JVC CA-MXJ270V, Service Manual

Page: 19 / 61

MX-J270V
1-19
< Cassette mechanism section >
Removing the playback, recording and eraser
heads (See Fig.1~3)
1. While shifting the trigger arms seen on the right
side of the head mount in the arrow direction,turn
the flywheel R in counterclockwise direction until
the head mount has gone out with a click
(See Fig. 1).
2. When the flywheel R is rotated in counterclockwise
direction, the playback head will be turned in
counterclockwise direction from the position in
Fig.2 to that in Fig.3.
3. At this position, disconnect the flexible P.C.board
(outgoing from the playback head) from the
connector CN301 on the head amp. and mechanism
control P.C. board.
4. After dismounting the FPC holder,remove the
flexible P.C.board.
5. Remove the flexible P.C.board from the chassis
base.
6. Remove the spring "a" from behind the playback
head.
7. Loosen the reversing azimuth screw retaining the
playback head.
8. Take out the playback head from the front of the
head mount.
9. The recording and eraser heads should also be
removed similarly according to Steps 1~8 above.
Reassembling the playback, recording
and eraser heads (See Fig.2,3)
1. Reassemble the playback head from the front of
the head mount to the position as shown in Fig.3.
2. Fix the reversing azimuth screw.
3. Set the spring a from behind the playback head.
4. Attach the flexible P.C.board to the chassis base,
and fix it with the FPC holder as shown in Fig.3.
5. The recording and eraser heads should also be
reassembled similarly according to Steps 1~4
above.
Cassette mechanism
Flywheel R
Trigger arm Head mount
(Mechanism A side)
(Mechanism A side)
Playback/Recording &
eraser head
Flexible
P.C.board
Spring "a"
Trigger arm
Head amplifier & mechanism
control P.C. board Flywheel R
CN301
Playback head
Reversing azimuth
screw
Head
mount
Flexible
P.C.board
Spring "a"
FPC holder
Head amplifier &
mechanism control
P.C. board
CN302
(Mechanism B side)
Fig.1
Fig.2
Fig.3