19" LCD Color Monitor |
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AOC 197P+ |
Service
Service
Service
Horizontal Frequency 30-83 kHz
TABLE OF CONTENTS
Description Page
Table Of Contents.......…….................……...........…........1
Revision List.…........................………................……......2
1. Monitor Specification.................................………........3 2.LCD Monitor Description…………………………….......4
3. Operation Instruction…………...................…...........5
Description |
Page |
6.1Software Flow Chat…….…..........………….........11
6.2Electrical Block Diagram………...………...…......12 7. Schematic……………………………………………. 15
7.1Main Board…………..............................................15
7.2Power Board....……………....................................20
3.1General Instructions.....................................…...........5 8. PCB Layout..………….......................................22
3.2Control Button……………………………..……...........5 8.1 Main Board……………......................................22
3.3 Adjusting the Picture...........................…............6
4. Input/Output Specification............……………............7
8.2Power Board…......................................................25
8.3Key Board……………….....................................28
4.1Input Signal Connector............…..……................7 8.4 Audio Board………………………………………….28
4.2Factory Preset Display Modes.........................8 9. Maintainability……….......................................29
4.3 Power Supply Requirements…………………………8
5 Panel Specification.....…………………........................9
9.1. Equipments and Tools Requirement |
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9.2. Trouble Shooting…………....................................30 |
5.1Display Characteristics………………………………9 10. White-Balance, Luminance adjustment.................35
5.2Optical Characteristics………………………………..9 11.Monitor Exploded View……..……………............36
5.3 Parameter guide line for CCFL Inverter……………..10 12. BOM List....……....................................................37
6.Block Diagram…….…................………….........11
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
19" LCD Color Monitor |
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AOC 197P+ |
Revision List
Revision |
Date |
Revision History |
TPV Model |
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A00 |
Apr.-23-2007 |
Initial release |
T97HM8HLF1MGAE |
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2
19" LCD Color Monitor |
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AOC 197P+ |
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1. Monitor Specifications |
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Model number |
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197P+ |
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Driving system |
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TFT Color LCD |
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Size |
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48cm(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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Video |
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R, G, B Analog interface & Digital Interface |
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Separate Sync. |
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H/V TTL & TMDS |
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Display Color |
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16.2million Colors |
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Dot Clock |
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135MHz |
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Horizontal scan range |
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30 kHz - 83 kHz |
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Horizontal scan Size(Maximum) |
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376.32mm |
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Vertical scan range |
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55 Hz - 75 Hz |
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Vertical scan Size(Maximum) |
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301.056mm |
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Optimal preset resolution |
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1280 x 1024 (60 Hz) |
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Resolution |
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Highest preset resolution |
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1280 x 1024 (75 Hz) |
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Highest addressable resolution |
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1280 x 1024 (75 Hz) |
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Plug & Play |
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VESA DDC2B |
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Input Connector |
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D-Sub 15pin & DVI-D |
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Analog: 0.7Vp-p(standard), 75 OHM, Positive & DVI-D Digital |
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Input Video Signal |
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Interface (TMDS) |
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Power Source |
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100~240VAC, 47~63Hz |
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Connector Type |
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15-pin Mini D-Sub & DVI-D |
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Signal Cable Type |
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Detachable |
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Dimensions & Weight: |
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Physical |
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Height (with base) |
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415(mm) |
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Characteristics |
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Width |
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413(mm) |
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Depth |
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256(mm) |
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Weight (monitor only) |
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6.0(Kg) |
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Weight (with packaging) |
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7.5(Kg) |
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Temperature: |
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Operating |
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0°C- +50°C |
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Non-Operating |
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-20°C- 60°C |
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Humidity: |
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Environmental |
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Operating |
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10% to 85% (non-condensing) |
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Non-Operating |
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5% to 80% (non-condensing) |
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Altitude: |
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Operating |
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0~3000m (0~10000 ft) |
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Non-Operating |
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0~5000m (0~15000 ft) |
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Regulations |
CCC,cULus,FCC,CE,MPRII,RoHS |
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3
19" LCD Color Monitor |
|
AOC 197P+ |
2. LCD Monitor Description
The LCD MONITOR will contain a main board, a power board, an audio 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
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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Keyboard |
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AC-IN |
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Video signal DDC |
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100V-240V |
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HOST Computer |
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4
19" LCD Color Monitor |
|
AOC 197P+ |
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
1 |
Power Button & Indicator |
4 |
- / Brightness |
2 |
Menu / Enter |
5 |
Auto config / Exit |
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+ / Contrast |
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/Power Button & Indicator:
Press this button to turn the monitor ON or OFF, And display the monitor’s state.
-Power Indicator:
-Green — Full Power Mode
-Orange — Active-off Mode
-MENU / ENTER :
Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD menu when in Volume Adjust OSD status.
-+/ Contrast:
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.
-- / Brightness:
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.
-Auto config / Exit:
1.When OSD menu is in active status, this button will act as EXIT-KEY (EXIT OSD menu).
2.When OSD menu is in off status, press this button for 2 seconds to activate the Auto Adjustment function. The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
5
19" LCD Color Monitor |
|
AOC 197P+ |
3.3 Adjusting the Picture
·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.
Main Menu |
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Main Menu |
Sub Menu |
Sub Menu |
Description |
Item |
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Icon |
Item |
Icon |
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Luminance |
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Contrast |
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Contrast from Digital-register. |
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Brightness |
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Backlight Adjustment |
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Image Setup |
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Focus |
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Adjust Picture Phase to reduce Horizontal-Line noise |
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Clock |
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Adjust picture Clock to reduce Vertical-Line noise. |
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Image |
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H. Position |
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Adjust the horizontal position of the picture. |
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Position |
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V. Position |
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Adjust the vertical position of the picture. |
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Warm |
N/A |
Recall Warm Color Temperature from EEPROM. |
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Cool |
N/A |
Recall Cool Color Temperature from EEPROM. |
Color Temp. |
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sRGB |
N/A |
Recall sRGB Temperature 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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User / Blue |
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Blue Gain from Digital-register. |
Auto |
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Yes |
N/A |
Auto adjusting H/V position, focus, phase. |
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Adjustment |
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No |
N/A |
Back to main OSD. |
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H. Position |
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Adjust the horizontal position of the OSD. |
OSD Setup |
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V. Position |
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Adjust the vertical position of the OSD. |
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OSD Timeout |
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Adjust the OSD timeout. |
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Language |
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Language |
N/A |
Set OSD language. |
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Information |
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Information |
N/A |
Show the resolution, H/V frequency and input port of current |
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input timing. |
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Reset |
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Yes |
N/A |
Clear each old status of Auto-configuration . |
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No |
N/A |
Do not execute reset, return to main menu. |
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Exit |
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N/A |
N/A |
Exit OSD |
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6
19" LCD Color Monitor |
|
AOC 197P+ |
4. Input/Output Specification
4.1Input Signal Connector
4.1.1D-SUB connector
PIN NO. |
DESCRIPTION |
PI N NO. |
DESCRIPTION |
1 |
Video-Red |
9 |
+5V |
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Video-Green |
10 |
Detect Cable |
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Video-Blue |
11 |
Ground |
4 |
GND |
12 |
DDC-Serial data |
5 |
DDC-Return |
13 |
H-sync |
6 |
GND-R |
14 |
V-sync |
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GND-G |
15 |
DDC-Serial clock |
8 |
GND-B |
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VGA connector layout |
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5 |
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6 |
10 |
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11 |
15 |
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4.1.2 DVI-D connector
Pin No. |
Signal Name |
Pin No. |
Signal Name |
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TMDS Data 2- |
13 |
TMDS Data 3+ |
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TMDS Data 2+ |
14 |
+5V Power |
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3 |
TMDS Data 2/4 Shield |
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Ground(for+5V) |
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TMDS Data 4- |
16 |
Hot Plug Detect |
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5 |
TMDS Data 4+ |
17 |
TMDS Data 0- |
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6 |
DDC Clock |
18 |
TMDS Data 0+ |
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7 |
DDC Data |
19 |
TMDS Data 0/5 Shield |
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8 |
N.C. |
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TMDS Data 5- |
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TMDS Data 1- |
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TMDS Data 5+ |
10 |
TMDS Data 1+ |
22 |
TMDS Clock Shield |
11 |
TMDS Data 1/3 Shield |
23 |
TMDS Clock + |
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12 |
TMDS Data 3- |
24 |
TMDS Clock - |
24 - Pin Color Display Signal Cable
7
19" LCD Color Monitor |
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AOC 197P+ |
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4.2 Factory Preset Display |
Modes |
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Standard |
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Resolution |
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Horizontal |
Vertical |
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Frequency (kHz) |
Frequency (Hz) |
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Dos-mode |
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720 x 400 |
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31.47 |
70 |
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VGA |
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640 x 480 |
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31.47 |
60 |
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VGA |
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640 x 480 |
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37.5 |
75 |
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SVGA |
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800 x 600 |
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37.879 |
60 |
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SVGA |
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800 x 600 |
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46.875 |
75 |
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XGA |
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1024 x 768 |
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48.363 |
60 |
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XGA |
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1024 x 768 |
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56.476 |
70 |
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XGA |
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1024 x 768 |
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60.02 |
75 |
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XGA |
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1024 x 768 |
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48.78 |
60 |
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XGA |
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1024 x 768 |
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60.241 |
75 |
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SXGA |
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1280 x 1024 |
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64 |
60 |
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SXGA |
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1280 x 1024 |
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80 |
75 |
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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) |
8
19" LCD Color Monitor |
|
AOC 197P+ |
5 Panel Specification
5.1 Display Characteristics
5.2 Optical Characteristics
9
19" LCD Color Monitor |
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AOC 197P+ |
5.3 Parameter guide line for CCFL Inverter 1.TFT LCD Module:
2.Back Light Unit:
10
19" LCD Color Monitor |
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AOC 197P+ |
6. Block Diagram
6.1 Software Flow Chat
1
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Y |
3 |
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4
5 N
Y
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7 |
N |
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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
11
19" LCD Color Monitor |
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AOC 197P+ |
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?
12
19" LCD Color Monitor |
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AOC 197P+ |
6.2 Electric Block Diagram
6.2.1 Main Board
LCD Interface
(CN101)
FLASH MEMORY |
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Scalar TSUMO56J |
PM25LV512 |
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(Include: MCU, ADC, OSD etc) |
(U402) |
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(U401) |
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H sync |
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RGB |
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V sync |
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DCLK+ |
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RGB |
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DCLK- |
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EEPROM |
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24LC16B |
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(U403) |
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D-Sub |
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DVID |
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Connector |
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Connector |
(CN405) |
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(CN406) |
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EEPROM |
EEPROM |
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M24C02 |
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M24C02 |
(U404) |
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(U405) |
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13
19" LCD Color Monitor |
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AOC 197P+ |
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6.2.2 Inverter / Power Board |
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Bridge |
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Rectifier |
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AC input |
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Transformer |
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EMI filter |
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Rectifier |
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diode |
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and Filter |
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Start Circuit: R905 R906 |
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R907 R908 R909 R910 |
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5V |
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12V |
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PWM |
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Over |
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Control IC |
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Voltage |
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Protect |
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ON/OFF |
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OSC and |
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DC Convert |
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MOSFET |
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Output |
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Circuit |
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Lamp |
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Circuit |
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PWM |
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Feedback |
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Over Voltage |
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PWM |
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ON/OFF Control |
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Circuit |
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Protect |
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Control IC |
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DIM
14
19" LCD Color Monitor |
AOC 197P+ |
7. Schematic
7.1 Main Board
15