Service manual

CD-C422/C422C/C2800/C2800C
– 16 –
Figure 16 BLOCK DIAGRAM (2/3)
SO401
AUX IN
L-CH
R-CH
PB HEAD
1
2
3
4
L NF
L (T1)
R (T1)
L (T2)
R (T2)
R NF
4
5
13
21
24
23
18
17
10
1915
12
14
16
20
H/N
6
7
8
9
T1/T2
POP REDUCE
L REC
R REC
R NF
REC
L NF
P.B.
REC
L-CH
R-CH
REC/PB
HEAD
ERASE
HEAD
BIAS
OCS
REF
ALC
HIGH
NOR/
T1/T2
1
GND
3
4
5
1
X352
4.5MHz
OSC
7
STEREO
FM/AM
SWITCHING
ST
ST
1
3
4
57
8
6
FM IF
OSC BUFF
AM IF
FM IF IN
VT
FM RF FM OSC
FM
OSC
FM IN
AM IN
FM
5
3
AM MIX
AM IF
6
9
FM/AM
VCC
21
20 13 15
10
111617
MON
O
DET OUT
MPX IN
24
2223
AM OSC IN
AM+B
AM RF IN
FM DET
VCO
FM DET
MO/ST
F
M
+B4
9
AM TRACKING
AM BAND
COVERAGE
+B4
L
R
PLAYBACK&RECORD/
PLAYBACK AMP.
IC501
AN7345K
L
R
P.B
IC301
FM FRONT END
TA7358AP
FM BPF
FM/AM IF MPX.IF
IC303
LA1805
TAPE
VIDEO
TUNER
CD
FROM CD SECTION
Q571
L501
Q566
Q565
BIAS
Q511

Q514
~
P.B
REC
AC BIAS
Q515
Q516
Q583
Q581 Q582
T1/T2
MUTING
Q575
Q576
REC
+B4
L
R
Q351
7
6
CE
DI
CL
DO
22
10
20
15 16
21
17
11
Q381
T382
T381
VR381
CF301
T302
T301
Q301
T331
VD331 VD332
T333
L312
IC302
LC72131
PLL CONTROLLER
FM
MPX VCO ADJ
TAPE 1
TAPE 2
R
L
FM OSC
L301
SWITCHING
SWITCHING
SWITCHING
SWITCHING
SWITCHING
FM&AM LOOP ANT
VOLTAGE
REGURATER
+B4
SWITCHING
BIAS
FM +B