Acer AL2103W Schematic

AL2103W (Acer)

L22HCTN-URC(VGA + DVI)

21.6” wide Color TFT LCD Display

Copyright © 2008 by Acer Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of Acer Corporation.

Disclaimer

Acer makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose. Further, Acer reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Acer to notify any person of such revision or changes.

Trademarks

Acer is a registered trademark of Acer Corporation.

All other trademarks used within this document are the property of their respective owners.

Product disposal at end of product life

The lamp in this product contains mercury. Please dispose of in accordance with local, state or federal laws.

Revision History

Revision	SM Editing Date	ECR Number	Description of Changes	Editor

	TABLE OF CONTENTS
1.	Precautions and Safety Notices ..........................................................................	05
2.	Specification ..........................................................................................................	06
3.	Front Panel Function Control Description ..........................................................	09
4.	Circuit Description................................................................................................	12
5.	Adjusting Procedure.............................................................................................	15
6.	Trouble Shooting Flow Chart ..............................................................................	37
7.	Block Diagrams ....................................................................................................	39
8.	Schematic Diagrams .............................................................................................	41
9. PCB Layout Diagrams .........................................................................................		45
10. PCB Main Board & PI Board List.......................................................................		47

1. Precautions and Safety Notices

1.1 Safety Precautions

Although LCD monitors are displays without high voltage as that in the CRT monitors, the following precautions still should be taken care of.

1Observe all cautions and safety related notes located inside the display cabinet and on the display chassis.

2Operation of these displays outside the cabinet or with the cover removed involves a shock hazard from the display backlight’s inverter. Work on the display should not be attempted by anyone who is not thoroughly familiar with precautions necessary when working on high voltage equipment.

3Before returning a serviced display to the customer, a thorough safety test must be performed to verify that the display is safe to operate without danger or shock.

1.2 Product Safety Notice

1Many electrical and mechanical parts in this chassis provide special visual safety protection. The protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.

2Before replacing any of these components, read the parts list included in this manual carefully. The use of substitute replacement parts, which do not have the same safety characteristics, as specified in the parts list may create shock, fire or other hazards, and hence should be prohibited.

1.3 Service Notes

1When replacing parts or circuit boards, wrap the wires around terminals before soldering.

2Keep wires away from high temperature components.

3Keep cable and their shielding in their original position so as to reduce interference.

Abbreviations and Acronym

DDC	Display Data Channel
DPMS	Display Power Management System
EPA	Environment Protection Agency
ESD	Electrostatic Discharge
I2C-Bus	Inter-IC Bus1
LCD	Liquid Crystal Display
LED	Light Emit Diode
TTL	Transistor-Transistor Logic
VESA	Video Electronics Standards Association

2. Specification

AC Power Input Output	90Vac ~ 264Vac Full Range, 50/60 Hz.
	<1.5A@110V; <0.8A@230V
Power Consumption	LED color is Green: < 49 W
	LED color is Amber: < 2 W
	LED color is Dark: <1 W

Signal Input	RGB Analog (75 ohms, 0.7 / 1.0 Vp-p),
Video Signals	DVI (TMDS, 100 ohms)
Sync Signals	Separate Sync / Composite Sync / SOG
Input Frequency	Fh = 24 – 82 kHz ; Fv = 50 – 75 Hz
Connector	VGA 15-pin Mini D type (detachable cable)
	DVI-D (support HDCP / DDC/CI)
	Internal Power Adapter, 3-pin plug (CEE22)
Resolution (Max.)	1680 x 1050 / 60 Hz
Recommended mode	1680 x 1050 / 60 Hz
Pixel dot clock	160 MHz (maximum)
Environment
Operating Conditions
Temperature	5 to 35
Non Operating Condition
Temperature	-20 to 60
Operating Relative Humidity	20% to 85%.
Non operating Relative Humidity	5% to 95%.
Operating Altitude	0 to 6,561.68 feet (2000m) .
Non Operating Altitude	0 to 40,000 feet (12192m).
Pedestal Tilt
Forward	5º
Backward	20º
Panel Characteristics
Panel Type	CLAA220WA01 (CPT)
Pixel Format	1680 (H) x 1050 (V) (1 pixel = R+G+B dot)
Pixel Pitch	0.27675 mm (H) x 0.27675 mm (V)
Pixel Configuration	R G B vertical stripe
Display Mode	Normally white, TN
Display Area	464.94 (H) × 290.5875 (V) (21.6-inch diagonal)

Faceplate Coating		Hard coating (3H), AG (Haze 25%)
Response Time		5ms
Luminance		300 cd/m² (typical)
Contrast Ration		1000:1 (typical)
Display Color		16.7M( 6bits+Hi-FRC)
Backlight Unit		CCFL, 4 tubes(top × 2/bottom × 2) , Edge light
Viewing Angle(H/V)		H: 170 º / V:160 º

Plug and Play		DDC/2B and DDC/CI
Power Management Complies with	EPA and DPMS
Dimension (W x H x D)		W :509.76 mm (20.1 inch)

		H : 431.55mm (17 inch)

		D : 225mm (8.9 inch)

Monitor Weight		4.5±0.2 Kg(9.90 lbs)

2.1 Model Configuration Table

Model

Panel CPT

Scalar IC

Scalar board

Power board

Key

AL2203WQ b

CLAA220WA01

M-Star

PWB-1195

PWB-1220

Warehouse code

TSUMU18B

PWB-1207

(VGA)

:032/073

WJ-LF

AL2203WQ bm

CLAA220WA01

M-Star

PWB-1195

PWB-1207

PWB-1220

(VGA / Audio)

Warehouse code

TSUMU18B

:032/073

WJ-LF

AL2203WQ bd

CLAA220WA01

M-Star

PWB-1195

PWB-1220

Warehouse code

TSUMU58B

PWB-1207

(VGA / DVI)

:032/073

WHJ-LF

AL2203WQ bmd

CLAA220WA01

M-Star

PWB-1195

PWB-1220

Warehouse code

TSUMU58B

PWB-1207

(VGA / DVI / Audio)

:032/073

WHJ-LF

AL2103W

CLAA220WA01

M-Star

PWB-1195

PWB-1220

Warehouse code

TSUMU18B

PWB-1207

(VGA)

:032/073

WJ-LF

AL2103W

CLAA220WA01

M-Star

PWB-1195

PWB-1220

Warehouse code

TSUMU58B

PWB-1207

(VGA / DVI)

:032/073

WHJ-LF

Model

VGA Cables

DVI Cable

AUDIO Cable

AL2203WQ

Wire Ass'y VGA Signal Cable

(VGA)

20276(3+6)

L=1800mm

D-SUB Core:14.2*28.5*6.35

AL2203WQ

Wire Ass'y VGA Signal Cable

Wire Ass'y Audio Cable

(VGA / Audio)

20276(3+6)

L=1800mm

2547#26 Stereo3.5Plug

D-SUB Core:14.2*28.5*6.35

L=1500mm

Wire Ass'y VGA Signal Cable

DVI Signal Cable

AL2203WQ

20276(3+6)

L=1800mm

UL20276

D-SUB Core:14.2*28.5*6.35

#30*P+1P+EAM*4

(VGA / DVI)

#30*1P#30*3C+AB

L=1800+-50mm

DVI(18+1)Core

Wire Ass'y VGA Signal Cable

DVI Signal Cable

AL2203WQ

bmd

20276(3+6)

L=1800mm

UL20276

Wire Ass'y Audio Cable

D-SUB Core:14.2*28.5*6.35

#30*P+1P+EAM*4

(VGA / DVI / Audio)

#30*1P#30*3C+AB

2547#26 Stereo3.5Plug

L=1500mm

L=1800+-50mm

DVI(18+1)Core

AL2103W

Wire Ass'y VGA Signal Cable

20276(3+6)

L=1800mm

(VGA)

D-SUB Core:14.2*28.5*6.35

		Wire Ass'y VGA Signal Cable		DVI Signal Cable
	AL2103W	20276(3+6)	L=1800mm	UL20276
6	AL2103W	D-SUB Core:14.228.56.35		#30P+1P+EAM4
6	(VGA / DVI)			#301P#303C+AB
	(VGA / DVI)			#301P#303C+AB
				L=1800+-50mm
				DVI(18+1)Core

2.2Timing Supported ( Pre-set Timing Table )

Preset	Pixel Format		Horz Freq (kHz)	Horz	Vert	Pixel Clk
			Vert Freq (Hz)	Polarity	Polarity	(MHz)
1	60Hz 640 x 480	VGA	31.469//59.94	-	-	25.175
2	67Hz 640 x 480	VGA	35.000//66.667	-	-	30.240
3	72Hz 640 x 480	VGA	37.861//72.809	-	-	31.5
4	75Hz 640 x 480	VGA	37.50//75.00	-	-	31.5
5	70Hz 720 x 400	VGA	31.47//70.08	-	+	28.321

6	56Hz 800 x 600	VESA	35.156//56.250	+	+	36.000
7	60Hz 800 x 600	VESA	37.88//60.32	+	+	40.000
8	72Hz 800 x 600	VESA	48.077//72.188	+	+	50.000
9	75Hz 800 x 600	VESA	46.88//75.00	+	+	49.500
10	75Hz 832 x 624	MAC	49.72//74.55	±	±	57.283
11	60Hz 1024 x 768	VESA	48.36//60.00	-	-	65.000
12	70Hz 1024 x 768	VESA	56.476//70.069	-	-	75.000
13	75Hz 1024 x 768	VESA	60.02//75.03	+	+	78.750
14	75Hz 1152 x 864	VESA	68.68//75.06	±	±	108.000
15	75Hz 1152 x 870	MAC	68.68//75.06	±	±	100.000
16	60Hz 1280 x 720	VESA	44.772//59.855	-	+	74.50
17	60Hz 1280 x 768	VESA	47.776//59.870	-	+	79.500
18	75Hz 1280 x 768	VESA	60.289//74.893	-	+	102.250
19	60Hz 1280 x 800		49.68//60.0	-	+	83.462
20	60Hz 1280x960 VESA		60.00//60.00	±	±	108.000
21	60Hz 1280 x 1024	VESA	63.98//60.02	+	+	108.000
22	75Hz 1280 x 1024	VESA	79.98//75.02	+	+	135.000
23	60Hz 1360 x 768	VESA	47.720//59.799	-	+	84.75
24	60Hz 1440 x 900 WXGA+		55.935//59.887	-	+	106.500
25	75Hz 1440 x 900 WXGA+		70.635//74.984	-	+	136.750
26	60Hz 1600 x 1200	VESA	75.00//60.00	+	+	162.000
27	60Hz 1680x1050 WSXGA+		65.29//59.954	-	+	146.250

Mode 1,7,11,16,17,20,21,23,24,26,27 MUST be inspected after repairing

3. FRONT PANEL CONTROLS AND INDICATORS

3-1. User Control Buttons

1.Power Switch:

To turn ON or OFF the power. 2.Power LED:

Lights up to indicate the power is turned ON. 3.Auto Adjust button / 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 to activate the Auto Adjustment function. The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.

5.< / >

1)When OSD menu is in active status, press < or > to select the desired function.

Press < or > to change the settings of the current function.

2)When OSD menu is in off status, press < or > to set the volume level.(Only Audio Model) 4.MENU / ENTER:

Activate OSD menu when OSD is OFF adjustment function when OSD is ON.

3-2 Tilting the Monitor

The monitor has a tilt feature that allows you to tilt the display back and forth to find the most comfortable viewing position. To tilt the display, grasp the sides and push the display back or pull it toward you until it is in the desired position. The display can be tilted 20º backward and 5º forward.

Note: Do not tilt the display by grasping the top edge.

3-3 Connecting the Monitor

To install the monitor to your host system, please follow the steps as given below:

Steps

1. Connect Video Cable

1-1 VGA Cable

a.Make sure both the monitor and computer are powered-OFF.

b.Connect the VGA video cable to the computer.

1-2 Digital Cable

a.Make sure both the monitor and computer are powered-OFF.

b.Connect one end of the 24-pin DVI cable to the back of the monitor and connect the other end to the computer's port.

2.Connect power cord

Connect the power cord to the monitor, then to a properly grounded AC outlet. 3. Power-ON Monitor and Computer

Power-ON the monitor first, then power-ON the computer.

This sequence is very important.

4. If the monitor still does not function properly, please refer to the troubleshooting section to diagnose the problem.

Note: For best monitor performance, it is strongly recommended that you use Auto Configuration to automatically configure your monitor’s settings.

4. Circuit Description

The block diagram of LCD monitor is shown in Appendix A. Following is the brief description of the electronic circuits.

1 Main board Circuit

The circuit diagrams of main board are shown in Appendix B (PWB-1195). The circuit diagrams of key board (PWB-1220) show in Appendix F, and the circuit diagrams of Power Board(PWB-1207) shown in Appendix D respectively.

1.1 Scalar: MST TSUMU58BWHJ

Refer TSUMU58BWHJ (LVDS) schematic. The analog R, G, B input signals are supplied from the analog interface, and then fed into (PWB-1195) U401, (MST TSUMU58BWHJ located in schematic) at pin 28, pin 25,pin 23 for R,G,B signals. These analog R, G, B, Video Signals are converted to their digital forms in (PWB -1195) U401.

1.The H-SYNC and V-SYNC signals come from the analog interface, and fed into (PWB-1195) U401 at pin 32, pin 33.

2.Signal SDA_VGA and SCL_VGA are communication lines between PC and

(PWB-1195) U302 (EDID for analog interface) which is located in the schematic. These two lines are called I2C Bus in related technical literature, which is actually a firmed industry standard.

3.DDCA_SCL, DDC_ASDA are 2 pairs of I2C BUS for DDC/CI controls between PC and (PWB-1195) U401 which are located in the Schematic.

4.The signal Reset is activated while the monitor is power on. It forces (PWB-1195) U401 to enter its reset status. After reset, (PWB-1195) U401 starts its normal operation.

5.(PWB-1195) X401 is a 14.318 MHZ crystal. It is associated circuit components provide the required reference clock for (PWB-1195) U401 normal operation.

6.Key [Auto], [Menu],[-],[+],[], and LED signals are fed to schematic (PWB-1195) CN401

detecting the user key activity.

7. There are two LED drivers, (PWB-1195) Q403 Green and (PWB-1195) Q401Amber, which are controlled by pin 124 and pin 123 of (PWB-1195) U401 respectively.

1.2 Analog Interface: Input Connector

Refer to (PWB-1195) CN301 in schematic.

1.The analog R, G, B video input signals are supplied through the cable which is terminated at (PWB-1195) CN301.These input signals are approximately 0.7 VPP in amplitude and protected by TVS array (PWB-1195) D306. These R, G, B video signals are 75 ohm terminated to ground, via (PWB-1195) R305, R306, and R307, AC coupled via

0.047uF capacitors (PWB-1195) C301, C302 , C303, and finally fed into (PWB-1195) U401, at pin 28, pin 25 and pin 23 respectively. These analog R, G, B video signals are converted to their digital forms in (PWB-1195) U401.

2.The H-SYNC and V-SYNC signals of TTL level in amplitude and also protected by

TVS array (PWB-1195) D307. These two signals are fed into(PWB-1195) U401, at pin 32, pin 33.

3. The signals terminated at (PWB-1195) CN301, at pin 15, pin 12 are also protected by (PWB-1195) D306, and then connected to (PWB-1195) U302, stores the EDID data that serves for the purpose of plug and play functionality.

1.3 Digital Interface: Input Connector

Refer to (PWB-1195) CN302 in schematic.

1.Digitized video and sync information are serialized and sent over three sets of twisted pair wires, one set for red, green and blue data channels. These Digital video signals are transmitted through the cable which is terminated at (PWB-1195) CN302 and are protected by TVS array (PWB-1195) D308, D309 finally fed into (PWB-1195) U401 at pin 9,pin 10,pin 12,pin 13,pin 15,and pin 16 respectively.

2.An additional pair of wires is used to transmit a clock signal for timing also protected by TVS array (PWB-1195) D309. These clock signal is fed into(PWB-1195) U401, at pin 18, pin 19.

3.The signals terminated at (PWB-1195) CN302, at pin 6, pin 7 are protected by TVS array (PWB-1195) D310, and then connected to (PWB-1195) U301, stores the EDID data that serves for the purpose of plug and play functionality.

4.The signals terminated at (PWB-1195) CN302, at pin 16 is also protected by TVS array(PWB-1195) D310 that serves for the purpose of hot plug detect functionality.

1.4 Output interface

VLCD is fed from 5V via Q205.This voltage supply is controlled by control signal, which comes from (PWB-1195) U401 and the digital video signals output from (PWB-1195) U401, are divided into even and odd parts in LVDS format. They are

designated as RXO, and RXE, each of 8 bit width. These signals are fed into LCD panel from (PWB-1195) CN502, with in located in Schematic.

1.5 Power & inverter Interface

For PI board PWB-1207, please refer to Schematic (PWB-1207) P851 is a connector that connects main board and Power inverter board. Main board (PWB-1195) 5V is fed from (PWB-1195) CN3 in Schematic and associated components.Regulator IC (PWB-1195) U202 provides 3.3V , (PWB-1195)U201 provides 1.8V to U401.

2 Power and Inverter Board Circuit

The circuit diagram 2 in 1 of Power & inverter circuit is shown in Appendix D (PWB-1207). The inverter supplies power for backlight for the LCD panel.

3 Key Board Circuit

The circuit diagram of key board circuit is shown in Appendix F (PWB-1220).

4 Connector Definition

4.1 The pin assignment of the 15-pin D-SUB Receptacle connector is listed as below:

Pin	Signal
Number	Assignment
1	Video-Red
2	Video-Green
3	Video-Blue
4	Ground
5	Detect Cable
6	GND-R
7	GND-G
8	GND-B
9	+5V
10	Ground
11	Ground
12	DDC Data
13	H-Sync
14	V-Sync
15	DDC Clock

4.2 The pin assignment of the 24-pin DVI-D Receptacle connector is listed as below:

Pin	Meaning	Pin	Meaning
1	TMDS Data2-	13	TMDS Data3+
2	TMDS Data2+	14	+5V Power
3	TMDS Data 2/4 Shield	15	GND(return for +5V hsync.vsync
4	TMDS Data4-	16	Hot Plug Detect
5	TMDS Data4-	17	TMDS Data0-
6	DDC Clock	18	TMDS Data0+
7	DDC Data	19	TMDS Data 0/5
8	Analogue Vertical Sync	20	TMDS Data5-
9	TMDS Data1-	21	TMDS Data5+
10	TMDS Data1+	22	TMDS Clock Shield
11	TMDS Data 1/3 Shield	23	TMDS Clock+
12	TMDS Data3-	24	DDC TMDS Clock-

5. Adjusting Procedure.

Factory Mode Settings

5-1. Burn-in Mode

1.Do not connect any input source

2.Pressing button [ Menu ] then [] power on

5-2. Enter into the factory setting:

1.Switch off the monitor, press and hold the [ Menu ] key then [] power on again

2.Press the [ Menu ] key to open OSD(OSD should be on the top left side of display), then press the [<] key to select F of OSD and press [ Menu ] key into the factory OSD(factory OSD in blue background is on the top left side of display)

3.Check the F/W version type of panel type of scaler before execute AUTO COLOR or adjusting color temperature.

4.Re-power on again, the monitor will reverse to normal operating state.

Type of scaler

Type of Panel

F/W version		18

5-3. Auto-Color Adjustment (Factory Mode & VGA Input Only)

1.Enter the factory mode.

2.Apply a 65K Hz (1680x1050 / 60 Hz) signal with five white-block pattern. .( CHROMA 2250 or equivalent ; Pattern #42)

3.Press “Auto Color” item of factory OSD to run Auto-Color Adjustment

5-4. White Balance Adjustment (Factory mode)

Please follow the steps to adjust White Balance of this monitor

1.Warm up the LCD monitor at least 30 minutes before the “Auto-Color Adjustment” proceeds

2.Enter the factory mode

3.Apply a 65K Hz (1680x1050 / 60 Hz) signal with five squre white pattern.. ( CHROMA 2250 Pattern #42)

4.Execute the auto-color process first before adjusting the white balance

5.Press the “Reset “item of factory OSD to recall default Contrast/Brightness Value.

6.Use a color analyzer to set the Luminance Color temperature to meet below data.

Color Temperature

Warm

x = 0.313 ± 0.020

y = 0.329 ± 0.020 Y 160cd/m2

Cool

x = 0.283 ± 0.020 y = 0.298 ± 0.020

Adjusting by hand if Color Temperature is out of range.

7.Apply 1024x768 / 72 Hz then press the “Reset “item of factory OSD to initial EEPROM for all timing modes.

8.Power off to end white balance adjustment.

5-5. Firmware Upgrade Procedure

1. Equipment Request

-PC Personal Computer -MonitorWaiting to Re-flash

- ISP Burning Tool

-Power Adapter Input: AC 100v~240v Output: DC 12v

-Print Port Cable -VGA Cable

Monitor

ISP Kit

Power Adapter

VGA Cable

Print Port Cable

2.SOP to upgrade the firmware

Step1 Connect ISP kit between PC and monitor

DC 12V /1A(minimum)

To PC Printer Port

Step 2. Execute ISP_Tool File

Step3.

Click ”Config”

Step 4.

Click “Auto Detect”

And then “OK” shows up beside the Auto Detect” button

Step 5.

Click “Connect” and then a dialog window pops up.

Step 6.

Click “Read” button

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