索尼SONY WM-FS556电路图
WM-FS555/FS556
SERVICE MANUAL
SPECIFICATIONS
US Model
WM-FS555/FS556
Canadian Model
AEP Model
E Model
WM-FS555
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MF-WMFS555-114
9-873-595-02
2003A0200-1
© 2003.01
Sony Corporation
Personal Audio Company
Pubulished by Sony Engineering Corporation
RADIO CASSETTE PLAYER
Photo : WM-FS555
• Frequency
TV: 2-13 ch
WEATHER: 1-7ch
FM: 87.5-108 MHz
AM: 530-1710 kHz (North, Central and South America)
531-1602 kHz (Other counries)
• Power requirements
1.5 V DC battery size AA (R6) × 1
• Dimensions
Approx. 102.3 × 117.5 × 47.3 mm (4 1/8 × 4 3/4 × 1 7/8 inches)
including projecting parts and controls
• Mass
Approx. 219 g (7.8 oz) (main unit only)
• Supplied accessories
Stereo headphones or earphones (1)
Hand strap with belt clip (1)
Design and specifications are subject to change witout notice.
Ver 1.1 2003.01
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2
WM-FS555/FS556
Specifications ........................................................................... 1
1.
GENERAL ...................................................................... 2
2.
DISASSEMBLY
2-1. Chassis, H/P Board ..................................................... 3
2-2. Main Board ................................................................. 3
2-3. Mechanism Deck ........................................................ 4
2-4. Belt, Capstan/reel Motor (M601),
Magnetic Head (Playback) (HP601) ........................... 4
3.
ADJUSTMENTS
3-1. Mechanical Adjustments ............................................ 5
3-2. Electrical Adjustments ................................................ 5
4.
DIAGRAMS
4-1. Explanation of IC Terminals....................................... 8
4-2. Block Diagrams .......................................................... 9
4-3. Printed Wiring Boards – Main Section – .................. 10
4-4. Schematic Diagram – Main Section (1/2)– ...............11
4-5. Schematic Diagram – Main Section (2/2)– .............. 12
4-6. IC Block Diagrams ................................................... 13
5.
EXPLODED VIEWS
5-1. Cassette Lid Section ................................................. 15
5-2. Cabinet Section ......................................................... 16
5-3. Mechanism Deck Section
(MF-WMFS555-114) ............................ 17
6.
ELECTRICAL PARTS LIST ................................... 18
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.
TABLE OF CONTENTS
SECTION 1
GENERAL
TV/WEATHER (US), FM (EXCEPT US)
HOLD
VOLUME*
TUNING+/–
x
Y
PRESET +/–
FM/AM (US), AM (EXCEPT US)
RADIO OFF
M
n**
m
MENU
SET
ENTER
Rubber cap
Air outlet
i
* There is a tactile dot beside VOLUME on the main unit to
show the direction to turn up the volume.
** The button has a tactile dot.
This section is extracted from
instruction manual.
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3
WM-FS555/FS556
2 Two screws
(B1.7 × 8)
1 Open the “lid, Cassette”
H/P board
5
3 Claws
Cabinet (rear) sub ASSY
Chassis
4
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CHASSIS, H/P BOARD
2-2. MAIN BOARD
z The equipment can be removed using the following procedure.
Main board
Chassis, H/P board
Mechanism deck
Belt, Capstan/reel motor (M601),
Magnetic head (playback) (HP901)
Set
1 Remove solder
(four places)
3 Screw
(WH M1.4)
2 Remove solder
(six places)
4 Claws
5
Main board
Head flexible board
Chassis
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4
WM-FS555/FS556
2-3. MECHANISM DECK
2-4. BELT, CAPSTAN/REEL MOTOR (M601), MAGNETIC HEAD (PLAYBACK) (HP901)
1 Claws
Mechanism deck
Chassis
2
wheel ASSY (P), capstan
wheel ASSY (P), capstan
Belt
• How to apply the belt
Capstan/reel motor
(M601)
1 Belt
5 magnetic head
(PLAYBACK)
(HP901)
3 Capstan/reel motor
(M601)
2 Two screws (M1.4)
4 Two screws (M1.4)
Mechanism deck
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WM-FS555/FS556
3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
•
Supplied voltage : 1.5 V.
•
Switch and control position (MENU display)
MEGA BASS : OFF
VOLUME control (RV301) : maximum
AVLS : OFF (No indicated)
FM MODE : US : DX (No indicated)
Canadian, AEP, E : STEREO (No indicated)
TAPE SECTION
Test Tape
Type
Signal
Used for
WS-48A
3kHz, 0dB
Tape Speed Adjustment
Tape Speed Adjustment
Procedure :
1. Playback WS-48A (tape center part) in the FWD state and ad-
just RV601 so that the frequency counter reading becomes
3,000Hz.
Standard value : 2,985–3,015Hz
2. Playback WS-48A (tape center part) in the REV state.
Check that frequency counter reading is within ±1.0% of the
reading of step 1.
Adjustment Location :
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head
pinch roller
capstan
rubber belt
2. Demagnetize the playback head with a head demagnetizer.
Do not use a magnetized screwdriver for the adjustments.
3. These measurement and adjustment should be performed with
the rated power supply voltage (1.5 V) unless otherwise noted.
Torque Measurement
Mode
Torque meter
Meter reading
FWD
1.97 – 4.11 mN • m
20 – 42 g • cm
(0.28 – 0.58 oz• inch)
FWD
CQ-102C
less than 0.19 mN • m
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
1.97 – 4.11 mN • m
REV
20 – 42 g • cm
(0.28 – 0.58 oz• inch)
REV
CQ-102RC
less than 0.19 mN • m
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
FF, REW
CQ-201B
more than 3.93 mN • m
more than 40 g • cm
(more than 0.56 oz• inch)
SECTION 3
ADJUSTMENTS
0 dB = 0.775V
set
test tape
WS-48A
(3kHz, 0dB)
frequency counter
16 Ω
phones jack (J301)
RV601: Tape speed Adjustment
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WM-FS555/FS556
C9
L2
L7
L4
AM
FERRITE–ROD
ANTENNA
L5
C30
R10
C26
R9
R8
C22
4
D2
R13
Q302
C29
R7
TP
(VT)
C31
C24
R213
C21
R6
C13
C331
C14
C19
L3
R113
C28
R5
D1
OFF
Q305
C23
C35
C107
C207
R716
C20
JC1
C15
Q703
D3
R20
R21
TP304
R2
R3
C11
C12
R107
R108
R105
R205
R208
R207
TAP102
TAP103
TAP104
11
(11)
1-682-795-
MAIN BOARD (SIDE B)
TP (VT)
digital voltmeter
(DC range)
TUNER SECTION
AM Section
BAND : AM
FM Section
BAND : FM
US model only
TV/WEATHER Section
BAND: TV/WEATHER
Adjustment Location : Main board (See page 7)
0 dB = 1µV
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
16 Ω
phones jack (J301)
level meter
Frequency Coverage Adjustment
Setting :
C9
L2
L7
C
L4
AM
FERRITE–ROD
ANTENNA
R10
C26
R8
C22
C34
D2
R5
D1
D4
Q305
C23
C35
C107
C207
C2
C15
FB301
C1
C37
JC4
FB1
TP304
TAP103
TAP105
TAP106
1-68
US
FM RF signal
generator
33.75kHz frequency
deviation by 1kHz signal.
Output level :
as low as possible
TP
(RF)
0.01µF
MAIN BOARD (SIDE B)
TP(RF)
•
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
no mark : 10kHz step
< > : 9kHz step
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts
Frequency display
Reading on digtal
voltmeter
L5
530kHz
1.1 ± 0.15 V
<531kHz>
Confirmation
1,710kHz
8.6 ± 0.4 V
<1,602kHz>
9.5 ± 0.4 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
620kHz <621kHz>
CT1
1,400kHz <1,395kHz>
FM FREQUENCY COVERAGE CONFIRMATION
Frequency display
Reading on digtal voltmeter
Confirmation
87.5MHz
Standard value : 6.5V or less
Confirmation
108MHz
8.9 ± 0.4V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
87.5MHz (US), 98MHz (EXCEPT US)
Confirmation
108MHz
US model only
TV TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7
TV 7CH
TV FREQUENCY COVERAGE CONFIRMATION
Frequency display
Reading on digtal voltmeter
Confirmation
TV 2CH
1.1 ± 0.15V
Confirmation
TV 13CH
8.0 ± 0.4V
Confirmation
WEATHER 1CH
3.65 ± 0.3V
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WM-FS555/FS556
Adjustment Location :
L5 : AM Frequency
Coverage Adjustment
CT1 : AM Tracking Adjustment
L4: AM Tracking Adjustment
L2 : FM Tracking Adjustment
L7 : TV Tracking Adjustment
[MAIN BOARD]
(SIDE A)
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WM-FS555/FS556
Pin No.
Pin name
I/O
Description
SECTION 4
DIAGRAMS
4-1. EXPLANATION OF IC TERMINALS
IC701 TC9329FA-CFX1740 (SYSTEM CONTROL)
1 – 4
COMI-4
O
LCD common drive.
5 – 19
S1-15
O
LCD segment drive.
20 – 22
K01-03
O
Key output.
23 – 26
K1-4
I
Key input.
27
VDD
–
Power supply terminal.
28
BEEP
O
Beep signal output.
29
FWD/REV CTL
O
FWD/REV head selection output.
30
BAND1
O
Band selection output.
31
BAND2
O
Band selection output..
32
AMP CTL
O
Amplifier B+ switch ON/OFF control.
33
NC
–
Not used (OPEN).
34
BATT CHECK
O
Battery voltage check terminal.
35
IF IN 1
I
IF input terminal.
36
HOLD SW
I
Hold switch input.
37
GND
–
Ground terminal.
38
OSC IN
I
OSC input from tuner.
39
VDD
–
Power supply terminal.
40
DO (OT)
O
Tuner B+ switch ON/OFF contorol.
41
VREG
–
Capacitor connection terminal.
42
IF REQ
O
IF request output for tuner.
43
TAPE
I
Tape power switch input.
44
RADIO ON
O
Tuner ON/OFF output.
45
LOCAL/DX,
O
Tuner sensitivity/tape type selection output.
NORM/MET
46
FWD/REV SW
I
FWD/REV switch input.
47
P-CTL
O
Power switch ON/OFF output
48
MODEL1
I
Distination select terminal.
49
MODEL2
I
Distination select terminal.
50
PRE CTL
O
PRE mute output.
51
MUTE CTL
O
PRE mute signal output.
52
MB CTL
O
Megabass control signal output.
53
AVLS CTL
O
AVSL control signal output.
54
RESET
I
Reset signal input.
55
X-OUT
O
System clock output (75kHz).
56
X-IN
I
System clock input (75kHz).
57
GND
–
Ground terminal.
58
VDB
–
Capacitor conection terminal.
59
C1
–
Capacitor conection terminal.
60
C2
–
Capacitor conection terminal.
61
VEE
–
Capacitor conection terminal.
62
C3
–
Capacitor conection terminal.
63
C4
–
Capacitor conection terminal.
64
VLCD
–
Capacitor conection terminal.
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WM-FS555/FS556
4-2. BLOCK DIAGRAMS
29
32
56
55
28
52
53
29
51
50
44
30
31
45
42
35
38
40
54
47
36
19 - 5
1 - 4
25
26
23
24
22
20
21
43
34
46
M601
CAPSTAN/
REEL
MOTOR
VCC
U
AMP CTL
X-IN X-OUT
BEEP
MB CTL
AVLS CTL
FWD/REV CTL
MUTE CTL
PRE CTL
S1-15
KO1
KO2
KO3
K1
K2
K3
K4
FWD/REV
SW
TAPE
BATT CHECK
COM1-4
RADIOON
BAND1
BAND2
LOCAL/DX
NORM/MET
IF-REQ
IF IN1
OSC IN
DO(OT)
V
W
U
+VCC
VCC
MPX IN
R-CH
FM IF IN
QUAD
AM IF IN
Q707
Q703
CF1
VREF
START
IN+
VCC
RF VCC
FM-MIX
DET
OUT
V
W
19
1
3
8
7
16
24
25
28
27
RESET
IC703
SYSTEM
CONTROL
IC701
TV/FM/AM RF AMP
FRONTEND
MPX
IC1
POWER AMP
IC301 (2/2)
PRE AMP
IC301 (1/2)
5
4 OUT VCC
1
2
30
29
TV
RF AMP
LOGIC
CIRCUITRY
FEEDBACK
DRIVE
OSC
FM
RF AMP
FM/TV
OSC
FM/TV
MIX
FM
DET
IF
BUFFER
SW
FM
MPX
19
18
20
16
AGC
BST
SW
MUTE
SW
AVSL
Q305
8
9
4
3
5
RF & REF
REG
Q302
25
26
26
4
7
8
11
12
13
21
22
16
15
14
20
19
1
AM
MIX
DC-DC
CONVERTER
Q401
PLL LOW PASS
FILTER
Q701.702
LCD701
LIQUID
CRYSTAL
DISPLAY
KEY
MATRIX
S702-711
AM
OSC
BUFFER
AM
DET
5
10
7
12
13
R-CH
VREF
Q306
+VH
R-CH
PW INA
PW NFA
+VCC
BST SW
PW MUTE
PREMUTE
OUTA
OUTC
AGC
IN
R-CH
Q303
D5
J301
HEADPHONE
S302
(FWD/REV)
S301
POWER
R-CH
Q704
INA
PRE AMP
PRE OUTA
PRE NFA
VREF
Q201
Q101
Q202
Q102
VREF
Q301
+VCC
L
R
REV
R
FWD
L
10
L7
TV
TRACKING
L7
(TV-RF)
L2
FM
TRACKING
L4,CT1
AM
TRACKING
L4
AM FERRITE-ROD
ANNTENNA
L2
(FM-RF)
L3
(FM-OSC)
L5
AM
FREQUENCY
COVERAGE
L5
(AM-OSC)
RV601
TAPE SPEED
CAPSTAN/REEL MOTOR DRIVER
IC601
1/8 OR
1/16
1/2
+VH
AM OSC
VT
AMB/P
AMRF IN
FM/TV OSC
FMRF OUT
FMRF IN
TVRF OUT
TVRF IN
T401
(TV)
D4
D2
D3
D1-1
D1-2
CT1
(FM)
RV301
VOLUME
X701
75kHz
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION LR6)
1PC, 1.5V
RESET
P-CTL
Q705
D701
+VCC
MODE1
MODE2
L-OUT
R-OUT
LPF1
IF REQ
IF COUNT
OSC OUT
HP901
PLAY BACK
HEAD
AM-
MIX
X1
(FM-DISC)
CF-3
AF
JC2
S701
HOLD .
OFF
ON
EXCEPT US MODEL
EXCEPT US
MODEL
US MODEL
US MODEL
+
+
(LOCAL/DX)
(NORMAL/METAL)
w
: FM
: AM
: TAPE PLAY
• SIGNAL PATH
• R-ch is omitted due to same as L-ch.
w w w
.
x i a o y u 1 6 3 .
c o m
Q Q
3 7 6 3 1 5 1 5 0
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T E L
1 3 9 4 2 2 9 6 5 1 3
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10
WM-FS555/FS556
11
(11)
1-682-795-
(SIDE A)
MAIN BOARD
J301
i
C721
C405
T401
C503
C311
C304
C9
L2
L7
X1
CF1
C6
C2
RV601
L4
AM
FERRITE–ROD
ANTENNA
RV301
L5
C402
C308
CT1
R403
R104
C602
R609
R11
US,CND
AEP,E
R16
C16
C8
R4
C17
C605
C309
R402
R1
C404
C310
C3
JC2
IC301
R401
R708
C601
C109
L1
IC601
R201
C209
C5
R611
C711
C407
R601
C610
R610
R109
C104
C608
C4
D401
C603
D402
C406
D5
C307
C10
R211
R603
C604
R602
C606
C32
Q401
R704
R209
C204
R705
IC1
S301
(POWER)
R404
C316
R717
D701
R709
C323
Q306
C715
R718
C607
R506
R101
C103
R330
R331
C101
R111
C312
Q705
C330
C403
R310
R204
R306
R305
R12
FB101
FB201
C41
R202
R222
C203
R203
R221
R103
R102
R121
R122
R106
R206
C7
L401
R332
TAP101
JC6
C409
R405
R406
C44
C201
L6
1
11
15
20
5
10
1
10
15
16
20
21
30
5
1
10
15
16
20
21
30
5
BLK
RED
WHT
R702
S706
ENTER
R210
R733
1
3
5
4
Q301
C30
S708
TUNING+
S707
SET
C709
R720
C706
S711
MENU
R10
C26
R9
R8
R214
R114
R301
C22
C34
D2
R13
Q302
C29
S702
FM/AM
R7
Q701
C31
C110
C306
S710
PRESET+
Q702
C24
R213
C21
R6
R711
C704
C13
R710
C708
C331
X701
C14
C106
S705
TUNING–
C705
S703
PRESET–
C19
C305
C713
R706
L3
R113
C703
R302
C28
L701
C702
R5
D1
C714
C707
S704
RADIO
OFF
D4
Q305
Q303
C710
C23
R604
R703
R714 CND
R303
C206
C35
C107
R715
1
5
10
16
17 20
25
30 32
49
55
60
64
33
35
40
45
48
C207
R716
R110
S709
TV/WEATHER
C20
IC701
LCD701
JC1
C210
S302
(FWD/REV)
R605
C15
TH601
WHT
ORG
BLK
RED
S701
Q703
CN101
D3
R732
Q704
R707
R719
C732
C731
R731
IC703
JC701
JC703
JC704
JC702
C701
C301
C325
Q202
Q102
Q101
Q201
R311
FB301
C1
R17
C36
C37
C324
BLK
RED
WHT
R20
R21
C712
JC4
TAP1
TP304
R333
R2
R3
C11
C12
R107
R108
R105
R205
R208
R207
TAP102
TAP103
TAP104
TAP105
TAP106
TAP107
R18
CF3
C322
C108
C208
R701
Q707
H/P BOARD
11
(11)
1-682-796-
11
(11)
1-682-795-
N
VOLUME
(SIDE B)
MAIN BOARD
M601
CAPSTAN/REEL
MOTOR
M
HOLD .
ON
OFF
t
1
2
3
4
5
6
1
2
3
4
5
6
L-CH
FWD
R-CH
HP901
PLAYBACK
HEAD
L-CH
REV
R-CH
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION LR6)
1PC, 1.5V
US
AEP,E
US,AEP,E
AEP,E
US,CND
2
3
4
5
6
7
8
9
10
A
1
B
C
D
E
F
G
4-3. PRINTED WIRING BOARDS – MAIN SECTION –
Note:
• X : parts extracted from the component side.
•
a
: Through hole.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
Ref. No.
Location
z Semiconductor
Location
D1
D2
D3
D4
D5
D401
D402
D701
IC1
IC301
IC601
IC701
IC703
Q101
Q102
Q201
Q202
Q301
Q302
Q303
Q305
Q306
Q401
Q701
Q702
Q703
Q704
Q705
Q707
F-9
F-8
F-8
F-8
G-3
C-5
C-5
B-4
F-3
D-2
B-3
D-7
C-7
C-9
D-9
C-9
D-9
D-9
E-9
E-9
F-9
D-2
B-4
D-8
D-8
E-9
E-7
B-4
C-8
w w w
.
x i a o y u 1 6 3 .
c o m
Q Q
3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
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11
11
WM-FS555/FS556
4-4. SCHEMATIC DIAGRAM − MAIN SECTION (1/2) −
R731
C732
R733
C731
R720
C711
R506
R710
R709
R708
R706
L701
22µH
R704
R705
R707
R718
R715
Q705
D701
C503
R717
IC701
C701
Q703
R716
C712
R703
Q702
R18
C706
C713
R714
C714
C36
R17
R711
R702
C407
R402
R401
L401
10µH
T401
C404
C405
R403
R405
D402
C403
C402
D401
C409
R406
R404
C406
S703
S702
S706
S707
Q707
R701
TAP1
C1
C3
C6
C9
CF3
C7
C2
X1
C15
CF1
C5
C44
R2
C13
JC6
C32
L6
L1
0.1µH
0.1µH
C10
C4
R4
C17
R6
D3
C28
C21
L3
R13
C29
C20
C26
L2
CT1
C22
C31
C19
C24
R9
R8
D1
R7
C30
C23
C16
R10
D4
C34
JC702
JC703
JC704
JC701
D5
C41
JC1
JC2
C8
R1
S701
S704
S705
S302
S301
C35
L7
JC4
D2
R5
L5
Q701
Q401
Q704
R719
C12
C11
R3
C14
C702
C707
C710
C708
C709
C703
C704
R11
C37
R21
R20
C705
C721
IC703
R16
R12
R732
S708
S709
S710
S711
X701
C715
IC1
10k
1
1M
1
100k
22
4V
100k
10k
10k
10k
10k
10k
10k
10k
100k
1k
2SB815B7
1SS367
220
4V
4.7k
TC9329FA
0.47
2SB815B7
2.2k
1
100k
2SC4154
0
1
0.01
10k
0.01
0.01
10k
10k
4.7k
0.022
22
47k
D-D CON
0.01
22
6.3V
1k
1k
MA111
2.2
1000p
MA8120
0.22
1k
47k
10p
PRESET-
FM/AM
ENTER
SET
2SB815B7
1k
100p
100p
22
6.3V
220
4V
AM USE)
470p
4.7
16V
FM-DISC
0.022
(FM USE)
0.047
0.022
10k
0
5p
5p
0.1
4.7k
0.01
10k
MA2S357
220p
2200p
27nH
FM-OSC
1k
22
2200p
2200p
FM-RF
10p
4p
0.022
0.022
0.022
470k
470k
SVC347
10k
470p
0.022
0.01
100k
MA2S357
2200p
0
0
0
0
MA2SP0100L
1000p
:1B
0
0
0.47
1k
TUNING-
(FWD/REV)
(POWER)
2200p
0
MA2S357
100k
AM-OSC
2SC4154
2SC4154
2SB815B7
47k
10k
0.1
0.1
0.47
0.1
0.1
10p
22p
1k
1000p
22k
22k
10
6.3V
0.056
PST9008NL
RESET
0
1k
100k
TUNING+
TV/WEATHER
PRESET+
MENU
75kHz
1
TA2154FN(EL)
TU L
TU R
AVLS
PRE MUTE
PWR MUTE
FR
MEGA BASS
NOR/METAL
FM RF
BUZZER
FWD/REV CTL
VCC
B+
MOTOR START
GND
TU VCC
*
*
*
*
RFGND
FM-MIX
AM-MIX
AGC
Vcc
FM-IFin
GND
AMIFin
QUAD
DETout
MPXin
LPF1
R-OUT
L-OUT
LPF2A
LPF2B
IFcount
REQSW
MODE-1
MODE-2
OSCout
FM/TVOSC
AMOSC
RFVcc
AMRFin
AMB/P
FMRFout
FMRFin
TVRFin
TVRFout
COM1
COM2
COM3
COM4
S1
VLCD
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
IFin1
GND
OSCin
VDD
DO(OT)
Vreg
RESET
X-OUT
X-IN
GND
VDB
C1
C2
VEE
C3
C4
KO1
KO2
KO3
K1
BEEP
AMP CTL
NC
HOLD SW
RADIO ON
TAPE
IF-REQ
BAND2
BAND1
VDD
K3
K2
MODEL1
MODEL2
PRE CTL
MUTE CTL
MB CTL
AVLS CTL
L.P.F
K4
P-CTL
BATT CHECK
LOCAL/DX,NORM/MET
FWD/REV SW
FWD/REV CTL
MOTOR START
FILTER
LOW PASS
PLL
Q701,702
TV/FM/AM RF AMP
FRONT-END
MPX
DRY BATTERY
SIZE"AA"
(IEC DESIGNATION LR6)
US
AEP,E
AEP,E
US,CND
CND
US,AEP,E
US,CND
AEP,E
US,CND
*C11,12
0.01
4700P
AEP,E
US,CND
AEP,E
*C13,14
0.047
0.1
AM
FERRITE-ROD
ANTENNA
L4
HOLD
ON
OFF
OFF
RADIO
1PC,1.5V
TRACKING
L7
TV
FM
TRACKING
L2
FREQUENCY
COVERAGE
FM
L3
AM
FREQUENCY
COVERAGE
TRACKING
AM
L4,CT1
DC-DC
CONVERTER
SWITCH
SWITCH
SWITCH
SYSTEM
CONTROL
LIQUID CRYSTAL DISPLAY
LCD701
z Refer to page 13 for Notes. z Refer to page 13 for Waveforms. z Refer to page 13 for IC Block Diagrams.
w w w
.
x i a o y u 1 6 3 .
c o m
Q Q
3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
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12
12
WM-FS555/FS556
R205
R105
R206
C204
R204
C203
R222
R221
R201
R203
R202
R103
R106
R104
C103
R121
R101
R122
R102
R108
R107
R208
R207
Q101
Q201
Q202
Q102
R301
R302
R303
Q301
R111
C101
C201
R211
C325
C305
C306
C307
C308
Q302
R109
C109
C310
R310
R209
C209
C301
C312
C304
R113
R213
C331
FB201
FB101
FB301
R332
R331
R330
C311
C330
C106
C206
C208
C108
C316
R311
R333
R110
C110
C210
R210
C322
C324
Q303
C323
IC601
C603
C601
C604
C606
C602
C608
C605
C607
C610
R602
R601
R605
R604
R610
R611
R609
R603
C309
R306
R305
IC301
RV601
Q305
RV301
C207
C107
CN101
Q306
J301
C104
TH601
470
470
100k
22
4V
470
4700p
47k
22k
22k
470k
47k
470k
100k
470
4700p
22k
22k
47k
47k
10k
22k
10k
22k
2A1362-Y
2A1362-Y
2SA1362-Y
2SA1362-Y
100k
100k
100k
2SC2712
100k
470p
470p
100k
2.2
6.3V
0.22
4.7
4V
1
0.22
2SA1362-Y
4.7
0.22
0.22
4.7
4.7
0.22
22
4V
2.2
6.3V
10
6.3V
4.7k
4.7k
R114
100
0
R114, 214
AEP
EXCEPT AEP
R214
*
*
*
0.047
100k
1k
1k
4.7
16V
1
1
1
1000p
1000p
1
100k
22
1k
0.022
0.022
1k
1000p
22
4V
XN1501
1
MM1279XVBE
CAPSTAN/REEL
MOTOR DRIVER
0.22
1
0.1
0.01
0.1
0.01
0.1
0.01
1
100
22k
4.7k
1k
220k
220k
220k
10k
0.1
1M
470k
TA2160FN
2.2k
RN2511
AVLS
30k/30k
1
1
6P
XP4115
22
4V
PWR MUTE
PRE MUTE
AVLS
TU R
TU L
FR
NOR/METAL
MEGA BASS
FM RF
BUZZER
FWD/REV CTL
B+
VCC
GND
MOTOR START
TU VCC
INB
INA
RF IN
VREF IN
RF OUT
BASE
LPF
BSF NF
BST OUT
PW INC
AGC IN
OUTA
OUTC
OUTB
VCC
PW GND
AGC DET
PRE MUTE
PW MUTE
PW INB
PW NFB
PW NFA
PW INA
BST SW
PRE GND
VREF
PRE OUTA
PRE NFA
PRE NFB
PRE OUTB
L
R
R
FWD(L)
FWD(R)
FWD
REV(L)
REV(R)
REV
REF
GND
L
W
V
U
VCC
1
6
POWER AMP
PRE AMP,
TAPE SPEED
MOTOR
CAPSTAN/REEL
M601
REG
SWITCH
SWITCH
SWITCH
SWITCH
SWITCH
SWITCH
SWITCH
HEAD
HP901
PLAYBACK
VOLUME
z Refer to page 13 for Notes. z Refer to page 14 for IC Block Diagrams.
4-5. SCHEMATIC DIAGRAM − MAIN SECTION (2/2) −
w w w
.
x i a o y u 1 6 3 .
c o m
Q Q
3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
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13
WM-FS555/FS556
Note on Schematic Diagram: MAIN SECTION
• 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 1/4 W or less unless otherwise
specified.
•
f
: internal component.
• C : panel designation.
•
: B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• no mark : FM
(
) : AM
(( ))
: TV
<
> : PLAY(TAPE)
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: FM
f
: AM
E
: PB
• Abbreviation
CND
: Canadian
z Waveforms
1
IC701 tg
XOUT
VOLT/DIV : 0.5V AC
TIME/DIV : 10 µsec
2
Q401 C
VOLT/DIV : 0.5V AC
TIME/DIV : 0.2 µsec
1.1 Vp-p
2.65 MHz
0.38 µsec
1.3 Vp-p
75.0 kHz
4-6. IC BLOCK DIAGRAMS
12
13
14
19
15
FM/TV
MIX
8
9
10
TV RF IN
VCC
FM IF IN
AM IF IN
QUAD
DET OUT
MPX IN
LPF IN
R OUT
GND
1
4
2
3
5
6
FM FR IN
RF GND
FM MIX
AM MIX
AGC
7
AM
MIX
SW
FM/AM/TV
PW SW
1/2
FM
OSC
TV
OSC
1/8 OR
1/16
AM
DET
LEVEL
DET
FM MPX
FM
DET
AM
OSC
AGC
18
17
16
20
TV FM OSC
AM RF IN
OSC OUT
TV RF OUT
FM RF OUT
AM BYPASS
AM OSC
MODE2
MODE1
IF REQ
IF COUNT
LPF2B
LPF2A
L OUT
RFVCC
30
29
27
28
23
24
25
26
22
21
11
BUFF
IF BUFF
BUFF
BUFF
FM IF
AM IF
AF
TV RF
FM RF
IC1 TA2154FN (EL)
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9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
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14
WM-FS555/FS556
12
13
14
19
15
8
9
10
PRE OUT B
BST SW
PW INA
PW NFB
PW INB
PW MUTE
PRE MUTE
AGC DET
PW GND
PW NFA
1
4
2
3
5
6
PRE NFB
PRE NFA
PRE OUT A
VREF
PRE GND
7
RF & REF
BST SW
AGC DET
AGC
18
17
16
20
LPF
VREF IN
BSF NF
IN B
IN A
RF IN
BASE
BST OUT
PW INC
AGC IN
OUT A
OUT C
OUT B
VCC
RF OUT
30
29
27
28
23
24
25
26
22
21
11
PRE B
PRE A
BST
PW A
PW B
PW C
IC301 TA2160FN (EL)
+
11
13
14
15
16
17
18
20
1
2
3
4
5
6
7
8
9
10
19
12
PRE
DRIVER
SOFT
SWITCH
MOTIVE
LOGIC
MOTIVE
/OSC
BIAS
REFERENCE
VOLTAGE
MOTIVE
CONTROL
CIRCUIT
INVERTER
SPEED
CONTROL
CURRENT
CONTROL
OUTPUT
BIAS
PV
V
PW
W
GND
OSC
DR
VREF
START
VSP
IN+
U
PU
GND
VCC
FC
TC1
TC2
R1
OUT
IC601 MM1279XVBE
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9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
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WM-FS555/FS556
15
SECTION 5
EXPLODED VIEWS
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
• Hardware (# mark) list and accessories and packing
materials are given in the last of this parts list.
• Abbreviation
CND
:Canadian
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
5-1. CASSETTE LID SECTION
1
3-224-946-01 SHAFT (BUCKLE)
2
3-235-969-01 BUCKLE
3
3-235-980-01 PACKING (CABINET)
4
3-318-203-62 SCREW (B1.7X4), TAPPING
5
X-3369-989-4 ARM ASSY
6
3-386-373-01 SCREW, TAPPING
7
3-235-966-01 LID (CASSETTE)
8
3-235-984-01 SHEET (CASSETTE), ADHESIVE
9
3-235-976-01 RUBBER
10
3-224-941-11 PACKING (MD.RVS)
11
3-224-951-01 SHEET (MD), ADHESIVE
12
4-225-316-13 ROLLER
13
3-224-945-11 SHAFT (ROLLER)
14
3-235-981-01 BRACKET
15
3-895-823-41 SCREW (B1.4X4), TAPPING
16
7-624-101-04 STOP RING 1.2 (E TYPE)
9
8
6
7
3
4
1
5
6
10
11
12
2
1
12
13
14
15
16
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9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
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16
WM-FS555/FS556
5-2. CABINET SECTION
68
67
66
65
64
63
62
61
60
58
59
56
55
54
53
52
51
57
73
74
78
79
75
77
76
83
78
82
81
80
72
71
70
69
L4
MF-WMFS555-114
LCD701
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
3-386-371-21 PACKING, HP JACK
52
3-221-321-11 KNOB (VOL)
53
3-012-927-01 RING, O
54
X-3381-679-1 CABINET (REAR) SUB ASSY (FS555:US,
FS556)
54
X-3381-683-1 CABINET (REAR) SUB ASSY (FS555:CND,E)
54
X-3381-684-1 CABINET (REAR) SUB ASSY (FS555:AEP)
55
3-235-975-01 KNOB (HOLD)
56
3-018-075-01 SPACER
57
3-235-982-01 TERMINAL (-), BATTERY
58
3-221-309-01 LEVER (VOL) (A)
59
4-223-413-01 SCREW (M1.4X3)
* 60
3-039-660-01 HOLDER (LCD)
61
3-040-176-01 RUBBER, CONDUCTIVE
* 62
A-3021-752-A MAIN BOARD, COMPLETE (US)
* 62
A-3021-754-A MAIN BOARD, COMPLETE (CND)
* 62
A-3021-755-A MAIN BOARD, COMPLETE (AEP)
* 62
A-3178-859-A MAIN BOARD, COMPLETE (E)
63
3-921-955-01 SCREW (M1.4), TOOTH (WH)
64
3-227-298-01 BUTTON (STOP)
65
3-227-299-01 BUTTON (FF)
66
3-227-297-01 BUTTON (PLAY)
67
3-227-300-01 BUTTON (REW)
68
3-235-970-01 CHASSIS
69
3-318-203-32 SCREW (B1.7), TAPPING
70
3-235-983-01 SPRING
71
3-235-974-01 LID, BATTERY CASE
72
3-231-465-02 SPRING, TORSION
73
3-921-878-02 TERMINAL BOARD, BATTERY
74
3-922-445-02 SHEET, BATTERY
75
3-922-447-21 PACKING, DC JACK
76
3-326-560-02 RING (DIA. 2.5XDIA. 4.5), O
77
3-221-299-01 LEVER (HOLD)
78
3-318-201-51 SCREW (B) (1.4X4), TAPPING
79
X-3381-680-1 BUTTON (BAND) SUB ASSY
80
X-3381-681-1 BUTTON (PRESET) SUB ASSY
81
3-018-075-01 SPACER
* 82
1-682-796-11 H/P BOARD
83
3-221-310-01 LEVER (VOL) (B)
L4
1-424-999-11 COIL, FERRITE-ROD ANTENNA (MW)
LCD701 1-804-256-11 LIQUID CRYSTAL DISPLAY
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9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
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WM-FS555/FS556
17
HP901
M601
not
supplied
not
supplied
not
supplied
not
supplied
not
supplied
not
supplied
101
103
103
104
105
105
106
108
106
110
111
112
113
114
115
117
118
119
120
121
122
123
124
126
128
129
109
127
5-3. MECHANISM SECTION
(MF-WMFS555-114)
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
101
X-3369-749-8 PINCH LEVER (N) ASSY
103
X-3372-619-3 WHEEL ASSY (NP), CAPSTAN
104
3-704-197-71 SCREW (M1.4)
105
3-024-223-11 GEAR (REEL-2)
106
3-921-797-01 WASHER
108
3-920-993-02 SPRING (NR)
109
3-014-709-01 SPRING (FR LEVER OW)
110
3-938-657-01 BELT
111
3-105-436-01 SPRING (STOP)
112
3-013-142-02 SPRING (FR-CP)
113
3-021-786-01 LEVER (FS), D SELECTION
114
3-921-043-12 GEAR (D)
115
X-3376-169-4 CLUTCH ASSY
117
3-921-050-01 GEAR (B)
118
3-920-990-21 SPRING (UD), COMPRESSION
119
3-921-335-03 WASHER, LEVER
120
3-923-530-11 SLEEVE (M)
121
3-728-091-01 WASHER, STOPPER
122
3-921-052-14 LEVER (A), DETECTION
123
3-920-994-11 SPRING (D SELECTION)
124
3-929-419-03 LEVER (BR), DETECTION
126
3-704-197-01 SCREW (M1.4), SPECIAL HEAD
127
X-3380-431-1 CHASSIS COMP ASSY
128
X-3369-748-8 PINCH LEVER (R) ASSY
129
3-920-997-01 SPRING (PINCH R)
HP901
1-500-648-12 HEAD, MAGNETIC (PLAYBACK)
M601
1-763-798-11 MOTOR (CAPSTAN/REEL) (including PULLEY)
Ver 1.1 2003.01
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9
2
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9
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9
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9
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9
4
2
9
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5
1
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1
3
6
7
3
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Q
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18
WM-FS555/FS556
SECTION 6
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, -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.... : µ A.... , uPA.... : µ PA....
uPB.... : µ PB.... , uPC.... : µ PC....
uPD.... : µ PD....
• CAPACITORS
uF : µ F
• COILS
uH : µ H
When indicating parts by reference num-
ber, please include the board.
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
*
1-682-796-11 H/P BOARD
**********
*
1-757-684-12 WIRE
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