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SECTION 5
5.1
Component
The electronics package comprises 8 plug in printed circuit
component cards (daughter cards) approximately 8" x 5".
fit into a printed circuit motherboard.
approximately 21" x 8"
displays,
edge connector to connect to the cabinet cable.forms.
Of the 8 plug in cards, 4 are identical.
card types.
the
motherboard
Each of the card types has a keying slot in the connector
edge to prevent incorrect insertion of either the wrong card type
or that plug or the right card type but inverted.
5.2
The
Motherboard
The Motherboard is a printed circuit card containing all the
interconnecting links of the 8 daughter boards and the links to the
LED displays.
capacitor for the major +5 volt logic supply line.
Two edge connectors,
cableform and 8 $"
upper cabinet.
The description of the operation of the electronics package is
contained in mainly the individual sections for each card type
but
here signals appear on the motherboard, then these signals
are assigned a code and are described fully in the subsequent signal
description
motherboard
ELECTRONICS
Parts
and houses the 4 sets of the 7 segment
the lamps which illuminate the various captions and
Each type is described in the sections following
description.
It also serves as a fixing point for the reservoir
screws fix the motherboard to the front of the
lists.
This has been made part of the section on the
for
PACKAGE
The motherboard is
connect it to the cabinet
Which
Giving 5 different
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