Memory (Main Menu Selection 1) - NCR PC4i Service Manual

SYSTEM OVERVIEW
flexible disk drives and 256 KB memory
o A 12-inch color display with Videotex, 1 flexible
disk drive and 1 fixed disk drive, and 256KB
memory
The Videotex systems are dual purpose systems, to be
used either as a Videotex system, or as a normal
personal computer. These systems are tailored to meet
individual country requirements, for example
Bildschirmtext for Germany, Teletel for France, and
Prestel for Great Britain.
1-4
VARRiliG
Disconnect the power cable before removing
the cabinet. Dangerous voltages are present
when working on the computer with the cabi-
net removed.
ONL
y
TRAINED ENGINEERS AND NCR TRAINED SER-
C
VICE PERSONNEL SHOULD ATTEMPT TO WORK ON THE
COMPUTER WITH THE CABINET REMOVED AND THE
POWER ON.
It is recommended that the first operation
after removing the cabinet should be to dis-
charge CRT anode voltage.
CAUTION
Electrostatic discharge can cause damage to
some components used in the computer. Where
possible,
work
in a static free area and use
special wrist-ground straps. Avoid touching
the components and circuit paths, handle
printed circuit boards by their edges. The
construction technique (multi-layer) used on
some PC boards makes the soldering compo-
nents extremely difficult, therefore such
work should only be undertaken by a field
engineer who is experienced in repairing