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CAUTION:
Before servicing this chassis, it is important that the service technician read the "Safety
Precautions" and "Product Safety Notices" in this service manual.
ATTENTION:
Avant d'effectuer l'entretien du châassis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die ,,Sicherheitshinweise" und ,,Hinweise
zur Produktsicherheit" in diesem Wartungshandbuch zu lesen.
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
Data
contained
within
this
Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d'entretien peuvent faire l'objet
de modifications en vue de perfectionner
le produit.
Die
in
diesem
Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
TFT LCD MONITOR
July 2002
No. 0533
CML190SXW
1.
Introduction ..................................................................................................................................2
2.
Electrical Requirements ...............................................................................................................3
3.
Vl-901 Display Control Board ...................................................................................................18
4.
VK901 Control Panel Board ......................................................................................................23
5.
Inverter Board.............................................................................................................................24
6.
DC/DC Power and Audio Ckt Vm-902 .....................................................................................26
7.
Troubleshooting..........................................................................................................................28
8.
Mechanical Requirements ..........................................................................................................33
9.
Power Line Transient Test (Iec 61000-4-4 Fast Transients/Burst) ............................................39
10. Power Line Surge Test (IEC 61000-4-5 Surge) .........................................................................42
11. Enviroment Requirement ...........................................................................................................43
12. Regulation Compliance ..............................................................................................................44
13. Quality and Reliability ...............................................................................................................46
Appendix A: PCBA Assembly................................................................................................... 47
Appendix B: DISPLAY UNIT ASSEMBLY............................................................................. 55
Parts Lists.................................................................................................................................... 60
CML190SXWB


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2
1. INTRODUCTION
1.1 Scope
This specification defines the requirements for the 19" MICRO-PROCESSOR based Multi-
mode supported high resolution color LCD monitor, This monitor can be directly connected
to general 15 pin D-sub VGA connector and DVI-D digital connector, eliminates the
requirement of optional special display card. It also supports VESA DPMS power
management and plug & play function. There is a build-in stereo audio amplifier with
volume control to drive a pair of speakers.
1.2 Description
The LCD monitor is designed with the latest LCD technology to provide a performance
oriented product with no radiation. This will alleviate the growing health concerns. It is also
a space saving design, allowing more desktop space, and comparing to the traditional CRT
monitor, it consumes less power and gets less weight in addition MTBF target is 20k
hours or more.


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3
2. ELECTRICAL REQUIREMENTS
2.1 Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light:
225 lux
Viewing distance :
50 cm in front of LCD panel
Warrn up time
All specifications:
30 minutes
Fully functional:
5 seconds
Measuring Equipment:
Chroma 2250 signal generator or equivalent, directly
Connected to the monitor under test.
Minolta CA100 photometer, or equivalent
Control settings
User brightness control:
Maximum (unless otherwise specified )
User contrast control:
Typical
(unless otherwise specified )
User red/white balance,
Green/white balance and
Blue/white balance control:
In the center (unless otherwise specified )
Power input :
110Vac or 230Vac
Ambient temperature :
20
± 5 °C ( 68 ± 9 ° F)
Analog input mode :
1280 x1024 /60 Hz
2.1.1 MEASUREMENT SYSTEMS
The units of measure stated in this document are listed below:
1 gamma = 1 nano tesla
1 tesla = 10,000 gauss
cm = in x 2.54
lb = kg x 2.2
degrees F = [°C x 1.8] + 32
degrees C = [°F - 32]/1.8
u' = 4x/(-2x + 12y + 3)
v' = 9y/(-2x + 12y + 3)
x = (27u'/4)/[(9u'/2) - 12v' + 9]
y = (3v')/[(9u'/2) - 12v' + 9]
nits = cd/(m2) = Ft-L x 3.426
lux = foot-candle x 10.76
2.2 LCD monitor General specification
Panel Type :
19 " active matrix color TFT LCD
1). FUJITSU FLC48SXC8V
Display size :
376.32mm(H) x 301.056mm(V)
Display mode :
VGA
720 X 400 (70 Hz)
VGA
640 X 480 (60/66/70/72/75 Hz)
SVGA
800 X 600 (60/70/72/75 Hz)


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4
XGA
1024 X 768 (60/70/75 Hz)
SXGA 1280 X 1024 (60/70/75 Hz)
standard resolution
Pixel pitch :
0.098x3mm(H) x 0.294mm(V)
Display Dot :
1280 x (RGB) x 1024
Pixel Clock :
25.2 ­ 135.0MHz
Contrast ratio:
= 0°
500 : 1
(typical)
Brightness:
250
cd/m
2 (typical)
Response time (Tr/Tf) :
15 /10 msec
Display color :
16777216 (8 bite color)
Viewing angle:
L / R
85
/
85
(
170 degrees horizontal typical)
U / D
85
/
85
(
170 degrees vertical typical)
Luminance Uniformity :
> 70 %
Pc interface: 1). Video :
RGB analog 0.7V peak to peak
Sync :
TTL positive or negative
2). Digital TMDS
Signal connector :
15 pin Mini D type, (standard VGA video)
DVI-D connector
Front control :
power on/off with LED select (up, down) adjustment (+,-)
Interface frequency
Horizontal Frequency 24KHz --80KHz(analog), 31.5­ 80KHz(digital)
Vertical Frequency
56Hz ----75Hz
Plug & play :
Support VESA DDC2B functions
Power Input voltage :
Single phase, 50/60HZ, 100VAC to 240VAC
±10%
Total output power :
60 Watt max.
2.3 LCD Panel Specification
2.3.1 LCD Panel Model
(FUJITSU FLC48SXC8V)
· Display Type
active matrix color TFT LCD
· Resolution
1280 x 1024 pixels
· Display Dot
1280 x (RGB) x 1024
· Display Area
376.32mm(H) x 301.056mm(V)
· Pixel Pitch
0.098x3mm(H) x 0.294mm(V)
· Display Color
16777216


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· Lamp Voltage
700 Vrms typ.
· Lamp Current
7mA rms.( typ). 4 Lamp
· Weight
3200g .
· Optical Specifications
The following items are measured under stable conditions. The optical characteristics
should be measured in a dark room or equivalent state with the methods shown in
Note(4).
Measuring equipment : TOPCON BM-5A, BM-7, PHOTO RESEARCH PR650
(Inverter Freq. : 54kHz) *Ta =25
± 2°C, VDD=5V, fv=60 Hz, fDCLK=54 MHz, IL= 6.5mArms
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
Note
Contrast Ratio
(Center of screen)
CR
T.B.D
500
-
(1)(2)(4)
BM-5A
Rising
TR
-
15
30
Response
Time
Falling
TF
-
10
25
msec
(1)(3)
BM-7
Luminance of White
(Center of screen)
YL
200
250
-
cd/m2
(5)
BM-5A
Rx
0.648
Red
Ry
0.346
Gx
0.292
Green
Gy
0.602
Bx
0.150
Blue
By
0.130
Wx
0.313
Color
Chromaticity
(CIE 1931)
White
Wy
Normal
= 0°
= 0°
Viewing
Angle
TYP.
-0.03
0.329
TYP.
+0.03
(1)(4)
PR650
L
85
-
-
Hor.
R
85
-
-
H
85
-
-
Viewing
Angle
Ver.
L
CR
10
85
-
-
Degrees
(1)(4)
BM-5A
Brightness Uniformity
(9 points)
BUNI
70
-
-
%
(6)
BM-5A
Note 1) Definition of Viewing Angle: Viewing angle range (10
CR)