HITACHI 50DX01B
Manual de Servicio

2.9 liorizontal AFC adjustment Adjustment preparation (1) Receive the reverse cross-hatch pattern signal. (Cross-hatch lines are black.) (2) Set CONTRAST to maximum BRIGHTNESS to center. (3) Lens focus should be completed. (4) Electrical focus should be coarse adjusted. (5) Dynamic convergence should be coarse adjusted. (6) Raster inclination should be completed. Adjustment procedure (I) Project only green color. Cover R & B lenses or short 2P mini connectors on CPT PW.B.�s. (2) Adjust H-size to minimum. RUL9 fully counterclockwise. (3) Adjust green centering magnet (located on DY) to shift picture left to display edge of raster.

Adjustment procedure (I) Adjust RUN3 so that top and bottom edge of crosshatch touch top and bottom edge of screen frame. (2) Note the position of the first horizontal crosshatch line. (3) Increase V size so that the horizontal lilne movesup 25mm.
25mn L f

ADJUST LINES TO EDGE OF SCREEN

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2.11 Horizontal

amplitude

adjustment

(RUL9)

Adjustment preparation (1) That same as items 2.10 (l)-(6). Adjustment procedure (1) Adjust RUL9 so that left and right edge of crosshatch touch left and right edge of screen frame. (2) Note position of first vertical crosshatch line. (3) Increase H size (RULS) so that the vertical line moves to the left 40mm.
40mm *II+

1/2h

bc e I= e 3

2/3!l

Note:

(1) If raster edge cannot be seen, adjust GHPin (RUGS) fully counterclockwise and GHL-Fin (RUG5) to its mechanical center. (2) Front and back porch of video should be equal. adjustment (RUN3)

2.10 Vertical amplitude

(4) Set the CONTRAST control to maximum and BRIGHTNESS control to center. (5) Apply cover to the R and B lenses or shortcircuit the 2P sub-mini plug pins on the R and B CPT P.W.B. and project only Green on the screen. (6) Set the GV-Center (RUN5) and GH-Center (RUNS) adjustment VRs to their mechanical center.

Adjustment preparation (1) Start adjustment more than 20 minutes after the power is turned on. (2) The pincushion distortion and the keystone distortion adjustment should have been completed. (3) Receive the crosshatch signal.

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ADJUST LINES TO EDGE OF SCREEN

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