SONY 6805 Service Manual

17" LCD

AOC 712Si

Service

Service

Service

Horizontal Frequency

3080 kHz

Table Of Contents

Description Page

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

Important Safety Notice.………….…..................……......2

Revision List.…........................………................……......3

1.Product Feature..............................………........4

2.LCD Monitor Description…………………………….......6

3.Operation Instruction…………...............……...........7

3.1.General Instructions...........................…...........7

3.2.Control Buttons…………….…..............……...............7

3.3 Adjusting the Picture...........................…............8

4.Input/Output Specification............……………...........10

4.1.Analog Connector............…………........……….......10

4.2.Factory Preset Display Modes...............…..........10

5.Panel Specification.....………………..................11

5.1. General Feature…….....………………..................11

5.2. Optical Characteristics………………………………11

5.3. Electrical Characteristics……………………………12 6.Block Diagram…….…................…………................13

Description	Page
6.1.Monitor Exploded View……………………............13
6.2.Software Flow Chart…………………....….......14
6.3.Electrical Block Diagram…………..…..….......16
7.Schematic……………...............................….....17
7.1 Main Board.............................................	17
7.2 Power Board....……...........……........................27
8.PCB Layout..…………...........……...........................29
8.1.Main Board………..................……....................29
8.2.Power Board…....................……………..................30
8.3.Key Board………........…................………............32
9.Maintainability………............................……….........33
9.1.Equipments and Tools Requirement......……….......33
9.2.Trouble Shooting…………..............................34
10.White-Balance, Luminance adjustment....................	42
11.BOM List….................……......................….............43
12.Different Parts List………………………...…………..58

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 712Si

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 might 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 712Si

Revision List

	Revision	Date	Revision History	TPV Model
	A00	Apr.-21-2007	First Version Release	T77CNNNKHAA1FIE
				T77CNNMDHAA4NIE

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17" LCD Color Monitor				AOC 712Si
1. Product Feature
			Driving system	TFT Color LCD
LCD Panel			Size	43.2cm(17.0")
			Pixel pitch	0.264mm( H ) × 0.264mm( V )
			Video	R,G,B Analog Interface
Input			Separate Sync.	H/V TTL
			H-Frequency	30kHz – 80kHz
			V-Frequency	55-75Hz
Display Colors				16.2M Colors
Dot Clock				135MHz
Max. Resolution				1280 × 1024 @75Hz
Plug & Play				VESA DDC2BTM
EPA ENERGY STAR®			ON Mode	≤37W
			OFF Mode	≤1W
		Input Connector	15-pin D-Sub
	Input Video Signal		Analog:0.7Vp-p(standard),
			75 OHM, Positive
Maximum Screen Size			Horizontal : 338mm
			Vertical : 270mm
		Power Source	100~240VAC,47~63Hz
		Environmental	Operating Temp: 5° to 35°C
		Considerations	Storage Temp.: -20° to 60°C
			Operating Humidity: 10% to 85%
		Dimension	399(H)×433(W)×133(D)mm
		Weight (N. W.)	4.25kg Unit (net)
		Switch	Auto Adjust Key
			Brightness
			Contrast
			Power Button
			MENU
External		Functions	Contrast
Controls:			Brightness
			Focus
			Clock
			H. Position
			V. Position
			Auto Config
			Language
			Information
			OSD Setup

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17" LCD Color Monitor		AOC 712Si
		(Warm)Color
		(Cool)Color
		User Color temperature
		sRGB
		Reset
		Exit
Regulatory Compliance		CE, FCC, cULus, TUV-S

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17" LCD Color Monitor

AOC 712Si

2. LCD Monitor Description

The LCD MONITOR will contain a main board, a power board, a key board and an audio board which house the flat panel control logic, brightness control logic and DDC.

The power board will provide AC to DC voltage to drive the backlight of panel and the main board chips each voltage.

Monitor Block Diagram

CCFL Drive.

Flat Panel and

CCFL backlight

RS232 Connector

Power Board

Main Board

For white balance

(Include Adapter and Inverter)

adjustment in factory

mode

Audio Board

Key Board

Video signal, DDC

OK

HOST Computer

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17" LCD Color Monitor

AOC 712Si

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 the 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.

3.2Control Buttons

1 2 3 4 5

1.	Auto Adjust button / Exit	2.	/ Brightness
3.	Power Button/ LED	4.	/ Contrast
5.	MENU / ENTER

•Power Button:

Press this button to turn the monitor ON or OFF.

•Power Indicator:

Blue — 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 function adjust.

•Contrast :

Adjust contrast or function 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 712Si

3.3 Adjusting The Pictures

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.

The table below describes the function of each OSD icon.

Main		Main		Sub		Sub Menu
Menu	Menu Icon			Menu		Icon
Item				Item
Luminance				Contrast
				Brightness
Image Setup				Focus
				Clock
Image Position				H. Position
				V. Position
Color Temp.				Warm			N/A
				Cool			N/A
				sRGB			N/A
				User / Red

Description

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 verticalposition of the picture.

Recall Warm Color Temperature from EEPROM. Recall Cool Color Temperature from EEPROM. Recall sRGB Temperature from EEPROM.

Red Gain from Digital-register.

User / Green			Green Gain Digital-register.
User / Blue			Blue Gain from Digital-register.

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17" LCD Color Monitor

Auto Config				Yes		N/A
				No		N/A
OSD Setup				H. Position
				V. Position
				OSD Timeout
Language				Language		N/A
Information				Information		N/A
Reset				Yes		N/A
				No		N/A
Exit				N/A		N/A

AOC 712Si

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 verticalposition of the OSD.

Adjust the OSD timeout.

Set OSD language

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

Clear each old status of Auto-configuration. Do not execute reset, return to main menu. Exit OSD

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17" LCD Color Monitor			AOC 712Si
4. Input/Output Specification
4.1 D-SUB connector
Pin No.	Description	Pin No.	Description
1.	Red	9.	+5V
2.	Green	10.	Detect Cable
3.	Blue	11.	TXD
4.	RXD	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
	VGA Connector layout
	1	5
	6	10
	11	15

4.2 Factory Preset Display Modes

	STANDARD			HORIZONTAL	VERTICAL
		RESOLUTION		FREQUENCY	FREQUENCY
	Dos-mode	720 x 400		31.47kHz	70.0Hz
	VGA	640 × 480		31.47kHz	60.0Hz
		640 × 480		37.50kHz	75.0Hz
	SVGA	800	× 600	37.879kHz	60.0Hz
		800	× 600	46.875kHz	75.0Hz
		1024 × 768		48.363kHz	60.0Hz
	XGA	1024 × 768		56.476kHz	70.0Hz
		1024 × 768		60.021kHz	75.0Hz
	SXGA	1280	× 1024	64.000kHz	60.0Hz
		1280	× 1024	80.000kHz	75.0Hz

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17" LCD Color Monitor	AOC 712Si
5. Panel Specification
5.1 General Characteristics

5.2 Optical Characteristics

The optical characteristics are measured under stable conditions at 25±2 (Room Temperature)

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17" LCD Color Monitor

AOC 712Si

5.3 Electrical Characteristics

TFT LCD MODULE

BACKLIGHT UNIT

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17" LCD Color Monitor

AOC 712Si

6. Block Diagram

6.1 Monitor Exploded View

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17" LCD Color Monitor

AOC 712Si

6.2 Software Flow Chart

1

2	Y	3

N

4

5	N
Y
6

7

N

8

Y

9

	10	N	11
	Y
N	12		13	N
	Y		Y
	14		15	N	16
			Y
			17

18	N	19

Y

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17" LCD Color Monitor

AOC 712Si

1)MCU initializes.

2)Is the EEPROM blank?

3)Program the EEPROM by default values.

4)Get the PWM value of brightness from EEPROM.

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 EEPROM. Turn on the LED and set it to green color. Scaler 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?

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17" LCD Color Monitor

AOC 712Si

6.3 Electrical Block Diagram

6.3.1 Main Board

6.3.2 Inverter/Power Board

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17" LCD Color Monitor

AOC 712Si

7. Schematic

7.1 Main Board

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17" LCD Color Monitor

AOC 712Si

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