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Panasonic SB-WA885EE Service Manual
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Panasonic SB-WA885EE Service Manual

Panasonic SB-WA885EE Service Manual

Active subwoofer system
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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
13 cm Cone type
13 cm Cone type
80 dB/W (1.0 m)
40 Hz-220 Hz (-16 dB)
45 Hz-180 Hz (-10 dB)
201.5 x 368.2 x 491.5 mm
AC 230 V, 50Hz
Active Subwoofer System
SB-WA885EE
Colour
(S)... Silver Type
Note :
Specifications are subject to change without notice.
Mass and dimensions are approximate.
n System : SC-HT885(EE)
11.3 kg
340 W
Page
3
3
4
4
4
4
ORDER NO. MD0506273C3
Music Center: SA-HT885(EE)
Satellite Speakers: SB-HT880(GC)
Active Subwoofer: SB-WA885(EE)
© 2005 Matsushita Electric Industrial Co. Ltd.. All
rights
reserved.
Unauthorized
distribution is a violation of law.
Page
5
6
6
8
copying
and

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Summary of Contents for Panasonic SB-WA885EE

  • Page 1: Table Of Contents

    ORDER NO. MD0506273C3 Active Subwoofer System SB-WA885EE 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 13 cm Cone type Mass and dimensions are approximate.
  • Page 2 SB-WA885EE 7 Voltage Measurement and Waveform Chart 11.1. Power P.C.B. 7.1. Voltage Measurement 11.2. AC Inlet P.C.B. and Transformer P.C.B. 7.2. Waveform 12 Wiring Connection Diagram 8 Block Diagram 13 Illustration of ICs, Transistors and Diodes 9 Notes of Schematic Diagram...

  • Page 3: Safety Precautions

    SB-WA885EE 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: Before Repair And Adjustment

    SB-WA885EE 2 Before Repair and Adjustment Disconnect AC power, discharge Power Supply Capacitors C546~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 5: Connection Of The Speaker Cables

    SB-WA885EE 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-WA885EE 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-WA885EE 6.1.2. Disassembly of Rear Assembly...

  • Page 8: Disassembly Of The Speaker Unit And Checking Of The

    SB-WA885EE 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 Step 1: Slot in a steel ruler to give a gap between the Front Unit as arrow shown.
  • Page 9 SB-WA885EE · 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 (-) Step 2: Replace the Front Panel Unit firmly back to the black wires.
  • Page 10 SB-WA885EE 6.2.4. Disassembly of the Power Amp Unit Step 1: Remove 4 screws. Step 1: Lay the speaker unit as shown. Remove 6 screws from the bottom of the woofer unit. Step 2: Remove the Woofer 2 by detaching the (+) red and (-) black wires.
  • Page 11 SB-WA885EE 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. Step 1 & 2: Remove 7 screws from the rear panel.
  • Page 12 SB-WA885EE 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., Power P.C.B. and Step 4 & 5: Remove 6 screws. Transformer P.C.B. Follow Step (1) to Step (5) described in section 6.2.4.
  • Page 13 SB-WA885EE Step 4: Detach the Power IC and Transistor from Heat sink. 6.2.7. Replacement of Power IC and Transistor Follow Step (1) to Step (5) described in section 6.2.4. Follow Step (1) to Step (3) described in section 6.2.5. Step 1: Desolder the Power IC and Transistor terminal.
  • Page 14 SB-WA885EE 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 SB-WA885EE 7.2. Waveform CN501 PIN 1 CN501 PIN 3 CN501 PIN 8 CN501 PIN 22 CD PLAY CD PLAY CD PLAY CD PLAY 18.2Vp-p (10msec.div) 17.8Vp-p (10msec.div) 1.07Vp-p (10msec.div) 6.72Vp-p (10msec.div) CN501 PIN 24 CN503 PIN 1 CN503 PIN 3...
  • Page 16 SB-WA885EE 8 Block Diagram IC501 RSN311W64D-P POWER HIC POWER CONTROL CIRCUIT POWER CONTROL/PROTECTION CIRCUIT 12(11) (25) (19) D501 D502 Q506 INTERFACE SWITCH TO MAIN BLOCK Q505 (JK2000) OF SA-HT885EE-S SWITCHING SL(R)/SURRL(R) FILTER JK501(JK502) SURROUND SPEAKER CCH/CENTRE FILTER JK502 CENTRE SPEAKER...
  • Page 17 SB-WA885EE 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 SB-WA885EE 10 Schematic Diagram 10.1. Power Circuit SCHEMATIC DIAGRAM-1 : -B SIGNAL LINE POWER CIRCUIT : MAIN SIGNAL LINE : +B SIGNAL LINE IC501 IC501 RSN311W64D-P POWER HIC C551 0.01 E501 R501 R513 K4CZ01000027 4.7K R502 C507 18P 4.7K R514...
  • Page 19 SB-WA885EE SCHEMATIC DIAGRAM-2 : -B SIGNAL LINE POWER CIRCUIT : MAIN SIGNAL LINE : +B SIGNAL LINE JK501 SRLch L501 G0AR76Y00001 FRch R621 FLch L502 G0AR76Y00001 R622 E500 K4CZ01000027 L505 G0AR76Y00001 JK502 L503 G0AR76Y00001 R625 SRRch C569 L504 0.047 G0AR76Y00001...
  • Page 20 SB-WA885EE 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 SB-WA885EE 11 Printed Circuit Board 11.1. Power P.C.B. POWER P.C.B (REPX0470B) CN501 J539 J570 J528 CP502 C550 E500 TO MAIN UNIT D508 J567 R583 J504 J533 C576 D504 C577 Q505 Q506 J512 D558 R521 R522 R581 J521 JK502 C532 CENTRE...
  • Page 22 SB-WA885EE D562 Q557 Q556 Q552 D508 R583 C570 C580 CN503 C576 J586 R606 R582 Q554 Q555 Q506 Q501 D560 R558 Q502 D555 D558 Q553 D557 J587 Q520 R564 R402 R581 J544 J588 D599 J543 J578 J553 J630 J554 D598 J555...
  • Page 23 SB-WA885EE 11.2. AC Inlet P.C.B. and Transformer P.C.B. AC INLET P.C.B (REPX0470B) (BLU) (BRW) T2AL 250V FC501 FC502 T502 (BACK UP TRANSFORMER) JK500 Q517 Q516 L500 J6001 RLY501 C555 J6002 R589 R578 Q519 AC IN C557 230V 50Hz C558 J6003...

  • Page 24: P.c.b

    SB-WA885EE 12 Wiring Connection Diagram CN501 7..1 TO MAIN UNIT CN503 CP502 CENTER SPEAKER JK502 SURROUND RIGHT SPEAKER SURROUND LEFT SPEAKER FRONT RIGHT SPEAKER CN507 FRONT LEFT SPEAKER SPEAKER JK501 WOOFER CN506 SOLDER SIDE POWER P.C.B.
  • Page 25 SB-WA885EE 13 Illustration of ICs, Transistors and Diodes RSN311W64D-P B1GCCFJJ0016 B1BACG000048 B1GACFJJ0018 B1AACF000117 B1BCCG000023 B0BA01900005 B0AACK000004 B1ACCF000094 B0BA5R100013 2SD0592ARA B0BA6R600008 B0BA01100004 B0BA5R600016 Cathode Anode B0JAPG000019 MA2C700A0F B0EAKM000122 B0FBAM000009 B0EAKM000117 Cathode Cathode Cathode Anode Anode Anode...
  • Page 26 SB-WA885EE 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 27 SB-WA885EE 14.1. Cabinet 14.1.1. Cabinet Parts Location...
  • Page 28 SB-WA885EE...
  • Page 29 SB-WA885EE 14.1.2. Cabinet Parts List Ref. Part No. Part Name & Description Remarks CABINET AND CHASSIS RFKHBWA730PP SUB WOOFER CAB ASS’Y XTB3+12GFJ SCREW B3AAA0000583 LED (RED) RGKX0284-H XTB4+12AFJ WOOD SCREW (TBZP) RKAX0019-KJ LEG CUSHION RYQX0167A-S FRONT PANEL UNIT RMQX0106 EVA PACKING (WOOFER)
  • Page 30 SB-WA885EE 14.2. Electrical Parts List Ref. Part No. Part Name & Description Remarks COILS & TRANSFORMERS Ref. Part No. Part Name & Description Remarks L500 ELF15N035AN LINE FILTER PRINTED CIRCUIT BOARD L501 G0AR76Y00001 CHOKE COIL L502 G0AR76Y00001 CHOKE COIL REPX0470B POWER P.C.B./ AC INLET...
  • Page 31 SB-WA885EE Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R512 ERDS2TJ153T 15K 1/4W C501 F1D1H102A012 1000P 50V R513 ERDS2TJ563T 56K 1/4W C502 F1D1H102A012 1000P 50V R514 ERDS2TJ563T 56K 1/4W C503 F1D1H102A012 1000P 50V...
  • Page 32 SB-WA885EE 14.3. Packing Materials & Accessories Parts List Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks PACKING MATERIALS RPNX0317 POLYFOAM RPFX0071 MIRAMAT BAG 15 Packaging FLE0506/A/S/E/N/J/P...

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