Sharp XL-520H Service Manual page 18

XL-520H,520E/CP-520,520E
T301
T302
MW/LW ANT.
MW/LW OSC.
AM
LOOP
T305
ANTENNA
T306
CNP301
1
2
SO301
ANTENNA
TERMINAL
8 3 4
S0007WFM FRONT END
RECORD/PLAYBAK
HEAD
L-CH
R-CH
ERASE HEAD
CF302
FM +B
5 1
FW301
IC101
BA3126N
REC SW
1
2
3
P/B SW
CONT
4
5
6
AUDIO +12V
P/B SW
7
8
9
REC SW
Q171 SWITCHING Q154 BEAT CANCEL
SWITCHING
Q155
REC
Q172
SWITCHING
Figure 18 BLOCK DIAGRAM (3/4)
FM MUTE LEVEL
VR351
AM OSC OUT
24 23 21 20
1 2 4 5 6
AM IF
T351 CF352
VT
D GND
22 21 20
X352
4.5MHz
1 3 4 5
IC302
LC72131
PLL CONTROLLER
SWITCHING
Q101-Q104
SWITCHING
A-12V
Q151
Q152
L151
BIAS OSC.
SWITCHING
Q153
REC BIAS
CONT
– 18 –
X351
18 17 16 15 14 13
8 9
7 10 12
VCC
+5V
CF351
+5V
16 15 12
6 7 9
10 11
REC
3 1
L-IN
IC102
5
150K
8
–
+
10
ALC
MUTE
ALC
2
+
R-IN
9 –
150K
6 7 12
11
SWITCHING
R-MUTE
Q351
VOLTAGE
REGULATOR
ZD351
AUDIO
+12V
A-GND
AUDIO +12V
FM+B
Q360
VOLTAGE
REGULATOR
CE
REC
TAPE
REC
Q105
REC MUTE
Q106
A-12V
L-CH
SWITCHING
Q107
R-CH