ELECTRICAL ADJUSTMENTS

2-13: TINT

1.Receive the NTSC color bar pattern. (Audio Video Input)

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

3.Connect the oscilloscope to TP024.

4.Activate the adjustment mode display of Fig. 1-1and press the channel button (20) on the remote control to select "TINT".

5.Press the VOL. +/- button on the remote control until the section "A" becomes a straight line. (Refer to Fig. 2-2)

"A"

Fig. 2-2

2-14: CONTRAST CENT

1.Activate the adjustment mode display of Fig. 1-1and press the channel button (22) on the remote control to select "CONTRAST CENT".

2.Press the VOL. +/- button on the remote control until the contrast step No. becomes "35".

3.Receive a broadcast and check if the picture is normal.

4.Set to the AV mode. Then perform the above adjustments 1~3.

2-15: Confirmation of Fixed Value (Step No.)

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

NO. FUNCTION

RF

AV

02

AGC GAIN

00

---

04

R CUTOFF

00

---

06

G CUTOFF

00

---

07

B DRIVE

45

---

09

V POSI (50)

08

---

10

V POSI (60)

00

---

18

BRIGHT MAX

40

40

19

BRIGHT MIN

09

09

20

TINT

32

ADJ.

21

SHARP

02

02

23

CONTRAST MAX

50

50

24

CONTRAST MIN

10

10

26

COLOR MAX

50

50

27

COLOR MIN

10

10

30

M B CUT OFF

127

---

31

CVBS OUT

31

---

32

APR THRESHOLD

00

---

33

BELL FILTER

10

---

34

BANDPASS

00

---

35

H POSI OSD

118

---

36

V POSI OSD

50

---

37

H POSI TEXT

122

---

38

V POSI TEXT

58

---

*To check for the fixed values of the RF (60Hz), indicate the adjustment mode screen while input the 60Hz video signal.

D-3

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Dell 21N21E2 service manual Contrast Cent, NO. Function