Adjusting The Rotation; Adjusting The Screen Center; Adjusting The Screen Distortion - Ikegami HTM-1517R Operation Manual

(6) 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-white inter-
nal TEST signal.
③ Adjusting ROTATION
1. Press the R.SCREEN switch to set the screen to
red only.
2. Adjust ROTATION to the optimum purity of the
screen (evenly white).
3. Check also about the purity of green and blue.
(7) Adjusting the screen centering
a) Screen center
Use the following three controls when centering
the screen.
Different data can be set for the respective signal
formats.
MK.PHASE
Adjust the marker position so that the image and
100% marker phase match.
* Different data is set for each format.
H.CENT
Adjust the horizontal deflection in relation to the
escutcheon frame (CRT frame) so that the marker
comes to the center of the frame.
* Different data is set for each format. In the case
of HDTV signal, different data is set also for 16:9
and HD 4:3 SCAN.
V.CENT
Adjust the vertical deflection in relation to the es-
cutcheon frame (CRT frame) so that the marker
comes to the center of the frame.
* Different data is set for each format.
b) Precautions
As the MK.PHASE and H/V.CENT settings are
stored as the data for each signal format, do not
perform the following operations during the set-
ting.
Performing any of the switching below will call the
data in a different format and clear the data you
are now working on.
Switching channels
Changing input signal format
Switching SCAN
Switching ASPECT
c) Adjustment procedure
Perform the following adjustment once for each sig-
nal format.
① Input signal
Check the MENU 1 format is set properly to the
signal format to be changed.
For details of the format setting, refer to 4.7(3) in
this manual.
The input signal should be the one, such as
monoscope signal, which can display video on the
whole active screen area.
② Adjusting H.CENT/V.CENT
1. Set the size to NORMAL using the SCAN switch.
2. Set the MARKER switch to ON, and display the
10-division crosshatch.
3. Adjust the horizontal direction using H.CENT and
the vertical direction using V.CENT so that the top,
bottom, left and right of the marker are equally
spaced with respect to the escutcheon frame.
4. Before switching to UNDER SCAN using the
SCAN switch in the adjustment below, press the
CHANGE PRESET switch to store the data.
〈NG〉
③ Adjusting MK.PHASE
1. Set to UNDER SCAN using the SCAN switch.
2. Display the 100% marker using the MARKER
switch.
3. Adjust the phase using the MK.PHASE so that the
frame of the image matches the 100% marker.
< NG >
④ To change the settings in ② and ③, together with
other modifications, for a different format, first
press the CHANGE PRESET switch to save the
data and then switch the signal to a different
format.

(8) Adjusting the screen distortion

a) Screen distortion
The SIDE PIN and TRAPEZOID controls are pro-
vided to adjust the screen distortion.
Pressing the EXPAND switch executes these ad-
justments alternately.
These two preset data can be set differently for
each signal format. In the case of HDTV signal,
different data is set also for 16:9 and HD 4:3 SCAN.
30
B
B
A A
〈OK〉
< OK >