12.Different Part list…...........................................55
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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17” LCD Color Monitor AOC 712Si
REVISION LIST
Revision Date Revision History TPV Model
A00 Feb-05-07 Initial Release T76CNNNQHAACNJ
A01 Mar-19-07 Add the Different Part List T76CNNNQHAA3FJ
T76CNNNQHAA4FJ
T76CNNNQHAA5FJ
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17” LCD Color Monitor AOC 712Si
Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock,
fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)
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17” LCD Color Monitor AOC 712Si
1. Monitor Specifications
Items Descriptions
Driving system TFT Color LCD
LCD Panel Size 43.2cm(17.0")
Pixel pitch 0.264mm( H ) × 0.264mm( 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 DDC2B
ON Mode ≤37W
EPA ENERGY STAR®
OFF Mode ≤1W
Input Connector 15-pin D-Sub
Input Video Signal
Maximum Screen Size
Power Source 100~240VAC,47~63Hz
Environmental
Considerations
Dimension 399(W)×433(H)×133(D)mm
Analog:0.7Vp-p(standard),
75 OHM, Positive
Horizontal : 338mm
Vertical : 270mm
Operating Temp: 5° to 35°C
Storage Temp.: -20° to 60°C
Operating Humidity: 10% to 85%
TM
Weight (N. W.) 4.25kg Unit (net)
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17” LCD Color Monitor AOC 712Si
(
2. LCD Monitor Description
The LCD MONITOR will contain a power board and key board.
The panel module will contain panel control logic, brightness control logic, CCFL backlight, signal processing, main
control and DDC etc.
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
CCFL Drive.
Flat Panel and
CCFL backlight
PWPC board
Include: adapter, inverter)
(Include: main board)
Panel
Keyboard
RS232 Connector
For white balance
adjustment in factory
mode
AC-IN
100V-240V
HOST Computer
Video signal, DDC
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17” LCD Color Monitor AOC 712Si
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 position. The power indicator will light up.
3.2 Control Buttons
- Power Button:
Press this button to turn the monitor ON or OFF.
- Power Indicator:
Blue — Power On mode.
Orange — Off mode.
- 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 Brightness /ContrastAdjust OSD status.
- Brightness :
Adjust brightness or function adjust.
- Contrast :
Adjust contrast or function adjust.
- 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.
OSD Lock Function: To lock the OSD, press and hold the MENU button while the monitor is off and then press
power button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while the monitor is off
and then press power button to turn the monitor on.
3 4 5
1 2
1. Auto Adjust button / Exit 2. / Contrast
3. Power Button/ LED 4. / Brightness
5. MENU / ENTER
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17” LCD Color Monitor AOC 712Si
3.3 Adjusting the Picture
1. Press the MENU-button to activate the OSD window.
2. Press < or > to select the desired function.
activate it. If the function selected has a sub-menu, press
the desired function is highlighted, press MENU-button to activate it.
3. Press < or > to change the settings of the selected function.
4. To exit and save, select the exit function. If you want to adjust any other function, repeat steps 2-3.
Once the desired function is highlighted, press the MENU-button to
<
or > again to navigate through the sub-menu functions. Once
Main Menu Item
Luminance
Image Setup
Image Position
Main Menu
Icon
Sub Menu
Item
Contrast
Brightness
Focus
Clock
H. Position
V. Position
Sub Menu
Icon
Description
Contrast from Digital-register.
Backlight Adjustment
Adjust Picture Phase to reduce Horizontal-Line noise
Adjust picture Clock to reduce Vertical-Line noise.
Adjust the horizontal position of the picture.
Adjust the vertical position of the picture.
Color Temp.
User / Red
User / Green
User / Blue
Warm N/A
Cool N/A
Recall warm Color Temperature from EEPROM.
Recall cool Color Temperature from EEPROM.
Red Gain from Digital-register.
Green Gain Digital-register.
Blue Gain from Digital-register.
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17” LCD Color Monitor AOC 712Si
Auto Config
OSD Setup
Language
Information
Reset
Yes N /A
Auto adjust the H/V Position,
Focus and clock of picture
No N/A
H. Position
Do not execute Auto config return to main menu.
Adjust the horizontal position of the OSD.
V. Position
OSD Timeout
Adjust the vertical position of the OSD.
Adjust the OSD timeout.
Language N/A
Set OSD language.
Information N/A
Yes N /A
No N/A
Show the resolution, H/V frequency and input port of
current input timing.
Clear each old status of Auto-configuration and set
the color temperature to Cool.
Do not execute reset, return to main menu.
Exit
4. Input/Output Specification
4.1 Input Signal Connector
D-SUB connector
Pin No. Description Pin No. Description
1. Red Video 9. +5V Supply
2. Green Video 10. Logic Ground
3. Blue Video 11. Monitor Ground
4. Monitor Ground 12. DDC-Serial Data
5. DDC-Return 13. H-Sync
6. Red Ground 14. V-Sync
7. Green Ground 15. DDC-Serial Clock
8. Blue ground
N/A N/A
Exit OSD
Analog Connector
15
6
1115
10
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17” LCD Color Monitor AOC 712Si
4.2 Factory Preset Display Modes
VESA MODES
Horizontal Vertical
Nominal
Mode Resolution Total
640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175
VGA
SVGA
XGA
640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500
640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500
800x600@56Hz 1024 x 625 35.156 N/P 56.250 N/P 36.000
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
800x600@75Hz 1056x625 46.875 P 75.000 P 49.500
1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000
1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000
1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750
Frequency
+/- 0.5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
SXGA
Horizontal Vertical
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
XGA 1024x768@72Hz 1304 x 798 57.515 P 72.1 P 75.000
VGA 640x480@67Hz 864 x 525 35.000 N 66.667 N 30.240
SVGA 832x624@75Hz 1152 x 667 49.725 N 74.551 N 57.2832
XGA 1024x768@60Hz 1312 x 813 48.780 N 60.001 N 64.000
1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000
1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.000
IBM MODES
MAC MODES
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17” LCD Color Monitor AOC 712Si
4.3 Power Supply
The power supply should be integrated to the monitor housing.
A/C Line voltage range : 100 V ~ 240 V
A/C Line frequency range
Current : 1.5A max at 100V; 0.8A max at 240 V
Peak surge current : < 55A peak at 240 VAC and cold starting
Leakage current : < 3.5mA
Power line surge : No advance effects (no loss of information or defect)
DC output Voltage
Current
4.4 Panel Specification
4.4.1 Display Characteristics
: 50 ± 3Hz, 60 ± 3Hz
With a maximum of 1 half-wave missing per second
: 5VDC ± 5%; 12VDC± 5%
1.5Amp (5V) ;2 Amp (12V)
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17” LCD Color Monitor AOC 712Si
4.4.2 Optical Characteristics
4.4.3 Parameter guide line for CCFL Inverter
TFT LCD Module:
Back Light Unit:
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17” LCD Color Monitor AOC 712Si
5. Block Diagram
5.1 Soft Flow Chart
1
2
N
4
5
Y
6
7
Y
N
N
3
18
9
10
Y
N
N
12
Y
14
19
N
11
13
15
17
N
Y
N
Y
16
Y
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17” LCD Color Monitor AOC 712Si
1) MCU initializes.
2) Is the EPROM blank?
3) Program the EPROM by default values.
4) Get the PWM value of brightness from EPROM.
5) Is the power key pressed?
6) Clear all global flags.
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9) Save the power key status into EPROM.
Turn on the LED and set it to green color.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are there any signals coming?
13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
15) Are there any signals coming from analog port?
16) Display "No connection Check Signal Cable" message. And go into standby mode after the message
disappears.
17) Program the scalar to be able to show the coming mode.