Sharp SX68JS10, Service Manual

Page: 11 / 62

11
SX68JS10
CUT OFF, BKGD ADJUSTMENT METHOD
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 CRT CUT OFF
Service mode
I
2
C bus data
adjustment
1
Receive E-5CH (Monoscope pattern).
2
Select P-NORM with the remote controller.
3
Turn on the service SW, and select the CUT
OFF BKGD mode.
4
Select the screen VR 0/10.
5
Press “-/--” key of the remote controller to se-
lect the lateral in-line mode.
9
Turn the screen VR clockwise, and adjust the
first lighting lateral in-line raster to slightly light.
0
Adjust the CUT OFF data of two other colours,
and coarsely adjust the lateral in-line to become
white. (Note 1)
q
Turn the screen VR in the opposite direction to
the point where the lateral in-line raster goes
out.
Note 1: Apply the adjustment after aging with
the beam current 1500
±
50
µ
A or
more for 30 minutes or more.
w
Press “-/--” key of the remote controller to se-
lect the normal mode.
1
E-5CH (Monoscope pattern) is received.
2
Select P-NOM with the remote controller.
3
Connect the beam ammeter between TP1601
and TP1602.
4
Coarsely adjust the beam current to approx.
1.7 mA with R1633 (sub-contrast VR).
5
Receive the window pattern with AV input.
(PAL burst is generated with the signal
generator.)
6
With the data of G-drive and B-drive, adjust the
colour temperature 12,300K of the white peak
to white.
7
Adjust the right dark area of the window to
12,300K with R-cut off, G-cut off and B-cut off.
8
Readjust the colour temperature at the white
peak.
9
Check 12,300K at the low white.
Note 1 : Apply this adjustment after aging
with the beam current 1,500
±
50
µ
A
or more for 30 minutes or more.
(On the white or green monocolour
screen)
On the monocolour screen of white
or green
Note 1 :
R CUT OFF UP
"1" KEY
DOWN "4" KEY
G CUT OFF UP "2" KEY
DOWN "5" KEY
B CUT OFF UP "3" KEY
DOWN "6" KEY
Data up/down is possible with the
above comparison.
* 12300
°
K X : 0.272
Y : 0.275
(With Minolta colour thermometer
CA-100)
Note 1 :
G-DRIVE
UP "7" KEY
DOWN " " KEY
B-DRIVE UP "8" KEY
DOWN "0" KEY
Data up/down is possible with the
above comparison.
* The colour temperature is based on
the shipment initial setting table.
2-1 White balance
background
I
2
C bus adjust-
ment
(RF Signal)
1
The window pattern is received with DVD sig-
nal (component signal).
2
Apply the adjustment in the same manner as
2-1
5
and subsequence above. (12,300K)
(G-DRIVE, B-DRIVE, R-CUTOFF, G-CUT-
OFF, B-CUTOFF)
Apply the adjustment after the end of 2-1.
Note 2 : Use the window pattern of
the signal generator for
adjustment.
(PAL and colour burst are present.)
Note 3 : Signal generator of 2-1, 2-2
use
"SX-1006"
2-2 * White balance
background
I
2 C BUS adjust-
ment (DVD
signal)