Acer S191HQL User manual
A
CER_LCD_S191HQL
_S
M
20120602V0
Contents
Table of Contents
Important Safety Notice .............................................................................................................................. 1
1. Product Specification.............................................................................................................................. 2
2. OSD Menu ............................................................................................................................................ 17
3. Exploded Diagram ................................................................................................................................ 22
4. Assembly and Disassembly Procedures .............................................................................................. 25
5. Troubleshooting .................................................................................................................................... 30
6. Firmware Upgrade Process.................................................................................................................. 34
7. Writing EDID Process ........................................................................................................................... 40
8. FRU (Field Replaceable Unit) List ........................................................................................................ 46
9. Schematics and Layouts ...................................................................................................................... 49
Safety Notice
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.
1
Important Safety Notice
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 explosed 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.
2
1. Product Specification
1.1 Scope:
LCD BM185WH2-T2BB
LM185WH2-T2BB is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode (LED)
backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type
display operating in the normally white mode. It has a 18.5 inch diagonally measured active display area with HD
resolution (768 vertical by 1366 horizontal pixel array) Each pixel is divided into Red, Green and Blue sub-pixels or
dots which are arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is determined with
a 8-bit gray scale signal for each dot, thus, presenting a palette of more than 16,7M colors with
Advanced-FRC(Frame Rate Control). It has been designed to apply the interface method that enables low power,
high speed, low EMI. FPD Link or compatible must be used as a LVDS(Low Voltage Differential Signaling) chip. It is
intended to support applications where thin thickness, wide viewing angle, low power are critical factors and graphic
displays are important. In combination with the vertical arrangement of the sub-pixels, the LM185WH2-T2BB
characteristics provide an excellent flat panel display for office automation products such as monitors
3
Optical Characteristics:
Optical Characteristics(For LCD BM185WH2-T2BB)
ParameterSymbol
Values
UnitsNotes
MinTypMax
ContrastRatioCR400600‐
1
(PR‐880)
SurfaceLuminance,whiteLWH160200‐ cd/m22
(PR‐880)
LuminanceVariationWHITE9P75‐ ‐ %3
(PR‐880)
ResponseTime
RiseTimeTrR‐1.12.6ms4
(RD80S)
DecayTimeTrD‐3.97.4ms
ColorCoordinates
[CIE1931]
RED
Rx
Typ
‐0.03
0.627
Typ
+0.03(PR‐650)
Ry0.347
GREEN
Gx0.339
Gy0.621
BLUE
Bx0.154
By0.050
WHITE
Wx0.313
Wy0.329
ViewingAngle(CR>5)
5
(PR‐880)
xaxis,right(=0°)r 4550Degree
xaxis,left(=180°)l 4550
yaxis,up(=90°)u2025
yaxis,down
(=270°)d4045
ViewingAngle(CR>10)
xaxis,right(=0°)r 4045Degree
xaxis,left(=180°)l 4045
yaxis,up(=90°)u1015
yaxis,down(=270°)d3035
Crosstalk
1.5%6
(PR880)
4
1.2 General Requirements:
1.2.1 Test Condition:
All tests shall be performed under the following conditions, unless otherwise specified.
Warm up time > 30 min.
AC supply voltage 230V± 5%, 50± 3 Hz
Ambient temperature 20C 5C
Humidity 65%20%
Display mode 1440x900,60Hz,PixelClock：106.5MHZ,allwhite
e-color mode Set to “User” mode
Contrast control Set to The value under user mode, which allows that the
brightest two of 32 linear distributed gray-scales (0～700mv)
can be distinguished.
Color temperature 6500°K
Brightness control The value under user mode
Analog Input signal 700 mVss
Picture position and size Factory preset value,
Viewing angle 90 ° H and V
Viewing distance 40 cm for LCD performance, 20 cm for LCD failures
Ambient illumination Dark room (< 1 cd/m2)
5
1.2 General Requirements:
1.2.1 Test Condition:
All tests shall be performed under the following conditions, unless otherwise specified.
Warm up time > 30 min.
AC supply voltage 230V± 5%, 50± 3 Hz
Ambient temperature 20C 5C
Humidity 65%20%
Display mode 1366 x 768, 60 Hz, all white
e-color mode Set to “User” mode
Contrast control Set to The value under user mode, which allows that the
brightest two of 32 linear distributed gray-scales (0～700mv)
can be distinguished.
Color temperature 6500°K
Brightness control The value under user mode
Analog Input signal 700 mVss
Picture position and size Factory preset value,
Viewing angle 90 ° H and V
Viewing distance 40 cm for LCD performance, 20 cm for LCD failures
Ambient illumination Dark room (< 1 cd/m2)
1.2.2 Test Equipment: CHROMA 6630.
1.3 Electrical:
This section describes the electrical requirement of the monitor. Below is the block diagram.
Led drive
19V
AC-IN
100V-240V
Flat Panel and
LED backlight
Main Board
Video signal, DDC
HOST Computer
Key Board
Adapter
6
The LCD monitor will contain a main board and a key board which house the flat panel control logic,
brightness control logic and DDC. The adapter will provide AC to DC voltage to drive the main board chips
each voltage. The function key board is used for OSD control, monitor power ON/OFF and the LED indicator
for power status.
LCD Panel
Driving system TFT Color LCD
Pixel pitch 0.10*RGB(H)mm x 0.30(V)mm
Contrast Ratio 920 g (Typ.)
Response time 5ms (Typ.). 10ms(max)
Luminance of White 200 cd/m2 ( Center 1Point, typ)
Input
Separate Sync. H/V TTL
H-Frequency 30kHz-60kHz
V-Frequency 40-75Hz
Viewing angle CR>10 , R/L 90(Typ.), U/D 50(Typ.)
Display mode 1366 x 768@60Hz
EPA ENERGY STAR®
ON Mode < 30W
OFF Mode < 2W
Power Source 100 V ~ 240 V, 50 3Hz, 60 3Hz
Environmental
Considerations
Operating Temp: 0° to 40°C
Storage Temp: -20° to 60°C
Operating Humidity: 15% to 90%
Storage Humidity: 15% to 90%
Operating Altitude: 12,000 feet
Storage Altitude: 40,000 feet
Power line surge No advance effects (no loss of information or defect) with a maximum of 1 half-wave
missing per second
7
1.3.1 Interface Connectors:
1.3.1.1 Power Adaptor and Connector:
The AC inlet connector shall be an IEC 320-C13 male power receptacle for connection to mains power. The
power cord shall be gray or black with length of 1.8m + 10cm/-0cm. The power cord type is different from
regions.The adapter output cable length of 150036mm,voltage is 19v and current is 1.58A.
1.3.1.2 Analog Connector and Cable: The analog signal cable shall be Gray or black and 1.8m + 10cm/-0cm.
A. D
-
SUB
B. LED backlight Connector
Connector
:
CN803
C. Key Board Connector
Connector
:
CN401
Pin Signal Pin Signal
1 Feedback1 6 LED drive
2 Feedback2 7 NC
3 NC 8 NC
4 NC 9 NC
5 LED drive 10 Feedback3
Pin Signal Pin Signal
1 GND 4 POWER KEY
2 LEDA 5 KEY2
3 LEDG 6 KEY1
8
D. Flat Panel Connector
Connector
:
CN409
Pin Signal Pin Signal
1 GND 26 POL
2 GND 27 CSC
3 GND 28 H2DOT
4 GND 29 GND
5 GND 30 ICLK_RESET
6 GND 31 ICLK1
7 GND 32 ICLK2
8 GND 33 ICLK3
9 GND 34 ICLK4
10 GND 35 IVDD-O
11 GND 36 IVDD-E
12 LVCLK- 37 FLK2
13 LVCLK+ 38 FLK1
14 GND 39 GND
15 LV2- 40 SDA
16 LV2+ 41 SCL
17 GND 42 GND
18 LV1- 43 VIN
19 LV1+ 44 VIN
20 GND 45 VIN
21 LV0- 46 VIN
22 LV0+ 47 VIN
23 GND 48 VIN
24 SOE 49 GND
25 POL2 50 GND
9
1.3.2 Input Signals:
Video Input Signals Range (Analog RGB Signal)
No.
S
y
mbo
l
Item
M
i
n
Ma
x
Uni
t
1
Fh
Ho
rizontal
F
r
equen
cy
38.3 62.0
k
Hz
2
F
v
Ver t ic al
F
r
e
q
uen
c
y
48 76 Hz
3
F
c
l
k
Pi
x
el Clock
F
r
e
q
uen
c
y
61.6
90.0 MHz
4
V
i
h
Hi
g
h
Le
v
el I
n
p
u
t5.5
V
5
V
il Low
Le
vel
Inpu
t
4.5
V
6
V
i
deo
RGB
Ana
l
o
g
V
i
deo
Le
v
e
l
0
0.3 V
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 700mV is the maximum
signal amplitude for the respective color. The video signal is terminated with 75 ohms.
1.3.2.2 Video Signal Termination Impedance:
The analog video signal termination shall be 75 ohm.
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:
Level: L = 0V ~ 0.8V H = 2.4V ~ 5V
1.3.2.5 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.
1.3.2.6 Digital TMDS Input (DVI signal input):
1.3.3 User Controls and Indicators:
Signalsusedformodedetection:
-Nominal horizontal frequency
-Nominal vertical frequency
-Horizontal sync. Pulse polarity
-Vertical sync. Pulse polarity
The tolerance for detecting the horizontal frequency is between ±1KHz from center frequency
The tolerance for detecting the vertical frequency is between ±0.5Hz from center frequency
1.3.3.1 Power On/Off Switch:
The monitor shall have a power control switch visible and accessible on the front of monitor.
1.3.3.2 Power Indicator LED:
10
The monitor shall have LED indicators located on the front of the monitor. Table 1 is the LED color for the
power indicator.
1.3.3.3 On-Screen Display:
On Screen Display system shall be used to control the monitor. Current setting will be saved and OSD will be
tuned off when the keys are not touched for a period of time.
A) Key Function Overview:
All functions are controlled by OSD buttons on the front of bezel.
1. Power Switch To turn ON or OFF the power.
2.Power LED Lights up to indicate the power is turned ON.
3.Empowering Trigger the acer eColor Management.
4.Auto Adjust button / Exit 1)When OSD menu is in active status, this button will act as
EXIT-KEY (EXIT OSD menu).
2)When OSD menu is in off status, press this button for 2
seconds to activate the Auto Adjustment function .The Auto
Adjustment function is used to set the Hpos, Vpos, Clock and
Focus.
3) When exit eColor OSD, it will activate the Auto Adjustment
function automatically.
5.< / > Press < or > to select the desired function. Press < or > to
change the settings of the current function. Or press < to trigger
volume management OSD, press > to change input source.
6.MENU / ENTER Activate OSD menu when OSD is OFF or activate/de-activate
adjustment function when OSD is ON. But it has no function at
the information page.
11
B) Menu Operation:
Pressing the MENU button brings up the first level menu.
C) OSD Function:
Acer e-Color Management
Contrast, Brightness, ACM
H-position, V-position
Clock, Focus
OSD position, Timeout
Color Select and adjust (warm, cool, user).
EMEA:11 Language selected
(English, Deutsch, French, Spanish, Italian, Hollands, Finnish, Turkish, Polish, Pусский,
Portuguese )
ASIA: 8 Language selected
(English, DutSch, French, Spanish, Italian, Japanese, Chinese, Chinese Simplify, )
Signal Input Select and DDC/CI Control （Analog, DDC/CI）
Display Information
Factory Reset
Exit
D) OSD Control Factory Default Values:
eColor mode Standard
Brightness 100
Contrast 50
ACM Off
Color Warm
Language English
OSD Timeout 10s
DDC/CI On
User R/G/B 50/50/50
1.3.4 Monitor Modes and Timing Capability:
1.3.4.1 Format and Timing:
The monitor shall synchronize with any vertical frequency from 56 to 75 Hz, and with any horizontal frequency
from 31 to 80 KHz.
12
1.3.4.2 Factory Assigned Display Modes:
ModeResolution
VGA
640x48060Hz
640x48072Hz
640x48075Hz
SVGA
800x60056Hz
800x60060Hz
800x60072Hz
800x60075Hz
XGA
1024x76860Hz
1024x76870Hz
1024x76875Hz
VESA1152x86475Hz
1280x96060Hz
1280x72060Hz
WXGA 1366x768 60Hz
1280x80060Hz
DOS720x40070Hz
SXVGA1280x102460Hz
1280x102475Hz
VGA640x48067Hz
SVGA832x62475Hz
MAC1152x87075Hz
1.4 Flat Panel:
1.4.1 General Requirements:
The panel shall be a FULL HD resolution 18.5” diagonal TFT-LCD.
1.4.2 Polarizer Hardness:
The front polarizer should have hard coating (3H) and anti-glare treatment.
1.4.3 Backlight Requirements:
1.4.3.1 General Requirements: (For LCD BM185WH2-T2BB)
Parameter Symbol Condition
Values
Unit Notes
Min. Typ. Max.
LED : 1,7
LED String Current Is - 110 120 mA 2,7
LED String Voltage Vs 45.0 48.0 51.0 V 3,7
Power Consumption PBar - 10.6 11.2 Watt 4,6,7
LED Life Time LED_LT 30,000 - - Hrs 5,7
13
1.4.4 Defects:
1.4.4 Defects:
1.4.4.1 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.
Rubbing Line: Horizontal or diagonal lines that appear gray with the display patterns dark and may have
resulted from an “out of control” rubbing process on the polyimide or “waves” on the BEFs or prism sheets .
Newton Ring: The “rainbow” effect caused by non-uniform cell thickness.
Mottling: When the unit lights, variation / non - uniformity (splotch) appears light (white) with the display and
might vary in size.
Dim Line: When the unit lights, line(s) in the minor (vertical) or major (horizontal) axis appear dim, but not
completely on or off.
Cross Lines Off: When the unit lights , lines in both the minor and major axis do not appear.
Bright/Dark Dot: A sub - pixel (R, G, B dot) stuck off / on (electrical).
1.5 Optical Characteristics:
1.5.1 Brightness uniformity:
Definition of White Variation (δW):
Surface luminance is the luminance value at center 1 point(1) across the LCD surface 50cm from the surface
with all pixels displaying white.For more information see FIG 8
The variation in surface luminance , WHITE is defined as
Minimum(P1,P2…..P9)
WHITE = --------------------------------------------- *100
Maximum(P1,P2…..P9)
For more information see Figure 8.
14
1.5.2 Contrast ratio (CR):
1.5.2.1 General CR:
The values specified are at an approximate distance 50cm from the LCD surface at a viewing angle of and
equal to 0 °.
Contrast ratio(CR) is defined mathematically as :It is measured at center point(1)
Surfaceluminancewithallwhitepixels
Contrast ratio = ---------------------------------------------------------
Surfaceluminancewithallblackpixels
1.5.3 Response time:
15
Response time is the time required for the display to transition from black to white (Decay Time, TrD) and from
white to black (Rise Time, TrR)
The sampling rate is 2,500 sample/sec. For additional information see FIG. 9.
The response time is defined as the following figure and shall be measured by switching the input signal for
each gray to gray.
1.5.4 Viewing angles:
Viewing angle is the angle at which the contrast ratio is greater than 10 or 5. The angles are
determined for the horizontal or x axis and the vertical or y axis with respect to the z axis
which is normal to the LCD surface. For more information see FIG. 10 .
16
1.5.5 Chromaticity:
The x and y co-ordinates for Reddish, Bluish and User preset mode shall be as below:
Reddish Preset (6500K):
x=0.313 ± 0.020
y=0.329 ± 0.020
Bluish Preset (9300K):
x=0.283 ± 0.020
y=0.297 ± 0.020
1.6 Environmental Requirements:
Operating Storage
Temperature: 0°C - +40°C -20°C - +60°C
Humidity: 15% - 90% 15% - 90%
Altitude: 12,000 feet (3,658m) 40,000 feet (12,192m)
1.7 Mechanical and Packing:
Monitor Packed Monitor
Width: 442.2mm 478mm
Height: 334.1mm 337mm
Depth: 135mm 96mm
Weight: 1.893kg 2.8878 kg
Dimension (mm):
17
2. OSD Menu
2.1 Key Definition:
1. Power Switch To turn ON or OFF the power.
2.Power LED Lights up to indicate the power is turned ON.
3.Empowering Trigger the acer eColor Management.
4.Auto Adjust button / Exit 1) When OSD menu is in active status, this button will act as
EXIT-KEY (EXIT OSD menu).
2) When OSD menu is in off status, press this button for 2
seconds to activate the Auto Adjustment function. The Auto
Adjustment function is used to set the Hpos, Vpos, Clock and
Focus.
3) When exit eColor OSD, it will activate the Auto Adjustment
function automatically.
5.< / > Press < or > to select the desired function. Press < or > to
change the settings of the current function. Or press < to trigger
volume management OSD, press > to change input source.
6.MENU / ENTER Activate OSD menu when OSD is OFF or activate/de-activate
adjustment function when OSD is ON. But it has no function at
the information page.
2.2 Function Menu:
1). Display Function Menu while user press any function button.
2). Layout as following figure:
2.3 Main OSD Menu:
2.3.1. OSD layout:
a. Display OSD menu when user press “MENU” button on front bezel.
b. Layout as following figure.
18
c. OSD layout for each function page.
Picture OSD
d. Item page status
Status
Display type
Non-Focus
Item focused
Item selected
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