LC-42XD1E (serv.man4). Adjustment Procedure - Sharp TV Service Manual (repair manual). Page 11

     LC-42XD1E/RU

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4. Tuner adjustment

Adjustment gradation values (IN) appear on page 7/13 of process adjustment, and adjustment initial values (offset value) appear on pages 8/13 and
9/13. 

For white balance adjustment, adjust the offset values on pages 8/13 and 9/13.

[Condition of the unit for inspection]

 Modulated light: MAX (+8)

[Adjustment reference device]

Minolta CA-210

[Adjustment]

Check that the values on page 7/13 of process adjustment are set as below. If not, change them accordingly.

1. Display the current adjustment status at point 6. (Page 8/13 of process adjustment)

The display for checking the adjustment status is toggled by pressing the “6” button on the remote control.

(Normal OSD display 

→ “6” → display for check (OSD disappears) → “6” →normal OSD display → . . . )

2. Read the value of the luminance meter. x=0.272, y =0.277

3. Change MGAMMA R6/MGAMMA B6 (Adjustment offset value) on page 9/13 of process adjustment so that the values of the luminance meter

approach x=0.272 and y =0.277.

(Basically, G is not changed. If adjustment fails with R and B, change G. When G is lowered, the weaker of R and B must be fixed.)

4. Display the adjustment status of the current point 5. (Each time the “5” button on the remote control is pressed, the adjustment status check dis-

play is toggled.)

(Normal OSD display 

→ “5” → Check display (OSD disappears) → “5” →Normal OSD display → . . . )

Change M GAMMA R5/M GAMMA B5 (adjustment offset value) on page 9/13 of process adjustment so that the values of the luminance meter
approach x = 0.272 and y = 0.277.

5. Repeat step 4) for points 4, 3, 2, and 1.

MGAMMA POS 1

4

MGAMMA POS 2

9

MGAMMA POS 3

14

MGAMMA POS 4

19

MGAMMA POS 5

24

MGAMMA POS 6

29

1 Setting

[Signal]
PAL
PAL sprit colour bar

䊶Feed the RF signal (PAL colour bar) to TUNER.

RF signal

䊶Make sure㵘the PAL colour bar pattern (E-12) has㩷the sync level of

㵘7:3 with the picture level.

[Terminal]
TUNER

㸡100% white

2

Auto adjustment

Adjustment process

Bring the cursor on [

TUNER ADJ]

and press [OK].

performance

Page3.

[

TUNER ADJ

OK] appears when finished.

Adjustment point Adjustment conditions

䈀E-12CH䈁

Adjustment procedure