AOC N936S User manual

18.5" LCD Monitor AOC N936Sw
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Service
Service
Service
Horizontal Frequency
30-81 kHz
TABLEOFCONTENTS
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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...............……………….......27
4.1.Input Signal Connector...............………..................27
4.2.Preset Display Modes……..........................27
4.3.Panel Specification…………..………………………..28
5.Block Diagram….........................................................30
5.1.Main Board…..….............................................30
5.2.Power Board…………..…………………………......31
6.Schematic…………..….........................................32
6.1.Main Board..…….…...........................................32
6.2.Power Board..……….........................................36
7.PCB Layout..………..............................................38
7.1.Main Board………..…........................................38
7.2.Power Board….…..............................................40
7.3.Key Board………..…..........................................42
7.4.USB Board………..….........................................42
8.Maintainability………............................................43
8.1.Equipments and Tools Requirement…...............43
8.2.Trouble Shooting…..………...............................44
9.White-Balance,Luminance Adjustment…............48
10.Mechanical Instructions …............ ..............50
11.Monitor Exploded View……................................64
12.BOM List…………..……………………….............71

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Revision List
Revision Date Revision History Remark
A00 Aug.-01-2011 Initial release
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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.
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
LCD Panel
Model number N936Sw
Driving system TFT Color LCD
Viewable Image Size 47.0cm diagonal
Pixel pitch 0.3mm(H) x 0.3mm(V)
Video R, G, B Analog lnterface & Digital Interface
Separate Sync. H/V TTL
Display Color 16.7M Colors
Dot Clock 85.5MHz
Resolution
Horizontal scan range 30 kHz - 81 kHz
Horizontal scan Size(Maximum) 409.8mm
Vertical scan range 55 Hz - 75 Hz
Vertical scan Size(Maximum) 230.4mm
Optimal preset resolution 1366x768 (60 Hz)
Highest preset resolution 1366x768 (60 Hz) )
Plug & Play VESA DDC2B/CI
Input Connector D-Sub 15pin
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM
Power Source 100-240V~, 50/60Hz
Power Consumption Typical < 25W
Standby < 1 W
Physical
Characteristics
Connector Type 15-pin Mini D-Sub
Signal Cable Type Detachable
Dimensions & Weight:
Height (with base) 358.66mm
Width 463.14mm
Depth 186mm
Weight (monitor only) 3.13 kg
Weight (with
packaging) 4.18kg
Environmental
Temperature: Operating 0° to 40°
Non-Operating -20°to 60°
Humidity: Operating 10% to 85% (non-condensing)
Non-Operating 5% to 80% (non-condensing)
Altitude: Operating 0~ 3000m (0~ 10000 ft )
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 boards 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.
HOST Computer
AC-IN
100V-240V
Power board
(Include: adapter, inverter)
Flat Panel and
CCFL backlight
Main Board RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
Video signal DDC
Monitor Block Diagram
Key board USB board*2

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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 to turn on or turn off the monitor.
4 : 3 or wide / Up
Press key to change the screen aspect ratio between standard 4:3 format or Wide 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.

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Auto / Down
Auto configure hot key: When the OSD is closed, press Auto button to do auto configure.
Cable Connections On Back of Monitor and Computer
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
Eco mode ---DCR, Standard, Text, Internet, Game, Movie, Sports
DCR

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Standard
Text
Internet

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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.

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Color Boost --- Full Enhance, Nature Skin, Sky-Blue, Green Field, Auto Detect, Demo, Off, Exit
Full Enhance
Nature Skin
Sky-Blue

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Green Field
Auto Detect
Demo

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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
Brightness
Contrast
Gamma

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Exit
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.
Image Setup --- Clock, Phase, H.Position, V.Position, Exit
Clock
Phase

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H.Position
V.Position
Exit
Notes : When the input source is digital signal like DVI or HDMI, Image Setup can not be adjusted.

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Color Temperature ---User-R , User-G , User-B, Normal, Warm, Cool, sRGB, Exit
User-R
User-G
User-B

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Normal
Warm
Cool

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sRGB
Exit
Notes :
One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly.

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Picture Boost --- V.Position, H.Position, Contrast, Brightness, Frame Size, Bright Frame, Exit
V.Position
H.Position
Contrast