AOC 197pk2 Schematic
19" LCD Color Monitor AOC 197Pk2
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...........................…............5
4. Input/Output Specification............……………............8
4.1 Input Signal Connector............…..……................8
4.2 Factory Preset Display Modes.........................9
5 Panel Specification.....…………………........................10
5.1 Display Characteristics………………………………10
5.2 Optical Characteristics………………………………..10
5.3 Parameter guide line for CCFL Inverter……………..11
6.Block Diagram…….…................………….........12
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
SAFETY NOTICE
6.1 Software Flow Chat…….…..........………….........12
6.2 Electrical Block Diagram………...………...…......14
7. Schematic……………………………………………. 16
7.1 Main Board…………..............................................16
7.2 Power Board....……………....................................21
8. PCB Layout..………….......................................23
8.1 Main Board……………......................................23
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
1
19" LCD Color Monitor AOC 197Pk2
Revision List
Revision Date Revision History TPV Model
A00 Mar.-20-2008 Initial release T97HMJDBF1A1DNE
2
19" LCD Color Monitor AOC 197Pk2
1. Monitor Specifications
Model number 197Pk2
Driving system TFT Color LCD
Size 48.0cm ( 19" 4:3)
LCD Panel
Resolution
Physical
Characteristics
Environmental
Pixel pitch 0.294mm(H) x 0.294mm(V)
Video R, G, B Analog interface & Digital Interface
Separate Sync. H/V TTL
Display Color 16.7 million Colors
Dot Clock 135 MHz
Horizontal scan range 30 kHz - 83 KHz
Horizontal scan
Size(Maximum)
Vertical scan range 55 Hz - 75 Hz
Vertical scan
Size(Maximum)
Optimal preset
resolution
Highest preset
resolution
Plug & Play VESA DDC2B/CI
Input Connector D-Sub 15pin & DVI-D
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM, Positive & DVI-D Digital Interface (TMDS)
Power Source 100~240VAC, 47~63Hz
Power Consumption
Connector Type 15-pin Mini D-Sub & DVI-D
Signal Cable Type Detachable
Dimensions & Weight:
Height (with base)
Width
Depth
Weight (monitor only)
Weight (with
packaging)
Temperature:
Operating 5° to 35°
Non-Operating -20¡ãto 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 )
376.32mm
301.056mm
1280 x 1024 (60 Hz)
1280 x 1024 (75 Hz)
Active < 37W
Standby < 2W
414.5 mm
413 mm
255.65 mm
6.0 kg
7.5 kg
3
19" LCD Color Monitor AOC 197Pk2
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.
PWPC board
(Include: adapter, inverter)
AC-IN
100V-240V
Monitor Block
CCFL Drive.
Main Board
Keyboard
Flat Panel and
CCFL backlight
HOST Computer
RS232 Connector
For white balance
adjustment in factory
mode
Video signal DDC
4
19" LCD Color Monitor AOC 197Pk2
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 4. Eco Mode/ down
2. Menu / Enter 5. Volume / Up
3. Power Button & Indicator
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.
• Press Exit key continually for 7 sec. to turn on or off DDC-CI.
5
19" LCD Color Monitor AOC 197Pk2
Luminance Adjust Range Description
Brightness 0-100 Backlight Adjustment
Contrast 0-100 Contrast from Digital-register.
Standard Standard Mode
Text Text Mode
Eco
Gamma
DCR
Image Setup
Clock 0-100 Adjust picture Clock to reduce Vertical-Line noise.
Focus 0-100 Adjust Picture Phase to reduce Horizontal-Line noise
H.Position 0-100 Adjust the vertical position of the picture.
V.Position 0-100 Adjust the horizontal position of the picture.
Color Temp.
Warm
Normal
Cool
sRGB
User
Color Boost
Full Enhance on or off Disable or Enable Full Enhance Mode
Nature Skin on or off Disable or Enable Nature Skin Mode
Green Field on or off Disable or Enable Green Field Mode
Sky-blue on or off Disable or Enable Sky-blue Mode
AutoDetect on or off Disable or Enable AutoDetect Mode
Demo on or off Disable or Enable Demo
Picture Boost
Frame Size 14-100 Adjust Frame Size
Brightness 0-100 Adjust Frame Brightness
Contrast 0-100 Adjust Frame Contrast
Hue 0-100 Adjust Frame Hue
Saturation 0-100 Adjust Frame Saturation
Position
Bright Frame on or off Disable or Enable Bright Frame
OSD Setup
H.Position 0-100 Adjust the vertical position of OSD
Internet Internet Mode
Game Game Mode
Movie Movie Mode
Sports Sports Mode
Gamma1 Adjust to Gamma1
Gamma2 Adjust to Gamma 2
Gamma3 Adjust to Gamma 3
Off Disable dynamic contrast ratio
On Enable dynamic contrast ratio
User-B Blue Gain from Digital-register
User-G Green Gain Digital-register.
User-R Red Gain from Digital-register
User-Y Yellow Gain from Digital-register
User-C Cyan Gain from Digital-register
User-M Magenta Gain from Digital-register
H. position Adjust Frame horizontal Position
V.position Adjust Frame vertical Position
Recall Warm Color Temperature from EEPROM.
Recall Normal Color Temperature from EEPROM.
Recall Cool Color Temperature from EEPROM.
Recall SRGB Color Temperature from EEPROM.
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19" LCD Color Monitor AOC 197Pk2
V.Position 0-100 Adjust the horizontal position of OSD
Timeout 5-100 Adjust the OSD Timeout
Language
Extra
Input Select
Auto Config yes or no Auto adjust the picture to default
Reset yes or no Reset the menu to default
DDC-CI Turn ON/OFF DDC-CI Support
Information
Digital Select Digital Sigal Source as Input
Analog Select Analog Sigal Source as Input
Select the OSD language
Show the information of the main image and sub-image source
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19" LCD Color Monitor AOC 197Pk2
4. Input/Output Specification
4.1 Input Signal Connector
4.1.1 D-SUB connector
PIN NO. DESCRIPTION PI N NO. DESCRIPTION
1
2
3
4
5
6
7
8
Video-Red
Video-Green
Video-Blue
N.C.
Ground
GND-R
GND-G
GND-B
VGA connector layout
15
6
11 15
9
10
11
12
13
14
15
+5V
Detect Cable
N.C.
DDC-Serial data
H-sync
V-sync
DDC-Serial clock
10
4.1.2 DVI-D connector
Pin No.
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 -
Signal Name
24 - Pin Color Display Signal Cable
Pin No.
Signal Name
8
19" LCD Color Monitor AOC 197Pk2
4.2 Factory Preset Display Modes
Standard Resolution
Dos-mode 720 x 400 31.47 70
640 x 480 31.47 60
VGA
SVGA
XGA
SXGA
640 x 480 35.00 67
640 x 480 37.50 75
640 x 480 37.86 72
800 x 600 37.879 60
800 x 600 46.857 75
800 x 600 35.16 56
800 x 600 48.01 72
832 x 624 49.725 75
1024 x 768 48.363 60
1024 x 768 56.476 70
1024 x 768 60.02 75
1280 x 1024 64.00 60
1280 x 1024 80.00 75
Horizontal
Frequency (kHz)
Vertical
Frequency (Hz)
9
19" LCD Color Monitor AOC 197Pk2
5 Panel Specification
5.1 Display Characteristics
5.2 Optical Characteristics
10
19" LCD Color Monitor AOC 197Pk2
5.3 Parameter guide line for CCFL Inverter
1.TFT LCD Module:
2.Back Light Unit:
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19" LCD Color Monitor AOC 197Pk2
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 197Pk2
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 197Pk2
6.2 Electric Block Diagram
6.2.1 Main Board
FLASH MEMORY
PM25LV010A
(U402)
H sync
V sync
RGB
D-Sub
Connector
(CN405)
LCD Interface
(CN101)
Scalar TSUMO5PHJ
(Include :MCU,ADC,OSD etc)
(U401)
RGB
EEPROM
M24C16
(U403)
DCLK+
DCLK-
DVID
Connector
(CN406)
EEPROM
M24C02
(U404)
EEPROM
M24C02
(U405)
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19" LCD Color Monitor AOC 197Pk2
6.2.2 Inverter / Power Board
AC input
EMI filter
Start Circuit: R905、R906、
R907、R908、R909、R910
Lamp
OSC and
Output
Circuit
Feedback
Circuit
Bridge
Rectifier
and Filter
PWM
Control IC
Over Voltage
Protect
DC Convert
Circuit
Transformer
PWM
Control IC
Rectifier
diode
MOSFET
PWM
Over
Voltage
Protect
12V
ON/OFF
ON/OFF Control
DIM
5V
15
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