AOC 193P User manual

19” LCD Color Monitor AOC 193P
1
Service
Service
Service
Horizontal Frequency
30kHz – 83kHz
TABLE OF CONTENTS
Description Page Description Page
N
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
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
3.3 Adjusting the Picture...........................…............8
4. Input/Output Specification............……………............10
4.1 Input Signal Connector............……….…….................10
4.2 Factory Preset Display Modes.....................................11
4.3 Panel Specification.....………….…..…..…..................12
5. Block Diagram……...................…………................15
5.1 Software Flow Chart……………….…………....….......15
5.2 Electrical Block Diagram….………………….....…...17
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
7.4 Key Board………………….......................................33
8. Maintainability……….......................................34
8.1 Equipments and Tools Requirement……..............34
8.2 Trouble Shooting…….………..............................34
9. White-Balance, Luminance adjustment.............40
10. Monitor Exploded View……….…...…………............41
11. BOM List……….....................................................42
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

19” LCD Color Monitor AOC 193P
2
Revision List
Revision Date Revision History TPV Model
A00 Aug-29-06 Initial Release T94AM2HCBMPUNP
T980KA2HCSION

19” LCD Color Monitor AOC 193P
3
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 radiation exposure.
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 PARTS 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.)

19” LCD Color Monitor AOC 193P
4
1. Monitor Specifications
Driving system TFT Color LCD
LCD Panel Size 48cm(19")
Pixel pitch 0.294mm( H ) × 0.294mm( V )
Video R,G,B Analog Interface
Digital Interface
Input Separate Sync. H/V TTL
H-Frequency 30kHz – 83kHz
V-Frequency 55-75Hz
Display Colors 16.2M Colors
Dot Clock 135MHz
Max. Resolution 1280 × 1024 @75Hz
Plug & Play VESA DDC 2BTM
EPA ENERGY STAR®ON Mode ≤37W
OFF Mode ≤1W
Input Connector 15-pin D-Sub
DVI 24pin
Input Video Signal Analog:0.7Vp-p(standard),75 OHM, Positive
Digital signal
Maximum Screen Size Horizontal : 376.32mm
Vertical : 301.056mm
Power Source 100~240VAC,50~60Hz
Environmental
Considerations
Operating Temp: 5° to 50°C
Storage Temp.: -20° to 60°C
Operating Humidity :
10% to 85%
Dimension 406×407×214 (W ×H×D)mm
Weight (N. W.) 4.6kg Unit (net)
Power Consumption ( Maximum ) 37 Watts
Regulatory Compliance CE, MPRII, FCC, cULus, TCO’99

19” LCD Color Monitor AOC 193P
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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.
Monitor Block Diagram
HOST Computer
AC-IN
100V-240V
Power 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
Key board

19” LCD Color Monitor AOC 193P
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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 Control Buttons
External Controls
1. Power Key 2. LED
3. MENU/ENTER 4. Contrast
5. Brightness 6. Auto Adjust Key/Exit

19” LCD Color Monitor AOC 193P
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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 function when OSD is ON or Exit OSD
menu when in Brightness/ Contrast 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 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.
NOTES
•Do not install the monitor in a location near heat sources 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 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.

19” LCD Color Monitor AOC 193P
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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.
Adjusting the Picture
The descriptions for function control LEDS
Main Menu
Item
Main
Menu
Icon
Sub Menu
Item Sub Menu Icon Description
Luminance
Contrast
Contrast from Digital-register.
Brightness
Backlight Adjustment
Image
Setup
Focus
Adjust Picture Phase to reduce Horizontal-Line noise
Clock
Adjust picture Clock to reduce Vertical-Line noise.
Image
Position
H. Position
Adjust the horizontal position of the picture.
V. Position
Adjust the vertical position of the picture.
Color
Temp.
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.
User / Blue
Blue Gain from Digital-register.
Input
Select
Analog N/A Select input signal from analog source (D-Sub)
Digital N/A Select input signal from digital source (DVI)
OSD Setup
H. Position
Adjust the horizontal position of the OSD.
V. Position
Adjust the vertical position of the OSD.

19” LCD Color Monitor AOC 193P
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OSD Timeout
Adjust the OSD timeout.
Language
Language N/A Select the language you like.
Information Information N/A
Show the resolution, H/V frequency and input port of
current input timing.
Reset
Yes N/A Clear each old status of Auto-configuration.
No N/A Do not execute reset, return to main menu.
Exit
N/A N/A Exit OSD

19” LCD Color Monitor AOC 193P
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4. Input/Output Specification
4.1 Input Signal Connector
1
5
6
10
11
15
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 -

19” LCD Color Monitor AOC 193P
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4.2 Factory Preset Display Modes
Standard Resolution
Horizontal
Frequency
Vertical
Frequency
Dos-mode
720 × 400
31.47kHz
70.0Hz
VGA 640 × 480 31.47kHz 60.0Hz
640 × 480 37.50kHz 75.0Hz
SVGA 800 × 600 37.879kHz 60.0Hz
800 × 600 46.875kHz 75.0Hz
XGA
1024 × 768 48.363kHz 60.0Hz
1024 × 768 56.476kHz 70.0Hz
1024 × 768 60.021kHz 75.0Hz
SXGA 1280 × 1024 64.000kHz 60.0Hz
1280 × 1024 80.000kHz 75.0Hz

19” LCD Color Monitor AOC 193P
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4.3 Panel Specification
4.3.1 Features
4.3.2 Display Characteristics

19” LCD Color Monitor AOC 193P
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4.3.3 Optical Characteristics
Electrical characteristics

19” LCD Color Monitor AOC 193P
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Backlight unit

19” LCD Color Monitor AOC 193P
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5. Block Diagram
5.1 Software Flow 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

19” LCD Color Monitor AOC 193P
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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 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
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?

19” LCD Color Monitor AOC 193P
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5.2 Electrical Block Diagram
5.2.1 Main Board
MCU
MTV512GMV
(U601)
Scalar IC TSU56AK
(Include ADC, OSD)
(U401)
EEPROM
M24C16
(U602)
D-Sub
Connector
(CN301)
EEPROM
M24C02
(U301)
H sync
V sync
RGB
DB15_SDA,
DB15_SCL
EPR_SDA
EPR_SCL
LCD Interface
(CN503)
Key Board Control
(CN602)
Crystal
24MHz
(X601)
Crystal
14.318MHz
(X401)
DVI
Connector
(CN302)
EEPROM
M24C02
(U302)
DVI_SDA,
DVI_SCL
Digital Video
Signal

19” LCD Color Monitor AOC 193P
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5.2.2 Inverter/Power Board
CN102
EMI filter
Bridge
Rectifier
and Filter
Start Circuit: R903
、
R904
PWM
Control IC
Transformer
Over
Voltage
Protect
Rectifier
diodes
AC input
ON/OFF Control
PWM
Control IC
Feedback
Circuit
Output
Circuit Transformer MOSFET
Q203、Q204
Lamp
ON/OFF
DIM
PWM
Feedback
Circuit
12V
U101
12V
5V

19” LCD Color Monitor AOC 193P
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6. Schematic
6.1 Main Board
VLCD
VAA4
B2
4.SCALER
RIN
GIN
SOG
BIN
GNDR
GNDG
GNDB
HSYNC
VSYNC
R+
R-
G-
G+
B+
B-
CLK+
CLK-
CSZ
SCL
SDA
HW RESET
INT
Volum e
AdjBAC KLITE
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
onPanel_5V/3. 3V
onBAC KLITE
AdjBAC KLITE
VCC3.3
VCC1.8
VAA1
VAA2
VAA3
VAA4
VCC5V
VCC12V
VLCD
VCPU
TOP B
TSU16/56AK FOR MYSON512 SWITCH
B
1 6Wednesday , October 06, 2004
Title
Size Docum ent Number 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+
B-
CLK+
CLK-
TXD
RXD
DDC_WP
DVI_DET
DDCCI_SEL
VAA1
VCPU
VLCD
VCPU
TSU16/56AK SCHEMATIC
VCC5V
PB[0.. 9]
VCC3.3
B3
6.MCU
onBAC KLITE
onPAN EL_5V/3.3V
SDA
INT
CSZ
DDC_DAT
ST_DET1
SCL
HW RESET
DDC_CLK
Volum e
VCC5V
VCC12V
VCPU
RXD
TXD
AD0
AD1
AD2
AD3
DDC_WPDVI_DET
DDCCI_SEL
VAA1
VAA3
B5
5.PANEL INTERFACE
VLCD
PB[0.. 9]
PA[0.. 9]
VCC1.8
VAA4
VAA3
VCC5V
VCC12V
PA[0.. 9]
VAA2
VAA2

19” LCD Color Monitor AOC 193P
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VCPU
VAA4 4
GND
Brightness
VAA4
U202
AIC1084-33M
3
1
2
VIN
ADJ
VOUT
VAA2 4
VCC5V
VCC3.3
GND
C216
0.1uF
R202
10K£[ 1/16W
VCC5V
GND C201
0.1uF
H4
SCREW3.2RM
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
U201
AZ1117D-1.8
32
1
VI VO
GND
R207 4.7K£[ 1/16W
GND
+
C202
220uF/25V
VCC12V 6
VAA1 4
2004/09/05 ADD
TOUCH PANEL
POWER
VCC3.3
R209
0£[ 1/16W
R210
NC
Q203
AO3401
onBACKLITE 6
VCC5V
VCC5V 3,4,6
VLCD
H2
SCREW3.2RM
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
C212
0.1uF
VCC5V
VAA3 4
+
C215
47uF/16V
C219
0.1uF/16V
R205 4.7K£[ 1/16W VCC3.3 4
VCC1.8
R201 4.7K£[ 1/16W
+C204
220uF/25V
POWER B
TSU16AK
B
2 6Wednesday , October 06, 2004
Title
Size Document Number Rev
Date: Sheet of
VAA2
VCPU
VCPU 6
VCC5V
C210
0.1uF
VCC5V+
C
B E
C206
1uF/25V
VCC5V+
+
C218
47uF/25V
VCC12V
R215
51K£[ 1/16W
R214
NC
DIM
PITCH 2.0
CN201
CONN
2
4
6
8
10
12
1
3
5
7
9
11
VCC5V
VCC1.8 4
CN202
CONN
1
2
C205
0.1uF
VCC12V
+C208
10uF/16V
VAA3
FB202
600 OHM
R208
10K£[ 1/16W
Q202
PMBS3904
CE
B
H1
SCREW3.2RM
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
VLCD 5
FB201
NC
D202
GS1D
GND
onPanel_5V/3.3V6
VAA1
VCC5V
R212 4.7K£[ 1/16W
VCC5V
R203
1K£[ 1/16W
R211
10K£[ 1/16W
SOT-252
R213
NC
C217
0.1uF
Q201
PMBS3904
CE
B
C203
0.1uF
VCC12V
C
B E
Q204
PMBS3904
C
E
B
+
C211
47uF/16V
C214
0.1uF
GND
AdjBACKLITE
D201 SS14
C207
0.1uF
GND
ON_OFF
R204
10K£[ 1/16W
VCC5V+
VCC12V
TO-263
VCC5V
VCC12V
R206
10K£[ 1/16W
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