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HCD-SD1
– 19 –
– 20 –
– MAIN SECTION –
STBY+5.6V
90
65
66
67
20
21
22
99
98
69
76
39
38
37
36
4
15
8
28
35
5
6
7
82
83
84
85
86
87
88
100
38
37
36
35
22
4
2
16
43
45
52
53
60
63
49
50
61
62
57
58
59
RECTIFIER
D921,922
CDD+5V SW
Q942
RECTIFIER
Q951,953
ST 12V OUT
Q951,952
RECT
D971
SWITCH
Q103
DEFB SW
Q121
MUTE
Q141
RELAY SW
Q502,503
RELAY DRIVE
Q504
RELAY SW
Q501
FAN-DRIVE
Q551–553
SPEAKER
INPEDANCE
6-16Ω
SYSTEM
CONTROL
DIGITAL
OPTICAL
MUTE
Q505
MUTE
Q111
MUTE
Q112
MUTE SW
Q183
MUTE SW
Q182
MUTE SW
Q181
SWITCH
Q753
SWITCH
Q793
SWITCH
Q792
SWITCH
Q791
BUFFER
Q601
SIRCS
IC602
+
–
–
+
1
2
5
VOLUME
S691
TIMER:RED
ON:GREEN
STANDBY:RED
SWITCH
Q752
14
15
12
13
2
1
9 10 11
51
56
5 – 50
63 62 61 60
AC IN
AC OUTLET
CN904
T991
MAIN
TRANSFORMAER
T991
SUB
TRANSFORMER
±B
RECT
D941-944
A±7.5VREG
Q941, 946
RECT
D901-904
RECT
D961-964
VG SWITCH
Q966
VG SW
Q964
VF SW
Q962,963
BS
VF SWITCH
Q965
A±7.5VREG
ST12V
D±5V
M+7V
CDD+5V
10
9
8
3
+
–
16
27
25
18
3
5 7
1
1
2
PANEL SW
S699
31
81
75
56
55
51
26
25
19
18
14
13
11
10
73
72
70
64
8
SWITCH
Q943
TO IC701 VDD
1
RESET
Q751
RESET
IC951
15
2
3 1
68
FAN
L
R
J667
CN781
IC311
3
3
1
1
STBY+5.6V REG
IC901
3 1
DOUT
L-OUT
AM
ANTENNA
FM
75Ω
TUNER
UNIT
R-OUT R-CH
ST
TUN
MUT
DO
CL
DI
CE
R-CH
R-CH
SIRCS
DAT
CLK
LAT
ST
TUN
DO
DI
CL
CE
MUT
TC-MUT
MD-MUT
MUTE2
SP RELAY SW
MUTE1
HPSW
I C.CLOCK
I C.DAT
HELP
KEY2
KEY1
INT
DATA
ENCODERB
ENCODERA
XT1
XT2
BD POWER
PANEL SW
RESET
AC CUT
LIGHT
X2
X1
TIMER LED
ON LED
STBY LED
ON/XSRBY
FLDISP SW
SDATA
SCLOCK
SLAT1
STEREO
TUNED
ST.MUTE
V/T
FL.RST
FL.LAT
FL.SLK
FL.DAT
RDS.CLK
IN
RDS.DAT
SCOR
CD
LOUT
SQSI
SCOR
SQCK
FSW
SENS
CD-CLK
CD-DATA
DF-LAT
DSP-LAT
BD.RESET
IN SW
OUT SW
LOAD IN
LOAD OUT
SQSO
SQCK
FOCUS SW
SENS
CLK
DAT
DF-LAT
XLAT
XRST
IN SW
OUT SW
LOAD IN
LOAD OUT
D OUT
ST.IDATA
ST.ODATA
ST.CLOCK
ST.LATCH
R-CH
BS
R-CH
R-CH
STEREO
TUNED
MUTING
DO
CL
DI
CE
FM-DET-OUT
BUFFER
Q450
DISPLAY DRIVER
IC601
VF1
VF0
DAT
G12
CLK
CS
RST
–VG
VFL
J101
(1/2)
J102
(1/2)
SWITCH
IC102
FLUORESCENT INDICATOR TUBE
FL601
RDS DECODER
IC451
SOUND PROCESSOR
IC101(1/2)
SOUND PROCESSOR
IC101(2/2)
POWER AMP
IC801
TUNER
BS/CS
MD
CD
BASS/
TREBLE
AMP
• VOLUME
LAT
DAT
CLK
LATCH
DATA
CLOCK
R-CH
R-CH R-CH
R-CH
R-CH
R-CH
R-CH
DBFB
AMP
R-CH
R-CH
+8dB AMP
IC103
J101(2/2)
J102(2/2)
L
R
L
R
MD
OUT
TAPE
OUT
R-CH
D881
R-CH
R-CH
R-CH
DAT
HLP
CLK
R-CH
RY501
SPEAKER RELAY
RY901
STANDBY RELAY
76
23
LY
CLK
DAT
HLP
LX
SY
SX
VG
VF1
VF0
I C BUS
EXTENDER
IC791
2
2
X702
32KHz
X701
5MHz
STBY+5.6V
D752
D751
C759 BACK UP
+
D601-604
D605
t
u
D606
A
CD SECTION
(Page 18)
PHONES
MASTER CONTROL
IC701
KEY BOARD
SWITCH
S621-625,631-634
2
TMB11
D+5VREG
IC921
M+7VREG
IC922
D601
D602
D603
D604
)/±
0/≠
π
fl
MD
IN
L
R
IN
L
R
IN
L
R
CS/BS
TAPE
UG REG
Q961
• R ch is same as L ch
• SIGNAL PATH
: FM
:BS/CS
: PB
: REC
: CD
: Digital out
: TAPE
20
21
X601
4.3 MHz
14
13