AOC F1703 Service Manual

HP f1703 Service Manual

SERVICE MANUAL

17” LCD Monitor

f1703

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 RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS.

1

HP f1703 Service Manual

Table of Contents

Table Of Contents --------------------------------------------------------------------------------------------------------------------		2
1. Monitor Specifications ------------------------------------------------------------------------------------------------		4
2. LCD Monitor Description ------------------------------------------------------------------------------------------------		5
3. Operating Instructions ---------------------------------------------------------------------------------------------		6
3.1	General Instructions -----------------------------------------------------------------------------------------------	6
3.2	Control Buttons -----------------------------------------------------------------------------------------------------	6
3.3 Adjusting the Picture -----------------------------------------------------------------------------------------------		7
4. Input/Output Specification ----------------------------------------------------------------------------------------------------------		8
4.1	Input Signal Connector----------------------------------------------------------------------------------------------------------	8
4.1.1 Analog D-SUB Connector ---------------------------------------------------------------------------------------------------		8
4.2	Factory Preset Display Modes ---------------------------------------------------------------------------------------------------	9
4.3	Power Supply Requirements -------------------------------------------------------------------------------------------------	10
4.3.1 Input Requirements ------------------------------------------------------------------------------------------------------		10
4.3.2 Output Requirements--------------------------------------------------------------------------------------------------------		10
4.4 PANEL SPECIFICATION (Samsung) ------------------------------------------------------------------------------------		11
4.4.1 Panel Feature --------------------------------------------------------------------------------------------------------------		11
4.4.2 Display Characteristics --------------------------------------------------------------------------------------------------------		11
4.4.3 Optical Characteristics -------------------------------------------------------------------------------------------------------		11
4.4.4 Parameter Guide Line For CCFL Inverter ----------------------------------------------------------------------------		12
5. Block Diagram -------------------------------------------------------------------------------------------------------------------		13
5.1	Monitor Exploded View --------------------------------------------------------------------------------------------------------	13
5.1.1 F1703 --------------------------------------------------------------------------------------------------------------------------		13
5.2	Software Flow Chart --------------------------------------------------------------------------------------------------------------	18
5.3	Electrical Block Diagram -----------------------------------------------------------------------------------------------------	20
5.3.1 Main Board -------------------------------------------------------------------------------------------------------------------		20
5.3.2 Inverter/Power Board -------------------------------------------------------------------------------------------------------		21
6. Schematic ----------------------------------------------------------------------------------------------------------------------------		22
6.1	Main Board -------------------------------------------------------------------------------------------------------------------	22
6.2	Inverter/Power Board ------------------------------------------------------------------------------------------------------	26
6.3	Keypad Board -------------------------------------------------------------------------------------------------------------------	27
7. PCB Layout ---------------------------------------------------------------------------------------------------------------------------		28
7.1	Main Board -------------------------------------------------------------------------------------------------------------------	28
7.2	Inverter/Power Board ------------------------------------------------------------------------------------------------------	29
7.3	Keypad Board ---------------------------------------------------------------------------------------------------------------------	30
8. Maintainability ---------------------------------------------------------------------------------------------------------------------		31
8.1	Equipments And Tools Requirement ------------------------------------------------------------------------------------	31
8.2 Trouble Shooting -------------------------------------------------------------------------------------------------------------		32
8.2.1 Main Board -------------------------------------------------------------------------------------------------------------------		32

2

		HP f1703 Service Manual
8.2.2 Power/Inverter Board		------------------------------------------------------------------------------------------------------34
8.2.3 Keypad Board -------------------------------------------------------------------------------------------------------------		37
8.3 Alignment Procedure -----------------------------------------------------------------------------------------------------		38
8.4	EDIT Content --------------------------------------------------------------------------------------------------------------------	39
8.5	Serial Number Format -------------------------------------------------------------------------------------------------------	40
9. Part Lists --------------------------------------------------------------------------------------------------------------------------		41

3

		HP f1703 Service Manual
1. MONITOR SPECIFICATIONS
	Driving system	TFT Color LCD
LCD Panel	Size	43.2cm(17.0")
	Pixel pitch	0.264mm( H )x 0.264mm( V )
	Viewable angle	120˚ (H) 90˚ (V)
	Response time (typ.)	25 ms
	Video	Analog
Input	Sync. Type	H/V TTL
	H-Frequency	30kHz – 83kHz
	V-Frequency	56-76Hz
Display Colors		16.2 million Colors
Dot Clock		108MHz
Max. Resolution		1280 x 1024
Plug & Play		VESA DDC2BTM
Power Consumption	ON Mode	<48W
	(Speakers Connected)
	ON Mode	<36W
	(Without Speakers)
	OFF Mode	<2W
	(Audio Volume=0)
Maximum Screen Size		Horizontal : 13.3”(337.92mm)
		Vertical : 10.6”(270.336mm)
Power Source		90~264VAC,47~63Hz
Environmental		Operating Temp: 5°C to 35°C
Considerations		Storage Temp.: -20°C to 60°C
		Operating Humidity : 20% to 80%
Weight (N. W.)
F1703		5.5Kgs Unit (net)

4

HP f1703 Service Manual

2. LCD MONITOR DESCRIPTION

The LCD MONITOR will contain an main board, an inverter/power board, keypad board and external adapter which house the flat panel control logic, brightness control logic and DDC.

The Inverter board will drive the backlight of panel and the DC-DC conversion. The Adapter will provides the 12V DC-power to inverter/power board.

Monitor Block Diagram

	CCFT Drive.	Flat Panel and
		CCFL backlight

		Inverter Board
											RS232 Connector
		(with DC-DC module)				Main Board
											For white balance
											adjustment in
											factory mode
						Keyboard
AC-IN
		ADAPTER
							HOST Computer
90V-264V										Video signal, DDC

5

HP f1703 Service Manual

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

-Power Button:

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

-Left / Right Button:

The Left/Right Button is used to control the monitor functions. Press to switch functions or adjust settings.

-Auto Adjust Key:

The Auto Adjust Key is used to automatically set the H Position, V Position, Clock and Phase.

- Power Indicator:

Blue	— Power On mode.
Amber	— Power Saving mode.
Blank	—Power Off Mode.

CONTROL Buttons

6

HP f1703 Service Manual

3.3 ADJUSTING THE PICTURE

1.		Brightness/	Adjust the brightness or the difference between the light and
		Contrast	dark area.
			Adjust the:
			z	horizontal position of the screen image.
2.		Image Control	z	vertical position of the screen image.
			z	frequency of the pixel clock to minimize vertical bar.
			z	phase value to minimize horizontal jitters.
			Displays a sub-menu with two option:
			z	Color: adjusts the color tint of white, and the red,
3.		Advance		green, and blue (RGB) mix for colors.
			z	OSD (on Screen Display) settings: adjusts the
				position, timeout, and notification features of the On
				Screen Display window.
		Auto	Adjusts the main settings and produces a stable, centered
4.		Configuration
			image.
		Factory	Resets the display to original factory settings for color,
5.		settings	brightness, phase, and clock.
		Language	Shows the language of the OSD window.
6.
			Shows the current resolution and refresh rate;
7.		Information	Shows the serial number of display; shows the power-on
			time, and the power-saving time.
8.		Exit	Closes the OSD window.

7

HP f1703 Service Manual

4. Input/Outpt Specification

4.1 Input Signal Connector

4.1.1 Analog D-SUB Connector

PIN	MNEMONIC	SIGNAL
1	RV	Red Video
2	GV	Green Video
3	BV	Blue Video
4	NC	None (available for mfg use if required)
5	GND	Ground (DDC Return)
6	RG	Red GND
7	GG	Green GND
8	BG	Blue GND
9	+5 V	+5 V (from PC)
10	SG	Sync Ground
11	NC	None (available for mfg use if
		required)
12	SDA	DDC Data
13	HS	Horizontal Sync
14	VS	Vertical Sync
15	SCL	DDC Clock

VGA connector layout

PIN 1	PIN 5
PIN 11

8

HP f1703 Service Manual

4.2 Factory Preset Display Modes

		Horz	Horz	Vert	Vert
Prese	Pixel	Freq	Polarit	Freq	Polarit	Pixel Clk
t	Format	(KHz)	y	(Hz)	y	(MHz)	Source
1	640 x 350	31.469	+	70.086	-	25.175	VGA
2	640 x 480	31.469	-	59.940	-	25.175	VGA
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	46.875	+	75.000	+	49.500	VESA
7	1024 x 768	48.363	-	60.004	-	65.000	VESA
8	1024 x 768	56.476	-	70.069	-	75.000	VESA
9	1024 x 768	60.023	+	75.029	+	78.750	VESA
10	1280 x	63.981	+	60.02	+	108.0	VESA
	1024
11	1280 x	79.976	+	75.035	+	135.0	VESA
	1024

9

HP f1703 Service Manual

4.3 Power Supply Requirements

4.3.1 Input Requirements

PARAMETER		RANGE				CONDITION
Input Voltage	90 to 264 VAC RMS				Universal input full range
Input Frequency	60Hz @ 90VAC		to	50Hz @
	264VAC
Input Current	Less than 2.0 Amps RMS				Input voltage 100 VAC RMS ; 60 Hertz. Parameter
					must be reached within 3 seconds of turn-on.
	Less than 1.0 Amps RMS				Input voltage 220 VAC RMS ; 50 Hertz. Parameter
					must be reached within 3 seconds of turn-on.
Input Power	Less than 75 Watts
Power factor > 0.5	Input voltage 120 VAC RMS ; 60
	Hertz
Inrush Current	Less than 30 A peak				Input voltage 100 VAC RMS ; 60 Hertz at all
					Phase(0, 90, 180, 270 degree)
	Less than 50 A peak				Input voltage 240 VAC RMS ; 50 Hertz at all
					Phase(0, 90, 180, 270 degree)
Input Fusing	Fuse should be located internal to the				Fuse must be UL/CSA approved. Fuse value must no
	adapter, easily accessible when the				have to change for 115 VAC or 230 VAC operation
	cover is removed
Leakage Current	Less than 3.5 mA				Input voltage 264 Volts RMS ; 50 Hertz
Hi-Pot	Primary to secondary				1.5KVAC for 1 Minute(leakage current 10mA)
					1.8KVAC for 1 Minute(leakage current 10mA)
					3.0KVAC for 1 Minute(leakage current 10mA)
					without Y-cap & Coupling cap.
	Primary to Saft Ground				1.5KVAC for 1 Minute(leakage current 10mA)
					1.8KVAC for 1 Minute(leakage current 10mA)
4.3.2 Output Requirements
PARAMETER		RANGE				CONDITION
DC Out		12VDC ± 5%				Min 0A Max 3.75A
Load Regulation		12.0V(12.12V) ± 5%				11.4 to 12.6VDC
Dynamic Load		Any frequency	up	to 250Hz(duty		±5% for 10% to 100%, 100% to 10% load change for
Regulation		50%)				+12Vdc
Ripple & noise		170mVpp at 12VDC				Input voltage : 100VAC at 60Hz 240VAC at 50Hz
						* Ripple and noise are measured.
Output current		less than 7.0A, more than 12.0A				Current exceeds maximum rateing more than 20%
protection		at 12.0VDC
Leakage Current		Less than 0.25 mA				Input voltage 100 Volts RMS ; 50 Hertz
		Less than 0.5 mA				Input voltage 254 Volts RMS ; 50 Hertz

10

HP f1703 Service Manual

4.4 PANEL SPECIFICATION (Samsung )

4.4.1 Panel Feature

-High contrast ratio, high aperture structure -TN(Twisted Nematic) mode

-Wide viewing angle -High speed response

-SXGA(1280 x 1024 pixels) resolution -Low power consumption

-2 dual CCFTs(Cold Cathode Fluorescent Tube) -DE(Data Enable) mode

-COMPACT SIZE DESIGN

4.4.2 Display Characteristics

Items	Specification	Unit
Display Area	337.92(H) x 270.336(V)	mm
Driver element	a-Si TFT active matrix	Colors
Display color	16.2M
Number of pixels	1280 x 1024	pixel
Pixel Arrangement	RGB vertical stripe	mm
Pixel pitch	0.264(H) x 0.264(W)
Display Mode	Normally White
Surface treament	Haze 25% , Hard-coating (3H)

4.4.3 Optical Characteristics

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

		Item		Symbol	Conditions	Min.	Typ.	Max.	Unit	Note
Contrast Ratio				C/R		250	350	-
(Center of screen)
Response			Rising	Tr		-	5	7	msec
Time			Falling	Tf		-	20	25
					Normal
Luminance of White				YL		200	250	-	Cd/m2
(Center of screen)					ψ=0
				Rx	θ=0		0.633
		Color		Ry	Viewing		0.351
				Gx	Angle		0.298
	Chromaticity					Typ.		TYP.
				Gy			0.592
		(CIE 1931)				-0.03		+0.03
				Bx			0.143
	Coordinates (CIE)
				By			0.092
				Wx			0.316
				Wy			0.337
Brightness Uniformity				[%]		75	80	-

11

HP f1703 Service Manual

4.4.4 Parameter guide line for CCFL Inverter

INVERTER MAX BRINGTHNESS (Vadj:4.0v), LOAD=120KΩX4(ROOM TEMPERATURE 25 ±4 )

ITEM	SYMBOL	MIN.	TYP.	MAX.	UNIT	REMARK
Input voltage	Vin	10.8	12	13.2	V
Input current	Iin		2300	2550	mA	FOR 4 LOAD
Output Current	Iout	6.0	6.5	7.0	mA	FOR 1 LOAD
Frequency	F	52.0	57.0	62.0	KHZ	FOR 1 LOAD
H.V open	Vopen	1500	1650	1800	Vrms	NO LOAD
H.V Load	Vload	710	810	910	Vrms	RL=120KΩ
Start voltage	Vst	1700	1850	2000	Vrms	RL=CCFL
Protect delay time	PDT	0.4	1		Sec

12

HP f1703 Service Manual

5. Block Diagram

5.1 Monitor Exploded View

5.1.1 f1703

13

HP f1703 Service Manual

14

HP f1703 Service Manual

15

HP f1703 Service Manual

5.2 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

16

HP f1703 Service Manual

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. Scaler initialize.

10)In standby mode ?

11)Update the life time of back light.

12)Check the analog and digital port, are there any signals coming ?

13)Does the scalar send out a interrupt request ?

14)Wake up the scalar.

15)Are there any signals coming from analog or digital port ?

16)Display "Check Video 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 ?

17

HP f1703 Service Manual

5.3 Electrical Block Diagram

5.3.1 Main Board

LCD

Interface (CN3)

LVDS

THC63LVDM83A

(U2)

		ADE_SDA,	Scalar ADE3000SX
MCU		ADE_SCL	(Include ADC,OSD)
W78E65P
(U8)			(U1)

			EPR_SDA		RXD			Hsync,
								Vsync
			EPR_SCL		TXD		RGB
OSD									DB15_SDA,
Control		EEPROM					D-Sub		DB15_SCL	EEPROM
Interface		24C16					Connector			24C02
(CN1)		(U9)					(CN1)			(U2)

18