Color Uniformity Adjustment - Hitachi ed-s3170 Service Manual

ED-S3170
ED-X3270

4-6 Color uniformity adjustment

Preparations
1. Perform these adjustments after the white balance
adjustment described in Section 4-5.
2. Make a color uniformity adjustment for the
following four tones.
MIN tone (approx. 4% input signal)
MID-L tone (approx. 14% input signal)
MID-H tone (approx. 25% input signal)
MAX tone (approx. 57% input signal)
3. Place the cursor on the tone to be adjusted in the
Adjust menu and press the [
the Adjust Tone menu at the bottom of the screen.
Select the major adjustment lattice point No. and
color, and then adjust them.
4. The major adjustment lattice point numbers (a total
of 17 points) corresponds to the major adjustment
lattice point positions in the diagram on the right.
The color uniformity of the entire screen can be
adjusted by adjusting the white balance for each of
the points starting in order from the low numbers.
5. Adjustment point No.1 should not be adjusted,
because it controls the brightness of the entire
screen.
Adjust menu
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Adjust Tone menu
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6. To temporarily turn correction off, place the cursor
on "ON" in the Adjust Tone menu and press the [ ]
key. To turn it on again, place the cursor on OFF in
the Adjust Tone menu and press the [ ] key.
7. Although this adjustment can also be made using
internal signals, we will here use the [MENU
SELECT] key on the Remote control transmitter to
select the following two signals.
Solid monochrome adjustment color (use G color
adjustment when a color differential meter is
used).
Solid white (use for adjustment other than
above).
8. Reset color-shading correction before adjustment.
When 4 tones and all colors are to be reset,
place the cursor on [C.UNIF.] in the Adjustment
menu, press the [RESET] key and select
[DEFAULT].
When only 1 tone is to be reset, place the cursor
on the tone to be reset, press the [RESET] key
and select [DEFAULT].
Single tone and monochrome resets cannot be
performed.
Major adjustment lattice point position
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