Atari CX 5200 Field Service Manual page 49

P lug a game controller into port
•
Insert the Diagnostic Cartridge (Version 1 . 1 ) .
•
Turn on the T . V. (Select Channel 2 or 3) and the 5200.
•
P ress the * or
key follo wed by the start key to display this menu on the screen.
II
l =Any Video
2 =Color Bars
3 =Gray Bars
4 =Port Test
5 =Pokey Adjust
6 =Tone Test
Test 11 4 and 0 are not used.
To r un the tests press the proper numerical key on the 5200 controller and then press
STA RT. To escape a test (except 11 5), press any key. To escape 115, POKEY ADJ UST,
press the bottom fire button.
The following pages show the tests as they appear with the Port Board plugged in.
If a test indicates a failure, go to the Flowchart Entry Point indicated for that test
and begin troubleshooting.
POWER-UP SCREEN
The power-up screen displays inform ation about the internal status of the unit.
shows:
The type of TIA in the unit.
•
NTSC appears. If P A L appears, replace the GTIA with one from your kit.
The revision level of the ROM in the unit. ( Not important at this time.)
•
If at po wer-up this screen does not appear , one of the follo wing screens appears:
Solid Colored (Black) Screen or Vertically L ined S cr een
•
Sno wy Screen
•
Warped - Ragged Picture
•
Proceed to the description of that failure which follows.
C X5200 Field Service Manual
1
7 =Ram Test
8 =Verify OS ROM
9 =Display Options
O =Examine
If the GTIA is the proper one for the unit,
3A-2
of the 5200.
I t