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ICF-CD73/CD73V
6-4.
BLOCK DIAGRAM – MAIN Section –
CD LCH
LINE AMP
+
A
Q153
(Page 17)
ICF-CD73V
(Page 19)
TU LCH
LINE AMP
B
Q152
ICF-CD73
(Page 18)
ICF-CD73V
(Page 19)
PLL DATA, PLL CLK,
PLL CE, COUNT, MUTE
PLL DATA
C
65
R DATA
PLL CLK
64
R CLK
ICF-CD73
PLL CE
66
R CE
(Page 18)
COUNT
63
COUNT
MUTE
62
MUTE
SEG0 – SEG17
LIQUID CRYSTAL DISPLAY
S501 – 503
S601 – 606
S607 – 611
RV601
VOLUME
FILTER AMP
Q151
AGC
MUTING
Q154
Q101
D101
R-CH
R-CH
D309
AGC CONTROL
SWITCH
Q301
MUTING
CONTROL SWITCH
Q403
78 79
SYSTEM CONTROLLER
IC401 (2/2)
COM0 – COM3
10 – 27
6 – 9
LCD401
WAKE UP
SWITCH
51
KEY CHK
Q401
46
KEY0
45
KEY 1
44
KEY 2
75
74
71
70
X402
X401
4.19MHz
32.768kHz
POWER AMP
IC303
LOUT
LIN
+
7
1
R-CH
R-CH
52
RESET SIGNAL
RESET
76
GENERATOR
D401
IC402
UCOM B+
D308
DC/DC
VT B+
CONVERTER
Q304, 305, T301
R ON
32
POWER
AMP B+
POWER ON
31
AC IN
41
VH
43
DC MIDDLE VOLTAGE
CONTROL SWITCH
Q405
VM
42
BATT CHK M
80
DC CHK
49
LOAD CONTROL
LOAD
77
SWITCH
Q406
20
20
• R-ch is omitted due to same as L-ch.
SP101
(L-CH)
• SIGNAL PATH
: TUNER (FM/AM)
SP201
(R-CH)
: CD PLAY
R-CH
AUDIO
CIRCUIT
B+
PVCC
D402
+3.3V
REGULATOR
IC403
+3.3V
REGULATOR
IC301
+6V
B+ SWITCH
REGULATOR
Q302, 303
Q301, 306, 307
J901
+
–
DC IN 6V
DRY BATTERY
SIZE "C"
(IEC DESIGNATION R14)
4PCS. 6V
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