Sanyo MCD-Z250F Service Manual page 6

REPLACEMENT OF CD MECHANISM
c. Replacement and lubrication of the pickup
Before replacement of the pickup, be sure to carefully read the
section regarding the pickup when the unit is moved or
transported.
(1)
.
(2)
.
(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 FLOIL (G-474B) 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.
CM6
r 1
I
@
@
I
~ [+
—--i
(short) (open)
40)
I
I
d. Checking the action of the CD mechanism e. Replaceme- of the sled motor
(1) Disconnect the socket (for the sfed motor
power
supply) from (1)
Remove two Srew
(CY1 ) and
remove the sled motor
(CM3).
the P.W. Board.
(2) Apply a voltage of DC 2.OV to the sled
motor's terminal.
(3) Measure the current during sled motor
operation.
The direction of movement of the. pickup (outer groove or inner
groove) can changed by changing the battery polarity.
c
(4)
The current during
sled motor action varies according to the
positional relationship of gear @fvf5,
CM6).
(5) If the current exceeds 40mA, remove the gears (CM5, CM6).
(6) Apply a small amount of a FLO[fL (G-474B) bonding materials
to the shaft.
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