AOC LM960S User manual
19” LCD Color Monitor AOC LM960s
1
Service
Service
Service
Horizontal Frequency
30 KHz-83 KHz
TABLE OF CONTENTS
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
Important Safety Notice.………….…..................……......2
Revision List.…........................………................……......3
1.Product Feature..............................………........4
2.LCD Monitor Description…………………………….......5
3.Operation Instruction…………...............……...........6
3.1 General Instructions.......................................…...........6
3.2 Control Buttons………..…….…..............……...............6
3.3 Adjusting the Picture...........................…............8
4.Input/Output Specification............……………............10
4.1 Input Signal Connector......….…..……........…….........10
4.2 Factory Preset Display Modes...............…...............10
4.3 Power Supply Requirement…………………………....11
4.4 Panel Specification..............………………..................12
5. Block Diagram…….…...................…………................16
5.1 Software Flow Chart………………….………....….......16
5.2 Electrical Block Diagram……….………..…..….......18
6.Schematic……………..................................….....20
6.1 Main Board..............................................................20
6.2 Power Board....…………..........……........................26
7.PCB Layout..…………...........……...........................29
7.1 Main Board………..................……....................29
7.2 Power Board…....................……………..................32
7.3 Key Board……….....…….............……….................34
8.Maintainability………............................……….........35
8.1 Equipments and Tools Requirement......……….......35
8.2 Trouble Shooting………………..............................35
9.White-Balance, Luminance adjustment.............41
10. Monitor Exploded View……...………………............42
11.BOM List….................……......................….............43
12.Different Parts List...……..........................................57
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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19” LCD Color Monitor AOC LM960s
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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 might 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.)
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19” LCD Color Monitor AOC LM960s
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1. Monitor Specifications
Drivingsystem TFTColorLCD
Size 48cm(19")
LCD Panel
Pixel pitch 0.294mm( H ) × 0.294mm( V )
Video R,G,B Analog Interface
Separate Sync. H/V TTL
H-Frequency 30kHz – 83kHz
Input
V-Frequency 55-75Hz
Display Colors 16.2M Colors
Dot Clock 135MHz
Max. Resolution 1280 × 1024 @75Hz
Plug & Play VESA DDC2BTM
ON Mode <37W
EPA ENERGY STAR®
OFF Mode ≤1W
Input Connector 15-pin D-Sub
Input Video Signal Analog:0.7Vp-p(standard),
75 OHM, Positive
Maximum Screen Size Horizontal : 376.32mm
Vertical : 301.056mm
Power Source 100~240VAC,47~63Hz
Environmental
Considerations
Operating Temp: 5° to 50°C
Storage Temp.: -20° to 60°C
Operating Humidity: 10% to 85%
Dimension 423(W)×429(H)×215(D)mm
Weight (N. W.) 4.9kg Unit (net)
Power Consumption 37 Watts( Maximum )
Regulatory Compliance CE, FCC, cULus, ISO13406-2, TCO’03
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2. LCD Monitor Description
The LCD monitor will contain a main board, a power board, a key 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.
Monitor Block Diagram
AC-IN
100V-240V
Power Board
Flat Panel and
CCFL Backlight
Main Board
Key board
RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
CCFL Drive.
Video signal, DDC
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19” LCD Color Monitor AOC LM960s
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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
1. MENU / ENTER 2. / Contrast
3. Power Button/ LED 4. / Brightness
5. Auto Adjust button / Exit
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FRONT PANEL CONTROL
•Power Button:
Press this button to turn the monitor ON or OFF.
•Power Indicator:
Green — 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 Brightness/ Contrast Adjust OSD status.
•Brightness / :
Adjust brightness or function adjust.
•Contrast / :
Adjust contrast 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 for 2 seconds to activate the Auto Adjustment function.
The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
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.
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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 descriptions for function control LEDS
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 noiseImage 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 from EEPROM.
Cool N/A Recall Cool 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.
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Main
Menu
Item
Main Menu Icon Sub
Menu
Item
Sub Menu Icon Description
Yes
N/A Auto Adjust the H/V
Position, Focus and Clock of
picture.
Auto Config
No N/A Do not execute Auto Config,
return to main menu.
H. Position
A
djust 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
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4. Input/Output Specification
4.1 Input Signal Connector
Pin No. Description Pin No. Description
1. Red 9. +5V
2. Green 10. Detect Cable
3. Blue 11. TXD
4. RXD 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
VGA connector layout
15
610
11 15
4.2 Factory Preset Display Modes
Standard Resolution
Horizontal
Frequency
Vertical
Frequency
Dos-mode 720 x 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
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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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19”LCD Color Monitor AOC LM960s
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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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19”LCD Color Monitor AOC LM960s
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5.2 Electrical Block Diagram
5.2.1 Main Board
MCU
W78E065
(U601)
Scalar IC TSU16AK
(Include ADC, OSD)
(U401)
EEPROM
M24C16
(U602)
EEPROM
M24C02
(U301)
H sync
V sync
RGB
DB15_SDA
DB15_SCL
EPR_SDA
EPR_SCL
LCD Interface
(CN503)
Key Board
Control
D-Sub
Connector
(CN301)
Crystal
14.318MHZ
(X401)
Crystal
20MHZ
(X601)
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19”LCD Color Monitor AOC LM960s
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5.2.2 Power Board
CN902
EMI filter
Bridge
Rectifier
and Filter
Start Circuit
PWM
Control IC
Transformer
Over
Voltage
Protect
Rectifier
diodes
AC input
ON/OFF Control
Feedback
Circuit
Output
Circuit
Transformer
Lamp
ON/OFF
DIM
Feedback
Circuit 12V
5
V
IC101
MOSFET
PWM
Control IC
12V
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6. Schematic
6.1 Main Board
VAA1
B1
3.INPUT
RIN
GIN
BIN
VSYNC
GNDR
GNDG
GNDB
ST_DET1 HSYNC
SOGDDC_CLK
DDC_DAT
ST_DET2
R+
R-
G-
G+
B+
B-
CLK+
CLK-
TXD
RXD
PA[0..9]
VAA2
VLCD
TSU16AK SCHEMATIC
VCC2.5
VCC5V
VCC12V
VCPU VCC12V
VAA4
VAA3
VAA1
VAA3VCC2.5
VCC3.3
B3
6.MCU
onBACKLITE
ST_DET2
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
VCC5V
B5
5.PANEL INTERFACE
VLCD
PB[0..9]
PA[0..9]
VAA4
PB[0..9]
VLCD
B4
2.POWER
onPanel_5V/3.3V
onBACKLITE
AdjBACKLITE
VCC3.3
VCC2.5
VAA1
VAA2
VAA3
VAA4
VCC5V
VCC12V
VLCD
VCPU
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]
VCC2.5
VCC3.3
VAA1
VAA2
VAA3
VAA4
AD0
AD1
AD2
AD3
VCPU
VCC3.3
TOP
D
B
16Wednesday, April 14, 2004
Title
Size Document Number Rev
Date: Sheet of
VAA2
TSU16AK for AOC
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