Radio Shack 42-4058, Owner'S Manual

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This equipment has been tested and found 
to comply with the limits for a Class B digital 
device, pursuant to Part 15 of the 

FCC

Rules. These limits are designed to provide 
reasonable protection against harmful 
interference in a residential installation. This 
equipment generates, uses and can radiate 
radio frequency energy and, if not installed 
and used in accordance with the 
instructions, may cause harmful interference 
to radio communications. 

However, there is no guarantee that 
interference will not occur in a particular 
installation. If this equipment does cause 
harmful interference to radio or television 
reception, which can be determined by 
turning the equipment off and on, the user is 
encouraged to try to correct the interference 
by one or more of the following measures:

• Reorient or relocate the receiving 

antenna.

• Increase the separation between the 

equipment and receiver. 

• Connect the equipment into an outlet on 

a circuit different from that to which the 
receiver is connected. 

• Consult your local RadioShack store or 

an experienced radio/TV technician for 
help.

• If you cannot eliminate the interference, 

the FCC requires that you stop using 
your keyboard. 

Changes or modifications not expressly 
approved by RadioShack may cause 
interference and void the user’s authority to 
operate the equipment.

You must use shielded interface cables with 
this equipment.

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You can power your keyboard using internal 
batteries or with standard AC power using 
an optional AC adapter. 

The keyboard retains the following settings 
in its memory even when the power is turned 
off as long as power is supplied to it (either 
by the batteries or AC adapter):

• tone number

• layer and split

• split point

• touch response

• reverb/chorus 

• DSP

• equalizer

• rhythm number

• tempo

• mixer  mode

• MIDI keyboard channel

• MIDI in chord judge

• MIDI accompaniment out

• assignable jack

• accompaniment volume

• user area tone (synthesizer tone)

• user area accompaniment

• user area DSP

• song memory

• registration mode

If the keyboard loses power (by 
disconnecting the AC adapter when 
batteries are not installed or the batteries 
lose power), these settings are lost or 
initialized to factory settings.

You can also delete or initialize some 
settings independently. See “Resetting the 
Keyboard” on Page 15.

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Your keyboard can use 6 D batteries (not 
supplied) for power. For the best per-
formance and longest life, we recommend 
RadioShack alkaline batteries. 

1. While pressing the tabs on the battery 

compartment cover on the bottom of the 
keyboard, pull up the cover to remove it.

2. Place the batteries in the compartment 

as indicated by the polarity symbols (+ 
and –) marked next to the compartment.

3. Replace the cover.

When the keyboard stops operating 
properly, replace the batteries. 

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You can power the keyboard using a 9V, 
800 mA AC adapter and a size M 
Adaptaplug™ adapter (neither supplied). 
Both are available at your local RadioShack 
store. Connecting an AC adapter 
automatically disconnects any internal 
batteries. 

1. Set the AC adapter’s voltage switch to 

9V

.

2. Insert the Adaptaplug adapter into the 

adapter’s cord so it reads – TIP.

3. Connect the AC adapter’s barrel plug to 

DC 9V

 on the back of the keyboard.

4. Plug the AC adapter’s other end into a 

standard AC outlet.

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If an icon appears at the end of a paragraph, 
go to the box on that page with the 
corresponding icon for pertinent information.

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— Warning 

 — Important

 — Caution 

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Dispose of old batteries promptly and properly. 
Do not burn or bury them.

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Installing Batteries

•

Use only fresh batteries of the required size 
and recommended type.

•

Do not mix old and new batteries, different 
types of batteries (standard, alkaline, or 
rechargeable), or rechargeable batteries of 
different capacities.

•

If you do not plan to use the keyboard with 
batteries for a week or more, remove the 
batteries. Batteries can leak chemicals that 
can destroy electronic parts.

Using AC Power

You must use a Class 2 power 

source that supplies 9V DC and 
delivers at least 800 mA. Its 

center tip must be set to negative and its 
plug must fit the keyboard's DC 9V jack. 
Using an adapter that does not meet these 
specifications could damage the keyboard 
or the adapter.

•

Always connect the AC adapter to the 
keyboard before you connect it to AC 
power. When you finish, disconnect the 
adapter from AC power before you 
disconnect it from the keyboard.

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