JVC HR-S3800U Service Manual page 22

(4) While swinging the lock levers (R) and (L) of the cassette
holder assembly toward the front, slide the cassette
holder assembly until its legs come to where the guide
rail and the roller cam assembly have been removed (so
that the drive arm is upright). (See Fig.2-2-4.)
Cassette holder assembly
Fig. 2-2-4
(5) While holding the left side of the cassette holder, lift the
cassette holder assembly so that the three legs on the
left side are all released. Then pull the legs A and B
on the right side out of the rail and also pull up the leg
C . (See Fig.2-2-5 and Fig.2-2-6.)
Cassette holder assembly
Fig. 2-2-5
Drive arm
Lock lever (L)
(Upright)
Leg Legs
Cassette holder assembly
Fig. 2-2-6
(6) Draw out the drive gear, and remove the drive arm.
Drive arm
Hole
Hole
Drive gear
1
2
Fig. 2-2-7
A
B
C
Main deck right side
Drive arm
A
B
2-8