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53
53
HCD-MD595
6-3.
BLOCK DIAGRAM – MAIN Section –
AM
L
R
TAPE IN
ANALOG
IN
J602
J101 (1/2)
R-CH
R-CH
R-CH
27
36
38
37
39
26
28
25
24
23
95
96
2
4
14
13
16
22
RDS SIGNAL
BUFFER
Q401
RDS DECODER
IC401
X401
4.332MHz
35
36
X502
32.768MHz
39
38
X501
16MHz
INPUT
SELECT
SWITCH
TONE
CONTROL
CIRCUIT
VOLUME
CONTROL
CIRCUIT
BASS BOOST
CONTROL
CIRCUIT
35
REC
25
27
28
29
21 22 20
1 2 100
30
CPU INTERFACE
SYSTEM CONTROLLER
IC501 (1/2)
•
SIGNAL PATH
•
R-ch is omitted due to same as L-ch.
: FM
: CD PLAY
: MD REC
: TAPE IN (PLAY)
: TAPE OUT (REC)
: ANALOG IN
F
18
3
5
VREF
R-CH
D881
INPUT SELECT SWITCH,
TONE CONTROL,
ELECTRICAL VOLUME
IC301
44
32
43
POWER AMP
IC801
DC DETECT
Q871
MUTING
Q801
MUTING
Q841
OVER LOAD
DETECT
Q802
PROTECT
DETECT
Q872, 873
MUTING
CONTROL
Q552
MUTING
CONTROL
Q551
D802
+
+
26
R-CH
R-CH
+
R-CH
THERMAL
DETECT
Q874, 875
TH801
+
–
+
–
R-CH
L
R
SPEAKER
IMPEDANCE
USE 6-16
Ω
TM881
L
R
TAPE OUT
PHONES
J101 (2/2)
R-CH
RELAY DRIVE
Q881
45
48 67
R-CH
R-CH
R-CH
G
(Page 52)
MUTING
Q101
MUTING
CONTROL
Q102
J601
PC LINC
CN104
CN102
H
(Page 52)
(Page 52)
BUFFER
Q112
BUFFER
Q111
3
6
2
7
BUFFER
BUFFER
IIC BUS EXTENDER
IC103
POWER
DATA
CLK
DATA
CLK
TAPE
CONTROL
05
TUNER PACK
FM ANT
GND
AM ANT
GND
L
R
DOUT
DIN
CLK
CE
TUNED
STEREO
MUTE
FM DET OUT
MUX
RDAT
RCLK
XO
XI
ST->TA DATA
TA->ST DATA
ST CLK
ST CE
ST TUNED
ST STEREO
RDS DATA
RDS CLK
ST MUTE
92
GEQ DATA
GEQ CLK
GEQ CE
XTIN
XTOUT
XIN
XOUT
IIC HELP
IIC DATA
IIC CLK
PC POWER
SX
SY
LX
LY
STK MUTE
PROTECT
LINE MUTE
SPK RELAY
REC MUTE
HEADPHONE IN
DATA
CLK
LAT
B-O
LINE
TC
CDMD
ST
T-O
V-I
V-O
B-I
OUT
LOUT
IIC DATA, IIC CLK,
IIC HELP
IIC HELP
IIC DATA
IIC CLK
LIN
6
1
1
5
5
COAXIAL
FM 75
Ω
(AEP, UK)
Q301
FEED BACK
SWITCH
Q103
FAN MOTOR
SWITCH
M901
(FAN)
D101
M+7V
63
FAN
M
M