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CO NTE NTS/THAI\ISPO
RTATI O N SCREW
T R A N S P O R T A T I O N S C R E W
D I S A S S E M B L Y F O B R E P A I R
B L O C K D I A G R A M
C I B C U I T D E S C R I P T I O N
1. Description of components . .
1 - 1 . D A C U N | T ( X 2 5 - 2 8 6 0 - 1 1 )
. . . .
1 _ 2 . C O N T R O L U N I T
( x 2 9 - 1 7 8 0 - 0 0 ) . . . .
' r - 3 .
c D P L A Y E R U N I T ( X 3 2 - 1 0 9 0 - 1 1 )
. . . . .
.
2. Circuit description
2-1. DAC lnterface circuit (X25-2860-11) ' . . . .
2-2. Dislort"ion correction ci rcuit
(x25,2860-1 1 ) . . . .
2-3. Dropout control circuit (X29-1780-00)
Dual D Ff ip-Flop lC : TC74HC74F
(X25-2850-00 : lCl,lC4)
3 - 1 . B l o c k d i a g r a m
3-2. Truth table .
Hex D Flip-Flop lC : TC74HC174F
(X25-2850-00 : lC3)
4 - ' l . T e r m i n a l c o n n e c t i o n d i a g r a m
4-2. Truth table .
DA Converter r PCM56P-K
(X25-286O-11 : lCl,lC2)
5-1 . Block diagram/Terminal connection
d i ^ ^ - ^ -
u l q q l d l l l
5 - 2 . E x J l a n a t i o n o f t e r m r n a t s
Digitalfifter : SM58O4B (X25-2860-11 : lC4) . .
6 - 1 . B l o c k d i a g r a m
6 - 2 . E x p l a n a t i o n o f t e r m i n a l s
TRANSPORTATION SCREW
Refnre nnpr:ti.}n remove the two red scfews attached
v P v ,
u ! , v ' , ,
'
v
to the bottom of the unit used during transport from the
factory. Remove both screws using a coin, etc. and, after
remoVing, retain them together with the Warranty
card and other documents. When the unit is to be trans-
ported again, be sure replace the two screws to their origi-
n a l p o s i t i o n .
ATTACHING THE TRANSPORTATION SCBEWS
1 . T u r n t h e p o w e r O N w i t h o u t l o a d i n g d i s c .
2. Turn OFF the power after the display shows the follow-
i n q i n d i c a t i o n .
8-4. Explanation of functions . . .
9. Microcomputer : PPD75208CW-040
( X 3 2 - 1 0 9 0 . 1 1 : l C l 1 )
9-1 . Terminal connection diagram
9-2. Explanation of terminals . . .
A D J U S T M E N T . . .
Adjustment
6 - 3 . E x p l a n a t i o n o f
f u n c t i o n s
. . . . . .
1 4
7. Signal processor lC : CX23035
( X 3 2 - 1 0 9 0 - 1 1 : l C 3 ) .
1 4
7 - 1 . B l o c k d i a g r a m
1 4
7-2. Exolanation of terminals
15
8. Digital output signal demodulator lC : CXDl075P
2
3
5
7
7
7
7
I
9
9
1 0
1 0
(X32-1090-11 : lC9) .
B - 1 . B l o c k d i a g r a m
B-2. Terminal connection diagram
8-3. Explanation of terminals
1 6
1 6
1 6
1 7
1 7
. . . 2 0
21
21
20
20
24
27
3 .
4 .
5.
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 3
1 3
1 3
1 3
P 6 n l a n o
I r E 9 r q g s
Abgleich
Description of Signal Waveform, Connection of
M e a s u r i n g l n s t r u m e n t s
. . . 3 0
V O L T A G E C H E C K T A B L E
. . .
3 4
Pc BOABD (coMPoNENr slDE vtEvQ
. . . 1? -
p c B o A R D ( F O | L S I D E V I E W )
. . . . -
. . . . 3 8
S C H E M A T I C D I A G R A M
4 1
E X P L O D E D V I E W ( M E C H A N I S M )
. . . 4 9
E X P L O D E D V I E W ( U N I T )
. . . .
5 0
PARTS LIST .
51
S P E C I F I C A T I O N S .
B A C K C O V E R
/^\
((Lr)
\Y/
@
v
I
@
fl
U
E l E t E l E l C t
C @
@ g l t E t r t E )
r @ r
ID ID IEI E
E 0 @ t D @ @
, - r r - r * ^
c;;;
L, L,
ili.]
3. lnstall the transportation screws.
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