Service manual

– 17 –
CD-C422/C422C/C2800/C2800C
Figure 17 BLOCK DIAGRAM (3/3)
M
13
4
3
11
MUTE
L
R
R
L-OUT
R-OUT
F
M/AM
I
TCHING
S
TFM
9
10
MONO/ST
FM
9
2
5
12
R-IN
L-IN
7
VCC
14
NF
8
+12V (DRIVER)
+12V (AUDIO)
+B5
+B4
OUT
L
R
IC961
LA4550
POWER AMP.
+B4
PRESET GRAPHIC EQUALIZER
VDD
X-BASS
VSS VREF LVREF RVREF AVSS
GRAPHIC EQUALIZER
VOLUME
58
55
R
R
L
L
L
TAPE
VIDEO
TUNER
CD
Q
381
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
+B1
+B1
+
–
JA961
HEADPHONES
SERVO
+5V
+5V
TO CD SECTION
IC941
IC942
IC401
LC75394E
AUDIO PROCESSOR
23
16
33
17
32
19
30
21
28
14 35 56 63 50 26 27
12
37
11
38
10
39
24 25 57
CL
DI
CE
L
TAGE
U
RATER
+B4
25
27
29
30
33
34
35
36
37
38
39
40
42 41434445464748495051 4352535455565859
60
65
70
57
2423222120191817
77
79
80
72
71
16151413121110
9
~
6
1
~
~
~
7
8
3
RX701
2
1
SYSTEM STOP
DO
DRF
DI
CE
CL
RESET
XL702
4.19MHz
AVDD
AVREF
VDD
+B2
KEY
SW701

SW719
SW723
SW724
TO POWER SECTION
+B5
PHM1
RESET
Q704
Q705
ZD701
MEMORY
BACK UP
+B2
3
2
1~
3330 31 32
Q701
+B2
+B1
UNSWITCH
FL701
DISPLAY
~
61
64
~
POWER
T.F
AC 120V 60Hz
PT901
AC POWER
SUPPLY CORD
VOLTAGE
REGULATOR
Q901
Q941
D909

D911
~
D905 ~ D908
D901 ~ D904
ZD901
Q702
IC701
IX0191AW
SYSTEM CONTROL
MICROCOMPUTER
TO CD SECTION
TO CD SECTION
TO CD SECTION
TO CD SECTION
9
43
6
40
8
44
5
41
7
45
4
42
+
–
+
–
+
–
SO961
FRONT SPEAKER
TERMINAL
CD PUIN
CD SL+
CD SL–
VDD
TAPE SOL
TAPE MOTOR
TAPE MECHA STOP
TAPE F.P.
T1 RUN PLSE
SOLM1
SOLENOID
SWM5
CAM
SWM4
F. A. S
SWM3
FOOL PROOF
TAPE
MOTOR
L-CH INPUT
R-CH INPUT
T2 RRUN PLSE CD UP DOWN/DISC NO
CD DSP RES
CD T/T OPEN/CLOSE
RESET CD DSP SQOUT CD DSP COIN CD DSP RWC
CD DSP CQCK
CD DSP WRQ T1/T2 TAPE REC TAPE BIAS
Q706
Q703