Acer D240H Manuel utilisateur

Acer Acer –LCD-D240H

Service Manual

LCD MonitorAcer D240H

Table of Contents

Important Safety Notice .........................................................................................02

01 Product Specification ..........................................................................................03

02 Flat Panel Specification .......................................................................................15

03 Exploded Diagram ..............................................................................................36

04 Troubleshooting ....................................................................................................37

05 Spare Parts List ...................................................................................................42

06 Schematics and Layouts.......................................................................................43

07 Assembly and Disassembly ................................................................................46

Appendix : User’s manual

This manual may not, in whole or in part, be copied, Photocopied, reproduced, translated, or converted to any

electronic or machine readable form without prior written permission of InnoLux Tech. Corp. Ltd.

Acer D240H Service Manual

Acer Acer –LCD-D240H

Important Safety Notice

1. Safety precautions

This monitor is manufactured and tested on a ground principle that a user’s safety comes first.

However, improper used or installation may cause damage to the monitor as well as to the user.

Warning:

zThis monitor should be operated only at the correct power sources indicated on the label on the

rear of the monitor. If you’re unsure of the power supply in you residence, consult your local dealer

or Power Company.

zDo not try to repair the monitor by yourself, as it contains no user-serviceable parts. This monitor

should only be repaired by a qualified technician.

zDo not remove the monitor cabinet. There are high-voltage parts inside that may cause electric

shock to human bodies.

zStop using the monitor if the cabinet is damaged. Have it checked by a service technician.

zPut your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable

immediately and consult your closed dealer.

zAlways unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth. Apply

non-ammonia based cleaner onto the cloth, not directly onto the class screen.

zDo not place heavy objects on the monitor or power cord.

2. Product safety notice

Many electrical and mechanical parts in this chassis have special safety visual inspections and the

protection afforded by them cannot necessarily be obtained by using replacement components rated

for higher voltage, wattage, etc. Before replacing any of these components read the parts list 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.

3. Service notes

zWhen replacing parts or circuit boards, clamp the lead wires around terminals before soldering.

zKeep wires away from high voltage, high temperature components and sharp edges.

zKeep wires in their original position so as to reduce interference.

zAdjustment of this product please refers to the user’ manual.

Acer Acer –LCD-D240H

01 Product Specification

1. General:

Acer D240H is designed with LVDS interface and VGA/DVI-D/HDMI input, and

Embedded DPF Function ,it featured with embedded universal AC power supplies and audio input. It’s

a green product and meets all ROHS standard. The power button and display control buttons are on

the front of the monitor. The monitors shall automatically to display lower resolution video modes into

1920x1080 full screen display. It can support 720P when DPF Mode,The image can be adjusted

through OSD control. It support HDCP and color management function.

1.1 Main Features

Maximum resolution : 1920(x3) x 1080 @ 60Hz

Back light system : 4 CCFL (top & bottom edge side)

Pixel pitch : 276.75 um (H) x 276.75 um (V)

Display area : 531.36mm (H) x 298.89mm (V)

Brightness : 300cd/m² (TYP.)

Contrast ratio : 1000׃1 (TYP.)

DCR :80000:1 (Max)

Response time (Tr+Tf) : 5ms (TYP. ON/OFF)

2ms (Gray to Gray)

Viewing angle : 170° (H)/ 160°(V), (TYP.)

Input interface : Analog (D-sub 15 pin)

Digital Option (DVI-D 24 pin & HDMI 19Pin)

Power management : Compatible with VESA DPMS

Plug & Play : VESA DDCCI

OSD language : English, French, Spanish, Italian, Deutsch,

Simplified Chinese, Traditional Chinese, Japanese

(Dutch, Finnish, Russian depend on sale region)

Universal AC power supply

1.2 Accessories

AC Power Cord : 1.8 m. (Black. Cord type depend on sale region)

VGA cable : 1.8 m. (15 pin D-SUB, black cable with blue male connector)

User manual : English (640Mb CD)

Warranty card :

DVI cable (option) : 1.8 m. (18+1 pin, black cable with white connector)

HDMI cable (option) : 1.8 m. (19 pin, black cable with white connector)

Acer Acer –LCD-D240H

USB: USB2.0 (optional function)

Webcam: 1.0M resolution(1280 x 800), standard USB2.0 interface, array microphone

(optional function)

2. Operation Specifications

The unit should suffer no visible cosmetic damage and should operate with no degradation in display quality

during exposure to the operating conditions and after exposure to the non-operating conditions, in any

sequence.

2.1 Environmental conditions

Operating Specification

Temperature range 0°C to 50°C

Relative humidity 5% to 90%

Altitude 0 to 3048M (10000 ft)

Storage

Temperature range -20°C to 60°C

Relative humidity 5% to 90% (not condense)

Altitude 0 to 9144M (30000 ft)

2.2 Safety, EMC, Ergonomics and Compatibility Requirements

Items Description

UL/c CB TUV/G CCC Other

Safety ●●●●

FCC CE CCC VCCI-B

EMC ●●●●

TCO TCO03

Ergonomics ●●

Windows Windows 2000 Windows Windows

Compatibility ●●●●

Energy StarPower

Mana

ement ●

2.3 Electrostatic Discharge Requirements

Acer Acer –LCD-D240H

Reliability

Items Condition Spec Note

MTBF T=25℃>50,000 Hours，

CCFL Life time Luminance

becomes 50% 50,000 Hours(Typ) Note1

Note1. Display an all WHITE field at mid Brightness and Contrast settings.

3. Electrical and Optical Characteristics and Performance

3.1 Main Power Supply

3.1.1 Input characteristics

Items Condition Spec Note

AC Input Voltage range Universal input full range 90~264Vac

AC Input Voltage rating Universal input full range 100~240Vac

AC input frequency range 90~264Vac 47~63Hz

AC input frequency rating 100~240Vac 50~60Hz

100Vac 2.0A(max)AC Input Current

240Vac 0.8A(max)

115Vac,cold star,25°C 35A (max)

Inrush Current

230Vac,cold star,25°C 70A(max)

See Note2

AC-DC power Efficiency DC output full loading ≥79%

Note2. Before each test, the buck capacitor need to be discharged.

Beforeeachtest,itmust be 10 minutes at least after the latest test.

Hot star not component be damaged.

3.1.2 Output characteristics

Items Condition Spec Note

+25V output <800mv

+5V output

USB +5V output:

Audio +5V output:

<500mv

<150mv

<500mv

With system See note 3

+25V output <480mv

Ripple and Noise

+5V output

USB +5V output:

Audio +5V output:

<100mv

With dummy Load

25V loading:0.3A~1.4A

5V loading:0.75A~1.5A

Audio 5V: 0A~1.2A

USB 5V: 0A~1.5A

Vcc25V:23.2V~28V

Vcc5V: 4.75V~5.25V

Audio 5V: 4.95V~5.45V

USB 5V: 4.75V~5.25V

For system active

DC Output Voltage

25v loading:0.1A~1.5A

5V loading: 0A

Vcc25V: 23.2V~30V

Vcc5V: 4.75V~5.25V

For power saving or DC

off

Item Condition Spec

Contact discharge: 4KV

Contact discharge: 8KV ●

Air discharge : 8KV

Electrostatic

Discharge IEC61000-4-2(EN55024)

Air discharge : 15KV ●

Acer Acer –LCD-D240H

DC output loading

capability

Vcc5V/1.8A,

Vcc25V/1.4A

Audio 5V: 1.5A

USB 5V: 1.5A

Rise Time <50mS

Dynamic load change

Hold-up time AC input: 100V~240V >10mS

Overshoot <10%

Turn on delay time 2S

Power management See Table-1

Note3: Paralleled a 0.1uF ceramic Cap. And 47uF aluminum Cap. Between the end of DC loading side,

Measured band-width=20MHz. Ripple voltage of +25V is less than 1500mv when enter into burst mode.

3.1.3 Protection characteristics

Protection Condition Spec

OPP(Over current protection) nominal AC input 90W ( min )

SCP(short circuit protection) with auto-recovery function

OVP(Over voltage protection) Auto recovery <output capacitor voltage

OTP(Over temperature protection) NA

Fuse protection NA

Table-1

Status H-sync V-sync Video Power LED

Power On on on active ≤70W White

off on blanked < 2W Amber

on off blanked < 2W Amber

Power Saving

off off blanked < 2W Amber

Power Off -- -- -- < 1W Off

3.2 Backlight Power Supply

Panel: AUO-M240HW01-V2

Items Specification

Lamp 4 CCFL

Input Voltage 23.2---28V

Input curren

1.2A (Typ.), 1.4A (Max.)

On/Off switch level 3.6V≧V on≧2.0 V (on)

-0.3v ≤V off ≤0.8 V (off)

On/Off switch level 3.6V≧V on≧2.0 V (on)

-0.3v ≤V off ≤0.8 V (off)

Brightness PWM Duty (ACM Off) 35%~100%

Brightness PWM Duty (ACM On) 3%~100%

CCFL operating Voltage 900Vrms (Typ.),

7.5mA (Typ.)

CCFL Current

8.0mA (Max.)

Acer Acer –LCD-D240H

CCFL startup voltage ≧2000 Vrms (0˚C)

CCFL startup voltage ≧1850 Vrms (25˚C)

Operating frequency 40~60 KHz

Protect delay time > 1 second

Efficiency ≥75%

Note: Other panels please refer to the reference panel specs.

Brightness output

The test to verify specifications in this section shall be performed under the following standard conditions

unless otherwise noted.

Temperature : 25 ± 5°C

Test pattern : white

Video Resolution : 1920 x 1080

Video input level : 700 mV ± 2%

Warm-up time : 30 minutes

Set brightness control and also contrast control at maximum, to measure the screen center, the light

output shall BL ≥240 cd/m2 .

3.3 White balance

The test standard conditions refer to Sec 3.3. (Brightness and contrast are under default value)

Chromaticity Coordinate

Mode

x y

Cool 9300K 0.283 ± 0.030 0.297 ± 0.030

Warm 6500K 0.313 ± 0.030 0.329 ± 0.030

User Panel While x Panel While y

3.4 Brightness uniformity

The test standard conditions refer to Sec 3.3.

Acer Acer –LCD-D240H

%≥75

)(backlightpointsnineofluminanceMax.

)(backlightpointsnineofluminanceMin.

4. Input / Output Signal Specifications

4.1 AC in

4.1.1 AC Input Voltage: 100~240VAC

4.1.2 AC Input Current: 1.2A @100Vac, 0.6A @240Vac

4.1.3 AC Frequency Range: 50~60Hz

4.2 Audio in

4.2.1 Input impedance ﹕≧10K ohm

4.2.2 Frequency response range ﹕200Hz ~ 10kHz

4.3 USB in (Option)

The USB 2.0 includes 4 pins;

pin1:VBUS; pin2:DM; pin3:DP; pin4:GND

4.4 HDMI in

HDMI type A Connector Pin assignment:

19 18 17 16 15 14 13 12 10 9 8 7 6 5 4 3 2 1

Pin Symbol Pin Symbol

1 TMDS Data2+ 11 TMDS Clock shield

2 TMDS Data2 shield 12 TMDS Clock-

3 TMDS Data2- 13 CEC

4 TMDS Data1+ 14 No connect

5 TMDS Data1 shield 15 SCL

6 TMDS Data1- 16 SDA

7 TMDS Data0+ 17 DDC/CEC Ground

8 TMDS Data0 shield 18 +5V Power

9 TMDS Data0- 19 Hot Plug Detect

10 TMDS Clock+

Acer Acer –LCD-D240H

4.5 DVI-D in

DVI-D Connector Pin assignment:

Pin Symbol Pin Symbol

1 TMDS Data 2- 16 Hot Plug Detect

2 TMDS Data 2+ 17 TMDS Data 0-

3 TMDS Data 2/4 shield 18 TMDS Data 0+

4 19 TMDS Data 0/5 shield

5 20

6 DDC Clock 21

7 DDC Data 22 Clock shield

8 Analog Vertical Sync 23 Clock +

9 TMDS Data 1- 24 Clock -

10 TMDS Data 1+

11 TMDS Data 1/3 shield

14 +5V Power

15 GND

4.6 VGA in

4.6.1 D-sub Connector Pin assignment:

Pin Symbol

1 Red Video

2 Green Video

3 Blue Video

4 N/C

5 Ground

6 Red Ground

7 Green Ground

8 Blue Ground

9 PC +3.3/+5V

10 Sync. Ground

11 N/C

12 DDC SDA

13 H sync

14 V sync

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