JVC DD-9 A - Integrant Circuits; IC A01, A02, A03, A04 Dolby C NR; IC01 UPC4557 C Headphone & Meter amp.; IC801 M54886 P Mecha. control IC

DD-9A/B/C/E/J/U
Integrant Circuits
@
1CA01,
A02,
A03,
A04
@
1C701
AN6870
Display
Dolby
C
NR
Block
diagram
(Block
diagram)
(Top
view)
Ore
rT
ai
ie
in:
ie
iE
i
Dolby
Integrated
Circuit
7
=
oi
Nek
National
LM1111BN
oe
eee
4
(internal
link)
|
ai
l.9
a
i]
ch?
outs
|
f]
(+6
dB)
|
!
! |
0
dB
Adj
(a
I
5
|
ouTo
| (+3 dB)
| f .
te ae le J
; -
HOLD JOLOP-----—
ba
[TT J
@ 1C01 UPC4557C Headphone & Meter amp.
1CCO1 AN6552 Monitor amp.
L)
Equivalent circuit
L]
(Top view) @ HD74LS00 C (-12.48)
e HD74LS03 sis
OUT1
vr
.
|>
ls
(-15
dB)
(Top view) . Ae
> < r | (6) 20.8)
Thil2] OUT2
Ini [3] 6] fiz
v- 5] Ine
@ HD74LS00 Equivalent circuit (1/4)
@ 1C801 M54886P Mecha. control IC
Block diagram
(Top view)
PAUSE/STOP
Vec
os
x
PAUSE
Input
-
circuit
REC OUT 7 STOP
SE
*
'
PAUSE
OUT
FF
otek
PLAY
OUT
7
7
PLAY
circuit
1
MOTOR(F) OUT $ outputs PEW Input
/JREC circuit
MOTOR (R) OUT 1
* TIMER _} Input
BRK OUT START @ circuit
FF/ PLAY
Inputs: REW /REC
circuit
|
Outpu
=
pene
PLAY
OUT
1
6
Ly
aa
renee
Output
+2
MOTOR(F)OUT
!
TIMER
START
@
HD74LS03
Equivalent
circuit
(1/4)
AUTO
© Vcc
ANTIREC
Timing
signal
T
circuit
Read temporary-inhibit circuit
4
Output mode selection circuit
Output sequence control circuit
GND
MUTE
OUT
input
|
‘
AUTO
circuit
IL)
MOTOR(R)
OUT
¥
%&
}
Open-collector
output
©
Input
'
7
antiRec
&
own]
l
circuit
0
BRK
OUT
1
1
-O
GND
1.6-sec
i
L
Pes
counter
Fig. 30
No, 4198
—~23-