ASUS PA246Q Service manual

Service Manual

PA246Q

LCD Monitor Service Manual

Model: PA246Q

V 1.0

RESTRICTIONS ON USE OF MATERIALS:

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Service Manual

PA246Q

Important Safety Notice

Proper service and repair is important to the safe, reliable operation of all ASUS equipment. The service procedures recommended by ASUS 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. ASUS 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, ASUS has not undertaken any such broad evaluation. Accordingly, who uses a service procedure or tool which is not recommended by ASUS must first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected.

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 body is grounded through wrist band.

-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 as hort circuit within the module.

-If the surface of panel became dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)

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1 Monitor Specifications

1.1 Introduction

This specification describes ASUS PA246Q, a 24” Wide multi-interface (Analog +DVI +HDMI +DisplayPort) color TFT LCD monitor. The display supports up to 1920*1200/60 Hz resolution & refresh rate and 1.07 billion colors (HDMI & DP).The features summary is shown below,

Feature items		Specifications	Remark
Panel supplier & Panel type of supplier		LGD LM240WU4-SLB3	Transmissive mode, normally black
Actual Size Diagonal display		24” Wide (16:10)	Panel display size
Actual Resolution display		(1920x1200/60Hz)	Panel display resolution
		178 degrees Horizontal
Viewing Angle (at Contrast Ratio 10)		(typ.)	Panel spec
		178 degrees Vertical (typ.)
Color Gamut		102%
Analog interface with Scaling supported		Yes	With 15 pin D-sub connector
DVI interface with Scaling supported		Yes	With 24 pin DVI-D connector
HDCP supported		Yes
HDMI supported		Yes	With 19 pin HDMI connector
DisplayPort supported		Yes	With 20 pin DisplayPort connector
Video interface with Scaling supported		No	N.A.
Max resolution mode supported		1920x1200@60Hz
Number of Display Colors supported		1.07 billion colors	8-bit + A-FRC,
Contrast Ratio		1000:1 (typ.)
			The monitor would increase the backlight
Dynamic Contrast Ratio		50000:1	when display a dark image.
			Scenery Mode : under 7 gray scale
			Theater Mode : under 17 gray scale
		1.) LCD panel luminance	1.) Panel luminance spec is measured at
		spec: 400 cd/m2 (typ.)	saturated R/G/B and CCFL=6~7mA (typ.)
		320 cd/m2 (min.)	condition.
Luminance		2.) Monitor’s factory
		default luminance spec:	2.) Monitor’s factory default luminance spec
		270 cd/m2 (typ.)	is measured at User Mode default color
		370 cd/m2 (max.)	temperature (6500K).
AC power input		Yes	100-240Volts, 50/60 Hz.
DC power input (with AC power adapter)		No
DPMS supported		< 1 Watt
LED indicator for power status showed		Yes	White/Orange/Non
OSD for control & information supported		Yes
Multi-language supported for OSD		Yes	10 languages
Buttons control supported		Yes	7 buttons including 1 monitor power on/off
			control button
Flywheel control supported		No
Scaling function supported		Yes	ST STDP8028(Mars)
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Service Manual				PA246Q
	Auto adjustment function supported		Yes	Press and hold “Splendid-key” for 2 ~ 4
				seconds
	DDC function supported (EDID ver.1.3)		Yes	DDC2B
	DDC-CI support version 1.1 or later		Yes	DDC-CI
	Audio speakers supported		No
	Audio Jack (input connector) supported		No
	Earphone Jack (output connector)		Yes
	supported
	Microphone function supported		No	N.A.
	USB 2.0 hub supported		Yes	2 USB ports
				Supported Media Types :
				Memory Stick (MS),
				High Speed Memory Stick (HSMS),
				Memory Stick PRO (MSPRO),
				Memory Stick Duo(w Adapter),
				MS Duo Secure Digital (Mini-SD),
				Secure Digital Card,
				Mini Secure Digital(w Adaptor),
				TransFlash(SD, including SDHC),
	Card reader supported		Yes	MultiMediaCard(MMC),
				Reduced Size MultiMediaCard(RS-MMC),
				NAND Flash,
				xD
				Card Slots :
				Lower Slot (built-in Push Ejection
				Mechanism):
				SD / MS / MMC/xD – direct insertion
				MS Duo / Mini-SD / TransFlash Card /
				RS-MMC – with adapter
	Mechanical Tilt base design		Yes
	VESA wall mounting design		Yes
	Mechanical Rotate design		Yes
	Mechanical Lift base design		Yes

1.2 Dimension
Item	Condition	Spec	OK	N.A Remark
Bezel opening		520.4 x 326 mm	√
Monitor without Stand	L x W x D mm	558.4*380.8*79 mm	√
Monitor with Stand	L x W x D mm	558.4*380.8*235 mm	√
Carton Box (outside)	L x W x H mm	683*457*298 mm	√
Tilt, Swivel and Lift range		Tilt: -5/+20 degree	√
		Swivel: ±60 degree
		Lift: 100mm
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Service Manual					PA246Q
1.3 Weight
Item	Condition	Spec	OK	N.A	Remark
Monitor (Net)	7.3 kg	+/- 4%	√
Monitor with packing (Gross)	10 kg	+ 5%	√

1.4 Plastic
Item	Condition	Spec	OK	N.A Remark
Flammability	UL	94 HB	√
Heat deflection To	ABS	75	√
UV stability	ABS	Delta E < 3.0	√
Resin	ABS/HB	GPPC D350	√
		BASF GP-35
		CHEIL SD0150
		CHIMEI PA757
		LG HF380
		KINGFA HP-126
Texture		MT-11000	√
		MT-11010
		MT-11020

Color

DB39A

√

1.5 Carton

Item

Condition

Spec

OK N.A Remark

Color	Color box	√
Material	BC Flute	√
Compression strength	400 KGF
Burst Strength	18 KGF/cm2
Stacked quantity	7 layers	√

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2 Operation Instructions

2.1 Video performance
Item	Condition			Spec	OK	N.A Remark
	Any input resolution modes
Resolution	which	are	under	1920 x1200@60Hz	√
	1920x1200

Contrast ratio			1000:1(typ.)	√
Brightness	At R G	B	saturated 270 cd/m2 (typ.)	√
	condition		370 cd/m2 (max)
			6 ms (typ.)
	Rise Time
Response time	Decay Time		7 ms (typ.)	√
	Gray to Gray		6 ms (typ.)
Viewing angle			R/L 178(Typ.)	√
			U/D 178(Typ.)
CIE coordinate of White			(0.313, 0.329) +/-	(0.03, √
			0.03)
Display colors			1.07 Billion colors	√	Only HDMI & DP

2.2 Brightness Adjustable Range

Item	Condition	Spec		OK	N.A Remark
Brightness adjustable range At Max. Contrast level &		(Max. brightness value –		√
		Min. brightness value)
	Full-white color pattern		100 cd/
2.3 Acoustical Noise
Item	Condition	Spec		OK	N.A Remark
Acoustical Noise	Front side distance : 30cm	Front side < 23 dB		√
	Back side distance : 4cm	Back side < 28 dB

2.4 Environment

Item	Condition	Spec		OK	N.A Remark
Temperature	Operating	0 ~ 40		√
	Non-operating	-20 ~ +60		√
Humidity	Operating	10 ~ 90%		√	Non-condensing
	Non-operating	5 ~ 90%		√	Non-condensing
Altitude	Operating	0~3,657m (12,000ft)		√	Without packing
	Non-operating	0~12,192m (40,000ft)		√	With packing

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2.5 Transportation

Item	Condition	Spec	OK	N.A Remark
Vibration	Unpacked, Non-Operating	20 Hz, 0.0185 g2/Hz	√
		200 Hz, 0.0185 g2/Hz
		(Duration: 5 min Per AXIS)

Package Test			√
(1)Random Vibration	Package, Non-Operating	1Hz, 0.0001 g2/Hz	√
		4 ~100 Hz, 0.0001 g2/Hz
		200 Hz, 0.001 g2/Hz
		(Equivalent to 1.15 Grms)
		(Duration: 30 min Per
		surface on Z Axis)
(2)Drop	Package, Non-Operating	91 cm Height	√
		(2 corners, 2 edges, 6
		faces)

2.6	Electrostatic Discharge Requirements
Item		Condition	Spec	OK	N.A Remark
Electrostatic Discharge		IEC801-2 standard	Contact: 8KV	√
			Air: 15KV
2.7	Reliability

Item

Condition

Spec

OK

N.A Remark

	MTBF Prediction	Refer to Telcordia	80,000	Hours (goal)	√	Excluding the
		(Bellcore)				LCD, CCFL
	CCFL Life time	at 25 °C 2°C	40,000	Hours (SA)	√	See Note

Note: The lifetime of LED is defined as the time when LED packages continue to operate under the conditions at Ta = 25 ±2 and I= (20)mA (per chip) until the brightness becomes _ 50% of its original value.

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2.8 User’s hardware control definition:

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Service Manual					PA246Q
2.9 OSD control function definition
Item	File Name	Graphic		Related OSD		Comment
1	ButtonTypeC_F_L.png					This will be used in those OSD for CI module. (Suggest : Do not change)
2	ButtonTypeC_F_M.png					This will be used in those OSD for CI module(Suggest : Do not change)
3	ButtonTypeC_F_R.png					This will be used in those OSD for CI module(Suggest : Do not change)
4	ButtonTypeC_N_L.png					This will be used in those OSD for CI module(Suggest : Do not change)
5	ButtonTypeC_N_M.png					This will be used in those OSD for CI module(Suggest : Do not change)
6	ButtonTypeC_N_R.png					This will be used in those OSD for CI module(Suggest : Do not change)
7	grybar_cursor_b_m.png					This will be used in those OSD for CI module(Suggest : Do not change)
8	grybar_cursor_f_m.png					This will be used in those OSD for CI module(Suggest : Do not change)
9	grybar_cursor_n_m.png					This will be used in those OSD for CI module(Suggest : Do not change)
10	shop_mode_img.bmp
11	volume_MUTE.bmp
	volume_on.bmp
12	sound_mode_img.bmp
13	menu_info_notice.bmp

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14

menu_info_notice.bmp menu_button.bmp

menu_lock.bmp menu_lock_hide.bmp menu_time.bmp

15

menu_channel.bmp menu_channel_hide.b mp menu_option.bmp menu_picture.bmp menu_audio.bmp

volume_ball_blue.bmp volume_ball_gray.bmp

16

volume_ball_purple.bm p volume_ball_purple_hid e.bmp

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bmp_bubbles.bmp volume_ball_gray.bmp volume_ball_gray_hide. bmp triangle_down.bmp arrow_down_1.bmp

17arrow_down_2.bmp arrow_up_1.bmp arrow_up_2.bmp arrow_left_1.bmp

arrow_left_2.bmp arrow_right_1.bmp arrow_right_2.bmp

ball_yellow_down.bmp ball_yellow_bg_up.bmp ball_gen_bg_up.bmp ball_gen_bg_down.bmp ball_green_bg_up.bmp ball_green_bg_down.b

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mp ball_blue_bg_up.bmp ball_blue_bg_down.bm p arrow_down_1.bmp arrow_down_2.bmp arrow_up_1.bmp arrow_up_2.bmp arrow_left_1.bmp arrow

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		ball_bg.bmp
		manual_scan_icon.bmp
		bmp_bubbles2.bmp
		ball_blue_bg_up.bmp
		ball_blue_bg_down.bm
		p
		ball_green_bg_down.b	Red (207, 49, 48)
	19	mp	Yellow (254, 203, 92)
		ball_green_bg_up.bmp	Green (166, 174, 122)
		ball_red_bg_up.bmp	Blue(213, 89, 43)
		ball_red_bg_down.bmp
		ball_yellow_bg_up.bmp
		ball_yellow_bg_down.b
		mp
		ball_gen_bg_down.bmp
		ball_gen_bg_

list_Bubble.bmp

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list_Bubble_R.bmp list_bar_M.bmp list_bar_R.bmp

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21 list_Bubble_source.bmp

22 list_Bubble_info.bmp

1. Please refer to Item24 for the title bar on the up. 2. Please refer to Item 19 for the bottom of the OSD

1. Please refer to Item24 for the title bar on the up. 2. Please refer to Item 19 for the bottom of the OSD

* The detailed firmware functions’ specification, please refer to C212 S/W spec. document.

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3 Input/Output Specification
3.1 Power supply
Item	Condition	Spec	OK	N.A	Remark
Input Voltage range	Universal input full range	100-240V, 50/60 Hz	√

	Input Current range	100 ~ 240VAC	< 2 Arms	√
		Normal “On” operation	< 130 Watts	√	LED: White
	Power Consumption	DPMS “Sleep” state	≤ 1 W	√	LED: Orange
		DPMS “Off” state	≤ 1 W	√	LED: Off
		AC Power Switch Off	0 W	√	LED: Off
	Inrush Current	110 VAC	< 30 A (peak)	√	Cold-start
		220 VAC	< 60 A (peak)
	Earth Leakage Current	264 VAC/50Hz	< 3.5 mA	√
	Hi-Pot	1. 1500VAC, 3 sec	Without damage	√	(on-line test)
		2. Ground test: 30A, 3sec	< 0.1 ohm		(in-lab test)
	Power Line Transient	IEC1000-4-4	1KV	√
		IEC1000-4-5 (Surge)	Common: 2KV,	√
			Differential: 1KV
	CCFL operation range	90 ~ 264VAC	6mA ~ 7mA	√	Panel spec.
			(With 100% Duty)
	CCFL Frequency	90 ~ 264VAC	54KHz ~ 58KHz	√	Panel spec.
			(With 100% Duty)
			Color: Black
	Power cord		Length: 1800mm +/-	√
			50mm

3.2 Signal interface
Item	Condition	Spec	OK	N.A Remark

	D-Sub		Color: Black		√	with blue connector
			Length: 1800 mm
	DVI-D		Color: Black		√	with white connector
			Length: 1800 mm
	HDMI		Color: Black		√
			Length: 1800 mm
Signal Cable
	Displayport (DP)		Color: Black		√	DP 1.1 protocol
			Length: 2000 +/- 50mm
	USB 2.0 cable		Color: Black		√
			Length: 1800 +/- 30mm
	Audio		Color: Black		√	with green Jack
			Length: 1800 mm
	15 pin D-sub connector		See Note 1		√	For 15 pin D-sub
	24-pin DVI-D connector		See Note 2		√	For 24-pin DVI-D
Pin assignment
	19-pin HDMI connector		See Note 3		√	For 19-pin HDMI
	20-pin	DisplayPort See Note 4			√	For 20-pin DisplayPort
	connector
	Signal type		Separate analog R G B		√	For 15 pin D-sub
Analog
	Level		700 mV +/- 5% (peak to peak)		√
	Impedance		75 Ohms +/- 2% Ohms		√
Sync	Signal type		Separate H/V-sync		√	For 15 pin D-sub
			(Positive/Negative)
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Service Manual					PA246Q
	Level	Logic High: 2.0V ~ 5.5V	√		Refer to VESA VSIS
		Logic Low: 0V ~ 0.8V (TTL level)			Standard V1R1
	Impedance	Minimum 2.2K (pull down)	√		2.2K for application
	Level	600mV for each differential line	√
Digital input	Impedance	100 Ohm TDR Scan needed for	√
		DVI cable and interface board
	Level	600mV for each differential line	√
HDMI input		100 Ohm differential TDR Scan
	Impedance	needed for HDMI cable and	√
		interface board
	Level	600mV for each differential line	√
DisplayPort input		100 Ohm differential TDR Scan
	Impedance	needed for DisplayPort cable and	√
		interface board

Note 1: The pin assignment of D-sub , DVI , HDMI , DisplayPort connectors are as below: 15 pins D-sub connector (Female):

Pin	Signal Assignment
1	Red video
2	Green video

3Blue video

4Ground

5	Cable-Detect
6	Red Ground
7	Green Ground

8Blue Ground

Pin	Signal Assignment
9	PC5V (+5 volt power)
10	Sync Ground
11	Ground
12	SDA
13	H-Sync (or H+V)
14	V-sync
15	SCL

Note 2: The pin assignment of 24-pin DVI-D connector (Female) is as below,

Pin	Signal Assignment
1	TMDS RX2-

2 TMDS RX2+

3 TMDS Ground

4 TMDS RX4-

5 TMDS RX4+

6DDC Clock

Pin	Signal Assignment
13	TMDS RX3+
14	+5V Power
15	Self-test (Cable detect)
16	Hot Plug Detect
17	TMDS RX0-
18	TMDS RX0+
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Service Manual					PA246Q
	7	DDC Data	19	TMDS Ground
	8	Floating	20	TMDS RX5-
	9	TMDS RX1-	21	TMDS RX5+
	10	TMDS RX1+	22	TMDS Ground
	11	TMDS Ground	23	TMDS Clock+
	12	TMDS RX3-	24	TMDS Clock-

Note 3: Type A (Receptacle) HDMI

HDMI Digital connector pin assignments

PIN	MNEMONIC	SIGNAL
1	TX 2 +	TMDS Data 2 +
2	SHLD 2	TMDS Data 2 Shield
3	TX 2 -	TMDS Data 2 -
4	TX 1 +	TMDS Data 1 +
5	SHLD 1	TMDS Data 1 Shield
6	TX 1 -	TMDS Data 1 -
7	TX 0 +	TMDS Data 0 +
8	SHLD 0	TMDS Data 0 Shield
9	TX 0 -	TMDS Data 0 -
10	TX CLK +	TMDS Clock +
11	TX CLK SHLD	TMDS Clock Shield
12	TX CLK -	TMDS Clock -
13	CEC	Consumer Electronic Control
14	NC	No Connect
15	DDC Clk	DDC Clock
16	DDC Data	DDC Data
17	GND	CED and DDC Ground
18	+5V	+5V Power (from the media box)
19	HPD	Hot Plug Detect

Note 4: The pin assignment of 20-pin DisplayPort connector is as below,

20-pins DisplayPort female

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Service Manual				PA246Q

Pin		Signal Assignment

1Lane0 P

2Ground

3Lane0 N

4Lane1 P

5Ground

6Lane1 N

7Lane2 P

8Ground

9Lane2 N

10 Lane3 P

Pin

Signal Assignment

11Ground

12Lane3 N

13Ground

14EDID WP

15AUX_CH P

16Ground

17AUX_CH N

18Hot Plug Detect

19Return

20DP_PWR

3.3 Input Video Signal Performance Requirement

Item	Condition	Spec	OK	N.A	Remark
Max. support Pixel rate		193.25 MHz	√		DVI only 165 MHz
Max. Resolution		1920 x 1200@60Hz	√
Rise time + Fall time		< 2.509 ns	√		1920x1200 @ 60Hz
(for D-sub input)		(50% of minimum pixel
					(max. support timing)
		clock period)
Settling Time after		< 5% final full-scale value	√		Refer to VESA VSIS
overshoot /undershoot
					Standard V1R1
Overshoot/Undershoot		< 12% of step function	√		Refer to VESA VSIS
		voltage level over the full
					Standard V1R1
		voltage range

3.4 Scan range

Item	Condition	Spec		OK	N.A	Remark
Horizontal		31 ~ 83	KHz	√
Vertical		50 ~ 76	Hz	√		Without Frame buffer

3.5 Plug & Play DDC2B Support

Item

Condition

Spec

OK N.A

Remark

DDC channel type	DDC2B / DDC-CI	√	Refer to Q212 S/W
			spec document to see
			the detailed DDC-CI
			command list.
EDID	Version 1.3	√	Refer to Rebel Q212
			S/W spec document
			to see the detailed
			EDID data definition.

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