POWER-UP
SCREEN
The Power-up screen appears in
a
few seconds.
It
displays information about the inner
workings of the unit. This screen shows:
a
The type of TIA in the unit.
NTSC
appears if the
GTlA
is the proper one
for that unit. If PAL appears, replace with
a
GTIA from your kit.
0
The rev of
ROM
in the unit. (Not important
at
this time.)
After the initial power-up, this screen do& not automatically appear again.
One
of
the following indicates
a
failure.
a
Solid Colored (Black) Screen or Vertically Lined Screen
a
Snowy Screen
a
WARPED
-
Ragged Picture
Solid
Colored
(Black)
Sueen
or
Vertically
Lined
keen
If
a
solid colored
(Black)
or
vertically lined screen appears, the unit
is
suffering
a
catastrophic failure.
This means that the unit is not functioning well enough
to
even
put
up
a
simple display.
Diagnostic Flowchart Entry Point:
4-2.
Snowy
Screen
If, when turned on the unit displays no modulation on the screen, the failure is
probably in the power circuitry.
However, first check the following:
a
Check that the select switch on the switchbox is set to the
NORMAL
position.
Check the power adaptor using
a
standard voltmeter.
Diagnostic Flowchart Entry Point:
Pg.
4-9.
CX5200
Field Service Manual
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