AOC 197Va User manual
19" LCD Color Monitor AOC197Va
1
Service
Service
Service
Horizontal Frequency
30-83 kHz
TABLEOFCONTENTS
Description Page 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...........................…............6
4. Input/Output Specification............……………............7
4.1 Input Signal Connector............…..……................7
4.2 Factory Preset Display Modes.........................8
4.3 Power Supply Requirements…………………………8
5 Panel Specification.....…………………........................9
5.1 Display Characteristics………………………………9
5.2 Optical Characteristics………………………………..9
5.3 Parameter guide line for CCFL Inverter……………..10
6.Block Dia
g
ram…….…................………….........11
6.1 Software Flow Chat…….…..........………….........11
6.2 Electrical Block Diagram………...………...…......12
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……………….....................................28
8.4 Audio Board………………………………………….28
9. Maintainability……….......................................29
9.1. Equipments and Tools Requirement.....................29
9.2. Trouble Shooting…………....................................30
10. White-Balance, Luminance adjustment.................35
11.Monitor Exploded View……..……………............36
12. BOM List....……....................................................37
13.Different Parts List……………………………..……47
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
19" LCD Color Monitor AOC197Va
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Revision List
Revision Date Revision History TPV Model
A00 Dec.-27-2007 Initial release T97HMADCF1AOANE
A01 Dec.-18-2008 Add TPVDW Model In Item 13 T98HMADCF1ACANE
19" LCD Color Monitor AOC197Va
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1. Monitor Specifications
Driving system TFT Color LCD
Size 48.0cm ( 19" )
LCD Panel
Pixel pitch 0.294mm(H) x 0.294mm(V)
Video R,G,B Analog Interface & Digital Interface
Separate Sync. H/V TTL & TMDS
H-Frequency 30kHz – 83kHz
Input
V-Frequency 55-75Hz
Display Colors 16.7 million Colors
Dot Clock 135MHz
Max. Resolution 1280 × 1024 @75Hz
Plug & Play VESA DDC2BTM
ON Mode ≤37W
EPA ENERGY STAR®OFF Mode ≤2W
Input Connector 15-pin D-Sub& DVI-D
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM, Positive & DVI-D Digital Interface
(TMDS)
Maximum Screen Size Horizontal : 376mm
Vertical : 301mm
Power Source 100~240VAC,50/60Hz，1.5A
Environmental Considerations
Operating Temp: 0° to 50°C
Storage Temp.: -20° to 60°C
Operating Humidity: 10% to 80%
Dimension 412.5(W)×413(H)×215.9(D)mm
Weight (N. W.) 4.85kg Unit (net)
Audio Output Rated Power 1.5W rms
(Per channel)
Regulatory Compliance cULus, FCC, CE
19" LCD Color Monitor AOC 197Va
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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.
HOST Computer
AC-IN
100V-240V
PWPC board
(Include: adapter, inverter)
Flat Panel and
CCFL backlight
Main Board RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
Video signal DDC
Monitor Block
Keyboard
19" LCD Color Monitor AOC 197Va
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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
1. Auto Config 2. Menu / Enter
3. Power Button & Indicator 4. Volume / down
5. Volume / Up
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 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.
•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.
19" LCD Color Monitor AOC 197Va
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3.3 Adjusting the Picture
· Press the MENU-button to activate the OSD window.
· 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.
· Press+ or - to change the settings of the selected function. To exit and save, select the exit function. If you want
to adjust any other function, repeat steps 2-3.
· 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.
Main Menu
Item
Main Menu
Icon
Sub Menu
Item
Sub Menu
Icon Description
Contrast Contrast from Digital-register.
Luminance
Brightness Backlight Adjustment
Focus Adjust Picture Phase to reduce Horizontal-Line noise
Image Setup Clock Adjust picture Clock to reduce Vertical-Line noise.
H. Position Adjust the horizontal position of the picture.
Image Position V. Position Adjust the vertical position of the picture.
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 Red Gain from Digital-register.
User / Green Green Gain Digital-register.
Color Temp.
User / Blue Blue Gain from Digital-register.
Analog N/A Select input signal from analog source (D-Sub)
Input Select Digital N/A Select input signal from digital source (DVI)
H. Position Adjust the horizontal position of the OSD.
V. Position Adjust the vertical position of the OSD.
OSD Setup
OSD Timeout Adjust the OSD timeout.
Language Language N/A Set OSD language
Information Information N/A Show the resolution, H/V frequency and input port of
current input timing.
Yes N/A Clear each old status of Auto-configuration
Reset No N/A Do not execute reset, return to main menu.
Exit N/A N/A Exit OSD
19" LCD Color Monitor AOC 197Va
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4. Input/Output Specification
4.1 Input Signal Connector
4.1.1 D-SUB connector
PIN NO. DESCRIPTION PI N NO. DESCRIPTION
1 Video-Red 9 +5V
2 Video-Green 10 Detect Cable
3 Video-Blue 11 N.C.
4 N.C. 12 DDC-Serial data
5 Ground 13 H-sync
6 GND-R 14 V-sync
7 GND-G 15 DDC-Serial clock
8 GND-B
VGA connector layout
15
610
11 15
4.1.2 DVI-D connector
Pin No.
Signal Name Pin No.
Signal Name
1 TMDS Data 2- 13 TMDS Data 3+
2 TMDS Data 2+ 14 +5V Power
3 TMDS Data 2/4 Shield 15 Ground(for+5V)
4 TMDS Data 4- 16 Hot Plug Detect
5 TMDS Data 4+ 17 TMDS Data 0-
6 DDC Clock 18 TMDS Data 0+
7 DDC Data 19 TMDS Data 0/5 Shield
8 N.C. 20 TMDS Data 5-
9 TMDS Data 1- 21 TMDS Data 5+
10 TMDS Data 1+ 22 TMDS Clock Shield
11 TMDS Data 1/3 Shield 23 TMDS Clock +
12 TMDS Data 3- 24 TMDS Clock -
24 - Pin Color Display Signal Cable
19" LCD Color Monitor AOC 197Va
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4.2 Factory Preset Display Modes
Standard Resolution Horizontal
Frequency (kHz)
Vertical
Frequency (Hz)
Dos-mode 720 x 400 31.47 70
640 x 480 31.47 60
640 x 480 35 66.6
640 x 480 37.5 75
VGA
640 x 480 37.86 72
800 x 600 37.879 60
800 x 600 46.875 75
800 x 600 35.16 56
800 x 600 48.01 72
SVGA
832 x 624 49.725 75
1024 x 768 48.363 60
1024 x 768 56.476 70
XGA
1024 x 768 60.02 75
1280 x 1024 64 60
SXGA 1280 x 1024 80 75
19" LCD Color Monitor AOC 197Va
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5 Panel Specification
5.1 Display Characteristics
5.2 Optical Characteristics
19" LCD Color Monitor AOC 197Va
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5.3 Parameter guide line for CCFL Inverter
1. TFT LCD Module:
2. Back Light Unit:
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