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GY-2120WD/WS
7. Install the Upper Drum Assembly
n
When replacing the upper drum of this model, it
is not necessary to do an eccentricity adjustment
of the upper drum.
(1) Adjust the position of the hole (A) on DR-
340 board with positioning pin on the upper
drum cover. (Fig. 1)
(2) Put the upper drum assembly on the central
shaft of the lower drum gently while keeping
the state of (1).
m
1.
Never hold the claws of the upper drum
cover when installing the upper drum
assembly.
2.
Be careful not to touch the AT head,
peripheral tape guides and drum support
when installing the upper drum assembly.
3.
Do not turn the upper drum while the
upper drum cover is installed.
(3) Press the claws of the upper drum cover in
the direction indicated by the arrows and
raise the upper drum cover up, then remove
it.
(4) Push the central portion of the upper drum
down by finger, and place the upper drum on
the flange of the lower drum surely.
(5) Tighten the four screws in the sequence
shown on the board cover gradually while
keeping the state of (4).
Tightening torque : 39.2
x
10
_
2
N
.
m
(4.0 kgf
.
cm)
(6) Tighten the four screws in the same sequence
as in step (5) using a torque screwdriver.
Tightening torque : 78.5
x
10
_
2
N
.
m
(8.0 kgf
.
cm)
3-3. Drum Block
Install the Upper Drum Assembly
<Fig.1>
.....
Remove the upper drum cover
DR-340 board
Frange
Positioning pin
Upper drum cover (top view)
Align
• Lower drum
• Upper drum assembly
Hole (A)
Board cover
Claw
Claw
Upper drum cover
Summary of Contents for GY-2120WD
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Page 224: ......
Page 437: ...7 3 GY 2120WD WS Index Mechanical Deck Overall Block 6 7 9 8 2 1 3 4 5 ...
Page 469: ...8 1 GY 2120WD WS 8 1 Section 8 Block Diagrams Frame Wiring ...
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