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Sanyo MCD-Z250F Service Manual page 6

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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.
i
-5-

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