Block Diagram - Tuner Section - Sony CFD-S28L Service Manual
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Also See for CFD-S28L:
- Operating instructions manual (68 pages) ,
- Service manual (50 pages)
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CFD-S28L
6-2.
BLOCK DIAGRAM – TUNER Section –
TUNER BOARD (1/2)
ANT1
FM TELESCOPIC
ANTENNA
B.P.F.
FL1
CT1, L1
L1
FM TRACKING
FM RF
CT1
CT3, L3-1
CT5, L3-2
L3
MW
LW
TRACKING
TRACKING
MW/LW FERRITE-ROD
ANTENNA
Q43
L3-1
LW SWITCH
MW
CT5
CT3
B+
Q43
L3-2
LW
Q41
Q42
Q41, 42
MW SWITCH
X1
75kHz
• SIGNAL PATH
: FM
: MW/LW
05
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
FM RF
FM/AM
IN
MIX OUT
FM
FM
2
4
RF AMP
MIX
FM
FM
RF OUT
24
OSC
D1
AM RF
IN
AM
AM
22
RF AMP
MIX
OSC
BUFFER
OUT
19
AM
BUFFER
OSC
D3
(1/2)
20
21
L4
L2
LW VCO VOLTAGE
FM VCO VOLTAGE
L4
L2
MW/LW OSC
FM OSC
Q44
D2
LW
D3
SWITCH
(2/2)
LOW-PASS
FILTER
Q61
MW BAND
LW BAND
SELECT SWITCH
SELECT SWITCH
Q40
Q2
FM/AM PLL
IC2
7
6
19
LOW-PASS
FILTER
XOUT
21
REFERENCE
DIVIDER
XIN
20
UNLOCK
DETECT
– 19 –
CF3
10.7MHz
10
CF1, 2
FM
10.7MHz
IF IN
FM IF
FM
7
AMP
DET
T1
IFT
CF4
AM
450kHz
IF IN
AM IF
AM
6
AMP
DET
T1
LEVEL
AM IF
IF
BUFFER
17
Q13
IF REQUEST
SWITCH
18
17
13
12
11
UNIVERSAL
COUNTER
PHASE
DETECTOR/
CHARGE PUMP
1/2
12 BIT
SWALLOW
PROGRAMMABLE
COUNTER
DIVIDER
SHIFT REGISTER & LATCH
DET
MPX
IN
OUT
AF
AF
16
15
MPX
BUFFER
AMP
Q12
AM HIGH
CUT
SWITCH
DET
ST
IND
18
13
14
9
10
8
14
DI
3
CL
4
CCB
CE
INTERFACE
2
DO
5
– 20 –
CNP2
(1/2)
7
LOUT
L-CH
12
B
MUTE
ROUT
6
R-CH
11
(Page 21)
STEREO/
MONO,
FM/AM
CNP1
5
R-MUTE
C
(Page 21)
1
R-DATA
3
R-CLOCK
2
R-LATCH
4
R-COUNT
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