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

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
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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 –