LC-42SA1E (serv.man2). Adjustment Procedure - Sharp TV Service Manual (repair manual). Page 15

    LC-42SA1E/RU

3 – 15

Adjustment gradation values (IN) appear on page 7/11 of process adjustment, and adjustment initial values (offset value) appear on pages 8/11 and
9/11. For white balance adjustment, adjust the offset values on pages 8/11 and 9/11.

[Condition of the unit for inspection]  Modulated light: MAX (+8)

[Adjustment reference device]  Minolta CA-210

[Adjustment]

Check that the values on page 7/11 of process adjustment are set as below. If not, change them accordingly.

1) Display the current adjustment status at point 6. (Page 8/11 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.

3) Change M GAMMA R6/M GAMMA  B6 (Adjustment offset value) on page 9/11 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) If G is changed in step 3),  change the values of M GAMMA G1-M GAMMA G5 on pages 8/11 and 9/11 of process adjustment as follows. When

not changed, go to step5).

Offset value of M GAMMA G1 = (Offset value of M GAMMA G6) * (160/960)

Offset value of M GAMMA G2 = (Offset value of M GAMMA G6) * (320/960)

Offset value of M GAMMA G3 = (Offset value of M GAMMA G6) * (480/960)

Offset value of M GAMMA G4 = (Offset value of M GAMMA G6) * (640/960)

Offset value of M GAMMA G5 = (Offset value of M GAMMA G6) * (800/960)

5) 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 9/11 of process adjustment so that the values of the luminance meter
approach x = 0.272 and y = 0.277.

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

[Adjustment reference standard value]

1

Setting

[Signal]
COMP15K, 50Hz
100% Full Field Colour Bar

[Terminal]
EXT4 COMPONENT IN

•Feed the COMPONENT 15K 100% full field colour bar signal (100%    
  colour saturation) to EXT4 COMPONENT IN.

2

Auto adjustment
performance

Adjustment process
Page4

Bring the cursor on [

COMP15K ADJ] and press [OK]

[

COMP15K ADJ  OK] appears when finished.

M GAMMA IN 1

160

M GAMMA IN 2

320

M GAMMA IN 3

480

M GAMMA IN 4

640

M GAMMA IN 5

800

M GAMMA IN 6

960

Adjustment spec    

±0.004

Inspection spec    

±0.006 (point 1)

Adjustment spec    

±0.002

Inspection spec    

±0.004 (Excluding the above-mentioned)

100% white

Black