AOC 912SW Diagram

19" LCD Color Monitor AOC 912Sw

Service

Service

Service

Horizontal Frequency

30-83 kHz

TABLE OF CONTENTS

Description Page Description Page

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

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

1. Monitor Specification..............................………........3

2. LCD Monitor Description…………………………….......4

3. Operation Instruction…………...............……...........5

3.1. General Instructions...........................…...........5

3.2. Control Button…………….…..............……...............5

3.3 Adjusting the Picture...........................…............6

4. Input/Output Specification............……………............8

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

4.2. Factory Preset Display Modes......…..................8

5. Panel Specification.....………………..................9

5.1. General Feature…….....………………..................9

5.2. Optical Characteristics………………………………10

5.3 Electrical Characteristics…………………………10

6. Block Diagram……...................…………................11

6.1 Software Flow Chart…………………...11

6.2.Electrical Block Diagram……………..….......13

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

7. Schematic……………......................................15

7.1 Main Board....……….......................................15

7.2 Power Board.….……....................................20

8.PCB Layout..…….......................................22

8.1. Main Board………........................................22

8.2. Power Board….......................................25

8.3. Key Board………............….......................27

9. Maintainability……….......................................28

9.1. Equipments and Tools Requirement..............28

9.2. Trouble Shooting………..............................29

9.2.1 Main Board…………..............................29

9.2.2 Power Board………..............................32

9.2.3 Key Board…………..............................34

10 White-Balance, Luminance adjustment...35

11. Monitor Exploded View………………..…....….......36

12. BOM List………………………………..……………37

13. Different Parts List.........…….……........................46

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19" LCD Color Monitor AOC 912Sw

Revision List

Revision Date Revision History TPV Model

A00 Mar.-22-2007 Initial release T97HM5DKWCMMFE

A01 May.-08-2007 Add TPVDW Model in Item 13 T97SM5MDWCA4NE

T98SM5DKWCA1NGE

A02 Nov.-07-2008 Add TPVDW Model in Item 13

T98SM5DKWCA1NBE

T98SM5DKWCA2NGE

2

19" LCD Color Monitor AOC 912Sw

1. Monitor Specifications

Model number 912Sw

Driving system TFT Color LCD

Size 48cm(19.0" 16:10)

LCD Panel

Resolution

Pixel pitch 0.285mm(H) x 0.285mm(V)

Video R, G, B Analog lnterface

Separate Sync. H/V TTL

Display Color 16.2million Colors

Dot Clock 135MHz

Horizontal scan range 30 kHz - 83 kHz

Horizontal scan Size(Maximum) 410mm

Vertical scan range 55 Hz - 75 Hz

Vertical scan Size(Maximum) 256mm

Optimal preset resolution 1440 x 900(60 Hz)

Plug & Play VESA DDC2B™ ,CI

Input Connector D-Sub 15pin

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

Power Source 100~240VAC, 47~63Hz

Power on: < 36W

Power Consumption

Standby: < 1W

Connector Type 15-pin Mini D-Sub

Signal Cable Type Detachable

Dimensions & Weight:

Physical

Characteristics

Environmental

Regulations CCC , cULus ,FCC,TCO 03,EPA,RoHS,TUV/GS

Height (with base) 358.00(mm)

Width 437.5(mm)

Depth 210.00(mm)

Weight (monitor only) 4.5(Kg)

Weight (with packaging) 5.5(Kg)

Temperature:

Operating 0°- +40°

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)

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19" LCD Color Monitor AOC 912Sw

2. LCD Monitor Description

The LCD MONITOR will contain a main board, a power board, an 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 AOC 912Sw

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

1. Power Button & Indicator 2. < / Brightness

3. > / Contrast 4. Auto Config / Exit

5. Menu / Enter

• Power Button / Power Indicator: Press this button to turn the monitor ON or OFF.

Green — Power On mode. Orange — Off mode.

• 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 Volume Adjust OSD status.

• > / Contrast : This button will activate the Contrast control when the OSD is OFF or navigate through adjustment

icons when OSD is ON or adjust a function when function is activated.

• < / Brightness: This button will activate the Brightness control when the OSD is OFF or navigate through

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

• 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.

NOTES:

• Do not install the monitor in a location near heat sources such as radiators or air dusts, or in a place subject to direct

sunlight, or excessive dust or mechanical vibration or shock.

• Save the original shipping box and packing materials, as they will come in handy if you ever have to ship your monitor.

• For maximum protection, repackage your monitor as it was originally packed at the factory.

• To keep the monitor looking new, periodically clean it with a soft cloth. Stubborn stains may be removed with a cloth

lightly dampened with a mild detergent solution. Never use strong solvents such as thinner, benzene, or abrasive

cleaners, since these will damage the cabinet. As a safety precaution, always unplug the monitor before cleaning it

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19" LCD Color Monitor AOC 912Sw

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 2-3.

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19" LCD Color Monitor AOC 912Sw

Main

Menu

Item

Main

Menu

Icon

Sub

Menu

Item

Sub Menu

Icon

Description

Luminance

Image Setup

Image Position

Contrast

Brightness

Focus

Clock

H. Position

V. Position

Warm N/A Recall Warm Color Temperature from EEPROM.

Cool N/A Recall Cool Color Temperature from EEPROM.

sRGB N/A Recall sRGB Color Temperature from EEPROM.

User / Red

User / Green

User / Blue

Sub
Menu
Item

Yes N/A Auto adjusting H/V position, focus, phase.

Sub Menu
Icon

Contrast from Digital-register.

Backlight Adjustment

Adjust Picture Phase to reduce Horizontal-Line noise

Adjust picture Clock to reduce Vertical-Line noise.

Adjust the horizontal position of the picture.

Adjust the vertical position of the picture.

Red Gain from Digital-register.

Green Gain Digital-register.

Blue Gain from Digital-register.

Description

Color Temp.

No N/A Back to main OSD.

H. Position

V. Position

OSD Timeout

Language N/A Set OSD language

Information N/A

Yes N/A Clear each old status of Auto-configuration.

No N/A Do not execute reset, return to main menu.

N/A N/A Exit OSD

Adjust the horizontal position of the OSD.

Adjust the vertical position of the OSD.

Adjust the OSD timeout.

Show the resolution, H/V frequency and input port of
current input timing.

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19" LCD Color Monitor AOC 912Sw

4. Input/Output Specification

4.1 Input Signal Connector

PIN NO.

1. Red 9. +5V

2. Green 10. Detect Cable

3. Blue 11. Ground

4. Ground 12. DDC-Serial Data

5. Ground 13. H-Sync

6. R-Ground 14. V-Sync

7. G-Ground 15. DDC-Serial Clock

8. B-Ground

DESCRIPTION

15 - Pin Color Display Signal Cable

PIN NO.

15

6

11 15

DESCRIPTION

10

4.2 Factory Preset Display Modes

STANDARD

Dos-mode

VGA

SVGA

XGA

SXGA

WXGA 1440 × 900 55.935kHz 59.8Hz

RESOLUTION

720 × 400 31.47kHz 70Hz

640 × 480 31.47kHz 60Hz

640 × 480 37.50kHz 75Hz

800 × 600 37.879kHz 60Hz

800 × 600 46.875kHz 75Hz

1024 × 768 48.363kHz 60Hz

1024 × 768 56.476kHz 70Hz

1024 × 768 60.021kHz 75Hz

1280 × 1024 64.00kHz 60Hz

1280 × 1024 80.00kHz 75Hz

HORIZONTAL

FREQUENCY

VERTICAL

FREQUENCY

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19" LCD Color Monitor AOC 912Sw

5 Panel Specification

5.1 Display Characteristics

5.2 Optical Characteristics

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19" LCD Color Monitor AOC 912Sw

5.3 Parameter guide line for CCFL Inverter

TFT LCD Module:

Back Light Unit:

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19" LCD Color Monitor AOC 912Sw

6. Block Diagram

6.1 Software Flow Chat

1

2

N

4

5

Y

6

7

Y

N

N

3

18

9

10

Y

N

N

12

Y

14

19

N

11

13

15

17

N

Y

N

Y

16

Y

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19" LCD Color Monitor AOC 912Sw

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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19" LCD Color Monitor AOC 912Sw

(

(

)

6.2 Electric Block Diagram

6.2.1 Main Board

Crystal (14.318MHz)

(X401)

EEPROM

M24C16

(U403)

Scalar TSUM16AWK

(Include MCU, ADC, OSD)

(U401)

D-Sub

Connector

(CN405)

H sync
V sync

RGB

LCD interface

CN101)

EEPROM

M24C02

U404

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19" LCD Color Monitor AOC 912Sw

6.2.2 Inverter / Power Board

AC inlet Filter

Rectifier and
filter

Start circuit R904, R931, R938

Switching circuit
PWM control
IC&MOSFET

On/off control

Start circuit

PWM control IC

Transform

er

OVP/OCP circuit

Push-pull

circuit

Rectifier and
filter D908,
D909

To main board

Feedback
circuit IC902,
IC903

LC resonant

12V/5V

12V

Lamp

Dimming control

Feedback circuit

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19" LCD Color Monitor AOC 912Sw

7. Schematic

7.1 Main Board

TSUM16AWK SCHEMATIC

VCC3.3

XGA/SXGA

B3

+5V

+5V

GNDR

GNDG

SOG

GNDB

HSYNC

VSYN C
DDCA_SDA
DDCA_SCL

DET_VGA

DDC_WP

CLK+

CLK-

DDCD_SDA

DDCD_SCL

DET_DVI

RIN

GIN

BIN

R+

R-

G+

G­B+
B-

B4

RIN
GNDR
GIN
GNDG
SOG
BIN
GNDB
HSYNC
VSYN C
DDCA_SDA
DDCA_SCL
DET_VGA

DDC_WP
R+
R­G+
G­B+
B­CLK+
CLK­DDCD_SDA
DDCD_SCL
DET_DVI

LVDS OUTPUT

VCC3. 3

VCC1.8

VCC1.8

Vcc3. 3

+5V

+12V

+5V

+12V

3.INP UT

B5

PA[0.. 7]

PA[8.. 13]

PA[14..19]

+12V

+3V3

VCC1.8

+5V

B2

+12V

+3V3
VCC1.8
+5V

VCC3.3

on_BACKLIGHT

on_Panel

on_PANEL_12V

VCTRL

Adj_BACKLIGHT

VLCD

VLCD_12V

VLCD VLCD_12V

on_BACKLIGHT
on_Panel
on_PANEL_12V

VCTRL

Adj_BACKLIGHT

4.SCALER

PB[0.. 5]

PB[6.. 11]

PB[12..23]

GPO[0.. 4]

ESP

OSP

2.POW ER

PA[0.. 7]

PA[8.. 13]

PA[14.. 19]

PB[0.. 5]

PB[6.. 11]

PB[12.. 23]

GPO[0.. 4]

PA[0.. 7]

PA[8.. 13]

PA[14.. 19]

PB[0.. 5]

PB[6.. 11]

PB[12.. 23]

GPO[0.. 4]

ESP

OSP

VLCD_12V

VLCD

VLCD

VLCD_12V

5.PANEL INTERFACE

Tit le

Size Document Number Rev

B

Date: Sheet

715G1558-C-BJ.DSN

TOP

15Friday , July 21, 2006

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