20"LCD Monitor AOC 2036Va 1 Service Service Service Horizontal Frequency 30-80kHz 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 Connectors................................6 3.3.OSD Menu….............................................................7 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.Software Flow Chart..…...........................................16 5.2.Electrical Block Diagram..…………….…….............18 6.Schematic……………................................................20 6.1.Main Board………...................................................20 6.2.Power Board.......….…............................................24 6.3.Key Board…...………..............................................27 6.4.USB Board…….……..............................................28 7.PCB Layout...…………..............................................30 7.1.Main Board…………...............................................30 7.2.Power Board……....................................................33 7.3.Key Board……….……............................................35 8.Maintainability .....……................................................36 8.1.Equipments and Tools Requirement…...................36 8.2.Trouble Shooting…………......................................36 9.White-Balance,Luminance Adjustment…..................42 10.Monitor Exploded View….........................................44 11.BOM List……….………….…………………..............45 CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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20"LCD Monitor AOC 2036Va
1
Service Service Service
Horizontal Frequency
30-80kHz 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
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.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected. Hereafter throughout this manual, AOC Company will be referred to as AOC. WARNING Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock, fire, or other hazards. Under no circumstances should the original design be modified or altered without written permission from AOC. AOC assumes no liability, express or implied, arising out of any unauthorized modification of design. Servicer assumes all liability. FOR PRODUCTS CONTAINING LASER: DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM. CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. CAUTION -The use of optical instruments with this product will increase eye hazard. TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE MANUAL. Take care during handling the LCD module with backlight unit -Must mount the module using mounting holes arranged in four corners. -Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen. -Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel. -Protect the module from the ESD as it may damage the electronic circuit (C-MOS). -Make certain that treatment person’s body is grounded through wristband. -Do not leave the module in high temperature and in areas of high humidity for a long time. -Avoid contact with water as it may a short circuit within the module. -If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)
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1. Monitor Specifications Model number 2036Va
Driving system TFT Color LCD
Viewable Image Size 508.05mm diagonal
Pixel pitch 0.2768mm(H) x 0.2768mm(V)
Video R, G, B Analog lnterface & Digital Interface
Separate Sync. H/V TTL
Display Color 16.7M Colors
LCD Panel
Dot Clock 165MHz
Horizontal scan range 30 kHz - 80 kHz
Horizontal scanSize(Maximum) 442.8mm
Vertical scan range 55 Hz - 75 Hz
Vertical scan Size(Maximum) 249.075mm
Optimal preset resolution 1600 x 900 (60 Hz)
Highest preset resolution 1600 x 900 (60 Hz) )
Plug & Play VESA DDC2B/CI
Input Connector D-Sub 15pin,DVI-D
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM,TMDS
Power Source 100-240VAC, 50/60Hz
Typical < 32W Power Consumption
Standby < 1 W
Speakers 2 x 1W
Resolution
USB Downstream port (A type) To USB device,loading<100mA
Connector Type 15-pin Mini D-Sub,DVI-D
Signal Cable Type Detachable
Height (with base) 378.66mm
Width 496.54mm
Depth 186mm
Weight (monitor only) 4.2kg
Physical Characteristics
Dimensions & Weight:
Weight (with packaging) 6.1kg
Operating 0° to 40° Temperature:
Non-Operating -20°to 60°
Operating 10% to 85%(non-condensing) Humidity:
Non-Operating 5% to 80% (non-condensing)
Operating 0~ 3000m (0~ 10000 ft )
Environmental
Altitude: Non-Operating 0~ 5000m (0~ 15000 ft )
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2. LCD Monitor Description The LCD monitor will contain a main board, a power board, a key board and two USB 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.
AC-IN 100V-240V
Power board
(Include adapter, inverter, audio)
Flat Panel and CCFL backlight
Main Board RS232 Connector For white balance adjustment in factory mode
CCFL Drive.
Video signal, DDCHOST Computer
Key Board
Monitor Block Diagram
USB Board
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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 buttons are located on the side of the monitor. By changing these settings, the picture can be adjusted to your personal perference. • The power cord should be connected. • Connect the video cable from the monitor to the video card. • Press the power button to turn on the monitor position. The power indicator will light up.
3.2 Control Buttons and Connections 3.2.1 Control Buttons
Power: Press to turn on or turn off the monitor. Auto or 16:9 / Up /Source Press key to change the screen aspect ratio between standard Auto format or 16:9 format.When the input resolution is wide format, the aspect ratio hotkey is disabled. When the main menu or sub-menu is active, the key functions as to select up or increase value. Auto/Down/Volume: Auto configure hot key: When the OSD is closed, press Auto button to do auto configure. 3.2.2 Connections Cable Connections on Back of Monitor and Computer
1. Power 2. Analog (D-SUB-15 VGA cable) 3. Audio 4. DVI 5. USB
5
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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. 4.Turn on your monitor and computer. 3.3 OSD Menu
Eco mode ---DCR, Standard, Text, Internet, Game, Movie, Sports Notes: When Eco mode is not set as “Standard”, Contrast and Brightness can not be adjusted; When DCR is set as “On”, Contrast, Brightness, Eco mode and Gamma can not be adjusted.
Color Boost --- Full Enhance, Nature Skin, Sky-Blue, Green Field, Auto Detect, Demo, Off, Exit Notes: Full Enhance: Total color saturation is enhanced, suitable for vivid pictures. Natural Skin: Suitable for human portrait. Green Field: Suitable for large area of green. Sky Blue: Suitable for sky or ocean scene. Auto Detect: Suitable for outdoor or garden. Demo: Screen divided into two for comparison purpose.
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Luminance ---Brightness, Contrast, Gamma Notes: When Eco mode is not set as “Standard”, Contrast and Brightness can not be adjusted; When DCR is set as “On”, Contrast, Brightness, Eco mode and Gamma can not be adjusted.
Extra---Language, Reset, DDC-CI, OSD Timeout, Transparency, V. Position, H. Position, Off Timer*,Exit *There is Off Timer function for this model, you can set it to turn off automatically.
Exit
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OSD Control Function Main Menu
Icon 1nd Menu Icon 1nd Sub Menu
Item Description Adjust Range Reset Value
DCR Dynamic contrast ratio N/A Recall OFF
Value Standard Text Internet Game Movie
Eco Mode Picture Adjustment
Sports
Recall Standard Value
Full Enhance RGB and brightness enhance N/A Recall OFF Value
Nature Skin Red enhance N/A Recall OFF Value
Sky- blue Blue enhance N/A Recall OFF Value
Green Field Green enhance N/A Recall OFF Value
Auto Detect RGB enhance N/A Recall OFF Value
Demo Enhance area in half picture ON/OFF Recall OFF Value
OFF Disable color boost N/A Recall OFF Value
Brightness Backlight adjustment each step will increase/decrease value by 1
00-100 Recall Warm Brightness Value 90
Contrast Contrast from digital-register. each step will increase/decrease value by 1
00-100 Recall Warm Contrast Value 50
Gamma1 Gamma2 Gamma Gamma adjustment Gamma3
Recall Gamm1
Clock
Adjust picture phase to reduce Vertical-Line noise each step will increase/decrease value by 1
00-100 Do Auto Config
Phase
Adjust picture clock to reduce Horizontal-Line noise. each step will increase/decrease value by 1 or 2
00-100 Do Auto Config
H. Position
Adjust the horizontal position of the picture. each step will increase/decrease value by 1 or 2
00-100 Do Auto Config
V. Position
Adjust the vertical position of the picture. each step will increase/decrease value by 1 or 2
00-100 Do Auto Config
User / R Red gain from digital-register. each step will increase/decrease value by 1
00-100
User / G Green gain from digital-register. each step will increase/decrease value by 1
00-100
User / B Blue gain from digital-register. each step will increase/decrease value by 1
00-100
Normal (7300K)
Recall Normal color temperature from EEPROM. N/A
The Color Temperature will be set to Warm. The User R/G/B value
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Warm (6500K)
Recall Warm color temperature from EEPROM. N/A
Cool (9300K)
Recall Cool color temperature from EEPROM. N/A
sRGB
Recall sRGB color temperature from EEPROM. N/A
(default is 50) will not be Modified by Reset function in user mode.
V. Position Adjust the vertical position of the Frame 00-100 Recall 0 Value
H. Position Adjust the horizontal position of the Frame 00-100 Recall 0 Value
Contrast Contrast Adjustment for Enhance Area 00-100 Recall 50
Value
Brightness Brightness Adjustment for Enhance Area 00-100 Recall 50
Value
Frame Size Adjust the Size of the Frame 14-100 Recall 14 Value
Bright Frame Enable/Disable Bright Frame ON/OFF Recall OFF
Value English Français Español Português Deutsch Italiano Nederlands Svenska Suomi Polski Čeština Pycckий Korean 繁體中文
Language
Set OSD display language to English.(English is default setting)
简体中文
No need to recall language while press “RESET”. If customer have different request, please refer to customer request
Clear each old status of Auto-configuration and set the color temperature to Warm
YES Reset
Do not execute reset, return to main menu. NO
NA
Support DDC/CI Function YES DDC CI Unsupported DDC/CI Function NO
Yes
Timeout Adjust the OSD timeout. each step will increase/decrease value by 5
05-120 Recall 10 Value
Transparence
Adjust the OSD transparent each step will increase/decrease value by 25
00-100 Recall 0 Value
V. Position
Adjust the vertical position of the OSD. each step will increase/decrease value by 5
00-100 Recall 0 Value
H. Position
Adjust the horizontal position of the OSD. each step will increase/decrease value by 5
00-100 Recall 100 Value
OFF time Adjust the DC off time each step will increase/decrease value by 1 ( unit: Hour )
00-24 Recall 0 Value
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Exit Exit the main OSD N/A N/A
Main Menu
Item Main Menu Icon 1st Sub Menu Item
Description Adjust Range Reset Value
Menu
Menu
Turn on main menu / enter N/A
AUTO
Image ratio
Select image ratio from auto, 16:9 ( can’t change when input is wide timing ) 16:9
Select auto or wide format for display
AUTO D-SUB
▲
Input Select
Select input signal from auto, analog and digital DVI-D
▼
Volume、Auto
Config
Adjust the volume/Auto Adjust the Clock, Focus and H/V Position of picture
N/A
Power power
Turn on/off power N/A
menu+ DC power on Key lock /
unlock Enable / disable key function N/A
▲+▼ DC power
on Factory
mode Into factory mode for auto color adjustment N/A
Status LED Color
Full Power Mode Blue
Active-off Mode Orange
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4. Input/Output Specification 4.1 Input Signal Connector Analog connectors
Pin No. Description Pin No. Description
1 Video-Red 9 +5V
2 Video-Green 10 Ground
3 Video-Blue 11 N.C.
4 N.C. 12 DDC-Serial Data
5 Detect Cable 13 H-Sync
6 GND-R 14 V-Sync
7 GND-G 15 DDC-Serial Clock
8 GND-B
Digital connectors
Pin No. Description Pin No. Description
1 TMDS data 2- 13 TMDS data 3+
2 TMDS data 2+ 14 +5V Power
3 TMDS data 2/4 Shield 15 GND (return for +5V, hsync, vsync)
4 TMDS data 4- 16 Hot Plug Detect
5 TMDS data 4+ 17 TMDS data 0-
6 DDC Clock 18 TMDS data 0+
7 DDC Data 19 TMDS data 0/5 Shield
8 Analog Vertical Sync 20 TMDS data 5-
9 TMDS data 1- 21 TMDS data 5+
10 TMDS data 1+ 22 TMDS Clock Shield
11 TMDS data 1/3 Shield 23 TMDS Clock +
12 TMDS data 3- 24 TMDS Clock -
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4.2 Factory Preset Display Modes
Stand Resolution Horizontal Frequency(kHZ) Vertical Frequency(Hz)
VGA 640×480 @60Hz DMT 31.469 59.940
VGA 640×480 @67Hz MAC 35.000 66.667
VGA 640×480 @72Hz DMT 37.861 72.809
VGA 640×480 @75Hz DMT 37.500 75.000
Dos-mode 720×400 @70Hz DOS 31.469 70.087
SVGA 800×600 @56Hz DMT 35.156 56.250
SVGA 800×600 @60Hz DMT 37.879 60.317
SVGA 800×600 @72Hz DMT 48.077 72.188
SVGA 800×600 @75Hz DMT 46.875 75.000
SVGA 832×624 @75Hz 49.725 74.550
XGA 1024×768 @60Hz DMT 48.363 60.004
XGA 1024×768 @70Hz DMT 56.476 70.069
XGA 1024×768 @75Hz DMT 60.023 75.029
WSXGA 1600×900 @60Hz DMT 60.000 60.000
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4.3 Panel Specification 4.3.1 General Features LM200WD1-TLC1 is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode Fluorescent Lamp (CCFL) 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 20.0 inch diagonally measured active display area with HD+ resolution (900 vertical by 1600 horizontal pixel array) Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot, thus, presenting a palette of more than 16,7M colors with Advanced-FRC (Frame Rate Control). It has been designed to apply the interface method that enables low power, high speed, low EMI. FPD Link or compatible must be used as a LVDS (Low Voltage Differential Signaling) chip. It is intended to support applications where thin thickness, wide viewing angle, low power are critical factors and graphic displays are important. In combination with the vertical arrangement of the sub-pixels, the LM200WD1-TLC1 characteristics provide an excellent flat panel display for office automation products such as monitors.
4.3.2 Display Characteristics
Active screen size 20.0 inches (508.05mm) diagonal
Outline Dimension 462.8(H) x 272.0(V) x 14.5(D) mm(Typ.)
Pixel Pitch 0.0922*RGB(H)mm x 0.2766(V)mm
Pixel Format 1600 horizontal By 900 vertical Pixels. RGB stripe arrangement
Q34FPE19P06 CASE EEL19 Q01G6064 1 SCREW Q12G6600 6 FOOT Q15G0421801CK1 MAIN_FRAME_LPL Q33G0295AED 1L0100 HINGE RELEASE BUTTON Q34G0562AED 1S0130 AOC-936 BASE Q34G0584AEDA1B0100 BEZEL(L20WA-936)
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Q34G0585AEDA4S0100 REAR COVER(L20WA-936) Q40G 20N61534A RATING LABEL Q40G0002615A72 USB POP LABEL Q40G0002615A78 DVI VISTA LABEL+EPEAT+EPA (52X15MM) Q44GA068101 EPS Q44GA068201 EPS Q45G 88609122 EPE BAG FOR MONITOR Q50G 4 10 TIE Q52G 1185 99 BIG CARTON TAPE FOR AOC Q85G0119101 SHIELD USB8QB3 USB BOARD
CN511 033G3802 5 BH F CONNECTOR 5PIN CN512 088G 352 2 TN USB CONN
715G2663 2 USB PCB 18.5X60X1.6MM FR-1 S/S 1OZ USB9QA1C USB BOARD
CN501 033G3802 5B Y W WEAFER CN502 088G 351 2B TN USB CONN C503 065G0603104 12 CER2 0603 X7R 16V 100N P C501 065G0603509 31 CHIP 5PF +-0.5PF 50V NPO C502 065G0603509 31 CHIP 5PF +-0.5PF 50V NPO
FB501 071G 56K121 M CHIP BEAD 709G3501 QS001 CONSUMPTIVE ASS'Y 715G3501 2 USB PCB 18X40X1.6MM FR-1 S/S 1OZ 052G 1185 MIDDLE TAPE Q41G2009615 7A 2036VA QSG Q41G780A61566A WARRANTY CARD Q45G 76 28CK2 R PE BAG Q70G2001615 3C 2036VA CD MANUAL 040G 45762420A LABEL 25X6MM 040G 58162435A P/N LABEL FOR MANUAL PE BAG 052G 1185 MIDDLE TAPE Q45G 88609141 EPE BAG 052G 1185 MIDDLE TAPE Q45G 99606 24 ESD INSULATING PE BAG