AOC I2353Fh User manual

23" LCD Color Monitor AOC i2353Ph I2353Fh
Service
Service
Service
Horizontal Frequency
30-83 KHz
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.Hot Keys…………….…..............……...............6
3.3.OSD Setting…………….…...........................…......7
4.Input/Output Specification............……………............20
4.1.Input Signal Connector............………….................20
4.2.Factory Preset Display Modes…….........................21
4.3.Panel Specification.....………...…………................22
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
5.Block Diagram…….........………….................25
6.Schematic……………........................................26
6.1.Main Board………...........................................26
6.2.Key Board...…….............................................33
7.PCB Layout..………….......................................34
7.1.Main Board………...........................................34
7.2.Key Board…………….....................................35
8.Maintainability……….........................................36
8.1.Equipments and Tools Requirement...............36
8.2.Trouble Shooting………….............................37
9.White-Balance, Luminance Adjustment.............41
10.Monitor Exploded View………..…….…............43
11.BOM List…………………………………...........45

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Revision List
Version Release Date Revision History L&T Model Name
A00 Jun-20-2011 Initial Release
HDBJNZ2LB7IGDNF.LF
HDBJNZ2FB7UMDNF.LF
HDBJNZ2MB75ADNF.LF
A01 Sep-11-2011 Add new model
HDBJNZ2CBMAODNF.LF
HDBJNZ2MB7RODNF.LF
HDBJNZ2CBM8ADNF.LF
HDBJNZ2ABMPMDNF.LF
A02 Oct-27-2011 Add new model HDBJNZ2BBMK2DNF.LF
HDBJNZ2KBME6DNF.LF
A03 Nov-7-2011 Add new model
HDBJNZ2CB7SPDNF.LF
HDBJNZ2TBM1RDNF.LF
HDBJNZ2EB77ADNF.LF
HDBJNZ2CBMSUDNF.LF
A04 Jan-30-2012 Add new model
HDBJNZ2CBMETDNF.LF
HDBJNZ2BBMK5DNF.LF
HDBJNZ2EB7GHDNF.LF

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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
Panel
Model number i2353Ph/ I2353Fh
Driving system TFT Color LED IPS
Viewable Image Size 584.2mm diagoanl
Pixel pitch 0.265mm(H) x 0.265mm(V)
Video R, G, B Analog lnterface & Digital Interface
Separate Sync. H/V TTL
Display Color 16.7M Colors
Dot Clock 180MHz
Resolution
Horizontal scan range 30 kHz – 83 kHz
Horizontal scan Size(Maximum) 533.2mm
Vertical scan range 50 Hz - 76 Hz
Vertical scan Size(Maximum) 312.0 mm
Optimal preset resolution 1920x1080 (60 Hz)
Highest preset resolution 1920x1080 (60 Hz)
Plug & Play VESA DDC2B
Input Connector D-Sub 15pin /HDMI
Input Video Signal
Analog: 0.7Vp-p(standard), 75 OHM, Positive;HDMI ;
TMDS
Power Source 100~240VAC, 50/60Hz
Power Consumption
Active < 35 W (Typical)
Standby < 0.5 W
Physical
Characteristics
Connector Type 15-pin Mini D-Sub,HDMI
Signal Cable Type Detachable
Dimensions & Weight:
Height (with base) 388.3mm
Width 549.5mm
Depth 185.7mm
Weight (monitor only) 2.85kg
Environmental
Temperature:
Operating 0°Cto 40° C
Non-Operating -25°Cto 55°C
Humidity:
Operating 10% to 85% (non-condensing)
Non-Operating 5% to 93% (non-condensing)
Altitude:
Operating 0~ 3,658m (0~ 12,000 ft )
Non-Operating 0~ 12,192m (0~ 40,000 ft )

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2. LCD Monitor Description
The LCD MONITOR will contain a main board,a key and two speakers board which house the flat panel control logic,
brightness control logic and DDC.
Monitor Block Diagram
Flat Panel and
LED backlight
Main Board
Key Board
Adapter
D-SUB
Signal
AC-IN
100V~24
LED Drive.
HDMI
Signal1
Phone
jack
HDMI
Signal2
Speaker

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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.
By changing these settings, the picture can be adjusted to your personal preferences.
3.2 Hotkeys
Power
Press the Power button to turn 0n/off the monitor.
Volume >
When there is no OSD,press hotkey “> ”to activate Volume, and press the Up or Down to change
the setting, press Menu button for confirmation and exit OSD.
Auto/Source/Exit
When the OSD is closed, press Auto/Source/Exit button continuously about 2 second to do auto configure (only for
the models with dual or more inputs).
When the OSD is closed, press Auto/Source/Exit button will be Source hot key function(Only for the models with
dual or more inputs).Press Auto/Source/Exit button continuously to select the input source showed in the message
bar, press Menu/Enter button to change to the source selected.
Clear Vision/ >
1. When there is no OSD, Press the “<” button to activate Clear Vision
2. Use the “>” or “<“buttons to select between weak, medium, strong, or off settings. D efault setting is always “off”
3. Press and hold“ “ button for 5 seconds to activate the Clear Vision Demo, and a message of “Clear Vision Demo: on” will be
display on the screen for a duration of 5 seconds, press Menu or Exit button, the message will disappear, Press and
hold“ “ button for 5 seconds again, Clear Vision Demo will be off.
Clear Vision function will provides the best image viewing experience by converting low resolution and blurry im ages into clear
and vivid images.

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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 sub-menu . 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. If you want to
adjust any other function, repeat steps 2-3.
4) OSD Lock Function: To lock the OSD, press and hold the MENU button while the monitor is off and then
press power button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while
the monitor is off and then press power button to turn the monitor on.
Notes:
1) If the product has only one signal input, the item of "Input Select" is disable to adjust.
2) If the product screen size is 4:3 or input signal resolution is wide format, the item of "Image Ratio" is disable to
adjust.
3) One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly.

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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 to enter.

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4
Press or to adjust
5
Press 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 to enter.

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4
Press or to adjust.
5
Press 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.
Color Setup
1

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Press (Menu) to display menu.
2
Press or to select (Color Setup), 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 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.
User
Red Red Gain from Digital-register
Green Green Gain Digital-register.
Blue Blue Gain from Digital-register
DCB Mode
Full
Enhance on or off Disable or Enable Full Enhance Mode
Nature Skin on or off Disable or Enable Nature Skin Mode
Green Field on or off Disable or Enable Green Field Mode
Sky-blue on or off Disable or Enable Sky-blue Mode
AutoDetect on or off Disable or Enable AutoDetect Mode
DCB Demo on or off Disable or Enable Demo
Picture Boost
1
Press (Menu) to display menu.

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2
Press or to select (Picture Boost), 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 to exit.
Frame Size 14-100 Adjust Frame Size
Brightness 0-100 Adjust Frame Brightness
Contras 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
OSD Setup
1
Press (Menu) to display menu.

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2
Press or to select (OSD Setup), and press to enter.
3
Press or to select submenu, and press to enter.
4
Press or to adjust.
5

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Press 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
Extra
1
Press (Menu) to display menu.
2
Press or to select (Extra), and press to enter.

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3
Press or to select submenu, and press to enter.
4
Press or to adjust.
5
Press to exit.

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Input Select Analog Select Analog Signal 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 Select wide or 4:3 format for display
DDC-CI yes or no Turn ON/OFF DDC-CI Support
Reset yes or no Reset the menu to default
Information Show the information of the main image and
sub-image source
Exit
1
Press (Menu) to display menu.
2
Press or to select (Exit), and press to exit.
Exit Exit the main OSD

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4. Input/Output Specification
4.1 D-SUB CONNECTORS and DVI CONNECTORS
Pin Assignments
Pin Number 15-Pin Side of the Signal Cable Pin Number 15-Pin Side of the Signal Cable
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