Sony SA-WP785 Service Manual
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Sony SA-WP785 Service Manual

Sony SA-WP785 Service Manual

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SERVICE MANUAL
Ver. 1.0 2007.04
• SA-WP785 is the sub woofer section
in HT-DDW785.
Sony Corporation
9-887-652-01
Home Audio Division
2007D16-1
Published by Sony Techno Create Corporation
© 2007.04
SA-WP785
SPECIFICATIONS
Speaker system
Active subwoofer,
magnetically shielded
Speaker unit
200 mm cone type
Enclosure type
Acoustically loaded bass
reflex
RMS output
190 W
Input
LINE IN (input pin jacks)
Power requirements
Area code
Power requirements
AUS
240 V AC, 50Hz
SP
230 – 240 V AC, 50/60 Hz
Power consumption 80 W
Dimensions (w/h/d) (Approx.)
270 × 330 × 373 mm
including front panel
Mass (Approx.)
8.3 kg
Design and specifications are subject to
change without notice.
•
Abbreviation
AUS : Australian model
SP
: Singapore model
E Model
Australian Model
ACTIVE SUBWOOFER

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  • Page 1 SA-WP785 SERVICE MANUAL E Model Australian Model Ver. 1.0 2007.04 • SA-WP785 is the sub woofer section in HT-DDW785. SPECIFICATIONS Speaker system Active subwoofer, magnetically shielded Speaker unit 200 mm cone type Enclosure type Acoustically loaded bass reflex RMS output...

  • Page 2: Unleaded Solder

    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.
  • Page 3 SA-WP785 SECTION 1 DIAGRAMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) Note on Printed Wiring Boards: Note on Schematic Diagrams: • All capacitors are in µF unless otherwise noted. (p: pF) 50 •...

  • Page 4: Main Board

    SA-WP785 • IC Block Diagrams – MAIN Board – IC202, IC203 NJM4565D 8 V+ A OUTPUT 7 B OUTPUT A -INPUT 6 B -INPUT A +INPUT 5 B +INPUT IC500 uPC1237C-A SWITCH FOR OVERLOAD LATCH/AUTOMATIC DETECTOR RESET OUTPUT AC-OFF OFFSET...

  • Page 5: Block Diagram

    SA-WP785 1-1. BLOCK DIAGRAM J101 IC202 (1/2) IC202 (2/2) (AUDIO IN) BUFFER RV801 (VOL) Q301, Q311 IC203 (1/2) CURRENT REGULATOR RY301 RELAY IC203 (2/2) Q302, Q304 Q307 - Q310 PRE DRIVE (SPEAKER) Q303, Q305 Q731 CURRENT MIRROR SWITCH Q102 +V REG...

  • Page 6: Printed Wiring Boards - Main Section

    SA-WP785 • See page 3 for Circuit Boards Location. 1-2. PRINTED WIRING BOARDS — MAIN SECTION — • :Uses unleaded solder. MAIN BOARD • Semiconductor R309 R306 R326 Location Q310 Q307 R305 Q306 Q303 Q308 Ref. No. Location R316 JW102...

  • Page 7: Schematic Diagram - Main Section

    SA-WP785 1-3. SCHEMATIC DIAGRAM — MAIN SECTION — • See page 4 for IC Block Diagrams. R209 8.2k R208 5.6k IC202(1/2) NJM4565D Q102 R202 C201 2SC2785TP-E C203 C204 0.22 0.22 IC202(2/2) R207 NJM4565D R123 C120 C127 J101 D101 (AUDIO IN)

  • Page 8: Printed Wiring Boards - Power Section

    SA-WP785 1-4. PRINTED WIRING BOARDS — POWER SECTION — • :Uses unleaded solder. 1-5. SCHEMATIC DIAGRAM — POWER SECTION — • See page 3 for Circuit Boards Location. POWER TRANS BOARD CNP401 MAIN BOARD CN402 (Page 6) POWER TRANSFORMER CNP401...

  • Page 9: Exploded Views

    SA-WP785 SECTION 2 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • The mechanical parts with no reference The components identified by mark 0 or may have some difference from the original number in the exploded views are not supplied.

  • Page 10: Section 3 Electrical Parts List

    SA-WP785 SECTION 3 INPUT CONTROL ELECTRICAL PARTS LIST MAIN NOTE: • Due to standardization, replacements in the • RESISTORS When indicating parts by reference number, parts list may be different from the parts All resistors are in ohms. please include the board name.
  • Page 11 SA-WP785 MAIN POWER TRANS Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D303 8-719-991-33 DIODE 1SS133T-72 R307 1-249-411-11 CARBON 1/4W D304 8-719-991-33 DIODE 1SS133T-72 D305 8-719-991-33 DIODE 1SS133T-72 R308 1-249-411-11 CARBON 1/4W R309 1-249-408-11 CARBON 1/4W...

  • Page 12: Switch Board

    SA-WP785 SWITCH Ref. No. Part No. Description Remark SWITCH BOARD ************* < CAPACITOR > 0 C901 1-117-703-11 CERAMIC 0.0047uF 99% 250V < CONNECTOR > * CN3 1-695-044-11 PIN, CONNECTOR (3.96mm PITCH) 2P * CN20 1-695-044-11 PIN, CONNECTOR (3.96mm PITCH) 2P <...
  • Page 13 SA-WP785 MEMO...

  • Page 14: Revision History

    SA-WP785 REVISION HISTORY 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. Date Description of Revision...

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