Sony GY-8240UWD Maintenance Manual page 104

3-3. Drum Assembly Replacement
5. Installing the Drum Assembly
(1) Hold the drum assembly as shown in the
figure and connect the three harnesses
disconnected in (6) of step 3.
m
. Hold the drum support, not to hold the upper
drum and the brush slip ring assembly.
. Pay attention to the orientation of the
connectors.
(2) Align the two positioning holes of the drum
assembly with the two positioning pins of the
MD base assembly while pulling up the drum
harnesses shown in the figure.
m
. Avoid pulling the drum harnesses forcibly, or
the harnesses may come off the drum assembly.
. Be careful not to touch the CTL/TC head
and tape guide at that time.
. Be careful not to put the harnesses between
the lower drum and the MD base assembly.
(3) Confirm that the drum assembly is firmly
inserted into the positioning pins.
(4) Rotate the upper drum manually counterclock-
wise and align the upper drum assembly holes
with the fixing screw position.
(5) Tighten the screw temporarily.
(6) Tighten other two screws temporarily in the
same way in steps (4) and (5).
(7) Tighten the three screws in turns counter-
clockwise for each by two or three turns.
Tightening torque: 78.4 x 10
{8 kgf.cm}
(8) Fix the drum harnesses at the leaf spring (2),
then install with the two screws.
6. Connecting the Flexible Card Wire
Connect the flexible card wire into the connector
CN2 on the HN-258 board, then lock.
7. Cleaning
Clean the portions below.
(1) Upper drum's tape running surface and rotary
heads. (Refer to Section 2-2-2.)
(2) Lower drum's tape running surface and lead
surface. (Refer to Section 2-2-3.)
n
After cleaning, wipe with a dry cleaning cloth.
3-18
. When connecting the connectors
Drum harness
. When installing the drum assembly
_2
N.m
C3 x 8
Drum assembly
Fixing screw
120˚
Drum assembly
Fixing screw
Flexible card wire
Tightening torque : 78.4 x 10
Install the Drum Assembly
Leaf spring (2)
PSW3 x 6
Drum harnesses
Positioning pins
Fixing screw
120˚
120˚
HN-258 board
C3 x 8
CN2
_2
N.m {8 kgf.cm}
GY-8240UWD
GY-8240FC