Service manual

– 21 –
XL-70/70C
Figure 21 BLOCK DIAGRAM (2/4)
C MUTE
Q105
Q106
REC
STEREO
SD
CE
CD+B
P MUTE
P-STB
DI
CL
DO
FM ST
SD
1 2 3
4
5
6
7
CD L
CNP605
TO CD SERVO PWB
BIAS
REC
RUN_PLS
MOT SOL U_CON 5V D-GND
M_12V A_12V TAPE SW
REC L/R CH
TAPE L/R CH
TO DISPLAY PWB
TO
DISPLAY
PWB
B-CAN(NC)
11
2 3 4 5
6
7
8
9
10
SO601
SPEAKER
TERMINALS
J601
HEADPHONES
13
IC601
LA4451
POWER
AMP.
12
7
VCC
4
NF
L-CH IN
R-CH IN
L-CH OUT
R-CH OUT
P-CONT
MUTE
Q602
Q601
VSS
VDD
IC401
LC75342M
15
14
13 12
11
10
9
17
18
19
20
21
22
23
24
25
26
27
28
29
16
8
7
6
5
4 3 2 1
CE DI
30
CL
LOGIC
TUN L
TAPE L
CD L
TAPE R
TUN R
CD R
1
2
3
4
5
6
7
8
9
CNS704
R-MUTE
SWITCHING
R_MUTE
351
J
5.1B
Q360
LE
A_12V
E
R
FROM
DISPLAY
PWB
CNP652
Q607
Q605
Q604
Q606
Q608
Q603
Q609
VOLTAGE
REGULATOR
CD+B
CD_6.2V
MECHA 12V
(M_12V)
AUDIO 12V
(A_12V)
ND
A_12V
R-CH OUT
L-CH OUT
A_12V
A-GND
CD R M-GND
M_12V
D_GND
CD_6.2V
L-CH
L-CH
+
+
1
2
9
2
5
11
8
14
REC R CH
REC L CH
NC
FUNCTION/VOLUME EQUALIZER
R-CH
L-CH
SO401
2
1
3
2
1
GND
CNS652
Q682
Q681
Q683
T.F
D656~D659
D651~D654
VOLTAGE REGULATOR
RLY681
SO651
AC POWER
INPUT SOCKET
AC120V,60Hz
T681
SUB POWER
TRANSFORMER
D681~D684
CNP681
T651
MAIN POWER
TRANSFORMER
F652
1.6A 125V
F651
4A 125V
GND
2
2
1
1
GND
CNS651
CNP651
1
AUX R
AUX L
3
VIDEO/
AUX
INPUT
SUB
WOOFER
OUT