Sanyo MCD-Z250F, Service Manual

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REPLACEMENT OF CD MECHANISM
c. Replacement and lubrication of the pickup
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Before replacement of the pickup, be sure to carefully read the
section regarding the pickup when the unit is moved or
transported.
(3)
.
Remove a pickup rail (CM2) with a driver from the bottom of
chassis.
When removing or inserting the pickup rail from or into chassis,
take care not to exert excessive force.
When the pickup is reconditioned of replaced, be sure to wipe
the rails clean and also apply a coating of (G-4748) to
there entire circumference and entire length.
When applying the grease, do not allow any grease to adhere
to any other parts.
Pass the pickup rail (CM2) through the new pickup (CM7).
The pickup P.W.Board pattern is “shorted”, as shown in the
figure, so that the new pickup will not be susceptible to the
effects of static.
Set the pattern to “open” after the pickup has been replaced.
(short)
(open)
d. Checking the action of the CD mechanism
e. Replacement of the sled motor
(1) Disconnect the socket (for the sled motor power supply) from
(1) Remove two screw and remove the sled motor (CM3).
the P.W.Board.
(2) Apply a voltage of DC to the sled motor’s terminal.
(3) Measure the current during sled motor operation.
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The direction of movement of the pickup (outer groove or inner
groove) can changed by changing the battery polarity.
(4) The current during sled motor action varies according to the
positional relationship of gear (CM5, CM6).
(5) If the current exceeds remove the gears (CM5, CM6).
(6) Apply a small amount of a FLOIL (G-4748) bonding materials
to the shaft.