ACER
ACER_LCD_G24_SM080519V1
Service
Model ID:MB243WABNS
Service Manual
Table of Contents
01. Product Specification--------------------------------------------------------------------------------- 02
02. OSD Menu-----------------------------------------------------------------------------------------------08
03. Exploded Diagram------------------------------------------------------------------------------------- 10
04. Assembly and Disassembly Procedures-----------------------------------------------------------12
06. Firmware Upgrade Procedure------------------------------------------------------------------------31
07. Writing EDID Procedure-------------------------------------------------------------------------------33
08. Schematics and Layouts------------------------------------------------------------------------------ 35
Appendix I : User’s Manual
Appendix II: Quick Setup Guide
Appendix II : Spare Parts List
Appendix IV: Software Pack
Safety Notice
Any person attempting to service this chassis must familarize with the chassis and be aware of the
necessary safety precautions to be used when serving electronic equipment
containing high voltage.
Published by LITE-ON Service Printed in Taiwan © All rights reserved Subject to modification
19th-May-2008
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ACER G24
2
1. Product Specification
1.1 SCOPE
This document defines the design and performance
requirements for a 24W inch diagonal , flat panel monitor
.The display element shall be a WUXGA (1920x1200)
resolution TFT-LCD (Thin Film Transistor Liquid Crystal
Display).16.7M color(RGB Hi+FRC) images are displayed
on the panel.Video input signals are analog RGB (0.7Vp-p).
When the systemis powered-on , previously stored screen
parameters for a pre-defined mode will be recalled if the
operating mode is one of stored in memory( 24 factory , 9
users timing ).This monitor operates normal by non-
interlaced mode. DDC (Display Data Channel) function is
DDC2Bi compliance Power saving function complies with
the DPMS (Display Power Management Signaling)
standard.
MONITOR SPECIFICATIONS
ITEM
Frequency
SPEC
Analog :
Signal Input
(Analog)
H : 30kHz~94kHz
V : 55Hz~76Hz
Pixel clock
Video Input
205MHz (Max)
Analog 0.7Vp-p
Display Pixels
Sync Signal
640 x 480 (VGA) ~ 1920 x 1200 (WUXGA)
Separate SYNC for TTL (N or P)
Digital :
Signal Input
(Digital)
Frequency
H : 30kHz~94kHz
V : 55Hz~76Hz
Pixel clock
Video Input
165MHz (Max)
Analog 0.7Vp-p
Input Impedance 75Ω
Display Pixels
AC Input
640 x 480 (VGA) ~ 1920 x 1200 (WUXGA)
AC100V ~ AC240V 10% 50/60Hz , 3 pin AC power cord
Connector
Input connector
D-SUB 15 pin & DVI-D
1.2 GENERAL REQUIREMENTS
AMLCD: LTM240CT01
Audio Jack (OPTIONAL) Audio input 3.6F
Power Consumption
User's Control
AC in 100V~240V
Front
active 90W, power saving < 2W
LTM240CT03
Empowering,Auto Adjust,Adjust(-),Adjust (+),Menu,Power
1.2.1 Test Condition
Contrast , Brightness , Position ,Clock ,Phase
OSD
,Analog/Digital,RESET, Color , Language select , etc.
Brightness level & contrast level max. Full white
pattern test mode following spec. Warm up more than
1 hr, ambient light < 10 Lux , Luminance meter
CA110 or BM7 or same equipment .
1.2.2 Test Equipment
Pre-Defined Timing
Factory
User
24
9
Plug and Play
Power Saving
VESA DDC2Bi
VESA DPMS
≦ H 1kHz, ≦ V 1 Hz
Input Signal Counter Tolerance
The reference signal source is a calibrated Chroma
2135 video generator or higher.The use of other
signal generators during qualification and production
is acceptable provided the product complies with this
specification.
1.3.1 Interface Connectors
1.3.1.1 Power Connector and Cables
The AC input shall have an IEC/CEE-22 type male
power receptacle for connection to mains power.
The power cord shall be with length of 1.8+/-0.005
meters.
1.3 ELECTRICAL
This section describes the electrical requirement of the
monitor. The LCD monitor consists of an interface board , a
power board , a function key board. The interface board
wil l house the flat panel control logic , brightness
control logic, audio function control (option), key function
control, DDC and DC to DC conversion to supply the
appropriate power to the whole board and LCD flat panel ,
and transmitting LVDS signals into LCD flat panel module
to drive the LCD display circuit .The power board will
support main power DC5V to interface board, and the
power DC5.3V to audio function power of interface board,
and drive the two CCFLs (Cold Cathode Fluorescent
Tube).The interface board provides the power ON / OFF
control over the whole monitor and control for DPMS LED
indicator to function key board.
1.3.1.2 Video Signal Connectors and Cable
The signal cable shall be 1.8 +/-0.005 meters long.
At the end of the cable shall be a molded-over,
shielded,triple row, 15 position, D-subminiature
connector. The CPU connection shall have captive
screw locks, which will be adequate for hand
tightening. The monitor connection may use small
screws.
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3
ACER G24
1. Product Specification (continued)
C
D
o n n e c t o r P i n
A
s s i g n m e n t
1.3.2.1 Video Signal Amplitudes
S U
P
B
i n
S i g n a l
e d - V i d e o
P
i n
S i g n a l
P
i n
S i g n a l
The three video inputs consist of Red ,Green , and Blue
signals, each with its own coaxial cable terminated at the
monitor. These video signals are analog levels, where 0
V corresponds to black , and 700 mV is the maximum
signal amplitude for the respective color, when each
signal is terminated by a nominal 75.0 ohms .For a given
monitor luminance levels are measured using this
defined video amplitud driving a monitor meeting the
termination requirements .The signal amplitude is not to
be readjusted to compensate for variations in termination
impedance.
1
R
G
6
R
G
e d - G
N
D
1 1
N
D
C
D
2
3
r e e n - V i d e o
7
r e e n - G
N
D
1 2
1 3
C
- S D
A
L
B
l u e - V i d e o
C
8
9
B
l u e - G
N
D
H
- S Y
- S Y
N
N
C
C
4
5
N
D
+ 5 V
1 4
1 5
V
D
D
C
- G
N
D
1 0
S y n c - G
N
D
D
C
- S C
C o nne c to r P in D e s c riptio n
D -S U B Pin D e s cription
Pin
1
N ame
Red-V ideo
D e s cription
Red video signal input.
2
G reen-V ideo
B lue - V id e o
G N D
G reen video signal input.
B lue vid e o signa l inp ut.
G round
3
4
5
D D C -G N D
Red-G N D
G reen-G N D
Blue-G N D
+ 5V
D D C ground for the V ES A D D C 2Bi function.
A nalog signal ground for the Red video.
A nalog signal ground for the G reen video.
A nalog signal ground for the Blue video.
6
7
8
9
+ 5V input from host system for the V ES A D D C 2Bi function.
S ignal ground
10
11
12
13
14
15
S ync-G N D
G N D
1.3.2.2 Video Signal Termination Impedance
This analog video signal termination shall be 75Ω+/-1%
which shall be resistive with a negligible reactive
component .
G round
D D C _S D A
H -S Y N C
V -S Y N C
D D C -S C L
S D A signal input for the V ES A D D C B2i function.
H orizontal signal input from the host system.
V ertical signal input from the host system.
S C L signal input for the V ES A D D C 2Bi function.
DVI-I / DVI-D (If using DVI-D cable, C1, C2, C3, C4, C5 is NC)
1.3.2.3 Synchronization ( Sync ) Signals
Pin
1
Signal
Pin
Signal
Pin
21
22
23
24
Signal
RX2-
RX2+
GND
NC
11 GND
12 NC
NC
The Horizontal Sync (HS) TTL signal is used to initiate
the display of a horizontal line. HS may be either active
high or active low, depending upon the timing .The
Vertical Sync (VS) TTL signal is used to initiate the
display of a new frame .VS may be either active high or
active low, depending on the timing
2
GND
RXC+
RXC-
3
13 NC
4
14 5V
5
NC
15 GND
16 HP
C1 Analog Red (NC)
C2 Analog Green (NC)
C3 Analog Blue (NC)
C4 Analog H-Sync (NC)
C5 GND
6
SCL
SCA
7
17 RX0-
18 RX0+
19 GND
20 NC
8
Analog V-Sync (NC)
9
RX1-
1.3.2.4 Sync Signal Levels
10
RX1+
The monitor must accept sync signals from both 3.3 and
5 volt TTL logic families.The inputs shall sense a logic 0
when the input is 0.8 volt or less and shall sense a logic
1 when the input is 2.0 volts or greater. In addition to
these level requirements, there shall also be a minimum
of 0.3 volt hysteresis provided for noise immunity
(typically by using a Schmitt Trigger input ).That is , the
input level at which the monitor actually detects a logic 0
shall be at least 0.3 volt lower than the level at which it
actually detects a logic 1.If the monitor sync processing
circuits are designed around the 3.3 volt logic family
,then the sync inputs must be 5 volt tolerant .
DVI-I / DVI-D Connector Pin Description
Pin Name Description
RX2- TMDS link #0 channel #2 differential pair
Pin Name
Description
1
2
3
4
5
6
7
16 HP
Hot plugging
TMDS link #0 channel #0 differential pair
RX2+ TMDS link #0 channel #2 differential pair
GND GND for no link share
17 RX0-
18 RX0+ TMDS link #0 channel #0 differential pair
19 GND GND for no link share
NC
NC
NC
NC
20 NC
21 NC
NC
NC
SCL
SDA
Clock line for DDC interface
Data line for DDC interface
22 GND Clock shield
Analog
V-Sync
8
9
V-sync for analog interface
23 RXC+ TMDS clock differential pair
RX1- TMDS link #0 channel #1 differential pair
24 RXC- TMDS clock differential pair
Analog
10 RX1+ TMDS link #0 channel #1 differential pair
11 GND GND for no link share
C1
Analog Red signal
Red
Analog
C2
Analog Green signal
Green
Analog
Blue
12 NC
13 NC
14 5V
NC
C3
C4
C5
Analog Blue signal
H-sync for analog interface
Analog GND
Analog
H-Sync
Analog
GND
NC
+5V input fromhost systemfor DDC2B function.
1.3.2.5 Sync Signal Loading
15 GND Ground(Using as Detect Cable)
TTL input loading shall be equivalent to one TTL input
load. When logic 0 is asserted by a sync input , the
maximum current source from any single monitor sync
input to the driver is 1.6 mA .When logic 1 is asserted ,
the maximum current source from the driver to any
single monitor sync input is 400 uA .
1.3.2 Video Input Signals
V
i
d
e
o
I
n
p
u
t
S
n
i
g
n
a
l
N
o
.
S
y
m
b
o
l
I
t
e
m
M
i
N
o
r
m
a
l
M
a
4
6
x
U
n
i
t
R
m
m
e
u
u
m
m
m
a
r
k
1
F
F
h
v
S
c
c
a
a
n
n
n
n
i
i
n
n
g
H
V
o
e
r
i
z
o
n
t
a
l
F
r
e
q
u
e
c
n
c
y
3
0
5
9
7
k
H
z
M
i
i
n
i
i
r
a
n
n
g
g
e
e
2
3
S
g
l
r
t
i
c
a
l
F
r
e
q
u
e
n
y
5
H
z
M
N
n
t
r
a
V
i
h
H
i
L
e
v
e
I
n
p
u
t
2
0
5
o
e
1
t
)
4
5
V
i
i
l
L
o
w
L
e
v
e
l
I
n
p
p
u
t
t
0
.
8
0
V
V
N
7
o
t
e
1
)
V
1
d
e
o
c
R
t
G
B
r
A
n
a
s
l
o
g
n
V
u
i
d
,
e
o
L
e
v
e
l
0
.
0
0
.
7
1
n
.
5
Ω
o
G
r
o
u
n
d
N
o
t
e
)
S
h
m
i
t
-
T
i
g
g
e
r
I
S
u
p
p
o
r
t
e
d
3
.
3
V
d
e
v
i
c
e
H
(
&
V
)
s
y
c
o
u
t
p
u
t
f
r
o
m
P
C
.
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ACER G24
4
1. Product Specification (continued)
1.3.2.6 Abnormal Signal Immunity
1.3.3.4 OSD adjustment
The monitor shall not be damaged by improper sync
timing , pulse duration , or absence of sync , or
abnormal input signal amplitude ( video and/ or sync
too large or too small) , or any other anomalous
behavior of a graphics card video generator when
changing modes , or when any combination of input
signals is removed or replaced . Additionally , under
these conditions , the monitor shall not cause
damage to the driving source
ITEM
CONTENT
BRIGHTNESS
CONTRAST
AUTO CONTRAST
CLOCK
Back light Luminance of the LCD panel is adjusted.
A gain of R , G and B signal is adjusted.
A gain of R , G and B signal auto adjust.
The ratio of dividing frequency of the dot clock is adjusted.
The phase of the dot clock is adjusted.
PHASE
H-POSITION
V-POSITION
AUTO ADJUST
The indication screen is horizontally moved right and left (1 Pixels pitch).
The indication screen is vertically moved up and down (1 Pixels pitch).
Clock system auto adjustment, about under 8 sec.
1.3.3 User Controls and Indicators
1.3.3.1Power On / Off Switch
COLOR BALANCE Select three kinds of modes. ( USER /WARM / Cold ).
OSD POSITION
The OSD indication position can be adjusted.
The monitor shall have a power control switch
Select the language used for the OSD menu among English , French ,
Italian , Deutsch and Spanish.
OSD LANGUAGE
visible and accessible on the front of the monitor .
The switch shall be marked with icons per IEC 417 ,
# 5007 and # 5009.The switch shall interrupt the DC
supply to the monitor
RECALL DEFAULTS All data copy from factory shipment data.
OSD DURATION
POWER-SAVE
Adjust OSD menu off time range from10~120 second.
Back light of the LCD panel is cut when the signal is not input (AC line
power consumption 2W or less).
1.3.3.2 Power Indicator LED
The frequency of the horizontal / vertical synchronizing signal under the
input is indicated.
INFORMATION
The monitor shall make use of an LED type
indicator located on the front of the monitor .
The LED color shall indicate the power states as
given in Table 1.
※ NOTE : OSD MENU SEE APPENDIX A
1.3.4 Monitor Modes and Timing Capability
1.3.4.1 Format and Timing
Table 1
The monitor shall synchronize with any vertical
frequency from 55 to 76 Hz , and with any
horizontal frequency from 30 to 94KHz. If the input
frequency is out of the above – specified range,
the monitor shall display a warning screen
Function
Full Power
LED Color
Blue color
Orange color
Sleep
indicating that the input frequency is out of range.
Under no circumstances shall any combination of
input signals cause any damage to the monitor .
1.3.4.2 Factory Assigned Display Modes
1.3.3.3 On-Screen Display
The Lite-ON On Screen Display system shall be
used , controlled by a Menu button. If the buttons
remain untouched for OSD turn off time while
displaying a menu , the firmware shall save the
current adjustments and exit. Also, if the video
controller changes video mode while the OSD is
active, the current settings shall be saved
immediately, the OSD turn off, and new video mode
is displayed.
There are 24 factory pre-set frequency video
modes. These modes have a factory pre-set for all
characteristics affecting front-of-screen
performance. When the system is powered-
on,previously stored screen parameters for a pre-
defined mode will be recalled if the operating
mode is one of those stored in memory. If the
operating mode is not one of those stored in
memory, the monitor CPU will select the PRESET
timing for a mode that is the next lowest in
Description
Key
When no OSD display OSD Displayed
1. To display the OSD menu on the screen.
Menu Display
2. To select the OSD sub-Menu
MENU
Speaker Volume/Plus
(with Audio)
1. Back-forward selection of the OSD menu.
2. Decrease the value after sub-menu selected.
>
horizontal scanning frequency to the mode being
currently used. The screen parameters may be
adjusted by the use of the front bezel controls and
then may be saved as a user defined mode. The
monitor shall include all the preset video timings
shown in the following page.(Please see Note.(3) )
Speaker Volume/Minus 1. Forward selection of the OSD menu.
(with Audio) 2. Increase the value after sub-menu selected.
<
Auto Adjust Function Menu or sub.menu auto adjust
Auto
E
Empowering
Menu or sub.menu EXIT/Scenario mode
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5
ACER G24
1. Product Specification (continued)
1.3.4.3 Mode Recognition Pull-in
■ Digital inputs (DVI, HDMI): Conflicting video- and PC
timings are to be treated as Video timings with one
The monitor shall recognize preset modes within a
range of +/-1KHz whichever is less for horizontal ;
and within +/-1Hz for vertical.
exception: 640x480p/60Hz timing to be treated as PC-timing.
■ Analog input (VGA) treats all timings as PC-timings.
1.3.4.4 User Display Modes
In addition to the factory pre-set video modes,
provisions shall be made to store up to 9 user
modes. If the current mode is a user mode, the
monitor shall select its previously stored settings.
If the user alters a setting, the new setting will be
stored in the same user mode. The user modes
are not affected by the pre-set command. If the
input signal requires a new user mode, storage of
the new format is automatically performed during
user adjustment of the display (if required).(
Please see Note.(4) )
1.3.5 Controller Requirements
1.3.5.1 General Requirements
The monitor shall include a controller capable of
converting the analog RGB signal from a standard
WUXGA resolution video controller in the CPU to a
signal which can be displayed on the panel. The
controller will include a PLL, A/D converters, LVDS
transmitter and other circuitry necessary to perform
its function. The PLL shall be stable enough to
ensure that a static image from the CPU is placed
in the same physical location on the flat panel in
each frame.
Preset timing Chart
Preset Tim ing Chart
1.3.5.2 Video Stretching
H-Sync
(KHz)
31.472
31.469
37.5
V-Sync Band W idth
Polarity
Item
Resolution
Source
(Hz)
70.4
(M Hz)
28.325
25.175
31.5
H
V
+
-
1
2
3
4
720
640
640
648
x
x
x
x
400
480
480
500
-
-
VGA
VGA
VESA
M AC
The monitor shall contain provisions to “stretch” the
video signal, so that an input signal from the
computer in any resolution smaller than 1920 x
1200 is automatically expanded to fill the entire
screen.
59.94
75
-
-
31.234
57.735
31.234
+
+
5
6
800
800
x
600
600
37.879
46.875
60.3
75
40
+
+
+
+
VESA
VESA
x
49.5
7
8
1024
1024
1280
1280
x
768
768
48.363
60.023
63.981
79.976
60
75
60
75
65
78.75
108
-
-
VESA
VESA
VESA
VESA
x
+
+
+
+
+
+
9
x
1024
1024
1.3.5.3 Panel Timing and Interface
10
x
135
The controller supplied with the monitor shall
control all panel timing. This controller shall
adequately insulate the monitor from the computer,
so that no possible combination of input signals
from the computer shall cause damage to the flat
panel or any other component of the monitor. The
LCD panel interface shall support the TFT
standard.
11
12
1440
1440
1440
1280
1280
1280
x
900
900
900
55.469
55.935
70.635
45
59.01
59.887
74.98
60
88.75
106.5
136.75
74.25
83.5
+
-
-
+
+
+
+
+
+
-
CVT-RB
CVT
x
x
13
-
CVT
14
x
720
800
+
-
CEA-861
CVT
15
x
x
49.702
62.795
75
60
16
800
75
106.5
162
-
CVT
17
1600
1600
1600
1680
1680
1680
1920
1920
(1) 76
(2) fV
x
1200
1200
1200
1050
1050
1050
1200
1200
60
+
+
+
-
VESA
CVT-RB
VESA
CVT
18
x
74.006
93.75
65.29
64.674
82.306
74.038
74.556
59.924
75
130.25
202.5
146.25
119
19
x
x
x
x
+/-
+
-
20
59.954
59.883
74.892
59.95
59.885
21
+
-
CVT-RB
CVT
22
187
+
-
23
x
154
+
+
CVT-RB
CVT
24
x
193.25
-
NOTE
:
≦
FV
≦
86 : m onitor can display but doesn't guarantee.
86 : warning invalid mode.
<
55, or fV
>
(3) Factory m odel :
After we first burn the code into the flash, every preset-model we run first must do auto-adjusting.
Then it'll not do auto-adjust again when we changed preset-mode back including AC on/off DC on/off.
The only way that preset-mode do auto-adjust again is press '' Internal Factory Reset''.
(4) User m ode
:
1.3.6 DC - AC Inverter Requirements
The code should m em orize 9 timing mode exclusive of preset-m odes as use mode and do auto-adjusting.
W hen user set a new m ode that is not am ong previously. It'll do auto-adjusting then be solved to user mode
The new mode will overwrite the first mem orized user m odes.
The DC-AC inverter is on the power board. The
frequencies used by the DC-AC inverter used to power the
backlight shall be chosen so as to prevent any noticeable
effects on the flat panel (such as a rolling effect).
1.3.7 Power Supply Requirements
The user modes be cleared is sam e as Factory m ode. Just do '' Internal Factory Reset''.
(5) Internal Factory Reset and OSD Factory Reset behavior.
FACTORY PRESET VIDEO TIMINGS (DIGITAL INPUTS)
Pixel
CEA-861-C
code
H-freq V-freq
H-Active V-Active I/P H-tot.
HB
V-tot.
VB
freq
Inputs
(kHz)
(Hz)
(MHz)
The AC to DC converter power supply for the monitor shall
be an external AC to DC converter ”brick” This brick shall
have an IEC receptacle for main power input and a pin - in
---socket for DC power out. The brick shall provide
sufficient power for both the monitor and the backlight
assembly, and shall meet requirements specified in Table
2.
17,18
19
720
576
P
P
I
864
144
700
720
625
49
31.250
37.500
28.125
50.000
50.000
50.000
27.000
74.250
74.250
DVI,HDMI
DVI,HDMI
DVI,HDMI
1280
1920
720
1980
2640
750
30
20
1080
1125
22.5
21, 22
1440
576
I
1728
288
625
24.5
15.625
50.000
27.000
HDMI
31
39
2, 3
4
1920
1920
720
1080
1080
480
P
I
2640
2304
858
720
384
138
370
280
276
280
1125
1250
525
45
56.250
31.250
31.469
44.955
33.716
15.734
67.433
50.000
50.000
59.940
59.940
59.940
59.940
59.940
148.500
72.000
27.000
74.176
74.176
27.000
148.352
DVI,HDMI
DVI,HDMI
DVI,HDMI
DVI,HDMI
DVI,HDMI
HDMI
85
P
P
I
45
1280
1920
1440
1920
720
1650
2200
1716
2200
750
30
5
1080
480
1125
525
22.5
22.5
45
6, 7
16
I
1080
P
1125
DVI,HDMI
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ACER G24
6
1. Product Specification (continued)
Table 2
AC to DC Converter Requirements
1.4.2 Panel Timings
The controller included with the monitor shall translate all
video timings from the CPU that meet the timing
requirements listed in Panel specification into timings
appropriate for the panel. Under no circumstances may the
controller supply the panel with timings that may result in
damage. The controller shall insulate the panel from the
CPU , so that the panel shall always be driven per it's own
specification regardless of the timings being sent from the
CPU.
The operating range shall be from 90 to 132 and 195 to 265 AVC
sinusoidal for all models specified.
Input Voltage Range
Input power frequency range sha;; be from 47.5 to 63 Hz over the
specified input voltage range.
Input Frequency Range
Power consumption for the monitor shall be less than 46W over the
specified voltage and frequency ranges. In suspend or sleep mode
the power consumption will be less than 2W.
Power Consumption
Line Fuse
The AC input shall be fused and become electrically open as a result
on an unsafe current level. The fuse many not be user replaceable.
The power supply shall start and function properly when under full
load, with worst case conditions of input voltage, input frequenct,
operating temperature, and cold backlight lamps.
Initial Cold Start
Inrush Current
The inrush current must be limited to 30A when operated at
120VAC, and 50A when operated at 220VAC. Inrush current is
measured at an ambient temperature of 25oC, with the unit
1.4.3 Polarizer Hardness
temperature stabilized in the power-off.
The outer face of the front polarizer panel shall be
The power supply shall be damaged when switched ON for one
second and OFF for one second for seven consecutive after
Hot Start Cycle
operating for one hour at full load, 25oC, and nominal input line
covered with a coating with a # 3 hardness value .
1.4.4 Backlight Requirements
voltage.
The power supply shall contain protection circuitry such that the
application of an input voltage below the minimum specified in this
table shall not cause damage to the power supply unit nor cause
failure of the input.
1.4.4.1 General Requirements
Under Voltage
Line Transient
The backlight assembly shall be designed to
support field replacement at the customer site or
authorized service center. The lamps shall have a
continuous operating life of at least 40,000 hours at
25. The operating life is defined as having ended
when the illumination of light has reached 50% of
the initial value. The lamps shall extend a sufficient
amount from the edge of the light guide that
sputtering over the life of the lamps shall not cause
degradation of the luminance uniformity (such as
non-illuminated bands along the edges of the
display).
The power supply shall operate within IEC 801-4 ( 1KV) and IEC
801-5 ( 2KV) for the domestic U.S. version. The UPS power
supply shall operate and comply with CE mark.
1.3.8 Display Communications Channel
The monitor assembly shall provide a display
communications channel that conforms to VESA
DDC2Bi hardware requirements. This configuration
shall contain the 128-byte EDID file as specified by
VESA EDID standard.The monitor should not write to
the EDID file for the first two minutes of operation
following power-up UNLESS some action taken by the
user or the host CPU forces the write (for instance,
requesting the serial number via the OSD).
1.4.4.2 Lamps Startup Time
The backlight lamps shall start about 2 sec of the
time the monitor power switch is pressed or the
monitor is restarted from a power - down mode
.The starting time shall stay about 2 sec. for the
minimum expected life of the lamps.
Furthermore, it is recommended that CMOS switches
be incorporated to isolate the DDC IC from outside
connections while the EDID Fault Management is
being updated. This is to prevent corruption of the data
by attempts to read the data while it is being changed.
1.3.9 Firmware Update Function (same ISP function)
The update firmware need through from the D-Sub
connector, use DDC I2C bus to do update firmware.
1.4 PANEL ELECTRICAL
Test conditions are as follows :
Ambient Light ----------------------
Temperature-------------------------- 10℃
Inactive Time ----------------------- > 24 hours
1.4.5 Defects
1.4.5.1 Visual Inspection
< 1.0 lux
1.4.1 General Requirements
The panel used as the display device shall be an
WUXGA resolution, 24W TFT-LCD. This panel shall be
approved for use in this monitor.
The LCD panel shall be inspected with all pixels
set to white,black , red , green , and blue. The color
variation, brightness variation , and overall
appearance must not be perceived as poor quality
by Lite-On . Areas and / or parameters considered
questionable shall be subjected to detailed
measurements .
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7
ACER G24
1. Product Specification (continued)
1.4.5.2 Display Degradation
Over the life of the product , variation of the parameters
1.4.5.6 Smudges, Streaks and Smears
specified in Panel specification shall be maintained
within reasonable limits.The panel must not exhibit any
significant defects while in operation ( excluding the
CCFL operation ).This does not in any way change the
warranty given by the panel manufacturer .
When viewing the panel oriented so as to maximize
reflected light , there shall be no visible smudging ,
streaking, smearing or other nonuniformity from
contaminants ,fingerprints,or defects in any of the
visible surfaces. This is independent of whether the
unit is operating or off .
1.4.5.3 Light Leakage
Except for the active display area , there shall be no
light emission visible from any angle from any other part
of the display . For this test , the ambient illumination
must follow panel's specification.
1.4.5.7 Other Defects
Undefined defects that are considered to be
rejectable by Lite–On will be reviewed by Lite-On as
they become apparent. These panels will be referred
to the Lite - On Corporate / Manufacturer Purchasing
Agreement for disposition.
1.4.5.4 Allowable Defects
No cosmetic defects are allowed except those specified
below.The conditions of visual inspections are as follows
For 24W Series.
1.4.5.8 LCD Inspection
Put LCD panel on inspection table and illuminate the
panel with a daylight fluorescent lamp located above
the panel surface such that the luminance at the
LCD panel is between 1000 lux and 1500 lux .Defect
limits are given in Table 4 .
■Viewing distance is to be approximately 35-50cm
■Ambient illumination is to be 300 to 700 lux.
■Viewing angle shall be at 90 degree.
■Defects not apparent within one minute shall be
ignored.
Average Diameter smaller of
(L+W)/2 or L/20+2W
Acceptable Number
Minimum Separation
1.4.5.5 Defect Terminology
< 0.1mm
Non countable
N / A
15 mm
Table 3 gives the descriptive terms used in classifying
defects.
0.1 mm ~ 0.3 mm
0.31 mm ~ 0.5 mm
0.51 mm ~ 1.25 mm
1.26 mm ~ 2.5 mm
2.51 mm ~ 3.75 mm
Greater than 3.75 mm
10
10
15 mm
5
15 mm
3
3
25.4 mm
25.4 mm
Not applicable
S p o t s o r li n e s th a t a p p e a r d a r k in th e d i s p la y p a tt e r n s a n d a r e
u s u a l ly th e r e s u l t o f c o n t a m in a t i o n . D e f e c ts d o n o t v a r y i n
NONE
D a r k
/
S p o ts
/
/
L i n e s
s iz e o r i n t e n s it y ( c o n tr a s t ) w h e n c o n tr a s t v o l t a g e i s v a r ie d .
C o n t r a s t v a r i a t io n c a n b e a c h i e v e d t h r o u g h t h e u s e o f v a r y i n g
g r a y s h a d e p a t t e r n s .
Note : Allowable distance between spots of two sizes is the minimum separation
number for the smaller spot. Therefore, if there are two spots, 1.30mm and 0.4mm
in diameter, they must be at least 15mm apart.
S p o t s o r li n e s t h a t a p p e a r l ig h t i n t h e d is p la y p a t te r n s .
D e f e c t s d o n o t v a r y i n s iz e o r i n t e n s i ty ( c o n t r a s t ) w h e n
c o n t r a s t v o l ta g e i s v a r ie d . C o n tr a s t v a r ia t io n c a n b e a c h ie v e d
th r o u g h th e u s e o f v a r y i n g g r a y s h a d e p a t t e r n s .
B r i g h t S p o t s
L i n e s
W
h e n t h e u n i t l i g h t s , l i n e s a p p e a r l i g h t ( w h i te ) w i th d i s p l a y
1.5 Optical Characteristics
P o l a r i z e r S c r a t c h
P o l a r i z e r D e n t
p a t t e r n s d a r k a n d d o n o t v a r y in s iz e . P h y s ic a l d a m a g e t o th e
p o l a r iz e r th a t d o e s n o t d a m a g e t h e g l a s s
Depends on the LCD supplier's spec. Details refer to QA
Inspection Spec.
W
h e n t h e u n i t l i g h t s , s p o t s a p p e a r l i g h t ( w h i t e ) w i th d i s p la y
p a t t e r n s d a r k a n d d o n o t v a r y in s i z e . P h y s ic a l d a m a g e t o th e
p o l a r iz e r th a t d o e s n o t d a m a g e t h e g l a s s .
H o r i z o n t a l o r d i a g o n a l li n e s t h a t a p p e a r g r a y w i t h t h e d is p l a y
p a t t e r n s d a r k a n d
m
a y h a v e r e s u l te d f r o m a n “ o u t o f c o n t r o l ”
R u b b i n g L i n e
N e w to n R i n g
r u b b i n g p r o c e s s o n t h e p o l y i m i d e o r “ w a v e s ” o n t h e B E F s o r
p r i s m s h e e t s .
T h e “ r a i n b o w ” e f f e c t c a u s e d b y n o n - u n if o r m c e ll t h i c k n e s s .
W
h e n t h e u n i t l i g h t s , v a r i a t i o n
/
n o n
–
u n i f o r m i t y
M
o t tl i n g
( s p l o t c h i n e s s ) a p p e a r s l i g h t ( w h i t e ) w i th t h e d i s p l a y a n d
m
ig h t v a r y i n s i z e .
W
h e n t h e u n i t l i g h t s , l i n e ( s ) in t h e
m
o n it o r ( v e r t i c a l) o r
m
a j o r
D i m L i n e
( h o r iz o n t a l ) a x i s a p p e a r d i m
h e n t h e u n i t l i g h t s , l i n e s i n b o t h t h e
d o n o t a p p e a r .
s u b p ix e l ( R ,G ,B d o t) s t u c k o f f o n ( e le c t r i c a l ) .
,
b u t n o t c o m p le te l y o n o r o f f .
W
m
i n o r a n d a j o r a x i s
m
C r o s s L in e s O f f
B r i g h t
/
D a r k D o t
A
–
/
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2. OSD Manu (continued)
9
ACER G24
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11
ACER G24
3. Exploded Diagram (continued)
3.2 Product Exploded Diagram
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ACER G24
12
4. Assembly and Disassembly Procedures
4.1 Assembly procedures:
Use a Phillips-head screwdriver screwed the
Connect the cable between power board(P802)
S4
S1
No.1~4 screws till that interface board and bracket
chassis base firmly attached.
and interface board (P301)
Connect the function key cable into interface
board(P303)
(No1~4 screw size=M3x6; Torque=9~10KGFxCM).
Connect the cable between power board(P803)and
inverter board (Cn001)
2
3
Connect the FFC cable into interface board
P301
1
4
P802
CN01
P803
P303
Take the key function cable out from the hole
S5
shown as photo
Fix the function key cable with a PVC tape
Take a bracket chassis base on a protective
cushion and stick an insulator on the specific
position, take a power board and turn it over. Then,
put it on the specific positions of bracket chassis
base.
S2
Turn over the bracket chassis base then fix the
inverter board
S6
Use a Phillips-head screwdriver screwed the
Use a Phillips-head screwdriver screwed the
No.1~5 screws till that power board and bracket
chassis base firmly attached.(No1~4 screw
size=M3x6; No5 screw size=M4x8;
No.1~4 screws till that inverter board and bracket
chassis base firmly attached.
S3
(No1~4 screw size=M3x6; Torque=9~10KGFxCM).
Torque=9~10KGFxCM).
2
3
1
4
1
4
2
5
3
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13
ACER G24
4. Assembly and Disassembly Procedures (continued)
Connect cable into inverter board(CN001)
S7
Take an inverter shielding bracket to cover the
inverter board
Use a Phillips-head screwdriver screwed the
No.1~6 screws till that inverter shielding bracket
and bracket chassis base firmly attached.
(No1~6 screw size=M3x4; Torque=9~10KGFxCM).
Plug in parallel direction
1
4
CNOO1
2
5
3
6
Angel < 5 degrees
Connect the FFC cable to the connector of the LCD
panel.
S8
Take lamp cables out from the holes shown as the
photo.
S10
Turn the monitor faced down and put it on the
bracket chassis module till both parts firmly
Connect FFC cable to LCD panel. There are
two locks over here when plugging in should be
noticed
S9
Plug 6 lamp cables to the connectors of inverter
board.
S11
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ACER G24
14
4. Assembly and Disassembly Procedures (continued)
Take a key function board to hook with front
Use a Phillips-head screwdriver screwed the
S16
S12
No.1~4 screws on both side and assemble the
LCD panel and bracket chassis module.
(No1~4 screw size=M3x6;
bezeland connect to key function cable.
Torque=2.5
KGFxCM).
2
1
4
3
Use a Phillips-head screwdriver screwed the
No.1~2 screws. (No1~2 screw size=M4x10;
Torque=5~7KGFxCM).
S13
Put a rear cover on the assembled unit and
press on force mechanisms locked and firmly
attached.
S17
1
2
4
4
3
2
3
2
Use a Hex-head and Phillips-head screwdriver
screwed the DVI , D-SUB and HDMI connectors
(No.1~4 Hex Nut screws
S14
1
1
Size=M3x8;Torque=6.5 0.5KGFxCM).
(No.5 screw size=M3x8;
Torque=6.5 0.5KGFxCM).
Assemble the stand upper side to the rear cover
through the way of screwing 4 screws till both
units firmly attached.
S18
1
2
5
(No1~4 Screw Size=M4x10; Torque=13
1KGFxCM).
3
4
Use a Phillips-head screwdriver screwed the
No.1~2 screws. (No1~2 screw size=M3x6;
Torque=5~7KGFxCM).
S15
2
1
1
2
3
4
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15
ACER G24
4. Assembly and Disassembly Procedures (continued)
Assemble the hinge cover into both two sides
Take two cushion foams; one is held the above
side of LCD monitor, and another is held the
below side.
S19
S23
Stick a screen card on the front bezel with two
tapes.
S20
Put accessories of stand, DVI cable, and
user’s manual ,power cable on specific
positions as photo below.
S24
PUT CABLE IN THIS POSITION
Stick Vista and TC003 label on the correct
position the same as below photo
S21
PUT USER S
MANUAL IN THIS
POSITION
Move previous assembled parts into the carton then
stick Vista and feature label on the carton then
packing the carton
S25
Take a LDPE+EPE bag to cover the LCD
monitor.
S22
FEATURE LABEL
VISTA LABEL
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ACER G24
16
4. Assembly and Disassembly Procedures (continued)
4.2 Disassembly procedures
Open the carton with a proper tool.
S1
Put returned unit on a protective cushion,then
S4
remove LDPE+EPE bag.
Tear off tapes to remove the screen protector
card then turn over the LCD monitor (screen
faced down),
FEATURE LABEL
VISTA LABEL
Take out all accessories including D-SUB cable
power cable, DVI cables, user’s manual, and
packing material from the carton.
S2
(Note: It depends on whether users returning
the accessories.)
Disassemble the stand cover.
PUT CABLE IN THIS POSITION
S5
PUT USER S
MANUAL IN THIS
POSITION
Take off two cushion foams
Use a Phillips-head screwdriver unscrew 4 screws
to release the stand base.
S3
S6
(No1~4 Screw Size=M4x10;
Torque=13 1KGFxCM).
2
1
3
4
Turn over the LCD monitor (screen faced up).
S7
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17
ACER G24
4. Assembly and Disassembly Procedures (continued)
Hold the one upside corner of the front bezel after
separating the upside of the front bezel
Using properly force to pull up front bezel that will
let the locking mechanism of left side, right side
and down side separated
Put the dissembled monitor closed to by myself
RIGHT SIDE
S9
S8
D
OWN
U
P
S
I
D
E
S
I
D
E
LEFT SIDE
Wedge your finger between the front bezel and
the panel, then pry up on the front bezel to
disengage the locking mechanism.
Hold one side of down side that had been
separated from front bezel
Use properly force to pull up front bezel
S10
Insert steel rule between panel and front bezel
.Using properly force to let the locking
mechanism of front bezel and rear cover
separated
Separating all of the locking mechanism of the
front bezel in turn
Unhook the key function board from front bezel,
disconnect the key function cable
S11
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ACER G24
18
4. Assembly and Disassembly Procedures (continued)
Use a Hex-head screwdriver unscrewed 5 screws to
Unplug 6 lamp cables
S15
S12
release the DVI ,D-SUB and HDMI connectors
(No1~4Hex Nut screws
Size=M3x8;Torque=6.5 0.5KGFxCM).
(No.5 screw size=M3x8; Torque=6.5 0.5KGFxCM).
1
2
5
3
4
Disconnect the FFC cable to the connector of
panel.
S16
Use finger to push the lock according to arrow
direction then take out the FFC cable
Use a Phillips-head screwdriver unscrewed the
No.1~2 screws to lease power plug
S13
(No1~2 screw size=M3x10; Torque=5~7KGFxCM).
1
2
Use a Phillips-head screwdriver unscrewed the
No.1~4 screws to disassemble the LCD panel
and bracket chassis module.
S14
Take out lamp cables right through the No.1-3
square holes and separate the bracket chassis
module and LCD panel apart.
S17
(No1~4 screw size=M3x6;
Torque=2.5
KGFxCM).
1
2
1
2
3
4
3
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19
ACER G24
4. Assembly and Disassembly Procedures (continued)
Use a Phillips-head screwdriver unscrewed the
Examine the panel surface accoring to inspection
criteria. Put it aside.
S18
S21 No.1~4 screws to release the interface board.
(No1~4 screw size=M3x6; Torque=9~10KGFxCM).
2
3
1
4
Disconnect the cable from inverter board
Use a Phillips-head screwdriver unscrewed the
S19
No.1~8 screws
(No1~6 screw size=M3x4; Torque=9~10KGFxCM).
(No7~8 screw size=M3x6; Torque=5~7KGFxCM).
Remove inverter shielding bracket
Use a Phillips-head screwdriver unscrewed the
No.1~5 screws to disassemble the power board.
(No 1~4 screw size=M3x6; No 5 screw
S22
size=M4x8; Torque=9~10KGFxCM).
4
8
7
1
2
5
1
3
2
4
6
5
3
Use a Phillips-head screwdriver unscrewed the
No.1~4 screws
Disconnect all of the cable
S20
S23
(No1~4 screw size=M3x6; Torque=9~10KGFxCM).
Remove the inverter board
P301
2
3
1
4
P802
CN01
P803
P303
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ACER G24
20
5. Troubleshooting
5.1 No display on the screen (Screen is black and colour of LED is amber.)
Does OSM display upon pressing
the “MENU” button?
NG
Proceed to “5.5 Abnormal OSM display” section.
OK
Check if the sync signal output
from connected computer and the
video cable is connected properly
Input the sync signal of computer, or change to a
standard shipped cable for cross test.
NG
OK
Proceed to “5.4 Abnormal Screen” section.
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21
ACER G24
5. Troubleshooting (continued)
5.2 Nothing displays on the screen (Screen is black and colour of LED is blue.)
Check if the backlight is
slightly lightened from upper
corners (right/left) of LCD
panel
NG
Proceed to “5.3 Checking the backlight unit” section
OK
1. Change pattern of video signal outputs from
the PC host to optimum resolution.
2. Reconnect the video cable.
Does RGB video
signals output
from connected PC host?
NG
3. Cross-test the other workable video cable.
OK
Failure Point
The cable is disconnected.
Check if OSM menu
is displayed upon pressing the
“MENU” key
Check if video signal cable
is connected properly between
LCD monitor and PC host
NG
NG
OK
Proceed to “5.4 Abnormal Screen” section.
OK
Failure Point
Check if 3.3V is
supplied from I301 pin2; 2.5V is
supplied from I303, pin2, and
the 1.8V power is supplied from
I302 pin2.
Check if the
Voltage on I301, I303,
I320 pin3 is high DC
level at 5V.
NG
NG
1. Printed wire is broken between
P301 pin1, pin2, pin3, pin4 and
I301, I303, I320.
2. Check power board
OK
OK
Failure Point
I301, I302, I303, or I320 is
damaged.
Check all LVDS signal pins;
output from I314
OK
NG
Failure Point
Failure Point
Printed wire is broke or short
between P306, I314
1. The cable is broke between
P306 and LCD panel.
2. LCD panel is defected.
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ACER G24
22
5. Troubleshooting (continued)
5.3 Check the backlight unit
Failure Point
Check the BKLT_EN signal of
rectangle input P301 pin11 at TTL
high level.
Does the I306 pin16
output a TTLvoltage level
at “H” status? <or> Is BKLT_EN
signal of the rectangle being
output?
Printed wire is broken
between I306 pin16 and
P301.
NG
NG
OK
OK
NG
Failure Point
Check the PWM signal
supplied from I314
pin251 is a PWM,
1. Printed wire is broke
between I314 pin251 and P301.
2. I314 is defected.
pulse-width modulation.
OK
Failure Point
Inverter of LCD module is defected.
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23
ACER G24
5. Troubleshooting (continued)
5.4 Abnormal Screen:
Failure Point
Check R.G.B video signals
output from PC host
to D-Sub R.G.B connector
1. Check connected PC host if there’s no R.G.B
signals output.
2. Video signal cable disconnected.
NG
OK
Failure Point
Green, Blue, Red signals are flow in the same
path. In the case, the Red signal is example.
1. Printed wire is broken between D-Sub [R] and
I314 pin45.
Check the R.G.B signals
on I314 pin40, pin42, and pin45 which
should have voltage level at 0.7Vpp
max.
NG
2. R391 is short.
3. C356 is open.
4. R390 is open.
OK
Failure Point
Check all LVDS signal pins
of I314 whether if
output correct signals.
1. The I314 is defected.
2. Printed wire is broken between I314 and P306.
NG
OK
Proceed to “5.8 Checking the resolution change
IC movement” section.
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ACER G24
24
5. Troubleshooting (continued)
5.5 Abnormal OSM display - OSD Adjusment Problem
Failure Point
Check the input TTL level
whether if it was altered upon
pressing the function keys.
1. Printed wire is broken between P303 pin 2 and I306 pin 87.
2. Printed wire is broken between P303 pin 3 and I306 pin 88.
3. Printed wire is broken between P303 pin 4 and I306 pin 89.
4. Printed wire is broken between P303 pin 5 and I306 pin 90.
5. Printed wire is broken between P303 pin 6 and I306 pin 22.
6. Printed wire is broken between P303 pin 7 and I306 pin 1.
7. C325, C326, C327, C328, C329,C330 is short.
8. R339, R340, R341, R342, R343, R346, R347, R348,
R349, R350 ,R351, R352 is short or open.
NG
OK
9. I306 is defected.
(Note: more than one components defected is possible.)
Proceed to “5.4 Abnormal Section”
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25
ACER G24
5. Troubleshooting (continued)
5.6 Abnormal Plug and Play Operation
5.6.1 Abnormal DDC2 (D-SUB)
Failure Point
Confirm the output of serial
data on I312 pin6 synchronize SCLK at
TTL level
NG
I312 is defected
OK
Failure Point
1. The host machine isn’t communicating in DDC2 mode.
2. The video cable may have defected or may not be established
connection for DDC.
3. The I312 pin6 and P304 pin15 may have no signal or incorrect.
4. The R374, R377 is open.
5. I312 pin6 is short.
6. The input source cable is defected.
7. Check I312 pin5 signal whether if correct.
5.6.2 Abnormal DDC2 (DVI)
Failure Point
Confirm the output of serial
data on I313 pin6 synchronize SCLK at
TTL level
NG
I313 is defected
OK
Failure Point
1. The host machine isn’t communicating in DDC2 mode.
2. The video cable may have defected or may not be established
connection for DDC.
3. The I313 pin6 and P305 pin6 may have no signal or incorrect.
4. The R393 or R397 is open.
5. I313 pin6 is short.
6. The input source cable is defected.
7. Check I313 pin5 signal whether if correct.
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ACER G24
26
5. Troubleshooting (continued)
5.7 Checking the interface circuit of sync signal
5.7.1 Checking the control circuit of horizontal sync pulse
Failure Point
1. Video cable is defected.
Check the horizontal
sync signal on I314 pin46
TTL level
2. Printed wire is broken between P304 pin13 and I314 pin46.
3. FB305, R364, R363 is open.
4. R371, C336, D305 is short.
NG
5. I311 is defected.
OK
Proceed to “5.8 Checking the
resolution change IC movement”
section
5.7.2 Checking the control circuit of vertical sync pulse
Failure Point
1. Video cable is defected.
2. Printed wire is broken between P314 pin14 and I314 pin47.
3. FB306, R368, R369 is open or more than one component.
4. R370, C335, D303 is short.
Check the vertical sync
signal on I314 pin47 TTL level
NG
5. I311 is defected.
OK
Proceed to “5.8 Checking the resolution
change IC movement” section
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27
ACER G24
5. Troubleshooting (continued)
5.8 Checking the resolution change IC movement
Is there +3.3V
Supplied on I314 pin107,
pin48, pin61, pin250, pin12, pin70,
pin170, pin184, pin203, pin216,
pin236, pin252, pin20, pin28,
pin38, pin19, pin37,
Proceed to “5.9 Checking the DC/DC converter
circuit” section
NG
pin131?
OK
Is there +1.8V
supplied on I314 pin16, pin22,
pin50, pin2, pin78, pin96, pin143,
pin160, pin181,
Proceed to “5.9 Checking the DC/DC converter
circuit” section
NG
pin225
OK
Failure Point
Is 14.318MHz
clock input to I314 pin35
and pin36 at TTL level
during power on?
Is 14.318MHz clock output
from X302 pin1 at TTL level
during power on?
NG
X302 is defected.
OK
Failure Point
Print wire is broken between X302
pin1 and I314, pin36
Is +3.3V supplied to
I314 pin9 at low level
(Reset again)?
NG
Failure Point
OK
Check the output
of 3.3V “H” pulse from
I306 pin12
NG
I306 is defected.
Failure Point
I314 is defected.
OK
Failure Point
Print wire is broken between I306
pin12 and I314 pin9.
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ACER G24
28
5. Troubleshooting (continued)
5.9 Checking the DC/DC converter circuit
Failure Point
Printed wire is broken between
P301 pin1, pin2, pin3, pin4 and
I301, I303, I320 pin3.
Check if the 5V is output
from P301 pin1, pin2, pin3, pin4
to I301, I303, I320 pin3.
NG
OK
Is the output
FB301 being supplied to
I301, I303, I320 pin3?
Check if the 3.3V, 2.5V
and 1.8V line voltage is output
from I301, I302, I303 pin2
NG
OK
NG
OK
Failure Point
Failure Point
Failure Point
Printed wire is broken
between I301, I302, I303
pin2, and I314 power supply
pin.
Printed wire is broken
between I301, I303, I320
pin3 and output of FB301
I301, I303, I320 is defected.
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29
ACER G24
5. Troubleshooting (continued)
5.10 Checking the inverter board circuit
Does 22V output pin
have voltage around 20V?
Does On/Off pin have voltage over 3V?
Does brightness pin have voltage in
the range of 0V~3.2V?
Check F101, I101, Q110, Q111, Q112,
Q113 and repair them if be damaged
NG
OK
Does I101 pin6 have 5V output?
NG
Check I101 and repair them if be damaged
Check CCFL and repair if damage.
Check I101 and repair if damage
Repair 101
OK
Does P101, P102, P103,
P104 be firmly connected?
NG
NG
NG
OK
NG
OK
Does I101 pin4, pin5
have triangle pulse?
OK
Does I101 pin1 have soft
start edge up to 2.4V?
OK
Does I101 pin8 have
voltage up to 1.2V from output
detection?
Check D102, D103, D107, D108, D114,
D115, D112, D113 and repair if damage.
NG
Does
half bridge (Q104,
Q105, Q106, Q107, Q108)
work successful?
Check Q104, Q105, Q106, Q107, Q108 and
repair them if damage
OK
Does transformer
(T101, T102) have output AC
voltage to P101, P102, P103,
P104?
NG
Check T101 and T102 if damage
OK
Check panel module if damage
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ACER G24
30
5. Troubleshooting (continued)
5.11 HDMI signal check
5.11.1 No video
Failure Point
Check the TMDS signal
from computer input on
HDMI connector
NG
1.Check the host PC to see if there’s no TMDS
signal output
2.HDMI cabled disconnected. Reconnect the
cable till firmly connected
3.P311 is disconnected. Reconnect the cable
till firmly connected
OK
Failure Point
Check the TMDS signal of
I322
OK
I322 was damaged.
NG
Failure Point
I314 was damaged
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31
ACER G24
6. Firmware Upgrade Process
Hardware Configuration
Select AUTO DETECT button that will automatically detect
the device then shows “OK” on the right side.
S2. Press [Connect] button.
Connect printer
cable between
PC and kit
Connect VGA
cable between
monitor and kit
Mstar ISP Utility Configuration:
Launch the utility of “ISP_Tool Winbond 0315.exe”
There s a Dialog window shown on the screen. It is the
meaning of connection successful .
Press Config button
Check the video cable and ISP board (D-sub to Printer
port) between LCD monitor to PC host to see if it
disconnected.
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ACER G24
32
6. Firmware Upgrade Process (continued)
Press [Run] button and waiting for firmware upgrade
completed .The screen will show “PASS”
Press [Device] button to select the “ WP pin pull to high
during ISP “
Press [Read] button.
Check firmware version
Turn off the power,then press force on “ POWER ” and “ E ”
button at the same time then press on “ MENU ”button to
enter factory mode
1. Press Read folder to browse firmware image.
2.The position according to where the firmware be put
Note: Please pay attention ,Don’t change any parameter
which is measured by precise machine before shipping out
1
2
Press [Auto] button
When you writing F/W face on interrupting that cause monitor
shut down .
You can unplug AC power then press “AUTO”button and plug
AC power at the same time to solve this problem then re-write
F/W again.
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33
ACER G24
7. Writing EDID Process
2. Writing VGA/DVI Process
1 Writing EDID Procedure
Chose the folder:”Acer-VGA&DVI” then double click
Hardware Configuration:
1.)Connect the PRINTER PLUG of DDC FIXTURE with the
printer port of Desktop PC. (Refer to figure 1)
2.)Plug USB A PLUG of DDC FIXTURE to USB socket of
Desktop PC (Refer to figure 2)
Select the “Acer-M1&M3-XPEDID-DVI-.exe” to execute it
3.)Extend the DVI cable on DVI EXTENDING SOCKET of DDC
FIXTURE. (Refer to figure 3)
4.1)Connect the D-sub plug of Chroma with D-SUB PLUG of
DDC FIXTURE (Refer to figure 4)
4.2) Take a video cable then connect the D-SUB PLUG and the
D-sub socket of monitor. (Refer to figure 5)
5.)Connect the extended DVI cable to DVI socket of monitor
(Refer to figure 5)
6.)Re-confirm all the connectors are connected well.
DVI EXTENDING
SOCKET
D-SUB PLUG
3.Select Model: Key in password”cedid” then select model
which one you want to write EDID code that it depends on
panel type.
USB A
SOCKET
PRINTER PLUG
DVI EXTENDING
USB A
SOCKET
PLUG
2
1
3
4
6
5
cedid
CAUTION: The timing of Chroma shall be setup at T254/ P41
before data recording. the detail setting parameter from
chroma .Please See below photo
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ACER G24
34
7. Writing EDID Process (continued)
4. Choose "WRITE" from menu then select "Scan S/N And
Write EDID And Test DDC”
Writing HDMI Process
Chose the folder:”Acer-HDMI” then double click
Select the “acer HDMI.EXE” to execute it
According to the previous process(step3-step6) to write
HDMI-EDID.
5. Key in series number(22 characters) in the input column
Press write button after key in S/N
6. When EDID was written successfully that will show below
message on the screen
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1
2
3
4
1
2
3
4
1
3
2
3
2
10
1
4
5
3
1
3
2
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4
1
6
7
3
2
TP9
TP10
TP11
TP12
6
7
3
2
6
7
3
2
6
7
3
2
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TP81
TP82
R333
4.7K(NC)
R334
TP100
TP101
4.7K(NC)
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
8
P3.7/RD
XTAL2
XTAL1
NC
P1.7
P1.6
7
6
P1.5
1
P1.4
A18
A17
A16
A15
TP28
TP29
TP30
TP31
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
AVSS
VSS
P1.3/PWM3
P1.2/PWM2
P1.1/PWM1
P1.0/PWM0
P4.2
VSS
NC
P4.0
TRST
TDO
R481
R482
R483
R484
R485
0(NC)
0(NC)
0(NC)
0(NC)
0(NC)
TP431
TP432
TP433
TP434
TP435
P7.0
TRST
P7.1
TDO
TD
P7.2
TD
TMS
P7.3
TMS
TCK
P6.0
TCK
UP
P6.1
P7.7
DOWN
MENU
SELECT
P6.2
P7.6
P6.3
P7.5
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
NC
P7.4
AVDD
VDD
VDD
P0.0/AD0
P0.1/AD1
P0.2/AD2
NC
NC
NC
NC
P303 JWT-A2001WV2-10p
1
3
1
3
16
32
10
20
VSS
VCC
GND
VCC
3
5
1
3
1
3
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17
16
D306
NC
D304
NC
MMSZ5232B
D305
MMSZ5232B
D303
MMSZ5232B
D308
D312
NC
MMSZ5232B
D311
D310
NC
MMSZ5232B
D309
D313
MMSZ5232B
TP144
TP143
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D341
MMSZ5232B
D333
MMSZ5232B
D328
D329
NC
MMSZ5232B
D330
D331
NC
MMSZ5232B
D315 MMSZ5232B
D347
MMSZ5232B
TP483
TP484
D332
MMSZ5232B
TP182
TP183
4
8
GND
VCC
TP490
TP491
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38
19
AVDD_PLL
AVDD_PLL
37
AVDD_MPLL
AVDD_PLL2
AVDD_APLL
AVDD_LPLL
AVDD18_DVI
AVDD18_ADC
131
16
250
22
3
10
11
17
18
25
31
34
49
60
69
79
87
95
103
108
111
129
130
141
144
161
171
182
183
204
215
226
249
253
235
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
50
48
61
AVDD_ADC
AVDD_ADC
107
AVDD_MCLK
20
28
AVDD_DVI
AVDD_DVI
2
78
96
143
160
181
225
VDDC
VDDC
VDDC
VDDC
VDDC
VDDC
VDDC
88
VDDM
VDDM
VDDM
VDDM
VDDM
VDDM
VDDM
VDDM
105
117
128
134
142
151
159
12
70
VDDP
VDDP
VDDP
VDDP
VDDP
VDDP
VDDP
VDDP
170
184
203
216
236
252
248
247
246
245
244
243
242
241
240
239
GPO[9]
GPO[8]
GPO[7]
GPO[6]
GPO[5]
GPO[4]
GPO[3]
GPO[2]
GPO[1]
GPO[0]
257
PAD GND
238
237
234
233
232
231
230
229
228
227
224
223
222
221
220
219
218
217
FSP
BSP
118
119
120
121
122
123
124
125
126
127
132
133
MADR[0]
MADR[1]
MADR[2]
MADR[3]
MADR[4]
MADR[5]
MADR[6]
MADR[7]
MADR[8]
MADR[9]
MADR[10]
MADR[11]
BB3N
BB3P
BB2N
BB2P
BB1N
BB1P
BB0N
BB0P
BG3N
BG3P
BG2N
BG2P
BG1N
BG1P
LVB0M
LVB0P
31
32
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1
1
4
2
3
6
5
11
9
12
10
GND
GND
GND
GND
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8
9
AGND
VA
1
2
1
2
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2
1
2
2
2
2
2
2
2
2
2
2
2
2
1
1
2
1
2
2
2
1
1
2
1
2
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