Sony DVW-790WS/790WSP, DVW-709WS/709WSP manual Upper Drum Eccentricity Adjustment

4-2. Parts Replacement

8.Upper Drum Eccentricity Adjustment

(1) Slowly turn the upper drum assembly counter- clockwise and for one turn check that the indi- cated deflection of a gauge meets the follow- ing specification.

Specification : Within 3 um

If the specification did not meet, repeat the fol- lowing three steps and adjust until the specifi- cation meets.

(a)Slowly turn the upper drum assembly counterclockwise and check the maxi- mum and minimum value of the indicated deflections.

(b)Turn the upper drum assembly until the minimum deflection value indicates.

(c)From the end opposite of the prove press the upper drum assembly in the direction of the arrow so that the indicated deflec- tion is half way between maximum and minimum value.

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If the indicated deflection did not move when pressing the upper drum assembly by finger, loosen the four screws that secure the upper drum assembly.

If the indicated deflection easily moved when pressing, tighten the screws a little.

	Press in this direction.	Upper drum
Upper drum eccentricity		assembly
adjustment tool
	3
	1	2
	4

(2)Set the torque screwdriver to 9.8 x 10_2 N.m {1 kgf.cm}. Put the torque screwdriver in the four holes on the board of the upper drum as- sembly. Tighten the four screws in the se- quence shown in the figure.

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When tightening the screws just after the ec- centricity adjustment, be sure to tighten them to 9.8 x10_2 N.m {1 kgf.cm}.

(3)Set the torque screwdriver to 24.5 x10_2 N.m {2.5 kgf.cm}.

(4)Tighten the four screws in the same sequence as in step 2.

(5)Re-check that the specification met.

9.Upper Drum Eccentricity Adjustment Tool Removal

Remove the upper drum eccentricity adjustment

4-14 DVW-790WS/709WS/707

DVW-790WSP/709WSP/707P P2V1