HP WF1907, WF107v Service manual

19" LCD Color Monitor HP WF1907-WF1907v

Service

Horizontal Frequency

24-83 kHz

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

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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

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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

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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 －

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19" LCD Color Monitor HP WF1907-WF1907v

4.2 Factory Preset Display Modes

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19" LCD Color Monitor HP WF1907-WF1907v

5. Panel Specification

5.1 General Feature

M190PW01 V0

M190A1-L07 C2

LTM190M2-L31

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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

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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

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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

Y

14

15

Y

N

16

Y

17

18

N

19

Y

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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)

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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

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19" LCD Color Monitor HP WF1907-WF1907v

7. Schematic

TOP

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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

27

19" LCD Color Monitor HP WF1907-WF1907v

Function Key BD

28

19" LCD Color Monitor HP WF1907-WF1907v

Power KEY BD

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19" LCD Color Monitor HP WF1907-WF1907v

8. PCB Layout

8.1 Main Board

30