AOC 198PW Schematic

19” LCD TV AOC 198PW

Service

30kHz- 82kHz

TABLE OF CONTENTS

Description Page Description Page

Table Of Contents.......……..............................…........1

Revision List.…............................................……......2

Important Safety Notice.………….......................……......3

1. Monitor Specification..............................………........4

2. Operating Instructions…………………….……….......5

2.1 Front Panel Control Knobs..……………...................5

2.2 OSD Operations……..........…...........…...........6

2.3 Factory modes adjustment.…............……...............8

2.4 How To Connect .………........................…............9

2.5 ISP Instruction ……..............……………............12

3 Input/Output Specification…………..........................16

3.1 Input Signal Connector……......................................16

3.2 RGB Input Signal Timing …….....……......................17

4. Mechanical Instructions…………………..................18

5. Repair Flow Chart ……………………….……….....23

6. PCB Layout ………….……………………....….......29

6.1 Main Board.………….….......................................29

6.2 Power Board…………..……..............................31

6.3 Key Board…………...................................34

6.4 IR Board …................….......................36

6.5 DC-DC Board....…...………...............................36

7. Schematic Diagram.……....................................37

7.1 Main Board.………………………………..….37

7.2 Power Board…..…....………………….......47

7.3 Tuner Board..………...........................…..49

7.4 Earphone Board..………...........................…..50

7.5 IR Board..……….……...........................…..51

7.6 Key Board…………………...........................…..52

7.7 USB Board..…………..................................…..53

7.8 Adapter Board..………….............................…..54

8. Block Diagram…………..….……………………...55

8.1 Main Board………….…..………………………..55

8.2 Exploded View…....……....................................56

9.BOM List…………...……...................................57

Horizontal Frequency

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

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19” LCD TV AOC 198PW

Revision List

Version Release Date Revision Instructions TPV Model

A00 Apr.-28-2007 Initial Release V19HM3MDW4A1UP

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19” LCD TV AOC 198PW

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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19” LCD TV AOC 198PW

1. Monitor Specifications

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19” LCD TV AOC 198PW

2. Operations Instructions

2.1 Front Panel Control Knobs

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19” LCD TV AOC 198PW

2.2 OSD Operations

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19” LCD TV AOC 198PW

Function Control Illustration

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19” LCD TV AOC 198PW

LED Indicators

Setup Bluetooth Software

The attached CD has blue tooth setup software ,you should setup the blue tooth software when you use this

application . please Click here “ Setup Bluetooth Application

setting .

”, then follow up the setup guide to complete the

2.3 Factory modes adjustment

Into the factory mode

Turn on power, pull out the power cord, press the Menu button, and then plug the power cord, that will Auto

adjust the picture to default. At the same time the factory OSD will be at the left top of the panel.

A, Bias adjustment

Set the Contrast

Set the Brightness

B. Gain adjustment:

Move cursor to “-F-” and press MENU key

Adjust 7800k color-temperature

to 50.

to 80.

1、Select the “AUTO LEVEL” option to auto adjust the picture to default,

2、Press “MENU” button, adjust 7800K color-temperature and the parameter is

x = 296 ±20, y = 311 ±20, Y = 180 ±10 cd/m

Adjust 6500k color-temperature

1、Select the “AUTO LEVEL” option to auto adjust the picture to default,

2、Press “MENU” button, adjust 6500K color-temperature and the parameter is

x = 313 ±20, y = 329 ±20, Y = 180 ±10 cd/m

Turn off the Power-button to quit from factory mode.

2

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19” LCD TV AOC 198PW

2.4 How To Connect

Performing the procedure below.

1. Connect the power cable to the AC port on the back of the monitor.

2. Connect one end of the 15-pin DVI-I cable to the back of the monitor and connect the other end to the computer's

D-Sub port.

3. Connect the audio cable to audio in port on the back of the monitor

4. Connect the microphone cable to audio in port on the back of the monitor

5. Turn on your monitor and computer.

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19” LCD TV AOC 198PW

Attaching Wall Mounting Arm

Preparing to Install An Optional Wall Mounting Arm

1. Remove the lid on back cover,

2. Remove the screws on back cover,

3. Remove the screws on stand,

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19” LCD TV AOC 198PW

4. Re-install back cover,

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19” LCD TV AOC 198PW

2.5 ISP Instruction

1) ISP tools requirement

(1) 25PIN LPT cable,

(2) MYSON burn-in board,

(3) DVI-VGA cable

2) Change to VGA Mode.

(1) Run MYSON MCU ISP burn-in tool,

(2) Set parameter,

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19” LCD TV AOC 198PW

MCU Type

Select this option

Burn-in speed,

select default value

Click “create security file”

option.

Picture 1

Select ok

Picture 2

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19” LCD TV AOC 198PW

(3) Lode burn-in file,

Select the MCU software in 198PW ISP_CODE, then click “Open” button, See picture 3,

Open

Picture 3

(4) When the file was loaded, then click “confirm” button, See Picture 4.

Confirm

Picture 4

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19” LCD TV AOC 198PW

(5) Click “RUN”, burn-in is in progress, See the picture 5,

Picture 5

(6) burn-in is completed, See the picture 6,

(6) End

Picture 6

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19” LCD TV AOC 198PW

3. Input/Output Specification

3.1 Input Signal connector

Pin Assignments

DVI Interface Definition

DVI Connector pin Assignments

Plug and Play

Plug & Play DDC2B Feature

This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows

the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate

additional information about its display capabilities.

The DDC2B is a bi-directional data channel based on the I2C protocol. The host can request EDID

information over the DDC2B channel.

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19” LCD TV AOC 198PW

3.2 RGB Input Signal Timing

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19” LCD TV AOC 198PW

4. Mechanical Instructions

1. Remove the screws marked in red to release the back cover,

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19” LCD TV AOC 198PW

2.Remove the screws marked in red to release the stand base。

3. Remove the screws marked in red to release the shield。

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19” LCD TV AOC 198PW

4. Remove the screws marked in red to release the AV iron。

5. Remove the screws marked in red to release the main board,

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19” LCD TV AOC 198PW

6. Remove the screws marked in red to release the connect board,

7. Remove the screws marked in red to release the power board,

8. Remove the screws marked in red to release the front panel,

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19” LCD TV AOC 198PW

9. Remove the screws marked in red to release the main frame,

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19” LCD TV AOC 198PW

5. Repair Flow Chart

5.1 No power (No LED Indicator)

No power

NG

Plug in power cord and interface

Replace L101

Replace U101

Check power cord and board

interface

OK

Check L101

OK

Check U101

OK

Check D101, R102, C103, C110

Check L101、L102

OK

NG

Replace L101，L102

NG

Check D101, R102, C103, C110

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19” LCD TV AOC 198PW

5.2 No display (LED indicator green)

No display

Check the source

OK

NG

Reset the source

Check LVDS cable

OK

NG

Replace LVDS cable

Check 12V power supply

OK

Check main board power supply

OK

NG

Check U404

NG

Return to “5.1”

Check U404

OK

Check I2C communication

OK

Check panel

NG

Replace I2C Communication pertinent circuit

NG

Replace panel

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