Panasonic sb wa 930 ee service manual

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ORDER NO. M D0503099C3

Service Manual

Active Subwoofer System

SB-WA930EE

Colour

(S)... Silver Type

SB-WA930

Spedficafion
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.
2. Woofer 15 cm Cone type
Output sound pressure 84 dB/W (1.0 m) n System : SC»HT930(EE) Music Center: SA-HT930(EE)
Frequency range 34 Hz-220 Hz (-16 (13) Satellite Speakers: SB-HT880(EB)

38 Hz-190 HZ (-10 dB) Active Subwoofer: SB»WA930(EE)
Dimensions (W x H x D) 202 x 410 x 500 mm
Mass 13'7 k9 SB-HT880EB-S

Front Speakers SB-FSQSOP-S
" General Center Speaker SB-PCQBOP-S
Power consumption 390 W Surround Speakers SB-FSBSOEBVS
Power supply AC 230V, 50Hz
Power consumption (standby 0.7 W
mode)
A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

it does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced protessional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

CONTENTS

Page Page

1 Safety Precautions ------------------------------------------------------------------ 3 2.1. About lead free solder (PbF) ------------------------------------------ 4
1.1. GENERAL GUIDELINES ------------------------------------------------ 3 3 Before Repair and Adjustment ----------------------------------------------- 4

2 Handling the Lead-free Solder ------------------------------------------------ 4 4 Protection Circuitry ----------------------------------------------------------------- 4

© 2005 Matsushita Electric Industrial Co. Ltd.. All

I
rights reserved. Unauthorized copying and
distribution is a violation of law.

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SB-WABIWEE

5 Connection of the Speaker Cables ----------------------------------------- 5
6 Disassembly Procedure ---------------------------------------------------------- 6
6.1. Disassembly flow chart ------------------------------ 6

6.2. Disassembly of the Speaker Unit and Checking of the

P.C.B. --------------------------------------------------------------------------- 8
7 Voltage Measurement and Waveform Chart ......................... 14

7.1. Voltage Measurement .................................................. 14

7.2. Waveform Chart ........................................................... 15

8 Block Diagram ............................................................. 15

9 Notes of Schematic Diagram ------------------------------------------------ 17

10 Schematic Diagram --------------------------------------------------------------- 13
10.1. Power Circuit-- -18

10.2. Transformer Circuit and AC Inlet Circuit --

10.3. Amplifier Circuit ------------------------------------------------------------ 21
11 Printed Circuit Board ------------------------------------------------------------ 22
11.1. Power P.C.B. -------------------------------------
11.2. AC Inlet P.C.B. and Transformer P.C.B -
11.3. Amplifier P.C.B. -------------------------
12 Wiring Connection Diagram -------------------------------------------------- 26
13 Illustration of ICs, Transistors and Diodes --------------------------- 27
14 Parts Location and Replacement Parts List ------------------------- 28
14.1. Cabinet ------------------------------------------------------------------------ 29
14.2. Electrical Parts List ------------------------------------------------------- 32
14.3. Packing Materials & Accessories Parts List ------------------- 35
14.4. Packaging -------------------------------------------------------------------- 35