JVC TK-AM200E, Руководство по обслуживанию, Страница: 12 / 64

2-3
Item Mode Adjustment steps
Measuring
instrument &
Input signals
No.
Measuring point (
*
)
Adjustment points (
-
)
Adjustment level (
+
)
Leave the dome cover attached during adjust-
ment.
(1) Adjust the R GAIN and B Gain alternately so
as to minimize the white carrier leak of the
gray scale.
If a vectorscope is used to perform this step,
raise the vectorscope gain and adjust it to
bring the noise to the center.
5 White balance
adjustment Oscilloscope or
vectorscope
Gray scale chart
*
VIDEO OUT
-
PAN/TILT control lever
+
Minimum carrier leak
+
Noise in to center
SERVICE MENU
ADJUST 1: R
GAIN
ADJUST 1: B
GAIN
< U model > < E model >
When the color bar chart is of the reflective type:
Leave the dome cover attached during adjustment.
(1) Adjust ALC LEVEL to set the white level of
the color bar to 100%.
(2) Move the cursor to C GAIN and adjust it so that
the red level of the color bar is as specified.
(3) Set the ALC LEVEL back to the original value.
6 C GAIN
adjustment Oscilloscope
Color bar chart
(Reflective type)
*
VIDEO OUT
-
PAN/TILT control lever
+
300 mVp-p
SERVICE MENU
ADJUST 1:
ALC LEVEL
ADJUST 1: C
GAIN
When the color bar chart is of the transmissive type:
Leave the dome cover attached during adjustment.
(1) Adjust ALC LEVEL to set the white level of
the color bar to 100%.
(2) Move the cursor to C GAIN and adjust it so
that the saturation of R (Red) in the
vectorscope is equal to that at the center of
the crosshairs. (Their phase angles do not
have to match.)
(3) Set the ALC LEVEL back to the original value.
Vectorscope
Color bar chart
(Transmissive type)
*
VIDEO OUT
-
PAN/TILT control lever
+
The saturation of R (Red)
in the vectorscope is
equal to that at the
center of the crosshairs.
SERVICE MENU
ADJUST 1:
ALC LEVEL
ADJUST 1: C
GAIN
R
< U model > < E model >