Sony Walkman WM-FX141 Service Manual page 18
Radio cassette player
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Also See for Walkman WM-FX141:
- Service manual (24 pages) ,
- Operating instructions (2 pages)
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SECTION 2
Q Q
DIAGRAMS
7
3
2-1. BLOCK DIAGRAM
S303(2/2)
DX → LOCAL
Q1
DX/LOCAL
SWITCH
IC1
FM/AM,RF/AF AMP
BPF
CP1
18
17
DET OUT
MPX IN
1
FM RF IN
CV1
AM
CT1
TRACKING
24
L OUT
AM RF IN
CF2
L1
8
FM IF IN
CV2
FM
CT2
R OUT
TRACKING
L2
23
FM RF OUT
T1
CF1
7
AM IF IN
CV3
FM
FM/AM MIX
4
QUAD
VCC2
FREQ.
CT3
COVER
12
6
L3
21
FM OSC
AM IF
CV4
AM
CT4
X2
FREQ.
T
E
L
1
3
10.7MHz
9
COVER
L4
20
AM OSC
VCC1
22
w w w
— 3 —
1
5
1
6
3
14
IC301
HP901
AUDIO AMP
13
MOTOR DRIVE
PLAYBACK
HEAD
28
25
24
L
LP2
RV301
16
VOLUME
2
5
6
R
4
2
2
9
6
5
1
3
16
+
RV601
M
TAPE SPEED
–
13
M901
REEL/CAPSTAN
23
22
17
20
MOTOR
S303(1/2)
(TAPE SEL)
CrO2/METAL ← NORM
Q301
SWITCH
S304
(FUNCTION)
FM → AM → TAPE
Q302
AM/FM SELECT
SWITCH
x
a
o
y
.
i
— 4 —
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WM-FX141
5
0
2-2. IC BLOCK DIAGRAM
IC1 TA2111F-EL
FM OSC
AM OSC
FM MIX
AM MIX
AGC
FM
RF
J302
18
PHONES
2
↓
S305
1
9
AVLS
↓
OFF
8
Q
Q
3
7
6
3
19
J301
S302
POWER
DC IN 3V
u
• Signal path
1
6
3
: FM
: AM
.
E : PB
http://www.xiaoyu163.com
2
4
8
9
9
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
specified.
•
¢
: internal component.
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
AF
supply from external power voltage jack (J301) .
• Voltages and waveforms are dc with respect to ground
FM
IF
DECODE
under no-signal (detuned) conditions.
no mark : FM
VCO
(
) : PB
DIVIDE
FM
MUTE
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
LEVEL
ST/MO
tion tolerances.
AM DET
FM DET
DET
FM/AM
• Waveforms are taken with a oscilloscope.
• Signal path.
F
: FM
AM
FM
IF
IF
f
: AM
TUNE
ST
E
: PB
LED
LED
1
5
1
5
0
8
9
2
m
c
o
— 5 —
2
8
9
9
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
®
: Through hole.
• b : Pattern from the side which enables seeing.
1
/
W or less unless otherwise
4
4
9
8
2
9
9
— 6 —
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