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CFD-E90L
6-2.
BLOCK DIAGRAM – TUNER Section –
ANT1
FM TELESCOPIC
ANTENNA
D10
D11
L1
FM RF
FM TRACKING
CT3, L3-1
L3
MW
MW/LW FERRITE-ROD
TRACKING
ANTENNA
L3-1
MW
B+
L3-2
LW
Q41
Q41, 42
MW SWITCH
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: FM
: MW/LW
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
FM RF-
IN
FM
FM
2
RF AMP
MIX
FM
FM
RF-OUT
24
OSC
CT1, L1
CT1
D1
CT5, L3-2
LW
AM RF-
TRACKING
IN
AM
AM
22
RF AMP
MIX
BUFFER
Q43
LW SWITCH
AM
D3
BUFFER
OSC
(1/2)
CT5
CT3
20
21
Q43
L4
LW VCO VOLTAGE
FM VCO VOLTAGE
L4
MW/LW OSC
Q42
Q44
LW
SWITCH
D3
(2/2)
D2
MW BAND
SELECT SWITCH
Q14
FM/AM PLL
IC2
6
18
XOUT
20
X1
REFERENCE
75kHz
DIVIDER
XIN
19
FM
IF-IN
MIX-OUT
CF2
FM IF
4
7
AMP
T1
AM IFT
AM
CF4
IF-IN
AM IF
6
AMP
T1
AM IF
BUFFER
OSC-
OUT
19
L2
L2
FM OSC
CONSTANT
CURRENT
+9V
Q61
D930
LOW-PASS
FILTER
17
16
12
11
LOW-PASS
FILTER
PHASE
DETECTOR/
CHARGE PUMP
1/2
12 BIT
UNLOCK
SWALLOW
PROGRAMMABLE
DETECT
COUNTER
DIVIDER
SHIFT REGISTER & LATCH
20
20
T2
FM IFT
T2
FM IF
10
DET-
MPX-
FM
OUT
IN
AF
AF
DET
16
15
MPX
BUFFER
AMP
AM HIGH
CUT
SWITCH
Q12
AM
DET
LEVEL
DET
IF
ST
IND
17
18
13
10
8
9
7
13
UNIVERSAL
COUNTER
DI
2
CL
3
CCB
CE
INTERFACE
1
DO
4
L-OUT
TU L-OUT
B
12
MUTE
R-OUT
(Page 21)
11
R-CH
STEREO/
MONO,
FM/AM
14
R-MUTE
C
(Page 21)
R-DATA, R-CLOCK,
R-CE, R-COUNT
R-DATA
D
R-CLOCK
(Page 21)
R-CE
R-COUNT
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