Atari 130XE Service Manual page 41

PRODUCTION TEST - tests performed then in turn, the transition to the next requires
pressing the any key, i.e. space bar. Please follow the instructions on the green box at the
bottom of the screen.
AUDIO tests Pokey sound channels (see below).
Audio Test listen for 6 pure tones, followed by a noise "buzz". Adjust TV or Monitor volume
if necessary. If a tone is missing or the sound is bad, make note of it. The test is repeat until
space bar is pressed. The 6 tones are produced by POKEY chip. The buzz is produced by
GTIA.
VIDEO
1. The display has 3 parts (see Fig. 3-8 Video Test display). The top half of the screen
shows the 9 color registers representing the players, missiles, and playfields against a
gray background. The middle of the screen shows 4 players and 4 missiles (one color)
moving up and down 1 scan line. The bottom of the screen shows a color tuning bar.
130XE Personal Computer
Field Service Manual
Figure 3-7. AUDIO Test Screen
3-5