Acer AL718 Manual de usuario

Acer AL718 Service Guide

CONTENTS

WARNING

SAFETY PRECAUTIONS

1. DIMENSIONS

2. GENERAL INFORMATION

3. SPECIFICATIONS

4. THEORY OF OPERATION

5. EXPLORED DRAWING & DISASSEMBLY INSTRUCTIONS

6. CONTROL LOCATION

7. NECESSARY EQUIPMENT LIST

8. BLOCK DIAGRAM

9. CONDUCTOR VIEW

10. SCHEMATIC DIAGRAM

11. TROUBLE SHOOTING HINTS

12. BOM LIST

13. REPLACEMENT PARTS

14. SPARE PARTS LIST

AL718

WARNING

This service information is designed for experienced repair technicians only and is not

designd for use by the general public

It does not contain warnings or cautions to advise non-technical individuals of

potential dangers in attempting to service a product.

Products powered by electricity should be serviced or repaired only by experienced

professional technicians.

Any attempt to service or repair the product or products dealt within this service

information by anyone else could result in serious injury or death.

AL718 A-1

SAFETY PRECAUTIONS

1. CAUTION: 4-6 Voltage measured must not exceed 1.5 vo

No modification of any circuit should be attempted. RMS, from any exposed metallic part to t

Service work should only be performed after you ground. A leakage current tester may be

are throughly familiar with all of the following safety used in the above hot check, in which case

checks and servicing guide lines. any circuit measured must not exceed 1.0

miliamp. In the case of a measurement

2. SAFETY CHECK exceeding the 1.0 miliamp value, a rework

Care should be taken while servicing this LCD required to eliminate the chance of a shock

display. Because of the high voltage used in the hazard.

inverter circuit. These voltage are exposed in such

areas as the associated transfomer circuits.

3. POWER SUPPLY REQUIREMENTS

The external powr converter for this display

utilizes AC and DC cords , AC cord is

detachable , but DC cord is permanently

attached . Any attempt to replace another

adapter could result in serious problem on the

display.

4. LEAKAGE CURRENT HOT CHECK

4-1 Plug the AC cord directly into the AC outlet.

Do not use an isolation transformer during this

check.

4-2 Connect a 1500 ohm , 10 watt resistor ,

paralleled by a 0.15uF capacitor between each

metallic part and a good earth ground.

4-3 Use an AC voltmeter with 1000 ohm / volt or

more sensitivity and measure the AC voltage

across the combination 1500 ohm resistor

and 0.15uF capacitor.

4-4 Move the resistor connection to each exposed

metallic part and measure the voltage.

4-5 Reverse the polarity of the AC plug in the AC

outlet and repeat the above measurement.

To Metal Parts

AC VOLTMETER

1500 10W

0.15u

Earth Ground

AL718 B-1

1. DIMENSIONS

1.1 Front View

unit : mm

1.2 Real View : unit : mm

AL718

1-1

1.3 Top View : unit : mm

1.4 Side View : unit : mm

AL718

1-2

2. GENERAL INFORMATION

1. OUTLINE 2.8 Superior display performance

This monitor is 17" multi-scan color LCD display High contrast : 450 : 1(typ), 300:1 (min)

with the following features. High brightness : 300 cd / m2(Typical)

OSD ( on screen display ) control allows easy user Wide view angle : 150 / 125 degrees (H/V)

adjustment.

Power saving function, which helps saving energy , 2.9 Special function

is also one of the highlights of this model. VESA DDC2B ( Display Data Channel )

Compatible

2. FEATURES

2.1 Power Saving

Built in Power Saving function based on VESA-

DMPS standard. Power energy shall be saved

by controlling the circuit in accordance with

power saving signal from computer.

2.2 OSD (on screen display) function

OSD ( 5 Languages ) function is excellent and

new man-machine interface.

Anyone is able to set up the picture as he like

through OSD menu.

2.3 Self Test function

Self Testing picture comes out by pushing special

key in the case of no-connection with computer

or power saving operation.

This function shows if monitor is alive or not and

can be used for self aging test.

2.4 Ergonomic design

Low emission design to meet MPR II and TCO99

2.5 Multi scan with digital technology

8 bit micro controller controls the circuit

operation to meet with wide range signal of Fh=

30~81 kHz and Fv= 56~75 Hz. So VGA640x400,

VGA640x480, SVGA800x600, XGA 1024x768,

SXGA 1280x1024 mode are applicable.

2.6 Factory preset

The product has 26 memory mode in total .

16 modes are preset and 10 modes are user

definable.

2.7 Fine dot pitch

LCD panel with a fine dot pitch

( Horizontal : 0.264 mm / Vertical : 0.264 mm)

AL718 2-1

3. SPECIFICATION

1. Outline 4.2 Audio : Line-in receptacle

1.1 LED POWER SW, AUTO, MANU, LEFT

and RIGHT key are located on the front panel.

1.2 Video signal cable and audio line-in receptacle

are located on the back side of the cabinet.

1.3 OSD menu includes the following function.

CONTRAST BRIGHTNESS H.POSITION

V.POSITION COLOR-TEMPERATURE 4.3 Video signal connector 15P Mini D-Sub

CLOCK PHASE LANGUAGE connector x 1

VOLUME POWER-ON-RECALL

1.4 VOLUME can be controlled with LEFT /

RIGHT key.

2. MECHANICAL SPECIFICATIONS

2.1 Dimension Height : 393 mm ( 15.5")

Width : 375 mm ( 14.8")

Depth : 182 mm ( 7.2")

2.2 Net Weight :4.24kg ( 9.35 lbs)

2.3 Maximum Viewable Area : Diagonal 432 mm

(17")

3. PANEL SPECIFICATIONS

4. CONNECTORS

4.1 AC power cord : CEE22 typed connector

4.2 Audio cable

CN6

DB15HD

16 17

PHONEJACK STEREO

MNEMO SIGNA

1 RV Red Video

2 GV Green Video

3 BV Blue Video

one

5 GND Ground

(

DDC return

)

6 RG Red GND

7 GG Green GND

8 BG Blue GND

9 +5V + 5V

(

for DDC

)

10 SG S

nc GND

one

12 SDA DDC Data

13 HS Horizontal S

14 VS Vertical S

15 SCL DDC Cloc

Part No.

D17EL07

Driver bit of

anel 8 bit

Contrast ratio 450:1 t

yp,

300:1min.

Bri

htness 300 cd/ m2

(

py),

Pixel

itch 0.264 mm

Res

onse time < 20 ms

(

Tr+Tf

)

View an

le 75/75/65/60 de

rees

Color coordinate x=0.313

=0.329

AL718 3-1

5. ELECTRICAL SPECIFICATIONS 5.4 Preset Timings

5.1 Standard conditions

5.2 POWER

5.2.1 Power supply

5.2.2 Power Management

5.5 Signal level and input impedance

5.5.1 Video Signal level

This LCD display is adjusted at the factor

5.3 Acceptable timing using 0,7 Vp-p Video signal.

If your timing is within following specification, 5.5.2 Sync Signal level

this LCD display can automatically function with H/V Separate : TTL level

a certain position. 5.5.3 Input impedance

Horizontal: Sync frequency : 30~81 kHz Video input : 75 ohms

Vertical : Sync frequency : 56~75Hz Sync input : > 1 k ohms

Display area 338 x 270 mm

Video signal level 0.7 Vpp

Contrast Max.

Brightness Max.

Ambient 20 +/- 5 C degrees

Input voltage AC 120,60Hz

Warming up time > 30 minutes

Display mode 1280 x 1024

State Power Indicator

On < 50Watts Green

Standby < 1 Watts Amber

Off < 1 Watts

Input voltage 90~240 Volts

Power frequency 50 / 60 Hz , +/-

Input current < 2 Arms

Inrush current < 90A

Power < 50 Watts

# mode Resolution Hz (KHz

1 IBM VGA 720 x 400 70 31.46

2 VESA 640 x 480 60 31.46

MAC 13

”

640 x 480

4 VESA 640 x 480 72 37.86

VESA

640 x 480

37 5

6 VESA 800 x 600 56 35.16

7 VESA 800 x 600 60 37.87

8 VESA 800 x 600 72 48.07

9 VESA 800 x 600 75 46.87

1MAC 16” 832 x 624 75 49.72

1VESA 1024 x 768 60 48.36

1VESA 1024 x 768 70 56.48

1VESA 1024 x 768 75 60.02

1VESA 1152 x 864 75 67.5

1VESA 1280 x 1024 60 63.98

1VESA 1280 x 1024 75 79.97

AL718 3-2

5.6 Display Area 6. ENVIRONMENTS

Display area : 338 x 270 mm

5.7 General performance

5.7.1 Maximum pixel clock

135 MHz

5.7.2 Maximum luminance

* Non-condensation

7. REGULATORY STANDARDS

7.1 Safety standards

This monitor applies to various safty & EMI

standards May refer to the logo label

7.2 EMC standards

FCC part 15,subpart B , class-B

5.7.3 Brightness variation CE marking

8. OTHERS

TUV (Rheinland)

ISO13406-II pixel fault class 2

TCO99

9. P0WER CORD

Northern Hemisphere Version : UL / CSA

approved power cord.

European : VDE approved power cord.

10. SIGNAL CABLE

5.7.4 Contrast ratio (CR) Signal cable with Mini D-Sub 15P connectors

at both ends.

Length : 1.8 meter.

11. RELIABILITY

11.1 MTBF for completed unit without LCD

> 50,000 hours (demonstrated MTBF)

11.2 MTBF for LCD

The brightness is still more than 50% of the

original brightness after 30,000 hours (min.)

Operation Storage and

Shipment

Temperat

ure

0 ~ 40 C -20 ~ +60 C

Humidity 5 ~ 90 % * 5 ~ 90 % *

Altitude 3000m 12000m

Value 250 cd / m2 at center of the

display area ,Specified by

6500K + 8 MPCD

Conditions Display image : Full white

Brightness : Maximum

Contrast : Maximum

Value 75 % Variation = C / A x 100

Conditions Display image: Full white

Brightness : Maximum

Contrast : Maximum

A: Luminance at center position

C: Luminance at position of

lowest brightness

Value CR= B / A

Conditions Contrast : Maximum

B: Full white pattern

Brightness : min

A: Full black pattern

Brightness : max

AL718 3-3

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