Tape Transport In The Fast Forward Mode - Sony AV-3420CE Service Manual

9-6. TAPE TRANSPORT IN THE FAST-
FORWARD MODE
In the fast-forward mode full take-up torque
is applied to the Take-Up Reel Table and the Tape
Tension Servo is released. The fast-forward mode
is shown in Fig. 9-7.
9-6-1. Take-Up Reel Table Drive
When the function lever is set to fast forward,
the Function Select Cam is turned to its fully
counterclockwise position, pushing the FF Push
Rod in the direction indicated by the arrow. The
end of the FF Push Rod pushes up the Pulley Arm
so that the Take-Up Pulley supplies drive to the
Take-Up Reel Table.
9-6-2. Tape Tension Servo Release
When the Function Select Cam is rotated fully
counterclockwise, as above, the FF Sub Cam is
rotated counterclockwise, rotating the Pinch Roller
Release Arm counterclockwise at @). The Tension
Regulator Release Rod, connected at the center of
the Pinch Roller Release Arm, is pulled down,
pivoting the Tension Regulator Release Arm slightly
clockwise. This rotates the Tension Arm counter-
clockwise at (), thus releasing the Band Brake.
The Switch Push Rod, connected at the end of the
Pinch Roller Release Arm, is pulled down at the
same time and actuates S4.
@) supply reel table
S4
(3)
switch push rod
@ take-up reel table
O4] +
\ (ll=/@ tension arm
y a
tension regulator
release arm-~~
@ take-up reel table
(©) fast forward link
@0 pinch roller
@i) capstan
@2) pinch roller lever (A)
function select cam \y
©
@?) function lever
@
Fig. 9-7 Fast forward mode tape transport
9-7