Sony GY-8240UWD Maintenance Manual page 98

3-2. Upper Drum Assembly Replacement
5. Installing the Upper Drum Assembly
n
When replacing the upper drum of this model, it
is not necessary to make an eccentricity adjust-
ment of the upper drum.
(1) Align the hole (A) in DR-340 board with the
positioning pin on the upper drum cover.
(Fig. 1)
(2) Put the upper drum assembly on the lower
drum gently with the central shaft of lower
drum and the central hole of upper drum
aligned, while keeping the state of (1).
m
. Never hold the claws of the upper drum
cover when installing the upper drum
assembly.
. Be careful not to touch the CTL/TC head,
peripheral tape guides and drum support
when installing the upper drum assembly.
. Do not turn the upper drum with the upper
drum cover is attached to.
(3) Press the claws of the upper drum cover in
the direction indicated by the arrows and
remove it.
(4) Push the central portion of the upper drum
down by finger, and press the upper drum
against the flange of the lower drum surely.
(5) Tighten temporarily the four screws in the
order shown on the board cover while
keeping the state of (4).
Tightening torque : 39.2 x 10
{4.0 kgf.cm}
(6) Tighten securely the four screws in the same
order in step (5) using a torque screwdriver.
Tightening torque : 58.8 x 10
{6.0 kgf.cm}
3-12
< Fig1 >
. Remove the upper drum cover
_2
N.m
_2
N.m
. Lower drum
DR-340 board
Flange
Hole (A)
claw
Upper drum cover
Install the Upper Drum Assembly
. Upper drum assembly
Upper drum cover (top view)
Positioning pin
Align
claw
Board cover
GY-8240UWD
GY-8240FC