22" LCD Color Monitor |
AOC 2212ph |
Service
Service
Service
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Horizontal Frequency |
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TABLE OF CONTENTS |
30kHz – 83kHz |
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Description |
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Description |
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Table Of Contents.......……..............................…........1 |
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5.2.Electrical Block Diagram……………..….......17 |
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Revision |
List.…........................................……......2 |
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6.Schematic…………......................................19 |
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Important |
Safety Notice.……..................……......3 |
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6.1 Main Board……..............................................19 |
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1.Monitor |
Specification..............................………........4 |
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6.2 Power Board....……....................................27 |
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2.LCD Monitor Description…………………………….......5 |
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7.PCB Layout..………….......................................29 |
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3.Operation |
Instruction…………...............……...........6 |
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7.1.Main Board………........................................29 |
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3.1.General |
Instructions...........................…...........6 |
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7.2 Power Board....……....................................30 |
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3.2.Control Button…………….…..............……...............6 |
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7.3.Key Board…………….....................................31 |
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3.3.OSD Menu…………….…...........................…............8 |
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8.Maintainability……….......................................32 |
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4.Input/Output Specification............……………............11 |
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8.1.Equipments and Tools Requirement...............32 |
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4.1.Input Signal Connector............…………................11 |
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8.2.Trouble Shooting…………..............................33 |
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4.2.Factory Preset Display Modes..........................12 |
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9.White-Balance, Luminance adjustment.............39 |
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4.3.Panel Specification.....………………..................13 |
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10.Monitor Explode View………..…….…............41 |
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5. Block Diagram…..…....................…………...............15 |
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11.BOM List…………………………………............43 |
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5.1.Software Flow Chart……..…………....….......15 |
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12. Different Parts List……………………………...65 |
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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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
1
22" LCD Color Monitor |
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AOC 2212ph |
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Revision List |
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Version |
Release Date |
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Revision History |
TPV Model Name |
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A00 |
Jul.-24-07 |
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Initial release |
TC6MM3DTWJWRDN |
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A01 |
Sep.-20-07 |
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ADD TPV MODEL IN ITEM 12 |
TC6MM3DLWJCKDN |
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2
22" LCD Color Monitor |
AOC 2212ph |
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.)
3
22" LCD Color Monitor |
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AOC 2212ph |
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1. Monitor Specifications |
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Driving system |
TFT Color LCD |
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LCD Panel |
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Size |
55.8cm(22") |
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Pixel Pitch |
0.282mm(H) × 0.282mm(V) |
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Video |
R, G, B Analog Interface |
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Digital Interface |
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Input |
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Separate Sync. |
H/V TTL |
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H-Frequency |
30kHz – 83kHz |
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V-Frequency |
55-75Hz |
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Display Colors |
16.7M Colors |
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Dot Clock |
165MHz |
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Max. Resolution |
1680 x 1050@60Hz |
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Plug & Play |
VESA DDC2BTM |
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Power Consumption |
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ON Mode |
≤49W(max) |
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OFF Mode |
≤2W |
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Input Connector |
D-Sub 15pin |
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DVI 24pin |
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Analog:0.7Vp-p(standard), |
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Input Video Signal |
75 OHM, Positive |
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Digital signal |
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Maximum Screen Size |
Horizontal : 473mm |
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Vertical : 296mm |
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Power Source |
100~240VAC, 47~63Hz |
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Environmental |
Operating Temp: 5° to 40°C |
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Storage Temp.: -20° to 60°C |
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Considerations |
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Operating Humidity : 15% to 90% |
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Weight (N. W.): |
6kg |
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Dimensions |
505.2(W)x428.32(H)x210.82(D)mm |
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Power Consumption (Maximum) |
49Watts |
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Regulatory Compliance |
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CE, FCC, TCO03 |
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4
22" LCD Color Monitor |
AOC 2212ph |
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
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CCFL Drive. |
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Flat Panel and |
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CCFL backlight |
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Power board |
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Main Board |
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RS232 Connector |
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For white balance |
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(Include: adapter, inverter) |
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adjustment in factory |
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mode |
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Key Board |
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Video signal, DDC |
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AC-IN |
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HOST Computer |
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100V-240V |
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5
22" LCD Color Monitor |
AOC 2212ph |
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 the front of the 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, the power indicator will light up.
3.2Control Buttons
3.2.1 Key Control
EXTERNAL CONTROLS
1. |
Auto Adjust button / Exit |
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2. |
< / Volume- , > / Volume+ |
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3. |
MENU /ENTER |
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4. |
Input Select |
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5. |
Power button |
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6. |
LED |
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FRONT PANEL CONTROL
Power Button:
Press this button to switch ON/OFF of monitor’s power.
MENU / ENTER :
Active OSD menu or function adjust confirm or Exit OSD menu when in Contrast /Brightness OSD status.
6
22" LCD Color Monitor |
AOC 2212ph |
< / Volume- , > / Volume+ : |
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Activates the volume control when the OSD is OFF or navigate through adjustment icons when OSD is ON or adjust a function when function is activated.
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Input Select:
Select the VGA / DVI/YPBPR or HDMI function.
Power Indicator:
Green — Power On mode. Orange —Off mode.
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 optimized 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.
7
22" LCD Color Monitor |
AOC 2212ph |
3.3 OSD Settings
1.Press the MENU-button to activate the OSD window (Figure 5).
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 |
Main |
Sub |
Sub Menu |
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Menu |
Menu |
Menu |
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Description |
Item |
Icon |
Item |
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Brightnes |
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Backlight Adjustment |
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Contrast |
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Contrast from Digital-register. |
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Standard |
Standard Mode |
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Text |
Text Mode |
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Eco |
Internet |
Internet Mode |
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Luminanc |
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Game |
Game Mode |
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Movie |
Movie Mode |
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Sports |
Sports Mode |
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Gamma1 |
Adjust to Gamma1 |
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Gamma |
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Gamma2 |
Adjust to Gamma 2 |
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Gamma3 |
Adjust to Gamma 3 |
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DCR |
Off |
Disable dynamic contrast ratio |
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On |
Enable dynamic contrast ratio |
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8
22" LCD Color Monitor |
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AOC 2212ph |
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Main |
Main |
Sub Menu |
Sub Menu |
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Menu |
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Description |
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Menu Icon |
Item |
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Item |
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Volume |
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Adjust volume. |
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Audiu |
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Balance |
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Adjust balance. |
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Control |
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Bass |
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Adjust bass. |
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Treble |
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Adjust treble. |
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Clock |
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Vertical-Line noise. |
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Focus |
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Adjust Picture Phase to reduce |
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Image |
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Horizontal-Line noise |
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Setup |
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H.Position |
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Adjust |
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picture. |
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V.Position |
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Adjust |
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picture. |
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Warm |
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Recall Warm Color Temperature from |
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EEPROM. |
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Normal |
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Recall Normal Color Temperature from |
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EEPROM. |
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Cool |
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Recall |
Cool |
Color Temperature |
from |
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EEPROM. |
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Color |
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sRGB |
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EEPROM. |
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Temp. |
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User-B |
Blue Gain from Digital-register |
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User-G |
Green Gain Digital-register. |
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User |
User-R |
Red Gain from Digital-register |
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User-Y |
Yellow Gain from Digital-register |
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User-C |
Cyan Gain from Digital-register |
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User-M |
Magenta Gain from Digital-register |
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Main |
Main |
Sub Menu |
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Menu |
Sub Menu |
Description |
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Menu Icon |
Item |
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Color |
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Full |
on or off |
Disable or Enable Full Enhance Mode |
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Enhance |
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Boost |
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Nature Skin |
on or off |
Disable or Enable Nature Skin Mode |
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Green Field |
on or off |
Disable or Enable Green Field Mode |
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Sky-blue |
on or off |
Disable or Enable Sky-blue Mode |
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AutoDetect |
on or off |
Disable or Enable AutoDetect Mode |
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9
22" LCD Color Monitor |
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AOC 2212ph |
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Demo |
on or off |
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Disable or Enable Demo |
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Frame Size |
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Adjust Frame Size |
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Brightness |
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Adjust Frame Brightness |
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Contrast |
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Adjust Frame Contrast |
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Picture |
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Hue |
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Adjust Frame Hue |
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Boost |
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Saturation |
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Adjust Frame Saturation |
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Position |
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Adjust Frame Position |
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Bright |
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Disable or Enable Bright Frame |
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Frame |
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Main |
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Main |
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Sub Menu |
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Menu |
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Menu |
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Sub Menu |
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Description |
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Item |
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Item |
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Icon |
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H.Position |
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Adjust the vertical position of OSD |
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OSD |
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V.Position |
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Adjust the horizontal position of OSD |
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Setup |
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Timeout |
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Adjust the OSD Timeout |
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Language |
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Select the OSD language |
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HDMI |
Select HDMI Sigal Source as Input |
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Ypbpr |
Select Ypbpr Sigal Source as Input |
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Input Select |
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Digital |
Select Digital Sigal Source as Input |
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Analog |
Select Analog Sigal Source as Input |
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Extra |
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Auto Config |
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Auto adjust the picture to default |
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DDC/CI |
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Turn ON/OFF DDC/CI Support |
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Reset |
yes or no |
Reset the menu to default |
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Information |
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Show the information of the main image and |
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sub-image source |
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10
22" LCD Color Monitor |
AOC 2212ph |
4. Input/Output Specification
4.1 Input Signal Connector
Analog connectors
1 |
5 |
6 |
10 |
11 |
15 |
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15 - Pin Color Display Signal Cable |
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PIN NO. |
DESCRIPTION |
PIN NO. |
DESCRIPTION |
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1. |
Red |
9. |
+5V |
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2. |
Green |
10. |
Detect Cable |
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3. |
Blue |
11. |
Ground |
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4. |
Ground |
12. |
DDC-Serial Data |
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5. |
Ground |
13. |
H-Sync |
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6. |
R-Ground |
14. |
V-Sync |
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7. |
G-Ground |
15. |
DDC-Serial Clock |
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8. |
B-Ground |
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24 - Pin Color Display Signal Cable
PIN NO. |
DESCRIPTION |
PIN NO. |
DESCRIPTION |
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1. |
TMDS Data 2- |
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13. |
TMDS Data 3+ |
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2. |
TMDS Data 2+ |
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14. |
+5V Power |
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3. |
TMDS |
Data |
2/4 |
15. |
Ground(for+5V) |
Shield |
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4. |
TMDS Data 4- |
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16. |
Hot Plug Detect |
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5. |
TMDS Data 4+ |
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17. |
TMDS Data 0- |
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6. |
DDC Clock |
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18. |
TMDS Data 0+ |
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7. |
DDC Data |
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19. |
TMDS Data 0/5 |
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Shield |
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8. |
N.C. |
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20. |
TMDS Data 5+ |
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9. |
TMDS Data 1- |
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21. |
TMDS Data 5- |
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10. |
TMDS Data 1+ |
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22. |
TMDS Clock Shield |
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11. |
TMDS |
Data |
1/3 |
23. |
TMDS Clock + |
Shield |
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11
22" LCD Color Monitor |
|
AOC 2212ph |
||||
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12. |
TMDS Data 3- |
24. |
TMDS Clock - |
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4.2 Factory Preset Display Modes
STANDARD |
RESOLUTION |
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HORIZONTAL |
VERTICAL |
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FREQUENCY |
FREQUENCY |
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PC MODES |
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640x480 |
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31.469kHz |
60 Hz |
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640x480 |
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37.861kHz |
72 Hz |
VGA |
640x480 |
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37.500kHz |
75 Hz |
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800x600 |
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35.156kHz |
56 Hz |
SVGA |
800x600 |
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37.879kHz |
60 Hz |
800x600 |
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48.077kHz |
72 Hz |
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800x600 |
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46.875kHz |
75 Hz |
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1024x768 |
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48.363kHz |
60 Hz |
XGA |
1024x768 |
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56.476kHz |
70 Hz |
1024x768 |
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57.700kHz |
72 Hz |
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1024x768 |
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60.023kHz |
75 Hz |
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1280x1024 |
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63.981kHz |
60 Hz |
|
1280x1024 |
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74.40kHz |
70 Hz |
SXGA |
1280x1024 |
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77.900kHz |
72 Hz |
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1280x1024 |
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79.976kHz |
75 Hz |
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1280x960 |
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60.000kHz |
60 Hz |
WXGA+ |
1440x900 |
|
55.930kHz |
60 Hz |
WSXGA |
1680x1050 |
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65.290kHz |
60Hz |
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HDMI & YPbPr MODES |
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480i |
720x480 i |
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15.75 kHz |
60 Hz |
480P |
720x480P |
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31.47 kHz |
60 Hz |
720P |
1280x720P* |
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45.00 kHz |
60 Hz |
1080i |
1920x1080i* |
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33.75 kHz |
60 Hz |
1080P |
1920x1080P |
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67.5 0kHz |
60 Hz |
576P |
720x576P |
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31.25 kHz |
50 Hz |
576I |
720x576i |
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31.25 kHz |
50 Hz |
720P |
1280x720 |
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37.50 kHz |
50 Hz |
1080P |
1920x1080P |
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56.25 kHz |
50 Hz |
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12
22" LCD Color Monitor |
AOC 2212ph |
4.3 Panel Specification
4.3.1 General Features
The M220Z1-L01 model is a 22 inch wide TFT-LCD module with a 4-CCFL Backlight Unit and a 30-pin 2ch-LVDS interface. This module supports 1680 x 1050 WSXGA+ (16:10 wide screen) mode and displays up to 16.7 millions colors. The inverter module for the Backlight Unit is not built in.
4.3.2 Features
-Super wide viewing angle
-High contrast ratio
-Fast response time
-High color saturation (EBU Like Specifications)
-WSXGA+ (1680 x 1050 pixels) resolution
-DE (Data Enable) only mode
-LVDS (Low Voltage Differential Signaling) interface
4.3.3 Display Characteristics
13
22" LCD Color Monitor |
AOC 2212ph |
4.3.4 Optical Characteristics
4.3.5Electrical Characteristics
(1)TFT-LCD
(2) Backlight
14
22" LCD Color Monitor
5. Block Diagram
5.1 Software Flow Chat
18
AOC 2212ph
1
2
N
4
5
Y
6
7
Y
9
10 Y
N12
Y
14
N19 Y
Y 3
N
N 8
N 11
13 N
Y
15 N 16 Y
17
15
22" LCD Color Monitor |
AOC 2212ph |
1)MCU initialize.
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 disappear.
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?
16
22" LCD Color Monitor |
AOC 2212ph |
5.2 Electrical Block Diagram
5.2.1 Main Board
17
22" LCD Color Monitor |
AOC 2212ph |
5.2.2 Inverter/Power Board
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Bridge |
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Rectifier |
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Transformer |
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EMI filter |
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Rectifier |
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diodes |
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and Filter |
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CN902 |
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Start Circuit: R904,R932,R933 |
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12V |
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5V |
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Feedback |
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CN902 |
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PWM |
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Control IC |
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Output |
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MOSFET |
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Circuit |
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Transformer |
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Lamp |
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Control |
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Control IC |
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18
22" LCD Color Monitor |
AOC 2212ph |
6. Schematic
6.1 Main Board
19
22" LCD Color Monitor |
AOC 2212ph |
20