AOC 177S Diagram

17" LCD Color Monitor AOC 177S

Service

Horizontal Frequency

30-80 kHz

TABLE OF CONTENTS

Description Page Description Page

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

4.3.Panel Specification.....…………...………..................10

5.Block Diagram…….…...................…………................12

5.1.Software Flow Chart…………………....….......12

5.2.Electrical Block Diagram…………..…..….......14

6.Schematic……………...............................….....16

6.1 Main Board……………..........................................16

6.2 Power Board....……..............................................21

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

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

7.2.Power Board….......................................26

7.3.Key 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……………………............37

11.BOM List….....................................................38

12.Different Parts List……………………………………50

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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17" LCD Color Monitor AOC 177S

Revision List

Revision Date Revision History TPV Model

A00 April-19-2007 First Version Release T76CM5NQF1ACF

A01 May-18-2007 Add the audio function T76CM5DCF1A2A

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17" LCD Color Monitor AOC 177S

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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17" LCD Color Monitor AOC 177S

1. Monitor Specifications

Items Description

Driving system TFT Color LCD

Type CLAA170EA07P

Size 43.2cm (17.0")

Pixel pitch 0.264mm (H) x 0.264mm (V)

LCD Panel

Input

Power Consumption

Viewable angle(CR≥10)

Response time (type) 5 ms

Display Color 16.2M

Contrast Ratio 700:1

White Luminance 300cd/m

Sync. Type H/V TTL

Input Connector D-Sub 15pin

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

H-Frequency 30kHz – 80kHz

V-Frequency 55-75Hz

ON Mode ≤37W

OFF Mode

160°(H) 160°(V)

2

≤1W

Dot Clock 135MHz

Max. Resolution 1280 x 1024

Plug & Play VESA DDC2BTM

Power Source 100~240VAC,47~63Hz

Maximum Screen Size

Dimensions 384 mm (H) x375.5 mm (W) x209.6 mm (D)

Weight Monitor only: 3.7 kg

Environmental

Considerations

Horizontal : 338mm

Vertical: 270mm

Operating Temp: 5°C to 35°C

Storage Temp: -20°C to 60°C

Operating Humidity: 10% to 85%

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17" LCD Color Monitor AOC 177S

(

2. LCD Monitor Description

The LCD monitor will contain a main board, 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

Power board

Include: adapter, inverter)

AC-IN

100V-240V

CCFL Drive.

Flat Panel and

CCFL backlight

Main Board

Key board

HOST Computer

RS232 Connector

For white balance

adjustment in factory

mode

Video signal, DDC

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17" LCD Color Monitor AOC 177S

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 Button

External Controls

1. Contrast 2. Brightness

3. Power Button/ LED 4. MENU / ENTER

5. Auto Adjust button / Exit

• Power Button:

Press this button to turn the monitor ON or OFF.

• Power Indicator:

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 Brightness /Contrast Adjust OSD status.

• Brightness:

Adjust brightness or functions adjust.

• Contrast:

Adjust contrast or functions adjust.

• Auto Adjust button / 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.

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17" LCD Color Monitor AOC 177S

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 2-4.

OSD TABLE:

Main Menu Item

Luminance

Image Setup

Image Position

Color Temp.

Main Menu

Icon

Sub Menu

Sub Menu Item

Contrast

Brightness

Focus

Clock

H. Position

V. Position

Warm N/A

Icon

Description

Adjust Picture Phase to reduce Horizontal-Line

Adjust picture Clock to reduce Vertical-Line

Adjust the horizontal position of the picture.

Contrast from Digital-register.

Backlight Adjustment

noise

noise.

Adjust the vertical position of the picture.

Recall Warm Color Temperature from

EEPROM.

Cool N/A Recall Cool Color Temperature from EEPROM.

sRGB N/A

7

Recall sRGB Color Temperature from

EEPROM.

17" LCD Color Monitor AOC 177S

User / Blue

Input Select

OSD Setup

User / Red

User / Green

Yes

N/A

No N/A

H. Position

V. Position

OSD Timeout

Red Gain from Digital-register.

Green Gain Digital-register.

Blue Gain from Digital-register.

Auto Adjust the H/V Position, Focus and Clock

of picture.

Do not execute Auto Config, return to main

menu.

Adjust the horizontal position of the OSD.

Adjust the vertical position of the OSD.

Adjust the OSD timeout.

Language

Information

Reset

Exit

Language N/A Set OSD display language that you like..

Show the resolution, H/V frequency and input

Information N/A

port of current input timing.

Clear each old status of Auto-configuration and

Yes N /A

set the color temperature to Cool.

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

N/A N/A Exit OSD

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17" LCD Color Monitor AOC 177S

4. Input/Output Specification

4.1 Input Signal Connector

Pin No. Description Pin No. Description

1. Red Video 9. +5V

2. Green Video 10. Detect Cable

3. Blue Video 11. TXD

4. RXD 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

VGA connector layout

4.2 Factory Preset Display Modes

Standard

Dos-mode 720 x 400 31.47kHz 70.0Hz

VGA

SVGA

XGA

640 × 480 31.47kHz 60.0Hz

640 × 480 37.50kHz 75.0Hz

800 × 600 37.879kHz 60.0Hz

800 × 600 46.875kHz 75.0Hz

1024 × 768 48.363kHz 60.0Hz

1024 × 768 56.476kHz 70.0Hz

1024 × 768 60.021kHz 75.0Hz

15

6

11 15

10

Horizontal

Resolution

Frequency

Vertical

Frequency

SXGA

1280 × 1024 64.000kHz 60.0Hz

1280 × 1024 80.000kHz 75.0Hz

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17" LCD Color Monitor AOC 177S

4.3 Panel Specification

4.3.1 Display Characteristics

4.3.2 Optical Characteristics

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17" LCD Color Monitor AOC 177S

4.3.3 Electrical Characteristics

TFT LCD Module:

Back Light Unit:

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17" LCD Color Monitor AOC 177S

5. Block Diagram

5.1 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 177S

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 177S

5.2 Electric Block Diagram

5.2.1 Main Board

Crystal (14.318MHz)

(X401)

LCD interface

(CN101)

EEPROM

PM25LV512

(U402)

Scalar TSUM16AK

(Include MCU, ADC, OSD)

(U401)

H sync

V sync

RGB

D-Sub

Connector

(CN405)

EEPROM

M24C02-WMN6TP

(U404)

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17" LCD Color Monitor AOC 177S

5.2.2 Power Board

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17" LCD Color Monitor AOC 177S

6. Schematic

6.1 Main Board

TSUM56AK SCHEMATIC

B3

+5V

GNDR

GNDG

GNDB

HSYNC

VSYN C DDCA_SDA DDCA_SCL

DET_VGA

DDC_WP

CLK+

DDCD_SDA

DDCD_SCL

DET_DVI

RIN

GIN

SOG BIN

CLK-

R+ RG+ G-

B+

B-

XGA/SXGA

B4

RIN GNDR GIN GNDG SOG

BIN

GNDB HSYNC VSYN C DDCA_SDA DDCA_SCL DET_VGA

DDC_WP R+ RG+ GB+ B-

CLK+

CLKDDCD_SDA DDCD_SCL DET_DVI

3.INPUT

LVDS OUTPUT

VCC3.3

VCC1.8 +5 V

VCC1.8

Vcc3.3

+5V

+12V

VCC3.3

VCC5V

B5

PA[0.. 7]

PA[8.. 13]

PA[14.. 19]

+12V

PC5V

+3V3

VCC1.8

+5V

B2

+12V

+3V3

VCC1.8 +5V VCC5V VCC3.3

on_BACKLIGH T

on_Panel

on_PANEL_12V

VCTRLPC5V

Adj_BACKLIGH T

VLCD

VLCD_12V

VLCD

VLCD_12V

on_BACKLIGH T

on_Panel

on_PANEL_12V

VCTRL

Adj_BACKLIGH T

4.SCALER

PB[0.. 5]

PB[6.. 11]

PB[12.. 23]

GPO[0.. 4]

ESP

OSP

PA[0.. 7]

PA[8.. 13]

PA[14.. 19]

PB[0.. 5]

PB[6.. 11]

PB[12.. 23]

GPO[0.. 4]

2.POW ER

PA[0.. 7]

PA[8.. 13]

PA[14.. 19]

PB[0.. 5]

PB[6.. 11]

PB[12.. 23]

GPO[0.. 4]

ESP

OSP

VLCD

VLCD_12V

VLCD

VLCD_12V

5.PANEL INTERFACE

Tit le

Size Document Num ber Rev

B

Date: Sheet

715G1558.DSN

TOP

of

26Saturday , Nov ember 12, 2005

B

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