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Panasonic SB-WA933 Service Manual

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ORDER NO. MD0508312C1
A6
Active Subwoofer System
SB-WA933P
Colour
(S)...Silver Type
1
PDF created with pdfFactory Pro trial version
www.pdffactory.com

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Summary of Contents for Panasonic SB-WA933

  • Page 1 ORDER NO. MD0508312C1 Active Subwoofer System SB-WA933P Colour (S)...Silver Type PDF created with pdfFactory Pro trial version www.pdffactory.com...

  • Page 2: Specifications

    AC 120V, 60Hz Power consumption 390 W Music Center: SA-HT933(P) System: SC-HT933(P) Satellite Speakers: SB-HT920(P) Active Subwoofer: SB-WA933(P) Note : Specifications are subject to change without notice. Mass and dimensions are approximate. PDF created with pdfFactory Pro trial version www.pdffactory.com...

  • Page 3: Safety Precautions

    2005 Matsushita Electric Industrial Co. Ltd.. All rights reserved. Unauthorized copying and distribution is a violation of law. 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.

  • Page 4: Leakage Current Cold Check

    exposed to shock hazards. (This “Safety Precaution” is applied only in U.S.A.) 1. Before servicing, unplug the power cord to prevent an electric shock. 2. When replacing parts, use only manufacturer’s recommended components for safety. 3. Check the condition of the power cord. Replace if wear or damage is evident.

  • Page 5: Handling The Lead-Free Solder

    2. Connect a 1.5k , 10 watts resistor, in parallel with a 0.15 capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1. 3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.

  • Page 6: Before Repair And Adjustment

    10°C). - Pb free solder will tend to splash when heated too high (about 1100°F/600°C). - When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the soldering points with the Pb free solder until it melts enough. 3.

  • Page 7: Disassembly Procedure

    2. Insert the wire to the rear panel of the unit and close the lever. 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.
  • Page 8 6.1.1. Disassembly of the Woofer Speakers 6.1.2. Disassembly of the Power Amp Unit 6.2. Disassembly of the Speaker Unit and Checking of the P.C.B. 6.2.1. Disassembly of the Front Panel Unit PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 9 Step 1: Slot in a steel ruler into the holes to give a gap between the Front Panel unit and the speaker cabinet assembly unit as arrow shown. Steps 2: Slot a piece of wood chip in between the Front Panel unit and the steel ruler as arrow shown.
  • Page 10 Step 3: Use the screwdriver slightly lift up the Front Panel unit as arrow shown. Note: Be careful with the bosses which are glued to the unit. Step 4: Remove the Front Panel unit from the speaker cabinet assembly unit as arrow shown. - Assembly of the Front Panel unit.
  • Page 11 Step 2: Replace the Front Panel unit firmly back to the speaker cabinet assembly unit. 6.2.2. Disassembly of Woofer Speaker Unit 1 Follow Step (1) to Step (4) described in section 6.2.1. Step 1: Remove 4 screws from the Woofer 1. PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 12 Step 2: Remove the Woofer 1 by detaching the (+) and (-) wires. 6.2.3. Disassembly of Woofer Speaker Unit 2 Follow Step (1) to Step (4) described in section 6.2.1. Step 1: Remove 4 screws from the Woofer 2. Step 2: Remove the Woofer 2 by detaching the (+) and (-) wires. PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 13 6.2.4. Disassembly of the Power Amp Unit Step 1: Remove 7 screws from the bottom of the speaker cabinet assembly unit. Step 2: Remove 3 screws from the rear panel. PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 14 Step 3: Slightly pull out the Power Amp unit as arrow shown. Step 4: Disconnect the connector CN604 and pull out the entire Power Amp unit. 6.2.5. Disassembly of the Rear Panel and Fan Unit Follow Step (1) to Step (4) described in section 6.2.4. Steps 1 and 2: Remove 7 screws from the rear panel.
  • Page 15 Step 3: Disconnect the connector CN507 to detach the rear panel. Step 4: Remove 2 screws from the rear panel. Step 5: Lay the rear panel flat and remove the fan unit as arrow shown. 6.2.6. Disassembly and checking of the Amplifier P.C.B. and AC Inlet P.C.B. Follow Step (1) to Step (4) described in section 6.2.4.
  • Page 16 Step 1: Check both Amplifier P.C.B. and AC Inlet P.C.B. 6.2.7. Disassembly and checking of the Power P.C.B. and Transformer P.C.B. Follow Step (1) to Step (4) described in section 6.2.4. Follow Step (1) to Step (3) described in section 6.2.5. Steps 1 and 2: Remove 4 screws.
  • Page 17 Follow Step (1) to Step (4) described in section 6.2.4. Follow Step (1) to Step (3) described in section 6.2.5. Step 1: Disconnect the connector CP502. Step 2: Remove the AC Inlet P.C.B. by pulling the P.C.B. support claw as arrow shown. Step 3: Desolder the terminals of IC601, Transistors Q601 and Q602.

  • Page 18: Voltage Measurement And Waveform Chart

    Step 6: Remove 2 screws and the transistor holders. Step 7: Flip the Power P.C.B. as shown to desolder the terminals of the Power IC501, Transistors Q511 and Q512. 7. Voltage Measurement and Waveform Chart 7.1. Voltage Measurement 7.1.1. AC INLET P.C.B. 7.1.2.

  • Page 19: Schematic Diagram

    (capacitors), low-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturer's specified parts shown in the parts list. Caution ! IC, LSI and VLSI are sensitive to static electricity. Secondary trouble can be prevented by taking care during repair. - Cover the parts boxes made of plastics with aluminium foil.
  • Page 20 13. Illustration of IC’s, Transistors and Diodes 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 21 PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 22 14.1.2. Cabinet Parts List PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 23 Ref. No. Part No. Part Name & Description Remarks CABINET AND CHASSIS RFKHBWA930PP SUB WOOFER CAB ASS’Y XTB3+12GFJ SCREW B3AAA0000583 LED (RED) RGKX0284-J XTB4+12AFJ WOOD SCREW (TBZP) RKAX0019-KK LEG CUSHION RYQX0168-S FRONT PANEL UNIT RMQX0110 EVA PACKING (WOOFER) RGNX0313-S SPEC LABEL XTS4+20JFJ SCREW REM0072-4...
  • Page 24 Ref. No. Part No. Part Name & Description Remarks Q552 B1ACCF000094 TRANSISTOR Q553 2SD0592ARA TRANSISTOR Q554 B1ACCF000094 TRANSISTOR Q555 2SD0592ARA TRANSISTOR Q556 B1ACCF000094 TRANSISTOR Q557 2SD0592ARA TRANSISTOR Q559 B1AACF000117 TRANSISTOR Q601 B1BACG000048 TRANSISTOR Q602 B1BCCG000023 TRANSISTOR Q603 B1BAAJ000003 TRANSISTOR DIODES D500 B0AACK000004 DIODE...
  • Page 25 Ref. No. Part No. Part Name & Description Remarks CN502 K1KB07B00020 7P CONNECTOR CN503 K1KA15BA0056 15P CONNECTOR CN507 K1KA02AA0186 2P CONNECTOR CN601 K1KA10AA0319 10P CONNECTOR CN602 K1KA08AA0319 8P CONNECTOR CN603 K1KA08AA0319 8P CONNECTOR CN604 K1KA04BA0125 4P CONNECTOR CP502 K1KA07AA0297 CONNECTOR T501 G4C8AHD00002 POWER TRANSFORMER...
  • Page 26 E501 K4CZ01000027 TERMINAL PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 27 Ref. No. Part No. Part Name & Description Remarks WIRES REEX0403 PRIMARY WIRE (BROWN) REEX0404 PRIMARY WIRE (BLUE) W503 REXX0425 15P WIRE W601 REXX0434 10P WIRE W602 REXX0435 8P WIRE W603 REXX0435 8P WIRE RESISTORS R401 ERDS2TJ224T 220K 1/4W R402 ERDS2TJ102T 1K 1/4W R500...
  • Page 28 Ref. No. Part No. Part Name & Description Remarks R562 ERDS2TJ472T 4.7K 1/4W R563 ERDS1FVJ102T 1K 1/2W R564 ERDS2TJ224T 220K 1/4W R565 ERDS1FVJ392T 3.9K 1/2W R567 ERDS1FVJ152T 1.5K 1/2W R568 ERDS2TJ151T 150 1/4W R569 ERDS1FVJ152T 1.5K 1/2W R570 ERDS2TJ103T 10K 1/4W R571 ERDS1FVJ222T 2.2K 1/2W...
  • Page 29 Ref. No. Part No. Part Name & Description Remarks R635 ERDS2TJ473T 47K 1/4W CAPACITORS C503 F1D1H102A012 1000P 50V C504 F1D1H102A012 1000P 50V C505 F1D1H102A012 1000P 50V C506 F1D1H102A012 1000P 50V C507 F1D1H180A015 18P 50V C508 F1D1H180A015 18P 50V C509 F1D1H220A015 22P 50V C510 F1D1H220A015...

  • Page 30: Packing Materials

    Ref. No. Part No. Part Name & Description Remarks C579 F1D1H103A046 0.01 50V C580 ECEA1HKA2R2B 2.2 50V C601 F2A1G332A003 3300P 100V C602 F2A1G472A003 4700P 100V C603 F2A1G472A003 4700P 100V C604 F2A1G332A003 3300P 100V C605 ECQE1104KF3 0.1 100V C606 ECQE1104KF3 0.1 100V C607 F1D1H180A015 18P 50V...
  • Page 31 FLE0508/P/A/S/E/N PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 32 AC INLET P.C.B (REPX0471E) (BLU) (BRW) 125V 6A FC501 FC502 T502 (SUB-TRANSFORMER) Q517 JK500 Q516 J6001 J900 RLY501 C555 R589 R578 J6002 Q519 C557 AC IN C558 J6003 120V 60Hz J901 Q515 J6004 C571 R588 R500 C556 J6007 R580 J6005 J6008 CN502 7 6 5 4 3 2 1...

  • Page 33: Main 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 C508 18P R524 120K D501-D502 R506 B0JAPG000019 R516 R526 C510 22P...

  • Page 34: Power Circuit

    SCHEMATIC DIAGRAM-2 : MAIN SIGNAL LINE : -B SIGNAL LINE POWER CIRCUIT :+B SIGNAL LINE JK502 CENTER S Rch JK501 S Lch F Rch F Lch CN603 C569 C519 C518 0.047 0.047 0.047 AMPLIFIER CIRCUIT (W603) ON C522 C523 R534 R533 SCHEMATIC 0.047...

  • Page 35: Transformer Circuit

    SCHEMATIC DIAGRAM-3 : -B SIGNAL LINE : +B SIGNAL LINE C555 R589 35V4.7 Q516 R578 B1GACFJJ0018 SYNC SWITCH CN502 D527,D528 R580 B0EAKM000122 PCONT DGND Q517 POWER CIRCUIT R587 B1BACG000048 2.7K D528 (CP502) ON SYNC VOLTAGE REGULATOR SCHEMATIC SYS6V DIAGRAM-2 C559 SUB+B 0.01 C556...
  • Page 36 SCHEMATIC DIAGRAM-4 : MAIN SIGNAL LINE : -B SIGNAL LINE AMPILIFIER CIRCUIT : +B SIGNAL LINE IC601 IC601 RSN312H24A-P POWER HIC CN604 R619 C607 18P SUBWOOFER SPEAKER UNIT R620 C608 18P W603 C615 C611 0.047 1000P R633 820K C610 0.01 R631 10 POWER CIRCUIT (CN603) ON...
  • Page 40 CN501 PIN 1 CN501 PIN 3 CN501 PIN 22 CN501 PIN 24 CD PLAY CD PLAY CD PLAY CD PLAY 16.4Vp-p (10msec.div) 16.2Vp-p (10msec.div) 6.16Vp-p (10msec.div) 6.08Vp-p (10msec.div) CN601 PIN 1 CN601 PIN 3 CN601 PIN 7 CN601 PIN 9 CD PLAY CD PLAY CD PLAY...
  • Page 41 POWER P.C.B. SOLDER SIDE CN501 TO MAIN UNIT 7..1 CP502 CN602 H503/W503 1..8 CN601 JK502 CENTRE SPEAKER SURROUND RIGHT SPEAKER SURROUND LEFT SPEAKER FRONT RIGHT CN603 SPEAKER FRONT LEFT CN507 SPEAKER JK501...

  • Page 42: Signal Lines

    IC501 RSN311W64D-P POWER HIC POWER CONTROL CIRCUIT POWER CONTROL/PROTECTION CIRCUIT 11(12) TO MAIN (25) (19) BLOCK (JK2000) OF D501 SA-HT933P-S Q506 INTERFACE SWITCH D502 Q505 SWITCHING SL(R) FILTER JK501(JK502) SURROUND SPEAKER JK502 FILTER CENTRE SPEAKER FILTER CN603 SUBWOOFER FRONTL(R) JK501(CN603) FILTER FRONT Q602...
  • Page 43 RSN311W64D-P B1AACF000117 RSN312H24A-P B1GCCFJJ0016 B1BACG000048 B1ACCF000094 B1BCCG000023 2SD0592ARA B1BAAJ000003 B0FBAM000009 B1GACFJJ0018 B0EAKM000122 Cathode Anode B0JAPG000019 B0AACK000004 B0BA01900005 MA2C700A0F B0BA5R100013 B0EAKM000117 B0BA01100004 B0BA01200008 B0BA01400009 B0BA6R600008 B0BA5R700008 B0BA02300017 Cathode Cathode Cathode Anode Anode Anode...
  • Page 44 AMPLIFIER P.C.B (REPX0472A) W602 W601 J616 J675 CN604 R634 D609 D608 J665 D602 R635 W603 C606 R631 C615 C621 D601 J678 J699 J696 J627 R624 J644 J686 D604 C608 J619 C616 C619 D605 R620 R633 C611 J700 D603 Q603 C612 J642 J643 J690...
  • Page 45 POWER P.C.B (REPX0471E) CN501 J570 J528 CP502 C550 D508 E500 J567 TO MAIN UNIT J504 R583 J533 C576 D504 R522 R521 Q506 J512 D558 R581 R611 JK502 Q505 R577 CENTRE C532 SPEAKER R537 SURROUND RIGHT 1-SR SPEAKER J622 J593 SURROUND LEFT J594 5-SL SPEAKER...
  • Page 46 D508 D562 J567 Q557 Q556 J504 R583 Q552 C580 J533 CN602 C576 H503/W503 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 J588 J904 J543 J578...

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