Acer AL1913c Service Guide
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Table of Contents

Chapter 1 Monitor Features . . 8
1.1 Test Conditions . 8 1.2 Features . . 8 1.3 LCD Panel Specification . 9
Chapter 2 OPERATING INSTRUCTIONS . . 12
2.1 Function Name 12 2.2 OSD Menu Description. 14 2.3 OSD Control. 15 2.4 OSD Menu Screen . . .15 2.5 OSD Function Definition. . 17 2.6 Plug and Play . .18 2.7 Power Saver . .18
Chapter 3 Machine Disassembly and Assembly . . 19
3.1 Machine Disassembly 19 3.2 Machine Assembly . . 22
Chapter 4 Troubleshooting . . . 25
4.1 Abnormal display Troubleshooting 25 4.2 Abnormal (On/Off, LCD Display, K/B) Troubleshooting.27 4.3 Abnormal (BIOS, OSD, Other Display) Troubleshooting.28 4.4 Audio Abnormal . .29
Chapter 5 Connector Information . . . 30
5.1 Function Block Diagram . 5.2 Connector Location . . 5.3 D-sub Mini 15Pin Connector . . 5.4 DVI-D 24Pin Connector . . . 5.5 DC Connector . . . . 5.6 Audio Connector . . 5.7 Main Board Pin Assignment Introduction . . 32
Chapter 6 FRU(Field Replaceable Unit . . 37 Chapter 7 Schematic Diagram . . . 41

Monitor Features

Chapter 1

1.1 Test Conditions

Item Temperature Humidity AC input voltage Brightness Contrast Resolution setting Color temperature Measuring instrument Others
Condition Normal room temperature () 50 10% 100V 2V, 120 2V, 60Hz / 240 2V, 50Hz Maximum with OSD setting Middle with OSD setting 1280 x 1024 @60HZ With OSD setting Topcon luminance colorimeter BM-5A or equivalent Before measuring, Auto Adjust & Auto Balance must be done in advance

1.2 Features

l l l l l l l l l l l l
19 SXGA TFT LCD Panel MVA Mode Liquid Crystal D-SUB/ DVI-D Input Audio Function Support to 75Hz Refresh Rate Support VESA-DCC 2B plug & play function Support VESA-DPMS & DVI DMPM Power Management Function Super Wide Viewing Angle High Brightness & Contrast Ratio High Brightness & Contrast Angular Dependent Fast LC Response Time Light Weight
1.3 LCD panel Specification

Technical Specifications

Panel Dimension Max. Resolution Max. Pixel Diagonal 481.9mm (19 inch) LCD display 1,280 x 1,024/ S XGA Up to 16.2M true color Horizontal 0.294mm x Vertical 0.294mm 300 cd/m 800 : 1 23ms Horizontal 170 / Vertical 170 Horizontal 376.32mm x Vertical 301.056mm Simulated video frequency: 0.7 Vpp, 75 (separate SYNC and composite SYNC) Horizontal 30kHz~82kHz x Vertical 56Hz ~76 Hz 135MHz D-Sub 15 PIN (VESA) / DVI-D (Optional) Phone Jack, d=3.5mm (Optional) AC100~240Volts, 50/60Hz 65W / Standby 3W 5 ~ 35 (operation)/ -20 ~ 55 (storage)

LCD Panel

(Back Light Source)
Pixel Span Brightness Contrast LC Time Response
Visual Angle Effective Display Signal Mode Input Signal SYNC Frequency Max. Pixel Clock Image Input Terminal Audio Power Transformer Power Consumption Environmental Conditions Temperature Humidity

20% ~ 80% (operation)/ 20% ~ 85% (storage) 427 mm x 196mm x 429mm 4.5 kg TCO99;UL/CUL;TV-GS;CE/LVD;TVERGO;CB;CCC;FCC-B; VCCI-B;CE/EMC;C-Tick; BSMI; ISO 13406-2;EPA; PCT
Actual Dimension (W x D x H) Net Weight Safety Standard
Definition of Viewing Angle (x, y): Normal x = y = 0

yX- = 90 xx-

y+ 12 oclock direction y+ = 90

6 oclock y- = 90

X+ = 90
Definition of Contrast Ratio (CR): The contrast ratio can be calculated by the following expression and figure below. Contrast Ratio (CR) = L255 / L0 L255: Luminance of gray level 255 L 0: Luminance of gray level 0 CR = CR (5) CR (X) is corresponding to the Contrast Ratio of the point X at Figure in Note (5). Definition of luminance measured points and Brightness Uniformity:

Horizontal Line Number

Vertical Line Number

2 X : test point

X=1 to 5

Active area

Horizontal Line Number [pixel]
Luminance of center point: L=L(5) Brightness Uniformity Measurement points: Five specified points 1-5 Formula: Maximum [L (1), L (2), L (3), L (4), L (5)]/Minimum [L (1), L (2), L (3), L (4), L (5)] (3) Definition of Response Time (TR , TF ):

Gray Level 255

100% 90%

Optical Response 10%

Gray Level 0
Measurement Setup: The LCD module should be stabilized at given temperature for 20 minutes to avoid abrupt temperature change during measuring. In order to stabilize the luminance, the measurement should be executed after lighting Backlight for 20 minutes in a windless room.
LCD Module LCD Panel Center of the Screen Photometer (TOPCON BM-5A)

Field of View = 2

Light Shield Room (Ambient Luminance < 2 lux)

500 mm

OPERATING INSTRUCTIONS

Chapter 2

2.1 Function Name

2.1.1 Front

Name Power Switch LED Indicator Power On/Off Green Orange MENU > < AUTO Speaker OSD control MENU button

Descriptions

Normal operation Power management
Right selection/ Volume button (AL1714m/AL1714bm) Left selection/ Volume button (AL1714m/AL1714bm) Adjust Clock, Phase, H Position and V Position automatically 2.5W x 2

2.1.2 Back

No. 12
Name D-Sub DVI Audio IN DC-In Lock hole
Descriptions D-sub mini 15pin Connector DVI-D 24pin Connector Phone Jack 3.5 DC Power Jack, d=3.0mm Kensington
2.2 OSD Menu Description 1. POWER : Press this key to control power ON/OFF of the Monitor. Green: normal display. Orange flicker: no signal input. Orange: power off. 2. MENU : Press this button to enter OSD. Press it again to exit OSD.
3. >: Press this button for selection or adjustment when OSD is shown. Press this button and click > to plus volume. 4. <: Press this button for selection or adjustment when OSD is shown. Press this button and click < to minus volume. 5. AUTO: Press this button to exit the manual when OSD is shown. Press this button for the display to optimize the position, phase and clock pulse automatically when OSD is not shown.
2.3 OSD Control 1. Click MENU to display the OSD window as shown in the following figure. 2. Click < or > to select the function to be adjusted as shown in the following figure. 3. Click the MENU to select the function to be adjusted. 4. Click < or > to change current settings. 5. To exit OSD, select to close the OSD window and save changes. To change other settings, repeat steps 2-4.

2.4 OSD Menu Screen

Bright/Contract Adjustment Phase/Clock pulse Adjustment Horizontal/Vertical Adjustment Color Temp. Adjustment Language Selection
OSD Setting Auto Adjustment Message Restore Exit
The OSD disappears several seconds after you stop pressing the buttons while performing an adjustment. Any changes are automatically saved in the memory when the OSD disappears. Turning off the power should be avoided while using the menu. Adjustments for clock, phase and positions are saved for each signal timing. Except for these adjustments, all other adjustments have only one setting which applies to all signal timings. The color will change from white to pink while the function is selected.
2.5 OSD Function Definition
Primary Directory Symbo Secondary Directory Symbol Secondary Directory Items Contrast Brightness Phase Clock Pulse Horizontal Vertical N/A N/A Warm Color Temp. Cold Color Temp. User Definition/Red User Definition/Green User Definition/Blue N/A N/A N/A N/A N/A N/A N/A N/A Horizontal Vertical OSD Time Display N/A Auto Adjustment Move OSD left and right Move OSD up and down Adjust OSD time display settings Set up horizontal, vertical, sequence and focus automatically (for analog input only) Select the input source you want (for DVI Input only) Deutsch Franais Espaol Italiano ? ? ? ? Select the language you want English Adjust red/green/blue gain Description

Adjust the contrast between the foreground and background of an image on the screen Adjust the background brightness of the screen Adjust the focus of the image (for analog input adjustment only) Adjust the clock pulse of the image (for analog input adjustment only) Move the image left and right on the screen (for analog input adjustment only) Move the image up and down on the screen (for analog input adjustment only) Set up the color temp. to be warm white color Set up the color temp. to be cold white color

Analog Digital

Message
Display resolution, H/V frequency and the input port used for current input timing function Restore to factory settings

Restore

Close the OSD window and save changes
2.6 Plug and Play u u u The new VESA Plug and Play function is used which eliminates the complicated and time-consuming installation process. You can use the Plug and Play system without encountering usual installation problems. Your computer system can easily identify and automatically adjust the monitor. The LCD Monitor uses Display Data Channel (DDC) to send Extended Display Identification Data (EDID) to the computer system, so the computer system can be set to monitor auto adjust.
2.7 Power Saver u u Power control system, also called (Power Saver), is installed inside the LCD Monitor. If the monitor has not been used for a certain period of time, the system will turn the monitor to low voltage mode to save power. Slight moving or any click will return to the original image. The VGA card inside the computer handles Power Saver. You can use computer software to set the function. The LCD Monitor is compatible with EPA ENERGY STAR and N TEK if used with a VESA DPMS computer. To save power, turn off the power of the LCD monitor when not in use.
MACHINE DISASSEMBLY AND ASSEMBLY
3.1 Disassembly Procedures

Chapter 3

Picture

Description

Push the hooks and stand bottom away

Remove Hinge Cover

Loosen and remove 4 screws

Remove Stand Assy

Loose and remove 5 screws.
Separate Bezel hooks to take Bezel and Rear Cover apart.

Lift up Rear Cover

Loose and remove 2 screws
Loose and remove 3 screws

Remove FFC

Remove the Cover of X-PCB

Remove Power PCBA

Remove 2 pieces of FFC from AD PCBA
Loose and remove 4 screws

Remove AD PCBA

Lift up LCD module and remove bezel.

Remove FFC.

Separate both Audio Cable.
Loose and remove 2 screws.

Take OSD PCBA apart

3.2 Assembly Procedures Place OSD PCBA.

Fasten 2 screws

Insert Audit Cable to connectors of OSD PCBA

Bezel assembly complete.

Insert FFC.

Place LCD module.

Insert new AD PCBA
Fasten 4 fixed screws of AD PCBA
Insert 2 pieces of FFC to AD PCBA

. Insert new Power PCBA

Fasten 3 fixed screws of Power PCBA
Join the cover hooks of X-PCB

Fasten 3 screws

Insert FFC

Place Rear Cover

Join hooks of Rear Cover with Bezel

Fasten 5 screws

Place Stand Assy.

Fasten 4 screws

Insert Stand Cover

Have the hook latched

Troubleshooting

Chapter 4

4.1 Abnormal Display Troubleshooting
4.2 Abnormal (ON/OFF, LCD display, Keyboard ) Troubleshooting
4.3 Abnormal (BIOS, OSD, Other Display ) Troubleshooting
4.4 Audio Abnormal Troubleshooting

Connector Information

5.1 Function Block Diagram

Chapter 5

Speaker Audio Audio In

OSD Key

3.3V DVI-D Digital Video D-sub Analog Video DC/D DC-19V DC -19V Inverter Backlight Main Signal LCD

5.2 Connector Location

5.3 D-sub Mini 15pin Connector

Pin No. 7 8

Pin Function Red video input Green video input Blue video input NC Ground Red video ground Green video ground Blue video ground

Pin No. 15 NC Ground

Pin Function
No connection DDC data Horizontal sync (Composite sync) Vertical sync DDC clock
5.4 DVI-D 24pin Connector

Pin No. 11 12

Pin Function T.M.D.S Data 2T.M.D.S Data 2+ T.M.D.S Data 2 Ground NC NC Clock line (SCL) Data line (SDA) NC T.M.D.S Data 1T.M.D.S Data 1+ T.M.D.S Data 1 Ground NC

Pin No. NC NC Ground

Hot Plug Detect T.M.D.S Data 0T.M.D.S Data 0+ T.M.D.S Data 0 Ground NC NC T.M.D.S Clock Ground T.M.D.S Clock+ T.M.D.S Clock-

5.5 DC Connector

DC Power Jack, d=3.0mm
5.6 Audio Connector (Optional)

Phone Jack, d=3.5mm

5.7 Main Board Pin Assignment Introduction

5.7.1 CN1 Pin assignment

Symbol INV_ADJ INV_ON/OFF GND GND GND VIN_19V VIN_19V VIN_19V
Description Inverter enable Brightness Adjustment Ground Ground Ground Input source Input source Input source

5.7.2 CN2 Pin assignment

Pin No. 15
Symbol GND GND GND AUDIO/LAUDIO/L+ AUDIO/RAUDIO/R+ PWR_SW LED_O LED_G KEY_UP KEY_DOWN MENU AUTO_ADJ SOURCE_SEL
Description GROUND GROUND GROUND AUDIO OUTPUT AUDIO OUTPUT AUDIO OUTPUT AUDIO OUTPUT POWER KEY ORANGE LED GREEN LED UP KEY DOWN KEY MENU KEY AUTO ADJUSTMENT INPUT SOURCE SELECTION

5.7.3 CN3 Pin assignment

Pin No. 31 32
Symbol XA0 OE CKV GND VGD VGD PANEL_VGL STV PANEL_VGL PANEL_VGL GND PANEL_VGH PANEL_VGH VCOM EB0N EB0P EB1N EB1P EB2N EB2P GND POL STB GND ECLKN ECLKP GND EG0N EG0P EG1N EG1P EG2N
Description SCAN DATA OUTPUT ENABLE SCAN IC CLOCK GROUND SCAN IC VOLTAGE SCAN IC VOLTAGE PANEL DRIVING VOLTAGE SCAN IC START PULSE PANEL DRIVING VOLTAGE PANEL DRIVING VOLTAGE GROUND PANEL DRIVING VOLTAGE PANEL DRIVING VOLTAGE PANEL COMMOM VOLTAGE EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT GROUND POLARITH INVERTING DATA LATCH GROUND EVEN PATH CLOCK EVEN PATH CLOCK GROUND EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT
EG2P GND ER0N ER0P ER1N ER1P ER2N ER2P ESTH GND VSD VSD VSD
EVEN PATH BLUE DATA BIT GROUND EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH BLUE DATA BIT EVEN PATH RED DATA BIT GROUND DATA IC VOLTAGE DATA IC VOLTAGE DATA IC VOLTAGE

5.7.4 CN4 Pin assignment

Pin No. 21 22
Symbol VCOM VCOM VCOM GND GND OB0N OB0P OB1N OB1P OB2N OB2P GND OCLKN OCLKP GND GMA1 GMA2 GMA3 GMA4 GMA5 VSA VSA
Description PANEL COMMOM VOLTAGE PANEL COMMOM VOLTAGE PANEL COMMOM VOLTAGE GROUND GROUND ODD PATH BLUE DATA BIT ODD PATH BLUE DATA BIT ODD PATH BLUE DATA BIT ODD PATH BLUE DATA BIT ODD PATH BLUE DATA BIT ODD PATH BLUE DATA BIT GROUND ODD PATH CLOCK ODD PATH CLOCK GROUND GAMMA VOLTAGE GAMMA VOLTAGE GAMMA VOLTAGE GAMMA VOLTAGE GAMMA VOLTAGE DATA IC VOLTAGE DATA IC VOLTAGE

VSA VSA VSA GMA6 GMA7 GMA8 GMA9 GMA10 GND OG0N OG0P OG1N OG1P OG2N OG2P GND OR0N OR0P OR1N OR1P OR2N OG2P OSTH
DATA IC VOLTAGE DATA IC VOLTAGE DATA IC VOLTAGE GAMMA VOLTAGE GAMMA VOLTAGE GAMMA VOLTAGE GAMMA VOLTAGE GAMMA VOLTAGE GROUND ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT GROUND ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH GREEN DATA BIT ODD PATH STAR PULSE
FRU (Field Replaceable Unit) List
Part List Picture Partname Description

Adapter (Black)

Chapter 6

Vendor Part No.

2719065193
ADAPTER 3.42A 65W 3PIN BLACK
FUNCTION PCBA FOR A190E2 BUTTON BOARD

35A19K020 5

INVERTER INVERTER BOARD BOARD TWS-444-983

2714000022

Main Board AL1913 MAINBOARD

35A19S020 3

FFC AD3241900006 OSD,15PIN,PITCH1.0M M,A190E2-H04
FFC_X, 3241902003 A190E2,45PIN,60X23M M,PITCH=0.5MM

MONITOR CABLE (BLACK)

MONITOR 32F3018003 CABLE,180CM, BLACK

AUDIO CABLE (BLACK)

AUDIO CABLE,180CM,BLACK

32F2818004

Part name Description

STAND BASE ABS, Black,

40A1992212

LCD FRONT BEZEL

Bezel Assy, W/SPK, BLACK

40A1922913

LCD BACK Rear Assy, COVER W/AUDIO,BLACK

40A1992208

LCD STAND STAND ASSY,BLACK NECK

40A1992211

Hinge Cover COVER HINGE,BLACK 40A1992206
MAINBOAR COVER AD,A190E2 D COVER

41A1999106

Schematic Diagram

Chapter 7

Main Board

FIELD SERVICE BULLETIN

ACER CLASSIFIED

ACER INTERNAL DATA

Property of ACER ONLY

DATE: 10/19/05

NUMBER: mn_017
SUBJECT: Upgrade the inverter any time the monitor is sent in for service (silent service). AFFECTS: AL1913W (ET.L4309.005) manufacturing date code 522, 524, and 526. ISSUE: An issue existed with the AL1913W monitor (see FSB mn_016). Any time an affected monitor is sent in for service, it must be verified to have an upgraded inverter before returning to the customer or stock. SOLUTION: Approx 3000 of the possibly affected system have been reworked by the vendor. A small blue or black dot was put on one of the high voltage connectors on the reworked boards. In the picture below it is on the middle connector. AL1913 monitors with these inverters have already been upgraded.
If the inverter does not have dot on one of the connectors, replace the inverter with the appropriate service spare from stock.
ACTION REQUIRED: Inspect all the affected monitors to confirm the inverter has been upgraded before returning product to the customer or stock. Service recommends, that if the inverter has been replaced, the tech should apply a small blue or black dot (with a permanent marker) to the the serial number label of the monitor and the box (if available). Note: the manufacturer did not add the dot to the serial number label on the 3000 reworked monitors. However, Service Engineering recommends that the repair tech adds the small ink dot to the serial number labels. SPECIAL TOOLS None PARTS REQUIRED 55.L43VG.002 INVERTER BOARD MIT70007.50,VER:1,5MA,2970 V ORIGINATOR: Ed Stoeckle