AOC EN5200-ei User manual

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SERVICE MANUAL
EN5200-ei Monitor
(With NEC(30-10) PANEL)
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE
EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT
GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF PUBLICATION AND
DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATA ：Oct-30-2003

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Table of Contents
Table of Contents ----------------------------------------------------------------------------- 02
Revision List ------------------------------------------------------------------------------------04
1. Monitor Specification ---------------------------------------------------------------------05
2. LCD Monitor Description ---------------------------------------------------------------05
3. Operation Instructions --------------------------------------------------------------------06
3.1 General Instructions ------------------------------------------------------------------06
3.2 Control Button -------------------------------------------------------------------------06
3.3 Adjusting The Picture ----------------------------------------------------------------06
4. Input/Output Specification ---------------------------------------------------------------08
4.1 Input Signal Connector --------------------------------------------------------------08
4.2 Factory Preset Display Modes -----------------------------------------------------08
4.3 Power Supply Requirements -------------------------------------------------------09
4.3.1 Input Requirements ------------------------------------------------------------09
4.3.2 Output Requirements --------------------------------------------------------10
4.4 Panel Specification (NEC) ----------------------------------------------------10
4.4.1 Panel Feature --------------------------------------------------------------------10
4.4.2 Display Characteristics ---------------------------------------------------------10
4.4.3 Optical Characteristics --------------------------------------------------------11
4.4.4 Parameter guide line for CCFL Inverter ------------------------------------11
5. Block Diagram -----------------------------------------------------------------------------12
5.1 Monitor Exploded View -------------------------------------------------------------12
5.2 Software Flow Chart ------------------------------------------------------------------13
5.3 Electrical Block Diagram -------------------------------------------------------------14

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5.3.1 Scalar Board ----------------------------------------------------------------------14
5.3.2 Inverter/Power Board -----------------------------------------------------------15
6. Schematic -----------------------------------------------------------------------------------16
7. PCB Layout ---------------------------------------------------------------------------------21
7.1 Main Board -----------------------------------------------------------------------------21
7.2 Inverter/Power Board ----------------------------------------------------------------22
8. Maintainability ------------------------------------------------------------------------------23
8.1 Equipments and Tools Requirements --------------------------------------------23
8.2 Trouble Shooting ----------------------------------------------------------------------24
9. White-Balance, Luminance Adjustment ----------------------------------------------27
10. EDID Content ------------------------------------------------------------------------------28
11. BOM List -----------------------------------------------------------------------------29～40

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Revision List
Revision Date Change Description

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1. MONITOR SPECIFICATIONS
ITEM SPECIFICATION
Display Area (mm) 301.1(H) x 228.1(V) (15.0-inch diagonal)
Number of Pixels 1024(H) x 768(V)
Pixel Pitch (mm) 0.297(H) x 0.297(V)
Color Pixel Arrangement RGB vertical stripe
Display Mode Normally white TN
Number of Colors 262144(6bit/color)
Brightness (cod / m²) 250cd/ m² (Typ.)
Viewing Angle -60-60(H), -55-45(V)( Typ)
Wide Viewing Angle Technology Optical Compensation Film
Surface Treatment Anti-glare
Electrical interface RSDS (1 pixel/clock)
Total Module Power (W) 10.5(Typ.)
Optimum Viewing Angle 6 O’clock
Module Size (mm) 326.0(w) x 251.0(H) x 12.0(D)
Module Weight (g) 1200
Backlight Unit CCFL, 2 tables, edge- light (top/bottom)
2. LCD MONITOR DESCRIPTION
The LCD MONITOR will contain a main board, an inverter/power board, keypad board, which house the
flat panel control logic, brightness control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main
board chips each voltage.
Power board
(
include: ada
p
ter, inverter
)
Flat Panel and
CCFL backlight
Main Board
Keyboard
RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
CCFL Drive.
AC-IN
100V-240V Video signal, DDC
Monitor Block Diagram

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3. OPERATING INSTRUCTIONS
3.1 GENERAL INSTRUCTIONS
Press the power button to turn the monitor on or off. The other control buttons are located
at front panel of the monitor. By changing these settings, the picture can be adjusted to
your personal preferences.
-The power cord should be connected.
-Connect the video cable from the monitor to the video card.
-Press the power button to turn on the monitor, the power indicator will light up.
3.2 CONTROL BUTTONS
3.2.1 KEY CONTROL
3.2.2 KEY FUNCTION
Hot keys Navigation Within OSD Without OSD
Menu MENU
Select Function or select
Sub menu Activate OSD main menu
Left Previous Item or Decrease
value Brightness Hot key
Right Next Item or Increase value Contrast Hot key
Exit / Auto AUTO Exit OSD or back to
previous menu Auto configuration
3.3 ADJUSTING THE PICTURE

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OSD TABLE:
1. Contrast Adjust the picture contrast.
2. Brightness Adjust the picture brightness.
3. Focus Adjust picture Focus.
4. Clock Adjust picture Clock.
5. H-
Position Adjust the horizontal position of the picture.
6. V.-Position Adjust the vertical position of the picture.
7Language Multi-Language selection
8. Red Adjusts Red intensity.
9. Green Adjusts Green intensity.
10. Blue Adjusts Blue intensity.
11. C1 (Warm) Color Set the color temperature to warm white.
12. C2 (Cool) Color Set the color temperature to cool white.
13.
Reset Clear each old status of Auto-configuration and re-do
auto-configuration.
14. Exit Save user adjustment and OSD disappear.

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4. INPUIT/OUTPUT SPECFICATION
4.1 INPUT SIGNAL CONNECTOR
PIN NO. DESCRIPTION PI N NO. DESCRIPTION
1. Red 9. +5V
2. Green 10. Detect Cable
3. Blue 11. NC
4. Ground 12. DDC-Serial Data
5. Ground 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC-Serial Clock
8. B-Ground
VGA Connector layout
15
610
11 15
4.2 FACTORY PRESET DISPLAY MODES：
VESA MODES
Horizontal Vertical
Mode Resolution Total Nominal Frequency
+/- 0.5kHz
Sync
Polarity Nominal Freq.
+/- 1 Hz
Sync
Polarity Nominal Pixel
Clock (MHz)
640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175
640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500
VGA 640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500
800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000
800x600@72Hz 1040 x 666 48.077 P 72.188 P 50.000
SVGA 800x600@75Hz 1056x625 46.875 P 75.000 P 49.500
1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000
1024x768@60Hz 1312x813 48.78 N 60.00 N 64.000
1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000
1024x768@72Hz 1304x798 57.515 P 72.074 P 75.000
1024x768@75Hz 1328x804 60.200 N 74.90 N 80.000
XGA
1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750

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IBM MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
+/- .5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock (MHz)
DOS 720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322
DOS 640x350@70Hz 800 x 449 31.469 N 70.087 P 25.175
MAC MODES
VGA 640x480@67Hz 864x525 35.000 N 66.667 N 30.240
SVGA 832x624@75Hz 1152x667 49.725 N 74.551 N 57.2832
Note: All modes will automatically optimize the screen size with “ AUTO-config “ function, except 3
Dos- Modes: 720 x 400@70hz, 640x350@70hz, 640x400@70hz
4.3 POWER SUPPLY REQUIREMENT
4.3.1 INPUT REQUIREMENT
PARAMETER RANGE CONDITION
Input Voltage 100 to 240VAC RMS Universal input full range
Input Frequency 60Hz @ 100VAC to 50Hz
@ 240VAC
Input Current Less than 2.0 Amps RMS Input voltage 100 VAC RMS; 60 Hertz. Parameter must be reached within 3 seconds
of turn-on.
Less than 1.0 Amps RMS Input voltage 220 VAC RMS ; 50 Hertz. Parameter must be reached within 3 seconds
of turn-on.
Input Power Less than 40 Watts
Power factor > 0.5 Input voltage 120 VAC RMS ; 60
Hertz
Inrush Current Less than 30 A peak Input voltage 100 VAC RMS; 60 Hertz at all
Phase (0, 90, 180, 270 degree)
Less than 50 A peak Input voltage 240 VAC RMS; 50 Hertz at all
Phase (0, 90, 180, 270 degree)
Input Fusing Fuse should be located internal to the adapter, easily accessible
when the cover is removed
Fuse must be UL/CSA approved. Fuse value
must no have to change for 115 VAC or 230
VAC operation
Leakage Current Less than 3.5 mA Input voltage 240 Volts RMS; 50 Hertz
Hi-Pot
Primary to secondary 1.5KVAC for 1 Minute (leakage current
10mA)
1.8KVAC for 1 Minute (leakage current
10mA)
3.0KVAC for 1 Minute (leakage current
10mA)
without Y-cap & Coupling cap.

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Primary to Safety Ground 1.5KVAC for 1 Minute (leakage current
10mA)
1.8KVAC for 1 Minute (leakage current
10mA)
4.3.2 OUTPUT REQUIREMENT
PARAMETER RANGE CONDITION
DC Out 12VDC ± 5% Min 0A Max 3.75A
Load Regulation 12.0V ± 5% 11.4 to 12.6VDC
Dynamic Load
Regulation Any frequency up to 250Hz(duty 50%)
±5% for 10% to 100%, 100% to 10% load
change for +12Vdc
Ripple & noise 170mVpp at 12VDC Input voltage: 100VAC at 60Hz 240VAC at 50Hz
* Ripple and noise are measured.
Output current
protection Less than 7.0A, more than 12.0A at 12.0VDC Current exceeds maximum rating more than 20%
Leakage Current Less than 0.25 mA Input voltage 100 Volts RMS; 50 Hertz
Less than 0.5 mA Input voltage 240 Volts RMS; 50 Hertz
4.4 PANEL SPECIFICATION (NEC)
4.4.1 PANEL FEATURE
－LVDS interface(8 bit)
－Selectable LVDS input map
－Wide color gamut
－High contrast
－Edge light type(Inverter less)
－Replace lamp for backlight
4.4.2 DISPLAYS CHARACTERISTICS
Items Specification Unit
Display Area 304.1 (H) x 228.1(V) mm
Driver element a-Si TFT active matrix
Display color 6-bits driver with LVDS I/F
Number of pixels 1024 x 768 pixel
Pixel Arrangement RGB vertical stripe
Pixel pitch 0.297(H) x 0.297(V) mm
Display Mode Normally White TN