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19" LCD Color Monitor AOC 912Sw
Service
Service
Service
Horizontal Frequency
30-83 kHz
TABLE OF CONTENTS
Description Page Description Page
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...........................…............6
4. Input/Output Specification............……………............8
4.1. Input Signal Connector............………….................8
4.2. Factory Preset Display Modes......…..................8
5. Panel Specification.....………………..................9
5.1. General Feature…….....………………..................9
5.2. Optical Characteristics………………………………10
5.3 Electrical Characteristics…………………………10
6. Block Diagram……...................…………................11
6.1 Software Flow Chart…………………...11
6.2.Electrical Block Diagram……………..….......13
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
7. Schematic……………......................................15
7.1 Main Board....……….......................................15
7.2 Power Board.….……....................................20
8.PCB Layout..…….......................................22
8.1. Main Board………........................................22
8.2. Power Board….......................................25
8.3. Key Board………............….......................27
9. Maintainability……….......................................28
9.1. Equipments and Tools Requirement..............28
9.2. Trouble Shooting………..............................29
9.2.1 Main Board…………..............................29
9.2.2 Power Board………..............................32
9.2.3 Key Board…………..............................34
10 White-Balance, Luminance adjustment...35
11. Monitor Exploded View………………..…....….......36
12. BOM List………………………………..……………37
13. Different Parts List.........…….……........................46
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19" LCD Color Monitor AOC 912Sw
Revision List
Revision Date Revision History TPV Model
A00 Mar.-22-2007 Initial release T97HM5DKWCMMFE
A01 May.-08-2007 Add TPVDW Model in Item 13 T97SM5MDWCA4NE
T98SM5DKWCA1NGE
A02 Nov.-07-2008 Add TPVDW Model in Item 13
T98SM5DKWCA1NBE
T98SM5DKWCA2NGE
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19" LCD Color Monitor AOC 912Sw
1. Monitor Specifications
Model number 912Sw
Driving system TFT Color LCD
Size 48cm(19.0" 16:10)
LCD Panel
Resolution
Pixel pitch 0.285mm(H) x 0.285mm(V)
Video R, G, B Analog lnterface
Separate Sync. H/V TTL
Display Color 16.2million Colors
Dot Clock 135MHz
Horizontal scan range 30 kHz - 83 kHz
Horizontal scan Size(Maximum) 410mm
Vertical scan range 55 Hz - 75 Hz
Vertical scan Size(Maximum) 256mm
Optimal preset resolution 1440 x 900(60 Hz)
Plug & Play VESA DDC2B™ ,CI
Input Connector D-Sub 15pin
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM, Positive
Power Source 100~240VAC, 47~63Hz
Power on: < 36W
Power Consumption
Standby: < 1W
Connector Type 15-pin Mini D-Sub
Signal Cable Type Detachable
Dimensions & Weight:
Physical
Characteristics
Environmental
Regulations CCC , cULus ,FCC,TCO 03,EPA,RoHS,TUV/GS
Height (with base) 358.00(mm)
Width 437.5(mm)
Depth 210.00(mm)
Weight (monitor only) 4.5(Kg)
Weight (with packaging) 5.5(Kg)
Temperature:
Operating 0°- +40°
Non-Operating -20° - 60°
Humidity:
Operating 10% to 85% (non-condensing)
Non-Operating 5% to 80% (non-condensing)
Altitude:
Operating 0~3000m (0~10000 ft)
Non-Operating 0~5000m (0~15000 ft)
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19" LCD Color Monitor AOC 912Sw
2. LCD Monitor Description
The LCD MONITOR will contain a main board, a power board, an audio board and a 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.
Power board
(Include: adapter, inverter)
AC-IN
100V-240V
CCFL Drive.
Monitor Block Diagram
Flat Panel and
CCFL backlight
Main board
Audio board
Key board
HOST Computer
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
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19" LCD Color Monitor AOC 912Sw
3. Operating Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The control buttons are located in the front 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
1. Power Button & Indicator 2. < / Brightness
3. > / Contrast 4. Auto Config / Exit
5. Menu / Enter
• Power Button / Power Indicator: Press this button to turn the monitor ON or OFF.
Green — 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 Volume Adjust OSD status.
• > / Contrast : This button will activate the Contrast control when the OSD is OFF or navigate through adjustment
icons when OSD is ON or adjust a function when function is activated.
• < / Brightness: This button will activate the Brightness control when the OSD is OFF or navigate through
adjustment icons when OSD is ON or adjust a function when function is activated.
• Auto Config / 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.
NOTES:
• Do not install the monitor in a location near heat sources such as radiators or air dusts, or in a place subject to direct
sunlight, or excessive dust or mechanical vibration or shock.
• Save the original shipping box 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 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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19" LCD Color Monitor AOC 912Sw
3.3 Adjusting the Picture
Adjustment steps:
1. Press the MENU-button to activate the OSD window.
2. Press < or > to select the desired function.
3. Press the MENU-button to select the function that you want to adjust.
4. Press < or > to change the settings of the current function.
5. To exit and save, select the exit function, or leave the monitor alone for 10 seconds. If you want to adjust any
other function, repeat steps 2-3.
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19" LCD Color Monitor AOC 912Sw
Main
Menu
Item
Main
Menu
Icon
Sub
Menu
Item
Sub Menu
Icon
Description
Luminance
Image Setup
Image Position
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 Color Temperature from EEPROM.
User / Red
User / Green
User / Blue
Sub
Menu
Item
Yes N/A Auto adjusting H/V position, focus, phase.
Sub Menu
Icon
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.
Red Gain from Digital-register.
Green Gain Digital-register.
Blue Gain from Digital-register.
Description
Color Temp.
No N/A Back to main OSD.
H. Position
V. Position
OSD Timeout
Language N/A Set OSD language
Information N/A
Yes N/A Clear each old status of Auto-configuration.
No N/A Do not execute reset, return to main menu.
N/A N/A Exit OSD
Adjust the horizontal position of the OSD.
Adjust the vertical position of the OSD.
Adjust the OSD timeout.
Show the resolution, H/V frequency and input port of
current input timing.
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19" LCD Color Monitor AOC 912Sw
4. Input/Output Specification
4.1 Input Signal Connector
PIN NO.
1. Red 9. +5V
2. Green 10. Detect Cable
3. Blue 11. Ground
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
DESCRIPTION
15 - Pin Color Display Signal Cable
PIN NO.
15
6
11 15
DESCRIPTION
10
4.2 Factory Preset Display Modes
STANDARD
Dos-mode
VGA
SVGA
XGA
SXGA
WXGA 1440 × 900 55.935kHz 59.8Hz
RESOLUTION
720 × 400 31.47kHz 70Hz
640 × 480 31.47kHz 60Hz
640 × 480 37.50kHz 75Hz
800 × 600 37.879kHz 60Hz
800 × 600 46.875kHz 75Hz
1024 × 768 48.363kHz 60Hz
1024 × 768 56.476kHz 70Hz
1024 × 768 60.021kHz 75Hz
1280 × 1024 64.00kHz 60Hz
1280 × 1024 80.00kHz 75Hz
HORIZONTAL
FREQUENCY
VERTICAL
FREQUENCY
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19" LCD Color Monitor AOC 912Sw
5 Panel Specification
5.1 Display Characteristics
5.2 Optical Characteristics
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19" LCD Color Monitor AOC 912Sw
5.3 Parameter guide line for CCFL Inverter
TFT LCD Module:
Back Light Unit:
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19" LCD Color Monitor AOC 912Sw
6. Block Diagram
6.1 Software Flow Chat
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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19" LCD Color Monitor AOC 912Sw
1) MCU initialize.
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
disappear.
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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19" LCD Color Monitor AOC 912Sw
6.2 Electric Block Diagram
6.2.1 Main Board
Crystal (14.318MHz)
(X401)
EEPROM
M24C16
(U403)
Scalar TSUM16AWK
(Include MCU, ADC, OSD)
(U401)
D-Sub
Connector
(CN405)
H sync
V sync
RGB
LCD interface
CN101)
EEPROM
M24C02
U404
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19" LCD Color Monitor AOC 912Sw
6.2.2 Inverter / Power Board
AC inlet Filter
Rectifier and
filter
Start circuit R904, R931, R938
Switching circuit
PWM control
IC&MOSFET
On/off control
Start circuit
PWM control IC
Transform
er
OVP/OCP circuit
Push-pull
circuit
Rectifier and
filter D908,
D909
To main board
Feedback
circuit IC902,
IC903
LC resonant
12V/5V
12V
Lamp
Dimming control
Feedback circuit
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19" LCD Color Monitor AOC 912Sw
7. Schematic
7.1 Main Board
TSUM16AWK SCHEMATIC
VCC3.3
XGA/SXGA
B3
+5V
+5V
GNDR
GNDG
SOG
GNDB
HSYNC
VSYN C
DDCA_SDA
DDCA_SCL
DET_VGA
DDC_WP
CLK+
CLK-
DDCD_SDA
DDCD_SCL
DET_DVI
RIN
GIN
BIN
R+
R-
G+
GB+
B-
B4
RIN
GNDR
GIN
GNDG
SOG
BIN
GNDB
HSYNC
VSYN C
DDCA_SDA
DDCA_SCL
DET_VGA
DDC_WP
R+
RG+
GB+
BCLK+
CLKDDCD_SDA
DDCD_SCL
DET_DVI
LVDS OUTPUT
VCC3. 3
VCC1.8
VCC1.8
Vcc3. 3
+5V
+12V
+5V
+12V
3.INP UT
B5
PA[0.. 7]
PA[8.. 13]
PA[14..19]
+12V
+3V3
VCC1.8
+5V
B2
+12V
+3V3
VCC1.8
+5V
VCC3.3
on_BACKLIGHT
on_Panel
on_PANEL_12V
VCTRL
Adj_BACKLIGHT
VLCD
VLCD_12V
VLCD VLCD_12V
on_BACKLIGHT
on_Panel
on_PANEL_12V
VCTRL
Adj_BACKLIGHT
4.SCALER
PB[0.. 5]
PB[6.. 11]
PB[12..23]
GPO[0.. 4]
ESP
OSP
2.POW ER
PA[0.. 7]
PA[8.. 13]
PA[14.. 19]
PB[0.. 5]
PB[6.. 11]
PB[12.. 23]
GPO[0.. 4]
PA[0.. 7]
PA[8.. 13]
PA[14.. 19]
PB[0.. 5]
PB[6.. 11]
PB[12.. 23]
GPO[0.. 4]
ESP
OSP
VLCD_12V
VLCD
VLCD
VLCD_12V
5.PANEL INTERFACE
Tit le
Size Document Number Rev
B
Date: Sheet
715G1558-C-BJ.DSN
TOP
15Friday , July 21, 2006
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