Iiyama Vision Master Pro 451, Service Manual

Page: 19 / 74

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Receive a red and blue cross-hatch signal.
Adjust the 4-POLE MAGNET so that red and blue beams converge on the
center cross lines.
Add green to the red and blue cross-hatch signal.
Adjust the 6-POLE MAGNET so that red and blue beams converge with
green beam on the center cross lines.
Repeat the adjustment until red, blue and green beams converge each
other.
Fix the 4-POLE MAGNET and the 6-POLE MAGNET by turning the
LOCKING RING.
Mark the 4-POLE MAGNET and the 6-POLE MAGNET with paint marker
(090Z029A01) so that adjusted position is understandable.
1-27-3. STATIC CONVERGENCE adjustment
1)
2)
3)
4)
5)
6)
7)
R
B
R B
G
R,B
G R,B
R,G,B
R,G,B
1-27-4. BOW MAGNET adjustment
1)
2)
3)
4)
Receive a red and blue cross-hatch signal.
Adjust the BOW MAGNET so as to straighten an arched horizontal line.
Note: Must be careful not to misconverge vertical lines by this adjustment.
Perform the 1-29-3. STATIC CONVERGENCE adjustment so as to converge
the red and blue lines.
Fix the BOW MAGNET with paint (090Z020A01).
R
B
R
B
1-27-5. DIFFERENTIAL COIL adjustment (XV adjustment)
1)
2)
Receive a red and blue cross-hatch signal.
Adjust the DIFFERENTIAL COIL so that the horizontal cross line converge
each other.
R
B
R,B
1)
2)
Receive a cross-hatch inverted signal.
Adjust the specified TRD volume so that the picture distortion is corrected.
1-27-2. TRD adjustment
Notes: 1. This adjustment should be performed only when the picture
distortion in the right hand side figure is permitted.
2. Be sure to perform the 1-27-6. YV (a) adjustment after
this adjustment because the convergence adjusted by YV
volume is changed at the same time during this adjustment.
Picture
Bezel
Picture
Picture