Acer B243HL Manuel utilisateur

Acer Acer –LCD-B243HL

- 0 -

Service Manual

LCD MonitorAcer B243HL

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Table of Contents

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

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

02 Flat Panel Specification ......................................................................................21

03 Exploded Diagram ..............................................................................................47

04 Troubleshooting....................................................................................................49

05 Spare Parts List ..................................................................................................54

06 Schematics and Layouts ......................................................................................58

07 Assembly and Disassembly ................................................................................73

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 B243HL Service Manual

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Acer Acer –LCD-B243HL

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.

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Acer Acer –LCD-B243HL

01 Product Specification

1. General:

Acer B243HL is designed with LVDS interface and VGA/DVI-D input, 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. The image

can be adjusted through OSD control. It support HDCP and color management function.

1.1 Main Features

1.1.1 ForAUO M240HW01-V0 panel

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

Back light system : 2 bar Led

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

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

Brightness : 250cd/m² (TYP.)

Contrast ratio : 1000׃1 (TYP.)

ACM :80000:1 (Max)

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

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

Input interface : Analog (D-sub 15 pin)

Digital Option (DVI-D 24 pin )

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

1.1.2 Other main function features

zInput interface : VGA/DVI/USB upstream

zVGA input : D-Sub

zDVI input : DVI-D

zUSB : Support USB2.0 (optional function)

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)

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

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USB cable(option) : 1.8m.(4pin, black cable with white connector)

Audio cable(option) : 1.8m.( green cable with white connector)

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

Low Temperature 0°C (Relative Humidity is as low as possible), 12 hrs.

High Temperature +40°C / 20% R.H., 12 hrs.

High Humidity +32°C/ 80% R.H., 12 hrs

Altitude 12,000 feet at 25°C (hold 3.5 hrs)

Storage

Low Temperature -30°C / humidity not controlled

High temperature &low humidity +65°C/ 10%R.H.

Test Profile +25°C/ 50%R.H.(2hrs)-> -30°C/ No R.H.(12hrs).-> +41°C/ 90%

R.H.(12hrs)->+65°C/ 10% R.H.(12 Hrs)->+25°C/ 50% R.H.(2hr)

Max. Wet Bulb Temp 39°C

Altitude 40,000 feet at -30 °C (hold 1 hr)

Notice:1.Altitude Ramp rate: <= 3,500 feet per minute

2. Packed properly with PE bag, cushion material, carton & seal tape

3. power off when test storage

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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

2.4 Reliability

Items Condition Spec Note

MTBF Operating condition

is 25°C >15,000 Hours

LED Life time

Stable condition at

25℃15,000 Hours(Typ) Note1

Note1. Operating with fixed driving current.

Item Condition Spec

Contact discharge: 4KV

Contact discharge: 8KV ●

Air discharge : 8KV

Electrostatic

Discharge IEC61000-4-2(EN55024)

Air discharge : 15KV ●

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Acer Acer –LCD-B243HL

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 1.5A(max)AC Input Current

240Vac 0.6A(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 ≥80%

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 <1500mv

+5V output <300mv

Audio 5V output <500mv

USB +5V output <150mv

With system See note 3

+25V output <480mv

+5V output <100mv

Audio 5V output <100mv

Ripple and Noise

USB +5V output <100mv

With dummy Load

25V loading:0.1A~0.8A

5V loading:0.75A~3.2A

Audio 5V: 0A~1A

USB 5V: 0A~2A

Vcc25V:23.5V~29V

Vcc5V: 4.85V~5.35V

Audio 5V: 4.5V~5.5V

USB 5V: 4.75V~5.25V

For system active

DC Output Voltage

25v loading:0A

5V loading: 0.1A

Vcc25V: 23.5V~30V

Vcc5V: 4.85V~5.35V

For power saving or DC

off

DC output loading

capability

Vcc5V/3.2A,

Vcc25V/0.8A

Audio 5V: 1A

USB 5V: 2A

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

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Protection Condition Spec

OPP(Over current protection) nominal AC input 60W ( 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 ≤50W Blue

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: M240HW01-V6

Items Specification

Lamp 2 Bar LED

Input Voltage 23.5---29V

Input curren

0.6A (Typ.),0.8A (Max.)

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) 30%~100%

Brightness PWM Duty (ACM On) 1%~100%

LED Voltage 42.9Vrms (Typ.), 44.2Vrms(Max)

20mA (Type.)

LED Current

25mA (Max.)

Efficiency >75%

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

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3.3 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 ≥200 cd/m2 .

3.4 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

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3.5 Brightness uniformity

The test standard conditions refer to Sec 3.3.

%≥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

4.3USB in

The USB 2.0 includes 4 pins:

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

4.4DVI-D in

DVI-D Connector Pin assignment:

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