Panasonic sb wa 935 ee service manual

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ORDER NO. MD0504115C3

Service Manual

Spedficafion
n Active Subwoofer
Type

Speaker unit(s)

1. Woofer

2. Woofer

Output sound pressure

Frequency range

Dimensions (W x H x D)

SB-WA935

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

Mass 13.7 kg
n General
Power consumption 390 W

Power supply

AC 230V, SOHZ

Active Subwoofer System

SB-WA935EE

Colour

(S)... Silver Type

Note :

Specifications are subject to change without notice.
Mass and dimensions are approximate.
11 System : SC»HT935(EE) Music Center: SA-HT935(EE)
Satellite Speakers: SB-HT880(EB)
Active Subwoofer: SB»WA935(EE)

SB-HT880EB-S
Front Speaker
Center Speaker
Surround Speaker

SB-FSQSOP-S
SB-PCQBOP-S
SB-FSBSOEBVS

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

1 Safety Precautions ------------------------------------------------------------------ 3
1.1. GENERAL GUIDELINES ------------------------------------------------ 3

2 Handling the Lead-free Solder ------------------------------------------------ 4
2.1. About lead free solder (PbF) ------------------------------------------ 4

3 Before Repair and Adjustment ----------------------------------------------- 4

Panasonic

Page

4 Protection Circuitry ----------------------------------------------------------------- 4
5 COnnection of the Speaker Cables ......................................... 5
6 Disassembly Procedure ---------------------------------------------------------- 6
6.1. Disassembly flow chart ................................................... 6

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

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SB-WABSSEE

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- 4

7.2. Waveform Chart-"- .15

8 Block Diagram ---------------------------------------------------------------------- 16
9 Notes of Schematic Diagram ................................................ 17
10 Schematic Diagram ............................................................... 13
10.1. Power Circuit-- ---------------------------------------------------------- 18
10.2. Transformer Circuit and AC Inlet Circuit ------------------------ 20
10.3. Amplifier Circuit ------------------------------------------------------------ 21

11 Printed Circuit Board ------------------------------------------------------------ 22
11.1. Power P.C.B. --------------------------------------------------------------- 22
11.2. AC Inlet P.C.B. and Transformer P.C.B
11.3. Amplifier P.C.B -

12 Wiring Connection Diagram

13 Illustration of le, Transistors and Diodes ........................... 27
14 Parts Location and Replacement Parts List ......................... 23
14.1. Cabinet ------------------------------------------------------------------------ 29
14.2. Electrical Parts List ------------------------------------------------------- 32
14.3. Packing Materials & Accessories Parts List ------------------- 35

14.4. Packaging -------------------------------------------------------------------- 35