Text preview for : WM-FX171 WM-FX173 WM-FX-177.pdf part of Sony WM-FX171 WM-FX173 WM-FX-177 Service Manual for Sony Stereo Cassette Player (Walkman) WM-FX171 WM-FX173 WM-FX-177.
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WM-FX171/FX173/FX177
SERVICE MANUAL Canadian Model
WM-FX173/FX177
AEP Model
E Model
WM-FX171/FX173
Photo : WM-FX173
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MF-WMFX171-114
SPECIFICATIONS
· Frequency range
FM : 87.6 - 107.9 MHz
AM : 531 - 1,602 kHz
· Power requirements
3V DC batteries R6 (AA) × 2 / External DC 3V power sources
· Dimensions
FX173 : 88.5 × 118.6 × 38.2 mm
(3 1/ 2 × 4 3/ 4 × 1 9/ 16 inches) (w / h / d) incl. projecting parts and controls
FX171/FX177 : 88.5 × 118.6 × 37.6 mm
(3 1/ 2 × 4 3/ 4 × 1 1/ 2 inches) (w / h / d) incl. projecting parts and controls
· Mass
FX173 : Approx. 165 g (5.9 oz) / Approx. 245g (8.7 oz) incl. batteries
and a cassette
FX171/FX177 : Approx. 160 g (5.7 oz) / Approx. 240 g (8.5 oz) incl.
batteries and a cassette
· Supplied accessories
Stereo headphone or Stereo earphones (1) / Belt clip (1)
Design and specifications are subject to change without notice.
RADIO CASSETTE PLAYER
MICROFILM
TABLE OF CONTENTS
1. GENERAL ······································································ 2 Flexible Circuit Board Repairing
· Keep the temperature of the soldering iron aroud 270° C during
2. DISASSEMBLY repairing.
2-1. Cabinet (Front) Assy ·························································· 3 · Do not touch the soldering iron on the same conductor of the
2-2. Main Board ········································································· 4 circuit board (within 3 times).
2-3. Cassette Lid ········································································ 4 · Be careful not to apply force on the conductor when soldering
2-4. Mechanism Deck ································································ 5 or unsoldering.
2-5. Belt, Motor (Reel/Capstan) ················································ 5
Notes on chip component replacement
3. MECHANICAL ADJUSTMENT ······························ 6 · Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
4. ELECTRICAL ADJUSTMENT ································ 6
5. DIAGRAMS
5-1. Block Diagram ··································································· 8
5-2. Schematic Diagram (FX171/FX177 Models) ·················· 10
5-3. Printed Wiring Board (FX171/FX177 Models) ················ 13
5-4. Printed Wiring Board (FX173 Model) ····························· 17
5-5. Schematic Diagram (FX173 Model) ································ 21
5-6. IC Block Diagrams ··························································· 24
6. EXPLODED VIEWS
6-1. Cabinet Section ································································· 25
6-2. Main Board Section ·························································· 27
6-3. Mechanism Section-1 ······················································· 28
6-4. Mechanism Section-2 ······················································· 29
7. ELECTRICAL PARTS LIST ··································· 30
SECTION 1 This section is extracted
GENERAL from instruction manual.
· LOCATION OF CONTROL
--2--
SECTION 2
DISASSEMBLY
· This set can be disassembled in the order shown below.
2-1. CABINET (FRONT) ASSY 2-2. MAIN BOARD 2-4. MECHANISM DECK 2-5. BELT, MOTOR (REEL/CAPSTAN)
2-3. CASSETTE LID
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (FRONT) ASSY
2 Insert the precision screwdriver
(1.4 mm flat-blade) into the slit
at claw A and release the claw.
3 Remove the cabinet (front) assy.
(Release all claws B to L in
alphabetical order.)
Cassette lid
A
Cabinet (front) assy
E
1 Two screws F
[screw (B 1.7 × 9), tapping] D
G
C
B
H
I
L J
K
--3--
2-2. MAIN BOARD
3 Remove the four solders.
4 Screw (M 1.4), toothed lock (WH)
2 Flexible board (CN302)
6 MAIN board
5 Two claws 1 Head flexible board (CN301)
2-3. CASSETTE LID
2 Insert a precision screwdriver
(1.4 mm flat-blade) vertically
into portion A to release the 5 Spring (torsion)
hinge plate.
3 Portion B to release the
hinge plate.
B
A
1 Open the cassette lid.
4 Cassette lid.
--4--
2-4. MECHANISM DECK
2 Remove the mechanism deck
in the direction of the arrow,
1 Insert the precision screwdriver
(1.4 mm flat-blabe) in to the slit
and release two claws.
2-5. BELT, MOTOR (REEL/CAPSTAN)
2 Two screws [screw (M 1.4), special head]
3 Motor (reel/capstan)
1 Belt
--5--
SECTION 3 SECTION 4
MECHANICAL ADJUSTMENT ELECTRICAL ADJUSTMENT
PRECAUTION PRECAUTION
1. Clean the following parts with a denatured-alcahol-moistened 1. Specified voltage : 3.0V
sweb : 2. Switch position
Playback head Pinch roller AVLS switch : NORM
Rubber belt Capstan
2. Demagnetize the playback head using a demagnetizer. CASSETTE SECTION
3. Do not use a magnetized screwdriver for adjustments.
4. After adjusting, apply screw-locking compound onto the Test Tape
adjusted parts.
Type Signal Purpose
5. Unless specified otherwise, use a specified voltage (3.0V) to
perform the adjustments. WS-48A 3kHz, 0dB Tape Speed Adjustment
Torqu Measurement Tape Speed Adjustmnet
Mode Torque meter Meter reading Procedure :
FWD 20 - 30 g · cm Test tape
FWD CQ-102C WS-48A
Back Tension 0.4 - 2.0 g · cm (3kHz, 0dB)
*1 Frequency counter
REV 20 - 30 g · cm
REV CQ-102RC Set +
Back Tension 0.4 - 2.0 g · cm
FF PHONES jack
CQ-201B More than 40 g · cm
REW
1. Playback WS-48A (Tape center part) and adjust RV601 so that
the frequency counter reading becomes 3,000Hz ± 15Hz.
2. Playback WS-48A (Tape top and end).
Check that frequency counter reading is within 1.5% of the
reading of step1.
Adjustment Point :
[MAIN BOARD] -- SIDE B --
RV601 : Tape Speed
*1
16: E, EA, C & SA, PA Models.
32: AEP, IT, E, CND, FR Models.
· Abbreviation
CND : Canadian
IT : Italian
EE : East European
EA : Saudi Arabia
FR : French
PA : Panama
C & SA : Central and South America
--6--
WM-FX171/FX173/FX177
5-2. SCHEMATIC DIAGRAM
(FX171/FX177 MODELS)
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 and 1 /4 W or less unless otherwise
specified.
· ¢ : internal component.
· C : panel designation.
· 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 external power voltage jack.
· Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : PB (TAPE)
( ) : AM
< > : FM
· Voltages are taken with a VOM (Input impedance 10 M).
Voltage variations may be noted due to normal produc-
tion tolerances.
· Signal path.
F : FM
f : AM
E : PB 10 10 10 10
· Abbreviation
CND : Canadian model
IT : Italian model
EE : East European model
EA : Saudi Arabia model
FR : French model
PA : Panama model
C & SA: Central and South America models
-- 10 -- -- 11 -- -- 12 --
WM-FX171/FX173/FX177
5-3. PRINTED WIRING BOARD
(FX171/FX177 MODELS) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
· Semiconductor
Location
Ref. No. Location A
D120 G-13
MEGA BASS UNIT
M901
IC1 F-14 MAIN BOARD (SIDE A) MAIN BOARD (SIDE B) REEL/CAPSTAN
6
IC301 E-17 OFF MOTOR
IC601 E-18 4
2 ON
S305
Q2 G-14 B
ORG
WHT
RED
AVLS
BLK
Q101 E-15 NORM
DRY BATTERY
Q201 E-15 SIZE "AA"
Q301 F-16 (IEC DESIGNATION R6)
LIMIT 2PCS, 3V
Q302 F-14
J302 C&SA,PA
FX177 MODEL
C
WHT
ORG
RED
BLK
1 6
EXCEPT C&SA,PA,FX177
L1 MODEL J301
DX FM ST NORM
LOCAL MONO CrO2/ DC IN 3V
D C&SA,PA, EXCEPT
METAL
FX177 C&SA,PA, E,C&SA,EA,PA
MODEL FX177 MODEL
MODEL
19 18 15 109
1/4 2/4
5
25
TUNING 27 30 1
E 1 24 28 36
4/4 3/4
5 20
10 15
12 13
F
RV301 L
(VOLUME) R 6 1
(POWER)
G (BATT) 1-667-714- 11
16 (11)
HP901
Note: FM AM TAPE (PLAYBACK HEAD)
(RADIO OFF)
· X : parts extracted from the component side. 4
· ® : Through hole. L 5
· b : Pattern from the side which enables seeing. 3
(The other layers' patterns are not indicated.) R
H
Caution: 2
Pattern face side: Parts on the pattern face side seen from
(Conductor B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component A) the parts face are indicated.
· Abbreviation
CND : Canadian I
IT : Italian
EE : East European
EA : Saudi Arabia
FR : French
PA : Panama
C & SA: Central and South America
-- 13 -- -- 14 -- -- 15 -- -- 16 --
WM-FX171/FX173/FX177
5-4. PRINTED WIRING BOARD
(FX173 MODEL) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
· Semiconductor
Location A
Ref. No. Location MEGA BASS UNIT
7
D120 G-13 8 HIGH
M901
MAIN BOARD (SIDE A) MAIN BOARD (SIDE B) 6 REEL/CAPSTAN
IC1 F-14 MOTOR
5 HIGH
IC301 E-17
IC601 E-18 4 LOW
B S305 3 OFF
ORG
WHT
RED
Q2 G-14 AVLS
BLK
2
NORM DRY BATTERY
Q101 E-15 ON SIZE "AA"
Q201 E-15 (IEC DESIGNATION R6)
LIMIT
Q301 F-16 2PCS, 3V
Q302 F-14
J302 C&SA,CND
C MODEL
WHT
ORG
RED
BLK
1 9
EXCEPT C&SA,CND
L1 MODEL J301
DX FM ST NORM
DC IN 3V
D LOCAL MONO CrO2/
METAL
C&SA,CND EXCEPT
MODEL C&SA,CND E,C&SA,EA
MODEL MODEL
19 18 15 109
1/4 2/4
5
25
TUNING
E 27 30
28
1
36
1 24
4/4 3/4
5 20
10 15
F 12 13
RV301 L
(VOLUME) R 6 1
(POWER)
G
(BATT) 1-667-151- 11
16 (11)
HP901
FM AM TAPE (PLAYBACK HEAD)
Note: (RADIO OFF)
4
· X : parts extracted from the component side. L 5
· ® : Through hole.
3
· b : Pattern from the side which enables seeing. H R
(The other layers' patterns are not indicated.)
2
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component A) the parts face are indicated.
· Abbreviation I
CND : Canadian
IT : Italian
EE : East European
EA : Saudi Arabia
FR : French
C & SA: Central and South America
-- 17 -- -- 18 -- -- 19 -- -- 20 --
WM-FX171/FX173/FX177
5-5. SCHEMATIC DIAGRAM
(FX173 MODEL)
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 and 1 /4 W or less unless otherwise
specified.
· ¢ : internal component.
· C : panel designation.
· 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 external power voltage jack.
· Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : PB (TAPE)
( ) : AM
< > : FM
· Voltages are taken with a VOM (Input impedance 10 M).
Voltage variations may be noted due to normal produc-
tion tolerances.
· Signal path.
F : FM
f : AM
E : PB
· Abbreviation
CND : Canadian model
IT : Italian model
EE : East European model
EA : Saudi Arabia model
FR : French model
C & SA: Central and South America models
-- 21 -- -- 22 -- -- 23 --
6-2. MAIN BOARD SECTION
MF-WMFX171-114
54
55
56
57
59
58
60
61
53
52
51
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
51 3-015-285-01 SCREW (M1.4), TOOTHED LOCK (WH) 52 A-3021-036-A MAIN BOARD, COMPLETE (FX171: EA)
52 A-3021-046-A MAIN BOARD, COMPLETE (FX173: C&SA) 52 A-3021-035-A MAIN BOARD, COMPLETE (FX171: E)
52 A-3021-033-A MAIN BOARD, COMPLETE (FX177) 52 A-3021-007-A MAIN BOARD, COMPLETE (FX171: AEP)
52 A-3021-047-A MAIN BOARD, COMPLETE (FX173: IT) 52 A-3021-037-A MAIN BOARD, COMPLETE (FX171: C&SA, PA)
52 A-3021-044-A MAIN BOARD, COMPLETE (FX173: FR) 53 3-019-862-01 TERMINAL (+), BATTERY
52 A-3021-048-A MAIN BOARD, COMPLETE (FX173: EE) 54 3-019-859-01 BUTTON (STOP)
52 A-3021-045-A MAIN BOARD, COMPLETE (FX173: EA) 55 3-019-861-01 BUTTON (REW)
52 A-3021-049-A MAIN BOARD, COMPLETE (FX173: E, 9E) 56 3-019-858-01 BUTTON (PLAY)
52 A-3021-050-A MAIN BOARD, COMPLETE (FX173: CND) 57 3-019-860-01 BUTTON (FF)
52 A-3021-051-A MAIN BOARD, COMPLETE (FX173: AEP) 58 3-022-579-01 TERMINAL (), BATTERY
52 A-3021-034-A MAIN BOARD, COMPLETE (FX171: EE) 59 3-022-294-01 POINTER
52 A-3021-032-A MAIN BOARD, COMPLETE (FX171: IT) 60 1-501-962-11 ANTENNA, FERRITE-ROD M
52 A-3021-038-A MAIN BOARD, COMPLETE (FX171: FR) 61 3-022-239-01 KNOB, TUNING
-- 27 --
6-3. MECHANISM SECTION-1 (MF-WMFX171-114)
104
HP901
102
105
103
M901 106
101
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
101 3-013-560-11 BELT 105 X-3369-749-1 PINCH LEVER (N) ASSY
102 3-703-816-31 SCREW (M1.4), SPECIAL HEAD 106 3-920-996-01 SPRING (PINCH N)
103 3-921-042-01 GEAR (REEL) HP901 1-667-291-11 HEAD FLEXIBLE BOARD(W/PLAYBACK HEAD)
104 3-703-816-73 SCREW (M1.4), SPECIAL HEAD M901 1-763-073-11 MOTOR
-- 28 --
6-4. MECHANISM SECTION-2 (MF-WMFX171-114)
159
160
158 161
162
163
164
155
157
156
165
154
168
166
153 167
152
151
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
151 3-921-797-01 WASHER 160 3-923-530-01 SLEEVE (M)
152 3-921-003-01 BEARING 161 3-921-335-01 WASHER, LEVER
153 3-938-628-01 SPRING (PLAY-CP) 162 3-920-990-01 SPRING (UD), COMPRESSION
154 3-920-999-01 GEAR (A) 163 3-921-050-01 GEAR (B)
155 X-3369-752-1 CLUTCH ASSY 164 X-3372-619-1 WHEEL ASSY (NP), CAPSTAN
156 3-013-142-01 SPRING (FR-CP) 165 3-921-043-01 GEAR (D)
157 3-015-436-01 SPRING (STOP) 166 3-014-709-01 SPRING (FR LEVER OW)
158 3-938-613-01 LEVER (OW), DETECTION 167 X-3375-054-1 CHASSIS ASSY (GL-02)
159 3-728-091-01 WASHER, STOPPER 168 3-016-989-01 SPRING (SW-CP)
-- 29 --
SECTION 7
MAIN ELECTRICAL PARTS LIST
NOTE:
When indicating parts by reference number, · Due to standardization, replacements in the · RESISTORS
please include the board name. parts list may be different from the parts All resistors are in ohms.
specified in the diagrams or the components METAL: metal-film resistor
· Abbreviation used on the set. METAL OXIDE: Metal Oxide-film resistor
CND : Canadian · -XX, -X mean standardized parts, so they may F: nonflammable
IT : Italian have some difference from the original one. · COILS
EE : East European · Items marked "*" are not stocked since they uH: µH
EA : Saudi Arabia are seldom required for routine service. Some · SEMICONDUCTORS
FR : French delay should be anticipated when ordering these In each case, u: µ, for example:
PA : Panama items. uA...: µA... , uPA... , µPA... ,
C & SA : Central and South America · CAPACITORS: uPB... , µPB... , uPC... , µPC... ,
uF: µF uPD..., µPD...
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
A-3021-007-A MAIN BOARD, COMPLETE (FX171: AEP) C5 1-162-937-11 CERAMIC CHIP 6PF 0.5PF 50V
********************* C6 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
A-3021-032-A MAIN BOARD, COMPLETE (FX171: IT) C7 1-165-128-11 CERAMIC CHIP 0.22uF 16V
********************* C8 1-164-156-11 CERAMIC CHIP 0.1uF 25V
A-3021-034-A MAIN BOARD, COMPLETE (FX171: EE) C9 1-115-156-11 CERAMIC CHIP 1uF 10V
*********************
A-3021-035-A MAIN BOARD, COMPLETE (FX171: E) C10 1-164-156-11 CERAMIC CHIP 0.1uF 25V
********************* C11 1-107-823-11 CERAMIC CHIP 0.47uF 10% 16V
A-3021-036-A MAIN BOARD, COMPLETE (FX171: EA) C12 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
********************* C14 1-126-163-11 ELECT 4.7uF 20% 50V
A-3021-037-A MAIN BOARD, COMPLETE (FX171: C&SA, PA) C15 1-164-677-11 CERAMIC CHIP 0.033uF 10% 16V
*********************
A-3021-038-A MAIN BOARD, COMPLETE (FX171: FR) C16 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
********************* C17 1-126-154-11 ELECT 47uF 20% 6.3V
A-3021-050-A MAIN BOARD, COMPLETE (FX173: CND) C18 1-163-022-00 CERAMIC CHIP 0.012uF 10% 50V
********************* (AEP, IT, FR, EE, E, EA)
A-3021-051-A MAIN BOARD, COMPLETE (FX173: AEP) C18 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V
********************* (C&SA, PA, CND)
A-3021-047-A MAIN BOARD, COMPLETE (FX173: IT) C19 1-163-022-00 CERAMIC CHIP 0.012uF 10% 50V
********************* (AEP, IT, FR, EE, E, EA)
A-3021-044-A MAIN BOARD, COMPLETE (FX173: FR)
********************* C19 1-163-037-11 CERAMIC CHIP 0.022uF 10% 25V
A-3021-048-A MAIN BOARD, COMPLETE (FX173: EE)