AOC 719Sa+ User manual

17"LCDColorMonitor AOC719Sa+
Service
Service
Service
Horizontal Frequency
31-80 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
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.OSD Menu…………….…...........................…............7
4.Input/Output Specification............……………............11
4.1.Input Signal Connector............………….................11
4.2.Power Supply Requirements...............................12
4.3.Factory Preset Display Modes……..........................12
4.4.Panel Specification.....………...…………..................13
5.Block Diagram…..….....................…………................20
5.1.Main Board…………………….……………....….......20
5.2.Power Board………………...…………..….......21
6.Schematic……………......................................22
6.1.Main Board………..........................................22
6.2.Power Board...……....................................27
6.3.Key Board...……..........................................33
7.PCB Layout..………….......................................34
7.1.Main Board………........................................34
7.2.Power Board…............................................36
7.3.Key Board…………….....................................42
8.Maintainability……….......................................43
8.1.Equipments and Tools Requirement...............43
8.2.Trouble Shooting…………..............................44
9.White-Balance, Luminance Adjustment.............48
10.Monitor Exploded View………..…….…............50
11.BOM List…………………………………............52
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

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Revision List
Version Release Date Revision History TPV Model Name
A00 Mar.01, 2010 Initial release
T79ARDDBK1K3AN
T79CRDDBK1K2AN
T79SRDDBK1K2AN
A01 Apr.28.2010 Add new model T79ARDDBK1K3AC
A02 Nov.25.2010 Add new model T79SRDDBK1K2AN
A03 Mar.31.2011 Add new model T79CRDDEKMSPAN
A04 Dec.9.2011 Add new model T79CRDDEKMACAN

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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 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.)

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1. Monitor Specifications
LCD Panel
Model number 719Sa+
Driving system TFT Color LCD
Viewable Image 43.3cm diagoanl
Pixel pitch 0.264mm(H) x 0.264mm(V)
Video R, G, B Analog lnterface
Separate Sync. H/V TTL
Display Color 16.7M Colors
Dot Clock 135 MHz
Resolution
Horizontal scan 31 kHz - 80 kHz
Horizontal scan 337.920mm
Vertical scan range 56 Hz - 75 Hz
Vertical scan 270.336mm
Optimal preset 1280 x 1024 (60 Hz)
Highest preset 1280 x 1024 (75 Hz)
Plug & Play VESA DDC2B/CI
Input Connector D-Sub 15pin
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM
Power Source 100~240VAC, 50/60Hz
Power
Consumption
Active < 37 W(T79ARDDBK1K3AN&T79SRDDBK1K2AN)
Active < 23 W(T79CRDDBK1K2AN)
Standby < 1 W
Speakers 1W X 2
Physical
Characteristics
Connector Type 15-pin Mini D-Sub
Signal Cable Type Detachable
Dimensions &
Wei
g
ht:
Height (with base) 382.6 mm
Width 371.6 mm
Depth 190 mm
Weight (monitor 3.6 kg
Weight (with 5.41 kg
Environmental
Temperature:
Operating 0° to 40°
Non-Operating -20°to 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 )

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2. LCD Monitor Description
The LCD monitor will contain a main board, a power 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.
Monitor Block Diagram
HOST Computer
AC-IN
100V-240V
Power board
(Include: adapter, inverter, audio)
Flat Panel and
CCFL backlight
Main Board
RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
Video signal, DDC
Key board

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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 knobs 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.
* Press the power button to turn on the monitor. The power indicator will light up.
3.2 Control Buttons
1. Auto / Exit
2. Eco mode / -
3. Volume / +
4. Menu / Enter
5. Power Button & Indicator

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3.3 OSD Menu
OSD Settings
•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.
•Eco Mode hot key: Press the Eco key continuously to select the Eco mode of brightness when there is no
OSD (Eco mode hot key may not be available in all models).
•Volume adjustment hot key: When there is no OSD, press Volume (+) to active volume adjustment bar,
press - or + to adjust volume (Only for the models with speakers).
•Auto configure hot key: When the OSD is closed, press Auto button continuously about 2 second to do auto
configure.

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Function Control Illustration
Luminance Adjust Range Description
Brightness 0-100 Backlight Adjustment
Contrast 0-100 Contrast from Digital-register.
Eco mode
Standard
Standard Mode
Text
Text Mode
Internet
Internet Mode
Game
Game Mode
Movie
Movie Mode
Sports
Sports Mode
Gamma
Gamma1 Adjust to Gamma1
Gamma2 Adjust to Gamma 2
Gamma3 Adjust to Gamma 3
DCR
Off
Disable dynamic contrast ratio
On
Enable dynamic contrast ratio
Image Setup
Clock 0-100 Adjust picture Clock to reduce
Vertical-Line noise.
Phase 0-100 Adjust Picture Phase to reduce
Horizontal-Line noise
H.Position 0-100 Adjust the vertical position of the

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picture.
V.Position 0-100 Adjust the horizontal position of
the picture.
Color Temp.
Warm
6500K
Recall Warm Color Temperature
from EEPROM.
Normal
7300K
Recall Normal Color
Temperature from EEPROM.
Cool
9300K
Recall Cool Color Temperature
from EEPROM.
sRGB
Recall SRGB Color Temperature
from EEPROM.
User
Red Red Gain from Digital-register
Green Green Gain Digital-register.
Blue Blue Gain from Digital-register
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
H. position Adjust Frame horizontal Position
V.position Adjust Frame vertical Position
Bright Frame on or off Disable or Enable Bright Frame

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OSD Setup
H.Position 0-100 Adjust the vertical position of
OSD
V.Position 0-100 Adjust the horizontal position of
OSD
Timeout 5-120 Adjust the OSD Timeout
Transparence 0-100 Adjust the transparence of OSD
Language Select the OSD language
Extra
Input Select
Auto Select to Auto Detect input signal
Analog Select Analog Sigal Source as
Input
Digital Select Digital Sigal Source as
Input
Auto Config yes or no
A
uto adjust the picture to default
Image Ratio wide or 4:3 Select wide or 4:3 format for
display
DDC-CI yes or no Turn ON/OFF DDC-CI Support
Off Timer 0~24hours Select timing to turn off the
monitor.
Information
Show the information of the main
image and sub-image source
Reset
Reset yes or no Reset the menu to default
Exit
Exit Exit the main OSD

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4. Input/Output Specification
4.1 Input Signal Connector
Analog connectors
Pin Numbe
r
15-Pin Side of the Si
g
nal Cable
1 Video-Red
2 Video-Green
3 Video-Blue
4 N.C.
5 Detect Cable
6 GND-R
7 GND-G
8 GND-B
9 +5V
10 Ground
11 N.C.
12 DDC-Serial data
13 H-sync
14 V-sync
15 DDC-Serial clock

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4.2 Power Supply Requirements
A/C Line voltage range : 100 V ~ 240 V
A/C Line frequency range : 50 ±3Hz, 60 ±3Hz
Current : 1.5A max at 100V ; 0.8A max at 240 V
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
4.3 Factory Preset Display Modes
Stand Resolution Horizontal Frequency(kHz) Vertical Frequency(Hz)
Dos-mode 720 x 400 31.469 70
VGA
640 x 480 31.469 60
640 x 480 35 67
640 x 480 37.861 72
640 x 480 37.5 75
SVGA
800 x 600 35.156 56
800 x 600 37.879 60
800 x 600 48.077 72
800 x 600 46.875 75
832 x 624 49.725 75
XGA
1024 x 768 48.363 60
1024 x 768 56.476 70
1024 x 768 60.023 75
SXGA
1280 x 1024 63.981 60
1280 x 1024 79.976 75

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4.4 Panel Specification
4.4.1 General Features
T79ARDDBK1K3AN
This specification applies to the 17 inch Color TFT-LCD Module M170EG01 VD.The display supports the SXGA+
(1280(H) x 1024(V)) screen format and 16.2M colors (RGB 6-bits+ RFC data).All input signals are 2 Channel LVDS
interface compatible. This module does not contain an inverter card for backlight.
T79CRDDBK1K2AN
CLAA170EA10 is 17.0” color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD panel,
driver ICs, control circuit and backlight. By applying 8 bit digital data(6 bit+Hi-FRC),1280×1024, 16.7M-color images
are displayed on the 17.0” diagonal screen. Input power voltage is 5.0V for LCD driving. Inverter for backlight is not
included in this module.
T79SRDDBK1K2AN
LTM170EU-L31 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film
Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light
unit. The resolution of a 17.0“ is 1280 x 1024 and this model can display up to 16.7 millions colors.
4.4.2 Display Characteristics
T79ARDDBK1K3AN

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T79CRDDBK1K2AN
T79SRDDBK1K2AN

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4.4.3 Electrical Characteristics
T79ARDDBK1K3AN
Backlight
T79CRDDBK1K2AN
(1)TFT-LCD
Ta=25℃

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(2)Backlight
T79SRDDBK1K2AN
(1) TFT LCD Module
Ta = 25°C

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(2)Back Light Unit
Ta=25 ± 2°C
4.4.4 Optical Characteristics
T79ARDDBK1K3AN
The optical characteristics are measured under stable conditions at 25℃(Room Temperature):

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T79CRDDBK1K2AN
Ta=25℃, VCC=5.0V

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T79SRDDBK1K2AN
(Ta = 25 ± 2°C, VDD=5V, fv= 60Hz, fDCLK=54MHz, IL = 6.5mArms)

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5. Block Diagram
5.1 Main Board
Scalar IC RTD2025L
(Include ADC, OSD)
(U501)
H sync
V sync
RGB
EPR_SDA
EPR_SCL
LCD Interface
(CN601)
Crystal 24MHz
(X401)
MCU
RTD2120L-LF
(U401)
DDC1_SCL
DDC1_SDA D-Sub Connector
(
CN301
)
EEPROM
AF24BC16
(U403)
Key Control
Interface
(CN202)