instructions for NSM CDM 12 player.
This procedure is recommended to be carried out in a workshop.
The mechanism of the CDM PRO module consists of delicate optical, mechanical
and electrical components; therefore, proper handling measures have to
avoid damage to the laser by Electro Static Discharges(ESD),
service technicians and operators should be grounded during handling.
Excessive mechanical forces on any part should be avoided.
Storage in dusty, high temperature and high humidity environments should
Never touch the lens with your fingers, and avoid spoiling the lens with
grease from the mechanical parts.
Work in a clean environment.
The Optical Pick Up unit has been carefully adjusted during manufacturing.
Avoid touching this part. Do not disassemble. Do not readjust.
Always use proper tools to handle the unit.
Fast heating up (e.g. by bringing the mechanism from a cold place into
a warm and humid room) can result in moisture condensing on the lens,
thus influencing the playability for a certain time.
Before checking the performances, the mechanism should stabilize to climatic
conditions for at least 4 hours.
WARNING: INVISIBLE LASER RADIATION. AVOID DIRECT EXPOSURE TO THE LASER
BEAM. THE LASER BEAM CAN DAMAGE THE HUMAN EYE.
No. 6 driver
T10-Torx No. 10 driver
PCB-CD decoder and driver board mounted under
Before you begin, please have the following ready.
Electro conductive mat over workbench or a hand grounding wrist
No. 6 Torx Driver (T6)
No. 10 Torx Driver (T10)
Small Flat Screwdriver
Small Tweezers or small Needle nose pliers
Small Wire Cutter
2 Low Lint Cotton Swabs or Anti-static Foam Swabs
Krytox GLP-204 Performance Lubricant made by DuPont (substitute for
factory recommended Tribol 9890 lubricant)
Small Bend Tweezers
reading these instructions, if you still do not feel comfortable
repairing the player, please no not despair it is not the end of
world, it will just cost you more. Send the unit to us for the service.
For the purpose of demonstration, we used a NSM CDM 12 player with
legs and springs as used in ROWE/AMI jukeboxes.
the player lens facing down and
remove the 4 Torx no.10 screws holding the PCB.
you carefully lift the PCB, you will see two flex foil harnesses
attached to the PCB. The smaller one controls the motor and the
larger one controls the data. With a small flat screwdriver lift
the latches on both sides of the connector, while holding the flex
foil harness. Slide the harness out. Do not pull on the harness
forcefully. They should already be loose.
the PCB aside and place the player lens facing down. When working
with the player, be careful not to push the hub on the motor all
the way down. It will touch the casing, which will result in friction,
thereby preventing the motor from spinning. Remove the torx screw
no. 6 holding sledge motor retaining clip. Lift the motor just
enough for the worm gear to clear the idler gear. Carefully position
the chip lifter tool under the idler gear and lift it, put it aside.
your hand move the OP on the sledge several times to the feel how
easy it moves and finally position it to the left to clear
the large gearwheel. Position the chip lifter under the large
gearwheel as close to the center as possible and lift the gear.
come up directly from the shaft. (In our demonstration the gearwheel
came out with the shaft attached.)
the T6, remove the screws holding the retaining clips, while securing
the sledge guidance shaft of the OP on both sides.
the sledge guidance shaft of the OP on both sides at the same time
and slide the top sledge actuator spring out of the sledge guidance
plane and remove the old OP.
the old player aside. Familiarize yourself with the old OP. Pay
close attention to this part of the OP. It is a spring-loaded toothed
bar. During removal, if you are not careful it could possibly disengage
this little wire-spring. If this happens, carefully reinstall it
with the tweezers. You will need to compress this bar during installation
process. You do not have to worry about this OP, since this OP
is going to be discarded anyway.
the new OP from the box. There are a few subtle differences between
these two assemblies. You will remove the OP from this assembly.
With your finger rotate the worm gear attached to the sledge motor
pushing it softly down until the OP moves about a ½ inch
from the starting position. (Approximately into the middle of the
sledge guidance shaft.) This assembly is securing the lateral shaft
by mechanical stoppers. Use tweezers or a flat screwdriver to remove
these stoppers and discard them.
simplify the removal and prevent damage to the OP, cut the upper
sledge guidance plane with wire cutters (see the picture) on both
sides, carefully moving it away from OP. Remove the OP. Inspect
the OP and make sure it slides freely on the shaft. You can discard
this assembly or use it for additional spare parts. The
turntable motor is compatible and should be used also. Please see
the Service folder for turntable replacement service instructions.
the CDM 12 players are older units, it is important to follow this
the original CDM 12 for wear and tear. With a clean low lint cotton
swab, wipe all exposed lubrication points of old grease and dirt.
Discard the cotton swab. Make sure no cotton fibers remain on gears
and rails. Lubricate the player according to the Factory Instructions
at this link,
using Krytox GLP-204 performance lubricant available from Video Amusement
or factory recommended Tribol 9890 grease.
the OP into the player. Insert the actuator sledge spring into
the sledge guidance plane first and than insert the shaft into
both holders. Reassemble the shaft holders. Tweezers work the best
in this process. Touch the shaft as little as possible; it has
all the needed lubrication. If you need to reapply lubrication
avoid excessive greasing.
CAUTION: This is
the most critical part of the whole repair. Slide the OP all the
way to the left to install the large gearwheel. Position the large
gearwheel on the shaft, but do not push all the way down yet! You
do not want to damage the black toothed bar on the OP. Carefully
with tweezers push the toothed bar about 1/16 away from the large
gearwheel. While pushing the toothed gear, push the larger gearwheel
all the way down until you feel a soft snap. So not apply excessive
force! The large gearwheel cannot touch the casing of the player.
Slide the OP on the sledge several times to make sure it is not dragging
and feels the same as in step 3.
the old lubricant from the sledge motor worm gear, idler wheel
and large gearwheel. Reinstall the idler wheel. Do not reverse
position. See the image for the proper direction of installation.
Add one dot of lubricant between pivot spring and sledge motor
worm gear. Reinstall the sledge motor and secure it with the clip
holder. Apply small amount of lubricant between the motor worm
gear, idler wheel and large gearwheel.
the ESD clip from the OP flex foil harness and discard. Take the
PCB and reinsert the flex foil harness into the connector. Insert
it all the way down and push the lock down to secure the harness
on both sides. Repeat with the other harness. Mount the PCB back
to the player. CONGRATULATIONS, you are finished.
Install the unit into the jukebox and test it. When installing the
NSM player into the jukebox, pay close attention to all washers needed
to properly level the player. There are special test CDs, you can use
to thoroughly test the performance of the player. The easiest way to
test it is to play the 1st and last song of the CD. If the player works
you are done.