SONY 6805 Service Manual
17" LCD Color Monitor AOC 712Si
Service
Service
Service
Horizontal Frequency
30- 80 kHz
Table Of Contents
Description Page Description Page
Table Of Contents.......…….................……...........…........1
Important Safety Notice.………….…..................……......2
Revision List.…........................………................……......3
1.Product Feature..............................………........4
2.LCD Monitor Description…………………………….......6
3.Operation Instruction…………...............……...........7
3.1.General Instructions...........................…...........7
3.2.Control Buttons…………….…..............……...............7
3.3 Adjusting the Picture...........................…............8
4.Input/Output Specification............……………...........10
4.1.Analog Connector............…………........……….......10
4.2.Factory Preset Display Modes...............…..........10
5.Panel Specification.....………………..................11
5.1. General Feature…….....………………..................11
5.2. Optical Characteristics………………………………11
5.3. Electrical Characteristics……………………………12
6.Block Diagram…….…................…………................13
6.1.Monitor Exploded View……………………............13
6.2.Software Flow Chart…………………....….......14
6.3.Electrical Block Diagram…………..…..….......16
7.Schematic……………...............................….....17
7.1 Main Board.............................................17
7.2 Power Board....……...........……........................27
8.PCB Layout..…………...........……...........................29
8.1.Main Board………..................……....................29
8.2.Power Board…....................……………..................30
8.3.Key Board………........…................………............32
9.Maintainability………............................……….........33
9.1.Equipments and Tools Requirement......……….......33
9.2.Trouble Shooting…………..............................34
10.White-Balance, Luminance adjustment....................42
11.BOM List….................……......................….............43
12.Different Parts List………………………...…………..58
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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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 might 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
Revision List
Revision Date Revision History TPV Model
A00 Apr.-21-2007 First Version Release
T77CNNNKHAA1FIE
T77CNNMDHAA4NIE
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17" LCD Color Monitor AOC 712Si
1. Product Feature
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 DDC2BTM
EPA ENERGY STAR® ON Mode ≤37W
OFF Mode ≤1W
Input Connector 15-pin D-Sub
External
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 Operating Temp: 5° to 35°C
Considerations Storage Temp.: -20° to 60°C
Operating Humidity: 10% to 85%
Dimension 399(H)×433(W)×133(D)mm
Weight (N. W.) 4.25kg Unit (net)
Switch Auto Adjust Key
Brightness
Contrast
Power Button
MENU
Functions Contrast
Controls:
Brightness
Focus
Clock
H. Position
V. Position
Auto Config
Language
Information
OSD Setup
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17" LCD Color Monitor AOC 712Si
(Warm)Color
(Cool)Color
User Color temperature
sRGB
Reset
Exit
Regulatory Compliance CE, FCC, cULus, TUV-S
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17" LCD Color Monitor AOC 712Si
(
)
2. LCD Monitor Description
The LCD MONITOR will contain a main board, a power board, a key board and an audio board which house the flat
panel control logic, brightness control logic and DDC.
The power board will provide AC to DC voltage to drive the backlight of panel and the main board chips each
voltage.
Power Board
Include Adapter and Inverter
Monitor Block Diagram
CCFL Drive.
Flat Panel and
CCFL backlight
Main Board
RS232 Connector
For white balance
adjustment in factory
mode
Audio Board
Key Board
OK
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 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, the power indicator will light up.
-
3.2 Control Buttons
3 4 5
1 2
1. Auto Adjust button / Exit 2. / Brightness
3. Power Button/ LED 4. / Contrast
5. MENU / ENTER
• 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 /Contrast Adjust 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.
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17" LCD Color Monitor AOC 712Si
3.3 Adjusting The Pictures
1. Press the MENU-button to activate the OSD window.
2. Press
< or > to navigate through the functions. Once the desired function is highlighted, press the MENU-button
to activate it. If the function selected has a sub-menu, press
< or >again to navigate through the sub-menu
Functions. Once 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.
The table below describes the function of each OSD icon.
Main
Menu
Item
Main
Menu Icon
Sub
Menu
Item
Sub Menu
Icon
Description
Image Setup
Image Position
Color Temp.
Contrast
Brightness
Focus
Clock
H. Position
V. Position
Warm N/A Recall Warm Color Temperature from EEPROM.
Cool N/A Recall Cool Color Temperature from EEPROM.
sRGB N/A Recall sRGB Temperature from EEPROM.
User / Red
Contrast from Digital-register. Luminance
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 verticalposition of the picture.
Red Gain from Digital-register.
User / Green
User / Blue
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
Yes
No N/A Do not execute Auto Config, return to main menu.
H. Position
V. Position
OSD Timeout
Language N/A
Information N/A Show the resolution, H/V frequency and input port of
Yes N/A Clear each old status of Auto-configuration. Reset
N/A Auto Adjust the H/V Position, Focus and Clock of
picture.
Adjust the horizontal position of the OSD.
Adjust the verticalposition of the OSD.
Adjust the OSD timeout.
Set OSD language
current input timing.
Exit
No N/A Do not execute reset, return to main menu.
N/A N/A Exit OSD
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17" LCD Color Monitor AOC 712Si
4. Input/Output Specification
4.1 D-SUB connector
Pin No. Description Pin No. Description
1. Red 9. +5V
2. Green 10. Detect Cable
3. Blue 11. TXD
4. RXD 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
6
11 15
10
4.2 Factory Preset Display Modes
STANDARD
Dos-mode 720 x 400 31.47kHz 70.0Hz
VGA
SVGA
XGA
SXGA
RESOLUTION
640 × 480 31.47kHz 60.0Hz
640 × 480 37.50kHz 75.0Hz
800 × 600 37.879kHz 60.0Hz
800 × 600 46.875kHz 75.0Hz
1024 × 768 48.363kHz 60.0Hz
1024 × 768 56.476kHz 70.0Hz
1024 × 768 60.021kHz 75.0Hz
1280 × 1024 64.000kHz 60.0Hz
1280 × 1024 80.000kHz 75.0Hz
HORIZONTAL
FREQUENCY
VERTICAL
FREQUENCY
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17" LCD Color Monitor AOC 712Si
5. Panel Specification
5.1 General Characteristics
5.2 Optical Characteristics
The optical characteristics are measured under stable conditions at 25±2 (Room Temperature)℃ ：
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17" LCD Color Monitor AOC 712Si
5.3 Electrical Characteristics
TFT LCD MODULE
BACKLIGHT UNIT
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17" LCD Color Monitor AOC 712Si
6. Block Diagram
6.1 Monitor Exploded View
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17" LCD Color Monitor AOC 712Si
6.2 Software Flow Chart
1
2
N
4
5
Y
6
Y
N
3
N
10
12
14
7
Y
9
Y
Y
N
N
13
15
17
11
8
N
Y
N
Y
16
18
N
19
Y
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17" LCD Color Monitor AOC 712Si
1) MCU initializes.
2) Is the EEPROM blank?
3) Program the EEPROM by default values.
4) Get the PWM value of brightness from EEPROM.
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 EEPROM. Turn on the LED and set it to green color. Scaler 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.
18) Process the OSD display.
19) Read the keyboard. Is the power key pressed?
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17" LCD Color Monitor AOC 712Si
6.3 Electrical Block Diagram
6.3.1 Main Board
6.3.2 Inverter/Power Board
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17" LCD Color Monitor AOC 712Si
7. Schematic
7.1 Main Board
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17" LCD Color Monitor AOC 712Si
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