ELE-29
5-10. Highlight Clip Adjustment
BOARD
PRE AMP, PRE PROCESS
TP
TP102[R] (PRE PROCESS)
TP302[G] (PRE PROCESS)
TP502[B] (PRE PROCESS)
ADJUST
VR103[R CLIP] (PRE AMP)
VR203[G CLIP] (PRE AMP)
VR303[B CLIP] (PRE AMP)
F.NUMBER
-
MODE
Gray Scale Chart (2000Lux)
M. EQ.
Oscilloscope, WFM
SPEC.
A = more than 3000mV
(more than 450%)
B = less than 3 IRE
1. Set EVR as shown below.
COM:[1E] DATA:[3A] ADR:[00] [Enter]
2. Set the ABB SW to PRESET position and execute
ABB.
3. Connect an oscilloscope to
TP102 (R), TP302 (G),
TP502 (B)
on the PRE PROCESS and adjust
VR103 (R_CLIP), VR203 (G_CLIP), VR303
(B_CLIP)
on the PRE AMP so that the saturation
blurs (curve) is disappeared with iris open
condition.
If there is no saturation blurs, turn the each VR to
clipped direction so that signal is just changed to
small.
And then, confirm the each signal level (R,G,B) to
find the lowest channel in level. Then adjust higher
channels VR to the signal level of lowest channel.
Confirm the level
"A"
is in the specification.
4. Set the iris position to F11. Then turn the iris to
open side slowly. When the upper 3 steps of
grayscale chart are become flat, stop the iris.
5. Confirm the CAM OUT signal by WFM so that
carrier level "B" is in the specification. If it is not,
adjust two VRs, which is selected except lowest
level channel in the item 3.
6. Confirm that the carrier level
"B"
is in the
specification again.
Note:
1. If carrier portion "B" has bias, adjust each VR so
that the all portion become evenly.
2. Observe with WFM gain to X10 mode.
B
B
Saturation Blurs
A
Clip Saturation Blurs
CAM OUT
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