Panasonic SB-WA520EB Service Manual
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Panasonic SB-WA520EB Service Manual

Panasonic SB-WA520EB Service Manual

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COVER
PV
6 Disassembly Procedure

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Summary of Contents for Panasonic SB-WA520EB

  • Page 1: Table Of Contents

    Table Of Contents COVER 1 Safety Precautions 1.1 GENERAL GUIDELINES 1.1.1 LEAKAGE CURRENT COLD CHECK 1.1.2 LEAKAGE CURRENT HOT CHECK (See Figure 1.) 2 Handling the Lead-free Solder 2.1 About lead free solder (PbF) 3 Before Repair and Adjustment 4 Protection Circuitry 5 Connection of the Speaker Cables 6 Disassembly Procedure 6.1 Disassembly flow chart...
  • Page 2 12 Illustration of IC ’ s, Transistors and Diodes 13 Parts Location and Replacement Parts List 13.1 Cabinet 13.1.1 Cabinet Parts Location 13.1.2 Cabinet Parts List 13.2 Electrical Parts List 13.3 Packing Materials & Accessories Parts List 13.4 Packaging...
  • Page 3 Service Manual TOP NEXT ORDER NO. MD0402046C2 Active Subwoofer System SB-WA520EB SB-WA520EG Colour (S)...Silver Type Specification Active subwoofer Type 1 way, 1 speaker system (Bass reflex) Woofer 17 cm cone type Impedance 4Ω Output sound pressure 80 dB/W (1.0 m)
  • Page 4 Music Center: SA-HT520EG Satellite speakers: SB-HT520P Active Subwoofer: SB-WA520EG SB-HT520P-S consists of : SB-FS520P-S x 4 and SB-PC520P-S x 1 © 2004 Panasonic AVC Networks Singapore Pte. Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. TOP NEXT...

  • Page 5: Safety Precautions Pv

    1 Safety Precautions TOP PREVIOUS NEXT 1.1 GENERAL GUIDELINES 1.1.1 LEAKAGE CURRENT COLD CHECK 1.1.2 LEAKAGE CURRENT HOT CHECK (See Figure 1.) TOP PREVIOUS NEXT...

  • Page 6: General Guidelines

    1.1 GENERAL GUIDELINES TOP PREVIOUS NEXT 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, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

  • Page 7: Leakage Current Cold Check

    1.1.1 LEAKAGE CURRENT COLD CHECK TOP PREVIOUS NEXT 1. Unplug the AC cord and connect a jumper between the two prongs on the plug. 2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc.

  • Page 8: Leakage Current Hot Check (See Figure 1.)

    1.1.2 LEAKAGE CURRENT HOT CHECK (See Figure 1.) TOP PREVIOUS NEXT 1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check. 2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15μF capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1.

  • Page 9: Handling The Lead-Free Solder

    2 Handling the Lead-free Solder TOP PREVIOUS NEXT 2.1 About lead free solder (PbF) TOP PREVIOUS NEXT...

  • Page 10: About Lead Free Solder (Pbf)

    2.1 About lead free solder (PbF) TOP PREVIOUS NEXT 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 that standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher.

  • Page 11: Before Repair And Adjustment

    3 Before Repair and Adjustment TOP PREVIOUS NEXT Disconnect AC power, discharge Power Supply Capacitors C546, C547, C548, C549 through a 10 Ω, 1 W resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.

  • Page 12: Protection Circuitry

    4 Protection Circuitry TOP PREVIOUS NEXT The protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when the power is turned on. Sound stops during a performance. The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are “shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.

  • Page 13: Connection Of The Speaker Cables Pv

    5 Connection of the Speaker Cables TOP PREVIOUS NEXT 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. 1.
  • Page 14 6 Disassembly Procedure TOP PREVIOUS NEXT “ATTENTION SERVICER” Some chassis components may have sharp edges. Be careful when disassembling and servicing. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. For reassembly after operation checks or replacement, reverse the respective procedures.

  • Page 15: Disassembly Flow Chart

    6.1 Disassembly flow chart TOP PREVIOUS NEXT The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing. To assemble the unit, reverse the steps shown in the chart below. TOP PREVIOUS NEXT...

  • Page 16: Disassembly Of The Speaker Unit And Checking Of The P.c.b.s

    6.2 Disassembly of the Speaker Unit and Checking of the P.C.B.s. TOP PREVIOUS NEXT Step 1: Remove all the screws. Step 2: Remove the stand base.
  • Page 17 Step 3: Remove all the screws from the bottom of the speaker unit. Step 4: Remove the screws from the rear panel’s speaker unit guide.
  • Page 18 Step 5: Remove the screws from the subwoofer. Disassembly of Power Amp unit.
  • Page 19 Step 6: Remove 2 screws from the Power Amp unit.
  • Page 20 Step 7: Pull out the Power Amp unit slightly as shown. (Note: Be careful of attach wire at CN506).
  • Page 21 Step 8: Release the connector CN506 then pull out the entire Power Amp unit.
  • Page 22 Steps 9 & 10: Remove all the screws. Step 11: Release the connector CN507 to remove the rear panel.
  • Page 23 Checking for the Power and AC Inlet P.C.B. Step 12: Remove the screws from the AC Inlet P.C.B.
  • Page 24 Steps 13 & 14: Remove the screws.
  • Page 25 Step 15: Place the Power P.C.B. and the AC Inlet P.C.B. as shown for checking. Checking for the Transformer P.C.B.
  • Page 26 Step 16: Remove the screws.
  • Page 27 Step 17: Place the P.C.B. as shown for checking. Replacement of the Power IC and Transistor...
  • Page 28 Step 1: Desolder the Power IC and Transistor terminals. Step 2: Remove the screws from the IC501.
  • Page 29 Step 3: Remove the screw. Step 4: Replacement of the Power IC and Transistor.

  • Page 30: Connection Of The Speaker Wiring Pv

    7 Connection of the Speaker Wiring TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 31: Block Diagram

    8 Block Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 32: Schematic Diagram

    9 Schematic Diagram TOP PREVIOUS NEXT (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. Accordingly, there may arise some error in voltage values and waveformsdepending upon the internal impedance of the tester or the measuring unit.

  • Page 33: Printed Circuit Board

    10 Printed Circuit Board TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 34: Wiring Connection Diagram

    11 Wiring Connection Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 35: Illustration Of Ic's, Transistors And Diodes

    12 Illustration of IC’s, Transistors and Diodes TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 36: Parts Location And Replacement Parts List

    13 Parts Location and Replacement Parts List TOP PREVIOUS NEXT Notes: Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardent (resistors), high-quality sound (capacitors), low noise (resistors), etc are used. When replacing any of these components, be sure to use only manufacturer’s specified parts shown in the parts list.
  • Page 37 13.3 Packing Materials & Accessories Parts List 13.4 Packaging TOP PREVIOUS NEXT...

  • Page 38: Cabinet

    13.1 Cabinet TOP PREVIOUS NEXT 13.1.1 Cabinet Parts Location 13.1.2 Cabinet Parts List TOP PREVIOUS NEXT...

  • Page 39: Cabinet Parts Location

    13.1.1 Cabinet Parts Location TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 40: Cabinet Parts List

    13.1.2 Cabinet Parts List TOP PREVIOUS NEXT Ref. No. Part No. Part Name & Description Remarks CABINET AND CHASSIS RFKHBWA520GC ACT. SUBWOOFER ASS’Y RMVX0077-J SPEAKER UNIT GUARD RMQX0088-J EVA PACKING FOR WOOF [M] RGKX0255-SJ STAND ORNAMENT RGRX0033C-AJ REAR PANEL [M]EG RGRX0033C-BJ REAR PANEL [M]EB...

  • Page 41: Electrical Parts List

    13.2 Electrical Parts List TOP PREVIOUS NEXT Ref. No. Part No. Part Name & Description Remarks PRINTED CIRCUIT BOARD REP3435M POWER P.C.B./ AC INLET P.C.B./ TRANSFORMER P.C.B./ LED P.C.B. [M] EG (RTL) REP3435N POWER P.C.B./ AC INLET P.C.B./ TRANSFORMER P.C.B./ LED P.C.B. [M] EB (RTL) INTEGRATED CIRCUITS IC501 RSN311W64B-P...
  • Page 42 D500 B0AACK000004 DIODE D501 B0JAPG000019 DIODE D502 B0JAPG000019 DIODE D503 MA2C700A0F DIODE D504 B0AACK000004 DIODE D505 B0AACK000004 DIODE D506 B0AACK000004 DIODE D507 B0AACK000004 DIODE D508 B0AACK000004 DIODE D509 B0BA5R100013 DIODE D510 B0BA9R600002 DIODE D511 B0HARM000017 DIODE D512 B0HARM000017 DIODE D513 B0HARM000017 DIODE D514...
  • Page 43 CP502 K1KA07A00123 2P CONNECTOR COILS & TRANSFORMERS L500 RLQZ371 LINE FILTER L501 G0AR76Y00001 CHOKE COIL L502 G0AR76Y00001 CHOKE COIL L503 G0AR76Y00001 CHOKE COIL L504 G0AR76Y00001 CHOKE COIL L505 G0AR76Y00001 CHOKE COIL T501 ETP76VSU62CA POWER TRANSFORMER T502 G4C2AAJ00005 BACK-UP TRANSFORMER COMPONENT COMBINATION Z501 ERZV10V511CS ZENER...
  • Page 44 HOLDERS H500 K1YF12000002 12P WIRE HOLDER H505A RMR0312 3P CABLE HOLDER H505B RMR0312 3P CABLE HOLDER JACKS JK500 K2AA2B000004 JK AC INLET JK501 K4BC06B00043 JK502 K4BC04B00075 JK SPEAKER EARTH TERMINAL E500 K4CZ01000027 TERMINALS E501 K4CZ01000027 TERMINALS WIRES REE1205 WIRE UNIT REE1204 WIRE UNIT W500...
  • Page 45 R509 ERDS2TJ472T 4.7K 1/4W R510 ERDS2TJ472T 4.7K 1/4W R511 ERDS2TJ153T 15K 1/4W R512 ERDS2TJ153T 15K 1/4W R513 ERDS2TJ563T 56K 1/4W R514 ERDS2TJ563T 56K 1/4W R515 ERDS2TJ563T 56K 1/4W R516 ERDS2TJ563T 56K 1/4W R517 ERDS2TJ563T 56K 1/4W R518 ERDS2TJ563T 56K 1/4W R519 ERDS2TJ824T 820K 1/4W...
  • Page 46 R546 ERDS2TJ102T 1K 1/4W R547 ERDS2TJ394T 390K 1/4W R548 ERDS2TJ334T 330K 1/4W R549 ERDS2TJ473T 47K 1/4W R550 ERDS2TJ103T 10K 1/4W R551 ERDS2TJ472T 4.7K 1/4W R552 ERDS2TJ562T 5.6K 1/4W R553 ERDS2TJ563T 56K 1/4W R554 ERDS2TJ824T 820K 1/4W R555 ERDS2TJ104T 100K 1/4W R556 ERDS2TJ103T 10K 1/4W...
  • Page 47 R589 ERDS2TJ103T 10K 1/4W R590 ERDS2TJ102T 1K 1/4W R591 ERDS2TJ682T 6.8K 1/4W R592 ERDS2TJ683T 68K 1/4W R593 ERDS2TJ474T 470K 1/4W R594 ERDS2TJ103T 10K 1/4W R595 ERDS2TJ101T 100 1/4W R596 ERDS2TJ473T 47K 1/4W R597 ERDS2TJ103T 10K 1/4W R598 ERDS1FVJ152T 1.5K 1/2W R599 ERDS2TJ223T 22K 1/4W...
  • Page 48 C523 F1D1H473A012 0.047 50V C524 F1D1H1040002 0.1 50V C525 F1D1H1040002 0.1 50V C526 F1D1H1040002 0.1 50V C527 F1D1H1040002 0.1 50V C528 F1D1H473A012 0.047 50V C529 F1D1H1040002 0.1 50V C530 ECBT1H102KB5 1000P 50V C531 ECBT1H102KB5 1000P 50V C532 ECBT1H102KB5 1000P 50V C533 ECBT1H102KB5 1000P 50V...
  • Page 49 C562 ECQB1H562JF3 5600P 50V C563 ECQV1H823JL3 0.082 50V C564 ECBT1C122KR5 1200P 16V C565 F1D1H1040002 0.1 50V C566 F1D1H1040002 0.1 50V C567 ECA1HM100B 10 50V C568 ECBT1C103NS5 0.01 16V C569 F1D1H473A012 0.047 50V TOP PREVIOUS NEXT...

  • Page 50: Packing Materials& Accessories Parts List

    13.3 Packing Materials& Accessories Parts List TOP PREVIOUS NEXT Ref. No. Part No. Part Name & Description Remarks PACKING MATERIALS RPNX0232 POLYFOAM RPFX0071 MIRAMAT BAG TOP PREVIOUS NEXT...

  • Page 51: Packaging

    13.4 Packaging TOP PREVIOUS TOP PREVIOUS...
  • Page 54 C0AABB000055 B1GCCFJJ0015 RSN311W64B-P KTA12710YTA KTC3199GRTA KRC102MTA KTC2026 MA2C700A0F B0HARM000017 B0BA9R600002 B0AACK000004 Cathode Cathode Anode Anode B0JAPG000019 B0BA6R600008 SLI325URCT31 B0EAKM000122 B0BA5R100013 Cathode Cathode Anode Cathode Cathode Anode Anode Anode...
  • Page 55 CN501 TO MAIN UNIT CN503 7..1 CP502 CENTER SPEAKER JK502 SURROUND RIGHT SPEAKER LED P.C.B. SURROUND CN507 LEFT SPEAKER H505B/ FRONT RIGHT W505 SPEAKER SPEAKER FRONT LEFT JK501 SPEAKER WOOFER H505A/W505 SOLDER SIDE SOLDER SIDE POWER P.C.B.
  • Page 56 POWER P.C.B. (REP3435M...EG) (REP3435N...EB) J570 CN501 J581 J528 CP502 R543 R544 R540 TO MAIN UNIT Q513 R539 C537 J504 R542 R572 R554 E500 R541 J533 Q514 C532 R522 R521 R537 R585 R545 JK502 C522 L505 J515 CENTRE C528 SPEAKER R582 C549 C519 L502...
  • Page 57 C537 CN503 R554 C541 J505 J513 J544 R570 Q520 J402 D518 J567 J403 J586 J568 J404 J587 J569 J405 J588 J560 J406 H505B J417 R527 /W505 J584 R502 R598 R517 R504 Q503 R508 C511 R507 R503 R528 D533 R568 R567 C517 C543 E501...
  • Page 58 SCHEMATIC DIAGRAM-1 : MAIN SIGNAL LINE : -B SIGNAL LINE POWER CIRCUIT : +B SIGNAL LINE IC501 C551 IC501 0.01 RSN311W64B-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 59 SCHEMATIC DIAGRAM-2 : MAIN SIGNAL LINE : -B SIGNAL LINE POWER CIRCUIT : +B SIGNAL LINE R597 R594 C564 1200P Q514 R592 R403 R599 Q513 100K C565 R593 R571 C568 R591 R572 3.3K 0.01 6.8K 470K C562 IC502 5600P C0AABB000055 C524 C525 DUAL LOW-NOISE OP AMP...
  • Page 60 IC501 RSN311W64B-P POWER HIC POWER CONTROL CIRCUIT POWER CONTROL/PROTECTION CIRCUIT 12(11) (25) (19) D501 D502 Q506 INTERFACE SWITCH TO MAIN BLOCK (JK2000) OF Q505 SA-HT520E/EB/EG-S SWITCHING SURRL(R) FILTER JK501(JK502) SURROUND SPEAKER CENTRE FILTER JK502 CENTRE SPEAKER FILTER SUBWOOFER FRONTL(R) FILTER JK501 FRONT SPEAKER...
  • Page 61 AC INLET P.C.B (REP3435M...EG) (REP3435N...EB) FC501 FC502 (BLU) (BRW) F1 125V 2A T502(SUB TRANSFORMER) JK500 Q516 L500 J500 C555 J501 R589 R578 C557 AC IN J502 230-240V C558 J503 50HZ...EB 230V 50HZ...EG R588 RLY501 J526 Q517 J527 J540 J522 R580 C556 CN502 CAUTION...
  • Page 62 SCHEMATIC DIAGRAM-3 : -B SIGNAL LINE : +B SIGNAL LINE C555 R589 35V4.7 Q516 R578 KRC102MTA SYNC SWITCH CN502 D527~D530 R580 B0EAKM000122 PCONT Q517 POWER CIRCUIT R587 KTC2026 2.7K (CP502) ON SYNC VOLTAGE REGULATOR D528 SCHEMATIC D530 SYS6V DIAGRAM-2 C559 HELP 0.01 C556...

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