Block Diagram - Tuner Section - Sony CFD-E77L Service Manual

CFD-E77L
Q Q
3 7 6 3 1 5 1 5 0
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
T E
L 1 3 9 4 2 2 9 6 5 1 3
Q41
Q41, 42
MW SWITCH
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: FM
w w w
: 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
CT5, L3-2 D1
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
21
X1 REFERENCE
75kHz DIVIDER
XIN
20
x a o
y
. i
http://www.xiaoyu163.com
CF2 FM
10.7MHz IF IN
MIX OUT FM IF
4 7
AMP
T1
AM IFT
CF4
AM
450kHz
IF IN
AM IF
6
AMP
T1
AM IF
BUFFER
OSC
OUT
19
L2
Q Q
3 7 6
L2
FM OSC
CONSTANT
TC POWER
CURRENT
B+
Q61 D321
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
u 1 6 3
.
20 20
http://www.xiaoyu163.com
2 4
8 9 9
T2
FM IFT
T2
FM IF
10
DET MPX
FM
OUT IN
AF AF
DET
MPX
16 15
BUFFER AMP
AM HIGH
CUT
SWITCH
Q12
AM
DET
LEVEL
DET
ST
IF
IND
17 18 13
3 1 5 1 5 0 8 9 2
10 8 9 7 13
UNIVERSAL
COUNTER DI
2
CL
3
CCB
CE
INTERFACE
1
DO
4
m
c o
2
8 9 9
L-OUT
TU L-OUT
B
12
MUTE
R-OUT (Page 21)
11 R-CH
STEREO/
MONO,
FM/AM
14
4 9 8 2 9 9
R-MUTE
C
(Page 21)
R-DATA, R-CLOCK,
R-CE, R-COUNT
R-DATA
D
R-CLOCK
(Page 21)
R-CE
R-COUNT