ELECTRICAL ADJUSTMENTS

1. ADJUSTMENT PROCEDURE

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.

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 damages to the IC and Transistor).

Prepare the following measurement tools for electrical adjustments.

1. Pattern Generator

On-Screen Display Adjustment

1.Set the VOLUME to minimum.

2.Press the VOL. DOWN button on the set and the channel button (9) on the remote control for more than

2 seconds to display adjustment mode on the screen as shown in Fig. 1-1.

TV FULL 480i

Function

 

03 R DRIVE (N)

14

 

Step No.

 

 

Fig. 1-1

3.Use the CH. UP/DOWN button or Channel button (0-9)on the remote control to select the options shown in Fig. 1-2.

4.Press the MENU SETUP button on the remote control to end the adjustments.

5.To display the adjustment screen for TV, AV, GAME, COMPONENT and DVD mode, press the INPUT ZOOM button on the remote control.

6.Receive the DIGITAL broadcasting.

7.To display the adjustment screen for DTV mode, select the digital channel.

8.Press the VOL.DOWN button on the set and the channel

(9) on the remote control for more than 2 seconds.

NO.

FUNCTION

NO.

FUNCTION

03

R DRIVE(N)

31

BAK LIGHT MIN

04

R CUT OFF(N)

32

BRIGHTNESS CENT

05

G DRIVE(N)

33

BRIGHTNESS MAX

06

G CUT OFF(N)

34

BRIGHTNESS MIN

07

B DRIVE(N)

35

TINT

08

B CUT OFF(N)

36

SHARP H1 MAX

09

R DRIVE(C)

37

SHARP H1 MIN

10

R CUT OFF(C)

38

SHARP H2 MAX

11

G DRIVE(C)

39

SHARP H2 MIN

12

G CUT OFF(C)

40

SHARP V1 MAX

13

B DRIVE(C)

41

SHARP V1 MIN

14

B CUT OFF(C)

42

CONTRAST CENTER

15

R DRIVE(W)

43

CONTRAST MAX

16

R CUT OFF(W)

44

CONTRAST MIN

17

G DRIVE(W)

45

COLOR CENTER

18

G CUT OFF(W)

46

COLOR MAX

19

B DRIVE(W)

47

COLOR MIN

20

B CUT OFF(W)

50

CONTRAST 40

29

BAK LIGHT CENT

 

 

30

BAK LIGHT MAX

 

 

Fig. 1-2

2. BASIC ADJUSTMENTS

2-1: WHITE BALANCE

1.Place the set in Aging Test for more than 20 minutes.

2.Receive the gray scale pattern from the Pattern Generator.

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

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

5.Activate the adjustment mode display of Fig. 1-2and press the channel button (03) on the remote control to select "R DRIVE(N)".

6.Press the CH. UP/DOWN button on the remote control to select the "R DRIVE (N)", "R CUT OFF (N)",

"B DRIVE (N)", "B CUT OFF (N)", "R DRIVE (C)", "R CUT OFF (C)", "B DRIVE (C)", "B CUT OFF (C)", "R DRIVE (W)","R CUT OFF (W), "B DRIVE (W)" or "B CUTOFF(W)".

7.Adjust the LEFT/RIGHT button on the remote control to whiten the R DRIVE (N), R CUT OFF (N),

B DRIVE (N), B CUT OFF (N), R DRIVE (C), R CUT OFF (C), B DRIVE (C), B CUT OFF (C),

R DRIVE (W) ,R CUT OFF (W), B DRIVE (W) and B CUTOFF(W) at each step tone sections equally.

8.Perform the above adjustments 6 and 7 until the white color is achieved.

D-1

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Toshiba 15LV505 service manual Electrical Adjustments, On-Screen Display Adjustment, White Balance