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ii
IC BLOCK
DIAGRAM
IC101
PPD7546G-549
] NO. I PORT NAME
I ACTIVE I
1/0
DESCRIPTION
I
GRID
3 SIGNAL
I
GRID
14 SIGNAL
SEGMENT
g SIGNAL
4
f
H
I
5
"KARAOKE"
L
o
Sw
6
DIGITAL
H
o
7
A FUNC
L
o
12
DUB
IN
H
I
13
PLAY
WV
L
I
14
"KARAOKE"
M
L
I
SEGMENT
f SIGNAL
"KARAOKE" SW CONTROL SIGNAL
MODE
OF DIGITAL
LED +AMP
PCB
1
DECK CONTROL
SIGNAL
(TO
DECK)
I
DECK
PAUSE
SIGNAL
(FROM
DECK)
PUIY
SW INPUT
SIGNAL(FROM
FRONT)
"KARAOKE"
MODE
SW INPUT
FROM
AMP
PCB
15
MUTE
H
I
16
PLAY
o
L
o
MUTE
INPUT
SIGNAL
PLAY
SW
OUTPUT
SIGNAL
(TO MDP)
17
c
H
I
18
b
H
I
SEGMENT
C SIGNAL
SEGMENT
bSIGNAL
19
I
a
I
H
I
I
SEGMENT a SIGNAL
I
IC377 XRU4053B
IC102 PST573E-2-TO-92
16
,VDD
1
Vcc
OUT
GND
8'VSS
7
'
VEE
IC401 SML74W (C MOS Standard Array Audio Signal Controller)
CKI
34
CKF
36
CKO
33
m
I
2 DIA
39 DFA
~fi
3 018
23
36 DFB
8
31 OOA
~s
10
DOB
as
z
37 DMOA8
4
LN40B
12 DMIA
13 DMIB
1
18 RAO
20 RA1
E
19 RA2
:
2.% RA3
23 RA4
o
22 RA5
u
Z
RA6
i
21 RA'1
26 RA8
E
2s RA9
17 m
14
w
16 =
(1)
VARI —
1
40 -
uTEST
( I )
(1)
DIA-
2
39 — DFA
(0)
(1)
DIB-
3
38 -
DF B
(o)
(0)
DMOB -
4
37 -
DMOAB
(O)
(o)
MSB -
5
36 -
CKF
(1)
REPT-
6
35 -
ENDI
(1)
RAMIM-
1
34 -
CKI
(1)
8
33 -
CKO
(1)
LO:—
32 — OCA
(o)
ooEl-
1;
31 — DOA
(o)
ENDO -
11
30 — MIX
(1)
OMIA-
12
29 -
RA9
(1)
DMIB-
13
28 -
RA8
(0)
CAS -
14
27 -
DCB
VDD -
1s
26 -
Vss
(0)
WE-
16
25 -RA6
(0)
RAS -
17
24 -
RA3
(o)
RAO -
18
23 -
RA4
(o)
RA2—
19
22 -
RA5
(0)
RA1 -
20
21 -
RA7
h
(o)
(1)
(1)
(o)
(o)
(o)
(1)
(o)
(o)
(1)
(o)
(o)
(o)
(o)
(o)
ENOO
11
--I-4
END I
MSB
REPT
RAMIM
S1
LOOP
MIX
DCA
OCB
UTEST
VARI
=L-I
-26–
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