AOC 193P Schematic
19” LCD Color Monitor AOC 193P
Service
Service
Service
Horizontal Frequency
30kHz – 83kHz
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents.......……..……..........................…........1
Revision List.….............……..........................……......2
Important Safety Notice.…………....................……......3
1. Monitor Specification..............................………........4
2. LCD Monitor Description…………………………….......5
3. Operation Instruction…………...............……...........6
3.1 General Instructions...........................…...........6
3.2 Control Button…………….…..............……...............6
6.Schematic……………....................................…19
6.1 Main Board.… ……..……..........................................19
6.2 Inverter Board..………..……..................................25
6.3 Adapter Board..………..…….................................27
7.PCB Layout..……………….......................................28
7.1 Main Board…………….........................................28
7.2 Inverter Board…..………...................................31
7.3 Adapter Board………….....................................33
3.3 Adjusting the Picture...........................…............8
4. Input/Output Specification............……………............10
4.1 Input Signal Connector............……….…….................10
4.2 Factory Preset Display Modes.....................................11
7.4 Key Board………………….......................................33
8. Maintainability……….......................................34
8.1 Equipments and Tools Requirement……..............34
8.2 Trouble Shooting…….………..............................34
N
4.3 Panel Specification.....………….…..…..…..................12
5. Block Diagram……...................…………................15
5.1 Software Flow Chart……………….…………....….......15
5.2 Electrical Block Diagram….………………….....…...17
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
9. White-Balance, Luminance adjustment.............40
10. Monitor Exploded View……….…...…………............41
11. BOM List……….....................................................42
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
1
19” LCD Color Monitor AOC 193P
Revision List
Revision Date Revision History TPV Model
A00 Aug-29-06 Initial Release
T94AM2HCBMPUNP
T980KA2HCSION
2
19” LCD Color Monitor AOC 193P
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 may 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 radiati on exp os ur e.
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 P ARTS 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.)
3
19” LCD Color Monitor AOC 193P
10% to 85%
1. Monitor Specifications
Driving system TFT Color LCD
LCD Panel
Input
Display Colors
Dot Clock
Max. Resolution
Plug & Play
EPA ENERGY STAR®
Input Connector
Size 48cm(19")
Pixel pitch 0.294mm( H ) × 0.294mm( V )
R,G ,B Analog Interface
Video
Digital Interface
Separate Sync. H/V TTL
H-Frequency 30kHz – 83kHz
V-Frequency 55-75Hz
16.2M Colors
135MHz
1280 × 1024 @75Hz
VESA DDC 2B
ON Mode ≤37W
OFF Mode ≤1W
15-pin D-Sub
DVI 24pin
TM
Input Video Signal
Maximum Screen Size
Power Source
Environmental
Considerations
Dimension
Weight (N. W.)
Power Consumption ( Maximum )
Regulatory Compliance
100~240VAC,50~60Hz
406×407×214 (W ×H×D)mm
4.6kg Unit (net)
Analog:0.7Vp-p(standard),75 OHM, Positive
Digital signal
Horizontal : 376.32mm
Vertical : 301.056mm
Operating Te mp: 5° to 50°C
Storage Temp.: -20° to 60°C
Operating Humidity :
37 Watts
CE, MPRII, FCC, cULus, TCO’99
4
19” LCD Color Monitor AOC 193P
Monitor Block Diagram
HOST Computer
Power board
Main Board
Video signal, DDC
Key board
2. LCD Monitor Description
The LCD monitor will contain a main board, a power board and 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.
CCFL Drive.
Flat Panel and
CCFL backlight
(Include: adapter, inverter)
AC-IN
100V-240V
RS232 Connector
For white balance
adjustment in factory
mode
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19” LCD Color Monitor AOC 193P
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 Control Buttons
External Controls
1. Power Key 2. LED
3. MENU/ENTER 4. Contrast
5. Brightness 6. Auto Adjust Key/Exit
6
19” LCD Color Monitor AOC 193P
FRONT PANEL CONTROL
• 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 func tion when OSD is ON or Exit OSD
menu when in Brightnes s / Contr ast Adjust OSD status.
• Contrast:
Adjust contrast or function adjust.
• Brightness:
Adjust brightness 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 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.
Orange —Off mode.
OSD Lock Function: To lock the OSD, press and hold the MEN U button while the monitor is off and then press
power button to turn the monit or on. To un-lock the OSD - press and hold the MENU button while the m onitor is off
and then press power button to turn the monitor on.
NOTES
• Do not install the monitor in a loca tion near heat sour ces such as radiators or air ducts, or in a place subject to
direct sunlight, or excessive dust or mechanical vibration or shock.
• Save the original shipping carton and pack ing materia ls, as the y will come in han dy 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 ne w, periodically c lean it with a soft cloth. Stubborn stains m ay be removed with a
cloth lightly dam pened with a mild detergent solution. Never use strong s olvents such as thinner, benzene, or
abrasive cleaners, s ince t h ese wi ll damage the cabine t. As a s af ety precaution, alwa ys unp lug the monitor before
cleaning it.
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19” LCD Color Monitor AOC 193P
Main Menu
Main
Icon
3.3 Adjusting The Picture
1. Press the MENU-button t o activ ate the O SD win do w.
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 su b-menu, press ◄ or ► again to navigate thr ough 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.
Adjusting the Picture
The descriptions for function control LEDS
Sub Menu
Item
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.
Sub Menu Icon Description
Item
Luminance
Image
Setup
Image
Position
Menu
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.
Color
Temp.
Input
Select
OSD Setup
sRGB N/A Recall sRGB Temperature from EEPROM.
User / Red
User / Green
User / Blue
Analog N/A Select input signal from analog source (D-Sub)
Digital N/A Select input signal from digital source (DVI)
H. Position
V. Position
Red Gain from Digital-register.
Green Gain Digital-register.
Blue Gain from Digital-register.
Adjust the horizontal position of the OSD.
Adjust the vertical position of the OSD.
8
19” LCD Color Monitor AOC 193P
Show the resolution, H/V frequency and input port of
Language
Information
Reset
Exit
OSD Timeout
Adjust the OSD timeout.
Language N/A Select the language you like.
Information N/A
current input timing.
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
9
19” LCD Color Monitor AOC 193P
1
5
6
10
11
15
4. Input/Output Specificati on
4.1 Input Signal Connector
Pin No.
Description Pin No. Description
1. Red 9. +5V
2. Green 10. Detect Cable
3. Blue 11. RXD
4. TXD 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
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 -
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19” LCD Color Monitor AOC 193P
Horizontal
Frequency
Vertical
Frequency
Dos-mode
720 × 400
31.47kHz
70.0Hz
4.2 Factory Preset Display Modes
Standard Resolution
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
XGA
SXGA
1024 × 768 56.476kHz 70.0Hz
1024 × 768 60.021kHz 75.0Hz
1280 × 1024 64.000kHz 60.0Hz
1280 × 1024 80.000kHz 75.0Hz
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19” LCD Color Monitor AOC 193P
4.3 Panel Specification
4.3.1 Features
4.3.2 Display Characteristics
12
19” LCD Color Monitor AOC 193P
4.3.3 Optical Characteristics
Electrical characteristics
13
19” LCD Color Monitor AOC 193P
Backlight unit
14
19” LCD Color Monitor AOC 193P
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N 6 4
3 9 14
11
13
Y
N
15
Y
N
16
17
19
Y
N
18
5. Block Diagram
5.1 Software Flow Chart
15
19” LCD Color Monitor AOC 193P
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?
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9) Save the power key status into EPROM.
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?
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?
6) Clear all global flags.
Turn on the LED and set it to green color.
Scalar initializes.
16) Display "No connection Check Signal Cable" message. And go into standby mode after the message
disappears.
16
19” LCD Color Monitor AOC 193P
Scalar IC TSU56AK
EEPROM
D-Sub
EEPROM
DB15_SDA,
EPR_SDA
LCD Interface
Crystal
Crystal
(X401)
DVI
EEPROM
DVI_SDA,
Digital Video
5.2 Electrical Block Diagram
5.2.1 Main Board
24MHz
(X601)
MCU
MTV512GMV
(U601)
(CN503)
(Include ADC, OSD)
(U401)
14.318MHz
EPR_SCL
M24C16
(U602)
Key Board Control
(CN602)
Signal
Connector
(CN302)
DVI_SCL
M24C02
(U302)
H sync
V sync
RGB
Connector
(CN301)
DB15_SCL
M24C02
(U301)
17
19” LCD Color Monitor AOC 193P
CN102
EMI filter
Bridge
Start Circuit: R903、R904
PWM
Over
Rectifier
AC input
PWM
Feedback
Circuit
Output
ON/OFF
DIM
Feedback
12V
U101
12V
5V
5.2.2 Inve rter/P ower Board
Lamp
Control IC
Circuit
Rectifier
and Filter
Transformer
Transformer
Voltage
Protect
MOSFET
Q203、Q204
PWM
Control IC
diodes
Circuit
ON/OFF Control
18
19” LCD Color Monitor AOC 193P
VLCD
VAA4
B2
4.SCALER
RIN
GIN
SOG
BIN
GNDR
GNDG
GNDB
HSYNC
VSYNC
R+
R-
G-
G+
B+
BCLK+
CLK-
CSZ
SCL
SDA
HW RE SET
INT
Volum e
AdjBAC KL ITE
PA[0.. 9]
PB[0.. 9]
VCC1.8
VCC3.3
VAA1
VAA2
VAA3
VAA4
AD0
AD1
AD2
AD3
VCC12V
VCC3.3
VCC1.8
B4
2. POWER
onPan el_5V/3. 3V
onBAC KLI TE
AdjBAC KL ITE
VCC3.3
VCC1.8
VAA1
VAA2
VAA3
VAA4
VCC5V
VCC12V
VLCD
VCPU
TOP B
TSU16/56AK FOR MYSON512 SWITCH
B
1 6W edne sda y , O ct ob er 0 6, 2 004
Title
Size Do c um ent N um ber Rev
Date: Sheet
of
B1
3.INPUT
RIN
GIN
BIN
VSYNC
GNDR
GNDG
GNDB
ST_DET1 HSYNC
SOGDDC_CLK
DDC_DAT
R+
R-
G-
G+
B+
BCLK+
CLK-
TXD
RXD
DDC_WP
DVI_DET
DDCC I_SEL
VAA1
VCPU
VLCD
VCPU
TSU16/5 6AK SCHEM ATIC
VCC5V
PB[0.. 9]
VCC3.3
B3
6.MCU
onBAC KLI TE
onPAN EL_ 5V/3 .3V
SDA
INT
CSZ
DDC_DAT
ST_DET1
SCL
HW RE SET
DDC_CLK
Volum e
VCC5V
VCC12V
VCPU
RXD
TXD
AD0
AD1
AD2
AD3
DDC_WPDVI_DET
DDCC I_SEL
VAA1
VAA3
B5
5.P ANEL INTERFACE
VLCD
PB[0.. 9]
PA[0.. 9]
VCC1.8
VAA4
VAA3
VCC5V
VCC12V
PA[0.. 9]
VAA2
VAA2
6. Schematic
6.1 Main Board
19
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