Handheld TV User Manual

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POWER
SUPPLY
UNIT
18 FOOT
CONSOLE
CORD
TV/STUDIO
II
SELECTOR
SWITCH
KEYBOARD
A
ON/OFF
INDICATOR LIGHT
STUDIO II CONSOLE
CLEAR
BUTTON
KEYBOARD
B
CHANNEL
2/CHANNEL
3
SWITCH
SOUND
ON/OFF
SWITCH
(UNDER
CONSOLE)
Figure 1.
Studio
II Major
Assemblies
Description
GENERAL
DESCRIPTION
Studio
II
is
a
sophisticated,
microprocessor-based
system
for
home
entertainment
using a
broadcast
TV
receiver
as the
display
device.
Heart
of
the
Studio
II is
a
solid-state,
40-pin
integrated
circuit
microprocessor
that
functions
as a
micro-miniature
computer.
It
provides
central
computer
control
for a great
variety
of
educational
and
entertainment
programs.
Program
memory for
five
built-in
games
-
"Doodles",
"Patterns",
"Bowling",
"Freeway",
and
"Addition"
—
is included
in the
console. A
receptacle
in the
console
accepts
plug-in program
cartridges for
many
additional
games
such
as
"Tennis",
"Baseball"
and
"Blackjack".
SYSTEM
DESCRIPTION
Studio
II consists of
three
major
pieces:
Control
Console
—
Houses
the
keyboards and
all
electronics
for
program
selection
and
processing.
All electronics
in the
console
(digital,
RF oscillator/modulator and audio circuits)
are
on
a
single PC
board. Signal information from the console
is
transferred to
the Selector Switch
Unit through
a
single
coaxial
cable.
This
same
cable carries DC power from the
Selector Switch
Unit
to
the console to operate the
electronics.
Selector
Switch Unit
—
Forms
the
interface between the
Control
Console,
the Studio II Power Supply Unit, the TV
receiving
antenna and
the
TV
receiver.
A
two-position switch
allows
the TV
receiver
to
be connected conveniently
to
either
the Studio
II or to
the receiver's antenna system. This switch
also
serves as the
game's on/off switch.
Power
Supply Unit
-
A
sealed, 120
VAC to 9 VDC
adapter
with
a
6-foot (1
.8m) cord and
plug that connects
to a
minia-
ture
(3mm)
phone jack
on the
Switch Selector
Unit. The
9
VDC
is coupled to
the game's 18-foot (5.5m) coaxial cable
through an
RF-filtering circuit housed in the Selector Switch
Unit.
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