Sony SA-WM250 Service Manual
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Sony SA-WM250 Service Manual

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SERVICE MANUAL
Ver 1.0 2004.03
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 6 ohm loads, from 28 – 200 Hz; rated 100 watts,
minimum RMS power, with no more than 0.8 % total
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
Sony Corporation
9-877-696-01
2004C04-1
Home Audio Company
© 2004.03
Published by Sony Engineering Corporation
SA-WM250
SPECIFICATIONS
Inputs
Input jacks
Output jacks
General
Power requirements
Power consumption
Dimensions
Mass
Supplied accessories
Design and specifications are subject to change without notice.
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
100 W
Approx. 290 × 355 × 387 mm
(11
× 14 × 15
in.) (w/h/d)
3/8
1/4
11.5 kg (25 lb 6 oz)
Foot pads (4)
Audio connecting cord (1 phono – 1 phono),
2 m (6 ft 6
in.) (1)
1/2
Speaker cords, 2.5 m (8 ft 2
in.) (2)
1/2
ACTIVE SUBWOOFER
1

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  • Page 1 50 Hz – 200 Hz Speaker cords, 2.5 m (8 ft 2 in.) (2) Phase selector NORMAL, REVERSE Design and specifications are subject to change without notice. ACTIVE SUBWOOFER Sony Corporation 9-877-696-01 2004C04-1 Home Audio Company © 2004.03 Published by Sony Engineering Corporation...

  • Page 2: Table Of Contents

    CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU IN SUPPLEMENTS PUBLISHED BY SONY.

  • Page 3: General

    Sony dealer. • Do not turn the volume of the subwoofer to maximum. Hookups Doing so may weaken the bass sound. Moreover, extraneous noise may be heard.

  • Page 4: Printed Wiring Boards - Main Section

    SA-WM250 2-3. PRINTED WIRING BOARDS — MAIN SECTION — • Refer to page 3 for Circuit Boards Location. : Uses unleaded solder. (Page 6) (Page 6) (Page 5) (Page 5) RV801 C801 CNP801 • Semiconductor Location Ref. No. Location D205...

  • Page 5: Printed Wiring Board - Input Control Section

    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) • Semiconductor Location Ref. No. Location D201 C-12 D202 C-12 D203 C-11 D204...

  • Page 6: Printed Wiring Boards - Power Section

    SA-WM250 2-5. PRINTED WIRING BOARDS — POWER SECTION — • Refer to page 3 for Circuit Boards Location. : Uses unleaded solder. (Page 4) CNP401 (Page 4) FH951 F901 S901 D901 FH901...

  • Page 7: Schematic Diagram - Main Section

    SA-WM250 2-6. SCHEMATIC DIAGRAM — MAIN SECTION — • Refer to page 8 for IC Block Diagram. R102 TM101 R101 R104 S701 IC201(2/2) R103 RV701 IC701(2/2) R105 R204 R208 CN101 CN202 CN201 CN701 IC202(1/2) C703 R703 R704 R203 IC202(2/2) R106...

  • Page 8: Ic Block Diagram

    SA-WM250 2-7. IC BLOCK DIAGRAM IC301 STK404-130S (MAIN Board) 11 12...

  • Page 9: Exploded Views

    SA-WM250 SECTION 3 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • Color Indication of Appearance Parts The components identified by mark 0 or dotted line with mark number in the exploded views are not supplied. Example : 0 are critical for safety.

  • Page 10: Electrical Parts List

    SA-WM250 SECTION 4 CONTROL ELECTRICAL PARTS LIST INPUT CONTROL MAIN NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by mark 0 or dotted line with mark the parts list may be different from the they are seldom required for routine service.
  • Page 11 SA-WM250 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C210 1-126-964-11 ELECT 10uF < GROUND TERMINAL > C211 1-128-813-11 CERAMIC 220PF C301 1-128-813-11 CERAMIC 220PF 1-537-738-21 TERMINAL, GROUND C302 1-126-964-11 ELECT 10uF 1-537-738-21 TERMINAL, GROUND...
  • Page 12 * CN3 1-695-044-11 PIN, CONNECTOR (3.96mm PITCH) 2P CN901 1-564-718-11 PIN, CONNECTOR (SMALL TYPE) 2P < DIODE > 0 D901 6-500-991-01 LED TLPGE62T(SONY-M.F) (POWER) < SWITCH > 0 S901 1-554-920-11 SWITCH, PUSH (AC POWER) (1 KEY) (POWER) ************************************************************* MISCELLANEOUS ***************...
  • Page 13 SA-WM250 MEMO...
  • Page 14 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. Ver. Date Description of Revision 2004.03...

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