JVC GY-HD100E Service Manual page 68

Measuring
No. Item instruments &
Input signals
15 WHITE L/R Oscilloscope
OFFSET [B] Gray scale chart
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Oscilloscope
Monitor TV
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LINEARITY Oscilloscope
adjustment Gray scale chart
Measuring point (*)
Mode Adjustment parts (-)
Adjustment level (+)
* VIDEO OUT
ADJUST MENU
- Lens IRIS
+ Adjust such that the
100 % white portion
of the color bar and
the white portion of
the gray scale have
same level.
* VIDEO OUT
ADJUST MENU
- JOG dial
+ Eliminate the gap of
the H rate output
waveform, and no
line should be seen at
the center of the
monitor TV screen.
* VIDEO OUT
ADJUST MENU
- Lens Iris
+ The level difference
between left and
right should be
maximum
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* VIDEO OUT
- JOG dial
+ The step levels of left
and right should be
the same.
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Adjustment procedure
(1) Adjust the lens iris so that the white level on
the gray scale chart is specified value.
(2) Press the USER 1/2 button to select ADJUST
MENU No. 38 "WHITE OFFSET (B)".
(3) Rotate the JOG dial to the specified value.
(4) Press the JOG dial to store the adjustment data.
(1) Press the USER 1/2 button to select ADJUST
MENU No. 225 "RESET START (B)L".
(2) While shooting the gray scale chart, set the
Lens iris so that the video out level is specified
value.
(3) Rotate the JOG dial to the specified value.
(4) Press the JOG dial to store the adjustment data.
NOTE:
When the adjustment cannot be made,
change the value of ADJUST MENU No. 230
"RESET START [B]R", readjust (1) to (4) such
that the level difference becomes minimum.
(5) When the adjustments of No. WHITE OFFSET
and No. LINEARITY cannot be made, change
the setting of ADJUST MENU No. 224 "H1
STOP (G)R" to the sequence as shown below
and readjust the 2 adjustments above.
Initial setting "5" → "6" → "7" → "4".
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