Block Diagram - Sharp XL-70 Service Manual

XL-70/70C
AM LOOP
ANTENNA CNP301
1 L341 T302
1
2 2
BALUN
AM ANT
T306
AM OSC.
SO301
FM ANTENNA
FM IF
T304
FM RF
VT
FM OSC
1 2 3 1 2 3 4 5 6 7
BF301 IC301
FM FRONT END
BAND
TA7358AP
PASS
FILTER
CNS101
L-CH
1
2
RECORD/
3
PLAYBACK
HEAD
4
5
R-CH
6
7
8
ERASE
HEAD
M901
TAPE MOTOR
CFW901
1 1
+
M
- 2 2
SW901
FOOL
PROOF
SOL901
SOLENOID SW902
CAM
AM OSC OUT
VD301-1
SVC348S
VR351
10K(B)
FM
MUTE
LEVEL
VD301-2
SVC348S
Q305
CF302
1 3
FM IF AMP. 10.7MHz
FM IF
FM IF
CF303 Q306
VT
8 9
L-CH
CNP101
L-CH L-CH
1
L-CH
2
A-GND
3
A-GND
4
R-CH
5
A-12V
R-CH
6
ERASE R-CH
7
A-GND
8
R-CH
Q171 Q172
SWITCHING
SWITCHING
PH901
PHOTE INTERRUPTER
7
6
5
4
3
2
1
CNP901 CNS901
Figure 20 BLOCK DIAGRAM (1/4)
24 23 22 21 20
IC303
FM IF DET./FM MPX./AM IF
LA1832
1 2 3 4 5
T351
AM MIX
AM IF
OUT
1 3
CF352
2
TP301
IC302
LC72131
PLL CONTROLLER
VT
D_GND
22 21 20 19 18
X352
IC302
4.5MHz
1 2 3 4
IC101
Q101-Q104
HEAD SELECTOR
SWITCHING
BA3126N
REC SW
1
2
3
P/B SW
CONT
4
5
IC101
6
P/B SW
7
8
9
REC SW
SWITCHING
A_12V
Q151
Q152
L151
REC
BIAS OSC
SWITCHING
Q153
REC BIAS
CONT
Q903
SWITCHING
7
6
5
4
Q902
3
SOLENOID
P.F
2 DRIVER
CAM SW
1
M_GND
SWITCHING
– 20 –
X351
456kHz
19 18 17 16
9 10
6 7 8 11
+5V
CF351
FM IF
17 16 15 14 13 12
6 7 8 9 10 11
5
IC102
REC./P.B.
EQUALIZER
NF
AMP.
3
L-IN
IC102
5
BA3311L
150K
-
+
MUTE ALC
+
R-IN
9
-
150K
11
6
NF
RUN PLS
SOL
M_12V
Q906
SWITCHING
Q905
Q904
TAPE MOTOR
SWITCHING
DRIVER
Q901
R_MUT
Q351
SWITCHING
14 13
15
12
ZD351
MTZJ5.1B
+5V
A_1
A_GND
R-M
FM+B
Q360
FM RIPPLE
FILTER
L-OUT
REC MUTE
1
Q105
Q106
A_12V
8
10
2
ALC
7 12
R-OUT
U_CON5V
MOT
1 2 3 4
CNP703
TO DIS