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20" LCD Monitor
Service
Service
Service
Description
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............................................................28
5.1.Main Board....................................................28
5.2.Power Board..................................................29
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
R FOR TH
Table of Contents
Page Description
6.Schematic..........................................................30
6.1.Main Board.......................................................30
6.2.Power Board....................................................35
6.3.Key Board....................................................37
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
SAFETY NOTICE
1
AOC E2050S
DAN
Horizontal Frequency
30 - 83kHz
Page
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Summary of Contents for AOC E2050SDAN
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Page 1: Table Of Contents
20" LCD Monitor AOC E2050S Service Service Service Horizontal Frequency 30 - 83kHz Table of Contents Description Page Description Page Table of Contents…………………..…………………..…...1 6.Schematic…………..….........30 Revision List.…...........……..2 6.1.Main Board..…….…...........30 Important Safety Notice.….…......……..3 6.2.Power Board..……….........35 1.Monitor Specification......………....4 6.3.Key Board..……….........37 2.LCD Monitor Description……….……………………..5 7.PCB Layout..………..........38... -
Page 2: Revision List
Revision List Version Release Date Revision History TPV Model Name Initial release TACMN22QAGA15NE Sep.-13-2012... -
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... -
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 board 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 (See Figure ). By changing these settings, the picture can be adjusted to your personal preferences. * The power cord should be connected. - Page 7 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.
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Page 8: Osd Setting
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. - Page 9 Luminance Press (Menu) to display menu. Press to select (Luminance), and press to enter. Press to select submenu, and press to enter. Press to adjust.
- Page 10 Press two times to exit.
- Page 11 Image Setup Press (Menu) to display menu. Press to select (Image Setup), and press to enter. Press to select submenu, and press to enter. Press to adjust.
- Page 12 Press two times to exit.
- Page 13 Color Setup Press (Menu) to display menu. Press to select (Color Setup), and press to enter. Press to select submenu, and press to enter. Press to adjust.
- Page 14 Press two times to exit.
- Page 15 Picture Boost Press (Menu) to display menu. Press to select (Picture Boost), and press to enter. Press to select submenu, and press to enter. Press to adjust.
- Page 16 Press two times to exit.
- Page 17 OSD Setup Press (Menu) to display menu. Press to select (OSD Setup), and press to enter. Press to select submenu, and press to enter. Press to adjust.
- Page 18 Press two times to exit.
- Page 19 Extra Press (Menu) to display menu. Press to select (Extra), and press to enter. Press to select submenu, and press to enter. Press to adjust.
- Page 20 Press two times to exit.
- Page 21 Exit Press (Menu) to display menu. Press to select (Exit), and press to enter. Press two times to exit Exit Exit the main OSD...
- Page 22 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);...
- Page 23 Screen+ Welcome to "Screen+" software by AOC, Screen+ software is a desktop screen splitting tool, it splits the desktop into different panes, each pane displays a different window. You only need to drag the window to a corresponding pane, when you want to access it.
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Page 24: Input/Output Specification
4. Input/Output Specification 4.1 Input Signal Connector Analog connector... -
Page 25: Preset Display Modes
4.2 Preset Display Modes... -
Page 26: Panel Specification
4.3 Panel Specification 4.3.1 General Features M200FGE-L23 is a 20.0” TFT Liquid Crystal Display module with WLED Backlight unit and 30 pins 2ch-LVDS interface. This module supports 1600(H) x 900(V),HD+ resolution and can display up to 16.7M colors. The converter module for Backlight is not built in. - Page 27 BACKLIGHT UNIT Ta = 25 ± 2 º C 4.3.4 Optical Characteristics Ta = 25 ± 2° C...
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Page 28: Block Diagram
5. Block Diagram 5.1 Main Board 04.SCALER 02.INPUT VCC3.3 VCC3.3 SOG_DET VCC1.8 SOG_DET SOG_DET VCC1.8 05.PANEL INTERFACE EDID_WP AHS0 EDID_WP AHS0 AHS0 AVS0 AVS0 AVS0 PA[0..9] DDCSDA1 DDCSDA1 DDCSDA1 PA[0..9] PA[0..9] DDCSCL1 DDCSCL1 DDCSCL1 VGA_CABLE_DET VGA_CABLE_DET VGA_CABLE_DET PB[0..9] 02.D-SUB INPUT PB[0..9] PB[0..9] EDID_WP... -
Page 29: Power Board
5.2 Power Board AC input Transformer Rectifier Bridge 14.5V EMI filter (T901) diodes Rectifier and Filter Start Resistor (R908,R911) Feedback PWM Control Circuit Power Switch LD7576AGR (U901) (Q901) Photo coupler Regulator (U902) (IC903) L801 D801 14.5V C809 MOSFET (CN804) (Q801) PWM Control ON/OFF OZ9998BGN... -
Page 30: Schematic
6. Schematic 6.1 Main Board 715G4502M01BRA004C CN101 DET_VGA R102 100R 1/16W 5% VGA_CABLE_DET VGA_CABLE_DET 5 D-SUB 15P VGA_5V DDCSCL1 R101 DDCSCL_A DDCSCL1 VGA_5V 100R 1/16W 5% VSIN0 BIN0- HSIN0 BIN0 R103 R104 R105 C102 GIN0- BIN0 ZD101 0R05 1/16W 0R05 1/16W 100R 1/16W 5% 47N16V B0+ 5... - Page 31 CN102 R127 DVI_CABLE_DET 5 JACK 100R 1/16W 5% DVI5V 3,5,7 VSY NC DET_DVI DVI5V SY NC GND SCL_DVI R128 100R 1/16W 5% D102 DDC SCL SDA_DVI R129 100R 1/16W 5% ESD_DVI BAV70 DDC SDA DVI5V R130 1K 1/16W 5% U104 ESD_DVI Q101 ESD_DVI...
- Page 32 VCC1.8 U401 NT68660FG FB401 and FB402 is VCC1.8 7 PB[0..9] R402 NC/2K2 1/16W 5% NC==>3.3V use TO252 type PB[0..9] FB401 LVB3P R403 NC/2K2 1/16W 5% CVDD LVB3M 300OHM U401 NT68660UFG FB402 is NC==>3.3V LVBCKP LVBCKM VCC3.3 and 1.8V LDO use SOT-223 type LVB2P C401 C402...
- Page 33 PA[0..9] PB[0..9] PA[0..9] PB[0..9] LVB3P CN408 LVA3P LVB3M CONN LVA3M LVBCKP LVB0M RXO0- LVACKP LVBCKM LVB0P RXO0+ LVACKM LVB2P LVB1M RXO1- LVA2P LVB2M LVB1P RXO1+ LVA2M LVB1P LVB2M RXO2- LVA1P LVB1M LVB2P RXO2+ LVA1M LVB0P LVA0P LVB0M LVBCKM RXOC- LVA0M LVBCKP RXOC+ LVB3M...
- Page 34 VCC3.3 CN702 U701 AZ1117H-3.3TRG1 FB701 0 OHM +-5% 1/8W 3,4,5 VCC3.3 5 INPUT OUTPUT VCC3.3 ADJ/GND ON/OFF NC/CONN C701 R702 4K7 1/16W 5% 100N 16V +5V 3,4,5 CN701 R703 100R 1/16W 5% Adj_BACKLIGHT 5 C706 U702 VCC3.3 100N 16V C705 NC/G1117-33T43UF 100uF16V ON/OFF...
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Page 35: Power Board
6.2 Power Board 715G4744P02000001M R929 100 OHM 1/4W BD901 C916 C928 F801 KBP308G R930 100 OHM 1/4W 2N2 500V 2N2 500V 0R05 1/4W +14.5V R903 100 OHM 1/4W R904 ZD901 250OHM2W MTZJ T-72 16B 80GL22T-3 C918 680UF 25V T901 D901 POWER X'FMR SR515 R905... - Page 36 FB802 D801 L801 +14.5V C801 47UH BEAD Q801 330uF 25V R804 C814 SK310B 100N 50V 10 OHM 1/8W APM8005KCTRG R801 C810 10K 1/8W 0.47UF 50V ON/OFF R814 R815 10 OHM 1% 1/4W R802 C809 150K 1/8W R805 300K 1/8W C811 C802 33UF 100V 0.47UF 50V...
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Page 37: Key Board
6.3 Key Board 715G4747K02000001C LED001 CN001 LBADC1 R001 2KOHM 1% 1/10W LBADC2 DC_POWERON R002 0R01 1/10W LED_1# LED_2# C001 C002 R003 2KOHM 1% 1/10W R004 1K 1/10W NC/0.1uF 50V NC/0.1uF 50V Wire Harness SGND SW005 SW004 SW003 SW002 SW001 AUTO(2.0K) 1.118V LBADC1 DOWN... -
Page 38: Pcb Layout
7. PCB Layout 7.1 Main Board 715G4502M01BRA004C... -
Page 40: Power Board
7.2 Power Board 715G4744P02000001M... -
Page 42: Key Board
7.3 Key Board 715G4747K02000001C... -
Page 43: 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 44: Trouble Shooting
8.2 Trouble Shooting No Power No power Check power cable is Re-plug the power cable tightened? 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 converter board Replace main board and check connections Replace key board and check connections... - Page 45 2. No Video (Power LED Blue) No Video (Power LED Blue) Press the power Replace the main board button is OK? Replace the converter The end board Replace the main The end board and connection Replace the LVDS/FFC Check the LVDS/FFC cable or panel cable or panel Replace the key board...
- Page 46 3. DIM DIM (image overlap, focus or flicker) Reset in factory mode The end 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 47 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 48: 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 49 C. Adjust Cool (9300K) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x=283±20，y=297±20 4.
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Page 50: Monitor Exploded View
10. Monitor Exploded Views... -
Page 51: Bom List
SP ID LABEL H45G 77 6 PE PACKING H45G 87 18 24 EPE COVER H45G 87 28 V2 PE BAG FOR MANUAL H52G1801 16006 insulating sheet H70G20C161507A CD MANUAL E2050SDAN KEPCAHB5 KEY BOARD PLPCBA341MHE1 POWER BOARD Q02G7033 1 NUT M3... - Page 52 Q34G7391AEDT1B01KA BEZEL Q41G780A61566A WARRANTY CARD Q52G 1185 99 BIG CARTON TAPE FOR AOC 72MM 040G 58162461A EPA LABEL 0Q1G 140 12120 SCREW 4X12 A33G1183ABJ 1L0100 STAND_TOP A37G0241013 HINGE 20 AM1G1740 10125 SCREW 705GHC34A06 REAR COVER ASS’Y-C A15G1587101 BKT_HINGE Q34G7392ABJ0MK01KA REAR_COVER...
- Page 53 CN601 088G302J5G1VCL PHONE JACK V/T 5P GREEN H=15 BD901 093G 50460515 BRIDGE KBP308G-C 3A 800V KBP D901 093G 60335 DIODE SR515 5A/150V DO-201AD D909 093G 60519 DIODE SR560-MK23 5A/60V DO-27 SECOS D905 093G 60519 DIODE SR560-MK23 5A/60V DO-27 SECOS CN902 095G 825 9D905 HARNESS 9P(SCN) - 9P 80mm FQE100911I CN804...
- Page 54 R801 061G0805103 JF RST CHIPR 10K OHM +-5% 1/8W FENGHUA R818 061G0805103 JF RST CHIPR 10K OHM +-5% 1/8W FENGHUA R918 061G0805103 JF RST CHIPR 10K OHM +-5% 1/8W FENGHUA R928 061G0805103 JF RST CHIPR 10K OHM +-5% 1/8W FENGHUA R805 061G0805104 JT RST CHIPR 100KOHM +- 5% 1/8W TZAI YUAN...
- Page 55 R817 061G1206681 JT RST CHIPR 680 OHM +-5% 1/4W TZAI YUAN C614 065G060310412K CAP CHIP 0603 100N 16V X7R +/-10% C612 065G060310412K CAP CHIP 0603 100N 16V X7R +/-10% C605 065G060310412K CAP CHIP 0603 100N 16V X7R +/-10% C609 065G060310512K CAP 0603 1UF 10% 16V X7R C608 065G060310512K...
- Page 56 FB602 071G 56K121 M CHIP BEAD 120OHM 6A MGLB2012-120T-LF D801 093G 60S907 T SCHOTTKY B3100B 3A 100V SMB 709G4744 HS001 CONSUMPTIVE ASS'Y U401 056G 562368 SCALER NT68660FG/B TQFP-100 U701 056G 563515 LDO AZ1117D-3.3TR/E1 1A/3.3V TO-252 U104 056G 662 52 ESD PROTECT AZC398-04S.R7G SOT23-6 U107 056G 662 52 ESD PROTECT AZC398-04S.R7G SOT23-6...
- Page 57 R113 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R798 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R712 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R703 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R439 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN...
- Page 58 R142 061G0402471 JT RST CHIP 470R 1/16W 5% TZAI YUAN R114 061G0402472 JT RST CHIP 4K7 1/16W 5% TZAI YUAN R115 061G0402472 JT RST CHIP 4K7 1/16W 5% TZAI YUAN R131 061G0402472 JT RST CHIP 4K7 1/16W 5% TZAI YUAN R132 061G0402472 JT RST CHIP 4K7 1/16W 5% TZAI YUAN...
- Page 59 C113 065G040210412K CAP 0402 100NF 10% 16V X7R C414 065G0402105A5K NO-SUGGEST CAP 0402 1UF 10% 10V X5R C428 065G040222031J CAP CHIP 0402 22P 50V NP0 +/-5% C426 065G040222031J CAP CHIP 0402 22P 50V NP0 +/-5% C182 065G040222031J CAP CHIP 0402 22P 50V NP0 +/-5% C181 065G040222031J CAP CHIP 0402 22P 50V NP0 +/-5%...
- Page 60 R915 061G 17222052T TZ RST CFR 22R 5% 1/4W R906 061G152M10452T SY RST MOFR 100KOHM +-5% 2WS FUTABA R904 061G152M25152T SY RST MOF 250R 5% 2W R924 061G152M47852T SY RST MOFR 0.47 OHM +-5% 2WS FUTABA C911 065G 2K152 2T6921 CAP CER 1500pF K 2KV Y5P C805 065G250K1052HT...
- Page 61 J608 095G 90 23 JUMP WIRE - - J607 095G 90 23 JUMP WIRE - - J603 095G 90 23 JUMP WIRE - - J604 095G 90 23 JUMP WIRE - - J606 095G 90 23 JUMP WIRE - - J814 095G 90 23 JUMP WIRE - -...