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WF1907
Service Manual
104 pgs1.83 Mb0

AOC WF1907, WF1907v Service Manual

19" LCD Color Monitor HP WF1907-WF1907v
Service
Service
Service
Horizontal Frequency
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents.......……..............................…........1
Revision List.…........................................……......2
1. Monitor Specification..............................………........4
2. LCD Monitor Description…………………………….......5
3. Operation Instruction…………...............……...........6
3.1. General Instructions...........................…...........6
3.2. Control Button…………….…..............……...............6
3.3 Adjusting the Picture...........................…............7
4. Input/Output Specification............……………............10
4.1. Input Signal Connector............………….................10
4.2. Factory Preset Display Modes......…..................10
4.3. Power Supply Requirements...............................11
5. Panel Specification.....………………..................12
5.1. General Feature…….....………………..................12
5.2. Optical Characteristics………………………………13
5.3 Parameter guide line for CCFL Inverter……….…15
6. Block Diagram……...................…………................17
6.1 Software Flow Chart………………………………...17
6.2.Electrical Block Diagram……………..….......19
7. Schematic……………......................................21
8.PCB Layout..…….......................................30
8.1. Main Board………........................................30
8.2. Power Board….......................................32
9. Maintainability……….......................................34
9.1. Equipments and Tools Requirement..............34
9.2. Trouble Shooting………..............................35
10 White-Balance, Luminance adjustment...49
11. Monitor Exploded View………………..…....….......51
12. BOM List………………………………..……………52
13. Different Parts List…....................................66
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 WF1907-WF1907v
Revision List
Version Date Revision History TPV Model Name
T98AGHNKWPCPDCE
T98AGHNQWPCPDCE
T98AGHNKWPCMDCE
A00 Mar.-18-2008
Add WF1907v MODEL In Item 13
Add Second Panel list in Item 5
Add Second Panel list in Item 5 LTM190M2-L31
A01 Mar.-26-2008
Add TPVDW MODEL In Item 13
Add WF1907 MODEL In Item 13
A02 Apr.-18-2008
Add WF1907v MODEL In Item 13
Initial release
T98MGHNQWPCPDCE
T98AGHNDWPCPDCE
T98MGHNKWPCMDCE
T98AGHNLWPCMDCE
T98AGHNLWPCPDCE
T98AGHNBWPCQDCE
M190PW01 V0
M190A1-L07 C2
T98AGHNDWPCQDCE
T98MGHNKWPCPDCE
T98SGHNKWPCMDCE
T98SGHNQWPCPDCE
T98SGHNKWPCPDCE
T98MGHNLWPCPDCE
T98MGHNBWPCQDCE
T98SGHNBWPCQDCE
A03 Nov.-06-2008
Add WF1907 MODEL In Item 13
T98AGHNFWPCPDCE
T98SGHNQWPCPD1E
T98SGHNKWPCMD1E
T98SGHNLWPCQD1E
T98SGHNFWPCPD1E
T98SGHNLWPCPD1E
T98SGHNKWPCPD1E
T98SGHNDWPCQD1E
T98MGHNLWPCQDCE
T98MGHNKWPCMDNE
T98SGHNMWPCMD1E
T98MGHNMWPCMDCE
T98MGHNKWPCPDNE
T98MGHNLWPCPDNE
T98MGHNQWPCPDNE
T98MGHNLWPCQDNE
2
T98MGHNQWPCQDNE
T98AGHNQWPCQDNE
19" LCD Color Monitor HP WF1907-WF1907v
T98AGHNLWPCPDNE
T98MGHNDWPCQDNE
T98MGHNDWPCQDCE
T98SMMNQWPCPDNE
T98SMMNKWPCMDNE
T98SMMNDWPCPDNE
T98SMMNKWPCPDNE
T98SMMNMWPCPDNE
T98AGHNBWPCMDCE
T98AGHNTWPCQACE
T98MGHNTWPCQACE
Add WF1907v MODEL In Item 13
T98MGHNBWPCMDCE
T98SGHNBWPCMA1E
T98SGHNBWPCQA1E
T98SGHNTWPCQA1E
T98MGHNBWPCQDNE
3
19" LCD Color Monitor HP WF1907-WF1907v
1. Monitor Specification
4
19" LCD Color Monitor HP WF1907-WF1907v
(
2. LCD Monitor Description
The LCD Monitor will contain main board, power board, 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.
Power Board
Include adapter board)
AC-IN
110V-240V
Monitor Block Diagram
CCFT Drive.
Main Board
Keyboard
Flat Panel and
CCFL backlight
RS232 Connector
For white balance
adjustment in
factory mode
Video signal, DDC
HOST Computer
5
19" LCD Color Monitor HP WF1907-WF1907v
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 Button
6
19" LCD Color Monitor HP WF1907-WF1907v
3.3 Adjust the Picture
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19" LCD Color Monitor HP WF1907-WF1907v
8
19" LCD Color Monitor HP WF1907-WF1907v
9
19" LCD Color Monitor HP WF1907-WF1907v
4. Input/Output Specification
4.1 Input Signal Connector
4.1.1 D-SUB connector
Pin Signal Pin Signal
1 Red Video 9 3.3/+5 V (from PC)
2 Green Video 10 Sync Ground
3 Blue Video 11 None
4 None 12 DDC Data
5 Ground (DDC Return) 13 Horizontal Sync
6 Red GND 14 Vertical Sync
7 Green GND 15 DDC Clock
8 Blue GND
4.1.2 DVI-D connector
PI N NO. DESCRIPTION PI N NO. DESCRIPTION
1.
2.
3.
4.
5.
6.
7.
TMDS data 2－
TMDS data 2＋
TMDS data 2/4 Shield
TMDS data 4－
TMDS data 4＋
DDC Clock
DDC Data 19. TMDS data 0/5 Shield
PIN 1
PIN 11
VGA connector layout
13.
14.
15.
16.
17.
18.
PIN 5
TMDS data 3＋
＋5V Power
GND(return for +5v,hsync,vsync)
Hot Plug Detect
TMDS data 0－
TMDS data 0＋
8.
9.
10.
11.
12.
Analog Vertical Sync 20.
TMDS data 1－
TMDS data 1＋
TMDS data 1/3 Shield 23. TMDS Clock +
TMDS data 3－
24 - Pin Color Display Signal Cable
21.
22. TMDS Clock Shield
24.
TMDS data 5－
TMDS data 5＋
TMDS Clock －
10
19" LCD Color Monitor HP WF1907-WF1907v
4.2 Factory Preset Display Modes
11
19" LCD Color Monitor HP WF1907-WF1907v
5. Panel Specification
5.1 General Feature
M190PW01 V0
M190A1-L07 C2
LTM190M2-L31
12
19" LCD Color Monitor HP WF1907-WF1907v
5.2 Optical Characteristics
M190PW01 V0
M190A1-L07 C2
13
19" LCD Color Monitor HP WF1907-WF1907v
LTM190M2-L31
14
19" LCD Color Monitor HP WF1907-WF1907v
5.3 Parameter guide line for CCFL Inverter
1.TFT LCD Module:
M190PW01 V0
M190A1-L07 C2
LTM190M2-L31
15
19" LCD Color Monitor HP WF1907-WF1907v
2.Back Light Unit:
M190PW01 V0
M190A1-L07 C2
LTM190M2-L31
16
19" LCD Color Monitor HP WF1907-WF1907v
6. Block diagram
6. 1 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
17
19" LCD Color Monitor HP WF1907-WF1907v
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 WF1907-WF1907v
(
)
(
)
(
)
6.2 Electrical Block Diagram
6.2.1 Scalar Board
Crystal (14.318MHz)
LCD interface
EEPROM
M24C16
(I308)
X301
(Include MCU, ADC, OSD)
H sync
V sync
RGB
D-Sub
Connector
(P302)
Scalar GM5726H-LF
I306
Connector
P306
DCLK+
DVID
(P303)
RGB
DCLK-
EEPROM
M24C02
(I304)
EEPROM
M24C02
(I305)
19
19" LCD Color Monitor HP WF1907-WF1907v
6.2.2 Inverter / Power Board
AC input
EMI filter
Bridge
Rectifier
and Filter
Start Circuit
PWM
Control IC
Transformer
Over
Voltage
Protect
Rectifier
diodes
12V
Feedback
Circuit
5V
Lamp
LC
Resonance
Transformer
MOSFET
Feedback
Circuit
Over
Voltage
PWM
Control IC
ON/OFF
Control
DIM
ON/OFF
20
19" LCD Color Monitor HP WF1907-WF1907v
7. Schematic
TOP
21
19" LCD Color Monitor HP WF1907-WF1907v
POWER
22
19" LCD Color Monitor HP WF1907-WF1907v
VGA＆ DDC INTERFACE
23
19" LCD Color Monitor HP WF1907-WF1907v
DVI＆ DDC INTERFACE
24
19" LCD Color Monitor HP WF1907-WF1907v
SCALER GM5726H
25
19" LCD Color Monitor HP WF1907-WF1907v
KEY＆ PANEL INTERFACE
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19" LCD Color Monitor HP WF1907-WF1907v
AUDIO
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19" LCD Color Monitor HP WF1907-WF1907v
Function Key BD
28
19" LCD Color Monitor HP WF1907-WF1907v
Power KEY BD
29
19" LCD Color Monitor HP WF1907-WF1907v
8. PCB Layout
8.1 Main Board
30
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