Acer B243HL User manual

Acer Acer –LCD-B243HL
- 0 -
Service Manual
LCD MonitorAcer B243HL

1
1
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:

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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
12 TMDS Data 3-
13 TMDS Data 3+
14 +5V Power
15 GND
4.5 VGA in
4.5.1 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
15 DDC SCL

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4.5.2 Signal SPEC:
Items Condition Specification
Analog RGB signal Input impedance =75 Ohm 0.7Vp-p
Sync Input impedance ≧1k Ohm TTL level, Separate H/V-sync(+/-)
H-Sync Frequency 30K~80KHz
V-Sync Frequency 55~75Hz
4.6 Timing table
Mode Resolution
(active dot)
Resolution
(total dot)
Horizontal
Frequency (KHz)
Vertical
Frequency (Hz)
Nominal Pixel
Clock (MHz) Write in EDID
640x480@60Hz 800 x 525 31.469 59.941 25.175 23H
640x480@72Hz 832 x 520 37.861 72.809 31.500 N/A
MAC [email protected] 864x525 35 66.66 30.24 23H
VESA 720x400@70Hz 900x449 31.469 70.087 28.322 23H
800x600@56Hz 1024 x 625 35.156 56.250 36.000 23H
800x600@60Hz 1056 x 628 37.879 60.317 40.000 23H
SVGA
800x600@72Hz 1040 x 666 48.077 72.188 50.000 N/A
1024x600@60Hz 1312x622 37.320 60.000 48.964 N/A
1024x768@60Hz 1344x806 48.363 60.004 65.000 24H
XGA 1024x768@70Hz 1328x806 56.476 70.069 75.000 24H
1152x864@75Hz 1600x900 67.5 75 108 26H~27H
VESA 1280x960@60Hz 1800x1000 60 60 108 N/A
SXGA 1280x1024@60Hz 1688x1066 63.981 60.020 108.000 2EH~2FH
VESA 1280x720@60Hz 1650x750 44.955 59.940 74.176 N/A
1280x800@60Hz 1680x831 49.702 59.810 83.500 28H~29H
WXGA 1360x768@60Hz 1792x795 47.712 60.015 85.500 N/A
WXGA+ 1440x900@60Hz 1904x931 55.935 59.887 106.500 2AH~2BH
WSXGA+ 1680x1050@60Hz 2240*1089 65.290 59.954 146.250 N/A
1600x1200@60Hz 2160x1250 75.000 60.000 162.000 N/A
1920x1080@60Hz 2576x1120 67.158 59.963 173.000 2C~2D
1920x1080@60Hz 2200x1125 67.500 60.000 148.500 36H~46H
UXGA
1920x1080@60Hz 2080x1111 66.587 59.934 138.500
Note: 1. Non-interlace signals only (An interlace signal cannot be display)
2. Please refer to F/W specification for more detail
3. Each frequency of Power Macintosh and Sun Ultra is a reference value

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4.7 Audio output SPEC
Specification
Items
Min TYP MAX
TEST CONDITIONS
Output power (W) 1.6 2.0 2.4 THD+N = 10%﹐T 1KHz 1Vrms
Output impedance (Ω) 3.4 4 4.6 AT 1KHz 1Vrms
Total harmonic distortion plus noise --- --- 10% Po≦2.0W
Signal to noise ratio (dB) 40 --- --- THD+N≦5%
PWM frequency (KHz) 200 250 300
Note: The low pass RC Filter (R=100Ω/ C=0.047uF) for Class-D Output Power and THD+N Measurement
4.8 DDC data
EDID File Format : VESA’s EDID Standard Version #3, Revision #0,
EDID Structure : Version #1, Revision #3.
EDID Data Table : See the attached table (for example)

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4.8.1 VGA EDID table
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 00 FF FF FF FF FF FF 00 04 72 D3 00 40 85 40 85
1 36 12 01 03 08 35 1D 78 EA 60 85 A6 56 4A 9C 25
2 12 50 54 B3 0C 00 71 4F 81 00 95 00 D1 C0 81 80
3 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
4 45 00 13 2A 21 00 00 1A 00 00 00 FC 00 42 32 34
5 33 48 4C 0A 20 20 20 20 20 20 00 00 00 FD 00 37
6 4B 1E 50 12 00 0A 20 20 20 20 20 20 00 00 00 FF
7 00 4C 38 35 34 4C 38 35 34 34 30 31 30 0A 00 CS
4.8.2 DVI EDID table
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 00 FF FF FF FF FF FF 00 04 72 D3 00 40 85 40 85
1 36 12 01 03 80 35 1D 78 EA 60 85 A6 56 4A 9C 25
2 12 50 54 B3 0C 00 71 4F 81 00 95 00 D1 C0 81 80
3 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
4 45 00 13 2A 21 00 00 1A 00 00 00 FC 00 42 32 34
5 33 48 4C 0A 20 20 20 20 20 20 00 00 00 FD 00 37
6 4B 1E 50 12 00 0A 20 20 20 20 20 20 00 00 00 FF
7 00 4C 38 35 34 4C 38 35 34 34 30 31 30 0A 00 CS

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5. Function Specifications
All the tests to verify specifications in this section shall be performed under the following standard
conditions unless otherwise noted. The standard conditions are:
Temperature : 25 ± 5°C
Warm-up time : 30 minutes minimum
Checking display modes : All the specified modes
5.1 Panel general specifications
5.1.1 General specifications
Item Describe
Supplier AUO
Model name M240HW01-V6
Display Area 531.36 × 298.89
Pixel Pitch 276.75(Per one triad) × 276.75
Display Colors: 16.7M colors (RGB 6-bit + Hi_FRC)
Number of Pixel 1920 × 1080
Pixel Arrangement R.G.B. Vertical Stripe
Brightness 250 cd/m2 (TYP.)
Contrast Ratio 1000 (TYP.)
Viewing Angle 170(Horizontal) / 160(Vertical)
Display Mode Normally White
Frame rate 75
Response Time 5ms (TYP. ON/OFF)
Surface Treatment Anti-Glare, 3H
Lamp 2 Bar LED
Outline Dimension 556.0(W) ×323.2(H) ×9.9(D) (TYP.)

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5.1.2 LCD module defects
LCD module defects check follow to the IIS.
5.2Keypad Function
5.2.1 Control buttons
[POWER] Power on or power off the monitor
[►], [◄]
A. When “Main OSD” displays, press these keys to change the contents of an adjustment
item, or change an adjustment value
B. When “Main OSD” un-displays, press [►] to show “Audio” OSD and increase the
volume, press [◄] to show “Audio” OSD and decrease the volume .
[MENU]
A. When “Main OSD” un-displays, press [MENU] to enter OSD interface.
B. When “Main OSD” displays, press [MENU] to perform function of menu icon that is
highlight or enter next level menu.
[AUTO]
A. When “Main OSD” un-displays, press [AUTO] to perform auto-adjustment
B. When “Main OSD” displays, press [AUTO] to return to previous level menu
C. When “Empowering Technology OSD” displays, press [AUTO] to exit the OSD
[e Color ]
A. When “Main OSD” un-displays, press [e Color] to show “Empowering Technology OSD”.
B. When “Main OSD” displays, press [e Color] to exit the OSD, and to show “Empowering
Technology OSD”
5.2.2 Hot Key Operation
HOT KEY OPERATION
FUNCTION e Color AUTO MENU ◄ ► POWER DESCRIPTION
FACTORY
MODE ●ON
Press [e], and then press [POWER]
for DC power on. OSD menu will be
shown with “F” on the left top. Select
“F” for entering factory mode.

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5.3 OSD Structure
The On-Screen Display (OSD) shall be an easy to use icon based menu through keypad OSD
buttons or remote control unit. The unit shall leave the factory with all OSD controls set to their default
values.
First Second Third Control Range Default Value
ACER eColor Management
empowering
Technology
--- Standard mode
User mode 50
Text mode 50
Standard mode 50
Graphics mode 60
Contrast 0 ~ 100
Movie mode 56
User mode 77
Text mode 44
Standard mode 77
Graphics mode 97
Brightness 0 ~ 100
Movie mode 77
Brightness
User
ACM OFF
Focus --- 0 ~ 100 Depend on each timing
Image
Clock --- 0 ~ 100 50 ○1
H. Position --- 0 ~ 100 50
Position
V. Position --- 0 ~ 100 Depend on each timing
Warm (6500K) --- ---
Cool (9300K) --- ---
Red 0 ~ 100 80
Green 0 ~ 100 80
Color
User
Blue 0 ~ 100 80
NO-EMEA EMEA
English English
--- ---
Deutsch Deutsch
--- ---
Español Español --- ---
简体中文 Dutch --- ---
繁體中文 Russian
--- ---
Français Français --- ---
Italiano Italiano
--- ---
Language
日本語 Finnish
--- ---
English
H. Position --- 0 ~ 100 50
V. Position --- 0 ~ 100 50
OSD
OSD Timeout --- 10~ 120 20
Analog --- --- ---
Input Source
(Dual) Digital --- --- ---

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Wide Mode Full/ Aspect Full
DDC/CI ON/OFF ON
Wide Mode Full/ Aspect FullInput Source
(Analg only) DDC/CI ON/OFF ON
Resolution --- --- ---
H. Freq --- --- ---
V. Freq --- --- ---
Analog/Digital Input --- --- ---
Info
S/N ETL000….0000(22)
Reset --- --- --- ---
Exit --- --- --- ---
Notes: (1) Clock default 50 is for Visa timing. Others depend on timing.
(2) Depend on timing & S/N
6. SOP of firmware upgrade (Manufacturer of Scaler is Mstar)
6.1 Operational condition:
Equipment: PC, ISP card, signal cable and power cable.
ESD requirements: antistatic wrists, antistatic gloves (fingers), and connecting cable
Name of ISP program: ISP_Tool_v3.7.5.exe
Manufacture of FW IC：PMC/SST/MX
6.2 Operational steps:
1. Connection: connect PC to PCBA with signal cable, and then keep AC and DC in open state.
2. Adjust ISP programming
Firstly, double click ISP_Tool_v3.7.5EXEI and open ISP program, then select “Device”, next select
manufacturer model of FW IC, which should be correspondent with that of PCBA FW IC. Double click Figure
One.
One port of ISP
program card
is connected to
PC print port.

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Secondly﹐download FW software: first select “READ”, and then load FW software in Rooter
(Fig.2).
Thirdly, select “Connect” and enter ISP MODE as in the following Figure 3.
FW IC
Model
Software
Checksum
FW software
rooter

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Fourthly, select “AUTO”, and keep its default value. Click “RUN” for beginning programming. There
will be prompting if programming is OK.
Note: if programming fails or success rate is not high, click “Config” and adjust its speed in
“E2PROM DEVICE SETTING”