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アンプ Pioneer DC-X77ZのPDF サービスマニュアルをオンラインで閲覧またはダウンロードできます。Pioneer DC-X77Z 35 ページ。 Stereo double cassette tape deck amplifier
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3 . M E C H A N I C A L S E C T I O N O P E R A T I O N O U T L I N E
T a k e - u p
The operation outline of this unit is as follows:
l.
Operation selection system . . . . . There is no power
assist mechanism
2 .
D r i v i n g s y s t e m . . . . . I m o t o r b e l t d r i v e
3 .
H e a d . . . . . F i x e d h e a d
4.
Auto-stop system..... REC+PLAY and PLAY auto-
stop
5.
Operation system. . . . . Lever lock system
6 .
E J E C T s y s t e m . . . . . S T O P - E J E C T s y s t e m
The following will describe operations according to their
respective modes.
3 . 1 . S T O P M O D E
The head chassis assembly and the respective operation
levers come down to their specified positions and become
into stop mode when the respective switches are OFF.
3 . 2 . P L A Y M O D E
(l) When PLAY lever is pressed. the lock cam moves to
the left direction and the power supply switch is
turned ON. At the same time, the head chassis
assembly which is linked to the play lever is pushed
up to the specifred position with the head chassis
spring and the PLAY muting switch being turned
ON. In addition. the PLAY lever is locked with the
lock cam.
(2) At the same time, the head chassis. while rising
pushes up the pinch pressure contact spring within
the pinch roller arm to pressure contact the pinch
roller to the capstan and commences tape running
(3) At the same time, the PLAY idler is also pushed up
causing the take-up reel table to rotate and to begin
take-up of tape and becomes into PLAY mode.
Power supply switch
r e e l t a b l e s e e n
P L A Y i d l e r
f r o n t s i d e o f m e c h a n i s m
C a p s t a n
P i n c h r o l l e r a r m
H e a d c h a s s i s
s p n n g
P L A Y m u t i n g S W
P L A Y l e v e r
Pinch pressure
c o n t a c t s p f l n g
H e a d c h a s s i s a s s e m b l v
H e a d c h a s s i s a s s e m b l y
3 - 3 . P L A Y - S T O P O P E R A T I O N
Mechanically, it operates in reverse of the afore-
mentioned PLAY mode. (See Figs. 3-l and 3-2.)
(l) When STOP lever is pressed, the lock cam moves in
the left direction and releases the PLAY lever. At the
same time, the PLAY muting switch and power
supply switch are turned OFF.
(2) At the same time, the PLAY idler is pushed down
while the head chassis comes down, and the take'up
reel table stops as also the take.up of tape.
(3) At the same time, release the pressure contact of the
pinch roller and capstan by pushing up the pinch
pressure contact spring and stop the tape running
3-4. PLAY-PAUSE mode-PAUSE release
o P A U S E m o d e
(l) When the PAUSE lever is pressed in PL,AY mode,
the PAUSE lever pushes down the head chassis
assembly (linked to pinch roller) which is linked to
the PLAY idler and PAUSE arm. At the same timg
the PLAY idler and pinch roller are pressed down
And with PAUSE cam, it is locked at the PAUSE
position and becomes into PAUSE mode.
o PAUSE position
. Head comes down 1.7 mm at center value from the
PLAY position
. Pinch roller does not contact with the capstan"
. PLAY idler does not contact with the reel table,
. Play muting switch and power supply switch are in
ON mode.
. Clearance of pinch roller : 1.7 mm at center
. Clearance of play idler : 1.7 mm at center
F i g . 3 - 2 . P L A Y m o d e d i a g r a m
Left direction
R i g h t d i r e c t i o n
STOP lever
F i g . 3 - 1 . P L A Y m o d e d i a g r a m ( m o t o r i n s t a l l i n g s i d e )