Sharp XL-505

XL-505/505C,CP-505B
– 18 –
Figure 18 BLOCK DIAGRAM (3/4)
AM ANT.
T302
FM MUTE LEVEL
VR351
AM OSC OUT
SWITCHING
R-MUTE
X351
AM OSC.
T306
CF351
T351
AM IF
CF352
+5V
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
VD303
L302
IC301
TA7358AP
FM FRONT END
PLL CONTROLLER
LC72131
AUDIO
+12V
VOLTAGE
REGULATOR
ZD351
ANTENNA
CNP301
AM LOOP
FM
BF301
FM+B
FM IF
T304
CF302
VT
L303
VD302
FM OSC
RF AMP.
IC302
VT
D GND
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
VT
FM RF
Q305
R
REC L
TAPE L
T
C
BIAS OSC.
SWITCHING
NF
ALC
L-IN
L-OUT
REC
RECORD/PLAYBAK
HEAD
R-CH
L-CH
ERASE HEAD
BEAT CANCEL
SWITCHING
B-CAN
REC
SWITCHING
Q172
SWITCHING
Q171
REC
REC MUTE
A-12V
SWITCHING
R-CH
L-CH
R-OUT
IC102
BA3311L
REC./P.B
EQUALIZER
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
1718
21
24
2
3
1
8
7
9
43
5
6
1
11
10
9
7
6
5
431
12
15
16
20
21
22
9
8
7
6
5
4
3
2
8
10
2
7
12
611
9
5
31
1