AOC e2237Fw Service Manual

21.5" LCD Monitor

AOC e2237Fw

Service

		Horizontal Frequency
		3080kHz
	Table of Contents
Description	Page Description	Page

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 Menu…..............................................................7 4.Input/Output Specification...............……………….......18

4.1.Input Signal Connector...............………..................18 4.2.Factory Preset Display Modes……..........................19 4.3.Panel Specification…………..………………………..20 5.Block Diagram….........................................................22 5.1.Main Board…..….............................................22

5.2.Power Board…………..…………………………......23

6.Schematic…………..….........................................24

6.1.Main Board..…….…...........................................24

6.2.Power Board..……….........................................28 6.3.LED Board……..………..………………………30 6.4.Light Sensor Board…..………............................31 6.5.Key Board…............……....................................32 7.PCB Layout..………..............................................33 7.1.Main Board………..…........................................33 7.2.Power Board….…..............................................34 7.3.LED Board……..………..………………………36 7.4.Light Sensor Board…..………............................36 7.5.Key Board………..…..........................................37 8.Maintainability………............................................39 8.1.Equipments and Tools Requirement…...............39 8.2.Trouble Shooting…..………...............................40 9.White-Balance,Luminance Adjustment…............44 10.Monitor Exploded View……................................46 11.BOM List…………..……………………….............48

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

Revision List

Version	Release Date	Revision History	TPV Model Name

A00	Aug.17,2010	Initial release	TI9AA82BBXA2HN

A01	Dec.14,2010	Add New Model	TI9AA82EBXRMHZ

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 radiations 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.)

1. Monitor Specifications

	Model number	e2237Fw
	Driving system	TFT Color LED
	Viewable Image Size	54.7 cm

LCD Panel	Pixel pitch	0.248(H)x0.248(V)mm
LCD Panel	Video	R, G, B Analog lnterface & Digital Interface
	Video	R, G, B Analog lnterface & Digital Interface
	Separate Sync.	H/V TTL
	Display Color	16.7M Colors
	Dot Clock	148.5MHz

	Horizontal scan range	30 kHz - 80 kHz
	Horizontal scan Size(Maximum)	476.64mm

	Vertical scan range	55 Hz - 75 Hz
	Vertical scan Size(Maximum)	268.11mm

	Optimal preset resolution	1920 x 1080 (60 Hz)
Resolution	Highest preset resolution	1920 x 1080 (60 Hz)

	Plug & Play	VESA DDC2B/CI
	Input Connector	D-Sub 15pin & DVI-D
	Input Video Signal	Analog: 0.7Vp-p(standard), 75 OHM, Positive & DVI-D
	Input Video Signal	Digital Interface (TMDS)
		Digital Interface (TMDS)

	Power Source	100~240VAC, 50/60Hz
	Power Consumption	On: <25W

		Standby < 0.5 W
		Standby < 0.5 W
	Connector Type	15-pin Mini D-Sub & DVI-D
Physical	Signal Cable Type	Detachable

		Height (with base)	396.86 mm
		Height (with base)	396.86 mm
		Width	540.84mm
		Depth	132.5mm
Characteristics	Dimensions & Weight:	Weight (monitor only)	3.24 kg
Characteristics	Dimensions & Weight:	Weight (with packaging)	5.74kg
		Weight (with packaging)	5.74kg

	Temperature:	Operating	0° to 40°
	Temperature:	Non-Operating	-25°C - +55°C
		Non-Operating	-25°C - +55°C
Environmental	Humidity:	Operating	10% - 85% (non-condensing)
Environmental	Humidity:	Non-Operating	5% - 93% (non-condensing)
		Non-Operating	5% - 93% (non-condensing)
	Altitude:	Operating	0~ 12,000 ft
	Altitude:	Non-Operating	0~ 40,000 ft
		Non-Operating	0~ 40,000 ft

2. LCD Monitor Description

The LCD monitor will contain a main board, a converter board, a light sensor board, a LED board and a key board which house the flat panel control logic, brightness control logic and DDC.

The converter board will provide DC to DC Inverter voltage to drive the backlight of panel.

Monitor Block Diagram

	LED Drive.
	LED Drive.	Flat Panel and
		Flat Panel and
		LED backlight

Converter board

Main Board

RS232 Connector

For white balance

adjustment in factory

mode

Light Sensor Board

LED Board

Key Board

Video signal, DDC

Adapter

HOST Computer

AC-IN 100V-240V

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 quality can be adjusted to your personal preferences.

3.2 Control Buttons and Connections

Power Key

Press the Power button continuously about 2 second to turn off the monitor.

Eco Mode/DCR/i-care hot key

Press the Eco key continuously to select the Eco mode of brightness and DCR on when there is no OSD (Eco mode hot key may not be available in all models).

i-care can detect the intensity of surrounding lights and automatically adjusts the monitor brightness according to different light intensity

Contrast adjustment hot key

When there is no OSD, press left hotkey to active volume adjustment bar, press left or right to adjust contrast(Only for the models without speakers).

4:3 or wide image ratio hot key

When there is no OSD, press left hotkey continuously to change 4:3 or wide image ratio. (If the product screen size is 4:3 or input signal resolution is wide format, the hot key is disabling to adjust.)

Source hot key

When the OSD is closed, press Source (or Auto/Source) button will be Source hot key function (Only for the models with dual or more inputs). Press Source button continuously to select the input source showed in the message bar, press Menu/Enter button to change to the source selected.

Auto configure hot key

When the OSD is closed, press Auto/Source button continuously about 2 second to do auto configure (Only for the models with dual or more inputs).

1.Power

2.Analog (DB-15 VGA cable)

3.DVI

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 (Optional – Requires a video card with DVI port) - 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.

If your monitor displays an image, installation is complete. If it does not display an image, please refer Troubleshooting.

3.3 OSD Menu

1)Press Menu (Power) button to activate the OSD window. Press left, right, up, down button to navigate through the functions. Once the desired function is highlighted, press Menu (Power) button to activate submenu.

2)In sub-menu, Press up, down button to navigate through the functions. Once the desired function is highlighted, press left, right button to change the setting. Press Menu (Power) button to return to superior menu.

3)If you want to adjust any other function, repeat steps 1-2.

4)To exit OSD windows, select “exit” icon on main OSD, then press Menu (Power) button.

5)OSD Lock Function: To lock the OSD, press and hold the Left 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 Left button while the monitor is off and then press power button to turn the monitor on.