Omron 8025G Maintenance Manual page 14

GENERAL INFORMATION
SEcrrON
On
24-line-per-page terminals,
up
to 1,920 characters (80 charactersC,r
line) can be displayed on a IS-inch CRT display.
Up
to 960 characters can be
nlS-
played on 12-1ine-per-page termdnals. The basic memory consists of a 1,024 byte
RAM
(random access memory) refresh memory and a 2,048 byte PROM (programmed read
only memory) or ROM (read only memory) program memory. Communications I/O (input/
output) interfacing conforms with Electronic Industries Association (EIA) Standard
RS-232C. Additional RS-232 interfaces are included to interface the terminal with
a printer and an auxiliary m~mory.
Paragraph
1.2
gives complete specifications for the terminal.
1.1.2
Mechanical Description
External. Figure 1-2 shows tha ou~side of the 8025.
tained within a two-piece, free-standing plastic housin,. Its
design make the unit ideal for table or desk-top installation.
external equipment and primary power is done at the rear panel.
need to be removed to take off the ~op sectlon of the housing.
removed, the internal assemblies are easy to reach.
The terminal is con
size, weight, and
Interfacing with
Only five screws
With this section
Internal. Figure 1-3 shows the inside of the 8025. Most of its circuitr
is contained in a card cage that accommodates
up
to 18 plug-in circuit cards. Im-
mediately above the cage is the CRT electronic circuitry. CRT electronics are ('"
mounted on the chassis and circuit cards. A removable power supply assembly is
,yC;
ted behind the card cage, below the CRT. The keyboard assembly is also removable.
Figure
1-2.
Exterior of 8025 CRT terminal.
1-2