AOC 716VWY Schematic

17” LCD Color Monitor AOC 716Vwy

1

T77HRTNQMWAC8N

Service

Horizontal Frequency

55.5 kHz - 70.6 kHz

TABLE OF CONTENTS

Description Page Description Page

N

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.Control Button…………….…..............……...............6

3.3.Adjusting the Picture...........................…............7

4.Input/Output Specification............……………............9

4.1.Input Signal Connector............………….................9

4.2 Power Supply Requirement…………………………10

4.3.Factory Preset Display Modes.........................10

4.4.Panel Specification.....……...……………..................11

5.Block Diagram………...................…………................13

5.1.Software Flow Chart……………………................13

5.2.Electrical Block Diagram………………..…............16

6.Schematic…………………...................................…17

6.1.Main Board........................................................17

6.2. Power Board....…..….….......................................22

7.PCB Layout..……………….......................................25

7.1.Main Board……..………........................................25

7.2.Power Board………...............................................27

7.3Key Board…………...…….....................................28

8.Maintainability…………….........................................29

8.1.Equipments and Tools Requirement...............29

8.2.Trouble Shooting………….....................................30

9.White-Balance Luminance adjustment…….….....36

10.Monitor Exploded View…………………….….........38

11.BOM List….........................................................39

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

17” LCD Color Monitor AOC 716Vwy

2

Revision List

Revision

Date Revision History TPV Model

A00 Jul.-13-07 First Version Release

T77HRTNQMWAC8N

17” LCD Color Monitor AOC 716Vwy

3

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.)

17” LCD Color Monitor AOC 716Vwy

4

1. Monitor Specifications

Items Descriptions

Driving system TFT Color LCD

Type HSD170MGW1-B00

Size 43.2cm (17")

Pixel pitch 0.255mm( H )x 0.255mm( V )

Viewable angle 160˚ (H) 160˚ (V) (TYPE)

LCD Panel

Response time (type) 8 ms

R,G,B Analog Interface

Video

Digital Interface

Connector

15-pin D-Sub

Video Signal

Analog:0.7Vp-p(standard),

75 OHM, Positive

Sync. Type H/V TTL

H-Frequency

55.5 kHz - 70.6 kHz

Input

V-Frequency

60 Hz - 75 Hz

ON Mode ≤37W

Power Consumption

OFF Mode ≤2W

Contrast Ratio 600:1

Dot Clock 135 MHz

White Luminance 300cd/m

2

Max. Resolution

1440 x 900 (60 Hz)

Display Color 16.2M colors

Plug & Play VESA DDC2B

TM

Power Source 100~240VAC,47~63Hz

Weight (monitor only)

3.1 kg

Environmental

Considerations

Operating Temp: 5°C to 35°C

Storage Temp: -20°C to 60°C

Operating Humidity: 10% to 85%

Regulations

CCC/cUL/FCC/CE/TCO03/RoHS

17” LCD Color Monitor AOC 716Vwy

5

2. LCD Monitor Description

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

Monitor Block Diagram

AC-IN

100V-240V

Power Board

(Include: adapter, inverter)

Flat Panel and

CCFL backlight

RS232 Connector

For white balance

adjustment in factory

mode

CCFL Drive.

Video signal, DDC

Key Board

HOST Computer

Main Board

17” LCD Color Monitor AOC 716Vwy

6

3. Operating Instructions

3.1 General Instructions

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

1. Auto Config

2. Eco Mode/ down

3. Up

4. Menu / Enter

5. Power Button & Indicator

17” LCD Color Monitor AOC 716Vwy

7

3.3 Adjusting the Picture

OSD Settings

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

· Press+ or - to navigate through the functions. Once the desired function is highlighted, press the

MENU-buttonto activate it.If the function selected has a sub-menu, press or again to navigate through the

sub-menu functions.Once the desired function is highlighted, press MENU-button to activate it.

· Press+ or - to change the settings of the selected function. To exit and save, select the exit function. If you

want to adjust any other function, repeat steps 2-3.

· OSD Lock Function: To lock the OSD, press and hold the MENUbutton while the monitor is off and then

press power button to turn the monitor on. To un-lock the OSD - press and hold the MENUbutton while the

monitor is off and then press power button to turn the monitor on.

· Press Exit key continually for 7 sec. to turn on or off DDC-CI.

OSD functions

17” LCD Color Monitor AOC 716Vwy

8

17” LCD Color Monitor AOC 716Vwy

9

4. Input/output Specification

4.1 Input Signal Connector

D-SUB connector

DVI connector

17” LCD Color Monitor AOC 716Vwy

10

4.2 Power Supply Requirement

A/C Line voltage range : 100 V ~ 240 V

A/C Line frequency range

: 50 ± 3Hz, 60 ± 3Hz

Current : TBD

Peak surge current : < 55A peak at 240 VAC and cold starting

Leakage current : < 3.5mA

Power line surge

: No advance effects (no loss of information or defect) with a

maximum of 1 half-wave missing per second

DC output Voltage : 12VDC ± 5%

Current (max) : 3.5 Amp (12V)

4.3. Factory Preset Display Modes

17” LCD Color Monitor AOC 716Vwy

11

4.4. Panel Specification

HannStar Display model HSD170MGW1-B00 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, a

driving circuit and a back light system. This TFT LCD has a 17.0 inch diagonally measured active display area with

XGA resolution (900 vertical by 1440 horizontal pixel array) and can display up to 16.2M (6-bit+FRC)colors.

4.4.1 Features

_ 17.0 WXGA+ for Monitor application

_ High Resolution: 1440*900

_ 2-ch LVDS interface system

_ LCD Timing Controller

_ Wide Viewing Angle

_ RoHS compliance

4.4.2 Display Characteristics

4.4.3 Electrical Characteristics

1. TFT LCD Module

17” LCD Color Monitor AOC 716Vwy

12

2. Backlight Unit

4.4.4 Optical Characteristics

Measuring Condition

_ Measuring surrounding: dark room

_ Lamp current IBL: 7.5±0.1mA, lamp freq. FL=50 KHz, Inverter: TDK TBD315NR-1

_ VDD=5.0V, fV=60Hz

_ Ambient temperature: 25±2oC

_ 30min. Warm-up time.

17” LCD Color Monitor AOC 716Vwy

13

5. Block Diagram

5.1 Software Flow Chat

1

2

N

Y

5

Y

N

1

Y

N

12

Y

N

7

Y

N

6

4

3

8

9

14

11

13

Y

N

15

Y

N

16

17

19

Y

N

18

17” LCD Color Monitor AOC 716Vwy

14

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?

17” LCD Color Monitor AOC 716Vwy

15

5.2 Electrical Block Diagram

5.2.1 Main Board

CN302

DVI

Connector

Digital

Video

Signal

U401

MCU

RTD2120L-LF

U501

Scalar IC RTD2525LH

(Include ADC, OSD)

U403

EEPROM

AF24BC16

CN301

D-Sub

Connector

H sync

V sync

RGB

EPR_SDA

EPR_SCL

LCD Interface

CN601

Key Board Control

CN202

X401

Crystal

24MHz

CLKOUT