Diagrams; Block Diagram - Tuner Section - Sony WM-FX888 Service Manual

Q Q
3 7 6 3 1 5 1 5 0
6-1. BLOCK DIAGRAM – TUNER Section –
FM RF AMP, MIX AMP, OSC
IC1
RF
ANT IN
RF
A
B.P.F. 1
AMP
(Page 14)
LOCAL/DX
SWITCHING
Q3
8
D1
L5
AM FERRITE-ROD
ANTENNA
AM RF AMP
Q10
D3 (1/2)
T E
L 1 3 9 4 2 2 9 6 5 1 3
65
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: FM
: AM
w w w
.
SECTION 6

DIAGRAMS

CF1
MIX
10.7MHz
OUT
MIX FM IF AMP
6
AMP Q7, 14
OSC
5
L2
L2
FM OSC
FM VT VOLTAGE
D2
AM MIX AMP, OSC
IC2 (2/2)
T2
AM IF
AM
MIX
RF-IN
MIX
24 4
AMP
OSC
T1
AM
2
VT VOLTAGE
T1
AM OSC
D3 (2/2)
FM VCO
BUFFER
Q1, 4
LOW-PASS
FILTER
Q5, 6
70 71 66
IF-IN
SYSTEM CONTROLLER
IC3 (1/2)
MONO/ST
x a o
y
i
http://www.xiaoyu163.com
8
X1
10.7MHz
FM/AM IF AMP, FM/AM DET, MPX
7
FM
DET
IF-IN
FM FM
3
OUT
AF
IF AMP DET
22
AMP
AM
IF-IN
AM AM
6
IF AMP DET
STOP
AGC
PULSE
11 10
CF2
450kHz
Q Q
3 7 6 3
IF BUFFER
64
Q2
STEREO/MONO
68 SWITCHING
Q12
u 1 6 3
.
13 13
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2 4
9 9 8
IC2 (1/2)
MPX IN FM L-OUT
20 14
PRE
DECODER
AM
R-OUT
AMP
AMP
15
PILOT IN
21
SWITCH
1/2
PD1
COUNTER
1/2
PD2
COUNTER
VCO
18 19 16 17
RV1
FM B+
FM VCO
Q11
SWITCHING
1 5 1 5 0 8 9 2 4
RF B+
Q13
m
c o
WM-FX888
2
9 9
TUNER L-CH
B
BUFFER
Q18
R-CH
(Page 14)
MUTING
Q19
DDC2 CTL
C
(Page 14)
9 8 2 9 9
MUTE
D
(Page 14)