Service manual

ManualsBrandsAOC ManualsComputer equipmente2050Sda

20" LCD Monitor AOC e2050Sda

Horizontal Frequency

30 - 83kHz

Table of Contents

Description Page Description Page

SAFETY NOTICE

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.

Service

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

R FOR TH

UNIT WHEN S

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 Setting…..........................................................8

4.Input/Output Specification...............……………….......24

4.1.Input Signal Connector...............………..................24

4.2.Preset Display Modes……..........................25

4.3.Panel Specification…………..………………………..26

5.Block Diagram….........................................................29

5.1.Main Board…..….............................................29

5.2.Power Board…………..…………………………......30

6.Schematic…………..….........................................31

6.1.Main Board..…….…...........................................31

6.2.Power Board..……….........................................36

7.PCB Layout..………..............................................38

7.1.Main Board………..…........................................38

7.2.Power Board….…..............................................40

7.3.Key Board………..…..........................................42

8.Maintainability………............................................43

8.1.Equipments and Tools Requirement…...............43

8.2.Trouble Shooting…..………...............................44

9.White-Balance,Luminance Adjustment…............48

10.Monitor Exploded View……................................50

11.BOM List…………..……………………….............51

Summary of content (64 pages)

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20" LCD Monitor AOC e2050Sda Service Service Service Horizontal Frequency 30 - 83kHz Table of Contents Description Page Description Page Table of Contents…………………..…………………..…...1 6.Schematic…………..….........................................31 Revision List.…...................................................……......2 6.1.Main Board..…….…...........................................31 Important Safety Notice.….….............................……......3 1.Monitor Specification.............................
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Revision List Version Release Date Revision History TPV Model Name TAB2N26EAGA1DNE TABMN26EAGA1DNE A00 Aug.-12-2011 Initial release TABGN26BAGA1DNE TAB2N26BAGA1DNE TABGN26EAGA1DNE A01 Oct.-24-2011 Add new model TABMN26QAGA15NE TAB2N26BDFA1DAE TAB2N26EAGA1DAE TACSN26BDFA2DNE TACSN26BDFA1DNE TACSN26EAGA2DNE TACSN26EAGA2DNE TACSN26EAGA2DNE A02 Nov.
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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.
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1.
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2.LCD Monitor Description The LCD monitor will contain a main board, an adapter board, a converter 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. Monitor Block Diagram LED Drive.
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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 (See Figure ). By changing these settings, the picture can be adjusted to your personal preferences. * The power cord should be connected. * Press the power button to turn on the monitor. The power indicator will light up. 3.2 Control Buttons and Connections Power Press the Power button to turn on/off the monitor.
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1. Power 2. Analog (DB-15 VGA cable) 3. DVI 4. Audio 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 Connect one end of the 15-pin D-Sub cable to the back of the monitor and connect the other end to the computer's D-Sub port. 3. Connect one end of the DVI cable to the back of the monitor and connect the other end to the computer‟s DVI port.
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3.3 OSD Setting Basic and simple instruction on the control keys. 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 it. press - or + to navigate through the sub-menu functions. Once the desired function is highlighted, press MENU-button to activate it. 3) Press - or + to change the settings of the selected function. Press AUTO to exit.
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Luminance 1 Press (Menu) to display menu. 2 Press or to select (Luminance), and press to enter. 3 Press or to select submenu, and press or to adjust. to enter.
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5 Press two times to exit.
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Image Setup 1 Press (Menu) to display menu. 2 Press or to select (Image Setup), and press to enter. 3 Press or to select submenu, and press or to adjust. to enter.
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Press two times to exit.
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Color Setup 1 Press (Menu) to display menu. 2 Press or to select (Color Setup), and press to enter. 3 Press or to select submenu, and press or to adjust. to enter.
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Press two times to exit.
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Picture Boost 1 Press (Menu) to display menu. 2 Press or to select (Picture Boost), and press or to select submenu, and press or to adjust. 3 Press to enter. 4 Press 15 to enter.
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5 Press two times to exit.
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OSD Setup 1 Press (Menu) to display menu. 2 Press or to select (OSD Setup), and press or to select submenu, and press or to adjust. 3 Press to enter. 4 Press 17 to enter.
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5 Press two times to exit.
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Extra 1 Press (Menu) to display menu. 2 Press or to select (Extra), and press to enter. 3 Press or to select submenu, and press to enter. 4 Press or to adjust.
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5 Press two times to exit.
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Exit 1 Press (Menu) to display menu. 2 Press or to select (Exit), and press to enter.
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LED Indicators Status LED Color Full Power Mode Green or Blue Active-off Mode Orange or red e-Saver Welcome to use AOC e-Saver monitor power management software! The AOC e-Saver features Smart Shutdown functions for your monitors, allows your monitor to timely shutdown when PC unit is at any status (On, Off, Sleep or Screen Saver); the actual shutdown time depends on your preferences (see example below). Please click on "driver/e-Saver/setup.
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Question e-sensor no power interface show e-sensor Answer 1. Into the factory mode，set Burn in to OFF; 2. Set e-sensor to ON. The detecting range is too near or far and the User is far away the monitor, reset the examination area. 1. Please do not block the e-Sensor on the LOGO, which is located on it can’t your monitor to turn off or dark while you are away the left of AOC logo. 2. The detecting range is too far or the things blocks monitor , reset the examination area.
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4. Input/Output Specification 4.
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4.
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4.3 Panel Specification 4.3.1 General Features LM200WD3-TLC1 is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode(LED) backlight system. The matrix employs a-Si Thin Film Transistor as the active element.It is a transmissive type display operating in the normally white mode. It has a 20.
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Note : 1. The specified current and power consumption are under the VLCD=5.0V, 25  2°C,fV=60Hz condition whereas mosaic pattern(8 x 6) is displayed and fV is the frame frequency. 2. The current is specified at the maximum current pattern. 3. Permissive power ripple should be measured under VCC=5.0V, 25°C, fV (frame frequency)=75Hz condition and At that time, we recommend the bandwidth configuration of oscilloscope is to be under 20MHz. 4.
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4.3.4 Optical Characteristics Ta= 25°C, VLCD=5.0V, fV=60Hz fCLK=54.
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5. Block Diagram 5.1 Main Board 04.SCALER 02.INPUT +5V EDID_WP R0+ R0SOG_DET G0+ G0B0+ B0AHS0 AVS0 DDCSDA1 DDCSCL1 VGA_CABLE_DET AVS0 DDCSDA1 DDCSCL1 VGA_CABLE_DET R0+ R0SOG_DET G0+ G0B0+ B0AHS0 AVS0 VCC3.3 DDCSDA1 DDCSCL1 PA[0..9] VCC1.8 +5V PA[0..9] PA[0..9] VGA_CABLE_DET 02.D-SUB INPUT PB[0..9] EDID_WP 05.PANEL INTERFACE PB[0..9] PB[0..9] EDID_WP P_SCL P_SCL P_SDA P_SDA VLCD VLCD 05.PANEL INTERFACE 03.
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5.2 Power Board EMI filter Bridge Rectifier and Filter Transformer (T901) Rectifier diodes 14.5V 5V Start Resistor (R908,R911) Feedback PWM Control LD7576AGR (U901) Circuit Power Switch (Q901) Photo coupler Regulator (U902) 14.
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6. Schematic 6.1 Main Board DDCSCL1 R101 DDCSCL_A 100R 1/16W 5% VSIN0 5 DDCSCL1 14 HSIN0 5 DDCSDA1 DET_VGA D-SUB 15P 10 5 9 4 8 3 7 2 6 1 15 13 DDCSDA1 R106 DDCSDA_A 100R 1/16W 5% CN101 12 11 R102 100R 1/16W 5% VGA_CABLE_DET VGA_CABLE_DET 5 VGA_5V VGA_5V BIN0BIN0 GIN0GIN0 RIN0RIN0 R103 0R05 1/16W BIN0 ZD101 RLZ5.
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26 25 GND GND 18 17 10 9 2 1 13 12 5 4 21 20 23 24 1K 1/16W 5% U104 NC Q101 CH1 CH4 VN VP CH2 CH3 6 5 4 ESD_DVI ESD_DVI 2 1 D102 BAV70 R134 R135 R136 R137 R138 R139 ESD_DVI 10R 10R 10R 10R 10R 10R 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 5% 5% 5% 5% 5% 5% RX0+ RX0RX1+ RX1RX2+ RX2- 5 5 5 5 5 5 8 7 6 5 DDCSCL2 5 DDCSDA2 5 EDID_WP DCLK+ DCLK- ESD_DVI C116 U105 C115 RLZ5.
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PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 PB8 PB9 C403 100N 16V R402 R403 LVB3P LVB3M LVBCKP LVBCKM LVB2P LVB2M LVB1P LVB1M LVB0P LVB0M 1 3 5 7 NC/2K2 1/16W 5% NC/2K2 1/16W 5% 2 4 6 8 VCC3.3 CN401 NC/8PIN VCC3.3 C421 4.7UF 10V C0805 C418 100N 16V C419 100N 16V RX2+ RX2RX1+ RX1RX0+ RX0RXC+ RXC- RX2+ RX2RX1+ RX1RX0+ RX0RXC+ RXC- 3 AHS0 3 AVS0 C422 100N 16V 3 SOG_DET 3 G0+ 3 G0- C423 4.
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PA[0..9] PB[0..9] 5 PB[0..
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+5V +5V VCC3.3 C701 R702 4K7 1/16W 5% +5V 4 INPUT OUTPUT 4 FB701 0 OHM +-5% 1/8W 2 1 ADJ/GND + VCC3.3 5 100N 16V C704 3,4,5 +5V DIM ON/OFF AZ1117H-3.3TRG1 100uF16V C702 NC/CONN VCC3.3 U701 3 C703 100N 16V 6 5 4 3 2 1 100N 16V +5V 3,4,5 CN701 R703 9 8 7 6 5 4 3 2 1 100R 1/16W 5% Adj_BACKLIGHT 5 + C706 U702 VCC3.
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6.2 Power Board Adapter 715G4744P01000001C ! 1 R929 100 OHM 1/4W C916 R930 100 OHM 1/4W 2N2 500V C928 2N2 500V F801 0R05 1/4W +14.
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Converter 715G4013P01002004S +12V D801 L801 0R05 4A 1/4W 1 DIM ON/OFF SK310B U801 R818 0R05 1/4W ON/OFF R806 1K 1/10W DIM R808 1K 1/10W C802 68NF 50V C811 100pF 50V R807 20K 1/10W R810 20K 1/10W C808 NC R802 200KOHM 1/10W R803 R819 33K 1/10W 33K 1/10W +14.5V R804 100K 1/10W R824 NC R825 NC Gate Q801 D2 D2 D1 D1 8 7 6 5 C803 0.22uf 50V Q806 APM8005 R801 + C807 4.7UF 100V R805 300KOHM 1/10W C804 0.
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7. PCB Layout 7.
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7.
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Converter 715G4013P01002004S 41
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7.
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8. 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. User Manual.
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8.2 Trouble Shooting 1.
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2.
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3.
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4.
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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 . 1. Setting the color temp. A. 6500K: x=313±30 ，y=329±30 Warm color temp. parameter is B. 7300K Normal color temp.
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B. Adjust Normal (7300K) color-temperature 1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM.channel to Channel 4(with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x=302±30 ，y=318±30 4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100 5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100 6.
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10.
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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. TAB2N26EAGA1DNE Location Part No. 052G 1207 A Aluminum Foil Tape 052G 1211 B Conductive Tape 85mm *40mm *0.09mm 052G 2191 A PAPER TAPE 052G6019 HDCP-SMT Description 1 INSULATING TAPE 070GHDCP500HDC HDCP CODE E07801 078G025A553 VA SPEAKER 4 OHM 2.
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Q40G 58162435A H LABEL Q45G 76 28 A PE BAG FOR MANUAL Q50G 4 10 TIE (Y1900221) Q52G 1185 99 TAPE Q52G6019 14 TAPE E09504 S95G176T6W01 FFC CABLE 6P 215 1.0 2nd source E09501 S95G179T30NE37 FFC CABLE P1.
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E08901 089G404A15N IS AC POWER CORD 1500 H26G 800504 2B barcode H40G 18N61562A e950Sw INA ID LABEL H40G0002615 9A e2050Sda 印尼 carton label H41G1800615 1B 印尼 manual H41G780061583A 印尼 warranty card 808GE2050SDAPHI E2050SDA Philippines ASS'Y E08904 089G 173 56 4B AUDIO CABLE E08902 089G 715CAAE01 SIGNAL CABLE 2nd source E08902 089G 715GAAE01 SIGNAL CABLE 2nd source E08902 089G 715HAAE01 SIGNAL CABLE E08903 089G1745CAA 9 DVI CABLE E08903 089G1745GAA 9 DVI CABLE E08903 089G1
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808GE2050SDATPE E2050SDA Chinese Taipei ASS'Y E08904 089G 173 56 4B AUDIO CABLE E08902 089G 715CAAE01 SIGNAL CABLE 2nd source E08902 089G 715GAAE01 SIGNAL CABLE 2nd source E08902 089G 715HAAE01 SIGNAL CABLE E08903 089G1745CAA 9 DVI CABLE E08903 089G1745GAA 9 DVI CABLE E08903 089G1745HAA 9 DVI CABLE 1.
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U601 NR901 056G 616 85 AUDIO APA2603JI-TUG 3W DIP-16 061G RST NTCR 8 OHM +-20% 4A 13mm THINKING 5810T C908 063G107K474 6S 0.47UF +-10% C902 065G305M1023BW CAP Y2 1NF 20% 250V Y5U C903 065G305M1023BW CAP Y2 1NF 20% 250V Y5U C900 065G306M2222BP CAP Y1 2.2NF 20% 250V Y5P C907A 067G 40Z47015K EC 47UF 20% 450V 12.5*35 C907 067G 40Z47015K EC 47UF 20% 450V 12.5*35 C921 067G 4156814KV EC 680UF 20% 25V EP 12.
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0M1G 930 8120 HS3 090G6084 1 D906 093G 60507 0M1G 930 055G Q51G 8120 23524 6 4509 SCREW 3x8 GP HEAT SINK SCHOTTKY SRF1060 C0 10A 60V ITO-220AB SCREW 3x8 WELDING FLUX WITHOUT PB GLUE_RTV Q55G 100625 TIN STICK_LOW ARGENTUM U901 056G 379529 AC/DC CONVERTER IC LD7576AGR SOP-7 Q607 057G 417517 Tra LMBT3906LT1G -200mA/-40V SOT-23 LRC Q608 057G 417518 TRA LMBT3904LT1G 200mA/40V SOT-23 LRC R612 061G0603102 JT RST CHIP 1K 1/10W 5% TZAI YUAN R601 061G0603103 JT RST CHIP 10K 1/10W 5% TZAI
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R912 061G1206101 JT RST CHIPR 100 OHM +-5% 1/4W TZAI YUAN R929 061G1206101 JT RST CHIPR 100 OHM +-5% 1/4W TZAI YUAN R930 061G1206101 JT RST CHIPR 100 OHM +-5% 1/4W TZAI YUAN R911 061G1206103 JF RST CHIPR 10KOHM +-5% 1/4W FENGHUA R908 061G1206103 JT RST CHIPR 10KOHM +-5% 1/4W TZAI YUAN R913 061G1206109 JT RST CHIPR 1 OHM +-5% 1/4W TZAI YUAN R923 061G1206221 JT RST CHIPR 220 OHM +-5% 1/4W TZAI YUAN R902 061G1206624 JF RST CHIPR 620KOHM +-5% 1/4W FENGHUA R901 061G1206624 JF RST CHIPR
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709G4744 HS001 CONSUMPTIVE ASS'Y C807 067G 415479 9K EC 4.7UF 20% 100V ED 8*12 C809 067G315M1016KV EC 100UF 20% 35V 8*7 CN802 311GB254B04AAL PIN HEADER 2.54MM 4P 2P7.2MM/2P4.0MM CN801 311GB254B07AAL PIN HEADER 2.54MM 7P 5P7.2MM/2P4.
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R136 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R135 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R134 061G0402100 JT RST CHIP 10R 1/16W 5% TZAI YUAN R124 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R127 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R128 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R129 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R431 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R434 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R439 061G0
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R454 061G0402223 JT RST CHIP 22K 1/16W 5% TZAI YUAN R133 061G0402223 JT RST CHIP 22K 1/16W 5% TZAI YUAN R116 061G0402223 JT RST CHIP 22K 1/16W 5% TZAI YUAN R416 061G0402224 JT RST CHIP 220K 1/16W 5% TZAI YUAN R423 061G0402224 JT RST CHIP 220K 1/16W 5% TZAI YUAN R401 061G0402392 JT RST CHIP R 3K9 +/-5% 1/16W TZAI YUAN R404 061G0402392 JT RST CHIP R 3K9 +/-5% 1/16W TZAI YUAN R405 061G0402392 JT RST CHIP R 3K9 +/-5% 1/16W TZAI YUAN R419 061G0402394 JF RST CHIP R 390K +/-5% 1/16W R
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C115 065G040210412K Y CAP 0402 100NF 10% 16V X7R C117 065G040210412K Y CAP 0402 100NF 10% 16V X7R C118 065G040210412K Y CAP 0402 100NF 10% 16V X7R C119 065G040210412K Y CAP 0402 100NF 10% 16V X7R C402 065G040210412K Y CAP 0402 100NF 10% 16V X7R C403 065G040210412K Y CAP 0402 100NF 10% 16V X7R C405 065G040210412K Y CAP 0402 100NF 10% 16V X7R C408 065G040210412K Y CAP 0402 100NF 10% 16V X7R C409 065G040210412K Y CAP 0402 100NF 10% 16V X7R C410 065G040210412K Y CAP 0402 1
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ZD102 093G 39GA01 T RLZ5.
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J812 095G 90 23 JUMPER WIRE J901 095G 90 23 JUMPER WIRE J902 095G 90 23 JUMPER WIRE J903 095G 90 23 JUMPER WIRE J607 095G 90 23 JUMPER WIRE J608 095G 90 23 JUMPER WIRE J609 095G 90 23 JUMPER WIRE J610 095G 90 23 JUMPER WIRE J611 095G 90 23 JUMPER WIRE J612 095G 90 23 JUMPER WIRE J908 095G 90 23 JUMPER WIRE 709G4744 HA001 CONSUMPTIVE ASS'Y 715G4744P01000001C ADAPTER BOARD PCB U801 056G 700 IC LED driver MP3389EF TSSOP28 Q806 057G 763 92 FET P8008HV 4A/80V
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R812 061G1206308 JT C806 065G060310131J Y CAP CHIP 0603 100P 50V NP0 +/-5% C802 065G060368332K Y CHIP 0603 68NF 50V X7R C810 065G080510432K Y CAP CHIP 0805 100N 50V X7R +/-10% C805 065G080522141J Y CAP CHIP 0805 220P 100V NP0 +/-5% C801 065G080547432K A CAP CHIP 0805 0.47UF K 50V X7R C803 065G080547432K A CAP CHIP 0805 0.47UF K 50V X7R C804 065G080547432K A CAP CHIP 0805 0.