Sharp MD-M3 Service Manual page 28

MD-M3/M1
SO301
ANTENNA
AM
T306
AM
GND
OSC
COIL
FM
75 OHMS
+5V
FE301
ANT
8
FM FRONT END
2 6 7
FM/AM
7
BO1
NC
8 B02
TUN MUTE
B03
9
B04
MO/ST
10
STEREO
IO1
11
IO2
13
SD
FM MUTE LEVEL
6
7
13
Q361
12
2
AM MIX OUT
AM IF IN
T351
CF352
AM IF
+5V
T302
AM
ANT
COIL
IF OUT
1
VCO
5
3 4
SWITCHING
Q360
FM/AM
Q371
3 4 5 6
IC302
LC72131
TUNER PLL COTROLLER
19 16 22 1
20 18 15 12 21 17
VT
+5V
4.5MHz
X352
VR351
TUN MUTE
IF OUT
AM OSC OUT
24 10 9
IC303
SD
LA1832S
LOUT
STEREO
4 1
FM IF DET./
1 5
MO/ST
ROUT
FM MPX./AM IF
FM/AM
TUNER
MPX
MUTE
VCO
4 8
17 1 20 18 16
CF302
FM IF
Figure 28 BLOCK DIAGRAM (2/5)
+12V
+B3
VOLTAGE
REGULATOR
+5V
+B3
VRR11
AUX INPUT
LEVEL
Q353
Q354
MD/CD
AUX
Q351 AMP
TUNER
–2.7V
– 28 –
IC901
Q904
XC61CN40
RESET
+5V(D) SY-STOP
2 1
+B9
3
JR11
AUX INPUT
VOLTAGE REGULATOR
+2.7V
+B3
AUDIO
Function/Volume/Tone
VDD
10
2
A
19 ICP11
M62439SP
3
OUT
B
18 AUDIO PROCESSOR 8
13
4
C
17
CONT
5
D
REC TONE
11
16
OUT H L
9 1 6
12 20 15 7 14
VSS
–B2
VOLTAGE REGULATOR
TO CD SECTION
+
+B2
+
+B3 -
–B2
RESET
+B3
VCC
10
1
3
DI
CL
QP
3 6
VDD
8
VSS
4
1 7
TO DISPL