Download  Print this page

Sanyo MCD-Z250F Service Manual page 5

Hide thumbs

Advertisement

i
REPLACEMENT
OF CD MECHANISM
o Note that the mechanism
of the CD player is very delicate.
Q It is very impo?tant that the spindle motor (witch rotates the disc), and the sled motor (which cases the disc signals to be tracked), as
well as the gear and other components,
operate smoothly, without eccentricity.
When handling
the pickup,
take
care not to exert excessive force, and particular care should be taken not to touch the lens or the
drive
circuit's
P.W.Board
pattern.
a. Replacement
of the spindle
motor
s
First, prepare the new turntable
(CM1 -2) and new special washer
(CM I AI) for replacement.
The removed
turntable
will be deformed
by the heat of the
soldering iron, and cannot be reused.
Prepare dial type calipers.
(1)
(2)
(3)
(4)
(5)
(6)
b.
(1)
(2)
(3)
(4)
(5)
(6)
The attached
bonding
material
can be dissolved
by
using
a
60W soldering
iron to heat the shaft at the under part of the
turntable (CM1-2) for about one minute.
The turntable
can then be removed
from the shaft by very
carefully appfying force upward at the center of the lower surface
of the turntable.
Remove the two screws (CM1 -3) and remove the spindle motor
(CM1-5).
Attach the special washer (CM1 +) to the spindle motor.
Apply a small amount
of a mixture of the "Three Bond 2001
and 201 5F" bonding
materials
to the motor's shaft.
Initial the turntable as shown in the figure. Secure the turntable
by pressing gently.
Be
sure to
wipe away (by using a price
of
cloth, or similar material)
any bonding material coming out of
the hole.
Don' t
attached
bondin9
material
atthetcoofshaft.
-+$+
Bondhg material
CM14
I
SPECIAL WASHER
————
8-10mm
~--
-
CM1-1
GD-
.
CM1-2
?k-c"'"
Be sure to wipe away
the bonding material.
\
n—————i
~cm
I
I
SHAFT
'"'-'w
Ll-
Confirm of inclination
for the turntable
Connect the digital voltmeter
as shown in the figure.
Set the test disc (YEDS1 8), press the PLAY button (Playback
for the most inner music).
At this time,
record
voltage
value to indicate
at the digital
voltmeter.
Access the most outer music, press the PL4Y button (Playback
for the most outer music).
Again at this time, record voftage value to indicate at the digital
voltmeter.
For reference at the recorded voltage of the most inner music,
confirm at * 300mV less than for recorded voltage of the most
outer music.
J
E
Unit
J+
A
T
CM1-2
TURN TABLE
CHUCK
PULLY
~
r
CM 1-5
I SPINDLE
MOTOR
I
SHAFT
1
1
1
1
I
Low Pass Filter
-4-

Advertisement

loading

  Related Manuals for Sanyo MCD-Z250F