Sony Walkman WM-FX271 User manual

– 1 –
MICROFILM
SERVICE MANUAL
US Model
WM-FX271/FX275
Canadian Model
AEP Model
E Model
Chinese Model
WM-FX271
WM-FX271/FX275
RADIO CASSETTE PLAYER
Photo: WM-FX271
Frequency range
FM: 65 – 74/87.5 – 108 MHz (East European)
87.5 – 108 MHz (Except East European)
AM:530 – 1,710 kHz (US, Canadian)
531 – 1,602 kHz (Except US, Canadian)
Power requirements
3 V DC batteries R6 (AA) ×2/External DC 3 V power sources
Dimensions
91.4 ×115.5 ×35.9 mm (3 5/8 ×4 5/8 ×1 7/16 inches) (w/h/d) incl.
projecting parts and controls
Mass
Approx. 150 g (5.3 oz.)
Approx. 230 g (8.2 oz.) incl.batteries and a tape
Supplied accessories
Stereo headphones or Stereo earphones (1)/Carrying case (1)
Design and specifications are subject to change without
notice.
SPECIFICATIONS
Model Name Using Similar Mechanism WM-FX171
Tape Transport Mechanism Type MF-WMFX171-114
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270˚C during
repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Ver 1.0 1999. 02

– 2 –
TABLE OF CONTENTS
1. GENERAL ........................................................................... 3
2. DISASSEMBLY
2-1. Cabinet (Front) Sub Assy .................................................... 4
2-2. Main Board ......................................................................... 5
2-3. Holder (Sub) Assy, Cassette ................................................ 5
2-4. Mechanism Deck................................................................. 6
2-5. Belt and Motor .................................................................... 6
3. MECHANICAL ADJUSTMENTS ................................. 7
4. ELECTRICAL ADJUSTMENTS
Tape Section ............................................................................ 7
Tuner Section........................................................................... 8
5. DIAGRAMS
5-1. IC Pin Description............................................................. 10
5-2. Block Diagram .................................................................. 11
5-3. Printed Wiring Board ........................................................ 13
5-4. Schematic Diagram ........................................................... 15
6. EXPLODED VIEWS
6-1. Cabinet Section ................................................................. 18
6-2. Tape Mechanism Section-1 ............................................... 19
6-3. Tape Mechanism Section-2 ............................................... 20
7. ELECTRICAL PARTS LIST ........................................ 21

– 3 –
SECTION 1
GENERAL This section is extracted
from instruction manual.

– 4 –
SECTION 2
DISASSEMBLY
2-1. CABINET (FRONT) SUB ASSY
Note : When installing, fit the knobs and switches.
Cabinet (front) sub assy Main boardSet Holder (sub) assy, cassette Belt and Motor
Mechanism deck
1 Insert the precision screwdriver
(1.4 mm flat-blade) into the slit
at claw A and release the claw.
2 Remove the cabinet (front) sub assy.
(Release all claws B to N in
alphabetical order.)
• The equipment can be removed using the following procedure.
A
cabinet (front) sub assy
holder (sub) assy, cassette
B
C
D
E
FHI
J
K
S71
6
G
L
M
N
cabinet (front) sub assy
Note :When removing the cabinet, put cloth
on the end of a screwdriver or use a
polyacetal driver to avoid damage to
the cabinet.
Note : Follow the disassembly procedure in the numerical order given.

– 5 –
2-2. MAIN BOARD
4 two claws
1 HEAD FLEXIBLE board (CN301)
2 Unsolder the 4 places.
5 MAIN board
3 screw (M1.4), toothed lock (WH)
1 Open the holder (sub) assy, cassette.
4 holder (sub) assy, cassette.
A
B5
spring (torsion
)
2-3. HOLDER (SUB) ASSY, CASSETTE
2 Insert a precision screwdriver
(1.4 mm flat-blade) vertically
into portion A to release the
hinge plate.
3 Portion B to release the
hinge plate.

– 6 –
2-4. MECHANISM DECK
2-5. BELT AND MOTOR
1 Insert the precision screwdriver
(1.4 mm flat-blade) into the slit
and release three claws.
2 Remove the mechanism deck
in the direction of the arrow.
• How to apply the belt
1 belt
3 motor
2 two screws (screw (M1.4), special head)
wheel assy (NP), capstan
belt
M901

– 7 –
0000
2 jack (J301)
digital frequency
counter
set
16
Ω
test tape
WS-48A
(3 kHz, 0 dB)
PRECAUTION
• Supplied voltage : 2.5V
• Switch and control position
VOLUME control : maximum
AVLS switch : NORM
• Test Tape
Type Signal Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
TAPE SECTION 0 dB = 0.775 V
Tape Speed Adjustment
Procedure:
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head pinch lever assy
capstan wheel assy rubber belt
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage (2.5V) unless otherwise noted.
Torque Measurement
Mode Torque meter Meter reading
FWD CQ-102C 20 – 42 g • cm
(0.28 – 0.58 oz • inch)
FWD CQ-102C less than 2 g • cm
Back Tension (less than 0.03 oz • inch)
FF, REW CQ-201B more than 60 g • cm
(more than 0.83 oz • inch)
SECTION 4
ELECTRICAL ADJUSTMENTS
SECTION 3
MECHANICAL ADJUSTMENTS
1. Playback WS-48A (tape center part) in the FWD state and
adjust RV601 so that the frequency counter reading
becomes 3,000 Hz.
Specification Value:
Digital frequency counter
2,985 to 3,015 Hz
Adjustment Location:
RV601

– 8 –
2 jack (J301)
set
16
Ω
level meter
(range: 0.5-5 V ac
)
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
digital
voltmeter
TP (VT)
Main board
• Repeat the procedures in each adjustment several times, and the
tracking adjustment should be finally done by the trimmer ca-
pacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
1,000 (999) kHz
( ): Except US, Canadian model
AMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
620 (621) kHz 1,400 (1,395) kHz
( ): Except US, Canadian model
TUNER SECTION 0 dB = 1 µV
• FM Section
Setting:
RADIO ON/OFF switch: ON
BAND switch : FM
FM Tuning Voltage Adjustment
FM TUNING VOLTAGE ADJUSTMENT
Adjust for a 8.5 ± 0.3 (14.5 ± 0.5)Vdc reading on digital voltmeter.
L3
108 MHz
FMTracking Adjustment
Modulation: 1 kHz, 75 kHz dev. (100%)
Output level: as low as possible
digital
voltmeter
TP (VT)
Main board
FM RF signal
generator
0.01 µ F(FM RF IN)
Main boar
d
(GND)
2 jack (J301)
set
16
Ω
level meter
(range: 0.5-5 V ac
)
FMTRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
87.5 (65.0) MHz
( ): East European model
• AM Section
Setting:
RADIO ON/OFF switch: ON
BAND switch : AM
AMTuning Voltage Adjustment
AMTUNING VOLTAGE ADJUSTMENT
Adjust for a 1.1 ± 0.1 Vdc reading on digital voltmeter.
L4
530 (531) kHz
( ): Except US, Canadian model
AM IF Adjustment, AMTracking Adjustment
Modulation: 400Hz, 30%
Output level: as low as possible

– 9 –
L3
FM TUNING
VOLTAGE
ADJUSTMENT
L2
FM TRACKING
ADJUSTMENT
L4
AM TUNING
VOLTAGE
ADJUSTMENT
T1
AM IF
ADJUSTMENT
CT1
AM TRACKING
ADJUSTMENT
L1
Adjustment Location: main board
Measurement Points: main board
(FM RF IN)
(VT)
FM RF INVT

– 10 –
5-1. IC PIN DESCRIPTION
• IC701 µPD17072GB-559-1A7 (SYSTEM CONTROL/LCD DRIVE)
Pin No. Pin Name I/O Pin Description
1 INIT O Initialize output
2, 3 NC — Not used.
4 MEGA BASS O MEGA BASS ON/OFF output (L: ON, H: OFF)
5 RADIO-ON O Radio circuit power control output
6 – 8 KEY OUT1 – 3 O Key matrix output 1 – 3
9 NC — Not used.
10, 11 KEY IN1, 3 I Key input 1, 3
12, 13 BTT-REF1, 2 I Reference voltage input for battery voltage check.
14 MUTE OUT O Mute output (Mute ON: L, Mute OFF: input)
15 SD I SD (with local) signal input
16 BAND O Radio band select output (AM: L, FM: input)
17 HOLD I Key hold input (Key input effect: L, Key input ineffect: H)
18 GND — Ground
19 EO O PLL error out output
20 VCO (AM) I VCO (AM) input
21 VCO (FM/TV) I VCO (FM) input
22 VDD2 — Voltage regulator for PLL.
23 VDD1 — Power supply pin
24 XO — Crystal oscillator output (75 kHz)
25 XI — Crystal oscillator input (75 kHz)
26 VDD5 — Voltage regulator for oscillation circuit.
27 VDD3 — Power supply for LCD driver.
28, 29 CAP1, 2 — Stabilized capacitor connection of crystal oscillation power supply.
30 VDD4 — Power supply for LCD driver.
31 – 34 COM0 – 3 O LCD driver common output
35 – 49 LCD0 – 14 O LCD driver output
50 CE I L: Clock stop, H: Normally operation
51 TAPE ON I At TAPE ON: H
52 BEEP O BEEP output
53 NC — Not used.
54 KEY IN2 I Key input 2
55 NC — Not used.
56 KEY IN4 I Key input 4
SECTION 5
DIAGRAMS

5-2. BLOCK DIAGRAM
– 11 – – 12 –
WM-FX271/FX275
D2
D303
L OUT
R OUT
VCC2
QUAD
LPF1
FM/AM RF, IF, MPX
IC1
14
13
6
12
CF2
10.7MHz
X2
RADIO
+B
R CH R-CH
L
HP901
PLAYBACK
HEAD
L.P.F
Q701,702
TAPE
SPEED
RV601
SYSTEM CONTROL/
LCD DRIVE
IC701
RADIO
+B
CF1
450kHz
L2
FM RF
T1
AM IFT
BATT+B
DC/DC
CONV.
Q307, T301
RADIO+B
SWITCH
Q53
BAND
SWITCH
Q703
NF LEVEL
SWITCH
Q101
MIX
IN(L)
H.PIN(L)
FM/AM MIX
FM IN
1
4
MOTOR SERVO
IC301(2/2)
IN+ 35
M-V REF 34
UOUT
VOUT
WOUT
FM IF
8
AUDIO POWER AMP
IC301(1/2)
REV IN(L)
FWD IN(L)
NF
SYSTEM
6
15
AM IF
7
FM RF
23
FM OSC
21
AM OSC
20
AM IN
24
LPF2
15 TUN LED
10
KEY OUT1 KEY OUT3
HOLD
17
BTT-REF1
12
X OUT X IN
SYS CONT
HOLD
S701
FUNCTION
KEY
S701, 702, 704-708,
713, 715
VDD ON
OFF
B.P.F
CP1
DC IN
3V
J302
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS, 3V
D3
L3
FM OSC
L4
AM OSC
D1
CT1
D731
BATT+B
L1
AM
FERRITE-ROD
ANTENNA
R
FWD
+
–
9 5
POWER MUTE
21
19
REG
IC702 1
30
28
L.B-SW
32
MIX
OUT(L) RV301-1
24
POWER
IN(L)
PWR
R-CH
COM
L CH
R CH
22
POWER
OUT(L) 16
POWER
OUT(COM) 18
J301
68
35 49
LCD1
LCD14
X701
75kHz
BATT+B
M901
CAPSTAN/
REEL
MOTOR
31 34
COM1
04
LCD701
LIQUID CRYSTAL
DISPLAY PANEL
COM4
KEY IN1 KEY IN4
10,11,54,56
BEEP
52
MEGA BASS
4
MUTE OUT
14
RADIO-ON
5
BAND
16
EO
19
SD
15
3
2425
39
41
40
R-CH
DX
LOCAL
EXCEPT
US,CND,C&SA
ST
FM MONO
EXCEPT US,CND,C&SA
S303-2
VCO
BUFFER
Q2, 703
20
21
18
17
DET OUT
MPX IN
MUTE
Q306 TAPE +B
RADIO
+B NORM
CrO2/
METAL
AMP
+B BATT
+B
DOLBY B+
SWITCH
Q331
TAPE +B TAPE +B
S303-1
NORM
LIMIT
S305-1
AVLS
26
L. P2
BTT-REF2
13
S301
TAPE
POWER
VDD
INIT
1
S303-2
US,CND,C&SA
(COM)
TAPE +B
D701
AEP,2AEP,FR,CEV,CH
EE,E,9E
JR701
JR702
10
RADIO
+B
Q308
VCO(FM/TV)
VCO(AM)
VOLUME
∑
( )
• R-CH: same as L-CH
• Signal path
: FM
: AM
: PB
T1
AM IF
L2
FM
TRACKING
L3
FM
TUNING
VOLTAGE
L4
AM
TRACKING
CT1,L1
AM
TRACKING
• Abbreviation
CND : Canadian model
C&SA : Central and South America model
AEP : Headphone (MDR-E805LP) model
2AEP : Earphone (MDR-023) model
FR : French model
CEV : Poland, Czech, Greece and Turkey model
CH : Chinese model
EE : East European model
E : Indication of country of origin
9E : No indication of country of origin

1
A
B
C
D
E
F
G
H
I
2345678910111213
M901
CAPSTAN/REEL
MOTOR
M
HP901
PLAYBACK
HEAD
FWD
R
GND 6
GND 5
FWD (R) 4
FWD (L) 3
REF 2
GND 1
L
(FM RF IN)
(VT)
PANEL
C204
C104
C333
04
C&SA C&SA
19
, C&SA
C&SA C&SA
( )
( )
WM-FX271/FX275
– 13 – – 14 –
5-3. PRINTED WIRING BOARD
Note:
•Y: parts extracted from the conductor side.
•®: Through hole.
•b: Pattern from the side which enables seeing.
• Abbreviation
CND : Canadian model
CEV : Poland, Czech, Greece andTurkey model
CH : Chinese model
Ref. No. Location
D1 C-3
D2 C-6
D3 C-8
D301 I-9
D302 D-6
D303 F-10
D701 F-10
IC1 C-5
IC301 H-11
IC701 F-11
IC702 F-13
Q2 D-10
Q101 H-12
Q201 H-12
Q301 D-10
Q302 E-6
Q303 D-6
Q304 G-10
Q305 G-10
Q306 H-10
Q307 G-6
Q308 G-10
Q701 F-12
Q702 F-12
Q703 F-12
Q704 D-12
• Semiconductor
Location
2AEP :Earphone (MDR-023) model
EE : East European model
FR : French model
C&SA : Central and South America model
9E : No indication of country of origin
E : Indication of country of origin
AEP : Headphone (MDR-E805LP) model

(EE)
(EXCEPT EE)
– 15 – – 16 –
WM-FX271/FX275
Note:
• 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 Ωand 1/4W or less unless
otherwise specified.
• % : indicates tolerance.
•¢: internal component.
•C: panel designation.
5-4. SCHEMATIC DIAGRAM • Refer to page 17 for IC Block Diagrams.
•U: B+ Line.
•H: adjustment for repair.
• Total current is measured with no cassette
installed.
• Power voltage is dc 3V and fed with regulated
dc power supply from battery terminal.
• Voltage is dc with respect to ground under
no-signal (detuned) condition.
no mark : FM
( ) : AM
< > : PB
• Voltages are taken with a VOM (Input
impedance 10 MΩ).
Voltage variations may be noted due to normal
production tolerances.
• Signal path.
F: FM
f: AM
E: PB
• Abbreviation
CND : Canadian model
CEV : Poland, Czech, Greece andTurkey
model
CH : Chinese model
2AEP : Earphone (MDR-023) model
EE : East European model
FR : French model
C&SA : Central and South America model
9E :No indication of country of origin
E : Indication of country of origin
AEP : Headphone (MDR-E805LP) model

2
not
supplied
MF-WMFX171-114
1
3
14
5678
16
15
12 13
417
10
11
9
LCD701
L1
24
1 2
23 22 21 20
AGC
AM
DET
AM
MIX FM DET LEVEL DET
ST/MONO
FM/AM
TUN
LED ST LED
FM
MUTE
AM
OSC
FM
OSC
FM
MIX
DECODE
DIVIDE
VCO
19 18 17 16 15 14 13
3 4 5 6 7 8 9 10 11 12
AF
BUFFER
FM RF
AF
AMP
AM
IF FM IF
FM RF IN
RF GND
AM LOW CUT
MIX OUT
AGC
VCC
AM IF IN
FM IF IN
GND
TUN LED
ST LED
QUAD
AM RF IN FM RF OU
T
RF VCC FM OSC AM OSC AFC DET OUT MPX IN LPF2 LPF1 L-OUT R-OUT
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37
COM
RI
PRE NF1
PRE OUT2
PRE NF2
VREF
POWER OUTC
POWER OUT2
VCC
POWER MUTE
POWER IN1 POWER IN2
MIX OUT1
MIX OUT2
LP.2
R. P2
R.P1
DET OUT
MVREF
IN
+
VSP
LOW BOOST IN2
LOW BOOST IN1
LOW BOOST SW
M-GND
R.VREF
(FWD/REW)
PRE MUTE SW
POWER OUT1
POWER GND
MVCC DR WOUT MP-GND VOUT UOUT FC OUT OSC UB VB WB
PRE FWD IN2
PRE REV IN2
PRE REV IN1
PRE FWD IN1
S/S
PRE GND
PRE OUT1
BIAS
R.F
REF
SYS
CONT
DET
VREF
SPEED
LOW
BOOST
PRE DRIVER
OPERATION LOGIC
OSC
PLUSE DET
REF
VOLTAGE
REF VOLTAGE
FOR SPEED CONTROL
CURRENT
DET
OPERATION
DET
FWD/
REV
FREQ
CARC.
+
–
– 17 – – 18 –
• IC Block Diagrams
IC1 TA2111F
IC301 LB8115
SECTION 6
EXPLODED VIEWS
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
• Accessories and packing materials are
given in the last of this parts list.
• Abbreviation
CND : Canadian model
CEV : Poland, Czech, Greece and Turkey
model
CH : Chinese model
2AEP : Earphone (MDR-023) model
EE : East European model
FR : French model
C&SA : Central and South America model
9E : No indication of country of origin
E : Indication of country of origin
AEP : Headphone (MDR-E805LP) model
Ref. No. Part No. Description Remark
6-1. CABINET SECTION
N
N
Ref. No. Part No. Description Remark
1 X-3376-891-1 HOLDER (SUB) ASSY, CASSETTE
(FX271:US,CND,EE,E,C&SA,CH)
1 X-3376-893-1 HOLDER (SUB) ASSY, CASSETTE
(AEP,2AEP,FR,9E,CEV)
1 X-3377-162-1 HOLDER (SUB) ASSY, CASSETTE (FX275)
2 3-007-012-01 SPRING (TORSION)
3 3-007-011-01 SPRING (CASSETTE)
*4 3-030-057-01 HOLDER, LCD
5 3-007-006-21 BUTTON (STOP)
6 3-007-004-21 BUTTON (FF)
7 3-030-054-01 BUTTON (PLAY)
8 3-007-005-21 BUTTON (REW)
9 X-3376-890-1 CABINET (FRONT) SUB ASSY (FX271)
9 X-3377-161-1 CABINET (FRONT) SUB ASSY (FX275)
10 3-015-285-01 SCREW (M1.4), TOOTHED LOCK (WH)
11 3-030-058-01 BUTTON (PRESET)
12 3-007-010-01 TERMINAL (-), BATTERY
13 3-030-055-01 TERMINAL (+), BATTERY
14 X-3376-892-1 CENTER SUB ASSY, CABINET (US,CND,C&SA)
14 X-3376-894-1 CENTER SUB ASSY, CABINET
(EXCEPT US,CND,C&SA)
15 A-3021-177-A MAIN BOARD, COMPLETE (FX271:US,CND)
15 A-3021-178-A MAIN BOARD, COMPLETE (AEP,CEV,CH)
15 A-3021-179-A MAIN BOARD, COMPLETE (2AEP)
15 A-3021-180-A MAIN BOARD, COMPLETE (EE)
15 A-3021-181-A MAIN BOARD, COMPLETE (E,9E)
15 A-3021-183-A MAIN BOARD, COMPLETE (FR)
15 A-3021-184-A MAIN BOARD, COMPLETE (C&SA)
15 A-3021-215-A MAIN BOARD, COMPLETE (FX275)
16 3-007-762-01 STOPPER
17 3-030-056-01 RUBBER, CONDUCTIVE
L1 1-501-961-11 ANTENNA, FERRITE-ROD (AM)
LCD701 1-803-305-11 DISPLAY PANEL, LIQUID CRYSTAL

– 19 –
6-2.TAPE MECHANISM SECTION-1
(MF-WMFX171-114)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
54
53 55
56
52
51
M901
HP901
51 3-013-560-11 BELT
52 3-703-816-31 SCREW (M1.4), SPECIAL HEAD
53 3-921-042-01 GEAR (REEL)
54 3-703-816-73 SCREW (M1.4), SPECIAL HEAD
55 X-3369-749-7 PINCH LEVER (N) ASSY
56 3-920-996-01 SPRING (PINCH N)
HP901 1-500-532-11 HEAD, MAGNETIC (PLAYBACK)
M901 1-763-073-11 MOTOR (CAPSTAN/REEL) (including PULLEY)

– 20 –
6-3.TAPE MECHANISM SECTION-2
(MF-WMFX171-114)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
105
108
104
109
110
111
112
113
114
115
116
117
119
102
101
103
107
106
118
101 3-921-797-01 WASHER
102 3-921-003-01 BEARING
103 3-938-628-01 SPRING (PLAY-CP)
104 3-920-999-01 GEAR (A)
105 X-3375-837-1 CLUTCH ASSY
106 3-013-142-01 SPRING (FR-CP)
107 3-015-436-01 SPRING (STOP)
108 3-938-613-04 LEVER (OW), DETECTION
109 3-728-091-01 WASHER, STOPPER
110 3-923-530-01 SLEEVE (M)
111 3-921-335-03 WASHER, LEVER
112 3-920-990-01 SPRING (UD), COMPRESSION
113 3-921-050-01 GEAR (B)
114 X-3372-619-2 WHEEL ASSY (NP), CAPSTAN
115 3-921-043-01 GEAR (D)
116 3-014-709-01 SPRING (FR LEVER OW)
117 X-3375-054-3 CHASSIS ASSY (GL-02)
118 3-016-989-01 SPRING (SW-CP)
119 X-3376-931-1 CHASSIS (COMP) ASSY (GL-02-REC)

– 21 –
SECTION 7
ELECTRICAL PARTS LIST
NOTE:
• Due to standardization, replacements in
the parts list may be different from the
parts specified in the diagrams or the
components used on the set.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
• RESISTORS
All resistors are in ohms.
METAL:Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F:nonflammable
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
• SEMICONDUCTORS
In each case, u : µ, for example:
uA.. : µA.. uPA.. : µPA..
uPB.. : µPB.. uPC.. : µPC.. uPD.. : µPD..
• CAPACITORS
uF : µF
• COILS
uH : µH
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
When indicating parts by reference
number, please include the board.
• Abbreviation
CND : Canadian model
CEV : Poland, Czech, Greece and Turkey
model
CH : Chinese model
2AEP : Earphone (MDR-023) model
EE : East European model
FR : French model
C&SA : Central and South America model
9E : No indication of country of origin
E : Indication of country of origin
AEP : Headphone (MDR-E805LP) model
MAIN
A-3021-177-A MAIN BOARD, COMPLETE (FX271:US,CND)
A-3021-178-A MAIN BOARD, COMPLETE (AEP,CEV,CH)
A-3021-179-A MAIN BOARD, COMPLETE (2AEP)
A-3021-180-A MAIN BOARD, COMPLETE (EE)
A-3021-181-A MAIN BOARD, COMPLETE (E,9E)
A-3021-183-A MAIN BOARD, COMPLETE (FR)
A-3021-184-A MAIN BOARD, COMPLETE (C&SA)
A-3021-215-A MAIN BOARD, COMPLETE (FX275)
*********************
3-007-010-01 TERMINAL (-), BATTERY
3-030-055-01 TERMINAL (+), BATTERY
< CAPACITOR >
C2 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C3 1-162-995-11 CERAMIC CHIP 0.022uF 50V
C4 1-162-953-11 CERAMIC CHIP 100PF 5% 50V
C5 1-162-997-11 CERAMIC CHIP 10PF 0.5PF 50V
(EXCEPT EE)
C6 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C7 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C8 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C9 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C10 1-162-905-11 CERAMIC CHIP 1PF 0.25PF 50V (EE)
C10 1-164-118-11 CERAMIC CHIP 15PF 5% 50V
(EXCEPT EE)
C12 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C13 1-165-128-11 CERAMIC CHIP 0.22uF 16V
C14 1-162-908-11 CERAMIC CHIP 3PF 0.25PF 50V
C16 1-164-360-11 CERAMIC CHIP 0.1uF 16V
C17 1-115-156-11 CERAMIC CHIP 1uF 10V
C18 1-164-360-11 CERAMIC CHIP 0.1uF 16V
C19 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C20 1-162-974-11 CERAMIC CHIP 0.01uF 50V
C21 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C22 1-126-963-11 ELECT 4.7uF 20% 50V
C23 1-113-619-11 CERAMIC CHIP 0.47uF 10V
C24 1-113-619-11 CERAMIC CHIP 0.47uF 10V
C25 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
(EXCEPT US,CND,C&SA)
C25 1-164-245-11 CERAMIC CHIP 0.015uF 10% 25V
(US,CND,C&SA)
C26 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
(EXCEPT US,CND,C&SA)
C26 1-164-245-11 CERAMIC CHIP 0.015uF 10% 25V
(US,CND,C&SA)
C27 1-162-974-11 CERAMIC CHIP 0.01uF 50V
C28 1-124-434-00 ELECT 220uF 20% 4V
C29 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
(US,CND,C&SA)
C30 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
(EXCEPT US,CND,C&SA)
C31 1-162-966-11 CERAMIC CHIP 0.0022uF 10% 50V
C34 1-164-437-11 CERAMIC CHIP 18PF 5% 50V
C35 1-162-961-11 CERAMIC CHIP 330PF 10% 50V
C36 1-115-156-11 CERAMIC CHIP 1uF 10V
C40 1-162-966-11 CERAMIC CHIP 0.0022uF 10% 50V
C41 1-113-619-11 CERAMIC CHIP 0.47uF 10V
C42 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C101 1-162-962-11 CERAMIC CHIP 470PF 10% 50V
C103 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 50V
C104 1-126-153-11 ELECT 22uF 20% 6.3V
C105 1-115-156-11 CERAMIC CHIP 1uF 10V
C107 1-115-156-11 CERAMIC CHIP 1uF 10V
C108 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C109 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C201 1-162-962-11 CERAMIC CHIP 470PF 10% 50V
C203 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 50V
C204 1-126-153-11 ELECT 22uF 20% 6.3V
C205 1-115-156-11 CERAMIC CHIP 1uF 10V
C207 1-115-156-11 CERAMIC CHIP 1uF 10V
C208 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C209 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C301 1-126-246-11 ELECT CHIP 220uF 20% 4V
C302 1-117-579-11 DOUBLE LAYERS 0.1F 3.5V
C303 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C304 1-128-551-11 ELECT 22uF 20% 25V
C305 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C306 1-164-113-11 CERAMIC CHIP 20PF 5% 50V
C307 1-128-551-11 ELECT 22uF 20% 25V
C308 1-162-974-11 CERAMIC CHIP 0.01uF 50V
C309 1-115-156-11 CERAMIC CHIP 1uF 10V
C310 1-164-360-11 CERAMIC CHIP 0.1uF 16V
C311 1-162-966-11 CERAMIC CHIP 0.0022uF 10% 50V
(US,CND)
C319 1-107-823-11 CERAMIC CHIP 0.47uF 10% 16V
C321 1-124-434-00 ELECT 220uF 20% 4V
C324 1-115-156-11 CERAMIC CHIP 1uF 10V
C325 1-126-153-11 ELECT 22uF 20% 6.3V

– 22 –
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MAIN
C326 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C327 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C332 1-162-974-11 CERAMIC CHIP 0.01uF 50V
C333 1-126-162-11 ELECT 3.3uF 20% 50V
C334 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C335 1-163-077-00 CERAMIC CHIP 0.1uF 10% 25V
C336 1-164-360-11 CERAMIC CHIP 0.1uF 16V
C337 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C338 1-162-974-11 CERAMIC CHIP 0.01uF 50V
C601 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C602 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C603 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C604 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C605 1-135-149-21 TANTALUM CHIP 2.2uF 20% 10V
C606 1-107-823-11 CERAMIC CHIP 0.47uF 10% 16V
C608 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10V
C701 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C702 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 50V
C703 1-162-953-11 CERAMIC CHIP 100PF 5% 50V
C705 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C706 1-104-847-11 TANTAL. CHIP 22uF 20% 4V
C707 1-162-920-11 CERAMIC CHIP 27PF 5% 50V
C708 1-162-917-11 CERAMIC CHIP 15PF 5% 50V
C709 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C710 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C711 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C712 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C714 1-162-974-11 CERAMIC CHIP 0.01uF 50V
C715 1-164-360-11 CERAMIC CHIP 0.1uF 16V
< FILTER >
CF1 1-760-345-21 FILTER, CERAMIC
CF2 1-781-137-11 FILTER ASSY, CERAMIC
< CONNECTOR >
CN301 1-750-346-21 CONNECTOR, FFC/EPC (ZIF) 6P
< BPF >
CP1 1-236-711-21 FILTER, BAND PASS (EXCEPT EE)
CP1 1-239-813-21 FILTER, BAND PASS (EE)
< TRIMMER >
CT1 1-141-422-11 CAP, ADJ 10PF
< DIODE >
D1 8-719-049-75 DIODE KV1520TL00
D2 8-719-053-30 DIODE MA2S357-(TX).SO
D3 8-719-053-30 DIODE MA2S357-(TX).SO
D301 8-719-049-09 DIODE 1SS367-T3SONY
D302 8-719-801-78 DIODE 1SS184
D303 8-719-801-78 DIODE 1SS184
D701 8-719-400-20 DIODE MA152WA
< IC >
IC1 8-759-493-20 IC A2111F-(EL)
IC301 8-759-574-69 IC LB8115W-TLM
IC701 8-759-574-71 IC uPD17072GB-559-1A7
IC702 8-759-469-63 IC S-81215SGUP-DQK-T1
< JACK >
J301 1-565-287-11 JACK (2)
J302 1-750-061-11 JACK, DC (POLARITY UNIFIED TYPE)(DC IN 3V)
< JUMPER RESISTOR >
JR2 1-216-864-11 METAL CHIP 0 5% 1/16W
(US,CND,C&SA)
JR4 1-216-864-11 METAL CHIP 0 5% 1/16W
(EXCEPT US,CND,C&SA)
JR5 1-216-864-11 METAL CHIP 0 5% 1/16W
(EXCEPT US,CND,C&SA)
JR14 1-216-793-11 RES,CHIP 4.7 5% 1/16W
(US,CND)
JR14 1-216-864-11 METAL CHIP 0 5% 1/16W
(EXCEPT US,CND)
JR301 1-216-296-00 SHORT 0
JR701 1-216-864-11 METAL CHIP 0 5% 1/16W
(EE,E,9E)
JR702 1-216-864-11 METAL CHIP 0 5% 1/16W
(AEP,2AEP,FR,CEV,CH)
JR704 1-216-864-11 METAL CHIP 0 5% 1/16W
JR706 1-216-864-11 METAL CHIP 0 5% 1/16W
JR707 1-216-864-11 METAL CHIP 0 5% 1/16W
< COIL >
L2 1-416-528-11 COIL, AIR-CORE (EXCEPT EE)
L2 1-416-967-11 COIL, AIR-CORE (EE)
L3 1-416-449-11 COIL, AIR-CORE (EXCEPT EE)
L3 1-416-968-11 COIL, AIR-CORE (EE)
L4 1-416-423-11 COIL(WITH CORE) (AM OSC)
L101 1-414-760-21 INDUCTOR, FERRITE BEAD
L201 1-414-760-21 INDUCTOR, FERRITE BEAD
L301 1-414-235-22 INDUCTOR, FERRITE BEAD
L302 1-414-760-21 INDUCTOR, FERRITE BEAD
L304 1-414-760-21 INDUCTOR, FERRITE BEAD
L701 1-412-995-21 INDUCTOR 22uH
< TRANSISTOR >
Q2 8-729-102-27 TRANSISTOR 2SC2223-T1F12
Q101 8-729-424-67 TRANSISTOR UN2216
Q201 8-729-424-67 TRANSISTOR UN2216
Q301 8-729-216-22 TRANSISTOR 2SA1162-G
Q302 8-729-900-52 TRANSISTOR DTC114YK
Q303 8-729-402-13 TRANSISTOR XN1501
Q304 8-729-141-48 TRANSISTOR 2SB624-BV345
Q305 8-729-402-13 TRANSISTOR XN1501

– 23 –
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MAIN
Q306 8-729-403-17 TRANSISTOR XN1215
Q307 8-729-422-27 TRANSISTOR 2SD601A-Q
Q308 8-729-900-52 TRANSISTOR DTC114YK
Q701 8-729-422-27 TRANSISTOR 2SD601A-Q
Q702 8-729-422-27 TRANSISTOR 2SD601A-Q
Q703 8-729-102-27 TRANSISTOR 2SC2223-T1F12
Q704 8-729-011-47 TRANSISTOR XN4311
< RESISTOR >
R1 1-216-851-11 METAL CHIP 330K 5% 1/16W
R2 1-216-839-11 METAL CHIP 33K 5% 1/16W
R3 1-216-851-11 METAL CHIP 330K 5% 1/16W
R4 1-216-837-11 METAL CHIP 22K 5% 1/16W
R5 1-216-847-11 METAL CHIP 150K 5% 1/16W
R6 1-216-851-11 METAL CHIP 330K 5% 1/16W
R7 1-216-847-11 METAL CHIP 150K 5% 1/16W
R8 1-216-851-11 METAL CHIP 330K 5% 1/16W
R9 1-216-827-11 METAL CHIP 3.3K 5% 1/16W
R10 1-216-809-11 METAL CHIP 100 5% 1/16W
R11 1-216-833-11 RES,CHIP 10K 5% 1/16W
R12 1-216-797-11 METAL CHIP 10 5% 1/16W
R13 1-216-821-11 METAL CHIP 1K 5% 1/16W
R14 1-216-815-11 METAL CHIP 330 5% 1/16W
R15 1-216-841-11 METAL CHIP 47K 5% 1/16W
(EXCEPT FR)
R15 1-216-842-11 METAL CHIP 56K 5% 1/16W
(FR)
R16 1-216-841-11 METAL CHIP 47K 5% 1/16W
(EXCEPT FR)
R16 1-216-842-11 METAL CHIP 56K 5% 1/16W
(FR)
R17 1-216-797-11 METAL CHIP 10 5% 1/16W
R18 1-216-825-11 METAL CHIP 2.2K 5% 1/16W
(US,CND)
R18 1-216-835-11 METAL CHIP 15K 5% 1/16W
(EXCEPT US,CND)
R20 1-216-815-11 METAL CHIP 330 5% 1/16W
R21 1-216-864-11 METAL CHIP 0 5% 1/16W
R103 1-216-835-11 METAL CHIP 15K 5% 1/16W
R104 1-216-835-11 METAL CHIP 15K 5% 1/16W
R105 1-216-855-11 METAL CHIP 680K 5% 1/16W
R106 1-216-818-11 METAL CHIP 560 5% 1/16W
R107 1-216-795-11 RES,CHIP 6.8 5% 1/16W
(FX271:US,CND,2AEP)
R107 1-216-799-11 METAL CHIP 15 5% 1/16W
(FX271:EXCEPT US,CND,2AEP,FR/FX275)
R107 1-216-807-11 METAL CHIP 68 5% 1/16W
(FR)
R108 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R110 1-216-812-11 METAL CHIP 180 5% 1/16W
(EXCEPT US,CND,2AEP,FR)
R110 1-216-815-11 METAL CHIP 330 5% 1/16W
(US,CND,2AEP)
R110 1-216-816-11 METAL CHIP 390 5% 1/16W
(FR)
R111 1-216-821-11 METAL CHIP 1K 5% 1/16W
R112 1-216-821-11 METAL CHIP 1K 5% 1/16W
R203 1-216-835-11 METAL CHIP 15K 5% 1/16W
R204 1-216-835-11 METAL CHIP 15K 5% 1/16W
R205 1-216-855-11 METAL CHIP 680K 5% 1/16W
R206 1-216-818-11 METAL CHIP 560 5% 1/16W
R207 1-216-795-11 RES,CHIP 6.8 5% 1/16W
(FX271:US,CND,2AEP)
R207 1-216-799-11 METAL CHIP 15 5% 1/16W
(FX271:EXCEPT US,CND,2AEP,FR/FX275)
R207 1-216-807-11 METAL CHIP 68 5% 1/16W
(FR)
R208 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R210 1-216-812-11 METAL CHIP 180 5% 1/16W
(EXCEPT US,CND,2AEP,FR)
R210 1-216-815-11 METAL CHIP 330 5% 1/16W
(US,CND,2AEP)
R210 1-216-816-11 METAL CHIP 390 5% 1/16W
(FR)
R301 1-216-821-11 METAL CHIP 1K 5% 1/16W
R302 1-216-837-11 METAL CHIP 22K 5% 1/16W
R303 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R304 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
R305 1-216-833-11 RES,CHIP 10K 5% 1/16W
R306 1-216-847-11 METAL CHIP 150K 5% 1/16W
R307 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R308 1-216-819-11 METAL CHIP 680 5% 1/16W
R309 1-216-845-11 METAL CHIP 100K 5% 1/16W
R310 1-216-864-11 METAL CHIP 0 5% 1/16W
R311 1-216-821-11 METAL CHIP 1K 5% 1/16W
R312 1-216-835-11 METAL CHIP 15K 5% 1/16W
R313 1-216-821-11 METAL CHIP 1K 5% 1/16W
R319 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R320 1-216-218-00 RES,CHIP 6.8K 5% 1/8W
R321 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R324 1-216-833-11 RES,CHIP 10K 5% 1/16W
R326 1-216-845-11 METAL CHIP 100K 5% 1/16W
R327 1-216-134-00 METAL CHIP 2.2 5% 1/8W
R328 1-216-839-11 METAL CHIP 33K 5% 1/16W
R329 1-216-864-11 METAL CHIP 0 5% 1/16W
R408 1-216-845-11 METAL CHIP 100K 5% 1/16W
R601 1-216-821-11 METAL CHIP 1K 5% 1/16W
R605 1-216-835-11 METAL CHIP 15K 5% 1/16W
R606 1-216-845-11 METAL CHIP 100K 5% 1/16W
R608 1-216-833-11 RES,CHIP 10K 5% 1/16W
R609 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R610 1-216-821-11 METAL CHIP 1K 5% 1/16W
R611 1-216-864-11 METAL CHIP 0 5% 1/16W
R701 1-216-842-11 METAL CHIP 56K 5% 1/16W
R702 1-216-845-11 METAL CHIP 100K 5% 1/16W
R703 1-216-815-11 METAL CHIP 330 5% 1/16W
R704 1-216-803-11 METAL CHIP 33 5% 1/16W
R706 1-216-833-11 RES,CHIP 10K 5% 1/16W
R707 1-216-833-11 RES,CHIP 10K 5% 1/16W

– 24 –
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MAIN
R708 1-216-833-11 RES,CHIP 10K 5% 1/16W
R709 1-216-833-11 RES,CHIP 10K 5% 1/16W
R710 1-216-833-11 RES,CHIP 10K 5% 1/16W
R711 1-216-833-11 RES,CHIP 10K 5% 1/16W
R712 1-216-833-11 RES,CHIP 10K 5% 1/16W
R715 1-216-841-11 METAL CHIP 47K 5% 1/16W
R718 1-220-397-11 RES,CHIP 4.7M 5% 1/16W
R719 1-216-833-11 RES,CHIP 10K 5% 1/16W
R720 1-218-879-11 RES,CHIP 22K 0.50% 1/16W
R721 1-218-915-11 RES,CHIP 680K 0.50% 1/16W
R723 1-216-845-11 METAL CHIP 100K 5% 1/16W
R725 1-216-845-11 METAL CHIP 100K 5% 1/16W
< VARIABLE RESISTOR >
RV301 1-225-748-21 RES, VAR, CARBON 10K/10K (VOLUME)
RV601 1-241-784-11 RES, ADJ, CARBON 5K
< SWITCH >
S301 1-762-742-31 SWITCH, DETECTION (SMALL TYPE)
(TAPE POWER)
S303 1-692-298-11 SWITCH, SLIDE (NORM•CrO2/METAL,
DX•LOCAL) (US,CND,C&SA)
S303 1-692-298-11 SWITCH, SLIDE (NORM•CrO2/METAL,
ST•FM MONO) (EXCEPT US,CND,C&SA)
S305 1-692-298-11 SWITCH, SLIDE (AVLS)
S716 1-572-922-11 SWITCH, SLIDE (HOLD)
< TRANSFORMER >
T1 1-406-694-11 COIL, AM IFT
T301 1-426-917-11 TRANSFORMER, DC-DC CONVERTER
< THERMISTOR (POSITIVE) >
TH601 1-810-794-11 THERMISTOR, POSITIVE
< VIBRATOR >
X2 1-781-137-11 FILTER ASSY, CERAMIC
X701 1-577-262-11 VIBRATOR, CRYSTAL (75kHz)
*************************************************************
MISCELLANEOUS
***************
HP901 1-500-532-11 HEAD, MAGNETIC (PLAYBACK)
L1 1-501-961-11 ANTENNA, FERRITE-ROD (AM)
LCD701 1-803-305-11 DISPLAY PANEL, LIQUID CRYSTAL
M901 1-763-073-11 MOTOR (CAPSTAN/REEL) (including PULLEY)
*************************************************************
ACCESSORIES & PACKING MATERIALS
********************************
1-505-521-11 HEADPHONE (MDR-023)
(FX271:US,CND,2AEP,FR)
3-032-906-01 CASE, CARRYING
3-864-879-11 MANUAL, INSTRUCTION (ENGLISH,FRENCH,
ITALIAN) (US,CND,AEP,2AEP,FR)
3-864-879-21 MANUAL, INSTRUCTION (SPANISH,
PORTUGUESE) (AEP,2AEP,C&SA)
3-864-879-31 MANUAL, INSTRUCTION (GERMAN,DUTCH,
SWEDISH,FINNISH) (AEP,2AEP)
3-864-879-41 MANUAL,INSTRUCTION(ENGLISH,HUNGARIAN,
BULGARIAN,RUSSIAN) (EE,CEV)
3-864-879-51 MANUAL, INSTRUCTION (POLISH,CZECH,
GREEK,TURKISH) (CEV)
3-864-879-61 MANUAL, INSTRUCTION (ENGLISH,
TRADITIONAL CHINESE,
KOREAN,ARABIC) (E)
3-864-879-71 MANUAL, INSTRUCTION (ENGLISH,
TRADITIONAL CHINESE,
KOREAN,ARABIC) (9E)
3-864-879-91 MANUAL,INSTRUCTION(SIMPLIFIED CHINESE,
ENGLISH) (CH)
8-953-130-90 HEADPHONE MDR-E805LP/K SET
(EXCEPT US,CND,2AEP,FR)
8-953-741-90 HEADPHONE, STEREO MDR-A0101LP (FX275)
Sony Corporation
Personal A&V Products Company
9-926-958-11
WM-FX271/FX275
99B0482-1
Printed in Japan C1999. 2
Published by Quality Engineering Dept.
(Shinagawa)