This manual contains information about maintenance and service of acer products. Use this manual to
perform diagnostics tests, troubleshoot problems, and align the acer product.
1.1. Trademark
The following terms are trademarks of Acer Inc. :
Acer
Importance
Only trained service personnel who are familiar with this Acer Product shall perform service or
maintenance to it. Before performing any maintenance or service, the engineer MUST read the “Safety
Note”.
- 3 -
2. Introduction
This section contains general service information, please read through carefully. It should be stored for
easy access place for quick reference.
2.1. RoHS (2002/95/EC) Requirements
– Applied to all countries require RoHS.
The RoHS (Restriction of Hazardous Substance in Electrical and Electronic Equipment Directive) is a legal
requirement by EU (European Union) for the global electronics industry which sold in EU and some counties
also require this requirement. Any electrical and electronics products launched in the market after June 2006
should meet this RoHS requirements. Products launched in the market before June 2006 are not required to
compliant with RoHS parts. If the original parts are not RoHS complaints, the replacement parts can be non
ROHS complaints, but if the original parts are RoHS compliant, the replacement parts MUST be RoHS
complaints.
If the product service or maintenance require replacing any parts, please confirming the RoHS requirement
before replace them.
2.2. Safety Notice
1. Make sure your working environment is dry and clean, and meets all government safety requirements.
2. Ensure that other persons are safe while you are servicing the product.
DO NOT perform any action that may cause a hazard to the customer or make the product unsafe.
3. Use proper safety devices to ensure your personal safety.
4. Always use approved tools and test equipment for servicing.
5. Never assume the product’s power is disconnected from the mains power supply. Check that it is disconnected before opening the product’s cabinet.
6. Modules containing electrical components are sensitive to electrostatic discharge (ESD). Follow ESD safety
procedures while handling these parts.
7. Some products contain more than one battery. Do not disassemble any battery, or expose it to high
temperatures such as throwing into fire, or it may explode.
8. Refer to government requirements for battery recycling or disposal.
2.3 .Compliance Statement
Caution: This Optical Storage Product contains a Laser device. Refer to the product specifications and your
local Laser Safety Compliance Requirements.
2.4. General Descriptions
This Service Manual contains general information. There are 3 levels of service:
Level 1: Cosmetic / Appearance / Alignment Service
Level 2: Circuit Board or Standard Parts Replacement
Level 3: Component Repair to Circuit Boards
- 4 -
3. Product Overview
Feature items
Specifications
Remark
Panel supplier & module name
LGD LM215WF1-TLA1
AUO M215HW01
TN, Normally white
Screen diagonal
21.5”W
495.5(H) x 292.2(V)
Display Format
1920(H) x 1080 (V)
Panel Display information
Pixel Pitch
LGD: 0.248 mm x 0.248 mm
SEC: 248.25 um x 248.25
um
Test Condition: Set Contrast
at 50, Brightness at 100,
Color at User preset
Luminance
300 cd/m2 (typ.),250 cd/m2
(min)
Test Condition: Set Contrast
at 50, Brightness at 100,
Color at User preset
AC power input
Yes
90-264 Volts, 47-63 Hz.
DC power input (with AC power adapter)
No DPMS supported
Yes
<2W
LED indicator for power status showed
Yes
White/Amber
OSD for control & information supported
Yes
3.1. Introduction
G225HQ is defined as our new 21.5”W model in ACER V series which will be the ACER project in Qisda.
G225HQ is defined as 21.5”W LCD Monitor supports 1920(H) x 1080(V) resolution with DPMS (Display Power
Management System) and ACER eColor function. There are double input types, D-sub and DVI. G225HQ
adopts LGD panel LM215WF1-TLA1, AUO panel M215HW01 . G225HQ has included 1W+1W speaker.
G225HQ also support ACM 50000:1.
The features summary is shown as below,
*All panel spec. in Q201 definition depends on the variance of panel source.
*All spec. of monitor need to warm up at least 1hr.
* To test the “Contrast Ratio” and “Luminance” functions, the color status must be “User preset” mode.
* 1. “Contrast Ratio”: Set “brightness” at 100, and “contrast” at 50.* 2. “Luminance”: Set “brightness” at 100, and “contrast” at 100.
- 5 -
Multi-language supported for OSD
Yes
EMEA
Non-EMEA
Buttons control supported
Yes
6 buttons including 1
monitor power on/off
control button.
Flywheel control supported
No Scaling function supported
Yes
Auto adjustment function supported
Yes
“Auto-Key” function
DDC function supported (EDID ver. 1.3)
Yes
DDC2B
DDC-CI support version 1.1 or later
Yes
DDC-CI
Audio speakers supported
Yes
Audio Jack (input connector) supported
Yes
Line-in connector
Earphone Jack (Output connector)
supported
No
Microphone function supported
No Mechanical Tilt base design
Yes
From -5 to +23 degree
VESA wall mounting design
Yes
Mechanical Rotate design
No Mechanical Lift base design
No Kensington compatible lock design
Yes
- 6 -
Item
Condition
Spec
OK
N.A
Remark
Input Voltage range
Universal input full range
90~264VAC /47~63Hz
Input Current range
90 ~ 264VAC
< 2.0 Arms
Power Consumption
Normal “On” operation
< 52 W
LED: Blue
DPMS
DPMS “Sleep” state
< 2 W
LED: Amber
DPMS
DPMS “Off” state
< 1 W
LED: OFF
Inrush Current
110 VAC
220 VAC
< 30 A (peak)
< 60 A (peak)
Cold-start
Earth Leakage Current
264 VAC/50Hz
< 3.5 mA
Hi-Pot
1. 1500VAC, 1 sec
2. Ground test: 30A,
1sec
Without damage
< 0.1 ohm
(on-line test)
(in-lab test)
Power Line Transient
IEC1000-4-4
1KV
IEC1000-4-5 (Surge)
Common: 2KV,
Differential: 1KV
CCFL operation range
90 ~ 264VAC
LGD: 3~8mA
SEC : 4~8mA
Depends on panel
source
CCFL Frequency
90 ~ 264VAC
40KHz ~ 60KHz
Depends on panel
source
Power cord
Color: Black
Length: 1800 +/- 50 mm
3.2. Operational Specification
3.2.1 Power supply
- 7 -
3.2.2 Signal interface
Item
Condition
Spec
OK
N.A
Remark
Signal Cable
15-pin D-Sub
Color: Black
Length: 1800 +/- 30 mm
24-pin DVI-D
Color: Black
Length: 1800 +/- 50 mm
Pin assignment
15-pin D-sub connector
See Note-1
For 15-pin D-sub
24-pin DVI-D connector
See Note-2
For 24-pin DVI-D
19-pin HDMI connector
See Note-3
For 19-pin HDMI
Analog input
Signal type
Separate analog R/G/B
For 15-pin D-sub
Level
700 mV (peak to peak)
Impedance
75 Ohms +/- 1.5 Ohms
Sync input
Signal type
Separate H/V-sync
(Positive/Negative)
For 15-pin D-sub
Level
Logic High: 2.4V ~ 5.5V
Logic Low: 0V ~ 0.5V
(TTL level)
Refer to VESA VSIS
Standard V1R1
Impedance
Minimum 2.2KΩ(pull
down)
10KΩ for application
Sync Pulse Width (SPW)
0.7μs < H-SPW
1H < V-SPW
Digital input
Level
600mV for each
differential line
Impedance
50 Ohm TDR Scan
needed for DVI cable and
interface board
Pin
Signal Assignment
Pin
Signal Assignment
1
Red video
9
PC5V (+5 volt power)
2
Green video
10
Sync Ground
3
Blue video
11
Ground
4
Ground
12
SDA
5
Cable Detected
13
H-Sync (or H+V)
6
Red Ground
14
V-sync
7
Green Ground
15
SCL
8
Blue Ground
Note-1: The pin assignment of 15-pin D-sub connector is as below,
- 8 -
Note-2: The pin assignment of 24-pin DVI-D connector is as below,
Pin
Signal Assignment
Pin
Signal Assignment
1
TMDS RX2-
13
Floating
2
TMDS RX2+
14
+5V Power
3
TMDS Ground
15
Ground(Cable Detect)
4
Floating
16
Hot Plug Detect
5
Floating
17
TMDS RX0-
6
DDC Clock
18
TMDS RX0+
7
DDC Data
19
TMDS Ground
8
Floating
20
Floating
9
TMDS RX1-
21
Floating
10
TMDS RX1+
22
TMDS Ground
11
TMDS Ground
23
TMDS Clock+
12
Floating
24
TMDS Clock-
- 9 -
Note-3: The pin assignment of 19-pin HDMI connector is as below,
Item
Condition
Spec
OK
N.A
Remark
Max. support Pixel rate
173 MHz
Both for analog and
digital inputs
Max. Resolution
1920 x 1080
Both for analog and
digital inputs
Rise time + Fall time
< 5 ms
(50% of minimum pixel
clock period)
1920x1080 @ 60Hz
(max. support timing)
Settling Time after
overshoot /undershoot
< 5% final full-scale value
Refer to VESA VSIS
Standard V1R1
Note:Pin 11 is used as Cable Detect.
3.2.3 Video performance
- 10 -
Overshoot/Undershoot
< 12% of step function
voltage level over the full
voltage range
Refer to VESA VSIS
Standard V1R1
Item
Condition
Spec
OK
N.A
Remark
Horizontal
31-83 KHz
Vertical
56-76 Hz
HDMI supports 50Hz
Item
Condition
Spec
OK
N.A
Remark
DDC channel type
DDC2B
EDID
Version 1.3
Refer to S/W spec.
document to see the
detailed EDID data
definition.
DDC-CI
Version 1.1 or Later
Refer to S/W spec
3.2.4 Scan range
3.2.5 Plug & Play DDC2B DDC-CI Support
- 11 -
3.2.6 Support Timings
Mode
Resolution
(active dot)
Resolution
(total dot)
Horizontal
Frequency (KHz)
Vertical
Frequency (Hz)
Nominal Pixel
Clock (MHz)
640x480@60Hz
800 x 525
31.469
59.941
25.175
640x480@72Hz
832 x 520
37.861
72.809
31.500
MAC
640x480@66.66Hz
864x525
35
66.66
30.24
VESA
720x400@70Hz
900x449
31.469
70.087
28.322
SVGA
800x600@56Hz
1024 x 625
35.156
56.250
36.000
800x600@60Hz
1056 x 628
37.879
60.317
40.000
800x600@72Hz
1040 x 666
48.077
72.188
50.000
1024x600@60Hz
1312x622
37.320
60.000
48.964
XGA
1024x768@60Hz
1344x806
48.363
60.004
65.000
1024x768@70Hz
1328x806
56.476
70.069
75.000
VESA
1152x864@75Hz
1600x900
67.5
75
108
1280x960@60Hz
1800x1000
60
60
108
SXGA
1280x1024@60Hz
1688x1066
63.981
60.020
108.000
VESA
1280x720@60Hz
1650x750
44.955
59.940
74.176
WXGA
1280x800@60Hz
1680x831
49.702
59.810
83.500
1360x768@60Hz
1792x795
47.712
60.015
85.500
WXGA+
1440x900@60Hz
1904x931
55.935
59.887
106.500
WSXGA+
1680x1050@60Hz
2240*1089
65.290
59.954
146.250
UXGA
1600x1200@60Hz
2160x1250
75.000
60.000
162.000
1920x1080@60Hz
2576x1120
67.158
59.963
173.000
1920x1080@60Hz
2200x1125
67.500
60.000
148.500
1920x1080@60Hz
2080x1111
66.587
59.934
138.500
Note:
3.3. Operational & Functional Specification
3.3.1 Video performance
- 12 -
1. Show “Input Not Supported” warning message.
When Vertical Frequency is over 76Hz or under 56Hz, the display is Black and showing “Input Not
Supported” warning message. (Some video timings are except for PAL, 50Hz signals.)
2. If Hf /Vf is set in the range of 31KHz~83KHz and 56Hz ~76Hz (not including some video timing), and
Pixel Clock is set in the range of 25.175MHz~173MHz(DVI and HDMI input port 165MHz for SingleLink), but is not the above Resolution, then it will display the nearest mode.
3. When digital input 1680x1050@75Hz and 1920x1080@60Hz_CVT, because of TMDS Pixel Clock is
setting in the range of 25MHz~165MHz, the source may use Dual-Link signal to transmit the timing.
This model can only support Single-Link to receive the information of half-of- Dual-Link, the display
may be abnormal.
*All spec. of monitor need to warm up at least 1hr.
Item
Condition
Spec
OK
N.A Remark
Resolution
Any input resolution modes
which are under
1920x1080
1920x1080
Contrast ratio
700(min),1000(typ.)
Test Condition: Set
Contrast at 50,
Brightness at 100,
Color at User preset.
Brightness
At R/G/B saturated
condition
300 cd/m2 (typ.),250 cd/m2
(min)
Test Condition: Set
Contrast at 50,
Brightness at 100,
Color at User preset.
Response time
Rising + Falling time
On/off:5 ms
(typ.),10ms(max)
Test Equipment:
Westar TRD 100 or
equal level
equipment ;
Viewing angle
At Contrast ratio = 10
R/L: 170 degrees (typ.)
140 degrees (min)
At Contrast ratio = 10
U/D:160 degrees (typ.)
130 degrees(min)
CIE coordinate of White
(0.313, 0.329) +/- (0.03,
0.03)
Display colors
16.7 Millions colors
6 bit+Hi-FRC
Item
Condition
Spec
OK
N.A Remark
Resolution
Any input resolution modes
which are under
1920x1080
1920x1080
Contrast ratio
600(min),1000(typ.)
Test Condition: Set
Contrast at 50,
Brightness at 100,
Color at User preset.
Brightness
At R/G/B saturated
condition
300 cd/m2 (typ.),240 cd/m2
(min)
Test Condition: Set
Contrast at 50,
Brightness at 100,
Color at User preset.
Response time
Rising + Falling time
On/off:5 ms (typ.),8ms(max)
Test Equipment:
Westar TRD 100 or
equal level
equipment ;
Viewing angle
At Contrast ratio = 10
R/L: 170 degrees (typ.)
150 degrees (min)
At Contrast ratio = 10
U/D:160 degrees (typ.)
140 degrees(min)
CIE coordinate of White
(0.313, 0.329) +/- (0.03,
0.03)
Display colors
16.7 Millions colors
6 bit+Hi-FRC
LGD LM215WF1-TLA1/TLB1
AUO M215HW01 V0/V1
- 13 -
3.3.2 Brightness Adjustable Range
Item
Condition
Spec
OK
N.A Remark
Brightness adjustable
range
At default contrast level
(saturate point) & Fullwhite color pattern
After Mass production
under 1dBuv for constant
measure. Besides DNSF
and VCCI class-2 are
optional.
EN55022 class B
Item
Condition
Spec
OK
N.A Remark
MTBF Prediction
Refer to MIL-217F
> 60,000 Hours
Excluding
CCFL
CCFL Life time
At 25±2℃, under 7.0mA
40,000 Hours (min)
See Note-4
Item
Condition
Spec
OK
N.A
Remark
Preamp + Power amp
(1)Output power
1 Wrms/CH @ 1KHz
(2)THD (@ 1W)
<1%
(3)S/N ratio >40dB
Speaker Driver
(1)Nominal impedance
8 ohm
(2)Rated input power
1 W/CH
(3)Frequency response
180~20KHz SPL-10dB
(4)Output sound pressure
level
84 ± 3 dB (1W 0.5M)
(5)Dimension of box
284x60x27mm2
Audio Control
(1)Volume range
0 ~100 levels
(2)Mute On/Off
3.3.6 Electrostatic Discharge Requirements
3.3.7 EMC
3.3.8 Reliability
Note-4: CCFL lifetime is determined as the time at which brightness of lamp is 50%. The typical lifetime of
CCFL is on the condition at 7.0mA lamp current.
3.3.9 Audio performance
- 15 -
Item
Condition
Spec
OK
N.A Remark
LCD Panel Supplier
LGD
Panel type of Supplier
LGD LM215WF1 TLA1
Screen Diagonal
546.86mm(21.53”)
Display area
Unit=mm
476.64(H) x 268.11(V)
Physical Size
Unit=mm
495.6(H) x 292.2(V) x 16.5(D)
Weight
Unit=gram
2100 (typ.)
Technology TN type
Pixel pitch
Unit=um
248(H) x248 (W)
Per one triad
Pixel arrangement
R/G/B vertical stripe
Display mode
Normally White
Support color
16.7Millions colors
6 bit + HiFRC
Item
Condition
Spec
OK
N.A Remark
LCD Panel Supplier
AUO
Panel type of Supplier
AUO M215HW01
Screen Diagonal
546.86mm(21.5.”)
Display area
Unit=mm
476.64(H) x 268.11(V)
Physical Size
Unit=mm
495.6(H) x 292.2(V) x 16.35(D)
Weight
Unit=gram
2188 (typ.)
Technology TN type
Pixel pitch
Unit=um
248.25(H) x248.25 (W)
Per one triad
Pixel arrangement
R/G/B vertical stripe
Display mode
Normally White
Support color
16.7Millions colors
6 bit + HiFRC
Item
Unit
Conditions
Min.
Typ.
Max.
Remark
Viewing Angle
[degree]
[degree]
Horizontal (Right)
CR = 10 (Left)
140
170
-
-
[degree]
[degree]
Vertical
(Up)
CR = 10 (Down)
130
160
-
-
Contrast ratio
Normal Direction
700
1000
Response Time
[msec]
Rising Time
-
1.3
2.6
3.4. LCD Characteristics
3.4.1-1 The Physical definition & Technology summary of LCD panel
LGD LM215WF1 TLA1
AUO M215HW01
3.4.2-1 Optical characteristics of LCD panel
LGD LM215WF1 TLA1
- 16 -
[msec]
Falling Time
-
3.7
7.4
[msec]
Rising + Falling
- 5 10
Color / Chromaticity
Coordinates (CIE)
Red x 0.646
Red y 0.334
Green x
0.303
Green y
0.616
Blue x 0.147
Blue y 0.067
Color Coordinates (CIE)
White
White x
0.313
White y
0.329
Luminance Uniformity
[%]
9 points
measurement
75
White Luminance @ CCFL
7.0mA (center)
[cd/m2]
250
300
-
Crosstalk (in 75Hz)
[%]
1.5
* The test methods for the above items’ definition, please refer to the relative panel specification.
Item
Unit
Conditions
Min.
Typ.
Max.
Remark
Viewing Angle
[degree]
[degree]
Horizontal (Right)
CR = 10 (Left)
150
170
-
-
[degree]
[degree]
Vertical
(Up)
CR = 10 (Down)
140
160
-
-
Contrast ratio
Normal Direction
600
1000
[msec]
Rising + Falling
- 5 8
Color / Chromaticity
Coordinates (CIE)
Red x
0.618
0.648
0.678
Red y
0.309
0.339
0.369
Green x
0.252
0.282
0.312
Green y
0.573
0.603
0.633
Blue x
0.113
0.143
0.173
Blue y
0.040
0.070
0.100
Color Coordinates (CIE)
White
White x
0.283
0.313
0.343
White y
0.299
0.329
0.359
Luminance Uniformity
[%]
9 points
measurement
75
80
White Luminance @ CCFL
7.0mA (center)
[cd/m2]
240
300
-
Item
Condition
Spec
OK
N.A
Remark
Power button
Auto button(Exit button)
Right/Inc. button
Left/Dec. button
AUO M215HW01
3.5.1 User’s hardware control definition
- 17 -
Menu button
Mode button
Input Select button
E-Key button
Mute button
Item
Condition
Spec
OK
N.A
Remark
Auto Adjust
Auto-Geometry
Brightness
Contrast
Horizontal Position
Vertical Position
Pixel Clock
Phase
Color
Cool(9300K)
Warm(6500K)
User: Separate R/G/B
adjustment