AOC TS185LBE User manual

18.5"LCD Monitor AOC TS185LBE
1
Service
Service
Service
HorizontalFrequency
30-83kHz
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 Instructions....................................…...........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.Panel Specification......……..……………..................11
5. Block Diagram….........................................................20
5.1 Main Board……………………………………….…….20
5.2.Power Board……………………………………….......21
6.Schematic……………..............................................23
6.1.Main Board....……….............................................23
6.2.Power Board………………………………………....31
6.3.Key Board…………………...….……………………35
7.PCB Layout..………….............................................36
7.1.Main Board……….................................................36
7.2.Power Board.….....................................................42
7.3.Key Board…..........................................................45
8.Maintainability………...............................................46
8.1.Equipments and Tools Requirement......................46
8.2.Trouble Shooting………........................................47
9.White-Balance,Luminance Adjustment….……..…...51
10.Monitor Exploded View…………….……….…........53
11.BOM List…............................................................55
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

2
Revision List
Version Release Date Revision History TPV Model Name
A00 Oct.22.2012 Initial release
T8CWHF2EX81UNN
T8BKHF2EX81UN6
T8C2HF2EX81UNN

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.)

4
1. Monitor Specification
LCD Panel
Driving system 18.5”W LCD Monitor with LED Backlight
Size 47.0cm
Pixel pitch 0.3mm( H ) x 0.3mm( V )
Input
Video R,G,B Analog Interface
H-Frequency 30KHz – 83KHz
V-Frequency 55-75Hz
Display Colors 16.7M Colors
Dot Clock 85.5MHz
Max. Resolution 1366 x 768 @60Hz
Plug & Play VESA DDC1/2BTM
Input Connector D-Sub 15pin
Input Video Signal Analog:0.7Vp-p(standard),
75 OHM, Positive
Maximum Screen Size Horizontal : 409.8mm
Vertical : 230.4mm
Power Source 100-240V,50/60Hz,1.5A
Environmental
Considerations
Operating Temp: 0° to 40°C
Storage Temp.: -25° to 55°C
Operating Humidity: 10% to 85%
Weight (N. W.) 2.7 kg Unit (net)
Dimension 440mm x 341mm x 180mm
Power Consumption ( Maximum ) 20 Watts
External Controls:
Switch
Auto Adjust button / Exit
-/ ECO
+ / Image Ratio
Menu / Enter
Power Button
Functions
Luminance
Image Setup
Color Temp.
Color Boost
Picture Boost
OSD Setup
Extra
Regulatory Compliance FCC, CE

5
2. LCD Monitor Description
The LCD Monitor will contain a main board, an adapter board and a key board which house the flat panel control
logic,brightnesscontrollogicandDDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage.
Video signal, DDC
Power Board
Flat Panel and
LED backlight
Main Board RS232 Connector
For white balance
adjustment in
factory mode
HOST Computer
LED Drive
AC-IN
100V~240V
Monitor Block Diagram
Key board

6
3. Operation 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 (See
Figure 4). 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 VGA card.
Press the power button to turn on the monitor position. The power indicator will light up.
3.2 Control Buttons
Figure 4 External Control Button
EXTERNAL CONTROLS
1. Auto Adjust button / Exit
2. -/ ECO
3. +/ Image Ratio
4. MENU / ENTER
5. Power Button
FRONT PANEL CONTROL
•/ Power Button:
Press this button to turn the monitor ON or OFF, and display the monitor’s state.
• Power Indicator:
Blue - Power On mode.
Orange - Off mode.
• MENU / ENTER:
Activate OSD menu when OSD is OFF or activate/de-activate sub-menu function when OSD is ON.
• - / ECO:
Activates the ECO control when the OSD is off or adjust a function when function is activated.

7
• + /Image Ratio:
Activates the Image Ratio control when the OSD is OFF or navigate through adjustment icons when OSD is ON or
adjust a function when function is activated.
• 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 to activate the Auto Adjustment function.
The Auto Adjustment function is used to set the HPos, VPos, Clock and Phase.
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.
• Do not scratch the screen with hard things, it may cause permanent damage.
• Don’t leak liquid into monitor which will result in the damage of component.

8
3.3 Adjusting the Picture
HOW TO ADJUST A SETTING
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.
Figure5theOSDMessage
ADJUSTING THE PICTURE
The descriptions for function control
Main Menu
Item
Main Menu
Icon
Sub Menu
Item
Sub
Menu Description
Luminance
Contrast Contrast from Digital-register
Brightness Backlight Adjustment
Eco Mode
Standard Standard Mode
Text Text Mode
Internet Internet Mode
Game Game Mode
Movie Movie Mode
Sports Sports Mode
DCR
Off Disable dynamic contrast ratio
On Enable dynamic contrast ratio

9
Image Setup
Clock Adjust Picture Clock to reduce Vertical-Line noise
Phase Adjust Picture Phase to reduce Horizontal-Line noise
H.Position Adjust the horizontal position of the picture
V.Position Adjust the vertical position of the picture
Image Ratio Wide/4:3
Color Temp.
Warm Recall Warm Color Temperature from EEPROM
Normal Recall Normal Color Temperature from EEPROM
Cool Recall Cool Color Temperature from EEPROM
sRGB Recall SRGB Color Temperature from EEPROM
User
User-B Blue Gain from Digital-register
User-G Green Gain Digital-register
User-R Red 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 Adjust Frame Size
Brightness Adjust Frame Brightness
Contrast Adjust Frame Contrast
H.Position Adjust the horizontal position of Frame
V.Position Adjust the vertical position of Frame
Bright Frame on or off Disable or Enable Bright Frame
OSD Setup
H.Position Adjust the horizontal position of OSD
V.Position Adjust the vertical position of OSD
Timeout Adjust the OSD Timeout
Language Select the OSD language
Extra
DDC/CI Turn ON/OFF DDC/CI Support
Reset Reset the menu to default
Information Show the information of the main image and sub-image source

10
4. Input/Output Specification
4.1 Input Signal Connector
D-Sub 15pin Connector
15-Pin Color Display Signal Cable
PIN NO. DESCRIPTION PI N NO. DESCRIPTION
1. Red 9. +5V/Sense(+5V)
2. Green 10. Monitor Gnd
3. Blue 11. Logic Gnd
4. Logic Gnd 12. DDC Serial Data
5. Detect cable 13. H-Sync
6. Red Gnd 14. V-Sync
7. Green Gnd 15. DDC Serial Clock
8. Blue Gnd
4.2 Factory Preset Display Modes
STANDARD RESOLUTION HORIZONTAL
FREQUENCY(KHz)
VERTICAL
FREQUENCY(Hz)
VGA
640×480 @60Hz 31.469 59.940
640×480 @72Hz 37.861 72.809
640×480 @75Hz 37.500 75.000
Dos-mode 720×400 @70Hz 31.469 70.087
SVGA
800×600 @56Hz 35.156 56.250
800×600 @60Hz 37.879 60.317
800×600 @72Hz 48.077 72.188
800×600 @75Hz 46.875 75.000
XGA
1024×768 @60Hz 48.363 60.004
1024×768 @70Hz 56.476 70.069
1024×768 @75Hz 60.023 75.029
WXGA 1366x768 @60HZ 47.765 59.85

11
4.3. Panel Specification
4.3.1 TPM185B1-WX3400:
4.3.1.1 Overview
The TPM185B1-WX3400 Rev: 3550 model is a 18.5 inch wide TFT-LCD module with LED Backlight Unit and
30-pin 1ch-LVDS interface. This module supports 1366 x 768 WXGA (16:9 wide screen) mode and displays up to
16.7 million colors. The converter module for the Backlight Unit is not built in.
4.3.1.2 Features
- Contrast ratio 1000:1
- Response time 5ms.
- Brightness 200nits (typ.)
- WXGA (1366 x 768 pixels) resolution.
- DE (Data Enable) only mode.
- LVDS (Low Voltage Differential Signaling) interface.
- ROHS compliance.
4.3.1.3 GENERAL SPECIFICATI0NS
4.3.1.4 MECHANICAL SPECIFICATIONS
Note (1) Please refer to sec. 3.1 & 3.2 in this document for more information of power consumption
Note (2) Please refer to the attached drawings for more information of front and back outline dimensions.

12
4.3.1.5 ELECTRICAL CHARACTERISTICS
Ta = 25 ± 2 ºC
4.3.1.6 BACKLIGHT UNIT
Parameter guideline for LED driving is under stable conditions at 25 (Room Temperature):℃
4.3.1.7 BLOCK DIAGRAM

13
4.3.1.8 OPTICAL CHARACTERISTICS
TEST CONDITIONS
OPTICAL SPECIFICATIONS

14
4.3.2 HM185WX1-400:
4.3.2.1 Overview
HM185WX1-400 is a color active matrix TFT LCD module using amorphous silicon TFT's (Thin Film Transistors) as
an active switching devices. This module has a 18.5 inch diagonally measured active area with WXGA resolutions
(1366 horizontal by 768 vertical pixel array). Each pixel is divided into RED, GREEN, BLUE dots which are arranged
in vertical stripe and this module can display 16.7M colors. The TFT-LCD panel used for this module is adapted for a
low reflection and higher color type.
4.3.2.2 Features
- LVDS Interface with 1 pixel / clock
- High-speed response
- Low power consumption
- 6-bit (Hi-FRC) color depth, display 16. 7M colors
- Incorporated edge type back-light (One Light Bar)
- High luminance and contrast ratio, low reflection and normal viewing angle
- DE (Data Enable) only
- RoHS
4.3.2.3 GENERAL SPECIFICATI0NS
The followings are general specifications at the model HM185WX1-400.

15
4.3.2.4 MECHANICAL CHARACTERISTICS
4.3.2.5 ELECTRICAL SPECIFICATIONS
[Ta =25±2 ℃]

16
4.3.2.6 BLOCK DIAGRAM
4.3.2.7 OPTICAL SPECIFICATION
[VDD = 5.0V, Frame rate = 60Hz, Clock = 78MHz, IBL = 7.5mA, Ta =25±2 ℃]

17
4.3.3 TPM185B1-BGEL03:
4.3.3.1 OVERVIEW
M185BGE-L22 is a 18.5” TFT Liquid Crystal Display module with WLED Backlight unit and 30 pins 1ch-LVDS
interface. This module supports 1366 x 768 HD mode and can display up to 16.7M colors. The converter module for
Backlight is not built in.
4.3.3.2 FEATURES
- Contrast ratio 700:1
- Response time 5ms.
- Brightness 200nits (Typ.)
- Color saturation NTSC 72%.
- WXGA (1366 x 768 pixels) resolution.
- LVDS (Low Voltage Differential Signaling) interface.
- RoHS compliance.
4.3.3.3 GENERAL SPECIFICATI0NS
Note (1) The specified power consumption: Total= cell (reference 4.3.1)+BL (reference 4.3.3)

18
4.3.3.4 MECHANICAL SPECIFICATIONS
Note (1) Please refer to the attached drawings for more information of front and back outline dimensions.
Note (2) () is mean dimension with mylar.
4.3.3.5 FUNCTION BLOCK DIAGRAM
4.3.3.6 BACKLIGHT UNIT (LED matrix is 11S4P):
Parameter guideline for LED driving is under stable conditions at 25 (Room Temperature):℃

19
4.3.3.7 LCD ELETRONICS SPECIFICATION
4.3.3.8 OPTICAL CHARACTERISTICS
TEST CONDITIONS
OPTICAL SPECIFICATIONS

20
5. Block Diagram
5.1 Main board
Key Control
interface
(CN408)
LCD Interface
(CN405)
Scalar IC HX6820-A080LAG
(Include MCU, ADC, OSD)
(U401)
EEPROM
MX25L2026DM1I-12G
(U402)
Crystal
24.576MHZ
(X401)
EEROM
M24C02-RMN6TP
(U101)
D-SUB
Connector
(CN101)
EDID_WP
VGA-SCL
VGA-SDA
H sync
V sync
RGB