Service manual

ManualsBrandsAOC ManualsComputer equipmente2250Swn

21.5" LCD Monitor AOC e2250Swn

Service

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.

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 pecification...............…..…………….......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

6.Schematic…………..….........................................30

6.1.Main Board..…….…...........................................30

6.2.Power Board..……….........................................34

7.PCB Layout..………..............................................36

7.1.Main Board………..…........................................36

7.2.Power Board….…..............................................38

7.3.Key Board………..…..........................................39

8.Maintainability………............................................40

8.1.Equipments and Tools Requirement…...............40

8.2.Trouble Shooting…..………...............................41

9.White-Balance,Luminance Adjustment…............45

10.Monitor Exploded View……................................47

11.BOM List…………..……………………….............48

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

R FOR TH

UNIT WHEN S

Summary of content (55 pages)

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21.5" LCD Monitor AOC e2250Swn 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 1.Monitor Specification...........................
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Revision List Version Release Date Revision History A00 Dec.-28-2011 Initial release TPV Model Name TIBMRV2BDFA2NNE TIBKRV2BDFA1NNE TIA4RV2YAGACNNE TIB1RV2QAGA1NNE TIB2RV2BAGA1NNE TIB2RV2BDFA1NNE TIB2RV2YAGA1NNE TIBKRV2BAGA7NNE A01 Feb.
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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, 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. 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) 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 Turn on your monitor and computer. If your monitor displays an image, installation is complete. If it does not display an image, please refer Troubleshooting.
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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. 4 Press 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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5 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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5 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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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. It supports multiple monitor display to make your task easier. Please follow the installation software to install it.
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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 M215HGE-L23 is a 21.5” TFT Liquid Crystal Display module with WLED Backlight unit and 30 pins 2ch-LVDS interface. This module supports 1920 x 1080 Full HD mode and can display up to 16.7M colors. The converter module for Backlight is not built in. 4.3.2 General Specifitions 4.3.3 Electrical Characteristics Electrical characteristics Vcc = 5.
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original value. 4.3.
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5. Block Diagram 5.1 Main Board XGA/SXGA CMVCC1 LVDS OUTPUT DSUB_R+ DSUB_RDSUB_G+ DSUB_GDSUB_SOG DSUB_B+ DSUB_BDSUB_H DSUB_V DDC1_SDA DDC1_SCL DET_CABLE DSUB_R+ DSUB_RDSUB_G+ DSUB_GDSUB_SOG DSUB_B+ DSUB_BDSUB_H DSUB_V DDC1_SDA DDC1_SCL DET_CABLE EDID_CTRL EDID_CTRL VCC1.2 VCC3.3 VCC1.2 VCC3.3 CMVCC1 CMVCC1 CMVCC1 02.Input 04.Output VCC1.2 VCC3.3 PA[0..1] VCC1.2 on_BACKLIGHT CMVCC on_BACKLIGHT VCC3.3 CMVCC1 Mute Volume# PANEL_ID# Adj_BACKLIGHT PA[0..1] PA[4..9] PA[4..9] PA[4..
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5.2 Power Board AC input 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 (U902) 14.
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6. Schematic 6.1 Main Board 715G4737M02000004I FB102 R104 H_Sy nc V_Sy nc R101 0R05 1/10W R102 100R 1/16W 5% R103 100R 1/16W 5% DSUB_H DSUB_V VGA_B+ 5 5 1 100R 1/16W 5% C104 R107 R105 2K2 1/16W 5% C101 2 BEAD R106 C102 C103 2K2 1/16W 5% 22PF 50V 22PF 50V 75 OHM +-5% 1/16W 5PF 50V R108 5 10 4 9 3 8 2 7 1 6 14 ミΑCONN 13 DSUB_SDA 12 C106 22NF25V R111 1 5 DSUB_G- 5 DSUB_R+ 5 DSUB_R- 5 C107 2 BEAD RLZ5.
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VCC3.3 C436 100N16V VCC1.2 AVDD R+ RG+ GSOG0 B+ BHSY NC0 VSY NC0 DDCA_SDA/RS232_TX DDCA_SCL/rs232_RX 30 53 DVDD12 DVDD12 13 12 10 9 11 8 7 16 17 18 19 DSUB_R+ DSUB_RDSUB_G+ DSUB_GDSUB_SOG DSUB_B+ DSUB_BDSUB_H DSUB_V DDC1_SDA DDC1_SCL ADC_VDD33 3 3 3 3 3 3 3 3 3 3 3 PVDD33 6 51 VCC3.3 7 LDO_CTL TXE3+ TXE3- 52 33 34 VCTRL 35 36 37 38 39 40 PA4 PA5 PA6 PA7 PA8 PA9 If product spec is <0.3W, need to VCC3.3 check flash VCC current. 4 R403 390R 1/16W 1% AVDD 15 VCC3.
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5 PANEL_VCC PA[0..1] PA[0..1] PA0 PA1 5 CN405 for 18.5" panel (single LVDS channel) PA[4..9] PA[4..
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CMVCC 5 CMVCC1 VCC3.3 VCC3.3 VCC3.3 CMVCC CN404 R465 R437 R439 NC 10K 1/16W 5% 10K 1/16W 5% R480 NC/1.5 OHM +-5% 2WS VCC1.2 R479 0R05 1/4W BKLT-EN VCC1.2 CMVCC1 CMVCC1 R450 NC NC(R0402) 5 Q410 MMBT2907A C425 R449 NC PANEL_ID# 5 Q406 LMBT3904LT1G on_BACKLIGHT NC 100N16V 5 5 VCTRL 5 CONN U406 3 VCC3.3 VCC3.3 CMVCC1 R446 R441 10K 1/16W 5% NC MVCC FB403 adj_BACKLIGHT ADJ(GND) NC VCC3.
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6.2 Power Board 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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FB802 D801 L801 1 2 1 2 CN803 +14.5V 10 OHM 1/8W 47UH BEAD 8 7 6 5 C801 330uF 25V Q801 C814 100N 50V APM8005KCTRG 1 2 C810 0.
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7. PCB Layout 7.
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7.
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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.tpvaoc.cn/hello1.asp for the latest information. TIBMRV2BDFA2NNE Location Part No.
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H45G EPE COVER insulating sheet H70G21C1615 6A e2250Swn CD MANUAL KEPCAHB5 KEY BOARD PLPCBB381MHD1 POWER BOARD Q40G 58162435A LABEL Q52G SMTCB-U402 1 25 H52G1801 16006 Q45G E08907 87 76 28 H A 1185 99 P.E. BAGx320x210x0.04 BIG CARTON TAPE FOR AOC Q52G1001207 A JY AL FOIL Q52G1001211 B JY AL FOIL Q52G6019 14 TAPE S95G179T30NE34 FFC CABLE 30P 190mm P1.
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BD901 H40G 45762429A LABEL 093G BRIDGE KBP308G-C 3A 800V KBP 50460515 Q55G 100625 TIN STICK_LOW ARGENTUM C423 067G305M1013PB EC 100uF M 16V 6.3*7mm JH CD70H C421 067G305M1013PB EC 100uF M 16V 6.3*7mm JH CD70H C427 067G305M1013PB EC 100uF M 16V 6.3*7mm JH CD70H C426 067G305M1013PB EC 100uF M 16V 6.3*7mm JH CD70H U401 056G 562432 SCALER RTD2280LW-CG LQFP-64 U406 056G 563149 IC G903T63UF 0.6A/3.3V SOT-223 U102 056G 662 48 ESD PROTECT AZC399-04S.
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R435 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R433 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R414 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R410 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R408 061G0402103 JT RST CHIP 10K 1/16W 5% TZAI YUAN R118 061G0402104 JT RST CHIP 100K 1/16W 5% TZAI YUAN R436 061G0402104 JT RST CHIP 100K 1/16W 5% TZAI YUAN R492 061G0402220 JT RST CHIP 22R 1/16W 5% TZAI YUAN R491 061G0402220 JT RST CHIP 22R 1/16W 5% TZAI YUAN R490 061G04022
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C407 065G040210412K A CAP CHIP 0402 100nF K 16V X7R C406 065G040210412K A CAP CHIP 0402 100nF K 16V X7R C403 065G040210412K A CAP CHIP 0402 100nF K 16V X7R C401 065G040210412K A CAP CHIP 0402 100nF K 16V X7R C404 065G0402105A5K A CAP CHIP 0402 1UF K 10V X5R C411 065G040220031J Y CAP 0402 20PF 5% 50V NP0 C412 065G040220031J Y CAP 0402 20PF 5% 50V NP0 C103 065G040222031J A CAP 0402 22PF J 50V NPO C102 065G040222031J A CAP 0402 22PF J 50V NPO C106 065G040222322K T CAP MLC
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U901 056G 379529 AC/DC CONVERTER IC LD7576AGR SOP-7 U801 056G 700 11 LED DRIVER OZ9998BGN-A1-0-TR SOP-16 Q801 057G 763 92 FET P8008HV 4A/80V SOP-8 RJ801 061G0805000 JF RST CHIPR 0 OHM +-5% R804 061G0805100 JF RST CHIPR 10 OHM +-5% 1/8W FENGHUA R916 061G08051002FT RST CHIP 10K 1/8W 1% R806 061G0805102 JF RST CHIPR 1K OHM +-5% 1/8W FENGHUA R907 061G0805102 JT RST CHIPR 1K OHM +- 5% 1/8W R801 061G0805103 JF RST CHIPR 10K OHM +-5% 1/8W FENGHUA R818 061G0805103 JF RST CHIPR 10K OHM +
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C813 065G080510131J F CAP CHIP 0805 100PF J 50V NPO C812 065G080510131J F CAP CHIP 0805 100PF J 50V NPO C923 065G080510232K F CAP 0805 1000PF 10% 50V X7R C803 065G080510232K Y CAP CHIP 0805 1N 50V X7R +/-10% C914 065G080510232K Y CAP CHIP 0805 1N 50V X7R +/-10% C906 065G080510232K Y CAP CHIP 0805 1N 50V X7R +/-10% C815 065G080510232K Y CAP CHIP 0805 1N 50V X7R +/-10% C802 065G080510332K Y CAP CHIP 0805 10N 50V X7R +/-10% C915 065G080510332K Y CAP CHIP 0805 10N 50V X7R +/-1
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Q904 057G 530503 J801 095G 90 23 JUMPER WIRE J802 095G 90 23 JUMPER WIRE J803 095G 90 23 JUMPER WIRE J804 095G 90 23 JUMPER WIRE J805 095G 90 23 JUMPER WIRE J806 095G 90 23 JUMPER WIRE J807 095G 90 23 JUMPER WIRE J808 095G 90 23 JUMPER WIRE J809 095G 90 23 JUMPER WIRE J810 095G 90 23 JUMPER WIRE J811 095G 90 23 JUMPER WIRE J812 095G 90 23 JUMPER WIRE J813 095G 90 23 JUMPER WIRE J814 095G 90 23 JUMPER WIRE J815 095G 90 23 JUMPER WIRE J901 095G 9