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5. ADJUSTMEI{T
AI{O iIEASUREMET{T
(AUOIO)
IfSTRUCTT0IIS
: -
Predulionr: Prior ro any adjustmenl or meâsuremênt,
carbon leir.chloride, and fully demagnerize rhe heôdi,
clean the head slit' with gauze containing âlcohol or
capsian and similâr parts.
5.4 MECHANICAL ADJUSTMENTS
r-
54.1 Pl.y Operation Chock
{ t ) T i n i n ! C h . c r
.Depress button PLAY, and ch€ck lo make sure that
the take.up reel rotates la.st and then that the pinch
.olle. rotates. Samuitaneour rotation ol these reel
and roller is not acceptable.
NOTE:
For this check. slowly depre$ th€ button
withour tape mounted regârdless ol locking conda.
.Slowly depresr button PLAY, and the take-up reel
w i l l s t a r t r o t a t i o n . A t t h â t t i m e , c h e c k t o m a k e s u r e
rhal â clearance belwe€n the pinch roller and capslan
is less ûan 0.5 mm.
ï
{21Timinr Adiustm.nt
lf ool of specification, bend the pârt of the pinch roller
b.acket which faces thè head chassis sropper. In rhe
figùre rhown above, bend the pâ( in the direction ot A
to decreate the clearance. To increâse the clearance,
b e n d t h e p a r t i n t h e d i r e c t i o n o f 8 .
NOTE: After adjùsûenÎ, check to be su.e that the
pinch roller bra€ket does not contact the heâd chassis
r t o p p e r i n P L A Y m o d e .
5A-3 Torqu3 Adiurtm€nt {FF, REWI
Set thê extended parts {B in the figure shown aoove,
of the torque adiustmênt leaf spring (A in ûe liqure)
o t t h e F F I R E W i d l e r o n â n y o n e o t t h r e e s r e p p r n g
NOTE: To increase torque, set the e)(tended pârts to
t h e s t e p p i n g p a n o f ' I N C R Ê A S E " a n d r o d e c r e â r e i t ,
s e t t h o s e t o l h e r æ p p i n g p â n o f " D Ê C F E A S E ' .
A d j u s t i n g r a n q e : 7 0 - 1 1 0 s . c m .
B
A
- E
5A-4 Pinch Rollor Pr€3ling Forco
As shown above, meâsure pressing force of the pinch
roller using a gauge. Fof measurement, proceed ôs
follows. Pull th€ pinch roller off the caprtan shalt
as shown wath the a.row, and graduallv release n 1o the
€apsran. Jusr when the pinch.oller star6 rorating, reâd
an indicat,on ol â gàuge. Pressrng torcé must range in
300 9 !50 9. lf our ot the range, bend th€ pinch roller
spring in ùe direclion of B or C at secrion A shown
NOTE: To increâse pressing force, bend the said spring
in ihe di.ection ol 8, and to decreare the forc€, bend iÎ
i n t h e d i r e c t i o n o f C .
5A-2 Paui€ Timing
Depress burton PLAY, slowly depress butîon PAUSE,
a n d t h e t a k e u p r e e l w i l l p a u s e . A t t h a t t i m e . c h e c k
to ensure that a cleârance between the pinch roller
and capstan ranges from 0.2 to 0.5 mm. lf out of
the ran(le, adiun a bending angle of $e pinch roller
b r â c k e t â r m ( v i e w A ) .
NOTE:
To increase a clêarance between the pinch
r o l l e r . n d c a p 5 t a n . d e c r e â s e r h e d n g l e { i n t h e d , ' e c l , o n
of C in the figure). To decreâse the cleanrace, increase
t h e a n g l e { i n t h e d i r e c t o n o l B ) .
.
A
Y?-
B
c
:
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