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ICF-CD553RM
15
15
6-2.
BLOCK DIAGRAM – TUNER Section –
CF2
CF4
13
T1
AM IFT
X1
75kHz
14
17
18
T1
AM IF
PLL DATA
PLL CLK
PLL CE
COUNT
R-CH
TU LCH
T2
FM/TV/WEATHER
IFT
T2
FM/TV/WEATHER IF
PLL DATA, PLL CLK,
PLL CE, COUNT
•
SIGNAL PATH
: FM/TV (2
–
6CH)
: AM
•
R-ch is omitted due to same as L-ch.
: TV (7
–
13CH)/WEATHER
D1
B.P.F.
BPF1
D13
D15
L1
TV/WEATHER
RF
CT2
D14
L2
FM/TV
RF
RADIO B+
D2
D17
L3
TV/WEATHER
OSC
CT4
D24
L4
FM/TV
OSC
CT3
RADIO B+
RADIO B+
TV (7-13CH)/
WEATHER
ON SWITCH
Q11
RADIO B+
FM/TV (2-6CH)
ON SWITCH
Q12
RADIO B+
SWITCHING
Q13
D21
OSC
BUFFER
Q14
CT2, L1
L2
FM/TV(2 – 6CH)
TRACKING
TV(7 – 13CH)/WEATHER
TRACKING
CT5, L5
AM TRACKING
CT5
D3
(1/2)
L5
AM FERRITE-ROD
ANTENNA
L6
AM VCO VOLTAGE
L6
AM OSC
D3
(2/2)
CT4, L3
CT3, L4
FM/TV(2 – 6CH)
VCO VOLTAGE
TV(7 – 13CH)/WEATHER
VCO VOLTAGE
VT B+
LOW-PASS
FILTER
ANT