Acer X34GS User manual

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ACER_X34GS
LIFECYCLE EXTENSION
GUIDE

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Contents
Table of Contents
Important Safety Notice------------------------------------------------------------------------------------- 03
01. Product Specification---------------------------------------------------------------------------------- 04
02. OSD Menu------------------------------------------------------------------------------------------------ 36
03. Exploded Di a gram -------------------------------------------------------------------------------------- 46
04. Wiring connectivity diagram--------------------------------------------------------------------------- 47
05. Mechanical Instruction---------------------------------------------------------------------------------- 47
06. Assembly and Disassembly Procedures----------------------------------------------------------- 48
07.
Trouble shooting--------------------------------------------------------------------------------------- 55
08. Firmware Upgrade Procedure ------------------------------------------------------------------------ 58
09. Writing EDID Procedure------------------------------------------------------------------------------- 61
10. SN Writing Process ----------------------------------------------------------------------------------- 64
11. FRU (Field Replaceable Unit) List-------------------------------------------------------------------- 66
12. Timing table ----------------------------------------------------------------------------------------------- 69

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3
Safety No t ice
Any person attempting to service this chassis must familiarize with the chassis and be
aware of the necessary safety precautions to be used when serving electronic equipment containing
high voltage
Important Safety No ti ce ACER S190HQL 1
Product Announcement:
This product is certificated to meet RoHS Directive and Lead-Free produced definition. Using approved
critical components only is recommended when the situation to replace defective parts. Vender assumes
no liability express or implied, arising out of any unauthorized modification of design or replacing non-
RoHS parts. Service providers assume all liability.
Qualified Repairability:
Proper service and repair is important to the safe, reliable operation of all series products. The service
providers recommended by vender should being aware of notices listed in this service manual in order
to minimize the risk of personal injury when perform service procedures. Furthermore, the possible
existed improper repairing method may damage equipment or products. It is recommended that service
engineers should have repairing knowledge, experience, as well as appropriate product training per
new model before performing the service procedures.
NOTICE:
! To avoid electrical shocks, the products should be connect to an authorized power cord, and turn off
the master power switch each time before removing the AC power cord.
! To prevent the product away from water or exposed in extremely high humility environment.
! To ensure the continued reliability of this product, use only original manufacturer’s specified parts.
! To ensure following safety repairing behavior, put the replaced part on the components side of PWBA,
not solder side.
! To ensure using a proper screwdriver, follow the torque and force listed in assembly and
disassembly procedures to screw and unscrew screws.
! Using Lead-Free solder to well mounted the parts.
! The fusion point of Lead-Free solder requested in the degree of 220°C.

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2 ACER S190HQL
1. Product Specification
1.1 Scope:
This document defines the design and performance requirements for the 34”wide flat panel monitor. The display
element shall be a 34”inch diagonal, WQHD (3440x1440) resolution TFT-LCD display (Thin Film Transistor Liquid
Crystal Display) and support Video input signals are two HDMI, two DP with non- interlaced signal. Power saving
function complies with the VESA DPMS (Display Power Management Standard). And support 1ms VRB.
General display parameters:
•Lehui 34” panel: LM340UW6-SSA3

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1.2 General Requirements:
1.2.1 Test Condition:
Normal test condition is that brightness level set at Max. and contrast level set default. Test pattern is full
white pattern. The warm up time is more than 30 minutes. Ambient light should be less than 1 Lux.
1.2.2 Test Equipment:
The reference signal source is a calibrated Chroma 2326 or Quantum 801GD video generator. The use of
compatible generators during qualification and production is acceptable. Luminance meter is Minolta CA210,
TOPCON BM7 or compatible equipment.

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ACER S190HQL 3
1.3 Electrical:
This section describes the electrical requirement of the pure A+H+DP monitor. Below is the pure X34GS
monitor’s block diagram.
X34GS bmiippruzx

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This LCD monitor includes an interface board, power board and a function key board. The interface board
controls the TFT panel control logic, brightness control logic, and DC-DC conversion to supply the appropriate
power to the whole board and LCD panel then transmitting LVDS signals into LCD Module to drive the LCD
display circuit. The power board will provide the DC power to the interface board and LCD panel. The function key
board is used for OSD control, monitor power ON/OFF and the LED indicator for power status.
ITEM
SPEC
HDMI (Digital Video Interface)
F r equency Ranges
H: 31KHz~151KHz V: 48Hz~100Hz
Max Pixel c l ock
550MHz MHz
Input Impedance
100
Ω
HDMI
HDMI2.0
DP(Display Port)
F r equency Ranges
H: 271KHz - 271KHz V: 48Hz~180Hz
Max Pixel c l ock
960MHz
Input Impedance
100
Ω
DP
DP 1.4
Connectors
DC Jack
WAFER 2.5mm 4P 90' DIP
Input connecto r s
HDMI 19pinx2, DisplayPort 20-pin x 2 , Type-B 3.0 9-
pin x1, Type-C 12-pinx1, Type-A 18-pinx4
Power Consump
ti on
100~240 Vac, 50~60Hz
180W(max)
Power Sav i ng
< 0.5W
Power Off
< 0.3W
User’s Co n t r o l
Buttons
POWER, hotkey1,hotkey2,inputkey,menukey
Dimm i ng control range (max-min/max) x 100%
100%
Pre-Defined Timing
Preset T i ming
15
User’s Timing
16
Plug and P l ay
VESA DDCCI
Power Sav i ng
DPMS
DisplayColor
8bit+A-FRC
Response Time
OD Off :5ms/Nomal:3ms/Extreme:1ms
VRB Off :depending on OD
Setting/Normal:3ms/Extreme:1ms
1.3.1 Interface Connectors:
1.3.1.1 AC SOCKET
The AC inlet connector shall be an IEC/CEE-22 type male power receptacle for connection to mains
power. The power cord shall be black with length of 1.9±0.05 meters. The power cord type is different
from regions.
1.3.1.2 Analog Connector and Cable: The analog signal cable shall be black and 1800 mini-meters. The
analog VGA cable shall be a molded-over, shielded, triple row, 15 pins and blue color D type connector.

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A. Key Board connector
Pin
Signal
Description
1
KEY1
ADC1
2
KEY2
ADC2
3
PWR_KEY
Power On/Off Control
4
GND
Ground
5
LED_BlUE
LED control
6
LED_AMBER
LED control
7
NC
8
NC
B. Backlight connector
D．HDMI connector
Pin
Signal Assignment
Pin
Signal Assignment
1
TMDS Data2+
2
TMDS Data2 Shield
3
TMDS Data2-
4
TMDS Data1+
5
TMDS Data1 Shield
6
TMDS Data1-
7
TMDS Data0+
8
TMDS Data0 Shield
9
TMDS Data0-
10
TMDS Clock+
11
TMDS Clock Shield
12
TMDS Clock-
13
CEC
14
Reserved (N.C. on device)
15
SCL
16
SDA
17
EDID/CEC Ground
18
+5V Power

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19
Hot Plug Detect
E．DP connector
PIN
MNEMONIC
SIGNAL
1
ML_Lane 0 (p)
Lane 0 (positive)
2
GND
Ground
3
ML_Lane 0 (n)
Lane 0 (negative)
4
ML_Lane 1 (p)
Lane 1 (positive)
5
GND
Ground
6
ML_Lane 1 (n)
Lane 1 (negative)
7
ML_Lane 2 (p)
Lane 2 (positive)
8
GND
Ground
9
ML_Lane 2 (n)
Lane 2 (negative)
10
ML_Lane 3 (p)
Lane 3 (positive)
11
GND
Ground
12
ML_Lane 3 (n)
Lane 3 (negative)
13
CONFIG1
connected to Ground1)
14
CONFIG2
connected to Ground1)
15
AUX CH (p)
Auxiliary Channel (positive)
16
GND
Ground
17
AUX CH (n)
Auxiliary Channel (negative)
18
Hot Plug
Hot Plug Detect
19
Return
Return for Power
20
DP_PWR
Power for connector (3.3 V 500
mA)
Type-B 3.0 Connect

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Type-A 3.0 Connect
針腳編號
顏色
訊號
(Type A)
訊號
（Type B）
1
紅色
VBUS
2
白色
D−
3
綠色
D+
4
黑色
GND
5
藍色
StdA_SSRX−
StdB_SSTX−

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6
黃色
StdA_SSRX+
StdB_SSTX+
7
Shield
GND_DRAIN
8
紫色
StdA_SSTX−
StdB_SSRX−
9
橙色
StdA_SSTX+
StdB_SSRX+
Type-C Connector
Input signal connector of LVDS

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1.3.2.1 Video Signal Amplitudes:
The video inputs consist of Red, Green and Blue signals each has its own coaxial cable terminated at
the monitor. These video signals are analog levels, where 0V corresponds to black, and 735mV is the
maximum signal amplitude for the respective color. The video signal is terminated with 75 ohms.

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1.3.2.2 Video Signal Termination Impedance:
The analog video signal termination shall be 75 ohm +/- 2%.
1.3.2.3 Synchronization (Sync) Signals:
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 according to 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 according to the timing.
1.3.2.4 Sync Signal Levels:
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 were designed with 3.3 volt logic family, then the sync inputs must
be 5 volt tolerant.
1.3.2.5 Sync Signal Loading:
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.
1.3.2.6 Abnormal Signal Immunity:
The monitor shall not be damaged by improper sync timing, pulse duration, absence of sync,
abnormal input signal amplitude, or any other anomalous behavior of a graphics card.
1.3.2.7 Digital TMDS Input (HDMI signal input):
These video inputs consist of TX0+/- to TX2+/- and CLK+/- signals, each with its own shielded twisted
pair. These video signals are digital levels. Each signal pair is terminated by a normal 100 ohms.

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1.3.3 User Controls and Indicators:
1.3.3.1 Power On/Off Switch:
The monitor shall have a power control switch visible and accessible on the head of monitor.
1.3.3.2 Power Indicator LED:
The monitor shall have LED indicators located on the head of the monitor. Table 1 is the LED color for the
power indicator.
LED light
Status
Remark
Off
AC power Off/Key Off
power cord removed/Key Off
Blue
Power on / OSD working
Amber
standby/power saving
1.3.3.3 Key definition:
1.3.3.4 Key Function Overview:
All functions are controlled by OSD buttons on the head of the monitor.

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ACER S190HQL 7
1.3.4 Monitor Modes and Timing Capability:
1.3.4.1 Format and Timing:
The monitor shall synchronize with any vertical frequency from 48 Hz to 75Hz, and with any horizontal
frequency from 31 to 84 KHz for analog input (56 to 75 Hz, 31 to 84 KHz) and HDMI (48 to 75 Hz, 31 to
84 KHz). If the input frequency is beyond the specified range, the monitor shall display a warning screen
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:
There are 15 factory pre-set video modes. Pre-defined mode parameters will be recalled if the operating
mode is one of those pre-set modes. 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 horizontal scanning
frequency The screen parameters can be adjusted by the front bezel control buttons and then saved as a
user defined mode. The monitor shall include all the preset video timings shown in the following table.
1.3.5 Controller Requirements:
1.3.5.1 General Requirements:
The monitor shall include a controller which is capable of converting the analog RGB signal or HDMI
digital signal to the panel. The controller will include a PLL, A/D converters, TMDS receiver and other
circuitry necessary to perform its function. The PLL shall be stable enough to ensure a stable image.
1.3.5.2 Video Stretching:
The monitor shall have the function to “stretch” the video signal, so that an input signal from the
computer in any resolution smaller than 1920x1080 is automatically expanded to fill the entire
screen.
1.3.5.3 Panel Timing and Interface:
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

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ACER S190HQL 9
1.3.6 Power Adaptor Requirements:
The AC to DC power adaptor for this monitor shall be a DC power supply. This power adaptor shall have an
IEC receptacle for mains power input and provide sufficient power for backlight assembly , interface board and
panel. And it should meet all requirements specified in following Table.
AC TO DC Converter
Requirement
Input Voltag e Ra nge
The operating range shall be from 90 to 264 VAC sinusoidal for all models specified.
Input Frequency
Range
Input power frequency range shall be f rom 47 to 63Hz.
Power
Consumption
Power consumption for the monitor shall be less than 32W over the specified voltage and frequency
ranges. In Power off mode the power consumption will be less than 0.6W (at 11 0VAC).
Line
Fuse
The AC input shall be fused and become electrically open as a result on an unsafe current level. The
fuse may not user replaceable.
Initial
Cold Start
The power adaptor shall start and function properly when under full load, with worst case conditions
of in put voltage, input frequency, operating tem perature, and cold backlight LED .
Inrush Current
The inrush current must be limited to when operated at 120VAC, a nd when operated at . Inrush
current is measured at an ambient temperature of 25° C, with the unit temperature stabilized in the
power
off.
Hot
Start Cycle
The power adaptor shall not be damaged when power ON for one second and OFF for one second
for seven
consecu tive times after opera ting for one hour at full load, 25° C, and nom inal input line
voltage.
Under Voltage
The power adaptor 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 adaptor unit nor
cause failure of the inp ut.
Line Tran
sient
The power adaptor shall operate within EN 61000-4-4 (+/-1KV) and EN 61000-4-5(+/-2KV).
The power adaptor shall operate and comply with CE mark.
1.3.7 Display Communications Channel:
The monitor shall provide a display communications channel that conforms to VESA DDC2B hardware
requirements. This configuration shall contain the 128-byte(or 256-byte) EDID file as specified by VESA
E-EDID Standard. Once the EDID is programmed the write protection function will enabled. So the
EEPROM data cannot be overwritten
1.4 Flat Panel:
1.4.1 General Requirements:
The panel shall be an WQHD resolution 34” diagonal TFT-LCD
1.4.2 Panel Timings:
The controller in the monitor shall translate video timings from the PC to meet the timing requirements listed in
Panel specification. Under no circumstances may the controller supply the panel with timings that may result
in damage. The controller shall insulate the panel from the PC, so that the panel shall always be driven
according to its specification regardless of the timings being sent from the PC.
1.4.3 Polarizer Hardness:
The outer face of the front polarizer panel shall be covered with a coating with a 3H hardness value.
1.4.4 Backlight Requirements:
1.4.4.1 General Requirements:
The LED shall have a continuous operating life of at least 30000 hours at 25°C. The operating life is
defined as having ended when the illumination of light has reached 50% of the initial value. The LED
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).

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1.4.5 Defects:
1.4.5.1 Visual Inspection:
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 meet the SPEC.
1.4.5.2 Display Degradation:
Over the life of the product, variation of the parameters specified in Panel specification shall be
maintained within reasonable limits. The panel must not exhibit any significant defects while in
operation. This does not in any way change the warranty given by the panel manufacturer.
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 will follow the panel specification 300
to 700 lux.
1.4.5.4 Allowable Defects:
No cosmetic defects are allowed except those specified below. The conditions of visual inspections
are as follows:
- Viewing distance: 35~50cm.
- Ambient illumination: 300 to 700 lux.
- Viewing angle range shall be 90 degrees Horizontal and 65 degrees vertical typically.
- Defects not apparent within one minute shall be ignored.
1.4.5.5 Defect Terminology:
Dark Spots / Lines: Spots or lines that appear dark in the display patterns and are usually the result of
contamination. Defects do not vary in size or intensity (contrast) when contrast voltage is varied.
Contrast variation can be achieved through the use of varying gray shade patterns.
Bright Spots / Lines: Spots or lines that appears light in the display patterns. Defects do not vary in
size or intensity (contrast) when contrast voltage is varied. Contrast variation can be achieved
through the use of varying gray shade patterns.
Polarizer Scratch: When the unit lights, lines appear light (white) with display patterns dark and do
not vary in size. Physical damage to the polarizer does not damage the glass.
Polarizer Dent: When the unit lights, spots appear light (white) with display patterns dark and do not
vary in size. Physical damage to the polarizer does not damage the glass.
Bright/Dark Dot: A sub - pixel (R, G, B dot) stuck off / on (electrical).
1.4.5.6 LCD Inspection method:
All inspection should follow the IIS agreed between acer and Lehui/LGD.

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1.5 Optical Characteristics:
1.5.1 Brightness uniformity:
The uniformity is determined by using a photometer to measure the 9 points luminance in front of monitor
after at least 30 minutes warm up. It shall be test at 1920x1080/60Hz mode and full white square pattern with
contrast / brightness in default value. The values specified are at an approximate distance 50 cm from the
LCD surface and at 0 viewing angle.
The 9 test points are defined as below:
st
1.5.2 Contrast ratio (CR):
1.5.2.1 General CR:
The contrast ratio is determined by using a photometer to measure the maximum and minimum
luminance in front of monitor after at least 30 minutes warm up. It shall be test at
1366x768/60Hz mode and full white/full black square pattern with contrast/brightness in default
value. The values specified are at an approximate distance 50cm from the LCD surface and at 0
viewing angle. The contrast ratio is calculated as below:
Surface luminance with all white pixels
Contrast ratio (CR) = -----------------------------------------------------------------
Surface luminance with all black pixels
1.5.2.2 ACM (Auto Contrast Management):
The input image signal source may be various levels of illumination, and this ACM unit can analyze it
as histogram for the various levels of illumination, according to the analyzed result, when input a low-
luminance level image, display brightness will be adopted to corresponding low level, so that enhance
the contrast rate, this facilitates visual ergonomics enhancement.The monitor should me CR
>10000000:1 when ACM function is active.
1.5.3 Response time:

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The response time is defined as below:
1.5.4 Viewing angles:
1.5.5 Chromaticity:
The color chromaticity is measured by a photometer (CA-210) at 1920x1080/60Hz,Full White pattern;
Brightness /Contrast in default setting. The x and y co-ordinates for Reddish, Bluish and User preset mode
shall be as below.
Color Coordinate:
Mode
Color Coordinates
(CIE 1931, White x & White
y)
Percent of
Panel Max.
brightness
Brightness OSD value
Contrast OSD value
(Slope ratio for the
gamma)
80%
0.32±0.03, 0.35±0.03
80%
80
50 (1)