Acer G225HQ User manual

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Product Service Manual –G225HQ
Service Manual for acer: G225HQ
P/N: 9J.11016.L1A
9J.11016.41A
Applicable for All Regions
Version: 001
Date:2009/9/7
Notice:
- For RO to input specific “Legal Requirement” in specific NS regarding to responsibility and liability
statements.
First Edition (Sept, 2009)
© Copyright Acer Corporation 2009. All Right Reserved.

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Content Index
1. About This Manual .............................................................................................................. 3
1.1. Trademark........................................................................................................................ 3
2. Introduction......................................................................................................................... 4
2.1. RoHS (2002/95/EC) Requirements.................................................................................. 4
2.2. Safety Notice.................................................................................................................... 4
2.3 .Compliance Statement..................................................................................................... 4
2.4. General Descriptions ....................................................................................................... 4
3. Product Overview................................................................................................................ 5
3.1. Introduction...................................................................................................................... 5
3.2. Operational Specification ................................................................................................. 7
3.3. Operational & Functional Specification .......................................................................... 12
3.4. LCD Characteristics....................................................................................................... 16
3.7. Pallet & Shipment .......................................................................................................... 19
3.8. Certification.................................................................................................................... 20
3.9 Packing........................................................................................................................... 22
4. Disassembly /Assembly.................................................................................................... 23
4.1. Exploded View............................................................................................................... 23
4.2. Disassembly /Assembly................................................................................................. 25
5. Level 1 Cosmetic / Appearance / Alignment Service......................................................... 35
5.1 Alignment procedure (for function adjustment)................................................................ 35
5.2 Software / Firmware Upgrade Process ........................................................................... 38
5.3 EDID Upgrade Procedure............................................................................................... 43
5.4 OSD Operation Guide..................................................................................................... 46
6. Level 2 Circuit Board and Standard Parts Replacement................................................... 50
6.1. Trouble Shooting Guide ................................................................................................. 50
6.2 Circuit Operation Theory................................................................................................. 56
6.3 Spare Parts List............................................................................................................... 59
Appendix 1 –Screw List / Torque.......................................................................................... 62
Appendix 2 –Physical Dimension Front View and Side view................................................ 65
Appendix 3 –I/F Board......................................................................................................... 67

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Abbreviations & Acronyms
1. About This Manual
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”.

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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

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3. Product Overview
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.
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
per one triad
Viewing Angle (@ Contrast Ratio >= 10)
R/L:170 degrees (typ)
U/D: 160 degrees (typ)
Analog interface with Scaling supported
Yes
With 15-pin D-sub
connector
HDMI interface with Scaling supported
No
Max resolution mode supported
1920 (H) x 1080(V)@60Hz
Number of Display Colors supported
16.7 Millions
Contrast Ratio
LGD:
1000:1 (typ.), 700:1(min)
AUO:
1000:1 (typ.), 600:1(min)
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

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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

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3.2. Operational Specification
3.2.1 Power supply
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


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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

Note-1: The pin assignment of 15-pin D-sub connector is as below,
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

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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-

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Note-3: The pin assignment of 19-pin HDMI connector is as below,
Note：Pin 11 is used as Cable Detect.
3.2.3 Video performance
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