Acer AL2103W Schematic

AL2103W (Acer)

L22HCTN-URC(VGA + DVI)

21.6” wide Color TFT LCD Display

Copyright

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.

2

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

3

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

4

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.

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

the display chassis.

2 Operation 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.

3 Before 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

1 Many 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.

2 Before 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

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

2 Keep wires away from high temperature components.

3 Keep 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

5

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

Video Signals

Sync Signals

Input Frequency

Connector

Resolution (Max.)

Recommended mode

Pixel dot clock

Environment

Operating Conditions

RGB Analog (75 ohms, 0.7 / 1.0 Vp-p),

DVI (TMDS, 100 ohms)

Separate Sync / Composite Sync / SOG

Fh = 24 – 82 kHz ; Fv = 50 – 75 Hz

VGA 15-pin Mini D type (detachable cable)

DVI-D (support HDCP / DDC/CI)

Internal Power Adapter, 3-pin plug (CEE22)

1680 x 1050 / 60 Hz

160 MHz (maximum)

Temperature

Non Operating Condition

Temperature

Operating Relative Humidity

Non operating Relative Humidity

Operating Altitude

Non Operating Altitude

Pedestal Tilt

Forward

Backward

Panel Characteristics

Panel Type

Pixel Format

Pixel Pitch

Pixel Configuration

Display Mode

Display Area

5℃ to 35℃

-20℃ to 60℃

20% to 85%.

5% to 95%.

0 to 6,561.68 feet (2000m) .

0 to 40,000 feet (12192m).

5º

20º

CLAA220WA01 (CPT)

1680 (H) x 1050 (V) (1 pixel = R+G+B dot)

0.27675 mm (H) x 0.27675 mm (V) R、G、B vertical stripe

Normally white, TN

464.94 (H) × 290.5875 (V) (21.6-inch diagonal)

6

Faceplate Coating

Hard coating (3H), AG (Haze 25%)

Response Time

Luminance

Contrast Ration

Display Color

Backlight Unit

5ms

300 cd/m² (typical)

1000:1 (typical)

16.7M( 6bits+Hi-FRC)

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)

7

2.1 Model Configuration Table

# Model Panel CPT Scalar IC Scalar board Power board Key

AL2203WQ b

1

(VGA)

AL2203WQ bm

2

(VGA / Audio)

AL2203WQ bd

3

(VGA / DVI)

AL2203WQ bmd

4

(VGA / DVI / Audio)

AL2103W

5

(VGA)

CLAA220WA01

Warehouse code

:032/073

CLAA220WA01

Warehouse code

:032/073

CLAA220WA01

Warehouse code

:032/073

CLAA220WA01

Warehouse code

:032/073

CLAA220WA01

Warehouse code

:032/073

M-Star

TSUMU18B

WJ-LF

M-Star

TSUMU18B

WJ-LF

M-Star

TSUMU58B

WHJ-LF

M-Star

TSUMU58B

WHJ-LF

M-Star

TSUMU18B

WJ-LF

PWB-1195

PWB-1207

PWB-1220

PWB-1207

PWB-1220

PWB-1207

PWB-1220

PWB-1207

PWB-1220

PWB-1207

AL2103W

6

(VGA / DVI)

CLAA220WA01

Warehouse code

:032/073

M-Star

TSUMU58B

WHJ-LF

PWB-1195

PWB-1207

PWB-1220

# Model VGA Cables DVI Cable AUDIO Cable

AL2203WQ b

1

(VGA)

AL2203WQ bm

2

(VGA / Audio)

AL2203WQ bd

3

(VGA / DVI)

AL2203WQ bmd

4

(VGA / DVI / Audio)

AL2103W

5

(VGA)

Wire Ass'y VGA Signal Cable 20276(3+6) L=1800mm D-SUB Core:14.2*28.5*6.35

DVI Signal Cable

UL20276

#30*P+1P+EAM*4

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

L=1800+-50mm

DVI(18+1)Core

DVI Signal Cable

UL20276

#30*P+1P+EAM*4

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

L=1800+-50mm

DVI(18+1)Core

Wire Ass'y Audio Cable 2547#26 Stereo3.5Plug

L=1500mm

Wire Ass'y Audio Cable 2547#26 Stereo3.5Plug

L=1500mm

8

AL2103W

6

(VGA / DVI)

Wire Ass'y VGA Signal Cable 20276(3+6) L=1800mm D-SUB Core:14.2*28.5*6.35

DVI Signal Cable

UL20276

#30*P+1P+EAM*4

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

L=1800+-50mm

DVI(18+1)Core

9

2.2Timing Supported ( Pre-set Timing Table )：

Preset Pixel Format

1 2 3

4

5

6 7 8 9

10

11

12 13 14

15 16 17

60Hz 640 x 480 VGA 31.469//59.94 - - 25.175 67Hz 640 x 480 VGA 35.000//66.667 - - 30.240

72Hz 640 x 480 VGA 37.861//72.809 - - 31.5

75Hz 640 x 480 VGA 37.50//75.00 - - 31.5

70Hz 720 x 400 VGA 31.47//70.08 - + 28.321

56Hz 800 x 600 VESA 35.156//56.250 + + 36.000

60Hz 800 x 600 VESA 37.88//60.32 + + 40.000

72Hz 800 x 600 VESA 48.077//72.188 + + 50.000

75Hz 800 x 600 VESA 46.88//75.00 + + 49.500

75Hz 832 x 624 MAC 49.72//74.55 ± ± 57.283

60Hz 1024 x 768 VESA 48.36//60.00 - - 65.000

70Hz 1024 x 768 VESA 56.476//70.069 - - 75.000

75Hz 1024 x 768 VESA 60.02//75.03 + + 78.750

75Hz 1152 x 864 VESA 68.68//75.06 ± ± 108.000

75Hz 1152 x 870 MAC 68.68//75.06 ± ± 100.000

60Hz 1280 x 720 VESA 44.772//59.855 - + 74.50

60Hz 1280 x 768 VESA 47.776//59.870 - + 79.500

Horz Freq (kHz)

Vert Freq (Hz)

Horz

Polarity

Vert

Polarity

Pixel Clk

(MHz)

18

19 20 21 22 23 24

25

26 27

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

75Hz 1280 x 768 VESA 60.289//74.893 - + 102.250

60Hz 1280 x 800 49.68//60.0 - + 83.462

60Hz 1280x960 VESA 60.00//60.00 ± ± 108.000

60Hz 1280 x 1024 VESA 63.98//60.02 + + 108.000

75Hz 1280 x 1024 VESA 79.98//75.02 + + 135.000

60Hz 1360 x 768 VESA 47.720//59.799 - + 84.75

60Hz 1440 x 900 WXGA+ 55.935//59.887 - + 106.500

75Hz 1440 x 900 WXGA+ 70.635//74.984 - + 136.750

60Hz 1600 x 1200 VESA 75.00//60.00 + + 162.000

60Hz 1680x1050 WSXGA+ 65.29//59.954 - + 146.250

10

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.

11

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.

12

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.

13

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

14

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).

15

4 Connector Definition

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

Number

Signal

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

16

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-

17

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

F/W version

Type of Panel

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 ：

19

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）

-Monitor（Waiting to Re-flash）

- ISP Burning Tool

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

-Print Port Cable

-VGA Cable

PC

Monitor

20

Power Adapter ISP Kit

VGA Cable

2.SOP to upgrade the firmware

Step1 Connect ISP kit between PC and monitor

DC 12V /1A(minimum)

Print Port Cable

Step 2. Execute ISP_Tool File

To PC Printer Port

21

Step3.

Click ”Config”

Step 4.

Click “Auto Detect”

22

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

Step 5.

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

23

Step 6.

Click “Read” button

24