Table of Contents
Advertisement
Quick Links
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................................24
4.3.Panel Specification...........................................25
5.Block Diagram............................................................27
5.1.Main Board.....................................................27
5.2.Power Board..................................................28
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..........................................................29
6.1.Main Board.......................................................29
6.2.Power Board....................................................33
7.PCB Layout.........................................................35
7.1.Main Board......................................................35
7.2.Power Board.....................................................36
7.3.Key Board........................................................37
8.Maintainability.....................................................38
8.1.Equipments and Tools Requirement..................38
8.2.Trouble Shooting.............................................39
9.Firmware and DDC Instruction.......................43
10.White-Balance,Luminance Adjustment...............53
11.Monitor Exploded View......................................55
12.BOM List......................................................56
SAFETY NOTICE
1
AOC N2050S
Horizontal Frequency
30 - 83kHz
Page
Advertisement
Table of Contents
Related Manuals for AOC N2050S
Summary of Contents for AOC N2050S
-
Page 1: Table Of Contents
20" LCD Monitor AOC N2050S Service Service Service Horizontal Frequency 30 - 83kHz Table of Contents Description Page Description Page Table of Contents…………………..…………………..…...1 6.Schematic…………..….........29 Revision List.…...........……..2 6.1.Main Board..…….…...........29 Important Safety Notice.….…......……..3 6.2.Power Board..……….........33 1.Monitor Specification......………....4 7.PCB Layout..………..........35 2.LCD Monitor Description……….……………………..5 7.1.Main Board………..…........35... -
Page 2: Revision List
Revision List Version Release Date Revision History TPV Model Name TABMR9NCAGA1NNE Initial release TABMR9NEAGA1NNE Nov.-14-2011 TABMR9NDAGA1NNE... -
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) To protect equipment, always turn off the PC and LCD monitor before connecting. Connect the power cable to the AC port on the back of the monitor. 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.
-
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. Brightness 0-100 Backlight Adjustment Contrast 0-100 Contrast from Digital-register. Standard Standard Mode Text Text Mode Eco mode Internet Internet Mode Game Game Mode Movie Movie Mode Sports Sports Mode Gamma1 Adjust to Gamma1 Gamma Gamma2 Adjust to Gamma 2 Gamma3 Adjust to Gamma 3...
- 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. Clock 0-100 Adjust picture Clock to reduce Vertical-Line noise. Phase 0-100 Adjust Picture Phase to reduce Horizontal-Line noise Sharpness 0-100 Adjust picture sharpness H.Position 0-100 Adjust the horizontal position of the picture. V.Position 0-100 Adjust the vertical position of the picture.
- 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. Color setup. Warm Recall Warm Color Temperature from EEPROM. Normal Recall Normal Color Temperature from EEPROM. Cool Recall Cool Color Temperature from EEPROM. sRGB Recall SRGB Color Temperature from EEPROM. Red Gain from Digital-register User Green Green Gain Digital-register.
-
Page 15: Picture Boost
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. Frame Size 14-100 Adjust Frame Size Brightness 0-100 Adjust Frame Brightness Contrast 0-100 Adjust Frame Contrast H. position 0-100 Adjust Frame horizontal Position V.position 0-100 Adjust Frame vertical Position Bright Frame on or off Disable or Enable Bright Frame...
- 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. H.Position 0-100 Adjust the horizontal position of OSD V.Position 0-100 Adjust the vertical position of OSD Timeout 5-120 Adjust the OSD Timeout Transparence 0-100 Adjust the transparence of OSD Language Select the OSD language...
- 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. Input Select Analog Select Analog Sigal Source as Input Auto Config yes or no Auto adjust the picture to default Off timer 0-24hrs Select DC off time Image Ratio wide or 4:3 Select wide or 4:3 format for display DDC-CI yes or no Turn ON/OFF DDC-CI Support...
- 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: Led Indicators
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.
-
Page 24: Input/Output Specification
4. Input/Output Specification 4.1 Input Signal Connector Analog connector Pin Number 15-Pin Side of the Signal Cable Video-Red Video-Green Video-Blue N.C. Detect Cable GND-R GND-G GND-B Ground N.C. DDC-Serial data H-sync V-sync DDC-Serial clock 4.2 Preset Display Modes HORIZONTAL VERTICAL STAND RESOLUTION FREQUENCY(kHZ) -
Page 25: Panel Specification
4.3 Panel Specification 4.3.1 General Features M200O1-L02 is a 20.0” TFT Liquid Crystal Display module with 2 CCFL Backlight unit and 30 pins 2ch-LVDS interface. This module supports 1600 x 900 HD+ mode and can display up to 16.7M colors. The inverter module for Backlight is not built in. - Page 26 4.3.4 Optical Characteristics Ta= 25±2°C, Ha=50±10%RH, V =5.0V, I 8.0±0.5mA, F =55±5KHz...
-
Page 27: Block Diagram
04.Output 05.Power 03.Scalar T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size AOC 50 ID(1A) 715G4737-M0D-000-0040_110311 TPV MODEL 絬 隔 瓜 絪 腹 AOC 50 ID(1A) Key Component 01.Top PCB NAME 715G4737-M02 <称爹> 称 爹... -
Page 28: Power Board
5.2 Power Board AC input Transformer Rectifier Bridge EMI filter (T901) diodes Rectifier and Filter Start Resistor (R908,R911) Feedback PWM Control Circuit Power Switch LD7576AGR (Q901) (IC901) Photo coupler Regulator (U902) (IC903) Output Transformer MOSFET Circuit (PT801) (Q805, Q806) Lamp ON/OFF PWM Control Feedback... -
Page 29: Schematic
Q407 LMBT3904LT1G EDID_CTRL T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size AOC 50 ID(1A) 715G4737-M02-000-0040_110620 TPV MODEL 絬 隔 瓜 絪 腹 AOC 50 ID(1A) Key Component 02.Input PCB NAME 715G4737-M02 <称爹> 称 爹... - Page 30 NC/CONN C433 NC/CONN ZD401 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL AOC 50 ID(1A) Size NC/RLZ5.6B 絬 隔 瓜 絪 腹 715G4737-M02-000-0040_110620 TPV MODEL AOC 50 ID(1A) Key Component 03.Scalar PCB NAME 715G4737-M02 <称爹>...
- Page 31 120OHM C421 100UF 16V T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size AOC 50 ID(1A) AO3401A 715G4737-M02-000-0040_110620 TPV MODEL AOC 50 ID(1A) 絬 隔 瓜 絪 腹 Key Component 04.Output PCB NAME 715G4737-M02 <称爹>...
- Page 32 100 ohm R486 0 ohm T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size AOC 50 ID(1A) 715G4737-M02-000-0040_110620 TPV MODEL 絬 隔 瓜 絪 腹 AOC 50 ID(1A) Key Component 05.Power PCB NAME 715G4737-M02 <称爹>...
-
Page 33: Power Board
6.2 Power Board 715G4745P02000001C R929 100 OHM 1/4W BD901 C916 L905 KBP208G R930 100 OHM 1/4W 1N 630V Coil +16V R903 100 OHM 1/4W R915 R911 680OHM2W 680OHM2W ZD901 T ZX18B C918 D901 SR515 1000uF 25V Q904 KTD1028 R905 0.05R D902 SR515 R906 C907A... - Page 34 R817 +16V Q805 ZD802 ON/OFF RLZ5.6B ZD803 2.2 OHM 1/8W RLZ5.6B R816 2.2 OHM 1/8W R802 +5Vi CN801 R803 R804 PT801 CONN AO4620 5K1 +-5% 1/8W 5K1 +-5% 1/8W POWER X'FMR C819 68pF3KV 22OHM +-5% 1/8W C803 C815 0.1uF 50V 100N 50V Q806 C802...
-
Page 35: Pcb Layout
7. PCB Layout 7.1 Main Board 715G4737M02000004I... -
Page 36: Power Board
7.2 Power Board 715G4745P02000001C... -
Page 37: Key Board
7.3 Key Board 715G4747K02000001C... -
Page 38: 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 39: Trouble Shooting
8.2 Trouble Shooting 1. 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 40 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 41 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 42 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...
-
Page 43: Firmware And Ddc Instruction
9.Firmware and DDC Instruction 9.1Firmware Instruction(TSUM IC ISP for exemple Milo Qw1904e) Step 1:Tool list： 1. ISP board715GT034-B. 2. Printer cable and VGA cable 3. Adapter cable(12V) 4. Two three-core cables Reference picture as below： Step2: Software list： 1. LPT driver 2. - Page 44 double-click Realtek_ISP_Tool_V2.2 。 Step4: Program： 1. Run realtek_ISP_Tool_V2.2,interface as below: 2. Press down the Ctrl+Alt at the keyboard , in turn, choice Interface→CVT IIC;MCU Type→Serial Flash； Option→1TO1;ISP Type→Auto；ISP Address→0x94；File Type→Bin。 3. Click “Flash Protect” and interface show dialog box，in turn, choice Value→High；Series→LPA series；Pin...
- Page 45 List→Pin28；Click “OK”。 4. Click “BigBin”, show as follow picture, then choose correct software to click “open”, 5. Then, Click “Save Settings”, as below,...
- Page 46 6. Show the interface as follows after press the icon：...
- Page 47 7. It’s successfully if interface show PASS.
- Page 48 9.2 DDC Instruction（For exemple：Philips 201B） Tool list: 1. DDC board:715GT034-B 2. Software (WA.DAT&WD.DAT&*. CONFIG.INI) 3. LPT driver software 4. LPT cable, D-SUB CABLE 5. 12V( Adapter) 6. TPVDDCHDMI and TPVDDC6.0 7. PC 8. For example：MSTAR IC TSUMO58GDJ Tool picture For VGA BURNING: DDC Board as the follow picture: TO PC LPT DC 12V power Install software:...
- Page 49 2. Click “Load file” and select as follow picture.
- Page 50 3. Click “ok” show as follow picture. 4.Input same SN twice and date. Click “Pragram” to burn. When appear “pass” as follow picture that burning is successful.
- Page 51 5.Click “READ” show as follow picuture.If read SN is same as before inputing and model name is same as before that burning is successful. Appear fault as follow, please check the connection of LPT cable , Tool adapter cable and LCD power.
- Page 52 Note: If the burn software is unsuccessfulll, appear fault： 1. For VGA,the resolution will be not the best achieve. 2. For HDMI,No picture，no sound. If program failed, in VGA mode, you can’t use the optimal resolution. When Read is OK, program is NG, pls do take following action: 1.
-
Page 53: White-Balance,Luminance Adjustment
10.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 54 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±30，y=297±30 4.
-
Page 55: Monitor Exploded View
11. Monitor Exploded Views... -
Page 56: Bom List
H40G 001624 4A CARTON LABEL BARCODE 4 H40G 20N61538A N2050S PRC/AP ID LABEL H40G 45762413B P/N LABEL FOR BASE H41G780961534A AOC single page flyer for INDIA H44GA016101 H44GA016201 H44GA016615 3B N2050S CARTON H45G 87 1 23 EPE COVER H52G1801 16006... - Page 57 GND1 009G6005 1 GND TERMINAL CN803 033G8021 2E F CONNECTOR CN801 033G8021 2E F CONNECTOR IC902 056G 139 9 IC EL817M(X) photocoupler DIP-4 NR901 061G 58100 WD RST NTCR 10 OHM +-20% 5A THINKING C908 063G107K474 6S 0.47UF +-10% C817 065G 6J2096ET 2PF 5% SL 6KV C902...
- Page 58 R405 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R117 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R115 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R114 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN R111 061G0402101 JT RST CHIP 100R 1/16W 5% TZAI YUAN...
- Page 59 C416 065G040210412K CAP CHIP 0402 100nF K 16V X7R C415 065G040210412K CAP CHIP 0402 100nF K 16V X7R C414 065G040210412K CAP CHIP 0402 100nF K 16V X7R C413 065G040210412K CAP CHIP 0402 100nF K 16V X7R C407 065G040210412K CAP CHIP 0402 100nF K 16V X7R C406 065G040210412K CAP CHIP 0402 100nF K 16V X7R...
- Page 60 R813 061G0603104 JT RST CHIP 100K 1/10W 5% TZAI YUAN R809 061G0603105 JF RST CHIPR 1M OHM +-5% 1/10W FENGHUA R928 061G0603202 JF RST CHIPR 2K OHM +-5% 1/10W FENGHUA R920 061G0603202 JT RST 0603 2K 5% 1/10W R905 061G0603471 JT RST CHIPR 470OHM +-5% 1/10W TZAI YUAN R836 061G0603563 JT...
- Page 61 C915 065G080510332K CAP 0805 10NF K 50V X7R C912 065G080510432K CAP CHIP 0805 0.1UF K 50V X7R C815 065G080510432K CAP CHIP 0805 0.1UF K 50V X7R C811 065G080510432K CAP CHIP 0805 0.1UF K 50V X7R C809 065G080522131J CAP CHIP 0805 220PF J 50V NPO C818 065G080522512K CAP 0805 2.2UF 10% 16V X7R...
- Page 62 C819 095G 90 23 JUMPER WIRE C821 095G 90 23 JUMPER WIRE J817 095G 90 23 JUMPER WIRE J816 095G 90 23 JUMPER WIRE J810 095G 90 23 JUMPER WIRE J806 095G 90 23 JUMPER WIRE 709G4745 HA001 COMSUPTIVE ASS'Y E715 715G4745P02000001C POWER BOARD PCB...