Ikegami HTM-1917R, Operation Manual

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(4) Adjusting the color balance
a) Color balance
For the component signal (YPbPr/RGB), adjust the
color balance using CHROMA only. If the NTSC
decoder module DE-801 is mounted, input NTSC
composite signal, and adjust the color balance us-
ing HUE/CHROMA.
b) Adjustment procedure 1 (NTSC composite signal)
① Input signal
Input SMPTE color bar signal or the NTSC 75%
color bar signal similar to it.
② Starting
Set the screen to blue only using the SCREEN
switch.
* As the luminance difference is hard to discern
when the screen is bright, dim the surroundings
as much as practical and lower the BRIGHTNESS
manually until the blue signal is slightly visible.
This will help make more accurate adjustment.
③
Adjusting HUE
Adjust HUE so that the parts a to d in Fig. 4-6-
3 become the same brightness.
If they do no become the same brightness, set to
the optimum state, and next adjust CHROMA.
④ Adjusting CHROMA
Adjust CHROMA so that the parts e to h in Fig.
4-6-3 become the same brightness.
If they do no become the same brightness, set to
the optimum state, and adjust the HUE as de-
scribed in step 3.
⑤ Repeat adjustments ③ and ④ until a to h be-
come the same brightness.
c) Adjustment procedure 2 (Component signal)
①
Input signal
Input the 100% color bar signal to the YPbPr in-
put.
②
Starting
Set the screen to blue only using the SCREEN
switch.
* As the luminance difference is hard to discern
when the screen is bright, dim the surroundings
as much as practical and lower the BRIGHTNESS
manually until the blue signal is slightly visible.
This will help make more accurate adjustment.
③ Adjusting CHROMA
Adjust CHROMA so that the parts a to d in Fig.
4-6-4 become the same brightness.
If the input signal is 75% color bar signal ( a is
100% white and the parts b to d are 75%), ad-
just CHROMA so that the parts b to d become
the same brightness.
(5) Adjusting the rotation
a) Rotation
ROTATION is the control for correcting changes
in the purity caused by geomagnetic effects on the
CRT which occur when the monitor is rotated.
Perform this adjustment every time the monitor is
relocated.
b) Adjustment procedure
①
Starting
Press the DEGAUSS switch to demagnetize the
CRT.
②
Input signal
Select a 50% white signal, which makes the entire
screen evenly white, or the 50% full-flat internal
TEST signal.
③ Adjusting ROTATION
Press the R.SCREEN switch to set the screen to
red only.
Adjust ROTATION to the optimum purity of the
screen (evenly red).
Check also about the purity of green and blue.
Blue
e a c g
f b d h
Black
Fig. 4-6-3. NTSC 75% Color Bar Signal
a b c d
Fig. 4-6-4. 100% Color Bar Signal