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Diagrams; Block Diagram - Tuner Section; Block Diagram - Main Section - Sony WM-FX673 Service Manual

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SECTION 6
Q Q

DIAGRAMS

7
3
6-1.
BLOCK DIAGRAM – TUNER Section –
FM RF AMP, MIX AMP, OSC
IC1
CF1
RF
MIX
10.7MHz
ANT
IN
OUT
RF
MIX
FM IF AMP
A
B.P.F.
1
6
AMP
AMP
Q7, 14
(Page 18)
OSC
LOCAL/DX
SWITCHING
Q3
8
5
L2
L2
FM OSC
FM VCO VOLTAGE
D1
D2
L5
AM MIX AMP, OSC
AM
IC2 (2/2)
T2
FERRITE-ROD
AM IF
ANTENNA
AM
MIX
RF IN
AM RF AMP
MIX
OUT
24
4
Q10
AMP
OSC
D3 (1/2)
L5
T1
AM
AM
2
TRACKING
VCO VOLTAGE
T
E
L
1
3
9
T1
AM OSC
FM VCO
BUFFER
Q1, 4
D3 (2/2)
LOW-PASS
FILTER
Q5, 6
65
70
71
66
IF IN
SYSTEM CONTROLLER
IC3 (1/2)
MONO/ST
• SIGNAL PATH
: FM
: AM
R-CH: Same as L-CH
05
w w w
– 15 –
1
5
1
6
3
X1
10.7MHz
FM/AM IF AMP,FM/AM DET, MPX
IC2 (1/2)
7
FM IF
IN
DET
FM
FM
3
AF
OUT
MPX IN
FM
LOUT
IF AMP
DET
22
20
AMP
PRE
DECODER
AM
ROUT
AMP
AMP
PILOT IN
AM
21
SWITCH
IF IN
AM
AM
6
IF AMP
DET
1/2
PD1
COUNTER
1/2
PD2
COUNTER
VCO
STOP
AGC
PULSE
18
19
16
17
11
10
CF2
RV1
FM B+
450kHz
FM VCO
Q11
SWITCHING
RF B+
Q13
4
2
2
9
6
5
1
3
IF BUFFER
64
Q2
STEREO/MONO
68
SWITCHING
Q12
x
a
o
y
.
i
– 16 –
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6-2.
BLOCK DIAGRAM – MAIN Section –
5
0
TUNER L-CH
B
(Page 16)
AUDIO MASTER AMP
(FWD/REV SELECT, PLAYBACK EQ AMP)
HP901
IC301 (1/3)
(PLAYBACK)
FWD
IN-L
L-CH
1
TUNER L-CH
PREAMP
14
B
BUFFER
5
FWD
Q18
REV
15
R-CH
(Page 17)
IN-L
R-CH
R-CH
METAL
R-CH
CONTROL
MUTING
Q19
L-CH
REV
DDC2 CTL
44
46
C
R-CH
R-CH
(Page 18)
S1
FWD
(DIRECTION)
STOP
REV
(TAPE DETECT)
44
29
52
Q
Q
3
7
6
MUTE
D
(Page 18)
47
LIQUID CRYSTAL DISPLAY
ND1
3
EEPROM
ROTATION DETECT
SENSOR
PH1
DDC B+
PHOTO REFLECTOR
PHOTO IN 39
SWITCH & BUFFER
Q15
u
1
6
3
PHOTO CTL 38
.
PLUNGER
PM901
PM CTL
60
DRIVE
(PLUNGER)
Q16, 17
05
http://www.xiaoyu163.com
2
4
8
9
9
B+ SWITCH
DDC B+
Q304
DOLBY NR
AUDIO MASTER AMP
AMP
(BASS BOOST AMP, AMS, POWER AMP)
IC302
RV301
IC301 (2/3)
14
VOL
VCC
PRE
PW
POWER AMP
OUT-L
IN-L
+
7
4
IN-L OUT-L
5
28
SW
EQ
R-CH
MTL
13
DRV-L
PW
R-CH
8
IN-C
32
AVLS CONTROL
BASS BOOST
SWITCH
BST
AMP
Q305
OUT
33
V/I
AMS
AGC
R-CH
IN
+
12
AMS
DET
S901-2
R-CH
(ATS)
40
43
35
MEGA BASS/
GROOVE
SWITCHING
R-CH
Q302
S901-1
59
54
23
57
37
55
3
1
5
1
5
0
8
9
2
SYSTEM CONTROLLER,
LIQUID CRYSTAL DISPLAY DRIVER
IC3 (2/2)
48
46
36
51
74
75
24
50
61
X2
75kHz
RV601
4
2
1
TAPE SPEED
Q601
SPEED
CONTROL
SWITCH
THP601
IC4
COMPARATOR
IN+
OUT
+
10
11
VSP
9
SPEED
7
CONTROL
VREF
M601
(CAPSTAN/REEL)
U
19
BIAS
MOTOR
SWITCH &
OSC
START
V
REFERENCE
1
DRIVE
LOGIC
8
W
CIRCUIT
3
CIRCUIT
CIRCUIT
VOLTAGE
U
W
V
DIRECTION CONTROL
m
CAPSTAN/REEL
MOTOR DRIVE
IC601
c
o
6
5
– 17 –
WM-FX673/FX877
2
8
9
9
ANT
A
(Page 15)
J701
• SIGNAL PATH
2 REMOTE
: PLAYBACK
PW OUT-L
+
20
: TUNER (FM/AM)
POWER AMP
R-CH: Same as L-CH
PW OUT-R
+
22
PW OUT-C
21
POWER AMP
BEEP
PW
BATT B+
VCC
NF-L
29
DATA
EQ-L
30
REMO
GND
39
45
42
41
MUTE
D
A/D REF B+
(Page 16)
REVIVE/GROOVE
SWITCHING
Q303
COMPARATOR
IC5
56
49
27
58
28
31 34
67
4
9
8
2
9
9
S3 – 10
S2
HOLD
OFF
KEY IN 43
HOLD
HOLD SENS 35
HOLD SW 41
BATT B+
40 62
30
(1.5V)
FM B+
B+ SWITCH
RIPPLE FILTER
(FM TUNER CIRCUIT B+)
Q9
Q301
18
RF B+
BASE
FM/AM TUNER
RF
CIRCUIT B+
OUT
VCC
17
RIPPLE FILTER
19
+1.6V
A/D REF B+
REGULATOR
AUDIO MASTER AMP
IC6
(RIPPLE FILTER)
IC301 (3/3)
RADIO B+
B+ SWITCH
FM/AM TUNER
Q8
CIRCUIT B+
(BATTERY CASE)
DC/DC
2
5
DDC B+
CONVERTER
DRY BATTERY
(2.5V)
IC801
SIZE "AA"
Q20
(IEC DESIGNATION R6)
3
1PC. 1.5V
D804
DC/DC
B+ SWITCH
VT B+
CONVERTER
Q804, 805
PLL LOW-PASS FILTER
T801, Q801
DC IN 1.5V
CIRCUIT B+
D803
D802
POWER
CONTROL
Q802, 803
RECHARGEABLE
BATTERY
(NI-CD)
(NC-6WM 1.2V)
DDC2 CTL
C
(Page 16)
– 18 –

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