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WM-FX141
SERVICE MANUAL
Ver 1.3 1999. 05
With SUPPLEMENT-1 (9-923-296-81) With SUPPLEMENT-2 (9-923-296-82)
US Model AEP Model E Model
Model Name Using Similar Mechanism Tape Transport Mechanism Type
WM-FX101 MF-WMFX103-48
SPECIFICATIONS
Radio Frequency FM : 87.6 108 MHz (US, Chilean, Latin America, Central and South America Models) : 65.0 107.9MHz (East European Model) : 87.6 107.9 MHz (Other Models) AM : 530 1,710 kHz (US, Chilean, Latin America, Central and South America Models) : 531 1,602kHz (Other Models) Power requirements 3V DC batteries R6 (size AA) × 2 External DC 3V power sources Battery life (Aprroximate hours) Battery Sony alkaline LR6 (SG) Sony R6P (SR) Playback 16 hrs 4.5 hrs Radio 48 hrs 16 hrs Dimensions 93.9 × 118.5 × 35.9 mm (w/h/d) (33/4 × 43/4 × 13/16 in.) incl. projecting parts Mass 205g (7.3 oz) incl.batteries Supplied accessories · Stereo headphones or earphones (1) · Belt clip (1) Design and specifications are subject to change without notice.
RADIO CASSETTE PLAYER
MICROFILM
TABLE OF CONTENTS 1. GENERAL ·········································································· 3 2. DISASSEMBLY
2-1. Cabinet (Rear) ································································· 4 2-2. Mechanism Deck and Main Board ································· 4 2-3. Main Board ····································································· 5 2-4. Cassette Lid ····································································· 5 2-5. Dial Pointer Setting ························································· 5
3. ADJUSTMENT
3-1. Mechanical Adjustment ·················································· 6 3-2. Electrical Adjustment ······················································ 6
4. DIAGRAMS
4-1. Block Diagram ································································ 9 4-2. Schematic Diagram ······················································· 11 4-3. Printed Wiring Board ···················································· 13 4-4. IC Block Diagram ························································· 17
5. EXPLODED VIEWS
5-1. Cabinet and Board Section ··········································· 18 5-2. Mechanism Section (MF-WMFX103-48) ···················· 19
6. ELECTRICAL PARTS LIST ······································· 20
Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing · Keep the temperature of 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.
--2--
SECTION 1 GENERAL
This section is extracted from instruction manual.
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SECTION 2 DISASSEMBLY
Note : Disassemble the unit in the order as shown below.
Mechanism deck and main board Main board Cassette lid Dial pointer setting
Cabinet (Rear)
Note :
Follow the disassembly procedure in the numerical order given.
2-1.
CABINET (REAR)
B
C A D E
Cassette lid
I F K G H J L M
Cabinet(rear)
1 Open the cassette lid and release claw A. 2 Remove the cabinet(rear).(Release all claws B from M in alphabetical order.)
2-2.
MECHANISM DECK AND MAIN BOARD
1 Remove the mechanism deck and main board in the direction of the arrow.
mechanism deck and MAIN board
head flexible board
* note for installation : Make sure to put the head flexible board to ditch before install the mechanism deck and MAIN board.
--4--
2-3.
MAIN BOARD
1 head flexible board
3 MAIN board
2 claws
2-4.
CASSETTE LID
B
A
2 Release the catch B.
1 Release the catch A.
Front cabinet
3 Cassette lid (Remove it in the direction of the arrow)
2-5.
DIAL POINTER SETTING
2 Align pointer with arrow marked side as shown in Fig.1 and then fit to groove in the order of A and B.
Pointer
A
B
Align Pointer Fig. 1
1 Rotate tune knob fully to arrow direction.
--5--
SECTION 3 ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS 3-2. ELECTRICAL ADJUSTMENTS
Precaution 1. Clean the following parts with a denatured-alcohol-moistend swab : playback head pinch roller capstan rubber belts 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 perfomed with the rated power supply voltage (2.5V) unless otherwise noted. Torque Measurement Mode FWD FWD Back Tension FF, REW CQ-201B CQ-102C Torque meter Meter reading 20 to 42 g·cm (0.28 to 0.58 oz·inch) less than 2 g·cm (less than 0.03 oz·inch) more than 60 g·cm (more than 0.83 oz·inch)
Precaution · Supplied voltage : 2.5V · Switch and control position TAPE switch : NORM VOLUME control : maximum AVLS switch : OFF
TAPE SECTION
· FUNCTION switch : TAPE Test tape Type WS-48A Signal 3kHz, 0dB
0dB=0.775V
Used for Tape Speed Adjustment
Tape speed adjustment Tape selection adjustment : NORM Procedure :
test tape WS-48A (3kHz, 0dB) 16 set frequency counter
J302(phones)
Adjustment Value: normal tape speed Adjust the tape speed adjustment RV601, so that the freqency counter reading becomes 3,000Hz. Specification Value: Digital frequency counter 2,945 to 3,015Hz Frequency difference between the beginning and the end of the tape should be within 1.5% (45Hz). Adjustment Location :
--6--
TUNER SECTION
[AM] BAND: AM Signal generator
AM RF signal generator
0 dB = 1 µV
· ·
Repeat the procedures in each adjustment several times for the maximum level meter indication. The frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. AM IF ADJUSTMENT
Put the lead-wire antenna close to the set.
Adjust for a maximum reading on level meter. T1 455kHz
AM TRACKING ADJUSTMENT
30% amplitude modulation by 400Hz signal. Output level : as low as possible
Adjust for a maximum reading on level meter. L1 620kHz(800kHz) CT1 1,400kHz(1,300kHz)
[FM] BAND : FM Signal generator
FM RF signal generator 0.01µF antenna terminal 75kHz(100%) amplitude modulation by 1kHz signal. Output level: as low as possible
level meter 16 set
AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L4 CT4 505kHz(516.5kHz) 1,750kHz(1,631.5kHz)
FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L2 CT2 86.0MHz[64MHz] 109.5MHz
FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L3 86.0MHz[64MHz] 109.5MHz ) :E, Mexican, East European, AEP [ ] : East European Adjustment Location: Main board (See page 8) ( CT3
J302 (phones)
--7--
Adjustment Location : Main board
antenna terminal
CT3 FM Frequency T1 coverage CT4 Adjustment AM IF AM Frequency Adjustment coverage Adjustment
L4 AM Frequency coverage Adjustment
CT1 AM Tracking Adjustment L1 AM Tracking Adjustment L3 FM Frequency coverage Adjustment L2 CT2 FM Tracking FM Tracking Adjustment Adjustment
--8--
SECTION 4 DIAGRAM
4-1. BLOCK DIAGRAM
S303(2/2) DX LOCAL
WM-FX141
E,MX,EE,AEP MODEL LPF CP1
IC1
FM/AM,RF/AF AMP 19 DET OUT 18 MPX IN
CV1 AM TRACKING CT1 L1 CV2 CT2 L2 CV3 CT3 L3 CV4 AM FREQ. COVER CT4 L4
1 FM RF IN
24 AM RF IN FM MIX 3
CF2
L OUT 14 8 FM IF IN
IC301
HP901 R OUT 13 23 FM RF OUT AM MIX 4 21 FM OSC AM IF T1 CF1 7 AM IF IN VCO QUAD VCC2 LP2 15 12 6 16 PLAYBACK HEAD JC2 L E,MX,EE,AEP MODEL R X2 X1 19kHz 10.7MHz 20 AM OSC VCC1 22 16 RV601 TAPE SPEED 13 23 22 17 20 19 2 5 28 25 RV301 VOLUME 6 9 8 2 1 OFF 24 AUDIO AMP MOTOR DRIVE J302 18 PHONES
FM TRACKING
FM FREQ. COVER
S305 AVLS
+
M
M901 REEL/CAPSTAN MOTOR
S303(1/2) (TAPE SEL) CrO2/METAL NORM
Q301 SWITCH
S304 (FUNCTION) FM AM TAPE
S302 POWER
J301 DC IN 3V
· Signal path : FM : AM E : PB · Abbreviation EE : East European model MX : Mexican model
--9--
-- 10 --
WM-FX141
4-2.
SCHEMATIC DIAGRAM -- MAIN SECTION --
E,MX,EE,AEP MODEL L3,CT3 FM FREQ. COVER JC2
L4,CT4 AM FREQ. COVER
LOCAL DX S303(2/2) CV1-4 TUNING
L1 AM FERRITE-ROD ANTENNA
JC3
L1
L2
L3
C3
*
*
JC6 L4 C4
C2
*
C1
C18 L1,CT1 AM TRACKING L2,CT2 FM TRACKING C5 R1
*
*
C19
*
*
JR5
US,5E,6E,8E MODEL
AEP,E,MX,EE MODEL LPF CP1
JR1
*
0.8
1.5
1.5
0
2.8
2.8
2.8
2
*
AM IF
10.7 MHz
L5
C16 0.022 0
R601 R602
*
*
· Waveform
R603
*
M901 (REEL/CAPSTAN)
1
IC1 !
1µsec/div 0.5V/div
19kHz
1.5 Vp-p
0 0 0 R102
R201 R101
*
J302
THP602 2k 1000PPM
*
*
R202
*
*
US,5E,6E,8E E,MX,AEP EE
C1
C2
C3
C4
C5 33PF 33PF
C18,C19 0.018uF 0.012uF
R1 22 22 18
R101,R201 R102,R202 R601 R602 R603 0 10 0 180k 39k 180k 3.9 1.5 1.5 5.6 2.2 2.2 750 680 680
1PF 18PF 22PF 6PF 1PF 18PF 22PF 6PF 3PF 6PF
8PF 9PF 0.0022uF/100v 0.012uF
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. · U : B+ Line. · H : adjustment for repair. · Power voltage is dc 3V and fed with regulated dc power supply from external power voltage jack (J301) . · Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : PB · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. · Signal path. F : FM f : AM E : PB · Abbreviation EE : East European model 5E : Chilean model 6E : Latin America model 8E : Central and South America model MX : Mexican model
-- 11 --
-- 12 --
WM-FX141
4-3. PRINTED WIRING BOARD -- MAIN SECTION --
1 A
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
B
C
D
E
F
· Semiconductor
Location
Ref. No. Location E-9 D-6 E-5
G
IC1 IC301 Q301
Note: · X : parts extracted from the component side. · Y : parts extracted from the conductor side. ® · : Through hole. · b : Pattern from the side which enables seeing. · Abbreviation EE : East European model 5E : Chilean model 6E : Latin America model 8E : Central and South America model MX : Mexican model
-- 13 --
-- 14 --
-- 15 --
-- 16 --
MAIN
Ref. No. Part No. Description < JUMPER CAPACITOR > JC2 JC3 JC6 1-216-295-91 SHORT 1-216-295-91 SHORT 1-216-295-91 SHORT 0 (EE, E, MX, AEP) 0 (EE, E, MX, AEP) 0 Remarks Ref. No. R601 R602 R602 Part No. Description 1.5 5.6 1.5 Remarks 5% 1/10W (EE, E, MX, AEP) 5% 1/10W (US, 5E, 6E, 8E) 5% 1/10W (EE, E, MX, AEP) 5% 1/10W (US, 5E, 6E, 8E) 5% 1/10W (EE, E, MX, AEP) 1-217-905-11 RES, CHIP 1-216-309-00 METAL CHIP 1-217-905-11 METAL CHIP
< JUMPER RESISTOR > R603 JR1 JR5 JR7 1-216-295-91 SHORT 1-216-295-91 SHORT 1-216-296-91 SHORT < COIL > L2 L2 L3 L3 L4 L4 L5 L101 L201 L301 1-460-120-11 1-426-578-11 1-403-696-11 1-409-655-11 1-406-408-11 COIL (WITH CORE) (EXCEPT EE) COIL (WITH CORE) (EE) COIL (WITH CORE) (EXCEPT EE) COIL (WITH CORE) (EE) COIL (OSC) (EXCEPT EE) RV301 RV601 0 (US, 5E, 6E, 8E) 0 (US, 5E, 6E, 8E) 0 (US, 5E, 6E, 8E) R603 1-216-046-00 METAL CHIP 1-216-045-00 METAL CHIP 750 680
< VARIABLE RESISTOR > 1-223-609-21 RES, VAR, CARBON 10K/10K 1-241-028-11 RES, ADJ, CARBON 330 < SWITCH > S302 S303 S304 S305 1-571-986-11 1-692-298-11 1-692-299-11 1-692-898-11 SWITCH, LEAF (POWER) SWITCH, SLIDE (TAPE SEL) SWITCH, SLIDE (FM/AM TAPE) SWITCH, SLIDE (AVLS) < TRANSFORMER > T1 1-404-949-11 TRANSFORMER, IF < THERMISTOR(POSITIVE) >
1-406-409-11 COIL (OSC) (EE) 1-500-245-11 INDUCTOR CHIP 0uH 1-500-245-11 INDUCTOR CHIP 0uH 1-500-245-11 INDUCTOR CHIP 0uH 1-500-245-11 INDUCTOR CHIP 0uH < TRANSISTOR >
Q301
8-729-230-49 TRANSISTOR 2SC2712-YG < RESISTOR > THP601 1-809-279-11 THERMISTOR, POSITIVE THP602 1-810-764-11 THERMISTOR, POSITIVE 22 18 22K 15K 15K 330 5% 1/10W (EXCEPT EE) 0.5% 1/10W (EE) 5% 1/10W 5% 1/10W 5% 1/10W 5% 1/10W < VIBRATOR > X1 X2 1-577-091-11 OSCILLATOR, CRYSTAL (19kHz) 1-567-097-61 FILTER, CERAMIC (10.7MHz)
R1 R1 R2 R3 R4 R5 R101 R101 R102 R102 R201 R201 R202 R202 R301 R302 R303 R304 R601
1-216-009-00 METAL CHIP 1-216-609-11 METAL CHIP 1-216-081-00 1-216-077-00 1-216-077-00 1-216-037-00 METAL CHIP METAL CHIP METAL CHIP METAL CHIP
************************************************************ MISCELLANEOUS ************** L1 HP901 M901 X-3371-847-1 ANTENNA SUB ASSY, BAR 1-500-115-11 HEAD, MAGNETIC (PLAYBACK) 1-698-353-13 MOTOR, DC (REEL/CAPSTAN)(WITH PULLEY)
1-216-295-91 SHORT 1-216-001-00 METAL CHIP 1-216-103-00 METAL CHIP 1-216-689-11 METAL CHIP 1-216-295-91 SHORT 1-216-001-00 METAL CHIP 1-216-103-00 METAL CHIP 1-216-689-11 METAL CHIP 1-216-089-91 RES, CHIP 1-216-073-00 1-216-109-00 1-216-308-00 1-216-306-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP
0 (EXCEPT E, MX) 10 5%
1/10W (E, MX) 180K 5% 1/10W (EXCEPT E, MX) 39K 0.5% 1/10W (E, MX) 0 (EXCEPT E, MX) 10 5% 1/10W (E, MX) 180K 5% 1/10W (EXCEPT E, MX) 39K 0.5% 1/10W (E, MX) 47K 5% 1/10W 10K 330K 4.7 3.9 5% 1/10W 5% 1/10W 5% 1/10W 5% 1/10W (US, 5E, 6E, 8E)
************************************************************ ACCESSORIES & PACKING MATERIALS ******************************** 1-505-521-11 8-953-224-90 3-346-518-01 3-860-407-21 HEADPHONE (MDR-023) (US, E, EE, 8E, AEP) HEADPHONE (MDR-E802) (5E, 6E, MX) CLIP, BELT MANUAL, INSTRUCTION (ENGLISH) (US, EE, E)
3-860-407-31 MANUAL, INSTRUCTION (SPANISH, PORTUGUESE) (5E, 6E, 8E, MX) 3-860-407-61 MANUAL, INSTRUCTION (ENGLICH,POLISH,GREEK,THAI,CZECH, BRAZILIAN,HUNGARIAN,RUSSIAN) (AEP)
-- 21 --
WM-FX141
Sony Corporation
9-923-296-12
Personal Audio Company
-- 22 --
99D1644-1 Printed in Japan © 1999.4 Published by General Engineering Dept.