JVC MXD 752 CD etc compact audio unit
 

Uses "3 disc triple play , play & exchange" 3 drawers stacked over one
another and the CD deck on an elevator system to access them. Can anyone
point to explanation of the mechanics of this or as used in other models.
Uses 6 motors in all. The elevator looks like 2 steppers built inside
cylindrical cam actuators and a mode switch, 5 +5 traces to the motors and
10 way to limit/mode something.

JVC MXD 752 CD etc compact audio unit
 

"N_Cook" wrote in message
...
Uses "3 disc triple play , play & exchange" 3 drawers stacked over one
another and the CD deck on an elevator system to access them. Can anyone
point to explanation of the mechanics of this or as used in other models.
Uses 6 motors in all. The elevator looks like 2 steppers built inside
cylindrical cam actuators and a mode switch, 5 +5 traces to the motors and
10 way to limit/mode something.



The service manual has a full blown dismantling procedure for the changer
(which seems to be called a "CD Changer Mech Type VC3" , but no actual
description of how it works. I could send you the manual if you have an
account that could accept it, but last I recall, you were not broadband, so
a 15 meg pdf would take about a year for you to download ?? Contact me
off-group if you want to try to arrange something.

Arfa

JVC MXD 752 CD etc compact audio unit
 

the CD changer mechanics look the same as the older PC-XC10 , the active
electronics board is different.
5 wire mode switch inside each cam and separate 10 line connection for limit
switches. Cams driven by cog train from a standard DC motor each ,
elsewhere, so 4 motors only. One for trays and one for CD deck elevator.
Will try some DC on these motors and see what happens.

JVC MXD 752 CD etc compact audio unit
 

Arfa Daily wrote in message
...


"N_Cook" wrote in message
...
Uses "3 disc triple play , play & exchange" 3 drawers stacked over one
another and the CD deck on an elevator system to access them. Can anyone
point to explanation of the mechanics of this or as used in other
models.
Uses 6 motors in all. The elevator looks like 2 steppers built inside
cylindrical cam actuators and a mode switch, 5 +5 traces to the motors
and
10 way to limit/mode something.



The service manual has a full blown dismantling procedure for the changer
(which seems to be called a "CD Changer Mech Type VC3" , but no actual
description of how it works. I could send you the manual if you have an
account that could accept it, but last I recall, you were not broadband,
so
a 15 meg pdf would take about a year for you to download ?? Contact me
off-group if you want to try to arrange something.

Arfa


The XC10 has much the same info (or not), exploded views only. Desoldering
the 4 CD deck motor points and removing the main pcb along and knowing now
being able to power ordinary motors, outside the chassis, should ellicit
enough. When I get back to it.

Got bogged down with a massive German massager chair repair at the moment ,
that needs repairing and clearing , to give space - a priority.
2x2x5 foot leather-clad awkward heap.

JVC MXD 752 CD etc compact audio unit
 

Using 8V one motor powers the shift helical cam and the other moves drawer
and sub draws in and out and the CD deck up and down via a PTO linkage and
its helical cam. Limit switches work as well. Leaves just something wrong
with the mode sw or "cam switches" as JVC calls them. There is the matrix
for all those in the manual but to progress all that manually seems too
much.

JVC MXD 752 CD etc compact audio unit
 

could not find cause of intermittant lock-up of tray, so cut a neat hole in
the outer metal casing over the tray lock tabs that protrude outwards of the
deck section, perfectly safe area. Grommet strip edged around. Owner then
can manually unlock the tray and pull out the tray himself.