AOC 197p Schematic

19" LCD Color Monitor

AOC 197P+

Service

Service

Service

Horizontal Frequency 30-83 kHz

TABLE OF CONTENTS

Description Page

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

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

1. Monitor Specification.................................………........3 2.LCD Monitor Description…………………………….......4

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

Description

Page

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

6.2Electrical Block Diagram………...………...…......12 7. Schematic……………………………………………. 15

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

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

3.1General Instructions.....................................…...........5 8. PCB Layout..………….......................................22

3.2Control Button……………………………..……...........5 8.1 Main Board……………......................................22

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

4. Input/Output Specification............……………............7

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

8.3Key Board……………….....................................28

4.1Input Signal Connector............…..……................7 8.4 Audio Board………………………………………….28

4.2Factory Preset Display Modes.........................8 9. Maintainability……….......................................29

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

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

9.1. Equipments and Tools Requirement	.....................29
9.2. Trouble Shooting…………....................................30

5.1Display Characteristics………………………………9 10. White-Balance, Luminance adjustment.................35

5.2Optical Characteristics………………………………..9 11.Monitor Exploded View……..……………............36

5.3 Parameter guide line for CCFL Inverter……………..10 12. BOM List....……....................................................37

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

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19" LCD Color Monitor

AOC 197P+

Revision List

Revision	Date	Revision History	TPV Model
A00	Apr.-23-2007	Initial release	T97HM8HLF1MGAE

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19" LCD Color Monitor							AOC 197P+
1. Monitor Specifications
			Model number			197P+
			Driving system			TFT Color LCD
			Size			48cm(19.0" )
	LCD Panel		Pixel pitch			0.294mm(H) x 0.294mm(V)
			Video			R, G, B Analog interface & Digital Interface
			Separate Sync.			H/V TTL & TMDS
			Display Color			16.2million Colors
			Dot Clock			135MHz
			Horizontal scan range			30 kHz - 83 kHz
			Horizontal scan Size(Maximum)			376.32mm
			Vertical scan range			55 Hz - 75 Hz
			Vertical scan Size(Maximum)			301.056mm
			Optimal preset resolution			1280 x 1024 (60 Hz)
	Resolution		Highest preset resolution			1280 x 1024 (75 Hz)
			Highest addressable resolution			1280 x 1024 (75 Hz)
			Plug & Play			VESA DDC2B
			Input Connector			D-Sub 15pin & DVI-D
						Analog: 0.7Vp-p(standard), 75 OHM, Positive & DVI-D Digital
			Input Video Signal			Interface (TMDS)
			Power Source			100~240VAC, 47~63Hz
			Connector Type			15-pin Mini D-Sub & DVI-D
			Signal Cable Type			Detachable
			Dimensions & Weight:
	Physical		Height (with base)			415(mm)
	Characteristics		Width			413(mm)
			Depth			256(mm)
			Weight (monitor only)			6.0(Kg)
			Weight (with packaging)			7.5(Kg)
			Temperature:
			Operating			0°C- +50°C
			Non-Operating			-20°C- 60°C
			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)
	Regulations		CCC,cULus,FCC,CE,MPRII,RoHS

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19" LCD Color Monitor

AOC 197P+

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.

Monitor Block

	CCFL Drive.	Flat Panel and
		CCFL backlight

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

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19" LCD Color Monitor

AOC 197P+

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.

3.2Control Buttons

1	Power Button & Indicator	4	- / Brightness
2	Menu / Enter	5	Auto config / Exit
3	+ / Contrast

/Power Button & Indicator:

Press this button to turn the monitor ON or OFF, And display the monitor’s state.

-Power Indicator:

-Green — Full Power Mode

-Orange — Active-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:

Activates the volume control when the OSD is OFF or navigate through adjustment icons when OSD is ON or adjust a function when function is activated.

-- / Brightness:

Activates the volume 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.

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19" LCD Color Monitor

AOC 197P+

3.3 Adjusting the Picture

·Press the MENU-button to activate the OSD window.

·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.

·Press+ or - to change the settings of the selected function. To exit and save, select the exit function. If you want to adjust any other function, repeat steps 2-3.

·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.

Main Menu		Main Menu	Sub Menu	Sub Menu	Description
Item		Icon	Item	Icon
Luminance			Contrast		Contrast from Digital-register.
			Brightness		Backlight Adjustment
Image Setup			Focus		Adjust Picture Phase to reduce Horizontal-Line noise
			Clock		Adjust picture Clock to reduce Vertical-Line noise.
Image			H. Position		Adjust the horizontal position of the picture.
Position			V. Position		Adjust the vertical position of the picture.
			Warm	N/A	Recall Warm Color Temperature from EEPROM.
			Cool	N/A	Recall Cool Color Temperature from EEPROM.
Color Temp.			sRGB	N/A	Recall sRGB Temperature from EEPROM.
			User / Red		Red Gain from Digital-register.
			User / Green		Green Gain Digital-register.
			User / Blue		Blue Gain from Digital-register.
Auto			Yes	N/A	Auto adjusting H/V position, focus, phase.
Adjustment			No	N/A	Back to main OSD.
			H. Position		Adjust the horizontal position of the OSD.
OSD Setup
			V. Position		Adjust the vertical position of the OSD.
			OSD Timeout		Adjust the OSD timeout.
Language			Language	N/A	Set OSD language.
Information			Information	N/A	Show the resolution, H/V frequency and input port of current
					input timing.
Reset			Yes	N/A	Clear each old status of Auto-configuration .
			No	N/A	Do not execute reset, return to main menu.
Exit			N/A	N/A	Exit OSD

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19" LCD Color Monitor

AOC 197P+

4. Input/Output Specification

4.1Input Signal Connector

4.1.1D-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
	1	5
	6	10
	11	15

4.1.2 DVI-D connector

Pin No.	Signal Name	Pin No.	Signal Name
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 -

24 - Pin Color Display Signal Cable

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19" LCD Color Monitor								AOC 197P+
4.2 Factory Preset Display					Modes
		Standard			Resolution		Horizontal	Vertical
							Frequency (kHz)	Frequency (Hz)
		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

4.3 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 197P+

5 Panel Specification

5.1 Display Characteristics

5.2 Optical Characteristics

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19" LCD Color Monitor

AOC 197P+

5.3 Parameter guide line for CCFL Inverter 1.TFT LCD Module:

2.Back Light Unit:

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19" LCD Color Monitor

AOC 197P+

6. Block Diagram

6.1 Software Flow Chat

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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19" LCD Color Monitor

AOC 197P+

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 197P+

6.2 Electric Block Diagram

6.2.1 Main Board

LCD Interface

(CN101)

FLASH MEMORY		Scalar TSUMO56J
PM25LV512		(Include: MCU, ADC, OSD etc)
(U402)		(U401)

H sync			RGB
V sync			DCLK+
RGB			DCLK-
		EEPROM
		24LC16B
		(U403)
D-Sub				DVID
Connector				Connector
(CN405)				(CN406)

		EEPROM
EEPROM
M24C02		M24C02
(U404)		(U405)

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19" LCD Color Monitor

AOC 197P+

6.2.2 Inverter / Power Board

Bridge

Rectifier

AC input

Transformer

EMI filter

Rectifier

diode

and Filter

Start Circuit: R905 R906

R907 R908 R909 R910

5V

12V

PWM

Over

Control IC

Voltage

Protect

ON/OFF

OSC and

DC Convert

MOSFET

Output

Circuit

Lamp

Circuit

PWM

Feedback

Over Voltage

PWM

ON/OFF Control

Circuit

Protect

Control IC

DIM

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19" LCD Color Monitor

AOC 197P+

7. Schematic

7.1 Main Board

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