JVC MXG78V
Manual de Servicio

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

< 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 / recording & eraser 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. Remove the flexible P.C.board from the chassis base. 5. Remove the spring "a" from behind the playback / recording head. 6. Loosen the reversing azimuth screw retaining the playback head. 7. Take out the playback head from the front of the head mount. 8. The recording and eraser heads should also be removed similarly according to Steps 1~7 above.

Cassette mechanism

Flywheel R

Head mount

Trigger arm (Mechanism A side)

Fig.1

Playback/Recording & eraser head Flexible P.C.board

Spring "a" Trigger arm

Reassembling the playback, recording and eraser heads (See Fig.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 as shown in Fig.3. 5. The recording and eraser heads should also be reassembled similarly according to Steps 1~4 above.

CN301 Head amplifier & mechanism control P.C. board Flywheel R

Fig.2

(Mechanism A side)

Playback head

Reversing azimuth screw Head mount Flexible P.C.board CN302

Spring "a"

FPC holder

Head amplifier & mechanism control

Fig.3

P.C. board (Mechanism B side)

1-26