3-6
SIIA Chassis
3-6. CONVERGENCE ADJUSTMENT
1. Input the dot pattern signal.
Set CONTRAST to the position at which it can be seen
clearly.
Set BRIGHTNESS to MIN.
2. Align the R, G, B dots in the horizontal direction at the
center of the screen using RV703 (H-STAT).
Note: If H-CENT was changed after adjusting H-
STAT, adjust H-STAT again. (The H-
STAT can be changed by the H-CENT
switch.)
3. Align the top and bottom of R, G, B at the center of the
screen using the V-STAT (vertical static convergence)
magnets.
Note: After the V-STAT adjustment, always
paint the magnets to lock.
While maintaining the V-STAT magnet knobs A and B
at the same angle (I = I'), adjust the top and bottom
convergences. If A and B are asymmetrical (I = I'), it
will have a negative effect; the focus may not be
accurate, or the beam striking may occur.
4. For HMC, use a 6-pole magnet and adjust so that the R
and B dots are symmetrical at the left and right sides in
respect to the G dot.
5. For VMC, use a 6-pole magnet to adjust so that the R
and B dots are symmetrical above and below the G dot.
6. Repeat steps 2 to 5 until the convergence becomes
correct.
Note: Adjusting the convergence may affect the
landing. Therefore be sure to check the
landing again after completing this
adjustment.
7. After adjusting, paint each magnet to lock them.
14-inch
20-inch
II'
A
B
X
Y
Good example
II'
A
B
X
Y
Bad example
Fixed
(Bottom section)
(Top section)
RBG
6-pole magnet
Perform the VMC
adjustment by rotating the
6-pole magnet to the left
and right without changing
the opening of it.
Adjust so that the displacement
of the dot is equal at the top
and bottom.
BMC magnet
Purity
V.STAT convergence magnet
BMC magnet
Purity
V.STAT convergence magnet
II'
A
B
6-pole magnet
Perform the HMC adjustment
by changing the opening of
the 6-pole magnet.
A A'
BGR
Adjust the 6-pole magnet so
that A = A'. While maintaining
the I and I' angles equal,
adjust the 6-pole magnet.
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