Acer G185H User manual

Acer Acer –LCD-G185H&G195H
Service Manual
LCD Monitor Acer G185H&G195H

1
1
Table of Contents
Important Safety Notice .........................................................................................02
01 Product Specification ..........................................................................................03
02 Flat Panel Specification .......................................................................................15
03 Exploded Diagram ..............................................................................................36
04 Troubleshooting ....................................................................................................37
05 Spare Parts List ...................................................................................................42
06 Schematics and Layouts.......................................................................................43
07 Assembly and Disassembly ................................................................................46
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 G185H&G195H Service Manual

Acer Acer –LCD-G185H&G195H
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.

Acer Acer –LCD-G185H&G195H
01 Product Specification
1. General:
Acer G195HQ is designed with LVDS interface and dual (analog and digital signal) 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 1366x768 full screen display.
The image can be adjusted through OSD control.
1.1 Main Features
Features Specifications
Panel source MT185GW01-V0
Maximum resolution 1366x768 @ 60Hz
Back light system 2 CCFL
Actual Resolution display WXGA(1366x768)
Pixel pitch 0.3(H) x 0.3(V)
Display area 409.8 ( H ) x230.4 ( V ) , 18.5” diagonal
Contrast ratio 50000:1(ACM ON)
Response time (Tr+Tf) 5ms (typ.),
Viewing angle H.160, V.160 typ. (CR>=10)
Input interface Analog(D-sub 15 pin)
Digita(DVI-D connector )----option
Audio system 1 W + 1 W
Power management Compatible with VESA,EPA,NUTEK,DPMS
Plug & Play VESA
University AC power supply YES
For Non-EMEA English, Deutsch, Español, 简体中文, 繁體中文, Français, Italiano, 日本語
OSD language For EMEA English, Deutsch, Español, Dutch, Russian, Français, Italiano, Finnish
1.2 Accessories
Items VGA cable DVI
cable
Audio cable
User’s
manual Warranty card Quick-start Guide
Description 1.8m 1.8m 1.8m Multi Multi Multi
●●●●●●
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.

Acer Acer –LCD-G185H&G195H
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)
2.2 Safety, EMC, Ergonomics and Compatibility Requirements
EMC
Safety
EMC&Safety
Ergonomics
2.3 Electrostatic Discharge Requirements
Item Condition Spec
Contact discharge : +4KV
Contact discharge : +8KV ●
Air discharge : +8KV
Electrostatic Discharge IEC61000-4-2(EN55024)
Air discharge : +15KV ●
2.4 Reliability
Items Condition Spec Note
MTBF Operating condition is 40°C≧60,000 Hours Excluding the
LCD, CCFL
CCFL Life time Luminance becomes 50% ≧50,000 Hours(min) Note1
Note1. Life time (Hr) is defined as the time when brightness of a lamp unit itself becomes 50%.
3. Electrical and Optical Characteristics and Performance
3.1 Main Power Supply
Items Condition Spec Note
AC Input Voltage Range Universal input full range 100~240VAC /50~60Hz

Acer Acer –LCD-G185H&G195H
AC Input Current 100Vac
240Vac
1.2A(max)
0.6A(max)
AC Frequency Range 100Vac
240Vac
50Hz – 60Hz
Inrush Current 120Vac,cold star,0°C
240Vac,cold star,0°C
30A (max)
60A(max)
Regulator Efficiency DC output full loading ≥75%
+14.2V output <1000mv
+5.2Vcc output <200mv
Ripple and Noise
+5.2V audio output <200mv
Note4
DC Output Voltage and Current VCC14.2V(13.5~16.3V);
VCC5.2V(4.95~5.45V);
Audio VCC5.2V(4.95~5.45V)
0.8A(typ.),1.0A(max)
0.8A(typ.),1.0A(max)
0.5A(typ.),0.6A(max)
Power consumption with Audio ≤28W
Protection See Table-1
Power management See Table-2
Note2.Before each test, the buck capacitor need to be discharged.
Beforeeachtest,itmust be 10 minutes at least after the latest test.
Note4. ested by DC loading side parallel with a 47uF/EC and 0.1uF/Ceramic , Capacitors and measured band-width with
DC-20MHz, the sine wave signal that the frequency is 1K Hz input when testing the ripple for the
5V of audio.
Table-1
Protection Condition Spec
OPP(Over power protection) nominal AC input 35W ( min )
Table-2
Status H-sy
nc V-sy nc Video Power LED
Power On on on active ≤28W Blue
off on blanked < 1W Amber
on off blanked < 1W Amber
Power Saving
off off blanked < 1W Amber
Power Off -- -- -- < 0.5W Off
3.2 Backlight Power Supply
Panel: INL: MT185GW01 V.0
Items Specification
Lamp 2 CCFL
Input Voltage 13.5V~ 16.3 V
Input current 0.8A (Typ.), 1.0A (Max.)
On/Off switch level 5.5V≧Von≧2.0 V (on)
-0.3v ≤Voff ≤0.8 V (off)
Brightness PWM duty Extra PWM duty:18%~100%(DCR);29%~100%(CR);
PWM:High=3.3V(3.0~3.30V),Low=0.0V
CCFL operating Voltage 700Vrms (Typ.),
DCR:1.6 mA (min.); CR:3.0 mA (min)
CCFL Current
7.5mA (Typ.)

Acer Acer –LCD-G185H&G195H
8.0mA (Max.)
CCFL startup voltage ≧1650 Vrms (0˚C)
Operating frequency 40~80 KHz
Protect delay time > 1 second
Lamp 2 CCFL
Remark: If phase in other second panel, Panel general specifications pls refer to the panel spec
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 : 1366 x 768
Video input level : 700 mV ± 2%
Warm-up time : 30 minutes
LCD Module BL
INL: MT185GW01 V.0 ≥250 cd/m2
Set brightness control and also contrast control at maximum, to measure the screen center, the light output shall ≥BL cd/m2
(as panel spec).If phase in other second panel, pls refer to the panel spec.
3.4 White balance
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
The test standard conditions refer to Sec 3.3. (Brightness and contrast are under default value)
3.5 Brightness uniformity
The test standard conditions refer to Sec 3.3.
%75
)(backlightpointsnineofluminanceMax.
)(backlightpointsnineofluminanceMin.
4. Input / Output Signal Specifications
≧

Acer Acer –LCD-G185H&G195H
4.1 Video signals
Items Condition Specification
Analog RGB signal Input impedance = 75 Ohm 0.7Vp-p
Sync Input impedance ≧1k Ohm TTL level, Separate H/V-sync(+/-)
4.2 Signal Timing
Through D-SUB/DVI connectors, this unit can support FH= 30~80 KHz, Fv=55~75Hz, Modes details as below:
Mode Resolution
(active dot) Resolution (total dot) Horizontal Frequency (KHz) Vertical Frequency (Hz) Nominal Pixel Clock (MHz)
EDID
640x480@60Hz 800 x 525 31.469 59.941 25.175 23H
640x480@72Hz 832 x 520 37.861 72.809 31.500 23H
640x480@75Hz 840 x 500 37.500 75.000 31.500 23H
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
800x600@72Hz 1040 x 666 48.077 72.188 50.000 24H
SVGA
800x600@75Hz 1056x625 46.875 75.000 49.500 24H
MAC 832x624@74.55Hz 1152x667 49.722 74.55 57.28 24H
1024x768@60Hz 1344x806 48.363 60.004 65.000 24H
1024x768@70Hz 1328x806 56.476 70.069 75.000 24H
XGA
1024x768@75Hz 1312x800 60.023 75.029 78.750 24H
MAC 1152x870@75Hz 1456x915 68.681 75.062 100.000 25H
1152x864@75Hz 1600x900 67.5 75 108 2E~2FH
VESA 1280x960@60Hz 1800x1000 60 60 108 2C~2DH
1280x1024@60Hz 1688x1066 63.981 60.020 108.000 2A~2BH
SXGA 1280x1024@75Hz 1688x1066 79.976 75.025 135.000 24H
VESA 1280x720@60Hz 1650x750 44.955 59.940 74.176 26~27H
1280x800@60Hz 1680x831 49.702 59.810 83.500 28~29H
WXGA 1366x768@60Hz 1792x798 47.712 59.790 85.500 36~46H
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
4.2.1 Digital signals
TMDS Signal: (min) ±200mVpp@24Bit
4.3 Timing requirements
Scan Frequency Condition Specification
Horizontal Sync polarity: (+) or (-) 30 ~ 80 KHz.
Vertical Sync polarity: (+) or (-) 55-75Hz
Out of range
Excluding
Horizontal 30~80 KHz or
Vertical 55-75 Hz
Message “Input Not Supported” on screen
4.4DDC data
4.4.1 EDID Standard Compliance
EDID File Format: VESA’s EDID Standard Version1.0, Revision 12,
EDID Structure : Version #1, Revision #3.
EDID Data Table : See the attached table (for example)
G195HQ VGA EDID table

Acer Acer –LCD-G185H&G195H
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 1D 01 00 00 00 00
1 24 13 01 03 08 29 17 78 EA 3D 85 A6 56 4A 9A 24
2 12 50 54 BF EF 90 81 C0 81 00 81 80 81 40 71 4F
3 01 01 01 01 01 01 66 21 56 AA 51 00 1E 30 46 8F
4 33 00 9A E6 10 00 00 1C 00 00 00 FF 00 30 30 30
5 30 30 30 30 30 30 30 30 30 0A 00 00 00 FD 00 37
6 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC
7 00 47 31 39 35 48 51 0A 20 20 20 20 20 20 00 5C
G195HQ 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 1D 01 00 00 00 00
1 24 13 01 03 80 29 17 78 EA 3D 85 A6 56 4A 9A 24
2 12 50 54 BF EF 90 81 C0 81 00 81 80 81 40 71 4F
3 01 01 01 01 01 01 66 21 56 AA 51 00 1E 30 46 8F
4 33 00 9A E6 10 00 00 1C 00 00 00 FF 00 30 30 30
5 30 30 30 30 30 30 30 30 30 0A 00 00 00 FD 00 37
6 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC
7 00 47 31 39 35 48 51 0A 20 20 20 20 20 20 00 E4
G185H 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 1C 01 00 00 00 00
1 24 13 01 03 08 29 17 78 EA 3D 85 A6 56 4A 9A 24
2 12 50 54 BF EF 90 81 C0 81 00 81 80 81 40 71 4F
3 01 01 01 01 01 01 66 21 56 AA 51 00 1E 30 46 8F
4 33 00 9A E6 10 00 00 1C 00 00 00 FF 00 30 30 30
5 30 30 30 30 30 30 30 30 30 0A 00 00 00 FD 00 37
6 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC
7 00 47 31 38 35 48 0A 20 20 20 20 20 20 20 00 8F
G185H 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 1C 01 00 00 00 00
1 24 13 01 03 80 29 17 78 EA 3D 85 A6 56 4A 9A 24
2 12 50 54 BF EF 90 81 C0 81 00 81 80 81 40 71 4F
3 01 01 01 01 01 01 66 21 56 AA 51 00 1E 30 46 8F
4 33 00 9A E6 10 00 00 1C 00 00 00 FF 00 30 30 30
5 30 30 30 30 30 30 30 30 30 0A 00 00 00 FD 00 37
6 4B 1E 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC

Acer Acer –LCD-G185H&G195H
7 00 47 31 38 35 48 0A 20 20 20 20 20 20 20 00 17
4.5 Audio signal
Specification
Items Min TYP MAX TEST CONDITIONS
Frequency response range(Hz) 200 --- 20k
Signal to noise ratio(dB) 40 --- ---
Output power(W) 0.8 1.0 1.2
THD+N --- ---
10%
AT 1KHz 1Vrms
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
Supplier INL
Model name MT185GW01 V.0
Display Area 409.8 ( H ) x230.4 ( V ) , 18.5” diagonal
Pixel Pitch 0.3(H) x 0.3(V)
Display Colors: 16.7 Million (RGB 6-bit + HiFRC)
Number of Pixel 1366x768 pixels
Pixel Arrangement RGB vertical stripe
Brightness 300cd/m2(Typ.) 250cd/m2(Min.)
Contrast Ratio 1000:1 Typical
Viewing Angle H.160, V.160 typ. (CR>=10)
Display Mode Normally White
Frame rate 60Hz
Response Time Tr + Tf = 5ms Typical
Surface Treatment Anti-glare, Haze = 25%,
Hard coating (3H)
Lamp 2 CCFL
Outline Dimension 430.37(W)x254.6(H)x16.5(D) Typ
Remark: If phase in other second panel, Panel general specifications pls refer to the panel spec
5.1.2 LCD module defects
LCD module defects check follow to the IIS.
5.2Keypad Function
5.2.1 Control buttons on the front bezel
CONTROL KEY KEYS FUNCTION