Service manual

XL-520W/CP-520
– 18 –
Figure 18 BLOCK DIAGRAM (3/4)
Vcc
+5V
AM ANT.
T302
FM MUTE LEVEL
VR351
AM OSC OUT
SWITCHING
R-MUTE
X351
AM OSC.
T306
CF351
T351
AM IF
CF352
+5V
VCC
AM MIX OUT
FM IF DET./
FM MPX./AM IF
IC303
LA1832
(AM/FM)
MO/ST
L-CH OUT
R-CH OUT
MPX VCO
MPX IN
FM/AM OUT
AM RF IN
AM OSC
OUT
AM OSC
IN
AM MIX OUT
FM IF IN
SD
GND
AM IF IN
STEREO
FM DET VCC
IF OUT
PHASE
PHASE
Q351
AM IF IN
IC301
TA7358AP FM FRONT END
PLL CONTROLLER
LC72131
AUDIO
+12V
VOLTAGE
REGULATOR
ZD351
AM
LOOP
ANTENNA
CNP301
SO301
ANTENNA
TERMINAL
CF302
T304
BF301
L303
VD302
L302
VD303
IC302
VT
D GND
FM +B
X352
4.5MHz
X OUT
X IN
AOUT
DO
CL
DI
CE
FM
FM
FM IN
AM IN
MO/ST IF REQ
IF IN
VSS
AUDIO +12V
FM RIPPLE
FiLTER
FM+B
+5V
A-GND
Q360
SRS2 SRS1
R
REC L
TAPE L T
A
C
L
BIAS OSC.
SWITCHING
NF
ALC
L-IN
L-OUT
REC
RECORD/PLAYBAK
HEAD
L-CH
R-CH
ERASE HEAD
BEAT CANCEL
SWITCHING
B-CAN
REC
SWITCHING
Q172
SWITCHING
Q171
REC
REC MUTE
AUDIO
+12V
SWITCHING
R-CH
L-CH
R-OUT
REC./P.B.
EQUALIZER
IC102
BA3311L
150K
150K
MUTE
NF
R-IN
Q152
SWITCHING
Q151
L151
Q153
IC101
BA3126N
HEAD SELECTOR
AUDIO +12V
SWITCHING
Q101-Q104
DI
Q105
Q106
Q107
A-12V
REC BIAS
CONT
Q154
Q155
REC SW
P/B SW
CONT
P/B SW
REC SW
+
–
–
+
ALC
CE
23
12 4
5
6
7
89
10 12
13
14
15
16
171820
21
24
2
1
63
321
7
89
1
11
10
9
7
6
5
431
12
15
16
20 17
21
22
21
9
8
7
6
5
4
3
2
8
10
2
7
12
6 11
9
5
31
1
CNP602
FM IF