Block Diagram - Tuner Section - Sony CFD-E75L Service Manual

CFD-E75L
6-2. BLOCK DIAGRAM – TUNER Section –
TUNER BOARD
ANT1
FM TELESCOPIC
ANTENNA
D10 D11
L1
FM RF
CT1, L1
FM TRACKING CT1
D1
CT3, L3-1 CT5, L3-2
L3
MW LW
MW/LW FERRITE-ROD
TRACKING TRACKING
ANTENNA
Q43
LW SWITCH
L3-1
D3
MW
(1/2)
CT5
CT3
B+
Q43
L3-2
LW
Q42
Q41
Q41, 42
MW SWITCH
XOUT
21
X1
75kHz
XIN
20
• 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 MIX OUT
FM FM
2 4
RF AMP MIX
FM
FM
RF OUT
24 OSC
AM RF
IN
AM AM
22
RF AMP MIX
OSC
BUFFER
OUT
19
AM
BUFFER
OSC
20 21
L4 L2
LW VCO VOLTAGE FM VCO VOLTAGE
L4 L2
MW/LW OSC FM OSC
Q44
LW
SWITCH
D3
(2/2)
D2
CONSTANT
CURRENT
Q61
LOW-PASS
MW BAND
FILTER
SELECT SWITCH
Q14
FM/AM PLL
IC2
6 18 17 16
LOW-PASS
FILTER
REFERENCE
PHASE
DIVIDER
DETECTOR/
CHARGE PUMP
12 BIT
UNLOCK
PROGRAMMABLE
DETECT
DIVIDER
T2
FM IFT
T2
FM IF
10
CF2
FM
10.7MHz
IF IN
FM IF FM
7
AF
AMP DET
BUFFER
T1
AM IFT
CF4
AM
450kHz IF IN
AM IF AM
6
AMP DET
T1
LEVEL
DET
AM IF
IF
BUFFER
17
12 11 10
UNIVERSAL
COUNTER
1/2
SWALLOW
COUNTER
SHIFT REGISTER & LATCH
20 20
L-OUT
DET MPX
12
OUT IN
AF
16 15 MPX MUTE
AMP R-OUT
11
AM HIGH
CUT STEREO/
SWITCH MONO,
Q12 FM/AM
ST
IND
18 13 14
R-MUTE
8 9 7 13
DI
2
R-CLOCK
CL
3
CCB
CE
INTERFACE
1
DO R-COUNT
4
MAIN BOARD
(2/4)
CN321 CNP322
CNP1 (1/2) (2/5)
6
6 1
L-CH L-CH
B
TO MAIN
R-CH
SECTION
(Page 21)
11
2
VT
C
FROM MAIN
SECTION
(Page 21)
8
R-DATA
9
7
R-CE
10