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cD-320
I. FEATUEES
1.1 Fully Selèctâble Automrtic Rêcord LeYel and P..k
Limitêr
According to program source, thrèe relections are
p o s r i b l e A B L . L I M I T E R a n d M A N U A L .
1.2 Ons.Toùch Rocordine
The tâpe recorde. can be set 10 the recording mode jusl
by prersing rhe REC button. Thero ir no need to pres.
1.3 Auromatic Tor.l M.ch.ni3m Shut Oft
When the tâpe comes 10 the end in any of the play-
bâck, record, fart foward and rewind modes ot opera.
rion, the Îâpe tension conlrolled auto.rlopper actuales
to âulomaticâlly release the locked pushbutton. ll
takes 2 to 6 seconds to rel€ase lh€ pushbutton afi€r
the tape is woùnd up: .ote that the inte.val becomes
longer with decreale ol the power line voltage. Locked
PAUSE pushbunon prevents operâlion ol the âuÎo'
!.4 Du.l Flywh..l Mcchâniim
Applying two flywheels turning round opposirely to
èach othe.. the sùength câusêd by wobble or oihe6 k
caôceled each other. ând stable performance ol tly-
wheel rotation ir always a$ured.
1.5 Cue and R.ri€w Pulhbunoni
B y d e p r e s s i n g t h € C U E o r R E V I E W p u s h b u t t o n , t h e
tape can be fast loruârd or rewind while monitoring
recorded sound. this feâture is very convenieni for
easy relerence and indexing o. repeared plâyback. 8y
d e p . e s t i n g t h € C U Ê o r R E V I Ê W p u s h b u t t o n w i t h t h ë
PLAY pushbunon leaving depressed, the pinch roller
s separated from the câprtan, allowing the tape to be
1.6 Fourwây Power Supply
The Nlodel CD320 can be operated by four power
s o u r c e s : d r y c e l l s { U l 1 x 4 ) , A C p o w e r l i n e , e x t e r n a l
D C p o w e , s u p p l y ( D C A - 6 , s o l d s e p a . a t e l y ) â n d r e -
c h a . s e â b l e b â t t e r y b a c k { B B D . 1 , s o l d s e p a r a i e l v } . T o
p r e v e n t t h e p o s s i b i l i t y o f b € i n g o v e r l o â d e d b y t w o o r
more power sources, the contacts of rhe AC jack
( J 0 0 1 ) a n d e x t e r n a l O C j a c k ( J 0 0 2 1 a u l o m a t i c a l l v
select only one power supply in the following pri-
o r i r y : 1 . A C p o w e . l i n e ; 2 . e x t e r n â l D C p o w e r s u p p l y ;
3 . d r y b a n e r i e s l r e c h a r g e a b l e b a t t e r y p a c k ) . T h a n k s
10 irs builr.i. rechârge circuit. even when not operated,
the Model CD'320 can recharge lhe r€charseable
battery pâck as long as ir is coôôected to AC power
l i n e o r e r t e r n â l D C p o w e r s u p p l y .
2. SERVICE ItloTE
As can be seen trom the circuit diagram, the chassÈ ol
l V o d e l C D . 3 2 0 c o n s i s $ o f f o l l o w i n s u n i $ . E a c h u n i l
mounæd on a printêd circuit board is dêscrib€d wilh
the square enclosed by bold dotted line on the circuit
Pr..Aûp, Pomr Suptly. Swilch,
Inpurs.t cr, Dolby . , . , .
muri.d
ôn P.w. Bqtd PIOO
T . r m i n . r . . , . . . .
.
É ù n t . d o n P w . a o t d P s o o
Pù.r S.hr
lN V.6ion) . . .
m(trd
on?lry.so.td PaOO
M i c . A r r . . . . . . .
.
. .
m ù n . . d o n P . w . B o . r d ? 7 0 0
H . . d p h o m . . . , . . , . . . .
m o ù . r . . | o n P . $ r . B o . d P A d t
a . c h ù r . . b l . , . . . . . . , , .
m u n r . . l o . P . W . B * d P a o r
F ù - I U C v . . r i o n l , . . , . .
m ( n n d d P . W . a r y d P g d t
3. TESI EOUIPMEI{T
REOUIRED
FOB SE8VICIIIG
BEPLACEMEI{T
For measuring checking the lvlodel CD.320, the follow_
ing inrtruments and mat€rialr are necessâry,
. A u d i o O s c i l l a t o r { a f O S C )
.Artenuator (600 o)
.Wow ând Flutt€r Mete.
.Torque Meter (Cassette Type)
.Digital F.equency Countèr
.Blânk Tap€ (Completely eraeed wirh bulk eraser)
T D K A C ' 2 l l
{ N o r m â l l
T O K A C - 5 1 1
( C r O r )
S O N Y C S . 3 0
( F e . C ' )
NOTE:
lf any doubt k noted in a measured
varue, useg new lôPe,
.Test Îâp€s {New Tape}
I V T T . l 1 l
W ô w a n d F l u t t e r , T a p e S p e e d
M T T . 1 1 2
M e a s u r e m € n t o l O u t p u t L e v e l ,
S i g n a l . l o _ N o i s e
R â t i o
lVTT.l50
Adiusthênt ol Output Level
' l\4IT.1l6U
FrequencY Besponse (for Normal)
Frequency Bespons€ (for CrO,,
F e . C r l
tvTT,1l6K
M T T . l 2 1
C r o s s T a l k
M T T 1 4 1
C h a n n e l S € P a r a t i o n
M T T - I l 5 C
P l a y b a c k E O , A z i m u t h
S|AS and EO swirches tetting i,r âccordance with lâpe
aiâ3
EO
120!s
C r O l
H i g h
70/$
Fe-Cr
7olrs
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