Service manual

– 19 –
CD-CH1500H/CD-CH1500W
Figure 19 BLOCK DIAGRAM (4/6)
H/N
P.B
REC
R REC L REC
POP REDUCE
R NF L NF
R NF L NF L R L R
20
7
18
8
17
13
21
4
5
2
3
22
6
9
16
1211
1
2324
VCC
AC BIAS
ERASE
HEAD
L-CH
R-CH
P.B
REC
REC MUTE
REC P.B
PB_MUTE
S-MUTE
C2B_DI C2B_CE C2B_DO
C2B_CL
D_GND
W
U
V
R
S
T
O
TO MICOM SECTION
Q507
Q508
JK501
AUX IN
Q509
Q501
Q502
IC502
LC75341
AUDIO
PROCESSOR
IC503
NJM4558M
MOTOR DRIVER
R-CH
L-CH
24
23
21
18
17
16
15
14
13
12
11
10
9
8
7
4
3
2
1
LSEL0
RSEL0
RIN
VDD
CLK
LIN
VSS
CE
DI
A_+B
A_-B
L_CH
TO MICOM
SECTION
C2B_DO
C2B_CL
C2B_DI
C2B_CE
CD
TUNER
TAPE
AUX
REC_R-CH
TAPE_L
TO MICOM
SECTION
TO MICOM
SECTION
CD_L
8
7
5
4
3
1
a
d
f
g
k
l
+B
+B
-B
SWITCHING
SYSTEM
MUTE
REC_L-CH
TO POWER
SECTION
CNS940
Q119
Q120
IC102
BA3126N
HEAD
SELECTOR
Q101
Q102
CNP102
Q116
Q114
Q115
IC101
AN7345K
PLAYBACK AND
RECORD/PLAY BACK
AMP.
SWITCHING
BIAS
BIAS OSC.
SWITCHING
RECORD/
PLAYBACK
HEAD
9
5
7
6
8
4
3
2
1
REC_MUTE
REC_CONT
REC_L-CH
REC_R-CH
TAPE_R-CH
TAPE_L-CH
REC_BIAS
A_+10V
M_+10V
BIAS_GND
A_GND
L-CH
REC_L-CH
A
B
C
D
1
2
3
4
5
6
7
8
L
R
L
R
L
R
L
R
L
R
LR
FROM MAIN PWB
A_GND