AOC 196V
SERVICE MANUAL
19” LCD Monitor
196V
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
1
AOC 196V
Table of Content
Revision List…………………………………………………………………………………………………………. 3
1.Monitor Specifications………………………………………………………………………………………….. 4
2.LCD Monitor Description……………………………………………………………………………………….. 5
3.Operating Instructions………………………………………………………………………………………….. 6
3.1General Instructions…………………………………………………………………………………………... 6
3.2Control Buttons………………………………………………………………………………………………... 6
3.3Adjusting the Picture………………………………………………………………………………………….. 7
4.Input/Output Specification……………………………………………………………………………………... 9
4.1Input Signal Connector……………………………………………………………………………………….. 9
4.2Factory Preset Display Modes……………………………………………………………………………….. 10
4.3 Power Supply Requirements………………………………………………………………………………… 11
4.4Panel Specification………………………………………………………………………………………….… 11
4.4.1Panel Feature…………………………………………………………………………………………….. 11
4.4.2Display Characteristics………………………………………………………………………………….. 11
4.4.3Optical Characteristics…………………………………………………………………………………… 12
4.4.4 Parameter Guide Line For CCFL Inverter……………………………………………………………… 13
5.Block Diagram………………………………………………………………………………………………….… 14
5.1Monitor Exploded View……………………………………………………………………………………….. 14
5.2Software Flow Chart…………………………………………………………………………………………... 15
5.3Electrical Block Diagram……………………………………………………………………………………… 17
5.3.1Main Board………………………………………………………………………………………………... 17
5.3.2Inverter/Power Board………………………………………………………….…………………………. 18
6.Schematic……………………………………………………………………………………………………….… 19
6.1Main Board…………………………………………………………………………………………………….. 19
6.2Power Board……………………………………………………………………….………………………….. 25
6.3Audio Board……………………………………………………………………….………………………….. 28
7.PCB Layout………………………………………………………………………………………………………. 30
7.1Main Board…………………………………………………………………………………………………….. 30
7.2Power Board………………………………………………………………………….……………………….. 31
7.3Audio Board…………………………………………………………….……………………………………… 31
7.4Key Board……………………………………………………………………………………………………… 31
8.Maintainability……………………………………………………………………………………………………. 32
8.1 Equipments and Tools Requirement………………………………………………………………………… 32
8.2Trouble Shooting…………………………………………………………………………………………….… 33
8.2.1Main Board………………………………………………………………………………………………... 33
8.2.2Power /Inverter Board……………………………………………………………………………………. 36
8.2.3Keypad Board…………………………………………………………………………………………….. 38
9.White-Balance, Luminance adjustment…………………………………………………………….……….. 39
10.EDID Content……………………………………………………………………………………………………. 40
11.BOM LIST………………………………………………………………………………………………………... 41
2
AOC 196V
Revision List
Revision |
Date |
TPV Name |
Change Description |
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A00 |
Nov-08-05 |
T980KH2HD4A1A |
Original Revision |
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AOC 196V |
1.MONITOR SPECIFICATIONS |
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Driving system |
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TFT Color LCD |
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Size |
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48.0cm(19.0") |
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LCD Panel |
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Pixel pitch |
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0.294mm( H )x 0.294mm( V ) |
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Viewable angle |
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140˚ (H) 130˚ (V) (CR>10) |
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Response time (type) |
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8 ms for HSD panel |
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Sync. Type |
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H/V TTL |
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Input |
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H-Frequency |
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30kHz – 83kHz |
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V-Frequency |
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55-75Hz |
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Display Color |
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16.1M (6-bits+FRC) |
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Dot Clock |
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135MHz |
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Contrast Ratio |
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600:1 |
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250cd/m2 |
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White Luminance |
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Max. Resolution |
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1280 x 1024 |
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VESA DDC2BTM |
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Plug & Play |
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ON Mode<55W |
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Power Consumption |
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OFF Mode<3W |
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Power Source |
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100~240VAC,47~63Hz |
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Horizontal : 376.32mm |
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Maximum Screen Size |
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Vertical: 301.056mm |
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Operating Temp: 0°C to 40°C |
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Environmental |
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Storage Temp: -20°C to 60°C |
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Considerations |
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Operating Humidity: 15% to 90% |
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4
AOC 196V
2. LCD MONITOR DESCRIPTION
The LCD MONITOR will contain a main board, a power board, a keypad board and an audio 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
CCFL Drive. |
Flat Panel and |
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CCFL backlight |
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PWPC board |
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Main Board |
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RS232 Connector |
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(Include: adapter, inverter) |
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For white |
balance |
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adjustment |
in factory |
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mode |
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Audio board |
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Keyboard |
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AC-IN |
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Video signal, |
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100V-240V |
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HOST Computer |
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5
AOC 196V
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, the power indicator will light up.
3.2CONTROL BUTTONS
-Power Button:
When pressed, the monitor enters the off mode, and the LED turns blank. Press again to restore normal status.
-Left / Right Button:
The Left/Right Button is used to control the monitor functions. Press to switch functions or adjust settings.
-Auto Adjust Key:
The Auto Adjust Key is used to automatically set the H Position, V Position, Clock and Phase.
-Power Indicator:
Blue |
— Power On mode. |
Orange |
— Power Saving mode. |
Blank |
—Power Off Mode. |
LED = GREEN, BLINKING (0.5s period) —Out of Range
NO. |
Name |
Within OSD |
Without OSD |
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1 |
MENU |
Select Function or select Sub menu |
Activate OSD main menu |
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2 |
VOL+ / |
Adjust up when menu item selected |
Increase the value of volume |
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3 |
POWER |
Power On / Off |
Power On / Off |
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VOL-/ |
Adjust down when menu item selected |
Decrease the value of the volume |
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5 |
Auto/EXIT |
Exit OSD or back to previous menu |
Auto configuration |
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6
AOC 196V
3.3 ADJUSTING THE PICTURE
Adjustment steps:
1.Press the MENU-button to activate the OSD window.
2.Press < or > to select the desired function.
3.Press the MENU-button to select the function that you want to adjust.
4.Press < or > to change the settings of the current function.
5.To exit and save, select the exit function, or leave the monitor alone for 10 seconds. If you want to adjust any other function, repeat steps 2-4.
OSD TABLE:
Main Menu |
Main Menu |
Sub Menu Item |
Sub Menu Icon |
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Description |
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Item |
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Icon |
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Contrast |
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Contrast from Digital-register. |
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Luminance |
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Brightness |
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Backlight Adjustment |
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Focus |
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Adjust |
Picture |
Phase to |
reduce |
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Horizontal-Line noise |
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Image Setup |
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Clock |
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Adjust |
picture |
Clock |
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Vertical-Line noise. |
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H. Position |
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Adjust the horizontal position of the |
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Image |
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picture. |
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Position |
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V. Position |
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Adjust |
the vertical position |
of the |
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picture. |
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Color Temp. |
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Warm |
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N/A |
Recall |
Warm |
Color |
Temperature |
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from EEPROM. |
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Cool |
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N/A |
Recall Cool Color Temperature from |
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EEPROM. |
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sRGB |
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N/A |
Recall |
sRGB |
Color |
Temperature |
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from EEPROM. |
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User / Red |
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Red Gain from Digital-register. |
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User / Green |
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Green Gain Digital-register. |
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AOC 196V |
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User / Blue |
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Blue Gain from Digital-register. |
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Auto Config |
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Yes |
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Auto Adjust the H/V Position, Focus |
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and Clock of picture. |
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Do not execute Auto Config, return |
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No |
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to main menu. |
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H. Position |
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Adjust the horizontal position of the |
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OSD. |
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OSD Setup |
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V. Position |
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Adjust the |
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OSD. |
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OSD Timeout |
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Adjust the OSD timeout. |
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English |
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N/A |
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OSD |
display |
language |
to |
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Deutsch |
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OSD |
display |
language |
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German. |
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Language |
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Français |
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N/A |
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OSD |
display |
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Español |
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Set OSD display language to Spain. |
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Italiano |
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N/A |
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OSD |
display |
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Show the resolution, H/V frequency |
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Information |
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Information |
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and |
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input |
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timing. |
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Clear |
each |
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Yes |
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N/A |
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Auto-configuration and set the color |
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Reset |
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temperature to Cool. |
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No |
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Do not execute reset, return to main |
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menu. |
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Exit |
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N/A |
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N/A |
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Exit OSD |
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8
AOC 196V
4. Input/Output Specification
4.1 Input Signal Connector
1 D-SUB connector
PIN NO. |
DESCRIPTION |
PI N NO. |
DESCRIPTION |
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1. |
Red Video |
9. |
No Pin! |
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2. |
Green Video |
10. |
Logic Ground |
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3. |
Blue Video |
11. |
Monitor Ground |
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4. |
Monitor Ground |
12. |
DDC-Serial Data |
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5. |
DDC-Return |
13. |
H-Sync |
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6. |
Red Ground |
14. |
V-Sync |
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7. |
Green Ground |
15. |
DDC-Serial Clock |
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8. |
Blue Ground |
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VGA connector layout
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1 |
5 |
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6 |
10 |
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11 |
15 |
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2 DVI connector |
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PIN NO. |
DESCRIPTION |
PI N NO. |
DESCRIPTION |
1. |
TMDS data 2 |
13. |
TMDS data 3 |
2. |
TMDS data 2 |
14. |
5V Power |
3. |
TMDS data 2/4 Shield |
15. |
GND (return for +5v,hsync, vsync) |
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. |
Analog Vertical Sync |
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 |
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24 - Pin Color Display Signal Cable |
9
AOC 196V
4.2 Factory Preset Display Modes
VESA MODES
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Horizontal |
Vertical |
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Nominal |
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Nominal |
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Nominal |
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Sync |
Sync |
Pixel |
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Mode |
Resolution |
Total |
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Frequency |
Freq. |
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Polarity |
Polarity |
Clock |
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+/- 0.5kHz |
+/- 1 Hz |
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(MHz) |
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640x480@60Hz |
800 x 525 |
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31.469 |
N |
59.940 |
N |
25.175 |
VGA |
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640x480@72Hz |
832 x 520 |
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37.861 |
N |
72.809 |
N |
31.500 |
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640x480@75Hz |
840 x 500 |
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37.500 |
N |
75.00 |
N |
31.500 |
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800x600@56Hz |
1024 x 625 |
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35.156 |
N/P |
56.250 |
N/P |
36.000 |
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SVGA |
800x600@60Hz |
1056 x 628 |
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37.879 |
P |
60.317 |
P |
40.000 |
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800x600@72Hz |
1040 x 666 |
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48.077 |
P |
72.188 |
P |
50.000 |
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800x600@75Hz |
1056x625 |
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46.875 |
P |
75.000 |
P |
49.500 |
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1024x768@60Hz |
1344x806 |
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48.363 |
N |
60.004 |
N |
65.000 |
XGA |
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1024x768@70Hz |
1328x806 |
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56.476 |
N |
70.069 |
N |
75.000 |
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1024x768@75Hz |
1312x800 |
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60.023 |
P |
75.029 |
P |
78.750 |
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SXGA |
1280x1024@60Hz |
1688x1066 |
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63.981 |
P |
60.020 |
P |
108.000 |
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1280x1024@75Hz |
1688x1066 |
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79.976 |
P |
75.025 |
P |
135.000 |
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IBM MODES |
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Horizontal |
Vertical |
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DOS |
720x400@70Hz |
900 x 449 |
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31.469 |
N |
70.087 |
P |
28.322 |
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DOS |
640x400@70Hz |
800 x 449 |
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31.469 |
N |
70.087 |
P |
25.175 |
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XGA |
1024x768@72Hz |
1304 x 798 |
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57.515 |
P |
72.1 |
P |
75.000 |
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MAC MODES |
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VGA |
640x480@67Hz |
864x525 |
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35.000 |
N |
66.667 |
N |
30.240 |
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SVGA |
832x624@75Hz |
1152x667 |
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49.725 |
N |
74.551 |
N |
57.2832 |
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XGA |
1024x768@60Hz |
1312x813 |
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48.780 |
N |
60.001 |
N |
64.000 |
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1024x768@75Hz |
1328x804 |
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60.241 |
N |
74.927 |
N |
80.000 |
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10
AOC 196V
4.3 Power Supply Requirements
A/C Line voltage range |
100 V ~ 240 V |
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A/C Line frequency range |
50 ± 3Hz, 60 ± 3Hz |
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Current |
1.5A max at 100V; 0.8A max at 240 V |
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Peak surge current |
< 55A peak at 240 VAC and cold starting |
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Leakage current |
< 3.5mA |
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Power line surge |
No advance effects (no loss of information or defect) |
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with a maximum of 1 half-wave missing per second |
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DC output Voltage |
5VDC ± 5 ; 12VDC± 5 |
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CURRENT |
1.5Amp (5V) 2 Amp (12V) |
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4.4 PANEL SPECIFICATION
4.4.1Panel Feature
■19”SXGA TFT LCD panel
■4 CCFLs Backlight system
■Supported SXGA (V:1024 lines, H:1280 pixels) resolution
■Supported to 75Hz refresh rate
■LCD Timing Controller
■Compatible with RoHS standard
4.4.2Display Characteristics
11
AOC 196V
4.4.3 Optical Characteristics
12
AOC 196V
4.4.4Parameter guide line for CCFL Inverter
1.TFT LCD Module:
2.Back Light Unit:
13
AOC 196V
5. Block Diagram
5.1 Monitor Exploded View
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1 |
FUNCTION 33G6288-Y-L |
8 |
HINGE 37G 510-2 |
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2 |
LENS 33G6289-1 |
9 |
HINGE BRACKET 15G6206-1 |
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3 |
BEZEL 34G6201-Y-1B |
10 |
STAND 34G1546-Y-B |
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4 |
PANEL BRACKET 15G6207-L-3 |
11 |
BASE 34G6203-Y-2B |
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5 |
PANEL BRACKET 15G6207-R-3 |
12 |
RUBBER FOOT 12G394-3 |
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6 |
REAR COVER 34G6202-Y-1B |
13 |
MYLAR 52G6025-11-925 |
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7 |
SHIELD 85G6119-1 |
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14
AOC 176V
5.2 Software Flow Chart
1
2 |
Y |
3 |
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N
4
5 N
Y
6
7 |
N |
8 |
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Y
9
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10 |
N |
11 |
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Y |
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N |
12 |
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13 |
N |
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Y |
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Y |
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14 |
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15 |
N |
16 |
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Y |
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17 |
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18 |
N |
19 |
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Y
Page 15 of 54
AOC 176V
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?
Page 16 of 54
AOC 176V
5.3 Electrical Block Diagram
5.3.1 Main Board
LCD Interface
(CN503)
MCU |
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Scalar TSU56AK-LF |
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W78E65P-40 |
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(U601) |
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(Include ADC,OSD) |
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(U401) |
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EPR_SDA
EPR_SCL
EEPROM |
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H sync |
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AT24C16N |
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V sync |
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(U602) |
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RGB |
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D-Sub |
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Connector |
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(CN301) |
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DB15_SDA, |
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DB15_SCL |
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EEPROM |
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24C02 |
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(U301) |
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D_H sync
D_V sync
D_RGB
DVI-I only
Connector
(CN302)
DDC2_SDA,
DDC2_SCL
EEPROM 24C02 (U302)
Page 17 of 54