Commodore 1902A Operating Instructions Manual page 4

English
I N T R O D U C I N G Y O U R M O N I T O R
Please read this brief guide carefully before you try to use your monitor. This
manual shows you how to connect the monitor and use it in various operating
modes. It also explains the picture controls and gives instructions for the in-
stallation, use and service of the 1902A.
The Commodore 1902A is a full-color dual monitor, meaning it can display
computer output in either 40- or 80-column screen widths. Some computers, like
the Commodore 64, display screen output in a 40-column format. Others, like
the Commodore PC, require an 80-column screen. The Commodore 128 can
display on both screen widths. You can select the operating mode you want with
the flick of a switch. The switch setting depends on the computer you have
connected to the 1902A monitor.
The 1902A can be used in three operating modes: two 40-column and one
80-column. The t w o 40-column m o d e s are Composite Video (CVBS) and Separated
(LCA) Video. The one 80-column mode is digital RGBI. The following chart shows
recommended monitor operating modes by computer. Depending on your com-
puter, you'll find that certain operating modes give better displays while other
modes may not even produce a picture.
Monitor Operating Mode by Computer Model
Commodore 128
@ Commodore 64
@ Plus/4
@ Commodore 16
Commodore PC
@ = The 40 column composite video and separated (LCA) output capabilities de-
pend on the audio/video port female pin connections. If the A/V port has eight
female pin connections, use the separated (LCA) video output and correspon-
ding cable supplied with the monitor. This cable has an eight pin din male con-
nector on the computer connection end and a six pin din male connector on the
monitor connection end.
If the computer's audio/video port has five female pin connections, use the
composite video output and a corresponding cable not supplied with the monitor
This cable has a five pin din male connector on the computer connection end
and two male phone plug connectors on the monitor connection end. See the
page three for a connecting diagram.
Important Note for Separated (LCA) Video Users:
To enhance the Picture quality to its fullest potential, make sure that the Comb
Filter Defeat Switch is pressed IN when utilizing the monitor in separated (LCA)
video output. This is the leftmost switch on the back of the monitor as you look
at it from the rear view.
40 - Column
Composite Video (CVBS)/Separted (LCA)
1
80 - Column
Digital RGBI