Sony Walkman WM-FX277 - Block Diagram

1111
WM-FX277
5-2. BLOCK DIAGRAMS
• Abbreviation
MX : Mexican
CH : Chinese
E : Indication of country of origin (ST/FM MONO)
9E : No Indication of country of origin
5E, 6E : Indication of country of origin (DX/LOCAL)
TW : Taiwan
• Signal path.
F : FM
f : AM
E : PB
LCH
RCH
VREF
VREF
REV IN(L)
REV IN(R)
FWD IN(R)
FWD IN(L)
AVLS
NORM
LIMIT
VOLUME
POWER IN(L)
MIX OUT(L)
R-CH
W
V
U
CAPSTAN/REEL
MOTOR
COM
W OUT
V OUT
U OUT
TAPE
SPEED
DRY BATTERY
SIZE "AA"
2PCS, 3V
32-44
45-48
S1-13
COM1-4
LIQUID CRYSTAL
ND701
SYSTEM
CONTROL
X IN
X OUT
R-CH IS OMITTED:SAME AS L-CH
3-6
7-9
PA0-3
PB1-3
DC-DC
CONVERTER
Q401
LOCAL
DX
FRONT-END,
IF,DET,FM MPX
CrO2/METAL
S303-2
HOLD
FM IN
AM IN
LPF OUT
LPF IN
E.O
SD
BAND
MEGA BASS
MUTE
PRE CTL
MOTOR CTL
BEEP
TAPE
RESET
RADIO ON
BATT REF
BATT CHECK
AMP ON
ID
VREF
S/S
PRE OUT(L)
PRE NF(L)
VSP
IN+
M VREF
L.B SW
MIX IN(L)
H.PIN(L)
SYSTEM
POWER OUT(L)
POWER OUT(COM)
POWER MUTE
OUT
MOTOR CONTROL
REF VOLTAGE
FOR SPEED CONTROL
CURRENT
DETECT
WAVE-
FORME
DETECT
SOFT
SWITCH
PRE
DRIVER
BIAS
R-CH
R-CH
HEAD
PLAYBACK
HP601
IC301
NORM
AM
IN
FM
RF
FM
OSC
AM
OSC
L-0
R-0
TUN
LED
FM
IF
AM
IF
FM
IN
FM/AM
MIX
LPF2
LPF1
IN
OUT
MPX
DET
AM
AM
AM
QUAD
AM
ANTENNA
L1
RF
FM
L2
FM
L3
OSC
OSC
+
L4
AM
BATT
BATT
IC702
BATT
IC1
R-CH
FM MONO
STEREO
(ON)
(OFF)
HOLD
FM/AM
PB AMP,
POWER AMP
(IEC DESIGNATION LR6)
S710-712
S708,709
S705,706
S702,703
KEY MATRIX
DISPLAY
FERRITE CORE
SYSTEM
CONTROL
LOW BOOST
MIX
AMP
AMP
POWER
VREF
COM
VCC
EQ
SWITCH
Q301
FM
FRONT-END
FM
OSC
FRONT-END
OSC
FM
MPX
DET
DET
TU +2.6V
TU +2.6V
BPF
TU +2.6V
TU +2.6V
TU +2.6V
SWITCH
Q701
REG
Q501,502
TU +2.6V
VCC
INITIAL
RESET
+1.5V REG
IC701
OSC AMP
Q1,2
FM
TRACKING
AM
FREQUENCY
COVERAGE
TRACKING
AM
FREQUENCY
COVERAGE
FM
L1,CT1
L2
L3
L4
TU +2.6V
LPF1
5E,6E,MX
5E,6E,MX
E,9E,TW,CH
E,9E,TW,CH
E,9E,TW,CH