ii
REPLACEMENT OF CD MECHANISM
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Note that the mechanism of the CD p!ayer is very delicate.
It is very important that the spindle motor (which rotates the disc), and the sled motor (which cases the disc signals to~e
tracked), as well as the gear and other components, operate srmooth[y, without eccelentrlcity.
When handling the pickup, take care not io exert excessive force, and particular care should be taken not to touch the lens
or the drive circuit’s P. W. Board pattern.
1. Replacement of the spindle motor
.First, prepare the new turntable (C M3-2) and new special
washer (C M3-4) for replacement. CM3-2
The reimoved turntable will be deformed by the heat of the
soldering iron, and cannot be reused. .
.Prepare dial type calipers.
(l) The attached bonding material can be dissolved by using a
60 Wsoldering iron to heat the shaft at the under part of :~&
the iurniable (CM3-2) for about one minute.
(2) The turntable can then be removed from the shaft by very
carefully applying force upward at the center of the lower v
surface of the turntable.
(3) Remove the two screws (CM3-3) and remove the spindle
motor (CM3-5).
(4) Attach the special washer (CM3-4) to the spindle motor.
I(5) Apply asmall amount of amixture of the “Three Bond
2001 and 2015F” bonding materials to the molor’s shaft.
(6) Initial the turntable as shown in the figure. Secure ihe iurn-
table 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 bonding mater Ial
at the top of ;haft.
Ii
u u
*
——— 11.0
*0.lmm
\-
1I
‘CM2
(SHAFT)
-fru-
2. Confirm of inclination for the turntable
(l) Connect the digital voltmeter as shown in the figure.
(2) Set the test disc (YEDS 18 =SONY or etc.), press the
PLAY button (Playback for the most inner music).
(3)At this time, record voltage value to indicaie at the digital
voltmeter.
(4) Access the most outer music, press the PLAY button
(Playback for the most outer music).
(5) Again at this time, record vollage value to ind!cate at the
digital voltmeter.
Be sure to wipe away
the bonding material.
\CHUCKPULLEY
+
~~*
—+
CM3-2
(TuRN
TABLE)—CM3-5
t(SPINDLE
MOTORSHAFT)
-F+ +
10 kohm
Unit Digital
0.0033PF Voltmeter
Vc Low Pass Filter
(6) For reference at the recorded voltage of the most inner
music, Confirm at f300 mV less than for recorded voltage
of the most outer music
-5-
