SERVICE MANUAL
Contents
1. Amplifier Front Speaker L This subwoofer 1 i 2 1 Amplifier This subwoofer a OO eo i Front Speaker R Front Speaker L Front Speaker R This subwoofer 1 2 PHASE 120 POWER indicator POWER LEVEL Hooking Up the System Overview Use the INPUT jacks or the SPEAKER IN terminals of the subwoofer when you connect the amplifier If your amplifier has one of the following types of output jacks connect the INPUT jack and the amplifier s jack using the supplied audio connecting cord MONO OUT jack MIX OUT jack SUBWOOFER output jack s SUPER WOOFER output jack s If your amplifier does not have the above mentioned output jacks connect the speaker terminals of the amplifier to the SPEAKER IN terminals instead Before you get started Turn off the power of the amplifier and the subwoofer before making any connection Use the audio connecting cords that are supplied to the respective equipment If there are not enough audio connecting cords to make the necessary connections you need to purchase some optional audio connecting cords Besure to make connections firmly to avoid noise Connect the AC power cord from the subwoofer to a wall outlet You cannot connect the CENTER output jack for use with Dolby Pro Logic function to the subwoofer Bass sound is not output with some Dolby Pro Logic modes2. Connecting to an amplifier with a single set of speaker terminals If your amplifier is equipped with a single set of speaker terminals connect the subwoofer to the amplifier and then connect the front speakers to the subwoofer Hookups 1 Connect the subwoofer to the amplifier Connect the SPEAKER IN terminals of the subwoofer to the amplifier s speaker terminals with the speaker cords Be sure to connect both L and R channels 2 Connect the front speakers to the subwoofer Connect the speakers to the SPEAKER OUT terminals of the subwoofer Connecting to an amplifier with double A B sets of speaker terminals If your amplifier has double A B sets of speaker terminals connect both the subwoofer and the front speakers to the amplifier Hookups 1 Connect the front speakers to the amplifier Connect the speakers to your amplifier s SPEAKER A terminals 2 Connect the subwoofer to the amplifier Connect the SPEAKER IN terminals of the subwoofer to the amplifiers SPEAKER terminals using the supplied speaker cords When using the double A B sets of speakers make sure that you select the A B position with your amplifier Note When you are using SPEAKER A terminal front speaker only or when the power of the amplifier is turned off turn down the volume or turn off the power of the subwoofer Otherwise hum noise may be heard WH PHASE corr
3. follow ing safety check 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 LEAKAGE TEST 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 microampers 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 2 A battery operated AC milliammeter The Data Precision 245 digital multimeter is suitable for this job 3 Measuring the voltage drop across a resistor by means of a VOM or battery operated AC voltmeter The limit indica tion is 0 75 V so analog meters must have an accurate low voltage scale The Simpson 250 and Sanwa SH 63Trd are ex amples of a passive VOM that is suitable Nearly all battery operated digital multimeters that have a 2 V AC range are suit able See Fig A To Exposed Metal Parts on Set AC voltmeter ____ 0750 0 15 uF Earth Ground Fig A SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK A OR DOTTED LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION REPLACE THESE COMPONENTS WITH SONY PARTS WH
4. not supplied MAIN oa SA WM250 SECTION 3 EXPLODED VIEWS Color Indication of Appearance Parts Example KNOB BALANCE WHITE RED 1 Parts Color Cabinet s Color Accessories are given in the last of this parts list Abbreviation CND Canadian model MY Malaysia model SP Singapore model TW Taiwan model The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified Les composants identifi s par une marque A sont critiques pour la s curit Ne les remplacer que par une pi ce portant le num ro sp cifi supplied with 8 RV701 5 7 supplied with not supplied not supplied CONTROL board not SP901 not supplied 3 A not supplied SWITCH board Ref No Part No Description Remark Ref No Part No Description Remark 1 A 4713 812 A SPEAKER CABINET ASSY BLACK BLACK 8 4 235 677 01 SCREW 4X20 TYPE1 BVTP 1 A 4715 636 A SPEAKER CABINET ASSY WOOD WOOD A F901 1 532 463 51 FUSE T1AL 250V AEP UK SP MY 2 4 229 774 01 SCREW TAPPING HEXAGON SOCKET A F901 1 533 450 12 FUSE GLASS TUBE DIA 5 2 5A 125V 3 4 253 174 01 GRILLE FRAME US CND TW 4 3 905 609 31 SCREW TRANSISTOR SP901 1 825 004 13 SPEAKER 20cm WOOFER 1901 1 439 624 11 TRANSFORMER POWER AEP UK SP MY 5 3 703 244 00 BUSHING 2104 CORD A6 1 769 744 1
5. 01 1 215 891 11 METAL OXIDE 680 5 2W F A R402 1 215 891 11 METAL OXIDE 680 5 2W F A R403 1 219 153 11 FUSIBLE 10 5 1 4W F A R404 1 219 153 11 FUSIBLE 10 5 1 4W F R500 1 249 421 11 CARBON 2 2K 5 1 4W R501 1 249 429 11 CARBON 10K 5 1 4W R502 1 247 871 11 CARBON 47K 5 1 4W R503 1 247 879 11 CARBON 100K 5 1 4W R504 1 247 879 11 CARBON 100K 5 1 4W R505 1 247 863 11 CARBON 22K 5 1 4W R506 1 247 863 11 CARBON 22K 5 1 4W R507 1 247 847 11 CARBON 4 7K 5 1 4W R508 1 247 831 11 CARBON 1K 5 1 4W A R601 1 215 920 11 METAL OXIDE 3 3K 5 3aW F lt RELAY gt RY301 1 515 920 11 RELAY 24V The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified Les composants identifi s par une marque A sont critiques pour la s curit 1 remplacer que par une pi ce portant le num ro sp cifi 11 SA WM250 POWER TRANS SWITCH Ref No Part No Description Remark Ref No No Description Remark POWER TRANS BOARD ACCESSORIES 1 533 217 41 HOLDER FUSE 1 769 329 21 CORD CONNECTION PIN PIN AUDIO 1 769 433 23 CORD SPEAKER 2 5m lt CAPACITOR gt 1 770 019 11 ADAPTOR CONVERSION PLUG UK 4 235 237 01 FOOT BLACK WOOD AEP UK TW AC2 1 113 924 11 CERAMIC 0 0047uF 20 250 4 252 451 11 MANUAL INSTRUCTION ENGLISH FRENCH SPANISH US CND CONNECTOR 4
6. 04 1 131 702 11 FILM 0 68uF 5 50V R708 1 249 429 11 CARBON 10K 5 1 4W C705 1 136 157 00 FILM 0 022uF 5 50V C706 1 126 965 11 ELECT 22uF 20 50V lt VARIABLE RESISTOR gt lt CONNECTOR gt RV701 1 227 365 11 RES VAR CARBON 20KX2 CUT OFF FREQ CN101 1 779 179 11 CONNECTOR B5B XH A 5P SWITCH CN701 1 784 931 11 PIN CONNECTOR 5P 701 1 786 490 11 SWITCH SLIDE PHASE lt DIODE gt lt TERMINAL BOARD gt D201 8 719 991 33 DIODE 155133 77 0202 8 719 991 33 DIODE 1851331 77 TM101 1 537 922 11 TERMINAL BOARD SPEAKER 0204 8 719 991 33 DIODE 188133T 77 MAIN BOARD IC 10201 8 759 636 74 IC 5218 22 CAPACITOR gt 10701 8 759 636 74 IC 5218 22 C203 1 131 696 11 FILM 0 22uF 596 50V JACK C204 1 131 696 11 FILM 0 22uF 596 50V C205 1 126 964 11 ELECT 10uF 20 50 J101 1 815 025 11 JACK PIN 1P INPUT C206 1 126 964 11 ELECT 10uF 20 50 C209 1 128 813 11 CERAMIC 220PF 5 50V 10 Ref No Part No Description C210 1 126 964 11 ELECT 10uF 20 C211 1 128 813 11 CERAMIC 220PF 5 C301 1 128 813 11 CERAMIC 220PF 5 C302 1 126 964 11 ELECT 10uF 20 C303 1 104 658 11 ELECT 100uF 20 C304 1 126 968 11 ELECT 100uF 20 C305 1 126 968 11 ELECT 100uF 20 C306 1 126 964 11 ELECT 10uF 20 C307 1 126 967 11 ELECT 47uF 20 C308 1 126 964 11 ELECT 10uF 20 C309 1 136 165 00 FILM 0 1uF 5 C310 1 136 165 00 FILM 0 1uF 5 C311 1 162 199 31 CERAMIC 10PF 5 C312 1 128 813 11 CERAMIC 220PF 5 C313 1 128 813 1
7. 1 CERAMIC 220PF 5 C314 1 128 813 11 CERAMIC 220PF 5 C316 1 128 813 11 CERAMIC 220PF 5 C317 1 128 813 11 CERAMIC 220PF 5 C318 1 128 813 11 CERAMIC 220PF 5 C401 1 136 165 00 FILM 0 1uF 5 C402 1 136 165 00 FILM 0 1uF 5 C403 1 104 482 11 ELECT 4700uF 20 C404 1 104 482 11 ELECT 4700uF 20 C405 1 126 968 11 ELECT 100uF 20 C406 1 126 968 11 ELECT 100uF 20 C407 1 126 971 11 ELECT 470uF 20 C408 1 126 971 11 ELECT 470uF 20 C409 1 136 165 00 FILM 0 1uF 5 C410 1 136 165 00 FILM 0 1uF 5 C411 1 128 813 11 CERAMIC 220PF 5 C412 1 128 813 11 CERAMIC 220PF 5 C501 1 126 964 11 ELECT 20 C502 1 126 949 11 ELECT 220uF 20 C503 1 126 923 11 ELECT 220uF 20 C601 1 126 964 11 ELECT 10uF 20 CONNECTOR gt CN201 1 784 931 11 PIN CONNECTOR CN202 1 779 179 11 CONNECTOR B5B XH A 5P 0 204 1 564 704 11 PIN CONNECTOR SMALL TYPE 2P CN301 1 564 320 00 PIN CONNECTOR 3 96mm PITCH 2P CN402 1 785 104 11 PIN CONNECTOR 3 96mm PITCH 6P CNP111 1 691 765 11 PLUG MICRO CONNECTOR 3P DIODE gt D205 8 719 110 31 DIODE RD12ESB2 D206 8 719 110 31 DIODE RD12ESB2 D301 8 719 991 33 DIODE 1551337 77 0302 8 719 991 33 DIODE 188133T 77 D304 8 719 991 33 DIODE 188133T 77 D401 8 719 302 38 DIODE RBV 602 01 0402 6 500 522 11 DIODE 10EDB40 TA2B5 0403 6 500 522 11 DIODE 10EDB40 TA2B5 D501 8 719 991 33 DIODE 188133T 77 0502 8 719 991 33 DIODE 188133T 77 D602 8 719 991 33 DIODE 188133T 77 SA WM250 MAIN Remark Ref
8. 1 CORD POWER AEP UK SP MY 1901 1 439 625 11 TRANSFORMER POWER US CND TW 6 1 783 820 11 CORD POWER US CND 1 7 685 646 79 SCREW BVTP 3X8 TYPE2 IT 3 A6 1 827 597 41 CORD POWER TW 2 7 685 880 09 SCREW BVTT 4X6 S 7 4 999 482 81 KNOB VOL 3 7 685 647 79 SCREW BVTP 3X10 TYPE2 IT 3 SA WM250 CONTROL INPUT CONTROL MAIN 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 and X mean standardized parts so they may have some difference from the original one RESISTORS resistors are in ohms METAL Metal film resistor METAL OXIDE Metal oxide film resistor F nonflammable When indicating parts by reference number please include the board SECTION 4 ELECTRICAL PARTS LIST Items marked gt 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 u for example uA uPA uPA uPB uPB uPC uPC uPD uPD CAPACITORS uF uF COILS uH uH Abbreviation Canadian model MY Malaysia model TW Taiwan model The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified Les composants identifi s par une marque A sont critiq
9. 252 451 21 MANUAL INSTRUCTION ENGLISH FRENCH CN1 1 564 321 00 PIN CONNECTOR 3 96mm PITCH 2P GERMAN ITALIAN CN2 1 580 230 11 CONNECTOR PC BOARD 2P 4 sk sk e sk she le sk sh le oe 4 252 451 31 MANUAL INSTRUCTION DUTCH SPANISH SWEDISH POLISH SWITCH BOARD AEP 4 252 451 41 MANUAL INSTRUCTION PORTUGUESE DANISH FINNISH AEP CAPACITOR 4 252 451 51 MANUAL INSTRUCTION ENGLISH FRENCH SPANISH TRADITIONAL CHINESE AN C901 1 113 924 11 CERAMIC 0 0047uF 20 250 SP MY TW 4 981 864 01 FOOT WOOD SP MY lt CONNECTOR gt CN3 1 695 044 11 PIN CONNECTOR 3 96mm PITCH 2P CN901 1 564 718 11 PIN CONNECTOR SMALL TYPE 2P DIODE 0901 6 500 991 01 LED TLPGE62T SONY M F POWER SWITCH 5901 1 554 920 11 SWITCH PUSH AC POWER 1 KEY POWER sese se ofc se seo MISCELLANEOUS A6 1 769 744 11 CORD POWER AEP UK SP MY A6 1 783 820 11 CORD POWER US CND 6 1 827 597 41 CORD POWER TW AF901 1 532 463 51 FUSE T1AL 250V AEP UK SP MY AF901 1 533 450 12 FUSE GLASS TUBE DIA 5 2 5A 125V US CND TW SP901 1 825 004 13 SPEAKER 20cm WOOFER ANT901 1 439 624 11 TRANSFORMER POWER AEP UK SP MY ANT901 1 439 625 11 TRANSFORMER POWER US CND TW sk oko se oleo The components identified by Les composants identifi s par une mark or dotted line with ma
10. 6701 2 2 20k 20k L ave ENE gt 8 2 CUT OFF FREG OF T R204 172 1 1C701 E siw ATK MIX AMP LOW PASS FILTER 1C202 1 2 C703 703 mo E gig Y 5 Em 5 4 7k e 2 545 meses d eec 1 701 1 2 m 7 1C201 1 2 1 NuM4565DD R108 T 17 C203 C204 100k ET 9 0 22 0 22 w 3 7 4 GND 7 745 eno o R107 4 25V FILTER AMP 4 7k 9 2 I A7 sw 25v R109 9 100k R201 R202 Sa LL 47 8 1k 1 R210 ie T E i m mo 6201 Rte RP 220p 100k B lt lt 1 1C203 1 2 NJMASGSDD C801 M ETE a M 80 50 MA BOARD gt le le RV801 20k 9 1203 2 2 i e NJMASBSDD g 8 gt 2 12203 20 T FILTER J POWER AMP 9 0 9 9 9 9 9 9 R301 R506 LENA 2 7 2 3 8 2 22k 0505 oa obo 28C2785 PROTECTOR 0 2 R306 C313 qu Le 4 7k 220p t cave AM 4 C308 62 10 TERMINAL 50v R303 T sov J EARTH sl s R309 ERER EES 958 1 1802 7 220 0502 T 47k T 220p SWITCH 1881337 T wsot 1 14 1 2 c309 oim R311 D901 680 1W A TLPGE62T esto L POWER CN204 0 1 T 0304 LED sso 11991387 GND 4 m PENE 10 18
11. 81337 SPEAKER 50V R508 Ik 1 0401 RBV 802 01 Se R401 eno POWER TRANS BOARD ITCH 1 F901 0503 504 0502 2 5A 125V US Canadian TW BOARD OVERLOAD DETECT RELAY DRIVE 1 a720 HER E E 2 2 F901 Ti an CN2 0502 R503 R502 POWER o 2 c gt 1 34 2802784 100 a 901 i n 402 CNPA01 VTRANSFORMER C901 0504 0 7 100k C411 4700 POWER 24 5 23 8 23 8 D 220p eP ol ra 250V 1 0 8 SW 402 TERMINAL 23 7 0501 680 2W EARTH m 77 282785 R505 220 27 R501 500 p 22k 35v T oan 10k 2 2k e I CN1 amp PROTECTOR 9 9 C503 80 9 AC IN l 20 3T sov NOT REPLACEABLE BUILT IN TRANSFORMER SA WM250 SA WM250 2 7 IC BLOCK DIAGRAM IC301 STK404 130S MAIN Board The mechanical parts with no reference number in the exploded views are not supplied Items marked are not stocked since they are seldom required for routine service Some delay should be anticipated when ordering these items XX and X mean standardized parts so they may have some difference from the original one 3 1 MAIN SECTION not supplied INPUT CONTROL board not supplied POWER TRANS board not supplied
12. No Part No Description Remark 50V GROUND TERMINAL gt 50V 50V G1 1 537 738 21 TERMINAL GROUND 50V G2 1 537 738 21 TERMINAL GROUND 10V IC 50V 50V 10202 8 759 636 74 IC M5218AP 22 50V 10203 8 759 636 74 IC M5218AP 22 50V 10301 6 600 091 01 IC STK404 130S 50V TRANSISTOR 50V 50V Q501 8 729 119 78 TRANSISTOR 2SC2785 HFE 50V 0502 8 729 178 42 TRANSISTOR 2SC2784 F 50V Q503 8 729 119 78 TRANSISTOR 2SC2785 HFE 50V 0504 8 729 029 86 TRANSISTOR DTC124ESA Q505 8 729 119 78 TRANSISTOR 2SC2785 HFE 50V 50V RESISTOR 50V 50V R207 1 249 429 11 CARBON 10K 5 1 4W 50V R208 1 249 426 11 CARBON 5 6K 5 1 4W R210 1 247 871 11 CARBON 47K 5 1 4W 50V R211 1 247 863 11 CARBON 22K 5 1 4W 63V R215 1 249 429 11 CARBON 10K 5 1 4W 63V 50V R217 1 247 879 11 CARBON 100K 5 1 4W 50V R301 1 247 847 11 CARBON 4 7K 5 1 4W R302 1 247 871 11 CARBON 47K 5 1 4W 50V R303 1 249 413 11 CARBON 470 5 1 4W 50V A R304 1 215 886 11 METAL OXIDE 100 5 2W F 50V 50V R305 1 247 871 11 CARBON 47K 5 1 4W 50V R306 1 247 847 11 CARBON 4 7K 5 1 4W R307 1 247 847 11 CARBON 4 7K 5 1 4W 50V A R308 1 234 182 11 ENCAPSULATED COMPONENT 0 22X2 5W 50V R309 1 249 409 11 CARBON 220 5 1 4W 35V 10V R310 1 249 393 11 CARBON 10 5 1 4W 50V R311 1 215 868 00 METAL OXIDE 680 5 1W R312 1 247 863 11 CARBON 22K 5 1 4W R313 1 249 429 11 CARBON 10K 5 1 4W A R314 1 217 637 00 FUSIBLE 1 5 1 4 F R315 1 247 871 11 CARBON 47K 5 1 4W R317 1 249 393 11 CARBON 10 5 1 4W A R4
13. OSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY 2 TABLE OF CONTENTS 1 GENERAL Location of Controls rn tre deteriores 3 2 DIAGRAMS 2 1 Note for Printed Wiring Boards and Schematic Diagrams ce ier intere etienne recae 3 2 2 Circuit Boards Location essen 3 2 3 Printed Wiring Boards Main Section 4 2 4 Printed Wiring Board Input Control Section 5 2 5 Printed Wiring Boards Power Section 6 2 6 Schematic Diagram Main Section 7 2 1 Block nmm etre 8 3 EXPLODED VIEWS 35 Main Section 9 4 ELECTRICAL PARTS LIST 10 UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead free mark LF indicating the solder contains no lead Caution Some printed circuit boards may not come printed with the lead free mark due to their particular size LF LEAD FREE MARK Unleaded solder has the following characteristics Unleaded solder melts at a temperature about 40 higher than ordinary solder Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time Soldering irons using a temperature regulator should be set to about 350 C Caution The printed pattern cop
14. SERVICE MANUAL Ver 1 0 2004 03 SA WM250 SPECIFICATIONS AUDIO POWER SPECIFICATIONS Inputs POWER OUTPUT AND TOTAL HARMONIC Input jacks DISTORTION With 6 ohm loads from 28 200 Hz rated 100 watts Output jacks minimum RMS power with no more than 0 8 total General harmonic distortion from 250 milliwatts to rated output System Type Active Subwoofer magnetically shielded design Speaker unit Woofer 20 cm dia 8 in cone type RMS output 100 W 6 Ohms 40 Hz 10 THD Frequency range 28 Hz 200 Hz High frequency cut off frequency 50 Hz 200 Hz Phase selector NORMAL REVERSE 9 877 696 01 gt Sony Corporation 2004 04 1 Home Audio Company 2004 03 Published by Sony Engineering Corporation Power requirements US Model Canadian Model AEP Model UK Model E Model INPUT input pin jack SPEAKER IN input terminals SPEAKER OUT output terminals Taiwan models 110 V AC 50 Hz USA and Canada models 120 V AC 60 Hz Other models 230 V AC 50 60 Hz Power consumption 100W Dimensions Mass Approx 290 x 355 x 387 mm 11 3 8 x 14 x 15 1 4 in w h d 11 5 kg 25 Ib 6 oz Supplied accessories Foot pads 4 Audio connecting cord 1 phono 1 phono 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 ACTIVE SUBWOOFER SONY SA WM250 SAFETY CHECK OUT After correcting the original service problem perform the
15. gt REVERSE LL LIN O O O O J101 p Semiconductor Location Ref No Location SA WM250 2 5 PRINTED WIRING BOARDS POWER SECTION Refer to page 3 for Circuit Boards Location Uses unleaded solder 1 2 3 4 5 6 7 8 9 10 11 Page 4 MAIN BOARD A CN402 POWER TRANS BOARD B CNP401 Boon Page 4 12 D901 S901 POWER e OO IAN E NOT REPLACEABLE BUILT IN TRANSFOR MAIN BOARD Xo CN204 F SWITCH BOARD G SF ORMER 1 861 937 iw 1 861 935 m 13 14 2 6 SCHEMATIC DIAGRAM MAIN SECTION Refer to page 8 for IC Block Diagram H 1 16 AM 1 101 0102 SPEAKER 8 ab A P 2 55 AS T iN OUT 2101 48g LIMITER 701 8 2 16201 2 2 PHASE R103 NJMASBSDD RV701 NORMAL REVERSE LU 2 Sa 3 8 1
16. he setting that provides the sound you prefer when listening in your normal listening position Setting the speaker To prevent speaker vibration or movement while listening attach the supplied foot pads to the speaker THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS In addition to this the necessary note is printed in each block For schematic diagrams Note Note All capacitors are in uF unless otherwise noted pF uuF e o parts extracted from the component side 50 WV or less are not indicated except for electrolytics parts extracted from the conductor side and tantalums Pattern from the side which enables seeing All resistors are in Q and 4W or less unless otherwise Abbreviation specified CND Canadian model internal component MY Malaysia model panel designation SP Singapore model Note The components identi fied by mark or dotted line with mark are criti cal for safety Replace only with part number specified For printed wiring boards Note Les composants identifi s par une marque A sont critiques pour la s curit Ne les remplacer que par une pi ce portant le num ro sp cifi B Line B Line Voltages are dc with respect to ground under no signal detuned conditions no mark Power on Voltages are taken with a VOM Input impedance 10 Voltage variations may be n
17. liquid or solid object fall into the subwoofer unplug the subwoofer and have the subwoofer checked by qualified personnel before operating it any further AC power cord must be changed only at the qualified service shop When turning on or off an amplifier or other equipment Lower the volume of the amplifier to minimum To avoid damaging the subwoofer Be careful in setting the volume control of the amplifier to avoid an excessive input power Do not attempt to open the enclosure or remold speaker units and networks In case color irregularity is observed on the nearby TV screen With the magnetically shielded type of the speaker system the speakers can be installed near a TV set However color irregularity may still be observed on the TV screen depending on the type of your TV set If color irregularity is observed Turn off the TV set once then turn it on after 15 to 30 minutes If color irregularity is observed again Place the speakers further apart from the TV set When howling occurs Relocate the speaker or turn down the volume of the amplifier On installation Do not install the subwoofer near heat sources such as radiators or air ducts or in a place subject to direct sunlight excessive dust mechanical vibration or shock Good ventilation is essential to prevent internal heat build up in the subwoofer Place the subwoofer in a location with adequate air circulation Do not place the
18. oted due to normal produc tion tolerances Signal path gt AUDIO Abbreviation CND Canadian model MY Malaysia model SP Singapore model TW Taiwan model 2 2 CIRCUIT BOARDS LOCATION INPUT CONTROL board MAIN board CONTROL board POWER TRANS board SWITCH board SA WM250 2 3 PRINTED WIRING BOARDS MAIN SECTION Refer to page for Circuit Boards Location IF Uses unleaded solder Page 6 Page 6 Page 5 Page 5 POWER TRANS BOARD SWITCH BOARD INPUT CONTROL BOARD INPUT CONTROL BOARD CNP401 CN901 CN101 CN701 MAIN BOARD SPEAKER CHASSIS CHASSIS 7 1 861 934 Semiconductor Location s D F F C C C C B D D F B C B B F 54 NEO gt 5 5 CONTROL BOARD SA WM250 2 4 PRINTED WIRING BOARD INPUT CONTROL SECTION Refer to page 3 for Circuit Boards Location Uses unleaded solder Page 4 Page 4 MAIN BOARD MAIN BOARD A CN201 CN202 pr 27 U C Z 2 0 JU gt U N NETZE R204 N ownd Seu cus f SA ____ _ pm PA Cam LC D R109 RV701 3 D CUT OFF FRED San i 06 y m OW S701 CN T PHASE 1 861 936 11 F NORMAL
19. per foil may peel away if the heated tip is applied for too long so be careful Strong viscosity Unleaded solder is more viscous sticky less prone to flow than ordinary solder so use caution not to let solder bridges occur such as on IC pins etc Usable with ordinary solder Itis best to use only unleaded solder but unleaded solder may also be added to ordinary solder ATTENTION AU COMPOSANT AYANT RAPPORT A LA SECURITE LES COMPOSANTS IDENTIFI S PAR UNE MARQUE SUR LES DIAGRAMMES SCH MATIQUES ET LA LISTE DES PIECES SONT CRITIQUES POUR LA S CURIT DE FONCTIONNEMENT NE REMPLACER CES COMPOSANTS QUE PAR DES PIECES SONY DONT LES NUM ROS SONT DONN S DANS CE MANUEL OU DANS LES SUPPL MENTS PUBLI S PAR SONY SA WM250 SECTION 1 GENERAL SECTION 2 DIAGRAMS 2 1 NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS This section is extracted from instruction manual LOCATION OF CONTROL j INPUT SPEAKER IN Amplifier EET This subwoofer n Precautions On safety Before operating the subwoofer be sure that the operating voltage of your subwoofer is identical with that of your local power supply Unplug the subwoofer from the wall outlet if it is not to be used for an extended period of time To disconnect the cord pull the cord by grasping the plug Never pull the cord itself Should any
20. rea en Nue CUT OFF FREQ 100Hz Connecting to an amplifier with a special jack for a subwoofer If your amplifier has a special jack for a subwoofer such as MONO OUT jack MIX OUT jack SUBWOOFER jack or SUPER WOOFER jack connect the INPUT jack of the subwoofer to one of those jacks Hookups D Connect the MONO OUT jack of your amplifier to the INPUT jack of the subwoofer with the supplied audio connecting cord Note If the output level of your amplifier is not large enough the sound may not be loud enough In this case connect the speaker terminals of the amplifier directly to the SPEAKER IN terminals of the subwoofer Connecting the AC power cord Connect the AC power cord from the subwoofer and from your amplifier to a wall outlet Make sure that power to the subwoofer is turned off before you plug in or unplug any power cord tening to the Sound 1 Tumonthe amplifier and select the program source 2 Press POWER The subwoofer turns on and the POWER indicator lights up in green 3 Play the program source Adjust the VOLUME so that sound from the front speakers is not distorted If it is distorted the sound from the subwoofer will also be distorted Notes Never set the amplifier s tone control BASS TREBLE etc or the equalizer output to a high level or input sinewaves of 20 Hz to 50 Hz recorded on a commercially available test disc or special so
21. rk marque sont critiques pour are critical for safety la s curit 12 Replace only with part number Neles remplacer que par une pi ce specified portant le num ro sp cifi SA WM250 SA WM250 REVISION HISTORY Clicking the version allows you to jump to the revised page Also clicking the version at the upper on the revised page allows you to jump to the next revised page Description of Revision 2004 03 New
22. subwoofer on a soft surface Use caution when placing the speaker on a specially treated waxed oiled polished etc floor as staining or discoloration may result On cleaning the cabinet Clean the cabinet with a soft cloth lightly moistened with water Do not use any type of abrasive pad scouring powder or solvent such as alcohol or benzine If you have any questions or problems concerning your subwoofer that is not covered in this manual please consult your nearest Sony dealer Installation Since the human ear cannot detect the direction and position where the bass sound being reproduced by a subwoofer below 200 Hz comes from you can install the subwoofer wherever you like in your room To obtain a better bass reproduction we recommend you to install the subwoofer on a solid floor where the resonance is unlikely to occur Notes Always install the subwoofer vertically keeping a few centimeters away from the wall Do not place an object on the subwoofer or sit on it If the subwoofer is installed in the center of a room the bass could be extremely weakened This is due to the influence of the standing wave of the room If this happens move the subwoofer away from the center of room or eliminate the cause of the standing wave by installing a bookshelf on the wall etc
23. ues pour la s curit Ne les remplacer que par une pi ce portant le num ro sp cifi SP Singapore model Ref No Part No Description Remark Ref No Part No Description Remark CONTROL BOARD lt RESISTOR gt R101 1 260 107 11 CARBON 4 7K 5 1 2W lt CAPACITOR gt R102 1 247 879 11 CARBON 100K 5 1 4W R103 1 247 879 11 CARBON 100K 5 1 4W C801 1 126 964 11 ELECT 10uF 20 50 R104 1 247 847 11 CARBON 4 7K 5 1 4W R105 1 247 847 11 CARBON 4 7K 5 1 4W lt CONNECTOR gt R106 1 247 847 11 CARBON 4 7K 5 1 4W CNP801 1 691 765 11 PLUG MICRO CONNECTOR 3P R107 1 260 107 11 CARBON 4 7K 5 1 2W R108 1 247 879 11 CARBON 100K 5 1 4W lt VARIABLE RESISTOR gt R109 1 247 879 11 CARBON 100K 5 1 4W R110 1 247 879 11 CARBON 100K 5 1 4W RV801 1 227 511 11 RES VAR CARBON 20K LEVEL 8202 1 247 831 11 CARBON 1K 5 1 4W INPUT CONTROL BOARD R203 1 247 847 11 CARBON 4 7K 5 1 4W Soo ooo ooo R204 1 247 847 11 CARBON 4 7K 5 1 4W R701 1 247 847 11 CARBON 4 7K 5 1 4W lt CAPACITOR gt R702 1 249 429 11 CARBON 10K 5 1 4W C101 1 128 813 11 CERAMIC 220PF 5 50V R703 1 249 428 11 CARBON 8 2K 5 1 4W C201 1 126 964 11 ELECT 10uF 20 50 R704 1 249 428 11 CARBON 8 2K 5 1 4W C701 1 126 947 11 ELECT 47uF 20 35 R705 1 247 879 11 CARBON 100K 5 1 4W C702 1 126 947 11 ELECT 47uF 20 35 R706 1 247 847 11 CARBON 4 7K 596 1 4W C703 1 126 963 11 ELECT 4 7uF 20 50 R707 1 249 429 11 CARBON 10K 5 1 4W C7
24. und bass sound of electronic musical instrument pop noise of analog disc turntable sound with abnormally enhanced bass etc in a high level to this unit These actions may cause damage to the speakers When a special disc containing abnormally enhanced bass is played noise may be output in addition to the original sound In such a case reduce the sound level The subwoofer output signal DOLBY digital signal of the digital surround processor sold singularly is set 10 dB higher by Dolby laboratories Licensing Corporation In the case of using normally adjust the subwoofer level Foot pads Adjusting the Sound You can adjust the sound of the subwoofer to suit the sound of your front speakers Reinforcing the bass sound gives you a greater sense of atmosphere 1 Adjust the cut off frequency Turn the CUT OFF FREQ control depending on the reproduction frequencies of your front speakers Refer to the following when adjusting Typical very small sized speakers 5 7 cm dia 2 Typical small sized speakers 8 15 cm dia 3 Typical medium sized speakers 16 24 cm dia 3 Typical large sized speakers more than 25 cm dia To make the most of the low level converter function of Dolby digital turn the CUT OFF FREQ as high as possible when playing back the Dolby digital 2 Adjust the volume level of the subwoofer Turn the LEVEL control so that you can hear the bass so
25. und a little more than before To increase the volume turn the LEVEL control clockwise To reduce the volume turn the LEVEL control counterclockwise 3 Play your favorite song and movie Male vocal tunes and voice containing bass sounds are most suitable for adjustment Turn the volume for front speakers to the same level as usual 4 Select the phase polarity Use the PHASE selector to select the phase polarity 5 Repeat steps 1 to 4 to adjust for your preference Once you have adjusted the subwoofer to the settings you want use the VOLUME control on the amplifier to adjust the volume of the subwoofer with that of the other speakers You don t need to adjust the subwoofer settings when you change the volume level of the amplifier Notes If the sound distorts when you turn on the bass reinforcement from your amplifier such as DBFB GROOVE the graphic equalizer etc turn off the bass reinforcement and adjust the sound Do not turn the volume of the subwoofer to maximum Doing so may weaken the bass sound Moreover extraneous noise may be heard Selecting NORMAL or REVERSE with the PHASE selector reverses the polarity and may provide better bass reproduction in certain listening environments depending on the type of front speakers the position of the subwoofer and the adjustment of the cut off frequency It may also change the expanse and tightness of sound and effect the feeling of the sound field Select t
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