Block Diagram - Tuner Section - Sony CFD-E55L Service Manual

Q Q
3 7 6 3 1 5 1 5 0
6-2. BLOCK DIAGRAM – TUNER Section –
MAIN BOARD (1/3)
ANT1
FM TELESCOPIC
ANTENNA
CNP1
1
B.P.F.
FL1
CT1, L1
L1
FM TRACKING FM RF
CT1
CT2, L3-1 CT3, L3-2
L3
MW LW
MW/LW FERRITE-ROD
TRACKING TRACKING
ANTENNA
Q6
LW SWITCH
L3-1
MW
CT3
CT2
B+
Q6
T E
L 1 3 9 4 2 2 9 6 5 1 3
L3-2
LW
Q4
Q5
Q4, 5
MW SWITCH
X1
75kHz
w w w
• SIGNAL PATH
: FM
: MW/LW
.
R-CH: Same as L-CH.
05
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FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
FM RF
IN
FM FM MIX OUT
2
RF AMP MIX
FM
FM
RF OUT
24 OSC
D1
AM RF
IN
AM AM
22
RF AMP MIX
OSC
BUFFER
OUT
19
AM
D3
BUFFER
OSC
(1/2)
20 21
L4 L2
LW VCO VOLTAGE FM VCO VOLTAGE
L4
L2
MW/LW OSC
FM OSC
Q7
LW
SWITCH D2
D3
(2/2)
CONSTANT
MW BAND LW BAND
CURRENT
SELECT SWITCH SELECT SWITCH
Q3
Q8 Q9
FM/AM PLL
IC2
7 6 19
LOW-PASS
FILTER
XOUT
21
REFERENCE
DIVIDER
XIN
20
UNLOCK
DETECT
x a o u 1 6 3
y
i
– 19 –
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8
CF3
10.7MHz
10
CF1, 2 FM
10.7MHz
IF IN
FM IF FM
4 7
AMP DET
T1
IFT
CF4
AM
450kHz
IF IN
AM IF AM
6
AMP DET
T1
AM IF
IF
BUFFER
17
Q Q
3 7 6 3 1
18 17 13 12 11
UNIVERSAL
COUNTER
PHASE
DETECTOR/
CHARGE PUMP
1/2
12 BIT
SWALLOW
PROGRAMMABLE
COUNTER
DIVIDER
SHIFT REGISTER & LATCH
.
2 4
9 9 8
DET MPX
OUT IN
AF AF
16 15 MPX
BUFFER AMP
AM HIGH
CUT
SWITCH
Q1
LEVEL
DET
ST
IND
18 13
5 1 5 0 8 9 2 4
IF REQUEST
SWITCH
Q2
9 10 8 14
DI
3
CL
4
CCB
CE
INTERFACE
2
DO
5
m
c o
– 20 –
CFD-E55L
2
9 9
TO MAIN SECTION
(Page 21)
C
L-OUT
12
MUTE
R-OUT
11
R-CH
STEREO/
MONO,
FM/AM
14
9 8 2 9 9
FROM MAIN SECTION
(Page 21)
B-MUTE
D
CNP312
TO MAIN
2
R-DATA
SECTION
(Page 21)
3
R-CLOCK
E
1
R-LATCH
4
R-COUNT