AOC 917Sw Service Manual

19" LCD Color Monitor

AOC 917Sw

Service

Service

Service

Horizontal Frequency

30-83 KHz

TABLE OF CONTENTS

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 Buttons........................................................	6
3.3. OSD Menu….............................................................7
4. Input/Output Specification............………………..........9
4.1. Input Signal Connector............…………...................9
4.2. Power Supply Requirements....................................	9
4.3. Factory Preset Display Modes…….........................10
4.4. Panel Specification……………………………..…….10
5. Block Diagram…........................................................14
5.1. Software Flow Chart……………………………….....14

Description	Page
5.2.Electrical	Block Diagram…...............................16

6.Schematic……………..........................................18 6.1.Main Board……….............................................18 6.2.Power Board...……...........................................23 6.3.Key Board...……................................................25 7.PCB Layout...…………........................................26 7.1.Main Board………...........................................26 7.2.Power Board….................................................28 7.4.Key Board…………..........................................30

8.Maintainability………............................................31 8.1.Equipments and Tools Requirement...............31 8.2.Trouble Shooting….………................................32

9.White-Balance, Luminance adjustment................38

10.Monitor Exploded View…...................................40 11.BOM List…………………………………...............41 12.Different Parts List……...………………...............54

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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19" LCD Color Monitor

AOC 917Sw

Revision List

Version

Release Date

Revision History

TPV Model Name

T98SM5NBUWA1NN

T9RSM5NLUWCKNZ

T9RSM5NPUWA5NN

T9RSM5NPUWA5NG

A00

Feb.-17-2008

Initial release

T9RSM5NQUWA2NN

T9RSM5NQUWA3NN

T9RSM5NQUWA4NN

T9RSM5NKUWA2NN

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19" LCD Color Monitor

AOC 917Sw

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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19" LCD Color Monitor				AOC 917Sw
1. Monitor Specifications
		Model number		917Sw
		Driving system		TFT Color LCD
		Viewable Image Size		481mm diagoanl
	LCD Panel	Pixel pitch		0.2835mm(H) x 0.2835mm(V)
		Video		R, G, B Analog lnterface
		Separate Sync.		H/V TTL
		Display Color		16.7M Colors
		Dot Clock		128 MHz
		Horizontal scan range		30 kHz - 83 kHz
		Horizontal scan Size(Maximum)		408.24mm
		Vertical scan range		56 Hz - 75 Hz
		Vertical scan Size(Maximum)		255.15mm
		Optimal preset resolution		1440 x 900 (60 Hz)
	Resolution	Highest 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 Consumption		Active < 37W
				Standby < 1W
		Connector Type		15-pin Mini D-Sub
		Signal Cable Type		Detachable
		Dimensions & Weight:
	Physical
		Height (with base)		439 mm
	Characteristics
		Width		358 mm
		Depth		204 mm
		Weight (monitor only)		3.8 kg
		Weight (with packaging)		4.7 kg
		Temperature:
		Operating		0° to 50°
		Non-Operating		-20°to 60°
		Humidity:
	Environmental
		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 917Sw

2. LCD Monitor Description

The LCD monitor will contain a main board, a 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

	CCFL Drive.	Flat Panel and
		CCFL backlight

								RS232 Connector
Power board			Main Board
(Include: adapter, inverter)								For white balance
								adjustment in factory
								mode
			Key Board
								Video signal, DDC
AC-IN
					HOST Computer
100V-240V

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19" LCD Color Monitor

AOC 917Sw

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 of the 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

3.2.1 Key Control

1. Eco Mode / Up 2. Exit / - 3. Menu / + 4. Auto / Down 5. Power on/off

3.2.2 Key Function

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 sub-menu . Once the desired function is highlighted, press MENU-button to activate it.

3)Press or to change the settings of the selected function. Press or to select another function in sub-menu . Press AUTO() to exit . 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)Eco Mode hot key () : Press the Eco key continuously to select the Eco mode of brightness when there is no OSD ( Eco mode hot key may not be available in all models).

6)Volume adjustment hot key : When there is no OSD , press Volume () to active volume adjustment bar, press or to adjust volume ( Only for the models with speakers).

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19" LCD Color Monitor	AOC 917Sw
3.3 OSD Menu

	OSD Function Introduction
	Luminance	Adjust Range	Description
	Brightness	0-100	Backlight Adjustment
	Contrast	0-100	Contrast from Digital-register
		Standard	Standard Mode
		Text	Text Mode
	Eco mode	Internet	Internet Mode
		Game	Game Mode
		Movie	Movie Mode
		Sports	Sports Mode
		Gamma1	Adjust to Gamma 1
	Gamma	Gamma2	Adjust to Gamma 2
		Gamma3	Adjust to Gamma 3
	DCR	Off	Disable dynamic contrast ratio
		On	Enable dynamic contrast ratio
	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 horizonal position of the picture.
	V.Position	0-100	Adjust the vertical 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.

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19" LCD Color Monitor

AOC 917Sw

	sRGB		Recall SRGB Color Temperature from EEPROM.
		User-B	Blue Gain from Digital-register
		User-G	Green Gain Digital-register.
	User	User-R	Red Gain from Digital-register
		User-Y	Yellow Gain from Digital-register
		User-C	Cyan Gain from Digital-register
	Color Boost
	Full	on or off	Disable or Enable Full Enhance Mode
	Enhance
	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
	OSD Setup
	H.Position	0-100	Adjust the horizontalposition of OSD
	V.Position	0-100	Adjust the vertical 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
	Reset	yes or no	Reset the menu to default
	DDC-CI		Turn ON/OFF DDC-CI Support
	Information		Show the information of the main image and
			sub-image source

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19" LCD Color Monitor

AOC 917Sw

4. Input/Output Specification

4.1 Input Signal Connector

Analog connectors

Pin No.	Description	Pin No.	Description
1.	Red Video	9.	+5V
2.	Green Video	10.	Ground
3.	Blue Video	11.	N.C.
4.	N.C.	12.	DDC-Serial Data
5.	Detect Cable	13.	H-Sync
6.	Red Ground	14.	V-Sync
7.	Green Ground	15.	DDC-Serial Clock
8.	Blue Ground

VGA connector layout

1	5
6	10
11	15

4.2 Power Supply Requirements

	A/C Line voltage range	100 V ~ 240 V
	A/C Line frequency range	50 ± 3Hz, 60 ± 3Hz
	Current	1.5A max at 100V; 0.8A max at 240 V
	Peak surge current	< 55A peak at 240 VAC and cold starting
	Leakage current	< 3.5mA
	Power line surge	No advance effects (no loss of information or defect)
		with a maximum of 1 half-wave missing per second
	DC output Voltage	: 5VDC ± 5 ; 12VDC± 5
	CURRENT	1.5Amp (5V) 2 Amp (12V)

\

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19" LCD Color Monitor							AOC 917Sw
4.3 Factory Preset Display Modes
	Stand		Resolution			Horizontal	Vertical
						Frequency(Khz)	Frequency(Hz)
	Dos-mode		720 × 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
	WXGA		1440 × 900			55.935kHz	59.8Hz

4.4 Panel Specification

4.4.1 General Features

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19" LCD Color Monitor

AOC 917Sw

4.4.2 Display Characteristics

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19" LCD Color Monitor

AOC 917Sw

4.4.3 Optical Characteristics

12

19" LCD Color Monitor

AOC 917Sw

4.4.4Electrical Characteristics

(1)TFT-LCD

(2) Backlight

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19" LCD Color Monitor

5. Block Diagram

5.1 Software Flow Chat

1

2

N

4

5

Y

6

7

Y

9

AOC 917Sw

Y

3

N

N

8

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

N

18 19

Y

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19" LCD Color Monitor

AOC 917Sw

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 917Sw
5.2 Electrical Block Diagram
5.2.1 Main Board

Crystal 14.318MHZ		Panel Interface
(X401)		(CN403)

		Scalar TSUM1PFR
FLASH ROM
		(Include ADC, OSD, MCU)		Key Control Interface
SST25LF020A
				(CN402)
(U402)
		(U401)

D-Sub Connector

(CN101)

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19" LCD Color Monitor

AOC 917Sw

5.2.2 Inverter/Power Board

AC input

Bridge

Rectifier

Transformer

EMI filter

Rectifier

diodes

and Filter

Start Circuit: R932, R933

CN902

5V

Feedback

PWM

Circuit

Control IC

12V

ON/OFF

Output

Transformer

MOSFET

Circuit

Lamp

ON/OFF

Feedback

PWM

Control

Circuit

Control IC

DIM

Over Voltage

IC801

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19" LCD Color Monitor

AOC 917Sw

6. Schematic

6.1Main Board

715G2904 1

TSUM1PFR

SCHEMATIC

XGA/SXGA

LVDS OUTPUT

DSUB_R+

DSUB_R+

VCC1.8

DSUB_R-

DSUB_R-

DSUB_G+

DSUB_G+

VCC3.3

DSUB_G-

DSUB_G-

VCC1.8

DSUB_SOG

DSUB_SOG

CMVCC

DSUB_5V

DSUB_B+

DSUB_B+

DSUB_B-

DSUB_B-

VCC3.3

CMVCC1

ESD_VCC

DSUB_H

DSUB_H

DSUB_V

DSUB_V

VCC3.3

DSUB_5V DDC1_SDA

DDC1_SDA

CMVCC

DDC1_SCL

DDC1_SCL

ESD_VCC DET_CABLE

DET_CABLE

CMVCC1

VCC3.3

02.Input

VCC1.8

CMVCC

VCC3.3

PA[0..1]

PA[0..1]

PA[0..1]

DSUB_5V

VCC1.8

PA[4..9]

CMVCC

on_BACKLIGHT

on_BACKLIGHT

PA[4..9]

PA[4..9]

PB[0..9]

CMVCC

VCC3.3

PB[0..9]

PB[0..9]

Mute

Mute

Volume#

Volume#

PPWR_ON#

PPWR_ON#

CMVCC1

DSUB_5V PANEL_ID#

PANEL_ID#

Adj_BACKLIGHT

Adj_BACKLIGHT

CMVCC

ESD_VCC

VCTRL

VCTRL

CMVCC1

ESD_VCC

05.Power

03.Scalar

04.Output

T P V ( Top Victory

Electronics Co . , Ltd. )

OEM MODEL

Size

A

TPV MODEL

Rev

1

Key Component

01.Top

PCB NAME

715G2904-1

< >

Date

Friday , February 29, 2008

Sheet

3 of 7

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