Panasonic SB-WA101E Manuale utente

nSPEAKER SECTION

Type 1 way 1 speaker system

Bass-reflex type

Speaker

Woofer 17 cm cone type x 1

Sound pressure level 81 dB/W (1.0 m)

Frequency range (with amp) 32 Hz - 300 Hz (at -16 dB)

38 Hz - 240 Hz (at -10 dB)

nAMPLIFIER SECTION

Output power 100 W (6 Ω)(THD0.9%)

Input sensitivity / Input Impedance 300 mV/33 kΩ(RCA jack)

Phase switching NORMAL/REVERSE

Low pass filter 50 Hz - 200 Hz Variable

nGENERAL

Power supply

AC 230 - 240 V, 50Hz (EB)

AC 230 V, 50Hz (E)

Power consumption 168 W

Dimensions (W x H x D) 162 mm x 457 mm x 420 mm

Mass 11.3 kg

Power consumption in input

standb condition:

Note :

Specifications are subject to change without notice.

Mass and dimensions are approximate.

For SB-TP100E-S only

rights reserved. Unauthorized copying and

distribution is a violation of law.

SB-WA101E

SB-WA101EB

Colour

(S)... Silver Type

nSystem : SB-TP100E-S Front Speaker : SB-FS100E-S

Surround Speaker : SB-FS100E-S

Center Speaker : SB-PC100E-S

Subwoofer : SB-WA101E-S

For SB-TP100EB-S only

nSystem : SB-TP100EB-S Front Speaker : SB-FS100E-S

Surround Speaker : SB-FS100E-S

Center Speaker : SB-PC100E-S

Subwoofer : SB-WA101EB-S

SB-TP100E-S consists of:

SB-FS100E-S (x 4), SB-PC100E-S (x 1) and SB-WA101E-S (x 1)

SB-TP100EB-S consists of:

SB-FS100E-S (x 4), SB-PC100E-S (x 1), SB-WA101EB-S (x 1)

Active Subwoofer System

Specification

ORDER NO. MD0604114C2

1 Safety Precautions 3

1.1. General Guidelines 3

1.2. Caution for AC Cord 4

1.3. Before Repair and Adjustment 5

1.4. Protection Circuitry 5

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices 6

3 Warning 7

3.1. Service caution based on legal restrictions 7

4 Accessory 8

5 Connection of the Speaker Cables 8

6 Assembling and Disassembling 9

6.1. Caution 9

6.2. Disassembly flow chart 9

6.3. Disassembly of Stand ornament 10

6.4. Disassembly of Power amplifier unit 10

6.5. Disassembly of Woofer speaker 11

6.6. Disassembly of Power P.C.B. 11

6.7. Disassembly of Transformer P.C.B. 12

6.8. Disassembly of Level control P.C.B. 12

7 Connection of the Speaker Wiring 14

8 Wiring Connection Diagram 15

9 Block Diagram 17

10 Notes of Schematic Diagram 19

11 Schematic Diagram 21

11.1. Power Circuit, Level Control Circuit, Transformer Circuit

and LED Circuit 21

12 Printed Circuit Board 23

12.1. Power P.C.B., Level Control P.C.B., Transformer P.C.B.

and LED P.C.B. 23

13 Illustration of IC's, Transistors and Diodes 25

14 Exploded view 26

14.1. Cabinet Parts Location 26

14.2. Packaging 27

15 Replacement Parts List 28

CONTENTS

Page Page

SB-WA101E / SB-WA101EB

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.

3. After servicing, check for leakage current checks to prevent from being exposed to shock hazards.

1.1.1. Leakage Current Cold Check

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.

2. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each exposed metallic cabinet part on

the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the

chassis, the reading should be between 1MΩand 5.2Ω.

When the exposed metal does not have a return path to the chassis, the reading must be .

Figure 1

1.1.2. Leakage Current Hot Check (See Figure 1)

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.

3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.

4. Check each exposed metallic part, and measure the voltage at each point.

5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.

6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may

be used to make the hot checks, leakage current must not exceed 1/2 milliamp. should the measurement is outside of the limits

specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned

to the customer.

SB-WA101E / SB-WA101EB

1.2. Caution for AC Cord

SB-WA101E / SB-WA101EB

1.3. Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C701 & C702 through a 10Ω, 1W resistor to ground.

DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.

After repairs are completed, restore power gradually using a variac, to avoid overcurrent.

Current consumption at 240V, 50 Hz in NO SIGNAL mode should be 200~500 mA (E).

Current consumption at 230-240 V, 50 Hz in NO SIGNAL mode should be 200~500 mA (EB).

1.4. Protection Circuitry

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.

If this occurs, follow the procedure outlines below:

1. Turn off the power.

2. Determine the cause of the problem and correct it.

3. Turn on the power once again after one minute.

Note:

When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

SB-WA101E / SB-WA101EB

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by electricity. Such components commonly are called

Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and

semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage

caused by electro static discharge (ESD).

1. Immediately before handling any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your

body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,

which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equiped with ES devices, place the assembly on a conductive surface such as aluminium

foil, to prevent electrostatic charge build up or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can

generate electrical charge to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most

replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminium foil or

comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material

to the chassis or circuit assembly into which the device will be installed.

Caution

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize body motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing

together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to

damage an ES device).

SB-WA101E / SB-WA101EB

3 Warning

3.1. Service caution based on legal restrictions

3.1.1. General description about Lead Free Solder (PbF)

The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this

equipment in considering the globally environmental conservation.

The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin

(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that

of the normal solder.

Definition of PCB Lead Free Solder being used

The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.

(See right figure)

Service caution for repair work using Lead Free Solder (PbF)

The lead free solder has to be used when repairing the equipment for which the lead free solder is used.

(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)

To put lead free solder, it should be well molten and mixed with the original lead free solder.

Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.

Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt

the lead free solder.

Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30

degrees C (662±86°F).

Recommended Lead Free Solder (Service Parts Route.)

The following 3 types of lead free solder are available through the service parts route.

RFKZ03D01K-----------(0.3mm 100g Reel)

RFKZ06D01K-----------(0.6mm 100g Reel)

RFKZ10D01K-----------(1.0mm 100g Reel)

Note

* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%

SB-WA101E / SB-WA101EB

4 Accessory

AC power cord.... 1 pc

(For E only)

AC power cord.... 1 pc

(For EB only)

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 6Ω.

1. Connect with the included monaural connection cable to the receiver or amplifier’s subwoofer output terminal.

2. Connect the AC power supply cord to the household AC outlet.

Subwoofer

Connect using the included monaural connection cable (D) to the receiver or amplifier’s subwoofer output terminal.

Connect the AC power supply cord (E) to the household AC outlet (F).

Note:

Do not move the speaker while the speaker cables are connected.

This may cause a short circuit.

Make sure to bundle the speaker cable with a string etc. when relocating the speaker cables.

SB-WA101E / SB-WA101EB

6 Assembling and Disassembling

6.1. Caution

“ATTENTION SERVICER”

Some chassis components may be 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.

Special reassembly procedures are described only when required.

3. Select items from the following index when checks or replacement are required.

Below is the list of disassembly sections

Disassembly of Stand ornament

Disassembly of Power amplifier unit

Disassembly of Woofer

Disassembly of Power P.C.B.

Disassembly of Power IC

Disassembly of Transformer P.C.B.

Disassembly of Level control P.C.B.

6.2. Disassembly flow chart

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.

SB-WA101E / SB-WA101EB

Step 1: Remove 5 screws.

Step 2: Remove stand ornament.

6.4. Disassembly of Power

amplifier unit

Follow (step 1) to (step 2) in item 6.3.

Step 1: Upset the unit.

Step 2: Remove 5 screws.

Step 3: Remove 2 screws. (see making on rear cabinet)

Step 4: Pull out the Power amplifier unit slowly as arrow shown.

Step 5: Disconnect connectors (CN501, CN507, CN601 and

CP701).

6.3. Disassembly of Stand ornament

SB-WA101E / SB-WA101EB

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