JVC MX-DVA5 Service Manual page 27

TC7S08F (DIC7, VIC3) : 2 Input and gate
1. Pin layout
IN B
1
5
VDD
IN A
2
VSS
3 4
OUT X
KA22291(JIC1) : RB/REC PRE amp.
1.Pin layout
24 23 22 21 20 19 18 17
KA22291
1 2 3 4 5 6 7 8 9 10 11 12
2.Block diagram
100k
24
PB OUT(2) PRE
RECORE
16
Vcc
I.REF
PLAYBACK
17
Vcc
I.REF
9
REC GND
1
PRE
PB OUT(1)
100k
2. Block diagram
A
B
16 15 14 13
PB NF(2) PB IN(2) R/P SW
22 21 8
23
INPUT
REC.BIAS
MODE CONTROL
/BIAS CIRCUIT
PB.BIAS
INPUT
N.F
2 3 4 5
PB NF(1) PB IN(1) A/B SW
MUTE MUTE REC
SW IN(2) ALC OUT(2)
19
20 18 15
7 6 10
PB MUTE REC
GND IN(1) OUT(1)
VCC
Y
GND
100k
NF
14
REC NF(2)
PRE
INPUT
13
REC IN(2)
ALC
DET
12
REC IN(1)
INPUT
PRE
11
REC NF(1)
N.F
100k
MX-DVA5
1-27