HP W19EV Service manual
19" LCD Color Monitor HP W19EV
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............……………............8
4.1. Input Signal Connector............………….................8
4.2. Factory Preset Display Modes......…..................9
4.3. Power Supply Requirements...............................9
5. Panel Specification.....………………..................10
5.1. General Feature…….....………………..................10
5.2. Optical Characteristics………………………………12
6. Block Diagram……...................…………................17
6.1.Monitor Exploded View…………………....….......17
6.2 Software Flow Chart………………………….……….19
6.3. Electrical Block Diagram……………..….......21
7. Schematic……………......................................23
7.1 Main Board....……….......................................23
7.2 Power Board.….……....................................28
7.3 Key Board………………….……………………30
7.4 Audio Board………………….……………………31
8.PCB Layout..…………............................................32
8.1.Main Board……….................................................32
8.2.Power Board……………......................................35
8.3.Key Board………..…............….......................38
8.4.Audio Board…….………............….......................38
9. Maintainability……….......................................39
9.1. Equipments and Tools Requirement.....................39
9.2. Trouble Shooting…….……...................................40
10. White-Balance, Luminance adjustment……..…....46
11. BOM List…............................................................48
12. Different Parts List.........…….……........................63
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 HP W19EV
Revision List
Version Date Revision History TPV Model Name
T97HGFDBW3HPAE
A00 FEB.07.07 first release
T97SGFDBW3HPAE
T97MGFDBW3HPAE
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19" LCD Color Monitor HP W19EV
1. Monitor Specification
3
19" LCD Color Monitor HP W19EV
(
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.
Power Board
Include adapter and inverter)
AC-IN
110V-240
Monitor Block Diagram
CCFT Drive.
Main Board
Audio board
Key board
Flat Panel and
CCFL backlight
RS232 Connector
For white balance
adjustment in
factory mode
Video signal, DDC
HOST Computer
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19" LCD Color Monitor HP W19EV
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
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19" LCD Color Monitor HP W19EV
3.3 Adjust the Picture
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19" LCD Color Monitor HP W19EV
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19" LCD Color Monitor HP W19EV
4. Input/Output Specification
4.1 Input Signal Connector
Pin Signal Pin Signal
1 Red Video 9 +5 V (from PC)
2 Green Video 10 Ground
3 Blue Video 11 Ground
4 Ground 12 DDC-serial Data
5 Detect Cable 13 Horizontal Sync
6 Red GND 14 Vertical Sync
7 Green GND 15 DDC-serial Clock
8 Blue GND
VGA connector layout
PIN 1
PIN 11
PIN 5
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19" LCD Color Monitor HP W19EV
4.2 Factory Preset Display Modes
4.3 Power Supply Requirements
Parameter Range
AC Line Voltage range 100 to 240V
AC Line Frequency range 47 to 63 Hz
Peak surge Current < 55 A MAX AT 220VAC and cold starting
Leakage Current < 3.5 mA
Power Consumption
≤37W
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19" LCD Color Monitor HP W19EV
5. Panel Specification
750GLH90GW112Z000H ; 750GLS90M3122Z000H ;750GLM90A1211Z000H
5.1 General Feature
750GLH90GW112Z000H
750GLS90M3122Z000H
750GLM90A1211Z000H
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19" LCD Color Monitor HP W19EV
Mechanical Information
750GLH90GW112Z000H
750GLS90M3122Z000H
750GLM90A1211Z000H
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19" LCD Color Monitor HP W19EV
5.2 Optical Characteristics
TFT LCD Module:
750GLH90GW112Z000H
750GLS90M3122Z000H
750GLM90A1211Z000H
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19" LCD Color Monitor HP W19EV
Back Light Unit:
750GLH90GW112Z000H
750GLS90M3122Z000H
750GLM90A1211Z000H
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19" LCD Color Monitor HP W19EV
Optical Specification
750GLH90GW112Z000H
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19" LCD Color Monitor HP W19EV
750GLS90M3122Z000H
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19" LCD Color Monitor HP W19EV
750GLM90A1211Z000H
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19" LCD Color Monitor HP W19EV
6. Block Diagram
6.1 Monitor Exploded View
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19" LCD Color Monitor HP W19EV
Customized bezel assembly instruction
1. We have developed two customized bezels to pair the two different panels (CMO panel and Hannstar panel) in
order to meet the following requirements,:
- The bezel opening can not hide any active pixels. That is, the full 1440*900 active matrix has to be visible.
- The bezel opening can have different amounts of “black” (inactive pixels) area, since the panel manufacturers
have different dimensions and the product overall outline is the same.
- Can not show any of the panel metal frame.
2. There is a mechanical lock-out so that the appropriate panel is always paired to the appropriate bezel, both at the
factory and the service center. Reference to the following customized bezel assembly instruction.
Bezel designed for
CMO panel has the rib.
Frame designed for
CMO panel cut the
material on the corner.
Bezel designed for Hannstar
panel does not have the rib.
Frame designed for Hannstar
panel does not have the cut
on the corner.
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19" LCD Color Monitor HP W19EV
6.2 Software Flow Chart
1
Y
2
N
3
4
5
N
Y
6
7
N
8
Y
9
10
N
11
12
Y
13
N
N
Y
14
15
Y
N
16
Y
17
18
N
19
Y
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19" LCD Color Monitor HP W19EV
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?
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19" LCD Color Monitor HP W19EV
6.3 Electrical Block Diagram
6.3.1 Scalar Board
LCD Interface
(CN501)
EEPROM
SST25VF010A-
33-4C-SAE
(U402)
EPR_SDA
EPR_SCL
Scalar IC GM5726-LF-AB (Include ADC, OSD, MCU)
H sync
V sync
RGB
DB15_SDA
DB15_SCL
D-Sub
Connector
(CN202)
(U401)
14.31818MHz
Crystal
(X301)
EEPROM
M24C02
(U202)
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