AOC 177VK Diagram

17" LCD Color Monitor AOC 177Vk

Service

Horizontal Frequency

30-80kHz

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............……………............7

4.1 Input Signal Connector............…..……................7

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

4.3 Power Supply Requirements…………………………8

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

5.1 Display Characteristics………………………………9

5.2 Optical Characteristics………………………………..9

5.3 Parameter guide line for CCFL Inverter……………..10

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

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

6.1 Software Flow Chat…….…..........………….........11

6.2 Electrical Block Diagram………...………...…......12

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……………….....................................28

8.4 Audio Board………………………………………….28

9. Maintainability……….......................................29

9.1. Equipments and Tools Requirement.....................29

9.2. Trouble Shooting…………....................................30

10. White-Balance, Luminance adjustment.................35

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

12. BOM List....……....................................................37

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17" LCD Color Monitor AOC 177Vk

Revision List

Revision Date Revision History TPV Model

A00 Jan.-17-2008 Initial release T77SRTDBF1ACANE

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17" LCD Color Monitor AOC 177Vk

1. Monitor Specifications

General

LCD Panel(17")

Resolution

Physical Characteristics

Environmental

Regulations

Model number 177Vk Driving system TFT Color LCD Viewable Image Size: 432mm diagonal Pixel pitch 0.264mm(H) x 0.264mm(V) Video R, G, B Analog interface Video Digital Interface (only Dual-Input Model) Separate Sync. H/V TTL Separate Sync. TMDS (only Dual-Input Model) Display Color 16.2million Colors Dot Clock 135MHz Horizontal scan range 30 kHz to 80 kHz

Horizontal scan Size(Maximum)

Vertical scan range 55 Hz to 75 Hz Vertical scan Size(Maximum) 270.34mm Optimal preset resolution 1280 x 1024 at 60 Hz Highest preset resolution 1280 x 1024 at 75 Hz Highest addressable resolution 1280 x 1024 at 75 Hz Plug & Play VESA DDC2B Input Connector D-Sub 15pin Input Connector DVI-D (only Dual-Input Model) Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM, Positive

Input Video Signal Power Source 100~240VAC, 47~63Hz Connector Type 15-pin Mini D-Sub Signal Cable Type Detachable Connector Type 24 pin DVI-D (only Dual-Input Model) Dimensions & Weight:

Height (with base) 383.89 mm Width 375.45 mm

Depth 209.60 mm Weight (monitor only) 3.7 kg Weight (with packaging) 5.5 kg Temperature:

Operating +5° to +35°

Non-Operating -20° to 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)

cULus, FCC, TÜV/GS, CE, ISO13406-2, TCO'03, Windows® XP

337.92mm

DVI-D Digital Interface (TMDS) (only Dual-Input Model)

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17" LCD Color Monitor AOC 177Vk

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.

PWPC board (Include: adapter, inverter)

AC-IN 100V-240V

Monitor Block

CCFL Drive.

Main Board

Keyboard

Flat Panel and CCFL backlight

HOST Computer

RS232 Connector For white balance adjustment in factory mode

Video signal DDC

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17" LCD Color Monitor AOC 177Vk

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.

-

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/Power Indicator 4 Menu / Enter 2 Volume Control 5 Auto Config / Exit 3 Volume Control

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.

4. To exit and save, select the exit function. If you want to adjust any other function, repeat steps 2-3.

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17" LCD Color Monitor AOC 177Vk

Main Menu Item

Main

Menu

Icon

Sub Menu Item

Sub

Menu

Icon

Description

Luminance

Image Setup

Image Position

Color Temp.

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 Temperature from EEPROM.

User / Red

User / Green

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.

Auto Config

(only Analog-input Model)

Input Select

(only Dual-Input Model)

OSD Setup

Language

Information

Reset

User / Blue

Yes N/A

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

Analog N/A Select input signal from analog source (D-Sub)

Digital N/A Select input signal from digital source (DVI)

H. Position

V. Position

OSD Timeout

Language N/A Select the language you like.

Information N/A

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

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

Blue Gain from Digital-register.

Auto Adjust the H/V Position, Focus and Clock of picture.

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.

Exit

N/A N/A Exit OSD

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17" LCD Color Monitor AOC 177Vk

4. Input/Output Specification

4.1 Input Signal Connector

4.1.1 D-SUB connector

PIN NO. DESCRIPTION PI N NO. DESCRIPTION

1 Video-Red 9 +5V

2 Video-Green 10 Detect Cable

3 Video-Blue 11 Ground

4 GND 12 DDC-Serial data

5 DDC-Return 13 H-sync

6 GND-R 14 V-sync

7 GND-G 15 DDC-Serial clock

8 GND-B

VGA connector layout

15

6

11 15

10

4.1.2 DVI-D connector

Pin No.

1 TMDS Data 2- 13 TMDS Data 3+

2 TMDS Data 2+ 14 +5V Power

3 TMDS Data 2/4 Shield 15 Ground(for+5V)

4 TMDS Data 4- 16 Hot Plug Detect

5 TMDS Data 4+ 17 TMDS Data 0-

6 DDC Clock 18 TMDS Data 0+

7 DDC Data 19 TMDS Data 0/5 Shield

8 N.C. 20 TMDS Data 5-

9 TMDS Data 1- 21 TMDS Data 5+

10 TMDS Data 1+ 22 TMDS Clock Shield

11 TMDS Data 1/3 Shield 23 TMDS Clock +

12 TMDS Data 3- 24 TMDS Clock -

Signal Name

24 - Pin Color Display Signal Cable

Pin No.

Signal Name

7

17" LCD Color Monitor AOC 177Vk

4.2 Factory Preset Display Modes

Standard Resolution

Dos-mode 720 x 400 31.47 70

VGA 640 x 480 31.47 60

VGA 640 x 480 37.5 75

SVGA 800 x 600 37.879 60

SVGA 800 x 600 46.875 75

XGA 1024 x 768 48.363 60

XGA 1024 x 768 56.476 70

XGA 1024 x 768 60.02 75

XGA 1024 x 768 48.78 60

XGA 1024 x 768 60.241 75

SXGA 1280 x 1024 64 60

SXGA 1280 x 1024 80 75

Horizontal

Frequency (kHz)

Vertical

Frequency (Hz)

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17" LCD Color Monitor AOC 177Vk

5 Panel Specification

5.1 Display Characteristics

5.2 Optical Characteristics

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17" LCD Color Monitor AOC 177Vk

5.3 Parameter guide line for CCFL Inverter

1. TFT LCD Module:

2. Back Light Unit:

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17" LCD Color Monitor AOC 177Vk

6. Block Diagram

6.1 Software Flow Chat

1

2

N

4

5

Y

6

7

Y

N

3

18

9

10

Y

N

12

Y

14

19

N

11

13

15

17

N

Y

N

Y

16

Y

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17" LCD Color Monitor AOC 177Vk

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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17" LCD Color Monitor AOC 177Vk

6.2 Electric Block Diagram

6.2.1 Main Board

Crystal

24MHZ

(X301)

MCU

RTD2120L-LFLQFP48

(U402)

OSD

Control Interface

(KEYPAD)

D-Sub

Connector

(CN702)

H sync V sync

RGB

Panel Interface

(CN101)

Scalar IC RTD2525L-LF

(Include ADC, OSD)

(U401-1)

EEPROM

M24C16

(U302)

DCLK+

DCLK-

RGB

Connector

DVID

(CN701)

EEPROM

M24C02

(U702)

EEPROM

M24C02

(U701)

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17" LCD Color Monitor AOC 177Vk

6.2.2 Inverter / Power Board

AC input

Lamp

EMI filter

Start Circuit: R905、R906、 R907、R908、R909、R910

OSC and Output Circuit

Feedback Circuit

Bridge Rectifier and Filter

PWM Control IC

DC Convert Circuit

Over Voltage Protect

Transformer

PWM Control IC

Rectifier diode

MOSFET

PWM

Over Voltage Protect

12V

ON/OFF

ON/OFF Control

DIM

CN902

5V

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17" LCD Color Monitor AOC 177Vk

7. Schematic

7.1 Main Board

15