Sharp CDC2900 - 3-CD Compact Stereo System Service Manual page 18

CD-C622/C2900
FM AM LOOP
ANTENNA ANTENNA
1
L301
FM B.P.F
AM TRACKING
T331
FROM CD SECTION
CNP11
L-CH
TAPE 1
R-CH
PB HEAD
REC
P.B
L-CH
TAPE 2
R-CH
REC PB HEAD
AC BIAS
ERASE
HEAD
IC301
FM IF
TA7358AP
6 T301
FM FRONT END
9
2 3 4 5 7 8
FM OSC
FM RF
L302
L303
Q302
OSC BUFF
AM BAND
COVERAGE
T333
FM +B
CNS11
1
2
IC101
3
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
L(T1) 1
R(T1) 24
L(T2)
2
R(T2)
23
SWITCHING L NF
3
R NF 4
Q103~Q106
6 T1/T2
POP REDUCE
REC
L REC 9
R REC
16
14
REF
12
NOR/
HIGH
15
SWITCHING SWITCHING
Q107
Q108
Q109
SWITCHING
BIAS
OCS
Q128
L104
Figure 18 BLOCK DIAGRAM (2/3)
+B4
CF301
AM IF
T351 CF351
FM IF IN
1 3
AM IF
AM MIX
IC303
LA1805
FM/AM IF MPX.
FMOSC
24 23 22
X352
4.5MHz
VT
20 1 22 15 16
OSC
IC302
LC72131
PLL (TUNER)
7 10
FM
Q344
SWITCHING
JK601
VIDEO/AUX
L
AUX
R
TAPE
TUNER
CD
+B4
13
P.B.
4 PB
L
21
R
5
20
H/N
L REC
7
18
R
8 L NF
17
R NF
ALC
10
T1/T2
19
Q111
Q110
SWITCHING
Q124
L103
– 18 –
SWM3
FOOL PROOF
SWM4
F.A.S
SOLM1
SOLENOID
+B4
SWM5
CAM
VR351
MPX VCO ADJ
T352
MONO/ST
FM DET
5 6 15
21 20 13
GND FM DET VCO
FM+B MO/ST
DET OUT MPX IN FM/AM
7 16 11
17
Q350
Q343
FM/AM
SWITCHING
+B7 IC704
1
2
VOLTAGE
3 4 5 6
11
REGURATER
+B4
17
21
11 10
5
L
R 16
4
L IC601
R
17
M62439SP
3
L
AUDIO PROCESSOR
R
18
L 2
R
19
1 9
20
Q121
Q122
MUTING
BAIS
Q126
L
9
R 10
3
–B4
R
13
8
L
REC
T1/T2
BAIS