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SA-WM20
SERVICE MANUAL
Ver.1.0 2001.1
US Model Canadian Model AEP Model UK Model E Model
SPECIFICATION
System Type
Active Subwoofer (magnetically shielded design)
General Power requirements
Canadian model: 120 V AC, 60 Hz European model: 230 V AC, 50/60 Hz
Speaker unit
Woofer: 20 cm dia. (8 in.), cone type
Power consumption
50 W
Amplifiersection
Continuous RMS output : Canadian model (0.8%) 50W European model (DIN) 50 W Other models (0.8%) 50 W
Dimensions
Approx. 270 x 325 x 385 mm (10 3/ 4 x 12 7/ 8 x 15 1/ 4 in.) (w/h/d)
Mass
10 kg (22 lb 1oz)
Reproduction frequency range
28 Hz 200 Hz
Supplied accessories
Foot pads (4) Audio connecting cord (1 phono plug 1 phono plug), 2 m (6 ft 6 1/ 2 in.) (1) Speaker cords, 2.5 m (8 ft 2 1/ 2 in.) (2) Design and specifications are subject to change without notice.
High frequency cut-off frequency
50 Hz 200 Hz
Phase selector
NORMAL, REVERSE
Inputs Input jacks
LINE IN: input pin jack SPEAKER IN: input terminals
Output jacks
SPEAKER OUT: output terminals
ACTIVE SUBWOOFER
9-873-806-11
2001A0900-1 © 2001. 1
Sony Corporation
Audio Entertainment Group General Engineering Dept.
1
SA-WM20
SAFETY CHECK-OUT
(US model)
After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.
TABLE OF CONTENTS 1. GENERAL .......................................................................... 3 2. DIAGRAMS
2-1. Circuit Boards Location ........................................................ 3 2-2. Printed Wiring Board ............................................................ 4 2-3. Schematic Diagram ............................................................... 5
LEAKAGE
The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instruments. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)
3. EXPLODED VIEW
3-1. Front Section ......................................................................... 6 3-2. Amp Section ......................................................................... 6
4. ELECTRICAL PARTS LIST ......................................... 7
2.
3.
To Exposed Metal Parts on Set
0.15µF
1.5k
AC voltmeter (0.75V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
2
SA-WM20 SECTION 1 GENERAL
· Location of controls Front view (a part)
SECTION 2 DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) For printed wiring boards.
Note: · X : parts extracted from the component side. · Y : parts extracted from the conductor side. · b : Pattern from the side which enables seeing.
For schematic diagrams.
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. · C : panel designation. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Note: Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce por tant le numéro spécifié.
1
2
3
4
5
1 POWER (@/1) button 2 POWER indicator 3 PHASE (4 NORMAL/$ REVERSE) button 4 CUT OFF FREQ dial 5 LEVEL dial
· : B+ Line. · : B Line. · Voltages are dc with respect to ground under no-signal conditions. no mark : Power on : Impossible to measure · Voltages are taken with a VOM (Input impedance 10M). Voltage variations may be noted due to normal preduction tolerances. · Signal path. K : AUDIO · Abbreviation CND : Canadian model SP : Singapore model MX : Mexican model MY : Malaysia model
2-1. Circuit Boards Location
POWER IC board LED board
SWITCH board MAIN board
CONTROL board
3
3
SA-WM20
2-2. PRINTED WIRING BOARD · See page 3 for Circuit Boards Location.
· Semiconductor Location
Ref. No. D101 D102 D103 D104 D301 D302 D303 D304 D401 D402 D403 D404 IC101 IC102 Q301 Q302 Q303 Q304 Q401 Location A-2 A-2 A-2 A-2 B-3 B-3 C-5 A-6 A-7 A-6 A-4 A-4 B-1 A-3 C-4 C-4 C-5 C-4 B-1
There are a few cases that the part isn't mounted in model is printed on diagram.
4
4
SA-WM20
2-3. SCHEMATIC DIAGRAM
5
5
SA-WM20 SENTION 3 EXPLODED VIEWS
NOTE: · -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 · 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 the electrical parts list. · Abbreviation CND : Canadian model SP : Singapore model MX : Mexican model MY : Malaysia model The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
3-2. AMP SECTION
57 56
not supplied not supplied
54 54 57 54 60
3-1. FRONT SECTION
55
7
not supplied
6 7 12 9 8
not supplied
54
10
54
53 59 60 57 63
58
5 6 4 7 12
not supplied
62
T1 F1
51
3 2
61 54
F2
52
11 1
11
SP101 Ref. No. 51 52 52 Ref. No. 1 1 2 2 3 4 4 5 Part No. Description Remark Ref. No. 6 6 Part No. Description Remark * 53 54 55 56 56 56 57 58 58 58 X-4953-516-1 FRAME (BLACK) ASSY, GRILLE (E,US,MX,CA,AEP,UK,MY,SP) X-4953-686-1 FRAME (GRAY) ASSY, GRILLE (E,US,AEP,MY,SP) 4-232-524-01 PANEL, FRONT (SILVER)(E,US,AEP,MY,SP) 4-232-524-11 PANEL, FRONT (BLACK) (E,US,MX,CA,AEP,UK,MY,SP) 1-680-714-12 PWB, CONTROL 4-232-527-01 KNOB, VOLUME (SILVER)(E,US,AEP,MY,SP) 4-232-527-11 KNOB, VOLUME (BLACK) (E,US,MX,CA,AEP,UK,MY,SP) 4-232-531-01 PLATE, LIGHT GUIDE 4-973-938-81 KNOB (A), PUSH (SILVER)(E,US,AEP,MY,SP) 4-973-938-91 KNOB (A), PUSH (BLACK) (E,US,MX,CA,AEP,UK,MY,SP) 7-685-649-79 1-680-715-12 1-680-716-12 4-232-534-01 4-914-430-11 SCREW +BVTP 3X14 TYPE2 IT-3 PWB, SWICH PWB, LED PACKING (DUCT) SCREW (4X20), TAPPING Part No. Description Remark 1-680-713-12 PWB, MAIN A-4412-797-A CABINET ASSY(SILVER) (E,US,AEP,MY,SP) A-4412-798-A CABINET ASSY(BLACK) (E,US,MX,CA,AEP,UK,MY,SP) 3-703-150-11 CLAMP (E,AEP,UK,MY,SP) 7-685-649-79 SCREW +BVTP 3X14 TYPE2 IT-3 1-680-717-12 4-234-079-11 4-234-079-41 4-234-079-51 4-914-518-11 PWB, POWER IC PANEL, REAR (US,MX,CA) PANEL, REAR (AEP,UK,MY,SP) PANEL, REAR (E) SCREW (4X14), (+) (B) TAPPING Ref. No. * 59 60 61 62 63 0 F1 0 F1 0 F1 0 F2 0 T1 0 T1 0 T1 Part No. Description 3-703-244-00 BUSHING (2104), CORD 7-685-660-19 SCREW +BVTP 4X10 TYPE2 N-S 3-701-946-21 4-234-637-01 4-956-370-02 1-532-500-31 1-532-502-31 Remark
LABEL, FUSE RATING CUSHION (TRANSFORMER) BAND, PLUG FIXED (UK) FUSE (T630mAL/250V)(AEP,UK,MY,SP) FUSE (T1.25AL/250V)(E)
7 8 9 10 11 12 SP101
7-685-646-79 SCREW +BVTP 3X8 TYPE2 N-S 1-529-995-11 SPEAKER (20CM)
1-777-071-11 CORD, POWER (AEP,UK) 1-783-525-11 CORD, POWER (TRACKING) (E) 1-783-820-11 CORD, POWER (US,MX,CA,MY,SP)
1-532-742-11 FUSE, GLASS CYLINDRICAL(DIA.5) (1.6A/125V)(US,MX,CA) 1-532-499-31 FUSE (T400mAL/250V)(E) 1-435-879-11 TRANSFORMER, POWER (US,MX,CA) 1-435-880-11 TRANSFORMER, POWER (AEP,UK,MY,SP) 1-435-881-11 TRANSFORMER, POWER (E)
6
6
SA-WM20 SECTION 4 ELECTRICAL PARTS LIST CONTROL
NOTE: Ref. No. Part No. Description · 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. · Items marked "*" are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. · CAPACITORS: uF: µF · RESISTORS All resistors are in ohms. METAL: metal-film resistor METAL OXIDE: Metal Oxide-film resistor F: nonflammable Ref. No. Part No. Description Remarks Ref. No. COILS uH: µH · SEMICONDUCTORS In each case, u: µ, for example: uA...: µA... , uPA... , µPA... , uPB... , µPB... , uPC... , µPC... , uPD..., µPD... · Abbreviation CND : Canadian model SP : Singapore model MX : Mexican model MY : Malaysia model · Part No. Description
LED
MAIN
Remarks
When indicating parts by reference number, please include the board name.
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
Remarks
Ref. No.
Part No.
Description
Remarks
1-680-714-12 PWB, CONTROL ************* C203 C204 C205 C207 C208 C209 C210 C211 1-136-173-00 1-136-165-00 1-126-963-11 1-126-963-11 1-104-664-11 MYLAR MYLAR ELECT ELECT ELECT 0.47uF 0.1uF 4.7uF 4.7uF 47uF 47uF 22uF 22uF 5.00% 5.00% 20.00% 20.00% 20.00% 50V 50V 50V 50V 25V * CN203
1-680-716-12PWB, LED ******** 1-564-517-11 PLUG, CONNECTOR 2P D201 8-719-058-03 DIODE SEL5423E-TP15 ************************************************************* 1-680-713-12 PWB, MAIN ********** 0 C2 C101 C103 C104 C301 C303 C304 C305 C306 C307 C308 C309 C310 C311 C312 C320 C401 C402 C403 C404 C405 C406 1-113-924-11 1-126-964-11 1-136-165-00 1-136-165-00 1-136-165-00 1-126-933-11 1-136-153-00 1-126-967-11 1-126-967-11 1-136-169-00 1-136-169-00 1-126-934-11 1-126-949-11 1-126-963-11 1-126-964-11 1-102-110-00 1-136-165-00 1-136-165-00 1-126-974-11 1-126-974-11 CERAMIC ELECT MYLAR MYLAR MYLAR ELECT FILM ELECT ELECT MYLAR MYLAR ELECT ELECT ELECT ELECT CERAMIC MYLAR MYLAR ELECT ELECT 0.0047uF 10uF 0.1uF 0.1uF 0.1uF 100uF 0.01uF 47uF 47uF 0.22uF 0.22uF 220uF 220uF 4.7uF 10uF 0.00022uF 0.1uF 0.1uF 3300uF 3300uF 100uF 100uF 20.00% 20.00% 5.00% 5.00% 5.00% 20.00% 5% 20.00% 20.00% 5.00% 5.00% 20.00% 20.00% 20.00% 20.00% 10.00% 5.00% 5.00% 20.00% 20.00% 250V 50V 50V 50V 50V 16V 50V 50V 50V 50V 50V 10V 35V 50V 50V 50V 50V 50V 50V 50V
1-104-664-11 ELECT 1-126-965-11 ELECT 1-126-965-11 ELECT
20.00% 25V 20.00% 50V 20.00% 50V
CN201
1-785-093-11 PIN, CONNECTOR 8P
IC201 IC202
8-759-634-50 IC M5218AL 8-759-634-50 IC M5218AL
R201 R202 R203 R204 R205 R206 R207 R208 R209 R214 R215
1-249-425-11 1-249-429-11 1-249-425-11 1-249-425-11 1-249-429-11 1-249-429-11 1-249-429-11 1-249-441-11 1-247-807-31 1-247-887-00
CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON
4.7K 10K 4.7K 4.7K 10K 10K 10K 100K 100 220K 4.7K
5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5%
1/4W F 1/4W 1/4W F 1/4W F 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W F
1-249-425-11 CARBON
RV201 RV202 1-227-365-11 RES, VAR 20K/20K 1-227-364-11 RES, VAR 20K S201 1-554-522-00 SWITCH, PUSH (1 KEY) ************************************************************* CN1 * CN2 CN101 * CN301 1-564-321-00 1-580-230-11 1-785-093-11 1-565-792-11 PIN, CONNECTOR 2P PIN, CONNECTOR (PC BOARD) 2P PIN, CONNECTOR 8P PIN, CONNECTOR 2P D101 D102 8-719-991-33 DIODE 1SS133T-77 8-719-991-33 DIODE 1SS133T-77 1-104-665-11 ELECT 1-104-665-11 ELECT 20.00% 25V 20.00% 25V
7
SA-WM20 MAIN
Ref. No. D103 D104 D301 D302 D303 D304 D401 D402 D403 D404
SWITCH
Part No. 8-719-991-33 8-719-991-33 8-719-991-33 8-719-991-33 8-719-991-33 8-719-991-33 8-719-500-56 8-719-991-33 8-719-947-61 8-719-947-61 Description DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE
POWER IC
Remarks Ref. No. R308 1SS133T-77 1SS133T-77 1SS133T-77 1SS133T-77 1SS133T-77 1SS133T-77 D3SBA20 1SS133T-77 MTZJ-T-72-15B MTZJ-T-72-15B R309 R310 R311 R312 R313 R314 R401 R402 R405 R406 Part No. Description 680 22K 22K 100K 100K 47K 12K 1K 1K 10K 2.2K 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% Remarks 1W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 2W 2W 1/4W 2W 1-215-868-00 METAL OXIDE 1-249-433-11 1-249-433-11 1-249-441-11 1-249-441-11 1-249-437-11 1-249-430-11 1-215-892-11 1-215-892-11 1-249-429-11 1-215-894-11 CARBON CARBON CARBON CARBON CARBON CARBON METAL OXIDE METAL OXIDE CARBON METAL OXIDE
0 F1 0 F1 0 F1 0 F2 1-532-500-31 FUSE (T630mAL/250V)(AEP,UK,MY,SP) 1-532-502-31 FUSE (T1.25AL/250V)(E) 1-532-742-11 FUSE, GLASS CYLINDRICAL (DIA.5) (1.6A/125V)(US,MX,CA) 1-532-499-31 FUSE (T400mAL/250V)(E) IC101 IC102 8-759-634-50 IC M5218AL 8-759-634-50 IC M5218AL J103 J103 1-770-377-31 JACK, PIN 1P (LINE)(E) 1-793-446-11 JACK, PIN 1P (LINE)(US,MX,CA,AEP,UK,MY,SP) 0 C1 Q301 Q302 Q303 Q304 Q401 8-729-029-86 8-729-119-78 8-729-178-42 8-729-119-78 8-729-029-66 TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR R101 R102 R103 R105 R106 R107 R109 R110 R111 R114 R115 R116 R117 R118 R120 R121 R122 R123 R301 R302 R303 R304 R305 R307 1-249-441-11 1-249-441-11 1-249-425-11 1-249-441-11 1-249-441-11 1-249-425-11 1-249-425-11 1-249-441-11 1-249-429-11 1-247-887-00 1-249-441-11 1-249-429-11 1-247-895-00 1-249-425-11 1-249-425-11 1-249-425-11 1-249-425-11 1-249-425-11 1-249-425-11 1-249-433-11 1-249-411-11 1-249-433-11 1-249-435-11 1-249-385-11 CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON 100K 100K 4.7K 100K 100K 4.7K 4.7K 100K 10K 220K 100K 10K 470K 4.7K 4.7K 4.7K 4.7K 4.7K 4.7K 22K 330 22K 33K 2.2 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 1/4W 1/4W 1/4W F 1/4W 1/4W 1/4W F 1/4W F 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W F 1/4W F 1/4W 1/4W 1/4W 1/4W 1/4W F F F F 0 S1 1-554-920-11 SWITCH, PUSH (AC POWER)(1 KEY)(@/1) ************************************************************* 1-680-717-12 PWB, POWER IC ************** C302 1-162-286-31 CERAMIC CN303 1-785-088-11 PIN, CONNECTOR 6P IC301 8-759-299-54 IC LM3886TF R306 1-249-435-11 CARBON 33K 5% 1/4W ************************************************************* 220PF 10% 50V DTC124ESA 2SC2785-HFE 2SC2784-F 2SC2785-HFE DTC114ESA 1-113-924-11 CERAMIC * CN3 1-564-321-11 PIN, CONNECTOR 2P 0.0047uF 20.00% 250V 1-680-715-12 PWB, SWITCH ************ TM101 1-537-922-11 TERMINAL BOARD (SPEAKER) *************************************************************
RY301
1-515-920-11 RELAY (24V)
0 S2
1-762-953-11 SWITCH, POWER (VOLTAGE SELECTOR)(E)
1/4W 1/4W 1/4W 1/6W F
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.
Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
8
SA-WM20
Ref. No.
Part No.
Description MISCELLANEOUS **************
Remarks
Ref. No.
Part No.
Description
Remarks
0 T1 1-435-879-11 TRANSFORMER, POWER (US,MX,CA) 0 T1 1-435-880-11 TRANSFORMER, POWER (AEP,UK,MY,SP) 0 T1 1-435-881-11 TRANSFORMER, POWER (E) ************************************************************* ACCESSORIES & PACKING MATERIALS ******************************* ADAPTOR, CONVERSION PLUG 3P (UK) CORD, CONNECTION (PIN-PIN) CORD, SPEAKER MANUAL, INSTRUCTION (ENGLISH,FRENCH)(US,CND,UK) 4-233-869-21 MANUAL, INSTRUCTION (ENGLISH,FRENCH,GERMAN,ITALIAN)(AEP) 4-233-869-31 MANUAL, INSTRUCTION (DUTCH,SPANISH,SWEDISH,POLISH)(AEP) 4-233-869-41 MANUAL, INSTRUCTION (PORTUGUESE,DANISH,FINNISH,RUSSIAN) (AEP) 4-233-869-51 MANUAL, INSTRUCTION (ENGLISH,FRENCH,SPANISH,CHINESE) (E,MX,MY,SP) 4-235-237-01 FOOT 1-770-019-11 1-769-329-21 1-769-433-21 4-233-869-11
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.
Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.
9
SA-WM20
Ref. No. Part No. Description REVISION HISTORY
Remarks
Ref. No.
Part No.
Description
Remarks
Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. 1.0 Date 2001.01 New Description of Revision
10