6-20
DVW-250/250P
6-4. Upper Drum Assembly Replacement
9. Upper drum eccentricity gauge
removal
Remove the upper drum eccentricity gauge.
10. Solder the leads of slip ring assembly
Solder the three leads of the slip ring assembly.
(Refer to “6-3. Slip Ring Assembly Replace-
ment”.)
11. Brush assembly installation
Install the brush assembly.
(Refer to “6-2. Brush Replacement”.)
12. Brush cover installation
Install the brush cover.
(Refer to “6-2. Brush Replacement”.)
13. Cleaning of video heads and tape
running surfaces
Clean the following area using a cleaning cloth
moistened with cleaning fluid.
• Video heads (Refer to “5-1. Cleaning”.)
• Tape running surface of the upper drum
(Refer to “5-1. Cleaning”.)
• Tape running surface and lead of the lower
drum (Refer to “5-1. Cleaning”.)
n
After cleaning, be sure to wipe the relevant area
using a dry cleaning cloth.
Adjustments after replacement
14. Tape path adjustment
(Refer to Section 7-1-1.)
15. Servo system adjustment
(Refer to Section 9-3.)
16. RF system adjustment
(Refer to Section 9-5-1., and 9-5-4 to 9-5-13.)