6 C920 067G 2046812LT CAP CS 680UF 20% 10V 8*11.5 CN901 006G 31500 EYELET D903 093G 6026T52T CTIFIER DIODE FR107 D903 093G110050152T DIODE PR1007 1A/1000V 500ns DO-41 D904 093G110050152T DIODE PR1007 1A/1000V 500ns DO-41 D904 093G 6026T52T CTIFIER DIODE FR107...
- Page 55 Q51G 6 4509 GLUE_RTV T901 S80GL22T3V3 Transformer Ass'Y 034FP22T3V3 线包 071FPC28101 08 磁芯 PC40 ER2828 A280 Q34G7476AEDA2B0100 BEZEL Q34G7477 GMA7K0130 REAR_COVER Q40G000267382B warranty card for taiwan Q40G000367340B POP LABEL FOR G2263wL Q40G018N67305B RATING LABEL TW Q44GAA2467301A00JM ARTWORK CARTON H2076DL WW Q45G8801607 14 P.E.