AOC 511VWB Schematic

15” LCD Color Monitor AOC 511Vwb

Service

Horizontal Frequency

30kHz – 60kHz

TABLE OF CONTENTS

Description

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............……………............8

4.1 Input Signal Connector............………….................8

4.2 Factory Preset Display Modes......................................9

4.3 Power Supply……..…………………...…….…..………..9

4.4 Panel Specification.....……………………....................9

5. Block Diagram……...................…………................11

5.1 Soft Flow Chart….………………..……..……....….......11

SAFETY NOTICE

Page Description Page

5.2 Electrical Block Diagram….……………….......….….13

6. Schematic……………...........................................…15

6.1 Main Board.……...……............................................15

6.2 Inverter Board..………..……....................................21

6.3 Adapter Board….………..…….................................22

7. PCB Layout..…….………….......................................23

7.1 Main Board…………….............................................23

7.2 Adapter Board…..………..........................................24

7.3 Key Board………………...........................................26

7.4 Inverter Board…………...........................................26

8. Maintainability………..............................................26

8.1 Equipments and Tools Requirement………..............26

8.2 Trouble Shooting…….………...................................27

9. White-Balance, Luminance adjustment......................32

10. Monitor Exploded View……….……………...............34

11. BOM List………........................................................35

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

15” LCD Color Monitor AOC 511Vwb

Revision List

Revision Date Revision History TPV Model

A00 Feb-28-07 Initial Release T56CRXNQWYACNJ

15” LCD Color Monitor AOC 511Vwb

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.)

15” LCD Color Monitor AOC 511Vwb

1. Monitor Specifications

Model number 511Vwb

Driving system TFT Color LCD

Size 15.4” 16:10

LCD Panel

Resolution

Pixel pitch 0.258mm( H ) × 0.258mm( V )

Video R,G,B Analog Interface

Separate Sync. H/V TTL

Display Color 262k

Dot Clock 74.7MKz

Horizontal scan range 30kHz – 63kHz

Horizontal scan range(Maximum) 331.2mm

Vertical scan range 55Hz-60Hz

Vertical scan range(Maximum) 207mm

Optimal preset resolution 1280 x 800 (60 Hz)

Highest preset resolution 1280 x 800 (60 Hz)

Plug & Play

Input Connector D-Sub 15-pin

Input Video Signal

Power Source DC12V, 3.5A

Power Consumption

VESA DDC2B

Analog:0.7Vp-p(standard), 75 OHM, Positive

Power on: < 15W

Standby: ≦ 1W

DDC-CI

Physical Characteristics

Environmental

Connector Type 15-pin Mini D-Sub

Signal Cable Type Detachable

Dimensions & Weight:

Height (with base) 329.2mm

Width 365mm

Depth 146mm

Weight (monitor only) 1.6Kg

Weight (with packaging) 2.9Kg

Temperature:

Operating 0°- +50°

Non-Operating -20° - 60°

Humidity:

Operating 10% to 85% (non-condensing)

Non-Operating 5% to 80% (non-condensing)

Altitude:

Operating 0~3000m (0~10000 ft)

Non-Operating 0~5000m (0~15000 ft)

Regulations CCC, FCC, CE, RoHS

15” LCD Color Monitor AOC 511Vwb

2. LCD Monitor Description

The LCD MONITOR will contain a main board, an inverter board, a keypad board and internal adapter which house

the flat panel control logic, brightness control logic and DDC.

The Inverter board will drive the backlight of panel and the DC-DC conversion.

Monitor Block Diagram

CCFL Drive.

Flat Panel and

CCFL backlight

Inverter board

Main board

Key board

RS232 Connector

For white balance

adjustment in factory

mode

AC-IN 100V-240V

Adapter board

HOST Computer

Video signal, DDC

15” LCD Color Monitor AOC 511Vwb

3. Operating Instructions

3.1 General Instructions

Press the power button to turn the monitor on or off. The other 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.

• Press the power button to turn on the monitor position. The power indicator will light up.

3.2 Control Buttons

- Power Indicator:

Green — Full Power Mode

Orange — Active-off Mode

- Power Button:

Press this button to turn the monitor ON or OFF.

- Auto Config / Exit:

1. When OSD menu is in active status, this button will act as EXIT-KEY (EXIT OSD menu).

2. When OSD menu is in off status, press this button for 2 seconds to activate the Auto Adjustment function. The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.

- Eco Mode / - :

Select the display model or adjust the value.

- + : Move the cursor or adjust the value.

- Menu / Enter : Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD

menu when in Brightness /Contrast Adjust OSD status.

1. Power Button/ LED 2. Auto Adjust button / Exit

3. Eco Mode / - 4. +

5. Menu / Enter

15” LCD Color Monitor AOC 511Vwb

3.3 Adjusting the Picture

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 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.

3. 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.

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.

5. Press Auto key continually for 7 sec. to turn on or off DDC-CI.

Luminance Adjust Range Description Brightness 0-100 Backlight Adjustment Contrast 0-100 Contrast from Digital-register.

Standard Standard Mode Text Text Mode

Eco mode

Gamma

DCR

Image Setup Clock 0-100 Adjust picture Clock to reduce Vertical-Line noise. Focus 0-100 Adjust Picture Phase to reduce Horizontal-Line noise H. Position 0-100 Adjust the vertical position of the picture. V. Position 0-100 Adjust the horizontal position of the picture. Color Temp. 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 User-B Blue Gain from Digital-register

Internet Internet Mode Game Game Mode Movie Movie Mode Sports Sports Mode Gamma1 Adjust to Gamma1 Gamma2 Adjust to Gamma 2 Gamma3 Adjust to Gamma 3 Off Disable dynamic contrast ratio On Enable dynamic contrast ratio

15” LCD Color Monitor AOC 511Vwb

User-G Green Gain Digital-register. User-R Red Gain from Digital-register User-Y Yellow Gain from Digital-register User-C Cyan Gain from Digital-register

User-M Magenta Gain from Digital-register Color Boost 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 Demo on or off Disable or Enable Demo Picture Boost Frame Size 0-100 Adjust Frame Size Brightness 0-100 Adjust Frame Brightness Contrast 0-100 Adjust Frame Contrast Hue 0-100 Adjust Frame Hue Saturation 0-100 Adjust Frame Saturation

Position

H. position Adjust Frame horizontal Position

V. position Adjust Frame vertical Position Bright Frame on or off Disable or Enable Bright Frame OSD Setup H. Position 0-100 Adjust the vertical position of OSD V. Position 0-100 Adjust the horizontal position of OSD Timeout 0-100 Adjust the OSD Timeout Language Select the OSD language Extra Auto Config yes or no Auto adjust the picture to default 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

4. Input/Output Specification

4.1 Input Signal Connector

D-SUB connector

Pin No. Description Pin No. Description

1. Red Video 9. +5V Supply

2. Green Video 10. Detect Cable

3. Blue Video 11. N.C.

4. NC 12. DDC-Serial Data

5. Ground 13. H-Sync

6. Red Ground 14. V-Sync

7. Green Ground 15. DDC-Serial Clock

8. Blue ground

Analog Connector

11 15

15” LCD Color Monitor AOC 511Vwb

4.2 Factory Preset Display Modes

Standard Resolution Horizontal Frequency (kHz) Vertical Frequency(Hz)

VGA 640 x 480 31.47kHz 60. 0Hz

800 x 600 35.156 kHz 56. 0Hz

SVGA

800 x 600 37.879 kHz 60. 0Hz

XGA 1024 x 768 48.363 kHz 60. 0Hz

1280 x 720 44.679 kHz 60. 0Hz

WXGA

1280 x 768 47.776 kHz 60. 0Hz

1280 x 800 49.306 kHz 60. 0Hz

4.3 Power Supply

The power supply should be integrated to the monitor housing.

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

A/C Line frequency range

Current : 1.5A max at 100V; 0.8A max at 240 V

Power line surge : No advance effects (no loss of information or defect)

Adapter Output Voltage

Current 3.50 Amp (max)

: 50 ± 3Hz, 60 ± 3Hz

With a maximum of 1 half-wave missing per second

12VDC± 5％

4.4 Panel Specification

4.4.1 Display Characteristics

15” LCD Color Monitor AOC 511Vwb

4.4.2 Optical Characteristics

4.4.3 Parameter guide line for CCFL Inverter

TFT LCD Module:

Back Light Unit:

15” LCD Color Monitor AOC 511Vwb

5. Block Diagram

5.1 Soft Flow Chart

15” LCD Color Monitor AOC 511Vwb

1) MCU initializes.

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

disappears.

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?

15” LCD Color Monitor AOC 511Vwb

5.2 Electrical Block Diagram

5.2.1 Main Board

15” LCD Color Monitor AOC 511Vwb

（

C801

）

5.2.2 Inverter/Adapter

AC input

Lamp

Bridge

EMI

Start Circuit: R908, R909, R910

PWM Control IC

Output

Circuit

Feedback Circuit

Rectifier and Filter

Transformer

MOSFET Q901

PWM

Over Voltage Protect

ontrol I

PWM MOSFE Drive

Rectifier diodes

Feedback

Circuit

DC 12V OUTPUT

CN802

12V

DIM

+ 31 hidden pages