akira PTV-50H08, Руководство по обслуживанию

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a
b
Projection tube screen side
Projection tube electron gun side
4-pole magnetic shee
ｔ
for electric beam shap
ｅ
2-pole
magnetic for
electron
beams
Specification:
0.9 a/b 1.1
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13
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Model No.: PTV-50H08
Version: 1.0
DCU Phase Data Setting
Preparation of Adjustment:
1 The screen control CUT OFF adjustment has been finished.
2 Receive the PAL signal 100I, the NTSC signal 60P and the YPRPB component signal.
Adjustment Procedure:
1 Press Key SK01 on the focus and convergence plate to enter the status of convergence adjustment.
2 Press Key L-CH on the remote controller to enter the status of phase determination mode, see
Annexed tables 1, 2 and 3.
3 Alter the phase data according to those in the tables. (Annexed tables 1, 2 and 3).
4 Press Key L-CH to exit the status of phase determining mode.
Adjustment of Beam Alignment
Preparation of Adjustment:
1 Turn on the TV set and age for more than 30 minutes.
2 The adjustment of raster inclination being finished, adjust the lens focusing roughly.
3 The contrast is set to maximum, and others to medium.
4 Receive the PAL video dot signal or the square signal.
Adjustment Procedure:
1 Cover the red and the blue projection tubes with lens covers to display the green raster only on the
screen.
2 Revolve the magnetic sheet of green projection tube for aligning the electric beam to the invalid
position as shown below.
3 Return the focusing potentiometer of the green projection tube on the focusing case
counterclockwise to the end, and confirm the central position of the defocused dot raster or the
square crossing dot raster on the screen as a standard position.
4 Turn the focusing potentiometer clockwise to maximum.
5 Revolve the two magnetic sheets for electric beam alignment to make the crossing center coincident
with the standard position confirmed in step (3).
6 Turn the focusing potentiometer counterclockwise to check if the center of the picture moves.
7 Repeat Steps 3 6 until the picture center does not move in step (6).
8 Adjust the electric beam alignment of the red tube and the blue tube with the same method as above.