AOC W19 Service Manual
19" LCD Color Monitor HP W19
Service
Service
Service
Horizontal Frequency
30- 83 kHz
TABLE OF CONTENTS
Description Page Description Page
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
7.1 Main Board....……….......................................15
7.2 Power 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
1
19" LCD Color Monitor HP W19
Revision List
Version Date Revision History TPV Model Name
A00 Jun.-03-2007 first release T97MM2HKWEHANE
A01 Jun.-19-2007 Add TPVDW Model in Item 12 T97SM2HKWEHANE
A02 Sep.-04-2007 Add TPVDW Model in Item 12
T97MM2HTWEHPNNE
T97SM2HTWEHPNNE
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.
Inverter board
Adaptor board
DC-IN
12V
Monitor Block Diagram
CCFL Drive.
Main Board
Keyboard
HOST Computer
Flat Panel and
CCFL backlight
RS232 Connector
For white balance
adjustment in factory
mode
Video signal
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.
3.2 Control 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
N
3
4
5
N
Y
6
N
7
8
Y
9
10
N
11
12
Y
13
N
N
Y
14
15
Y
N
16
Y
17
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
MTV512GMV PLCC-44
(U601)
Crystal
X601
24Mhz
Key Board
CN602
EEPROM
M24C16
(U602)
EPR_SDA
EPR_SCL
DB15_SDA,
DB15
H sync
V sync
RGB
Connector
SCL
D-Sub
(CN301)
EEPROM
M24C02
(U301)
TSU56AK-LF
(Include ADC, OSD)
(U401)
14.318Mhz
Crystal
X401
RGB
CLK+
CLK-
SDA,
SCL
DVI
Connector
(CN302)
EEPROM
M24C02
(U302)
13
19" LCD Color Monitor HP W19
6.3.2 Inverter / Power Board
AC inlet filter Rectifier and filter
Start circuit R903;R904
Switching circuit
PWM control IC&MOSFET
On/off control
Start circuit
PWM control IC
BUCK and chock
Dimming control
OVP
Transformer
LC royer circuit
Rectifier and filter
D904;D905
Feedback circuit
IC902;IC903
Ballast capacitor
Feebback circuit
12V
To main board
12V
lamp
14
19" LCD Color Monitor HP W19
7. Schematic
7.1 Main Board
15
Loading...