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Panasonic SB-WA935EE Service Manual
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Panasonic SB-WA935EE Service Manual

Panasonic SB-WA935EE Service Manual

Active subwoofer system, silver type
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Specification
n Active subwoofer
Type
Speaker unit(s)
1. Woofer
2. Woofer
Output sound pressure
Frequency range
Dimensions (W x H x D)
Mass
n General
Power consumption
Power supply
CONTENTS
1 way, 2 speaker system, Bass reflex
15 cm Cone type
15 cm Cone type
84 dB/W (1.0 m)
34 Hz-220 Hz (-16 dB)
38 Hz-190 Hz (-10 dB)
202 x 410 x 500 mm
AC 230V, 50Hz
Active Subwoofer System
SB-WA935EE
Colour
(S)... Silver Type
Note :
Specifications are subject to change without notice.
Mass and dimensions are approximate.
n System : SC-HT935(EE)
13.7 kg
390 W
Page
3
3
4
4
4
ORDER NO. MD0504115C3
Music Center: SA-HT935(EE)
Satellite Speakers: SB-HT880(EB)
Active Subwoofer: SB-WA935(EE)
© 2005 Matsushita Electric Industrial Co. Ltd.. All
rights
reserved.
Unauthorized
distribution is a violation of law.
Page
4
5
6
6
copying
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Summary of Contents for Panasonic SB-WA935EE

  • Page 1: Table Of Contents

    ORDER NO. MD0504115C3 Active Subwoofer System SB-WA935EE Colour (S)... Silver Type Specification n Active subwoofer Type 1 way, 2 speaker system, Bass reflex Note : Speaker unit(s) Specifications are subject to change without notice. 1. Woofer 15 cm Cone type Mass and dimensions are approximate.
  • Page 2 SB-WA935EE 6.2. Disassembly of the Speaker Unit and Checking of the 11 Printed Circuit Board P.C.B. 11.1. Power P.C.B. 7 Voltage Measurement and Waveform Chart 11.2. AC Inlet P.C.B. and Transformer P.C.B. 7.1. Voltage Measurement 11.3. Amplifier P.C.B. 7.2. Waveform Chart...

  • Page 3: Safety Precautions

    SB-WA935EE 1 Safety Precautions 1.1. GENERAL GUIDELINES 1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

  • Page 4: Handling The Lead-Free Solder

    SB-WA935EE 2 Handling the Lead-free Solder 2.1. About lead free solder (PbF) Distinction of PbF P.C.B. : P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B. Caution: · Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 - 70°F (30 - 40°C) higher.

  • Page 5: Connection Of The Speaker Cables

    SB-WA935EE 5 Connection of the Speaker Cables · Be sure to connect speaker cables before connecting the AC power supply cord. · The load impedance of any speaker used with this unit must be 4Ω. · Be sure to connect the cable from the right speaker to the right terminal and the cable from the left speaker to the left terminal.

  • Page 6: Disassembly Procedure

    SB-WA935EE 6 Disassembly Procedure “ATTENTION SERVICER” Some chassis components may have sharp edges. Be careful when disassembling and servicing. 1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. 2. For reassembly after operation checks or replacement, reverse the respective procedures.
  • Page 7 SB-WA935EE 6.1.2. Disassembly of Rear Assembly...

  • Page 8: Disassembly Of The Speaker Unit And Checking Of The P.c.b

    SB-WA935EE 6.2. Disassembly of the Speaker Unit and Checking of the P.C.B. 6.2.1. Disassembly of the Front Panel Unit Step 3: Use the screwdriver to slightly lift up the Front Panel Unit as arrow shown. Step 1: Slot in a steel ruler to give a gap between the Front Panel Unit and the Speaker Cabinet Assembly as arrow shown.
  • Page 9 SB-WA935EE · Assembly of the Front Panel Unit. Step 1: Remove 4 screws. Step 1: Clean up the remaining glue at the 6 bosses points and replace with the normal glue. Step 2: Remove the Woofer 1 by detaching the (+) red and (-) black wires.
  • Page 10 SB-WA935EE 6.2.4. Disassembly of the Power Amp Unit Step 1: Remove 4 screws. Step 1: Lay the speaker unit as shown. Remove 7 screws from the bottom of the Speaker Cabinet Assembly Unit. Step 2: Remove the Woofer 2 by detaching the (+) red and (-) black wires.
  • Page 11 SB-WA935EE 6.2.5. Disassembly of the Rear Panel and Fan Unit Follow Step (1) to Step (5) described in section 6.2.4. Step 3: Pull out the Power Amp Unit slightly as arrow shown. Steps 1 & 2: Remove 6 screws from the rear panel.
  • Page 12 SB-WA935EE Step 5: Lay the rear panel and remove the Fan Unit as arrow shown. 6.2.6. Disassembly and checking of the AC Inlet P.C.B. and Amplifier Steps 1 & 2: Remove 4 screws. P.C.B. Follow Step (1) to Step (5) described in section 6.2.4.
  • Page 13 SB-WA935EE Step 6: Remove 2 screws and the transistor holders. Step 1: Disconnect the connector (CN502). Step 2: Remove the AC Inlet P.C.B. by pulling the P.C.B. support claw as arrow shown). Step 7: Flip the Power P.C.B. as shown to desolder the terminals of the Power IC501, Transistors Q511 and Q512.

  • Page 14: Voltage Measurement And Waveform Chart

    SB-WA935EE 7 Voltage Measurement and Waveform Chart Note: · Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with the chassis taken as standard. Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester.

  • Page 15: Waveform Chart

    SB-WA935EE 7.2. Waveform Chart CN501 PIN 1 CN501 PIN 3 CN501 PIN 8 CN501 PIN 21 CD PLAY CD PLAY CD PLAY CD PLAY 18.4Vp-p (10msec.div) 18.0Vp-p (10msec.div) 1.22Vp-p (10msec.div) 5.12Vp-p (10msec.div) CN501 PIN 22 CN501 PIN 24 CN602 PIN 5...

  • Page 16: Block Diagram

    SB-WA935EE 8 Block Diagram IC501 RSN311W64D-P POWER HIC POWER CONTROL CIRCUIT POWER CONTROL/PROTECTION CIRCUIT 11(12) TO MAIN (25) (19) BLOCK (JK2000) OF D501 SA-HT935EE-S Q506 INTERFACE D502 SWITCH Q505 SWITCHING SL(R) FILTER JK501(JK502) SURROUND SPEAKER JK502 FILTER CENTRE SPEAKER FILTER...

  • Page 17: Notes Of Schematic Diagram

    SB-WA935EE 9 Notes of Schematic Diagram (All schematic diagrams may be modified at any time with the development of the new technology) Note: · The voltage value and waveforms are the reference voltage of this unit measured by DC electronic voltmeter (high impedance) and oscilloscope on the basis of chassis.

  • Page 18: Schematic Diagram

    SB-WA935EE 10 Schematic Diagram 10.1. Power Circuit SCHEMATIC DIAGRAM-1 : MAIN SIGNAL LINE : -B SIGNAL LINE POWER CIRCUIT : +B SIGNAL LINE C551 IC501 IC501 0.01 RSN311W64D-P POWER HIC E501 K4CZ01000027 R501 R513 4.7K R502 C507 18P 4.7K R514...
  • Page 19 SB-WA935EE SCHEMATIC DIAGRAM-2 : MAIN SIGNAL LINE : -B SIGNAL LINE POWER CIRCUIT :+B SIGNAL LINE JK502 CENTER S Rch JK501 S Lch L501 F Rch G0AR76Y00001 L502 F Lch G0AR76Y00001 R621 R622 CN603 L505 G0AR76Y00001 C569 C519 C518 R625 0.047...

  • Page 20: Transformer Circuit And Ac Inlet Circuit

    SB-WA935EE 10.2. Transformer Circuit and AC Inlet Circuit SCHEMATIC DIAGRAM-3 : -B SIGNAL LINE : +B SIGNAL LINE C555 R589 35V4.7 Q516 R578 B1GACFJJ0018 SYNC SWITCH CN502 HELP D527~D530 R580 B0EAKM000122 PCONT D.GND Q517 POWER CIRCUIT R587 B1BACG000048 2.7K D528...

  • Page 21: Amplifier Circuit

    SB-WA935EE 10.3. Amplifier Circuit SCHEMATIC DIAGRAM-4 : MAIN SIGNAL LINE : -B SIGNAL LINE AMPILIFIER CIRCUIT : +B SIGNAL LINE IC601 IC601 RSN312H24A-P POWER HIC CN604 R619 L601 C607 18P SUBWOOFER R629 L601,L602 SPEAKER UNIT G0AR76Y00001 R620 L602 C608 18P...

  • Page 22: Printed Circuit Board

    SB-WA935EE 11 Printed Circuit Board 11.1. Power P.C.B. POWER P.C.B (REPX0471B) CN501 J570 J528 CP502 C550 D508 E500 J567 TO MAIN UNIT R583 J504 J533 C576 D504 R522 R521 Q506 J512 D558 R581 R611 JK502 Q505 R577 CENTRE C532 SPEAKER...
  • Page 23 SB-WA935EE D508 D562 J567 Q557 Q556 J504 R583 Q552 C580 H503/W500 J533 CN602 C576 R582 Q553 D504 R606 Q555 Q554 J586 D560 Q501 R558 Q506 Q502 D555 D558 D559 J529 D557 Q520 R564 J587 R402 R581 CN601 Q505 J544 D599...

  • Page 24: Ac Inlet P.c.b. And Transformer

    SB-WA935EE 11.2. AC Inlet P.C.B. and Transformer P.C.B. AC INLET P.C.B (REPX0471B) (BLU) (BRW) T5AL 250V FC501 FC502 T502 (BACK UP TRANSFORMER) Q517 JK500 L500 Q516 J6001 RLY501 C555 R589 R578 J6002 Q515 C557 AC IN C558 J6003 230V 50Hz...

  • Page 25: Amplifier P.c.b

    SB-WA935EE 11.3. Amplifier P.C.B. AMPLIFIER P.C.B (REPX0472B) H601/ H602/W602 W601 J616 J675 CN604 R634 D608 D609 J665 D602 R635 H603 /W603 C606 R631 C615 C621 D601 L601 J678 J696 R629 J627 R624 J644 C618 J686 D604 C608 J619 C616 C619...

  • Page 26: Wiring Connection Diagram

    SB-WA935EE 12 Wiring Connection Diagram POWER P.C.B. SOLDER SIDE CN501 TO MAIN UNIT 7..1 CP502 CN602 H503/W500 1..8 CN601 JK502 CENTRE SPEAKER SURROUND RIGHT SPEAKER SURROUND LEFT SPEAKER...

  • Page 27: Illustration Of Ics, Transistors And Diodes

    SB-WA935EE 13 Illustration of ICs, Transistors and Diodes RSN311W64D-P B1BACG000048 RSN312H24A-P B1GCCFJJ0016 B1AACF000117 B1BCCG000023 B1ACCF000094 2SD0592ARA B1BAAJ000003 B1GACFJJ0018 B0EAKM000122 B0FBAM000009 Cathode Anode B0BA01900005 B0BA5R100013 B0JAPG000019 MA2C700A0F B0AACK000004 B0BA01100004 B0BA01200008 B0EAKM000117 B0BA01400009 B0BA02300017 B0BA5R700008 B0BA6R600008 Cathode Cathode Cathode Anode Anode Anode...

  • Page 28: Parts Location And Replacement Parts List

    SB-WA935EE 14 Parts Location and Replacement Parts List Notes: · Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low noise (resistors), etc are used.

  • Page 29: Cabinet

    SB-WA935EE 14.1. Cabinet 14.1.1. Cabinet Parts Location...
  • Page 30 SB-WA935EE...
  • Page 31 SB-WA935EE 14.1.2. Cabinet Parts List Ref. Part No. Part Name & Description Remarks CABINET AND CHASSIS RFKHBWA880EB SUB WOOFER CAB ASS’Y XTB4+12AFJ WOOD SCREW B3AAA0000583 LED (RED) RGKX0284-J XTB3+12GFJ SCREW RKAX0019-KK LEG CUSHION RYQX0180-S FRONT PANEL UNIT RMQX0110 EVA PACKING (WOOFER)

  • Page 32: Electrical Parts List

    SB-WA935EE 14.2. Electrical Parts List Ref. Part No. Part Name & Description Remarks D606 B0BA01200008 DIODE Ref. Part No. Part Name & Description Remarks D607 B0BA02300017 DIODE D608 B0BA01400009 DIODE PRINTED CIRCUIT BOARD D609 B0BA01900005 DIODE D610 B0BA01400009 DIODE REPX0471B POWER P.C.B./ AC INLET...
  • Page 33 SB-WA935EE Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks E501 K4CZ01000027 TERMINAL R589 ERDS2TJ103T 10K 1/4W R590 ERDS2TJ102T 1K 1/4W WIRES R600 ERDS2TJ473T 47K 1/4W R601 ERDS2TJ473T 47K 1/4W REEX0403 PRI WIRE (BLUE)
  • Page 34 SB-WA935EE Ref. Part No. Part Name & Description Remarks C546 ECA1SM332C5 3300 100V C547 ECA1SM472C5 4700 100V C548 ECA1SM472C5 4700 100V C549 ECA1SM332C5 3300 100V C550 F1D1C103A007 0.01 16V C551 F1D1H103A046 0.01 50V C553 ECQE2104KF3 0.1 250V C554 ECQE1104KF3 0.1 100V...

  • Page 35: Packing Materials & Accessories Parts List

    SB-WA935EE 14.3. Packing Materials & Accessories Parts List Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PACKING MATERIALS RPNX0308 POLYFOAM RPFX0114 MIRAMAT BAG 14.4. Packaging FLE0504/A/S/E/N/J/P...

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