Sharp LC-15B2H, Руководство по обслуживанию

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10
LC-15B2H
LC-15B2M
[5] Adjustment
5-1. +B adjustment...R3760 and a half fixations VOL
1) Receive the colour bar signal.
2) Adjust the voltage of the pin (38) of SC3403 to 5.00±0.02V.
Note: Since 5.0V is a reference voltage of all power voltage, adjust it precisely.
5-2. Counter-bias adjustment...Page 2 COM BIAS
Vary the "COM BIAS" setting on Page 2 of the adjustment process so that the contrast be sharpest (black looks
most sinking). The adjustment guideline is around 39.
5-3. TAMP adjustment
1) Receive the colour bar signal.
2) When reading value of adjustment process the page 2 "Y" is not within value of the bottom table, the adjustment
of "NTSC TAMP" of the same page is done, and reading value of "Y" is made to be within value of "B8" to
"C2".
3) If the adjustment of "NTSC TAMP" is executed, write its adjustment value to the followings manually.
"PAL TAMP"
"SECAM TAMP"
"PAL-M TAMP"
"PAL-N TAMP"
(Screen of the page 2 of the adjustment processing menu OSD)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
2
C O M B I A S 3 9
N T S C T A M P 2 4
P A L T A M P 2 4
S E C A M T A M P 2 4
P A L - M T A M P 2 4
P A L - N T A M P 2 4
G C U T O F F
R C U T O F F
0
–
5
B C U T O F
T A M P H
F
G 3 B 3 R 3 0 0 0 0 0 0
– 1
G 1 B 4 Y 0 0 0 0 B E
C 2
T A M P L B 8
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Y Data
(White 75%)
5-4. White balance adjustment
1) Receive the monoscope pattern signal.
2) Adjust "RCUTOFF" and "BCUTOFF" on the page 2 of the adjustment processing so as to obtain the colour of
the same level as the standard set.
Caution: For the adjustment processing of "RCUTOFF" and "BCUTOFF", adjust them in the indication value
range of ... –9, –7, ... –1, +1, ... +7, +9.
When it becomes even-numbered value, side favor noise sometimes occurs in the monochrome signal of the
specific gradation.