Sharp SX68JF100 Service Manual page 10

FOCUS ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions
1 Receive E-5CH (Monoscope Pattern).
1 Dynamic focus
2 With the remote controller, make it normal.
adjustment
3 Connect the synchroscope to the eight pins of
L1680
(in the power T1680.
4 Turning L1680, adjust the amplitude of the hori-
unit)
zontal frequency waveform to 600Vp-p.
1 Receive E-5CH (Monoscope Pattern).
2 Focus
2 With the remote controller, make the image
adjustment
FBT FOCUS-VR normal.
3 Adjust the focus VR-1 to make the horizontal
(in the power
unit) line around character "325" at left-top position
as fine as possible.
4 Adjust the focus VR-2 to make the vertical line
around character "325" at left-top position as
fine as possible.
5 Repeat Items 3 and 4 once again, adjust the
focus.
Waveform and others
600 ± 20Vp-p
10-1
HORIZONTAL/VERTICAL CIRCUIT ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions
1 Main screen
adjustment
V-AMP50 Adjust the overscan to 8.5%. (E-5)
V-LINE50 Adjust the linearity to the best.
V-S-CORR50 Already preset. (Adjust this unless the linearity
is achieved.)
V-CENT50 Align the center of the screen to the geometric
center of CRT. (E-5)
H-CENT50 Align the center of the screen to the geometric
center of CRT. (E-5)
H-SIZE50 Adjust the overscan to 8.5%. (E-5)
E/W-PAR Look at the first vertical line from the right end of
the crosshatch pattern. Adjust the data so that
the four cells just on the left of this vertical line be
straight down. (Fig. 10) (E-2)
EW-COR Look at the first vertical line from the right end of
the crosshatch pattern. Adjust the data so that
the lower half of this vertical line be straight down.
(Fig. 11) (E-2)
TRAPE Look at the first vertical line from the right end of
the crosshatch pattern. Adjust the data so that
the distance D1 (between the first line's center
and the screen edge) and the distance D2 (be-
tween the first line's bottom and the screen edge)
be the same. (Fig. 12) (E-2)
V-COM Already preset. (Adjust if the quality is specially
poor.)
H-COM Already preset. (Adjust if the quality is specially
poor.)
V-BIAS Already preset. (Adjust if the quality is specially
poor.)
V- COR Already preset. (Adjust if the quality is specially
poor.)
OTHER On the items of V-AMP60, V-LINE60, V S-CORR60,
V-CENT60, H-CENT60 and H-SIZE60, the compen-
sation data is automatically input if the 50Hz mode
adjustment is
done.
I 2 C BUS
adjustment
Waveform and others
The receiving channel in ( ) are
the following signals.
(E-2): Crosshatch (50Hz)
(E-5): Monoscope (50Hz)
Fig. 10
Fig. 11
Fig. 12
However, if it is largely deviated
when it is checked in the 60Hz
mode, readjust it in the 60Hz mode.
10-2
D1
D2