AOC 193P+ User manual

AOC 193P+
1
19” LCD MONITOR
193P+
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT
HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE
ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
SERVICE MANUAL

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Table of Content
Revision List…………………………………………………………………………………………………………. 3
1. Monitor Specifications………………………………………………………………………………………….. 4
2. LCD Monitor Description……………………………………………………………………………………….. 5
3. Operating Instructions………………………………………………………………………………………….. 6
3.1 General Instructions…………………………………………………………………………………………... 6
3.2 Front Panel Control…………………………………………………………………………………….……... 6
3.3 Adjusting the Picture………………………………………………………………………………………….. 7
4. Input/Output Specification……………………………………………………………………………………... 9
4.1 Input Signal Connector……………………………………………………………………………………….. 9
4.2 Factory Preset Display Modes……………………………………………………………………………….. 10
4.3 Power Supply Requirements………………………………………………………………………………… 10
4.4 Panel Specification………………………………………………………………………………………….… 11
4.4.1 General Feature……………………………………………………………………………….…………. 11
4.4.2 Optical Characteristics…………………………………………………………………………………… 12
4.4.3 Electrical Characteristics………………………………………………………………………………… 12
5. Block Diagram………………………………………………………………………………………………….… 14
5.1 Monitor Explored View………………………………………………………………………………………... 14
5.2 Software Flow Chart…………………………………………………………………………………………... 15
5.3 Electrical Block Diagram………………………………………………………………………………………. 17
5.3.1 Main Board………………………………………………………………………………………………… 17
5.3.2 Power/Inverter Board ……………………………………………………………………………………. 18
6. Schematic……………………………………………………………………………………………………….…. 19
6.1 Main Board……………………………………………………………………………………………………… 19
6.2 Power Board……………………………………………………………………………………….………… 26
7. PCB Layout……………………………………………………………………………………………………….. 29
7.1 Main Board……………………………………………………………………………………………………… 29
7.2 Power Board………………………………………………………………………….………………………. 31
7.3 Keypad Board……………………………………………………………………………………………………. 32
8. Maintainability…………………………………………………………………………………………………….. 33
8.1 Equipments and Tools Requirement………………………………………………………………………….. 33
8.2 Trouble Shooting…………………………………………………………………………………………….…. 34
8.2.1 Main Board……………………………………………………………………………………………….... 34
8.2.2 Power/Inverter Board…………………………………………………………………….. ………. ………. 37
8.2.3 Keypad Board……………………………………………………………………………………………….. 39
9. Check List……………………………………………………………………………………………..…. …. ……. 40
10. White-Balance, Luminance adjustment……………………………………………………………….……… 43
11. EDID Content……………………………………………………………………………………………………… 44
12. BOM List………………………………………………………………………………………………………....... 45

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Revision List
Version Date Revision History TPV Model Name
A00 Jan-18-06 Initial Release T980KA2NKLACN
A01 Sep-01-06 Add TPV Model in item 12 T95AM2NKBLAO3P

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1. Monitor Specifications
Items Description
Driving system TFT Color LCD
Type M190EN04 V5
Size 48cm (19.0")
Pixel pitch 0.294mm (H) x 0.294mm (V)
Viewable angle 140°(H) 135°(V)
Response time (type) 8 ms
Display Color 16.2M
Contrast Ratio 550:1
LCD Panel
White Luminance 270cd/m2
Sync. Type H/V TTL
Input Connector D-Sub 15pin, DVI 24pin
Input Video Signal Analog:0. 7Vp-p(standard), 75 OHM, Positive
Digital signal
H-Frequency 30kHz – 83kHz
Input
V-Frequency 55Hz -75Hz
ON Mode ≤45W
Power Consumption
OFF Mode ≤2W
Dot Clock 135MHz
Max. Resolution 1280 x 1024@75Hz
Plug & Play VESA DDC2BTM
Power Source 100~240VAC,47~63Hz
Power Consumption (Max) 28 Watts
Maximum Screen Size Horizontal : 376.32mm;Vertical: 301.056mm
Dimensions 415 mm (H) x406 mm (W) x246 mm (D)
Weight 6.0kg Unit (net)
Regulatory Compliance cULus, FCC, CE
Environmental
Considerations
Operating Temp: 5°C to 50°C
Storage Temp: -20°C to 60°C
Operating Humidity: 10% to 85%

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2. LCD Monitor Description
The LCD monitor will contain a main board, an inverter board, a keypad board and an adapter board which house the
flat panel control logic, brightness control logic and DDC.
The Inverter board will drive the backlight of panel and DC-DC conversion.
AC-IN
100-240V
Power Board
(Include Inverter and adapter)
Flat Panel and
CCFL Backlight
Main Board
Keyboard
RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
CCFL Drive.
Video signal, DDC
Monitor Block Diagram

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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 position. The power indicator will light up.
3.2 Front Panel Control
External Controls
No. Description No. Description
1. Auto Adjust Key/Exit 2. Brightness
3. Contrast 4. MENU/ENTER
5. LED 6. Power Key
•Power Button:
Press this button to switch ON/OFF of monitor’s power.
•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.
•Contrast:
Adjust contrast or functions adjust.
•Brightness:
Adjust brightness or functions 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 over 2 seconds to activate the Auto Adjustment function.
The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
•Power Indicator:
Green — Power On mode.
Red — Off mode.

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3.3 Adjusting The Picture
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 DESCRIPTION FOR CONTROL FUNCTION:
Main Menu
Item
Main
Menu
Icon
Sub Menu
Item
Sub Menu
Icon Description Adjust Range Reset Value
Contrast
Contrast from Digital-register. 0-100 Recall Cool
Contrast Value
Luminance
Brightness
Backlight Adjustment 0-100 Recall Cool
Brightness Value
Focus
Adjust Picture Phase to reduce
Horizontal-Line noise 0-100 Do Auto Config
Image Setup
Clock
Adjust picture Clock to reduce
Vertical-Line noise. 0-100 Do Auto Config
H. Position
Adjust the horizontal position of the
picture. 0-100 Do Auto Config
Image
Position V. Position
Adjust the vertical position of the
picture. 0-100 Do Auto Config
Warm N/A
Recall warm Color Temperature
from EEPROM. N/A
Cool N/A
Recall cool Color Temperature from
EEPROM. N/A
Color Temp.
sRGB N/A
Recall sRGB Temperature from
EEPROM. N/A
The Color
Temperature will
be set to Cool.
The User R/G/B
value (default is

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User / Red
Red Gain from Digital-register. 0-100
User /Green
Green Gain from Digital-register. 0-100
User / Blue
Blue Gain from Digital-register. 0-100
100) will not be
Modified by Reset
function.
Analog N/A
Select input signal from analog
source (D-Sub) N/A N/A
Input Select
Digital N/A
Select input signal from digital
source (DVI) N/A N/A
H. Position
Adjust the horizontal position of the
OSD. 0-100 50
V. Position
Adjust the vertical position of the
OSD. 0-100 50
OSD Setup
OSD
Timeout
Adjust the OSD timeout. 10-120 10
Language
Language N/A Select the language you like N/A
The Language
will be set to
English.
Information
Information N/A
Show the resolution, H/V frequency
and input port of current input
timing.
N/A N/A
Yes N/A
Clear each old status of
Auto-configuration and set the color
temperature to Cool.
N/A N/A
Reset
No N/A
Do not execute reset, return to main
menu. N/A N/A
Exit
N/A N/A Exit OSD N/A N/A

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4. Input/Output Specification
4.1 Input Signal Connector
15- Pin D-Sub Connector
Pin No. Description Pin No. Description
1. Red 9. +5V
2. Green 10. Logic Ground
3. Blue 11. RS-232RX
4. RS-232TX 12. DDC-Serial Data
5. DDC-Return 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC-Serial Clock
8. B-Ground
VGA connector layout
15
610
11 15
24 – Pin DVI Connector
Pin No. Description Pin No. Description
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 -
DVI Connector layout

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4.2 Factory Preset Display Modes
Standard Resolution Horizontal Frequency Vertical Frequency
Dos-mode 720 × 400 31.47kHz 70.0Hz
640 × 480 31.47kHz 60.0Hz
VGA
640 × 480 37.50kHz 75.0Hz
800 × 600 37.879kHz 60.0Hz
SVGA
800 × 600 46.875kHz 75.0Hz
1024 × 768 48.363kHz 60.0Hz
1024 × 768 56.476kHz 70.0Hz
XGA
1024 × 768 60.021kHz 75.0Hz
1280 × 1024 64.000kHz 60.0Hz
SXGA
1280 × 1024 80.000kHz 75.0Hz
4.3 Power Supply Requirement
A/C Line voltage range 100 V ~ 240 V
A/C Line frequency range 50 ±3Hz, 60 ±3Hz
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)
with a maximum of 1 half-wave missing per second
DC output Voltage 12VDC± 5％

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4.4 Panel Specification
4.4.1 General Feature

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4.4.2 Optical Characteristics
4.4.3 Electrical Characteristics
1. TFT LCD Module: Ta=25ºC

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2.Back Light Unit:

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5. Block Diagram
5.1 Monitor Exploded View

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5.2 Software Flowing Chart
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
15
Y
N
16
17
19
Y
N
18

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REMARK:
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 they’re 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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5.3 Electrical Block Diagram
5.3.1 Main Board
MCU
MTV512 MV 44PIN-PLCC
(U601)
Scalar TSU56AK
(Include ADC, OSD)
(U401)
EEPROM
M24C16
(U602)
EEPROM
M24C02-WMN6TP
(U301)
DVI Video
Signal
DB15_SDA,
DB15
_
SCL
EPR_SDA
EPR_SCL
LCD Interface
(CN503)
Key Board
Control
D-Sub
Connector
(CN301)
Crystal
14.318MHZ
(X401)
Crystal
24MHZ
(X601)
EEPROM
M24C02-WMN6TP
(U302)
DVI
Connector
(CN302)
H sync
V sync
RGB
TXD
RXD

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5.3.2 Power/Inverter Board

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6. Schematic
6.1 Main Board
715G1423 2 512 2
VAA4
VAA3
VAA1 VAA3
VAA1
VAA4
B5
5.PANEL INTERFACE
VLCD
PB[0..9]
PA[0..9]
TOP
B
TSU16/56AK FOR MYSON512 SWITCH
B
16Wednesday, October 06, 2004
Title
Size Document Number Rev
Date: Sheet of
TSU16/56AK SCHEMATIC
VCC3.3
VCPU
VLCD
B4
2.POWER
onPanel_5V/3.3V
onBACKLITE
AdjBACKLITE
VCC3.3
VCC1.8
VAA1
VAA2
VAA3
VAA4
VCC5V
VCC12V
VLCD
VCPU
VAA2
VLCD
VCPU
VCC12V
B3
6.MCU
onBACKLITE
onPANEL_5V/3.3V
SDA
INT
CSZ
DDC_DAT
ST_DET1
SCL
HWRESET
DDC_CLK
Volume
VCC5V
VCC12V
VCPU
RXD
TXD
AD0
AD1
AD2
AD3
DDC_WPDVI_DET
DDCCI_SEL
VCC1.8
VCC12V
PA[0..9]
VCC5V
B2
4.SCALER
RIN
GIN
SOG
BIN
GNDR
GNDG
GNDB
HSYNC
VSYNC
R+
R-
G-
G+
B+
B-
CLK+
CLK-
CSZ
SCL
SDA
HWRESET
INT
Volume
AdjBACKLITE
PA[0..9]
PB[0..9]
VCC1.8
VCC3.3
VAA1
VAA2
VAA3
VAA4
AD0
AD1
AD2
AD3
VCC1.8
B1
3.INPUT
RIN
GIN
BIN
VSYNC
GNDR
GNDG
GNDB
ST_DET1 HSYNC
SOGDDC_CLK
DDC_DAT
R+
R-
G-
G+
B+
B-
CLK+
CLK-
TXD
RXD
DDC_WP
DVI_DET
DDCCI_SEL
VAA2
PB[0..9]
VCC5V
VCC3.3