AOC VIT TFT1780PS User manual

17” LCD Color Monitor QDI TFT1780PSA
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Service
Service
Service
Horizontal Frequency
30-80 KHz
TABLEOFCONTENTS
Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
Table Of Contents.......…….....…….........................…..................….……………............................1
Revision List.….................…..…......................……................….……………...........……………….2
1.Monitor Specification............…..................………..........………….…..…............……..............….3
2.LCD Monitor Description……..……………………….......………….…..…............……..................4
3.Operation Instruction……………...............……............………….…..…............……..............…..5
3.1 General Instructions.....……......................…...........………….…..…............……...................5
3.2 Control Button…………….…..…............……................………….…..…............……..............5
3.3 Adjusting the Picture...........................…............………….…..…............……...............…….7
4.Input/Output Specification.........….……………...........………….…..…............……..............……..9
4.1 Input Signal Connector.…...........…………..................………….…..…............……..............9
4.2 Factory Preset Display Modes.....………....................………….…..…............……..............9
4.3 Panel Specification...……..……………….................………….…..…............……................10
5.Schematic……………....................................…………….…..…............……...............…………12
5.1 Main Board.…….............................................………….…..…............……...............…….12
5.2 Power Board..………..……...............................………….…..…............……................……16
6.PCB Layout..………….......................................………….…..…............……................…………18
6.1 Main Board…………….…......................................………….…..…............…….................18
6.2 Power Board……………........................................………….…..…............……................20
7.BOM List………….…............................................………….…..…............……..................22
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

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Revision List
Revision Date Revision History TPV Model
A00 Jul-20-06 Initial Release T782KACHBPG2A

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1. Monitor Specifications
Driving system TFT Color LCD
LCD Panel Size 43.2cm(17.0")
Pixel pitch 0.264mm( H ) × 0.264mm( V )
Viewable angle
140°(H) 140°(V)
Video R,G,B Analog Interface
Input Separate Sync. H/V TTL
H-Frequency 30kHz – 80kHz
V-Frequency 55-75Hz
Display Colors 16.2M Colors
Dot Clock 135MHz
Max. Resolution 1280 × 1024 @75Hz
Plug & Play VESA DDC1/2BTM
ON Mode <45W
EPA ENERGY
STAR® OFF Mode ≤3W
Input Connector 15-pin D-Sub
Input Video Signal Analog:0.7Vp-p(standard),
75 OHM, Positive
Maximum Screen
Size Horizontal : 338mm Vertical : 270mm
Power Source 100~240VAC,47~63Hz
Environmental
Considerations
Operating Temp: 5° to 35°C
Storage Temp.: -20° to 60°C
Operating Humidity: 10% to 85%
Dimension 407×434×173(W×H×D)mm
Weight (N. W.) 5.2kg Unit (net)
Power Consumption ( Maximum ) 45 Watts
Audio Output Rated Power 2W rms
(Per channel)
Regulatory Compliance UL, CE, TCO’99

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2. LCD Monitor Description
The LCD MONITOR will contain a main board, a power board and one key 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.
Monitor Block Diagram
HOST Computer
AC-IN
100V-240V
Power board
(
Include: ada
p
ter, inverter
)
Flat Panel and
CCFL backlight
Main Board
RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
Video signal,
Key board

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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 on the 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 position. The power indicator will light up.
3.2 Control Button
EXTERNAL CONTROLS
1. Power Key 4. > / Volume
2. LED 5. < / Volume
3. MENU/ENTER 6. Auto Adjust Key/Exit

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FRONT PANEL CONTROL
•Power Button:
Press this button to turn the monitor ON or OFF.
•MENU / ENTER:
Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD
menu when in Volume Adjust OSD status.
•> /Volume:
Activates the volume control when the OSD is OFF or navigate through adjustment icons when OSD is ON or
adjust a function when function is activated.
•< /Volume:
Activates the volume control when the OSD is OFF or navigate through adjustment icons when OSD is ON or
adjust a function when function is activated.
•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.
•Power Indicator:
Green — Power On mode.
Orange — Off mode.
NOTES
•Do not install the monitor in a location near heat sources such as radiators or air ducts, or in a place subject to
direct sunlight, or excessive dust or mechanical vibration or shock.
•Save the original shipping carton and packing materials, as they will come in handy if you ever have to ship your
monitor.
•For maximum protection, repackage your monitor as it was originally packed at the factory.
•To maintain the cleanness of your LCD display, wipe it periodically with clean and soft cloth. The screen may be
damaged by any liquid splash.
•To keep the monitor looking new, periodically clean it with a soft cloth. Stubborn stains may be removed with a
cloth lightly dampened with a mild detergent solution. Never use strong solvents such as thinner, benzene, or
abrasive cleaners, since these will damage the cabinet. As a safety precaution, always unplug the monitor before
cleaning it.

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3.3 Adjusting the Picture
1. Press the MENU-button to activate the OSD window. See figure 5.
2. Press < or > to select the desired function. See figure 5.
3. Press the MENU-button again to activate the highlighted function.
4. Press < or > to change the settings of the current function.
5. When the OSD window is active, it shows the input signal timing. The "H" stands for the horizontal frequency and
"V" for the vertical frequency.
6. To exit and save, select the exit function, or leave the monitor alone for 10 seconds. If you want to adjust another
function press MENU again and repeat steps 2-4.
The OSD Message

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The descriptions for function control LEDS
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.
7. Auto Center Used to center the picture automatically.
8. Language Multi-Language selection.
9. Dos-mode
selected
Dos-mode resolution selection for 720x400 @70Hz and
640x400 @70Hz
10.
Red Adjusts Red intensity.
11. Green Adjusts Green intensity.
12. Blue Adjusts Blue intensity.
13. C1 (Warm) Color Set the color temperature to warm white.
14. C2 (Cool) Color Set the color temperature to cool white.
15. Reset Clear each old status of Auto-configuration and re-do
auto-configuration.
16. Exit Save user adjustment and OSD disappear.
Notice: Generally, DOS mode is set to 720x400@70Hz. Your monitor is optimized for this resolution. If you system
is using another resolution such as 640x400@70Hz, select the DOS mode icon , then press < or > to select
640x400@70Hz. Then press the MENU button to confirm the selection. Turn the monitor OFF then back ON by
pressing the Power Button to activate the setup.

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4. Input/Output Specification
4.1 Input Signal Connector
D-SUB connector
15
610
11 15
15 - Pin Color Display Signal Cable
Pin No. Description Pin No. Description
1. Red 9. +5V
2. Green 10. Detect Cable
3. Blue 11. Ground
4. Ground 12. DDC-Serial Data
5. DDC-Return 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC-Serial Clock
8. B-Ground
4.2 Factory Preset Display Modes
Standard Resolution Horizontal
Frequency
Vertical
Frequency
Dos-mode 720 × 400 31.47kHz 70Hz
640 × 480 31.47kHz 60Hz
640 × 480 35.00kHz 66.6Hz
640 × 480 37.50kHz 75Hz
VGA
640 × 480 37.86kHz 72Hz
800 × 600 37.879kHz 60Hz
800 × 600 46.875kHz 75Hz
800 × 600 35.16kHz 56Hz
800 × 600 48.01kHz 72Hz
SVGA
832 × 624 49.725kHz 75Hz
1024 × 768 48.363kHz 60Hz
1024 × 768 56.476kHz 70Hz
XGA
1024 × 768 60.02kHz 75Hz
1280 × 1024 64.00kHz 60Hz
SXGA
1280 × 1024 80.00kHz 75Hz
Note: The factory preset mode for DOS is 720x400 @70Hz, user can optimize to DOS 640x400 @70Hz by running
the “How To Optimize The DOS Mode” on the previous pages.

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4.3 Panel Specification
4.3.1 Features
4.3.2 Display Characteristics

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4.3.3 Optical Characteristics

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5. Schematic
5.1 Main Board

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5.2 Power Board
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6. PCB Layout
6.1 Main Board

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6.2 Power Board