Sony EVO-720P - Path Adjustment

3-17, Replacement of Rotary Upper Drum
Removal
) Remove the two hexagonal bolt screws @ and
remove the dynamic damper @. (See Fig. 7-45.)
) Remove all eight solders in section @ and confirm
that the board and the pins on the bottom can
move freely, using tweezers or the like, (See Fig.
7-45.)
3) Remove the two hexagonal bolt screws @. (See
' Fig. 7-45.)
4) Mount the supplied jig ® (Ref, No, J-10) on the
dynamic dampér’ mounting hole with the two
supplied screws @, and mount the supplied
hexagonal bolt screw @ on supplied jig @, then
remove the rotary upper drum @, (See Fig. 7-46.)
«Repair rotary upper drum assembly
DGR-12-R A-7049-121-A"
eet
@ Hexagonal bolt screws
2x2D
© Hexagonal , sae xe
bolt
screws
'
a
Washers
(2x8) — @ Dynamic damper
Rotary upper drum
vas ;
Washers
Fig. 7-45.
@ Supplied hexagonal
bolt screw
© Supplied screws
Jig ©
g
5
=
@ Rotary upper drum
Fig. 7-46,
2)
Mounting.
Clean the flange surface: and the surface of the
rotary upper drum. which contacts it, and confirm
that there is no dirt.or scratches.
Use jig @ (Ref. No.-J-10) to-line up rotary upper
drum @ and the positioning hole @, and lightly
insert the rotary upper drum. At this time,
" confirm that the pins stick up the hole of rotary
3)
4)
5)
6)
7)
Note:
upper drum board. Fix with tweezers if the pins
catch. (See Fig. 7-47.)
Remove jig @ and push the rotary upper drum
in by hand, lightly, (See Fig, 7-48,) When it is
not inserted all the way, tighten the two hexagonal
bolt screws @ alternately to temporarily fix it,
Insert jig @ into the positioning hole ® again and
confirm that-it goes in smoothly. If not, loosen
the two hexagonai bolt’ screws @ and adjust it
by inserting a clock screwdriver into the hole.
Tighten the two hexagonal ‘bolt: screws @.
Note :Be careful not to- tighten too much,
Solder the: pins in section @.. (See Fig, 7-45.)
Note :Be careful “that the solder does not go
under. the board.
Mount..the dynamic damper @with the two
hexagonal bolt screws @. (See Fig. 7-45.)
Note: Be careful not to tighten too much.
* Be careful not to mix up the hexagonal
bolt screws @ (22.7) and @ (2x5).
After mounting, be sure to perform 7-4, TAPE
PATH ADJUSTMENT,
© Rotary upper drum
® Positioning holes
Fig. 7-47.
Push lightly
—289—
Fig. 7-48.