AOC VS17T Service Manual

HP VS17T

SERVICE MANUAL

17” LCD Monitor

VS17T

THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.

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		HP VS17T
	Table of Content
Revision List ----------------------------------------------------------------------------------------------------------------------------		03
1.Monitor Specification --------------------------------------------------------------------------------------------------------------		04
2.LCD Monitor Description ---------------------------------------------------------------------------------------------------------		05
3.Operation Instructions ------------------------------------------------------------------------------------------------------------		05
3.1	General Instructions ------------------------------------------------------------------------------------------------------------	05
3.2	Control Button -------------------------------------------------------------------------------------------------------------------	06
3.3 Adjusting The Picture ----------------------------------------------------------------------------------------------------------		07
4. Input/Output Specification ------------------------------------------------------------------------------------------------------		08
4.1	Input Signal Connector --------------------------------------------------------------------------------------------------------	08
4.2	Factory Preset Display Modes ----------------------------------------------------------------------------------------------	09
4.3	Power Supply Requirements -------------------------------------------------------------------------------------------------	09
5.Panel Specification -------------------------------------------------------------------------------------------------------------------		10
5.1	General Feature -----------------------------------------------------------------------------------------------------------------	10
5.2	Optical Characteristics ---------------------------------------------------------------------------------------------------------	11
6. Block Diagram ----------------------------------------------------------------------------------------------------------------------		12
6.1	Monitor Exploded View -------------------------------------------------------------------------------------------------------	12
6.2	Software Flow Chart ------------------------------------------------------------------------------------------------------------	13
6.3	Electrical Block Diagram -------------------------------------------------------------------------------------------------------	15
6.3.1 Scalar Board ----------------------------------------------------------------------------------------------------------------		15
6.3.2 Inverter/Power Board -----------------------------------------------------------------------------------------------------		16
7. Schematic ----------------------------------------------------------------------------------------------------------------------------		17
7.1Main Board ----------------------------------------------------------------------------------------------------------------------		17
7.2	Power Board --------------------------------------------------------------------------------------------------------------------	23
8. PCB Layout --------------------------------------------------------------------------------------------------------------------------		26
8.1	Main Board -----------------------------------------------------------------------------------------------------------------------	26
8.2	Inverter/Power Board -----------------------------------------------------------------------------------------------------------	27
8.3	Key Board -------------------------------------------------------------------------------------------------------------------------	27
9. Maintainability -----------------------------------------------------------------------------------------------------------------------		28
9.1	Equipments and Tools Requirements --------------------------------------------------------------------------------------	28
9.2 Trouble Shooting ----------------------------------------------------------------------------------------------------------------		29
9.2.1 Main Board ---------------------------------------------------------------------------------------------------------------		29
9.2.2 Power/Inverter Board ---------------------------------------------------------------------------------------------------		32
9.2.3 Key Pad Board -------------------------------------------------------------------------------------------------------------		34
10. White-Balance, Luminance Adjustment ---------------------------------------------------------------------------------		35
11. Check List After Replacing LCD Main Board ----------------------------------------------------------------------------		37
12. EDID Content ----------------------------------------------------------------------------------------------------------------------		41
13. BOM List -----------------------------------------------------------------------------------------------------------------------------		42

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HP VS17T

Revision List

Version	Date	Revision History	TPV Mode Name
A00	Jan-05-06	Initial release	T780KS4DKHHPAP

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HP VS17T

1.Monitor Specification

Items		Description
	Driving system		TFT Color LCD
	Panel		LTM170EU-L11
	Size		337.920(H) x270.336 (V) (43.2cm 17.0")
LCD Panel	Pixel pitch		0.264mm( H )x 0.264mm( V )
	Viewable angle		140˚ (H) 120˚ (V)
	Response time (typ.)		16 ms
	Brightness		250
	Contrast		400:1
	Video		Analog
Input	Sync. Type		H/V TTL
	H-Frequency		30kHz – 83kHz
	V-Frequency		50-76Hz
Display Colors	Over 16 million Colors
Dot Clock	140MHz
Max. Resolution	1280 x 1024
Plug & Play	VESA DDC2BTM
	ON Mode		<37W
Power Consumption
	Sleep Mode		<2W
	OFF Mode		<1W
Power Source	90~265VAC,47~63Hz
Environmental	Operating Temp: 5°C to 35°C
	Storage Temp.: -20°C to 60°C
Considerations
	Operating Humidity : 20% to 80%
Main Dimensions	Unpackaged(W*H*D)		379.5mm*390.6mm*203.9mm
	Packaged(W*H*D)		454mm*454mm*175mm
Weight (N. W.)	Packaged		6.5Kg Unit
	Unpackaged		4.5Kg Unit

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HP VS17T

2.LCD Monitor Description

The LCD Monitor will contain main board, power board, 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 Inverter voltage to drive the backlight of panel and the main board chips each voltage.

Monitor Block Diagram

	CCFT Drive.	Flat Panel and
		CCFL backlight

Power Board				Main Board
										RS232 Connector
(Include adapter and inverter)
										For white balance
										adjustment in
										factory mode
		Audio board			Keyboard
AC-IN										Video signal, DDC
						HOST Computer
110V-240V

3. Operation Instructions

3.1 General Instructions

Press the power button to turn the monitor on or off. The other control buttons are located at front of the panel. By changing these settings, the picture can be adjusted to your personal performance.

-The power cord should be connected and insert to adaptor.

-Connect the video cable from the monitor to the computer VGA card.

-Press the power button to turn on the monitor, the power indicator will light up to Green.

3.2Control Buttons

-Power Button:

When pressed, the monitor enters the off mode, and the LED turns blank. Press again to restore normal status.

-Left / Right Button:

When the OSD show on screen, Left/Right Button are used to control the monitor functions. Press to switch functions or adjust settings. And if the OSD off, Left buttons is used to automatically set the H Position, V Position, Clock and Phase.

-Power Indicator:

Green — Power On mode. Orange — Power Saving mode. Blank — Power Off Mode.

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HP VS17T

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HP VS17T

3.3 Adjust the Picture

NO.	Control	Icons	NO.	Control	Icons
1	Brightness		16	Clock Phase
2	Contrast		17	Power Saver
3	Auto Adjustment		18	Mode Display
4	Image Control		19	Power-On Status Display
5	Color		20	Sleep Timer
6	Custom Color		21	Basic Menu
7	Language		22	Advanced Menu
8	Management		23	Power On Recall
9	OSD Control		24	Horizontal OSD Position
10	Information		25	Vertical OSD Position
11	Factory Reset		26	OSD Timeout
12	Default Video Input		27	OSD Transparency
13	Horizontal Position		28	Volume
14	Vertical Position		29	Exit
15	Clock

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HP VS17T

4. Input/Output Specification

4.1 Input Signal Connector

Pin	Mnemonic	Signal	Pin	Mnemonic	Signal
1	RV	Red Video	9	+5 V	+5 V (from PC)
2	GV	Green Video	10	SG	Sync Ground
3	BV	Blue Video	11	NC	None
4	NC	PC Connect detection	12	SDA	DDC Data
5	GND	Ground (DDC Return)	13	HS	Horizontal Sync
6	RG	Red GND	14	VS	Vertical Sync
7	GG	Green GND	15	SCL	DDC Clock
8	BG	Blue GND

VGA connector layout

PIN 1	PIN 5
PIN 11

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								HP VS17T
4.2 Factory Preset Display Modes
	Pixel	Horz Freq		Horz	Vert Freq	Vert	Pixel Clk
Preset	Format	(KHz)		Polarity	(Hz)	Polarity	(MHz)	Source
1	640 x 480	31.469		-	59.940	-	25.175	VGA
2	640 x 480	37.861		-	72.809	-	31.500	VESA
3	640 x 480	37.500		-	75.000	-	31.500	VESA
4	720 x 400	31.469		-	70.087	+	28.322	VGA
5	800 x 600	37.879		+	60.317	+	40.000	VESA
6	800 x 600	48.077		+	72.188	+	50.000	VESA
7	800 x 600	46.875		+	75.000	+	49.500	VESA
8	832 x 624	49.726		±	74.551	±	57.284	MAC
9	1024 x 768	48.363		-	60.004	-	65.000	VESA
10	1024 x 768	56.476		-	70.069	-	75.000	VESA
11	1024 x 768	60.023		+	75.029	+	78.750	VESA
12	1152 x 870	68.68		-	75.06	-	100.000	Mac
13	1152 x 900	71.71		-	76.05	-	105.561	Sun
14	1280 x 1024	63.98		+	60.02	+	108.000	VESA
15	1280 x 1024	79.97		+	75.02	+	135.000	VESA

4.3 Power Supply Requirements

Parameter Arameter	Range
AC Input Voltage	90 to 265V
AC Input Frequency	47 to 63 Hz
Inrush Current	50A MAX AT 220VAC and 30A AT 120VAC
Leakage Current	5 mA MAX at 120VAC
Power consumption	≤37W

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HP VS17T

5. Panel Specification

5.1 General Feature

Mechanical information

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HP VS17T

5.2 Optical Characteristics

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HP VS17T

6. Block Diagram

6.1 Monitor Exploded View

		G 7
G	*	G
		12G6063-1
	G
	G	*
					G
				G	*
		G	*
		G	*
		G
		G
				G
		G
		5	G	5
				G
		G	*
				G
		G
		G	*
		G	*
		G
				3
G		G
		8		G
		7		1
		G	63

.

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6.2 Software Flow Chart

1

Y

2

N

4

5 N

Y

6

7 N

Y

9

10 N

Y

N 12

Y

14

18	N	19

Y

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HP VS17T

3

8

11

13 N

Y

N

15 16

Y

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HP VS17T

REMARK:

1)MCU initialize.

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. Scalar initialize.

10)In standby mode?

11)Update the lifetime of back light.

12)Check the analog port, are they’re 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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6.3 Electrical Block Diagram

6.3.1 Scalar Board Block Diagram

Crystal 24MHz (Y601)

MCU

MTV-512MV (U601)

		Key Board
EEPROM
AT24C16		Control
(U602)		(CN602)

HP VS17T

LCD Interface

(CN503)

Scalar IC TSU56AK

(Include ADC, OSD)

(U401)

			H sync
			V sync
			RGB
Crystal			D-Sub
14.318MHz			Connector
(X401)			(CN301)
			DDC_CLK,
			DDC_DAT
			EEPROM
			M24C02
			(U301)

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HP VS17T

6.3.2 Inverter / Power Board Block Diagram

AC input			Bridge				Rectifier
	EMI filter				Transformer
			Rectifier				diodes
			and Filter

	StartCircuit:
R909/R910/R931								CN902
								12V
					Over		Feedback
	PWM
							Circuit
					Voltage			5V
	Control IC
					Protect

ON/OFF

LC
		Transformer		MOSFET
Resonance

Lamp

			Over					ON/OFF
Feedback
						PWM
Circuit			Voltage					Control
					Control IC
								DIM

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HP VS17T

7. Schematic

7.1 Main Board

SCHEMATIC

B2 FOR HPQ2005

	B1
				RIN	RIN
			GNDR		GNDR
	TXD			GIN	GIN
	RXD		GNDG		GNDG
	DDC_CLK			SOG	SOG
	DDC_DAT			BIN	BIN
				GNDB	GNDB
	ST_DET1		HSYNC		HSYNC
			VSYNC		VSYNC
	DDC_WP
	3.INPUT
	B3
	DDC_WP
	ST_DET1
	DDC_CLK			CSZ	CSZ
VCPU	DDC_DAT			SCL	SCL
	RXD			SDA	SDA
	TXD		HWRESET		HWRESET
	VCPU			INT	INT
	onPANEL_5V/3.3V			AD0	AD0
	onBACKLITE			AD1	AD1
	onPANEL_12V			AD2	AD2
				AD3	AD3
			AUDIO_SD
			ROUT+1
			LOUT+1
			OUT-L-
			OUT-L+
			OUT-R+
			OUT-R-
	6.MCU
	B6
5V	VCC5V		OUT-R-
			OUT-R+
			OUT-L+
			OUT-L-
	VCC5V		LOUT+1
	5V		ROUT+1
VCPU			AUDIO_SD
			VOLUME		VOLUME
VCC5V
				GND
VCC3.3
VCC1.8	7.AUDIO
VAA1
VAA2
VAA3
VAA4	B4
5V				GND
	onPanel_12V
	onBACKLITE
	onPanel_5V/3.3V
	VCPU
	VCC5V
	VCC3.3
	VCC1.8	AdjBACKLITE			AdjBACKLITE
	VAA1				VLCD_12V VLCD
	VAA2
	VAA3
	VAA4		VLCD_12V
	5V			VLCD	4.SCALER
	2.POWER

VCC1.8	VCC3.3	VAA1	VAA2	VAA3	VAA4
VCC1.8
VCC3.3
VAA1
VAA2
VAA3
VAA4
			B5
PA[0..9]	PA[0..9]			PA[0..9]
PB[0..9]	PB[0..9]			PB[0..9]
GA[0..3]	GA[0..3]			GA[0..3]
BA[0..5]	BA[0..5]			BA[0..5]	VLCD	VLCD_12V
					VLCD
ESP	ESP			ESP
	OSP			VLCD_12V
OSP				OSP
GPO[0..4]	GPO[0..4]			GPO[0..4]
			5.PANEL INTERFACE
		Title

AOC SCHEMATIC FOR HPQ2005

Size	Document Number				Rev
B	TOP				A
Date:	Monday, September 13, 2004	Sheet	1	of	7

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