Focus Adjustment; Rotation Adjustment - Ikegami HTM-1505R Operation Manual

c) Adjustment procedure - 2 -In case of component signal-
()) Input Signal
Input 100% color bar signal into
YPbPrinput.
Fig. 4-10-4 100% color bar signal
®
Initialization
Fill the screen with blue signal alone by means of SCREEN switch.
* When the screen is bright, it is ditticult to discriminate lumimmce
difference. Therefore, darken the circumference as much as
possible and lower the brightness to such a degree that blue signal
can be seen a little. Consequently, more accurate setting can be
accomplished.
@ AdjustmentofCHROMA
Adjust all portions of "a" to "d" shown in Fig. 4-10-4 to the same
brightness.
When input signal is 75% color bar signal (portion "a": I 00%,
portions "b" to "d": 75%), adjust all po1tions "b" to "d" to the
same brightness.
(5) Focus adjustment
a) About the focus
Fig. 4-10-5 Flyback transformer
For HTM-1505 R/CS, adjust the focus with FOCUS 2 (static
focus) alone shown in Fig. 4-10-5.
b) Note
As the flyback transformer generates high voltage of 25kV to
supply to CRT, never touch it with the hand. (Except when it is
adjusted by a serviceman.)
When adjusting, be care/lil not to touch any other prut thru1 the
controller.
c) Adjustment procedure
CD
Initialization
Tum off power supply and remove the top cover of the monitor.
Tum on power supply again ru1d perform heat
11m
for about 20
minute.
®
Input Signal
Select a fine signal that indicates characters on the whole screen, or
a character signal of the built-in test signal.
@ Adjustment of Focus
Aqjust so that the focus may be optimal by meruis of FOCUS 2
shown in Fig. 4-10-5.
HTM-1505R/HTM-1505CS
(6) Rotation adjustment
a) About the rotation
Rotation corTects the change of purity of CRT that is produced by
the influence of earth magnetism, when the direction of monitor is
changed.
When the installation place is changed, perform this adjustment.
b) Adjustment procedure
CD
Initialization
Press DEGAUSS switch to demagnetize CRT.
®
lnputSignal
Select a white signal of about 50% to whiten the whole screen
uniformly or a 50% full flat of the built-in test signal
@ AdjustrnentofROTATiON
-1. Fill the screen with red alone by pressing SCREEN switch (Red).
-2. Adjust ROTATION so that the uniformity of white of the screen
may be optimal.
-3. Also check for the purity of green and blue.
37