AOC L1940 Service Manual

19" LCD Colour Monitor

Service

Service

Service

SH4 HP L1940

EJ6B6CT/74

EJ6B6CT/00

	Horizontal frequencies
	30 - 83 kHz
	TABLE OF CONTENTS
Description	Page
General Product Specification	-----------------------------------------------------------------------------------------------2~27
Scaler Schematic Diagram -------------------------------------------------------------------------------------------------	28~32
Scaler Board C.B.A.----------------------------------------------------------------------------------------------------------	33~34
Power Schematic Diagram--------------------------------------------------------------------------------------------------	35~36
Power Board C.B.A.----------------------------------------------------------------------------------------------------------	37~38
Control Schematic Diagram -----------------------------------------------------------------------------------------------------	39
Control Board C.B.A. --------------------------------------------------------------------------------------------------------	40~41
Spareparts list-----------------------------------------------------------------------------------------------------------------	42~43
Recommended parts list ---------------------------------------------------------------------------------------------------------	44
Different Parts List-----------------------------------------------------------------------------------------------------------------	45

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 TRANSFORMER FOR THIS UNIT WHEN SERVICING.

REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES

Published by BCU Monitors	Printed in Suzhou	Copyright reserved	Subject to modification K Jun. 30 2005				GB 3138 106 10487

2 HP L1940

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GENERAL PRODUCT SPECIFICATION

HP L1940

GENERAL PRODUCT

SPECIFICATION

. ANALOG AND DIGITAL DUAL INPUT

. AUTO PICTURE ADJUSTMENT

. 15 FACTORY PRESET MODES 10 USER MODES

. USER FRIENDLY OSD DISPLAY FOR MODE IDENTIFICATION/ADJUSTMENT

. DDC 2B COMMUNICATION CAPABILITY and DDC/CI SUPPORT

. MAX. RESOLUTION 1280*1024 NON-INTERLACED AT 76 HZ

. 19" COLOR TFT LCD FLAT PANEL

. EASY TILT & SWIVEL BASE

. FULL RANGE POWER SUPPLY 90 - 265 VAC

. CE ENVIRONMENTAL POLICY

. ANTI-GLARE TO REDUCE LIGHT REFLECTION

. POWER MANAGEMENT CAPABILITY

. TCO2003

. USB 2.0 HUB

19 inch LCD Monitor

					TYPE	: EJ6B6CT/74				8639 000 16572
					BRAND	: HP L1940
2005-06-03
	Thomas Chen					26			590			1
					2005-06-03

GENERAL PRODUCT SPECIFICATION(Continued)

HP L1940

3

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CONTENTS

1.0Foreword

2.0Product profile

2.1LCD

2.2Scanning frequencies

2.3Video dot rate

2.4Power input

2.5Power consumption

2.6Dimensions

2.7Weight

2.8Functions

2.9Ambient temperature

2.10Regulatory compliance

3.0Electrical characteristics

3.1Interface signals

3.2Interface

3.2.1D-sub cable

3.2.2DVI cable

3.2.3OSD function control

3.3Timing requirement

3.3.1Mode storing capacity

3.3.2Factory preset timings

3.3.3Horizontal scanning

3.3.4Vertical scanning

3.4Power input connection

3.5Power management

3.6Display identification

3.6.1Analog DDC

3.6.2Digital DDC

4.0Visual characteristics

4.1Test conditions

4.2Resolution

4.3Average surface brightness

4.4Brightness uniformity

4.5Check cross talk

4.6White color adjustment

5.0Mechanical characteristics

5.1Controls

5.2Unit dimension / weight

5.3Tilt and swivel base

5.4Transportation packages

5.4.1Shipping dimension / weight

5.4.2Block unit / palletization

6.0Environmental characteristics

6.1Susceptibility of display to external environment

6.1.1Temperature ranges

6.1.2Humidity

6.1.3Altitude

6.2Transportation tests

6.2.1Drop

6.2.2Vibration and shock

6.2.3Operating condition

6.2.4Non-operating

6.3Display disturbances from external environment

7.0Reliability

7.1Mean time between failures

19 inch LCD Monitor

					TYPE	:EJ6B6CT/74				8639 000 16572
					BRAND	:HP L1940
2005-06-03
	Thomas Chen					26			590			2
					2005-06-03

4 HP L1940

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GENERAL PRODUCT SPECIFICATION

8.0Quality assurance requirements

8.1Acceptance test

9.0Serviceability

10.0Defect

10.1Visual inspection

10.2Mechanical light leakage

10.3Allowable defect

10.4Defect limits

10.5Smudges, streaks and smears

10.6Mura and splotches

10.7Optical light leakage

10.8LCD inspection

11.0USB 2.0 HUB

19 inch LCD Monitor

					TYPE	: EJ6B6CT/74				8639 000 16572
					BRAND	: HP L1940
2005-06-03
	Thomas Chen					26			590			3
					2005-06-03

GENERAL PRODUCT SPECIFICATION(Continued)	HP L1940		5

					Go to cover page
1.0	FOREWORD
	This specification describes a 19" SXGA multi-scan color TFT LCD monitor with max resolution up to
	1280*1024 /76 Hz non-interlaced.
2.0	PRODUCT PROFILE
	This display monitor unit is a color display monitor enclosed in HP styling cabinet, which has an
	integrated tilt and swivel base.
	Branding Name				HP L1940
	Panel Technology			MVA or IPS
	HP Jewel				Y
	Blue LED Power Button				N
	VESA Mounting				Y
	VESA cover				N
	Internal Power Supply				Y
	Base Concept			double hinge
	Tilt				Y
	Swivel				Y
	Pivot				Y
	Height Adjustment				Y
	Detachable Base				Y
	Cable Management				Y
	Monitor Dimensions			413x477x265 mm
	Monitor Weight				8.4 Kg
	Packaged Dimensions			524x239x513 mm
	Packaged Weight				10 Kg
	USB HUB (up / down)				1 / 2
	USB Cable included				Y
	Internal Speakers				N
	External Speakers				N
	Audio Bar Compatible				Y
	Speaker Power Output				Y-via USB
	Speaker Power Cable included				N
	Detachable Video Cables				Y
	Audio Cable included				N
	VGA signal input				Y
	DVI-D signal input				Y
	DVI-I signal input				N
	VGA Cable included				Y
	DVI cable included (-D or -I)				N
	S-Video / Composite Video				N
	# of Presets				15
	19 inch LCD Monitor
	TYPE	:EJ6B6CT/74			8639 000 16572
	BRAND	:HP L1940
2005-06-03
	Thomas Chen		26	590	4
	2005-06-03

6 HP L1940

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GENERAL PRODUCT SPECIFICATION

Horizontal Frequency Range	30 - 83 kHz
Vertical Frequency Range	50 - 76 Hz
Maximum Pixel Clock	140 MHz
Panel Color Depth (bits / color)	6 + 2
Pixel Pitch	0.294 x 0.294 mm
Brightness (MIN)	200 nits
Contrast Ratio (MIN)	300
Viewing Angles (MIN / TYP)	140 / 150
Response Time (r+f TYP)	<25ms
OSD Controls Supported	hp 4 button
Maximum Power Consumption	70W
Sw Off / Sleep Pwr Consumption	1W / 2W
TCO03	Y

2.1LCD

a.)	Type NR.	: LM190E05_SL01 (LPL)
	Number of Pixels.	: 1280 (H) x 1024 (V)
	Physical Size.	: 396.0(H) 324.0(V) 20.0(D) mm
	Pixel Pitch.	: 0.294 x 0.294 mm
	Color pixel arrangement.	: RGB stripes arrangement
	Support Color.	: 8 bit (16.7M Colors)
	Display Mode.	: Transmissive Mode,Normally Black
	Backlight.	: CCFL edge light system
	Active area. (WxH).	: 376.32(H) x 301.06(V)mm (19" diagonal)
	Viewing Angle.	: Vertical 178 degree, Horizontal 178 degree (CR=10)
	Contrast ratio.	: 800:1
	Luminance.	: 250 cd/m2 (Typ)
b.)	Type NR.	: M190E3-L01 (CMO)
	Number of Pixels.	: 1280 (H) x 1024 (V)
	Physical Size.	: 404.22(H) 330.0(V) 20.0(D) mm
	Pixel Pitch.	: 0.294 x 0.294 mm
	Color pixel arrangement.	: RGB stripes arrangement
	Support Color.	: 8 bit (16.7M Colors)
	Display Mode.	: Transmissive Mode, Normally Black
	Backlight.	: CCFL edge light system
	Active area. (WXH).	: 376.32(H) x 301.056(V)mm (19" diagonal)
	Viewing Angle.	: Vertical 170 degree, Horizontal 170 degree (CR=10)
	Contrast ratio.	: 800:1
	Luminance.	: 250 cd/m2 (Typ)

2.2Scanning frequencies

	H-Frequency.	: 30K - 83 K Hz
	V-Frequency.	: 56 - 76 Hz
2.3	Video dot rate.	: < 140 MHz
2.4	Power input.	: 90-265 V AC, 50/60 2 Hz
2.5	Power consumption.	: < 70 W maximum (with USB )
2.6	Dimensions.	: 413(W) * 477(H) * 265(D) mm

		19 inch LCD Monitor
		TYPE	: EJ6B6CT/74		8639 000 16572
		BRAND	: HP L1940
2005-06-03
Thomas Chen			26	590			5

2005-06-03

GENERAL PRODUCT SPECIFICATION(Continued)

HP L1940

7

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2.7	Net Weight.				: 8.4 kg
2.8	Functions:
	(1)			D-Sub analog R/G/B separate inputs, H/V sync separated
	(2)			DVI-D digital Panel Link TMDS input
	(3)			USB 2.0 HUB with one upstream port and two downstream port
2.9	Ambient temperature				: 5 C - 35 C
2.10	Regulatory compliance:
					EN 60950 (IEC 950):
					CB SCHEME CERTIFICATION:
					UL APPROVAL:
					CSA APPROVAL:
					VDE / TUV APPROVAL:
					NORDIC SAFETY APPROVAL:
					MEXICAN SAFETY COMPLIANCE:
					POLAND COMPLIANCE (PCBC):
					RUSSIAN COMPLIANCE (GOST):
					SLOVENIAN APPROVAL (SIQ):
		Safety			SLOVAK REPUBLIC APPROVAL (EVPU):
					CROATIA APPROVAL (KONKAR):
					CHINA APPROVAL (CCC):
					SINGAPORE CONSUMER PROTECTION REGISTRATION SCHEME OF
					SINGAPORE ( SISIR ):
					UKRAINE APPROVAL (UKRSERTCOMPUTER):
					SAUDI ARABIA APPROVAL (SASO):
					BELARUS APPROVAL (BNCI):
					LITHUANIA APPROVAL (INFOSTRUKTURA):
					ARGENTINA CERTIFICATION (IRAM):
					FCC APPROVAL (USA): Part 15 class B
					C.I.S.P.R. REQUIREMENTS: C.I.S.P.R. Publication 22 Class B.
					V.C.C.I. APPROVAL (Japan): Class B.
					MINISTRY OF COMMERCE REQUIREMENTS (New Zealand): Class B.
					CANADIAN REQUIREMENTS: ICES-003 Class B
					AUSTRALIAN ACA APPROVAL: ACA AS/NZS 3548, Class B
					TAIWAN BSMI APPROVAL: (CNS) 13438 (CISPR 22), Class B
		EMC			CHINA CCC APPROVAL:
					KOREA MIC APPROVAL: MIC Korea "EMC Registration Regulation" Class B
					HARMONIC CURRENT EMISSIONS : IEC 61000-3-2 (EN 61000-3-3 )
					VOLTAGE FLUCTUATIONS FLICKER REQUIREMENTS:
					IEC 61000-3-3 ( EN 61000-3-2 )
					EN 55022:1998
					EN 55024 consisting of: IEC 61000-4-2 / -3 /-4/ -5 / -6 / -8 / -11
					ISO ERGONOMICS: ISO13406-2 (Class II is required for pixel defects )(TUV/ERG )
					SWEDISH ERGONOMICS AND EMISSIONS: MPRII, TCO99, Nutek
		Ergonomics			GERMAN ERGONOMIC APPROVAL: EK1-ITB2000 ( TUV/GS )
					TCO 2003 APPROVAL: (in feature)
					CCC (China), CE (Europe), CSA (Canada),
					IEC950 CB Report, NOMNYCE (Mexico),
		Agency			PSB (Singapore), SEMKO (Nordic), IRMA ( Argentina )
					TUV (Germany), UL (USA) GOST (Russia),
					B-MARK (Poland), DEMKO (Nordic), FIMKO (Nordic),
					SISIR, CPA (Singapore), EZU (Czech) , MIC ( Korea)
		Compatibility			PC2001, Windows 2000, Windows 98/Me, Windows XP, NSTL,USB-IF
				19 inch LCD Monitor
				TYPE	:EJ6B6CT/74	8639 000 16572

BRAND :HP L1940

2005-06-03

Thomas Chen	26	590		6

2005-06-03

8 HP L1940

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GENERAL PRODUCT SPECIFICATION

3.0Electrical characteristics

3.1Interface signals

The input signals can be applied in two different modes: 1). D-shell Analog

Input signal : Video, H-sync, V-sync,

Video	: 0.7 V p-p, input impedance, 75 ohm
Sync.	: Separate sync	TTL level, input impedance 2k2 ohm termination
	H-sync	Positive/Negative
	V-sync	Positive/Negative

2). Intel DVI Digital

Input signal: Four channel TMDS signals. The digital interface shall be comprised of 2 electrical layer component: a TMDS interface for low-voltage differential serial encoding of the digital display data(Panel Link compliant) and a DDC2B electrical interface. Refer to the Digital Display Working Group(DDWG) document, "Digital Visual Interface(DVI) Specification, Revision 1.0" for the exact requirements.

3.2			Interface
3.2.1	D-Sub Cable
				Length		: 1.8 M +/- 50 mm (fixed)
				Connector type		: D-sub male with DDC-2B pin assignments.
						Blue connector thumb-operated jack screws
Pin Assignment:
			PIN No.		SIGNAL
	1				Red video input
	2				Green video input
	3				Blue video input
	4				GND
	5				Cable detect

6Red video GND

7Green video GND

8Blue video GND

9DDC +3.3V or +5V

10GND

11GND

12Serial data line (SDA)

13H-sync

14V-sync

15Data clock line (SCL)

3.2.2DVI Cable

The input signals are applied to the display through DVI-D cable.
Length	: 1.8 M +/- 50 mm (fixed)
Connector type	: DVI-D male with DDC-2B pin assignments
	White connector thumb-operated jack screws

		19 inch LCD Monitor
		TYPE	: EJ6B6CT/74		8639 000 16572
		BRAND	: HP L1940
2005-06-03
Thomas Chen			26	590			7

2005-06-03

GENERAL PRODUCT SPECIFICATION(Continued)	HP L1940		9

						Go to cover page
Pin Assignment:
		Pin No.	Description
		1	T.M.D.S. data2-
		2	T.M.D.S. data2+
		3	T.M.D.S. data2 shield
		4	No Connect
		5	No Connect
		6	DDC clock
		7	DDC data
		8	No Connect
		9	T.M.D.S. data1-
		10	T.M.D.S. data1+
		11	T.M.D.S. data1 shield
		12	No Connect
		13	No Connect
		14	+5V Power
		15	Ground (for +3.3V) - Cable detect
		16	Hot plug detect
		17	T.M.D.S. data0-
		18	T.M.D.S. data0+
		19	T.M.D.S. data0 shield
		20	No Connect
		21	No Connect
		22	T.M.D.S clock shield
		23	T.M.D.S. clock+
		24	T.M.D.S. clock-
3.2.3	OSD Function Control
	Philips follow up HP's requirement to create OSD function and HP approve the OSD function. If any deviation
	between sheet 590 and customer specification and really product, production should follow up really product.
	OSD (On Screen Display) function
	(1) Analog interface OSD:
	a.	Basic OSD Menu Levels
			Analog Mode Menu
		Menu LEVEL 1		Menu LEVEL 2
	Brightness		ADJ Scale
	Contrast		ADJ Scale
	Auto Adjustment
	Advanced Menu
	Exit
			Digital Mode Menu
		Menu LEVEL 1		Menu LEVEL 2
	Brightness		ADJ Scale
	Contrast		ADJ Scale
	Advanced Menu
	Exit
		19 inch LCD Monitor
		TYPE	:EJ6B6CT/74			8639 000 16572
		BRAND	:HP L1940
2005-06-03
Thomas Chen			26		590	8
		2005-06-03

10 HP L1940

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GENERAL PRODUCT SPECIFICATION

Brightness & Contrast	: brightness and contrast adjustment
Auto Adjustment	: Auto Adjustment Function
Advanced Menu	: Enter Advanced Menu Levels

a.Advanced OSD Menu Levels

		Analog Mode Menu
	Menu Level 1	Menu Level 2	Menu Level 3
	Brightness	ADJ Scale
	Contrast	ADJ Scale
	Image Control	Auto Adjustment	("Adjusting" message )
		Horizontal Position	ADJ Scale
		Vertical Position	ADJ Scale
		Clock	ADJ Scale
		Clock Phase	ADJ Scale
		Cancel
		Save and Return
	Color	9300 K
		6500 K
		Custom Color	Custom Color ADJ
		sRGB
		Cancel
		Save and Return
	Language	Deutsch
		S-Chinese
		English
		Espanol
		Francais
		Italiano
		Nederlands
		Cancel
		Save and Return
	Management	Power Saver	On / Off Selection
		Power On Recall	On / Off Selection
		Mode Display	On / Off Selection
		Sleep Timer	Timer Set Menu
		Defualt Video Input	- Analog - VGA
			- Digital - DVI
		Basic Menu
		Cancel
		Save and Return
	OSD Control	Horizontal OSD Position	ADJ Scale
		Vertical OSD Position	ADJ Scale
		OSD Timeout	ADJ Scale
		Cancel
		Save and Return
	Information	Current Settings
		Recommended Settings
		Serial Number
		Total Hours
		Backlight Hours
		Exit

					19 inch LCD Monitor
					TYPE	: EJ6B6CT/74				8639 000 16572
					BRAND	: HP L1940
2005-06-03
	Thomas Chen					26			590			9
					2005-06-03

GENERAL PRODUCT SPECIFICATION(Continued)

HP L1940

11

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Factory Reset		Yes
		No
Exit
			Digital Mode Menu
	Menu Level 1		Menu Level 2		Menu Level 3
Brightness		ADJ Scale
Contrast		ADJ Scale
Color		9300 K
		6500 K
		Custom Color		Custom Color ADJ
		sRGB
		Cancel
		Save and Return
Language		Deutsch
		S-Chinese
		English
		Espanol
		Francais
		Italiano
		Nederlands
		Cancel
		Save and Return
Management			Power Saver	On / Off Selection
		Power On Recall		On / Off Selection
		Mode Display		On / Off Selection
		Sleep Timer		Timer Set Menu
		Default Video Input		- Analog - VGA
				- Digital - DVI
		Basic Menu
		Cancel
		Save and Return
OSD Control		Horizontal OSD Position		ADJ Scale
		Vertical OSD Position		ADJ Scale
		OSD Timeout			ADJ Scale
		Cancel
		Save and Return
Information		Current Settings
		Recommended Settings
		Serial Number
		Total Hours
		Backlight Hours
		Exit
Factory Reset		Yes
		No
Exit

					19 inch LCD Monitor
					TYPE	:EJ6B6CT/74				8639 000 16572
					BRAND	:HP L1940
2005-06-03
	Thomas Chen					26			590			10
					2005-06-03

12 HP L1940

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GENERAL PRODUCT SPECIFICATION

C.OSD Service Mode Menu

Analog Mode Menu

		Menu Level 1			Menu Level 2	Menu Level 3
		Brightness			ADJ Scale
		Contrast		ADJ Scale
		Image Control		Auto Adjustment		("Adjusting" message )
					Horizontal Position	ADJ Scale
					Vertical Position	ADJ Scale
					Clock	ADJ Scale
					Clock Phase	ADJ Scale
					Cancel
					Save and Return
		Color		9300 K
					6500 K
					Custom Color	Custom Color ADJ
					sRGB
					Cancel
					Save and Return
		Service			Display Hours
					Reset Total Hours	Confirm Reset
					Reset Backlight Hours	Confirm Reset
					Copy All Settings	Confirm Reset
					Recall All Settings	Confirm Reset
					Display White Block
					Unlock EDID Write
					Cancel
					Save and Return
		Management		Power Saver		On / Off Selection
					Power On Recall	On / Off Selection
					Mode Display	On / Off Selection
					Sleep Timer	Timer Set Menu
					Default Video Input	- Analog - VGA
						- Digital - DVI
					Basic Menu
					Cancel
					Save and Return
		OSD Control			Horizontal OSD Position	ADJ Scale
					Vertical OSD Position	ADJ Scale
					OSD Timeout	ADJ Scale
					Cancel
					Save and Return
		Information		Current Settings
					Recommended Settings
					Serial Number
					Total Hours
					Backlight Hours
					Exit
			19 inch LCD Monitor
			TYPE		: EJ6B6CT/74	8639 000 16572

BRAND : HP L1940

2005-06-03

Thomas Chen	26	590		11

2005-06-03

GENERAL PRODUCT SPECIFICATION(Continued)

HP L1940

13

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Factory Reset		Yes
		No
Exit
		Digital Mode Menu
	Menu Level 1	Menu Level 2		Menu Level 3
Brightness		ADJ Scale
Contrast		ADJ Scale
Color		9300 K
		6500 K
		Custom Color	Custom Color ADJ
		SRGB
		Cancel
		Save and Return
Service		Display Hours
		Reset Total Hours	Confirm Reset
		Reset Backlight Hours	Confirm Reset
		Copy All Settings	Confirm Reset
		Recall All Settings	Confirm Reset
		Display White Block
		Unlock EDID Write
		Cancel
		Save and Return
Management		Power Saver	On / Off Selection
		Power On Recall	On / Off Selection
		Mode Display	On / Off Selection
		Sleep Timer	Timer Set Menu
		Default Video Input	- Analog - VGA
			- Digital - DVI
		Basic Menu
		Cancel
		Save and Return
OSD Control		Horizontal OSD Position		ADJ Scale
		Vertical OSD Position		ADJ Scale
		OSD Timeout		ADJ Scale
		Cancel
		Save and Return
Information		Current Settings
		Recommended Settings
		Serial Number
		Total Hours
		Backlight Hours
		Exit
Factory Reset		Yes
		No
Exit

					19 inch LCD Monitor
					TYPE	:EJ6B6CT/74				8639 000 16572
					BRAND	:HP L1940
2005-06-03
	Thomas Chen					26			590			12
					2005-06-03

14 HP L1940

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GENERAL PRODUCT SPECIFICATION

3.3Timing requirement

3.3.1

Mode storing capacity

(1) Factory preset modes

: 15

(2) User modes

: 10

3.3.2

Factory preset timings

The factory settings of size and centering are according to the reference timing charts(See Fig-47, Fig-58)

MODE NO.

1

2

3

4

RESOLUTION

640 x 480

640 x 480

640 x 480

720 x 400

Dot clock(MHz)

25.175

31.500

31.501

28.321

f h

31.5kHz

37.861kHz

37.5kHz

31.468kHz

A ( us )

31.778(800 dots)

26.413(832 dots)

26.667 (840 dots)

31.78(900dots)

B ( us )

3.813( 96 dots)

1.270(40 dots)

2.032

(

54 dots)

3.813(108dots)

C ( us )

1.907(

48 dots)

3.810(120 dots)

3.81

(

120 dots)

1.907(54dots)

D ( us )

25.422( 640 dots)

20.317(640 dots)

20.317

(640 dots)

25.42(720dots)

E ( us )

0.636(

16 dots)

1.016(32 dots)

0.508

(

26 dots)

0.636(18dots)

f v

60Hz

72.809Hz

75Hz

70Hz(70.085)

O (ms )

16.683 (525 lines)

13.735(520 lines)

13.333 (500 lines )

14.27(449 lines)

P ( ms )

0.064

( 2 lines)

0.079(3 lines)

0.08

(

3 lines )

0.064(2 lines)

Q (ms )

1.049

( 33 lines)

0.528(20 lines)

0.427 ( 16 lines )

1.112(34 lines)

R ( ms )

15.253 (480 lines)

12.678(480 lines)

12.8

(480 lines )

12.71(400 lines)

S ( ms )

0.317

( 10 line )

0.45(17 lines)

0.026

(

1 lines)

0.381(13 lines)

SYNC. H/V

- / -

-/-

- / -

-/+

POLARITY

SEP . SYNC

Y

Y

Y

Y

MODE NO.

5

6

7

8

RESOLUTION

800 x 600

800 x 600

800 x 600

832 x 624

Dot clock(MHz)

40

50

49.498

57.28

f h

37.9kHz

48.077kHz

46.9kHz

49.7kHz

A ( us )

26.4 (1056 dots)

20.80

(1040dots)

21.333 (1056 dots)

20.11(1152 dots)

B ( us )

3.2 (

128 dots)

2.400

( 120 dots)

1.616 ( 80 dots)

1.117(64 dots)

C ( us )

2.2 ( 88 dots)

1.280

(

64

dots)

3.232 (

160 dots)

3.91(224 dots)

D ( us )

20 ( 800 dots)

16.00

( 800 dots)

16.162 ( 800 dots)

14.52(832 dots)

E ( us )

1 ( 40 dots)

1.120

(

56

dots)

0.323 (

16 dots)

0.563(32 dots)

f v

60Hz

72Hz (

72.188)

75Hz

75Hz

O (ms )

16.579 (628 lines)

13.85

(666 lines)

13.333 (625 lines)

13.41(667 lines)

P ( ms )

0.106 ( 4 lines)

0.125

(

6

lines)

0.064 (

3 lines)

0.06(3 lines)

Q (ms )

0.607 ( 23 lines)

0.478

( 23

lines)

0.448 ( 21 lines)

0.784(39 lines)

R ( ms )

15.84 (600lines)

12.48

(600 lines)

12.8 (600 lines)

12.55(624 lines)

S ( ms )

0.026 ( 1 line )

0.770

( 37

line )

0.021 ( 1 line )

0.016(1 lines)

SYNC. H/V

+ / +

+ / +

+ / +

+/+

POLARITY

SEP . SYNC

Y

Y

Y

Y

19 inch LCD Monitor

					TYPE	: EJ6B6CT/74				8639 000 16572
					BRAND	: HP L1940
2005-06-03
	Thomas Chen					26			590			13
					2005-06-03