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WM-PA1
SERVICE MANUAL
E Model
Model Name Using Similar Machanism Tape Transport Mechanism Type
WM-FX123 MF-WMFX103-48CY
SPECIFICATIONS
Radio Section FM :87.6 108MHz AM :530 1,710kHz Power Requirements 3V DC Batteries AA (R6) x 2 External DC 3V power sources Battery Life (approximate hours when using the batteries specified below) Battery Sony Alkaline LR6 (SG) Sony R6P (SR) Dimensions 94.2x 119.0 x 36.0 mm Mass 260g incl. batteries and tape Supplied Accessories · Stereo headphones (1) · Belt clip (1) Design and specifications are subject to change without notice. Playback 16 hours 4.5 hours Radio 48 hours 16 hours
RADIO CASSETTE PLAYER
MICROFILM
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL
Location and Function of Controls .................................... 2
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 damaged by heat.
2. DISASSEMBLY
2-1. Cabinet (Rear) Removal ............................................. 2-2. Cabinet (Front) Removal ............................................ 2-3. Main Board, Mechanism Deck Removal ................... 2-4. Cassette Holder Sub Assy Removal ........................... 2-5. Switch board Removal ............................................... 2-6. Dial Pointer Setting .................................................... 3 3 4 4 5 5
3. ADJUSTMENTS
3-1. Mechanical Adjustment .............................................. 6 3-2. Electrical Adjustment ................................................. 6
4. DIAGRAMS
4-1. Block Diagram ............................................................ 8 4-2. Printed Wiring Boards .............................................. 10 4-3. Schematic Diagram ................................................... 15
· HOW TO CHANGED THE CERAMIC FILTERS This model is used two ceramic filters of CF2 and X2. You must used same type of color marked ceramic filters in order to meet same specifications. Therefore, the ceramic filter must changed two pieces together since it's supply two pieces in one package as a spare parts
mark
Mark
mark
Center Frequency 10.70MHz 10.67MHz 10.73MHz 10.64MHz 10.76MHz
red
CF2 X2
blue orange black white
5. EXPLODED VIEWS
5-1. Cabinet and Board Section ....................................... 19 5-2. Mechanism Deck Section ......................................... 20
6. ELECTRICAL PARTS LIST ................................ 21
SECTION 1 GENERAL
LOCATION AND FUNCTION OF CONTROLS
2
VOLUME TUNING · · NORM CrO2/ METAL DX LOCAL
FM AM TAPE (RADIO OFF)
· · NORM LIMIT AVLS
SPEAKER SWITCH
p
0) SPEAKER
PLAY DC IN 3V
2
SECTION 2 DISASSEMBLY
r
The equipment can be removed using the following procedure. Cabinet (Rear) Cabinet (Front) Main board, Mechanism deck Cassette holder sub assy Switch board
Set
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (REAR) REMOVAL
Cassette holder sub assy
1 4 4 2 2 7 6 7 3 3 7 7 7 6 5 6
Cabinet (Rear)
8
2-2. CABINET (FRONT) REMOVAL
2 1 Flexible board
Cabinet (Front)
3
2-3. MAIN BOARD, MECHANISM DECK REMOVAL
1 Remove solder 2 Head flexible board
Main board
4
Mechanism deck
3 Claw
3 Claws
2-4. CASSETTE HOLDER SUB ASSY REMOVAL
Cabinet (Front)
3 Flexible board
2
Cassette holder sub assy
4 1
NOTE FOR INSTALLATION
The torsion spring will be removed together with the cassette lid that preform the following for installation.
r TORSION
SPRING
1 Attach the torsion spring as shown in the figure
3 Lift the torsion spring in the arrow direction and hook it properly
2 Insert the torsion spring in the hole as shown in the figure.
4
SECTION 3 ADJUSTMENTS
2-5. SWITCH BOARD REMOVAL
1 Screws (1.7x3) tapping
SECTION 4 DIAGRAMS
TUNER SECTION
AM Section BAND : AM
AM RF signal generator Put the lead-wire antenna close to the set.
WM-PA1
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 using a head demagnetizer. 3. Do not use a magnetized screwdriver for 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 Torque Torque Meter Meter Reading 20 42 g · cm CQ-102C FWD back tension FF, REW CQ-201B (0.28 0.58 oz· inch) less than 2 g · cm (less than 0.03 oz· inch) more than 60g · cm (more than 0.83 oz· inch) Tape Pulling Force Measurement
3-2. ELECTRICAL ADJUSTMENTS PRECAUTION · Specified voltage : 2.5V. · Switch and control position TAPE switch : NORM VOLUME control : maximum AVLS switch : NORM
AM IF ALIGNMENT Adjust for a maximum reading on level meter. T1 1,000kHz
4-1. BLOCK DIAGRAM
AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L4 505kHz 1,750kHz CT14
TAPE SECTION
Test Tape Type WS-48A Signal 3kHz, 0dB Used for Tape Speed Adjustment
Retainer, Speaker
30% amplitude modulation by 400Hz signal. Output level : as low as possible
AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L1 CT11 620kHz 1,400kHz
Switch board
FM Section BAND : FM LOCAL/DX switch : DX
FM RF signal generator 0.01µF
Speaker
FWD
Tape Speed Adjustment Procedure :
test tape WS-48A (3kHz, 0dB) frequency counter 16 set
+
FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L3
(ANT TAP) (GND)
86.0MHz 109.5MHz
CT13
22.5kHz frequency deviation by 400Hz signal. Output level : as low as possible
FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter.
level meter
J302 (phones)
Cassette holder sub assy
Mode FWD
Torque Meter CQ-403A
Meter Reading more than 40 g (more than 1.42 oz) Play back WS-48A (tape center part) and adjust RV601 so that the frequency counter reading becomes 3,000 ± 15Hz. Frequency difference the beginning and the end of the tape should be within 1.5%. Adjustment Location :
set
L2 CT12
86.0MHz 109.5MHz
16
+
2-6. 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.
J302 (phones)
· Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.
Adjustment Location :
Ferrite-rod antenna sub assy
DC IN 3V S304 - 1
Pointer
RV601
[MAIN BOARD] (Side A)
b
CT14 : AM Frequency Coverage Adjustment
Align point Pointer
a
CT13 : FM Frequency Coverage Adjustment T1 : AM IF Alignment
S302 (MD POWER)
S304 FM
A B
(A=B)
AM
TA P E RADIO OFF
Ferrite-rod antenna sub assy Knob (tune)
3
Fig. 1
R V 601
Align point
TA P E S P EED
L4 : AM Frequency Coverage Adjustment L3 : FM Frequency Coverage Adjustment L2 : FM Tracking Adjustment CT12 : FM Tracking Adjustment CT11 : AM Tracking Adjustment L1 : AM Tracking Adjustment
· Signal path. : FM : PB
1 Rotate tune knob fully to arrow direction.
Main board
5
6
7
8
9
WM-PA1
4-3. SCHEMATIC DIAGRAM
r
IC BLOCK DIAGRAM
IC1 TA8122AF
AM RF IN FM RF OUT DET OUT AM OSC FM OSC MPX IN R OUT
13 STEREO DECODER HYS SW ST LED 11 12
24
23
22
21
20
19
18
17
16
15
14
FM OSC
AM OSC
PRE AF
PHASE COM
PHASE COM
VCO
AM RF
AM MIX
AM DET
FM/AM MONO SW FM DET
FREQ. DIVIDER
FM RF
FM MIX
AM AGC
AM IF
L DET
FM IF
TU LED
1
2
3
4
5
6
7
8
9
10
L OUT ST LED
VCC1
LPF1
LPF2
AM IF IN
FM IF IN
TUN LED
GND2
VCO
FM MIX
AM MIX
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. · : B+ Line. · : adjustment for repair. · Power voltage is dc 3V and fed with regulated dc power supply from external power voltage jack (J301). · Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM < > : PLAY · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Signal path. : FM : PB
15
16
17
FM RF IN
18
QUAD
GND1
AGC
VCC2
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. · Accessories and packing materials are given in the last of this parts list.
5-1. CABINET AND BOARD SECTION
12 13 14 15 16 11
L1
19
SP1
10
9
17 20
18
22 8 6
7
5 7
4 3
2
21
1
Ref. No. 1 2 3 4 5 6 7 8 9 * 10 11 12
Part No. X-3374-460-1 3-910-896-01 3-933-647-01 3-933-644-01 3-933-643-01 3-933-646-01 3-318-382-01 3-017-324-01 1-667-057-11 1-667-779-11 X-3374-461-1
Description CABINET (REAR) SUB ASSY GROUND, MOTOR BUTTON (STOP) BUTTON (FF) BUTTON (REW) BUTTON (PLAY) SCREW (1.7X3), TAPPING RETAINER, SPEAKER FLEXIBLE BOARD SWITCH BOARD HOLDER SUB ASSY, CASSETTE
Remark
Ref. No. 13 14 15 16 17 18 19 20 21 22 L1 SP1
Part No. 3-018-931-01 3-937-353-01 3-364-675-01 3-933-678-01 3-933-642-01 3-933-675-01 3-910-902-12 A-3016-981-A 3-937-356-01
Description SPRING, TORSION CABINET (FRONT) (CF-O) SPRING (CASSETTE) POINTER TERMINAL (+), BATTERY GEAR (TUNE) KNOB (TUNE) MAIN BOARD, COMPLETE LID, BATT
Remark
3-017-323-01 KNOB (SW)
3-910-895-01 TERMINAL (), BATTERY X-3371-847-1 ANTENNA SUB ASSY, FERRITE-ROD 1-505-794-11 SPEAKER
19
5-2. MECHANISM DECK SECTION (MF-WMFX103-48CY)
51
53
HP901
54 58 59 52 55
60
M901
62 57
not supplied not supplied
61
56
Ref. No. 51 52 53 54 55 56 57
Part No. X-3367-902-1 3-364-328-01 3-910-635-01 3-910-647-01 X-3368-729-1
Description ARM (N) ASSY, PINCH SPRING, COMPRESSION SCREW LEVER (PR/O), PLAY CHASSIS ASSY
Remark
Ref. No. 58 59 60 61 62 HP901 M901
Part No.
Description
Remark
3-909-727-01 GEAR (REVERSE) 3-364-320-01 GEAR (S REEL) 3-910-640-01 GEAR (T REEL) 3-321-483-11 X-3367-905-1 1-500-115-11 1-698-353-11 RING, RETAINING CLUTCH ASSY HEAD, MAGNETIC (PLAYBACK) MOTOR, DC (REEL, CAPSTAN)
3-354-868-01 BELT 3-352-758-21 SCREW (M1.7), TOOTHED LOCK
20
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 Remark Ref. No. C308 C309 C310 C311 C312 C313 C314 5% 5% 5% 10% 50V 50V 50V 50V 50V 50V 25V 25V 25V 25V 50V 50V 6.3V 25V 50V 6.3V 25V 25V 10V 50V 6.3V 50V 10V 50V 50V 50V 6.3V 50V 10V 50V 50V 16V 6.3V 25V 25V 50V 4V 16V C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C411 C412 C413 C601 C602 C603 C604 C605 Part No.
MAIN
When indicating parts by reference number, please include the board.
Ref. No.
Part No.
Description
Description 10uF 0.1uF 1uF 1uF 0.001uF 0.1uF 100PF 100PF 0.01uF 0.0047uF 1uF 0.0047uF 20%
Remark 16V 25V 10V 10V 50V 25V 50V 50V 50V 50V 10V 50V 50V 16V 25V 25V 4V 10V 10V 25V 6.3V 25V 16V 50V 25V
A-3016-981-A MAIN BOARD, COMPLETE ********************* 3-910-895-01 TERMINAL (), BATTERY 3-933-642-01 TERMINAL (+), BATTERY < CAPACITOR > C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C14 C15 C16 C17 C18 C19 C24 C101 C102 C103 C104 C105 C106 C201 C202 C203 C204 C205 C206 C301 C302 C303 C304 C305 C306 C307 1-163-083-00 1-163-099-00 1-163-101-00 1-163-089-00 1-163-117-00 1-163-003-11 1-164-005-11 1-163-038-91 1-163-038-91 1-163-038-91 1-163-117-00 1-163-117-00 1-126-153-11 1-163-078-11 1-163-063-91 1-126-154-11 1-163-037-11 1-163-037-11 1-164-234-11 1-163-007-11 1-126-153-11 1-163-019-00 1-164-234-11 1-163-117-00 1-163-009-11 1-163-007-11 1-126-153-11 1-163-019-00 1-164-234-11 1-163-117-00 1-163-009-11 1-164-505-11 1-126-153-11 1-163-038-91 1-163-038-91 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP 1PF 18PF 22PF 6PF 100PF 330PF 0.47uF 0.1uF 0.1uF 0.1uF 100PF 100PF 22uF 0.033uF 0.022uF 47uF 0.022uF 0.022uF 1uF 680PF 22uF 0.0068uF 1uF 100PF 0.001uF 680PF 22uF 0.0068uF 1uF 100PF 0.001uF 2.2uF 22uF 0.1uF 0.1uF 0.001uF 220uF 2.2uF
1-126-157-11 ELECT 1-163-038-91 CERAMIC CHIP 1-164-234-11 1-164-234-11 1-163-009-11 1-163-038-91 1-163-117-00 1-163-117-00 1-163-021-91 1-163-017-00 1-164-234-11 1-163-017-00 1-163-017-00 1-126-157-11 1-164-222-11 1-163-038-91 1-126-176-11 1-164-234-11 1-164-234-11 1-163-038-91 1-126-154-11 1-164-005-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP
10% 10% 10% 5% 5% 5%
0.0047uF 5% 10uF 20% 0.22uF 0.1uF 220uF 20% 1uF 1uF 0.1uF 47uF 0.47uF 2.2uF 0.01uF 0.47uF
5% 5% 20% 10% 10% 20% 10% 10% 10% 20% 10% 5% 10% 10% 20% 10% 5% 10% 20%
20%
1-164-505-11 CERAMIC CHIP 1-164-232-11 CERAMIC CHIP 1-164-005-11 CERAMIC CHIP < FILTER >
CF1 CF2
1-527-870-00 FILTER 1-578-672-71 FILTER, CRYSTAL < CONNECTOR >
CN301 CN401
1-569-252-21 HOUSING, CONNECTOR (FPC) 5P 1-565-289-11 HOUSING, CONNECTOR 7P < TRIMMER >
CT1
1-141-567-11 CAP, VAR (TUNING) < VARIABLE CAPACITOR >
CV1
1-141-567-11 CAP, VAR (TUNING) < IC >
1-163-009-11 CERAMIC CHIP 1-126-176-11 ELECT 1-164-505-11 CERAMIC CHIP
10% 20%
IC1 IC301
8-759-230-39 IC TA8122AF 8-759-497-06 MM1316AFBE
21
WM-PA1 MAIN
Ref. No. IC401
SWITCH
Part No. Description Remark Ref. No. R410 R411 R601 R602 R603 Part No. 1-216-001-00 1-216-097-91 1-217-905-11 1-216-298-00 Description METAL CHIP METAL GLAZE METAL GLAZE METAL CHIP 10 100K 1.5 2.2 560 5% 5% 5% 5% 5% Remark 1/10W 1/10W 1/10W 1/10W 1/10W 8-759-702-02 IC NJM062M < JACK >
J301 J302
1-750-061-11 JACK,DC(POLARITY UNIFIED TYPE)(DC IN 3V) 1-565-287-11 JACK (2) < JUMPER RESISTOR >
1-216-043-91 METAL GLAZE
< VARIABLE RESISTOR > 5% 5% 5% 1/10W 1/10W 1/10W RV301 RV601 1-225-578-11 RES, VAR, CARBON ( VOLUME) 1-225-252-11 RES, ADJ, CARBON 470 (TAPE SPEED) < SWITCH >
JC1 JC4 JC5
1-216-295-00 METAL CHIP 1-216-295-00 METAL CHIP 1-216-295-00 METAL CHIP < COIL >
0 0 0
L1 L2 L3 L4 L101 L201 L301
X-3371-847-1 1-460-120-11 1-403-696-11 1-406-408-11 1-500-245-11
ANTENNA SUB ASSY, FERRITE-ROD COIL (WITH CORE) COIL (WITH CORE) COIL (OSC) INDUCTOR
S302 S303 S304 S305
1-571-986-11 1-692-298-11 1-692-299-11 1-692-898-11
SWITCH, LEAF (MD POWER) SWITCH, SLIDE (LOCAL/DX, NORM/METAL) SWITCH, SLIDE (FM, AM, TAPE RADIO OFF) SWITCH, SLIDE (AVLS) < TRANSFORMER >
1-500-245-11 INDUCTOR 1-412-006-31 INDUCTOR CHIP 10uH < TRANSISTOR >
T1
1-404-949-11 TRANSFORMER, IF < THERMISTOR >
Q2 Q301 Q302 Q401 Q402 Q403
8-729-216-22 8-729-402-13 8-729-216-22 8-729-216-22 8-729-207-73
TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR
2SA1162-G XN1501 2SA1162-G 2SA1162-G RN2407
TH601 TH602
1-809-279-11 THERMISTOR, POSITIVE 1-810-764-11 THERMISTOR, POSITIVE < FILTER >
8-729-230-49 TRANSISTOR 2SC2712-YG < RESISTOR >
X1 1-577-091-11 OSCILLATOR, CRYSTAL X2 1-578-672-71 FILTER, CRYSTAL ************************************************************ * 1-667-779-11 SWITCH BOARD ************* 1-667-057-11 FLEXIBLE BOARD < SWITCH > S401 1-572-922-11 SWITCH, SLIDE (SPEAKER) ************************************************************ MISCELLANEOUS ************** 9 HP901 L1 M901 SP1 1-667-057-11 1-500-115-11 X-3371-847-1 1-698-353-11 1-505-794-11 FLEXIBLE BOARD HEAD, MAGNETIC (PLAYBACK) ANTENNA SUB ASSY, FERRITE-ROD MOTOR, DC (REEL, CAPSTAN) SPEAKER
R1 R2 R3 R4 R5 R6 R7 R101 R102 R201 R202 R301 R302 R304 R305 R306 R322 R401 R402 R403 R404 R405 R406 R407 R408 R409
1-216-009-00 1-216-081-00 1-216-077-00 1-216-077-00 1-216-037-00 1-216-065-00 1-216-065-00 1-216-006-11 1-216-077-00 1-216-006-11 1-216-077-00 1-216-089-91 1-216-073-00 1-216-308-00 1-216-081-00 1-216-073-00 1-216-097-91 1-216-097-91 1-216-097-91 1-216-113-00 1-216-049-91 1-216-057-00 1-216-049-91 1-216-057-00 1-216-089-91
METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL GLAZE METAL CHIP METAL GLAZE METAL CHIP METAL GLAZE METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL GLAZE METAL GLAZE METAL GLAZE METAL CHIP METAL CHIP METAL CHIP METAL GLAZE METAL CHIP METAL GLAZE
22 22K 15K 15K 330 4.7K 4.7K 16 15K 16 15K 47K 10K 4.7 22K 10K 100K 100K 100K 470K 1K 2.2K 1K 2.2K 47K 47K
5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5%
1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W
************************************************************ ACCESSORIES & PACKING MATERIALS ******************************** 3-861-236-21 MANUAL, INSTRUCTION (SPANISH, PORTUGUESE) 8-953-130-90 HEADPHONE MDR-E801//K SET X-3372-629-1 CLIP ASSY, BELT
1-216-089-91 METAL GLAZE
Sony Corporation
9-923-266-11
Personal A&V Products Company
22
97J027025-1 Printed in Singapore © 1997.10 Published by Quality Engineering Dept. (Shibaura)