Pioneer A-20-S: Before you start

01

Before you start

4

En

Chapter 1:

Before you start

What’s in the box

Please confirm that the following accessories are in the 

box when you open it.

• Remote control (Except A-10)

• AAA/IEC R03 dry cell batteries x2 (Except A-10)

• Power  cord

• Warranty card

• Operating instructions (This document)

 Note

• Illustrations featured in the Operating Instructions 

may have been modified or simplified for ease of 

explanation, and may therefore differ from the 

actual product appearance.

• The illustrations used here are mainly of the A-30.

Loading the batteries in the remote 

control (Except A-10)

1

Open the rear lid.

2

Insert the new batteries, matching the 

polarities as indicated inside the case.

3

Close the rear lid.

The batteries included with the unit have been provided 

to allow you check product operation and may not last 

long. We recommend using alkaline batteries that have 

a longer life.

WARNING

• Do not use or store batteries in direct sunlight or 

other excessively hot place, such as inside a car or 

near a heater. This can cause batteries to leak, 

overheat, explode or catch fire. It can also reduce 

the life or performance of batteries.

 Caution

Incorrect use of batteries may result in such hazards as 

leakage and bursting. Observe the following 

precautions:

• When inserting the batteries, make sure not to 

damage the springs on the battery’s 



 terminals.

A-30

A-20

A-30

A-20

A-30

A-20

• Do not use any batteries other than the ones 

specified. Also, do not use a new battery together 

with an old one.

• When loading the batteries into the remote control, 

set them in the proper direction, as indicated by the 

polarity marks (



 and 



).

• Do not heat batteries, disassemble them, or throw 

them into flames or water.

• Batteries may have different voltages, even if they 

are the same size and shape. Do not use different 

types of batteries together.

• To prevent leakage of battery fluid, remove the 

batteries if you do not plan to use the remote 

control for a long period of time (1 month or more). 

If the fluid should leak, wipe it carefully off the 

inside of the case, then insert new batteries. If a 

battery should leak and the fluid should get on your 

skin, flush it off with large quantities of water.

• When disposing of used batteries, please comply 

with governmental regulations or environmental 

public institution’s rules that apply in your country/

area.

Using the remote control

The remote has a range of about 7 m at an angle of about 

30º from the remote sensor.

Keep in mind the following when using the remote 

control:

• Make sure that there are no obstacles between the 

remote and the remote sensor on the unit.

• Remote operation may become unreliable if strong 

sunlight or fluorescent light is shining on the unit’s 

remote sensor.

• Remote controllers for different devices can 

interfere with each other. Avoid using remotes for 

other equipment located close to this unit.

• Replace the batteries when you notice a fall off in 

the operating range of the remote.

Installing the amplifier

When installing this unit, make sure to put it on a level 

and stable surface. 

• Don’t install it on the following places:

– on a color TV (the screen may distort)

– near a cassette deck (or close to a device that 

gives off a magnetic field). This may interfere with 

the sound.

– in direct sunlight

– in damp or wet areas

– in extremely hot or cold areas

– in places where there is vibration or other 

movement

– in places that are very dusty

– in places that have hot fumes or oils (such as a 

kitchen)

• Do not mount the unit on a sofa or other object or 

material with absorbent qualities, since sound 

quality may be adversely affected.

7 m

30 °

30 °

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