JVC CA-MXKA7, Service Manual

Page: 24 / 67

MX-KA7
1-24
1. Block Diagram
Optical disc ICs HA12237F (IC401)
B
A
B
A
+
PB-NF2(R)
MUTE MUTE
93/120
(High/Norm)
93/120
(High/Norm)
EQ EQ
ALC
31
NC
10
9
8
NC
7
6
5
4
3
2
EQOUT(R)
RECIN(R)
TAI(R)
PB-EQ(R)
ALC(R)
1
32 33 34 35 36 37 38
NC
39
PB-NF1(L)
AIN(L)
RIP
40
20 19 18 17 16 15 14 13 12 11
ALC ON/ OFF
Return SW Return SW
PBOUT(R)
+
PB-NF1(R)
+
+
AIN(R)
BIN(L)
GND
V
CC
ALC DET GND IREF
Test mode (Open for normal use)
REC- RETURN
BIN(R)
+
RECOUT(R)
PB-NF2(L)
NC
NC
EQOUT(L)
RECIN(L)
TAI(L)
PB-EQ(L)
ALC(L)
PBOUT(L)
RECOUT(L)
+
+
+
High/ Norm A/ (REC Return ON/ OFF ) MUTE ON/ OFF REC MUTE OFF/ ON
21
22
23
24
25
26
27
28
29
30
+
+
Pin Description, Equivalent Circuit (cont)
(V
CC
= 12V, Ta = 25
°
C, No Signal, The value in the table shows typical value.)
33 RIP V = V
CC
/2
V
CC
GND
V
Ripple filter
29 PB-EQ(L)
2 PB-EQ(R)
NAB output
Pin No. Pin Name Note Equivalent Circuit Description