Acer B243HL User manual

Acer Acer –LCD-B243HL
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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
Copyright
Copyright 2006 InnoLux Tech. Corp. Ltd
All Rights Reserved
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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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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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
g
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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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
t
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: