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
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