14DLV75 14-inch LCD TV/DVD COMBINATION SERVICE MANUAL

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14DLV75 14-inch LCD TV/DVD COMBINATION SERVICE MANUAL | Manualzz

ELECTRICAL ADJUSTMENTS

1.

BEFORE MAKING ELECTRICAL

ADJUSTMENTS

Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies.

CAUTION

• Use an isolation transformer when performing any service on this chassis.

• Before removing the anode cap, discharge electricity because it contains high voltage.

• When removing a PCB or related component, after unfastening or changing a wire, be sure to put the wire back in its original position.

• When you exchange IC and Transistor with a heat sink, apply silicon grease on the contact section of the heat sink.

Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damage to the IC and Transistor).

Prepare the following measurement tools for electrical adjustments.

1. Oscilloscope

2. AC Voltmeter

3. Pattern Generator

4. Multi-Sound Signal Generator

On-Screen Display Adjustment

1.

2.

Set the VOLUME to minimum.

Press the VOL. DOWN button on the set and the Channel button (9) on the remote control for more than 1 second to appear the adjustment mode on the screen as shown in Fig. 1-1.

DRI1 C

DRI2 C

MD6 C

DTHON C

DRREF C

RCUT2 C

GCUT2 C

BCUT2 C

GAINR C

GAING C

GAINB C

RCUT W

GCUT W

BCUT W

FUNCTION

OSD

RCUT M

GCUT M

BCUT M

DRI1 M

DRI2 M

MD6 M

DTHON M

DRREF M

RCUT2 M

GCUT2 M

BCUT2 M

GAINR M

GAING M

GAINB M

RCUT C

GCUT C

BCUT C

29

30

31

32

33

24

25

26

27

28

34

35

36

37

19

20

21

22

23

14

15

16

17

18

09

10

11

12

13

NO.

01

07

08

Function

Step No.

01 OSD

15

TV

Fig. 1-1

3.

4.

5.

Use the Channel UP/DOWN button or Channel button (1-

0) on the remote control to select the options shown in

Fig. 1-2.

Press the TV MENU button on the remote control to end the adjustments.

To display the adjustment screen for AV mode, press the

INPUT SELECT button on the remote control to set to the

AV mode. And, to display the adjustment screen for DVD mode, press the TV/DVD button on the remote control to set to the DVD mode. Press the VOL.DOWN button on the set and the channel (9) on the remote control for more than 1 second.

51

52

53

54

55

46

47

48

49

50

41

42

43

44

45

NO.

38

39

40

61

62

63

64

65

56

57

58

59

60

66

67

68

FUNCTION

DRI1 W

DRI2 W

MD6 W

DTHON W

DRREF W

RCUT2 W

GCUT2 W

BCUT2 W

GAINR W

GAING W

GAINB W

BRI CEN

BRI MAX

BRI MIN

CON CEN

CON MAX

CON MIN

COL CEN

COL MAX

COL MIN

TIN CEN

TIN MAX

TIN MIN

SHA CEN

SHA MAX

SHA MIN

DIM

CR GAIN

CB GAIN

CR OFFS

CB OFFS

Fig. 1-2

2. BASIC ADJUSTMENTS

2-1: CONTRAST MAX

1.

2.

3.

4.

5.

6.

7.

Activate the adjustment mode display of Fig. 1-1 and press the channel button (53) on the remote control to select "CONT MAX".

Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "56".

Receive a broadcast and check if the picture is normal.

Press the INPUT SELECT button on the remote control to set to the AV mode.

Activate the adjustment mode display of Fig. 1-1 and press the channel button (53) on the remote control to select "CONT MAX".

Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "56".

Receive a broadcast and check if the picture is normal.

D-1

ELECTRICAL ADJUSTMENTS

2-2: WHITE BALANCE CS

NOTE: Adjust after performing CUT OFF adjustment.

1.

2.

3.

4.

5.

6.

7.

8.

9.

Place the set in Aging Test for more than 5 minutes.

Receive the gray scale pattern from the Pattern Generator.

Using the remote control, set the brightness and contrast to normal position.

Press the TV/DVD button on the remote control to set to the CS mode.

If the picture is too much green.Activate the adjustment mode display of Fig. 1-1 and press the channel button

(67) on the remote control to select “CR OFFS”.

Adjust the VOL. UP/DOWN button on the remote control to select the step up.

If the picture is too much red.Activate the adjustment mode display of Fig. 1-1 and press the channel button

(68) on the remote control to select “CB OFFS”.

Adjust the VOL. UP/DOWN button on the remote control to select the step down.

Perform the above adjustments 5 and 6 until the white color is achieved.

2-3: Confirmation of Fixed Value (Step No.)

Please check if the fixed values of each the adjustment items are set correctly referring below.

NO.

FUNCTION

58

59

60

61

62

53

54

55

56

57

48

49

50

51

52

43

44

45

46

47

63

64

65

66

67

68

38

39

40

41

42

33

34

35

36

37

28

29

30

31

32

23

24

25

26

27

18

19

20

21

22

13

14

15

16

17

01

07

08

09

10

11

12

DRI2 C

MD6 C

DTHON C

DRREF C

RCUT2 C

GCUT2 C

BCUT2 C

GAINR C

GAING C

GAINB C

RCUT W

GCUT W

BCUT W

DRI1 W

DRI2 W

MD6 W

DTHON W

DRREF W

RCUT2 W

GCUT2 W

OSD

RCUT M

GCUT M

BCUT M

DRI1 M

DRI2 M

MD6 M

DTHON M

DRREF M

RCUT2 M

GCUT2 M

BCUT2 M

GAINR M

GAING M

GAINB M

RCUT C

GCUT C

BCUT C

DRI1 C

BCUT2 W

GAINR W

GAING W

GAINB W

BRI CEN

BRI MAX

BRI MIN

CON CEN

CON MAX

CON MIN

COL CEN

COL MAX

COL MIN

TIN CEN

TIN MAX

TIN MIN

SHA CEN

SHA MAX

SHA MIN

DIM

CR GAIN

CB GAIN

CR OFFS

CB OFFS

(RF/AV/GAME/DVD/COMPONENT MODE)

46

7F

00

1E

35

51

10

8C

F0

00

35

74

90

30

30

6D

53

3F

4E

48

00

0

06

06

00

00

3F

3F

0

0

0

49

4C

79

7B

7C

0

5A

4D

3F

47

80

3F

3F

0

0

44

45

3F

79

7D

0

0

67

53

3F

STEP NO.

GAME

2A

79

DVD

2A

79

7C

7F

3F

3F

0

7C

7F

3F

3F

0

44

45

3F

79

7D

0

0

67

53

3F

3F

3F

0

0

0

49

4C

79

7B

7C

0

5A

4D

3F

47

80

3F

3F

0

0

4E

7F

00

1A

35

51

10

8A

F0

00

35

74

90

30

30

6D

53

3F

4E

48

00

0

00

00

00

00

53

10

8C

F0

00

35

71

90

30

30

6D

53

3F

4E

48

3F

3F

0

0

0

00

0

05

05

46

7F

00

1E

35

00

0D

49

4C

79

7B

7C

0

5A

4D

3F

47

80

3F

3F

0

0

44

45

3F

79

7D

3F

3F

0

0

0

67

53

3F

RF

2A

79

7C

7F

46

7F

00

1E

35

51

10

8C

F0

00

35

74

90

30

30

6D

53

3F

4E

48

00

0

06

06

00

00

3F

3F

0

0

0

49

4C

79

7B

7C

0

5A

4D

3F

47

80

3F

3F

0

0

44

45

3F

79

7D

0

0

67

53

3F

AV

2A

79

7C

7F

3F

3F

0

4C

7F

00

19

35

51

10

88

F0

00

35

73

90

30

30

6D

53

3F

4E

48

00

0

00

00

00

02

3F

3F

0

0

0

49

4C

79

7B

7C

0

5A

4D

3F

47

80

3F

3F

0

0

COMPONENT

2A

79

7C

7F

3F

3F

0

44

45

3F

79

7D

0

0

67

53

3F

D-2

ELECTRICAL ADJUSTMENTS

3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)

CD7001

BACK LIGHT

PCB

LCD PANEL

CD2601

DVD PCB

CP2301

CP2302

CP2601

CD701

CD501

LCD PCB

DVD DECK

CD103

CD102

CD807

CD804

J701

CP801

TU001

J3801

CP3803

CP102 CP103

CP104

CP3805

CP701

CP1001

CP2201

J702 J703 J704

J706

J708 J707J705

AV PCB

OS2201

CD2201

CP101

SIDE JACK PCB

SPEAKER

CD101

J1001

J792

J791

J790

REMOCON PCB

OPERATION PCB

D-3

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