AOC W19 Service Manual
19" LCD Color Monitor |
HP W19 |
Service
Service
Service
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Horizontal Frequency |
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3083 kHz |
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TABLE OF CONTENTS |
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Description |
Page Description |
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Table Of Contents.......……..............................…........1
Revision List.…........................................……......2
1.Monitor Specification..............................………........3
2.LCD Monitor Description…………………………….......4
3.Operation Instruction…………...............……...........5
3.1.General Instructions...........................…...........5
3.2.Control Button…………….…..............……...............5 3.3 Adjusting the Picture...........................…............6
4.Input/Output Specification............……………............7
4.1.Input Signal Connector............………….................7
4.2.Factory Preset Display Modes......…..................8
5.Panel Specification.....………………..................9
5.1.General Feature…….....………………..................9
5.2.Optical Characteristics………………………………9
6.Block Diagram……...................…………................10
6.1.Monitor Exploded View…………………....….......10
6.2 Software Flow Chart…………………….……….11
6.3. Electrical Block Diagram……………..….......13
7. Schematic……………......................................15
7.1Main Board....……….......................................15
7.2Power Board.….……....................................21 8.PCB Layout..………….......................................24
8.1.Main Board………........................................24
8.2.Power Board….......................................27
8.3.Adapter Board………............….......................30 9. Maintainability……….......................................31
9.1.Equipments and Tools Requirement..............31
9.2.Trouble Shooting………..............................32 10. White-Balance, Luminance adjustment...36 11. BOM List….....................................................37 12. Different Parts List…………………………………47
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
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19" LCD Color Monitor |
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HP W19 |
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Revision List |
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Version |
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Revision History |
TPV Model Name |
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A00 |
Jun.-03-2007 |
first release |
T97MM2HKWEHANE |
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A01 |
Jun.-19-2007 |
Add TPVDW Model in Item 12 |
T97SM2HKWEHANE |
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A02 |
Sep.-04-2007 |
Add TPVDW Model in Item 12 |
T97MM2HTWEHPNNE |
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T97SM2HTWEHPNNE |
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2
19" LCD Color Monitor |
HP W19 |
1. Monitor Specification
3
19" LCD Color Monitor |
HP W19 |
2. LCD Monitor Description
The LCD Monitor will contain main board, power board, key 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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Inverter board |
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Main Board |
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RS232 Connector |
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For white balance |
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DC-IN |
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adjustment in factory |
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mode |
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Keyboard |
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12V |
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Adaptor board |
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Video signal |
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HOST Computer |
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AC-IN 100V-240V
4
19" LCD Color Monitor |
HP W19 |
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 of the panel. By changing these settings, the picture can be adjusted to your personal performance.
-The power cord should be connected and insert to adaptor.
-Connect the video cable from the monitor to the computer VGA card.
-Press the power button to turn on the monitor, the power indicator will light up to Green.
3.2Control Buttons
3.3 Adjust the Picture
5
19" LCD Color Monitor |
HP W19 |
6
19" LCD Color Monitor |
HP W19 |
4. Input/Output Specification
4.1 Input Signal Connector
7
19" LCD Color Monitor |
HP W19 |
4.2 Factory Preset Display Modes
8
19" LCD Color Monitor |
HP W19 |
5. Panel Specification
5.1 General Feature
Mechanical Information
5.2 Optical Characteristics
TFT LCD Module:
Back Light Unit:
Optical Specification
9
19" LCD Color Monitor |
HP W19 |
6. Block Diagram
6.1 Monitor Exploded View
10
19" LCD Color Monitor |
HP W19 |
6.2 Software Flow Chart
1
Y
2 
3
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Y |
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7 8
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Y |
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Y |
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Y |
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N |
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Y |
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18 N 19
Y
11
19" LCD Color Monitor |
HP W19 |
REMARK:
1)MCU initialize.
2)Is the EEprom blank?
3)Program the EEprom by default values.
4)Get the PWM value of brightness from EEprom.
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 EEprom. Turn on the LED and set it to green color. Scalar initialize.
10)In standby mode?
11)Update the lifetime of back light.
12)Check the analog port, are they’re 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 |
HP W19 |
6.3 Electrical Block Diagram
6.3.1 Scalar Board
LCD Interface
(CN503)
MCU |
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TSU56AK-LF |
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MTV512GMV PLCC-44 |
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(U601) |
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(Include ADC, OSD) |
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(U401) |
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EPR_SDA |
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EPR_SCL |
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H sync |
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RGB |
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Crystal |
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EEPROM |
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X601 |
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M24C16 |
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V sync |
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CLK+ |
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24Mhz |
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(U602) |
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RGB |
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CLK- |
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Crystal |
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D-Sub |
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DVI |
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X401 |
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Connector |
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Connector |
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14.318Mhz |
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(CN301) |
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(CN302) |
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Key Board |
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CN602 |
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DB15_SDA, |
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SDA, |
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DB15_SCL |
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SCL |
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EEPROM |
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EEPROM |
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M24C02 |
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M24C02 |
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(U301) |
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(U302) |
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13
19" LCD Color Monitor |
HP W19 |
6.3.2 Inverter / Power Board
AC inlet |
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filter |
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Rectifier and filter |
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Transformer |
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Start circuit R903;R904
OVP circuit
Switching circuit
PWM control IC&MOSFET
On/off control |
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Start circuit |
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Rectifier and filter 
12V D904;D905
To main board
Feedback circuit
IC902;IC903 12V
PWM control IC |
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lamp |
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BUCK and chock |
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LC royer circuit |
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Ballast capacitor |
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Dimming control |
Feebback circuit |
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14
19" LCD Color Monitor |
HP W19 |
7. Schematic
7.1 Main Board
15
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