Sony HDW-750 Maintenance Manual page 284

7-2. Upper Drum Assembly Replacement
9. Removing the upper drum assembly
(1) Remove the four hexagon cap screws secur-
ing the upper drum assembly.
(2) Remove the upper drum assembly in the
direction of the arrow.
n
After the upper drum assembly is removed,
be careful not to touch the upper edge of the
lower drum.
Installation
10. Cleaning the drum contact surface
(1) Clean the following places using a cleaning
cloth moistened with cleaning fluid.
. Flange of the lower drum assembly (Upper
drum mount surface)
. Tape running surface and rabbet guide of
the lower drum assembly
. Mount surface on the rear of the new upper
drum assembly
(2) Wipe the 20 round patterns of the LDR-28
board in the lower drum with dry cloth.
n
Never clean the round patterns with anything
moistened with cleaning cloth.
7-14
Upper drum assemlby (rear)
Mount surface (cleaning)
Lower drum assembly
Flange (cleaning)
Rabbet guide (cleaning)
Hexagon cap screws
Upper drum
assembly
Egde of the lower drum
LDR-28 board
Round patterns
Tape running surface
(cleaning)
HDW-750/750CE V1