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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
June 2005
No. 0536
CML176SXW
CML178SXWB


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EP877/878 TFT LCD MONITOR CONTENTS
1. INTRODUCTION.......................................................................................................................... 4
1.1 Scope .................................................................................................................................................................... 4
1.2 Description ........................................................................................................................................................... 4
2. ELECTRICAL REQUIREMENTS ................................................................................................. 5
2.1 Standard Test Conditions........................................................................................................................................ 5
2.2 LCD monitor General specification ..................................................................................................................... 6
2.3 LCD Panel Specification ...................................................................................................................................... 7
2.4 Input Signals....................................................................................................................................................... 12
Supported Timing........................................................................................................................................................ 13
2.5 CONTROLS ........................................................................................................................................................ 15
2.6 White Color Temperature................................................................................................................................... 17
2.7 POWER SUPPLY ............................................................................................................................................... 18
2.8 Plug & Play(EDID) ............................................................................................................................................ 19
2.9 Audio Technical specification (EP877 Only) ..................................................................................................... 20
3. VL-750 DISPLAY CONTROL BOARD ....................................................................................... 21
3.1 Description ......................................................................................................................................................... 21
3.2 Features.............................................................................................................................................................. 21
3.3 BLOCK DIAGRAM ............................................................................................................................................ 21
System Block Diagram ................................................................................................................................................ 22
3.4 Connector Locations .......................................................................................................................................... 22
3.5 Connector Type .................................................................................................................................................. 24
3.6 Signal Pin & Description ................................................................................................................................... 24
4. VK-723 Control Panel Board .....................................................................................................25
4.1 Description ......................................................................................................................................................... 25
4.2 Connector and Switch Locations........................................................................................................................ 25
4.3 Connector type.................................................................................................................................................... 25
4.4 Connector pin Assignment.................................................................................................................................. 25
4.5 Switch definition ................................................................................................................................................. 25
4.6 LED definition .................................................................................................................................................... 25
5. POWER SUPPLY & INVERTER BOARD .................................................................................. 26
5.1 Description ......................................................................................................................................................... 26
5.2 Power supply ( AC to DC section)...................................................................................................................... 26
5.3 Inverter (DC to AC Section) ............................................................................................................................... 27
5.4 Electrical characteristics.................................................................................................................................... 27
5.5 Connector locations............................................................................................................................................ 28
6. TROUBLESHOOTING ............................................................................................................... 30
6.1 Main Procedure.................................................................................................................................................. 30
7. MECHANICAL REQUIREMENTS .............................................................................................. 34
7.1 Vibration and Shock ........................................................................................................................................... 34
7.2 Package Drop Specification ............................................................................................................................... 34
7.3 Dimension Size and Weight ................................................................................................................................ 35
7.4 Gap Spec............................................................................................................................................................. 35
7.5 Tilt Base Rotation ............................................................................................................................................... 36
7.6 Plastic Material .................................................................................................................................................. 36
7.7 GAP Spec............................................................................................................................................................ 37
8. POWER LINE TRANSIENT TEST (IEC 61000-4-4 FAST TRANSIENTS/BURST) ................... 38
8.1 Peak Voltage: ..................................................................................................................................................... 38
8.2 Polarity
: + / - ............................................................................................................................................. 38
8.3 Repetition Frequency of the impulse : 5 KHz..................................................................................................... 38
8.4 Rise-Time : 5ns
± 30% ..................................................................................................................................... 38
8.5 Impulse Duration: 50 nS
± 30%......................................................................................................................... 38
8.6 Relation to Power Supply: Asynchronous .......................................................................................................... 38
8.7 Burst Duration: 15 ms
± 20% ............................................................................................................................38
8.8 Burst Period: 300 ms
± 20% .............................................................................................................................. 38
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8.9 Climatic Conditions: .......................................................................................................................................... 38
8.10 Test Procedure: .................................................................................................................................................. 38
9. POWER LINE SURGE TEST (IEC 61000-4-5 SURGE) ............................................................ 40
9.1 Climatic Condition ............................................................................................................................................. 40
9.2 Test Conditions:.................................................................................................................................................. 40
9.3
....................................................................................................................................................................... 40
9.4
....................................................................................................................................................................... 40
9.5
....................................................................................................................................................................... 40
9.6
....................................................................................................................................................................... 40
9.7 Display set high-resolution mode, AC input use AC 240V. ................................................................................ 40
10.ENVIRO
NMENT REQUIREMENT.............................................................................................. 41
10.1 Operating............................................................................................................................................................ 41
10.2 Storage or Shipment ........................................................................................................................................... 41
11. REGULATION COMPLIANCE .................................................................................................. 42
11.1 This product complies with the most current revisions of following regulations:.............................................. 42
11.2 Electrostatics Discharge (ESD).......................................................................................................................... 43
12.QUALITY AND RELIABILITY..................................................................................................... 44
12.1 QUALITY ASSURANCE ..................................................................................................................................... 44
12.2 RELIABILITY ..................................................................................................................................................... 44
Appendix A: PCBA ASSEMBLY...................................................................................................... 45
Appendix B: DISPLAY UNIT ASSEMBLY............................................................ ...............
47
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1. INTRODUCTION
1.1 Scope
This specification defines the requirements for the 17" 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 20
K
hours or more.
Comparison Chart of EP877/EP878
CML176SXW
CML178SXW B
Panel
Normal 17" panel
Hydis HT17E13-100-110
Normal 17" panel
Hydis HT17E13-100-110
Signal Interface
DSUB+DVI-D
DSUB+DVI-D
Sync Type for analog input
Separate / compatible /
Separate / compatible /
Color Temp user adjust Support
Support
DDC
DDC2B
DDC2B
Speaker
No
1W +1W
Headphone Jack
No
Yes
Microphone Jack
No
No
USB Hub
Not support
ed
Not support
ed
Tilt / Swivel
Yes / No
Yes / No
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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 : 50cm 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 220Vac
Ambient temperature
: 20
± 5°C (68 ± 9°F)
Analog input mode
:1280 x1024 /60Hz
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
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