Sharp CD-CH1500 Service Manual page 18

CD-CH1500
SWITCHING
Q351
TUN_L
TUN_R
X351
456kHz
VR351
FM MUTE
LEVEL
A_+B
VD301
AM
T306
T306
ANTENNA
9
8
7
6
5
4
3
2
1
BAND 3
PASS BF301 2
FILTER
1
CNP303
3 2 1
3 2
FM/AM
AM
LOOP
ANTENNA
FM
(FM/AM)
13 MO/ST 12
PHASE
14
L-CH OUT
15 R-CH OUT
PHASE
11
MPX IN
16 IF OUT 10
MPX
9
17 VCC
VCO
CF351
FM IF
8
FM DET
STEREO 7
SD
6
18 5
FM/AM OUT GND
19 AM LOW CUT 4
AM IF IN
CF352
20 VSM
21 AM RF IN
T351
AM IF
22 FM AFC
REG
3
23 2
AM OSC IN AM MIX OUT
1
24 AM OSC OUT
FM IF IN
CF302
FM IF
AM OSC.
VD303
T312
FM IF
FM OSC.
T311
VD302
+B
L312
FM RF
1
Figure 18 BLOCK DIAGRAM (5/6)
A_+B
+B
IF IN ST IND
12 11
13 IO2
MO/ST 10
NC 9
14 MUTE
AM IN 8
15 MW
16 FM IN 7
FM
17 VDD
6
18 PD DO
19
CL
5
DI 4
+B 3
20
CE
AOUT
21 VSS 2
NC
1
22 X OUT X IN
X352
4.5MHz
PLL(TUNER)
VT_CK
TP301
Q302
OSC BUFF
– 18 –
A_+B
C2B_CE
C2B_CL
C2B_DO
Q360
SWITCHING
C2B_DI
Q371
C2B_DO
SWITCHING
C2B_CL
C2B_DI
C2B_CE
IC302
LC72131
1
3
7
9
4
ERASE
HEAD
REC
P.B
L-CH
R-CH
AC BIAS
RECORD/
PLAYBACK
HEAD