Iiyama Vision Master Pro 451, Руководство по обслуживанию

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1-27. ITC (Integrated Tube Component) adjustments
The following ITC adjustments should be made only when a new picture tube is installed, or convergence is poor.
All set-up adjustments above-mentioned must be completed before any further ITC adjustment is attempted.
Receive an entire white raster signal and turn ON the Power Switch. Perform adjustment after a warm-up of at least
an hour.
Perform the following adjustments by setting H-convergence and V-convergence to center indication.
Notes: See Chapter 5 concerning parts list for the ITC adjustments.
*
PURITY MAGNET should not be turned during the ITC adjustments.
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1-27-1. LANDING correction
1)
Degauss the entire screen with degausser.
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See "EXTERNAL DEGAUSS".
Select DEGAUSS and press the MENU Button.
Receive an entire green signal.
Adjust the horizontal size to make it full-scan.
Apply the landing meter to TL (top-left), TR (top-right), BL (bottom-left) and
BR (bottom-right) in the right hand side figure.
Confirm that "H" reading of the landing meter is within ±20% at each point.
Adjust rrc with the front buttons so that the "H" reading difference between
T (top) and B (bottom) in the right hand side figure is as follows: | T-B | =
±3%.
Adjust Bottom-right, Top-right, Top-left and Bottom-left respectively with
the front buttons so that "H" reading of the landing meter at each point is
as follows:
TL: –8 to –2% TR: +2 to +8% BL/BR: –3 to +3%
Landing meter setting:
Mode Select Switch: Monitor Normal
Note: Mode Select Switch should be set before turning on the power switch of the landing meter.
Volt: 2V
Time: 50ms
Gain: 7
Unit: % for LND-070, 0.8µm (1%=0.8µm) for LND-072
l
l
l
l
l
TL TR
BR BL
B
T
20mm
20mm
< Top view > < Side view >
2)
3)
4)
5)
6)
7)
8)
9)
Face the CRT screen to east and set it vertically.
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CRT face
PURITY MAGNET*
4-POLE MAGNET
6-POLE MAGNET
BOW MAGNET
DEFLECTION
YOKE
SEPARATOR
DIFFERENTIAL
COIL
X
V
LOCKING RING
+
+
X
V
TRD
Y
V(a)
+
Y
h(t)