AOC I-INC AG191D-19 Schematic

19" LCD Color Monitor I-INC AG191D

Service

Horizontal Frequency

31-80 kHz

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…………………………….......6

3. Operation Instruction…………...............……...........7

3.1.General Instructions...........................…...........7

3.2. Control Button…………….…..............……...............7

3.3 Adjusting the Picture...........................…............8

4. Input/Output Specification............……………............13

4.1.Input Signal Connector............………….................13

4.2.Factory Preset Display Modes.........................14

4.3.Panel Specification.....………………..................15

5. Block Diagram…….…..................…………................17

5.1.Software Flow Chart…………………....….......17

5.2.Electrical Block Diagram…………..…..…………......19

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6.Schematic……………...............................….....20

6.1 Main Board…………..............................................20

6.2 Power Board....……………....................................25

6.3 Audio Board....……...............................................27

7.PCB Layout..………….....................................28

7.1.Main Board……….................................................28

7.2.Power Board…......................................................31

7.3 Audio Board....…….......................................33

7.4.Keypad Board……….....................................33

8. Maintainability………...............................................33

8.1. Equipments and Tools Requirement.....................33

8.2. Trouble Shooting…………....................................34

9. White-Balance, Luminance adjustment...................40

10.Monitor Exploded View……..……………................42

11. BOM List....…….....................................................43

12.Different Parts List…..............................................59

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

19" LCD Color Monitor I-INC AG191D

Revision List

Revision Date Revision History TPV Model

A00 Dec.-20-06 First Version Release

A01 Mar.-27-07 Add new BOM T96HM6DBG6Z3AP

A02 Sep.-18-07 Add new BOM T96HM6DKG6HZAC

A03 Nov.-05-07 Add new BOM T97HM6DKG6HZAC

A04 May.-06-08 Add new BOM

T96HM6DBG6ZHAP

T96HM6DKG6HZAP

T97HM6DCG6HZAN

T97HM6DKG6HZAN

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19" LCD Color Monitor I-INC AG191D

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

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damage the panel.)

19" LCD Color Monitor I-INC AG191D

1. Monitor Specifications

Driving system TFT Color LCD

LCD Panel Size 48cm(19.0")

Pixel pitch 0.294mm(H) x 0.294mm(V)

Video

Input H-Frequency 31KHz – 80KHz

V-Frequency 55 – 75Hz

Display Colors 16.2M Colors

Max. Resolution 1280 x 1024 @75Hz

Plug & Play

EPA ENERGY STAR®

Audio output Rated Power 1.5W rms (Per channel)

Input Connector

Maximum Screen Size

Power Source 100~240VAC,50/60HZ

Environmental

Considerations

R,G,B Analog Interface

Digital(Dual-Input Model)H/VTTL

VESA DDC2B

ON Mode ≤36.7W

OFF Mode ≤2W

D-Sub 15pin

DVI-D 24pin (Dual-Input Model)

Hor. :376.32mm

Ver. :301.056mm

Operating Temp: 0° to 40°C

Storage Temp.: -20° to 60°C

Operating Humidity: 20% to 80%

Dimensions

406(W)×408 (H)×210(D) mm

16.0”(W)×16.1”(H)×8.3”(D)

6.5 kg / 5.0 kg

Weight (GW/NW)

14.3lb/11.0lb

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19" LCD Color Monitor I-INC AG191D

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2. LCD Monitor Description

Assembly Description

The LCD MONITOR will contain a main board, power board, audio 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.

Power board

Include: adapter, inverter)

AC-IN

100V-240V

CCFL Drive.

Monitor Block Diagram

Flat Panel and

CCFL backlight

main board

Audio board

Key board

HOST Computer

RS232 Connector

For white balance

adjustment in factory

mode

Video signal, DDC

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19" LCD Color Monitor I-INC AG191D

Dimensions

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19" LCD Color Monitor I-INC AG191D

3. Operating Instructions

3.1 General Instructions

Press the power button to turn the monitor on or off. The control buttons are located in the front of the monitor.

By changing these settings, the picture can be adjusted to your personal preferences.

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, the power indicator will light up.

3.2 Control Buttons

• Power Button: Press this button to switch ON/OFF of monitor’s power.

• Power Indicator: Green — Power On mode. Orange — Off mode.

• MENU / ENTER: 1. Activate the OSD menu or adjust the function settings and confirmation or 2. Exit OSD menu

when in volume OSD status.

• Volume < >: 1. activates the volume control when the OSD is OFF.

2. Navigate through adjustment icons when OSD is ON or adjust a function when function is activated.

• Auto Adjust button: When OSD menu is in off status, press this button to activate the Auto Adjustment function.

(The Auto Adjustment function is used to optimize the H-Position, V-Position, Clock and Focus.)

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19" LCD Color Monitor I-INC AG191D

3.3 Adjusting the Picture

Adjustment steps:

1. Press the MENU-button to activate the OSD window.

2. Press < or > to select the desired function.

3. Press the MENU-button to select the function that you want to adjust.

4. Press < or > to change the settings of the current function.

5. To exit and save, select the exit function, or leave the monitor alone for 10 seconds. If you want to adjust any

other function, repeat steps 2-4.

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19" LCD Color Monitor I-INC AG191D

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19" LCD Color Monitor I-INC AG191D

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19" LCD Color Monitor I-INC AG191D

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19" LCD Color Monitor I-INC AG191D

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19" LCD Color Monitor I-INC AG191D

4. Input/Output Specification

4.1 Input Signal Connector

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19" LCD Color Monitor I-INC AG191D

4.2 Factory Preset Display Modes

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19" LCD Color Monitor I-INC AG191D

4.3 Panel Specification

HannStar Display model HSD190ME13-A10 is a color active matrix thin film transistor(TFT) liquid crystal display

(LCD) that uses amorphous silicon TFT as a switching device. This model is composed of a TFT LCD panel, the

voltage reference, common voltage, DC-DC converter, column, and row driver circuit. This TFT LCD has a 19-inch

diagonally measured active display area with SXGA resolution (1024 vertical by 1280 horizontal pixel array).

4.3.1 Display Characteristics

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19" LCD Color Monitor I-INC AG191D

4.3.2 Optical Characteristics

4.3.3 Parameter guide line for CCFL Inverter

TFT LCD Module:

Back Light Unit:

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19" LCD Color Monitor I-INC AG191D

5. Block Diagram

5.1 Software Flow Chat

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19" LCD Color Monitor I-INC AG191D

1) MCU initialize.

2) Is the EPROM blank?

3) Program the EPROM by default values.

4) Get the PWM value of brightness from EPROM.

5) Is the power key pressed?

6) Clear all global flags.

7) Are the AUTO and SELECT keys pressed?

8) Enter factory mode.

9) Save the power key status into EPROM.

Turn on the LED and set it to green color.

Scalar initializes.

10) In standby mode?

11) Update the lifetime of back light.

12) Check the analog port, are there any signals coming?

13) Does the scalar send out an interrupt request?

14) Wake up the scalar.

15) Are there any signals coming from analog port?

16) Display "No connection Check Signal Cable" message. And go into standby mode after the message

disappear.

17) Program the scalar to be able to show the coming mode.

18) Process the OSD display.

19) Read the keyboard. Is the power key pressed?

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