45

Atari American Laser Games

SURFACE SCAN

FRAME: 00379

FAILURES: 00000

PRESS SERVICE: DONE

This screen shows information from a software routine in MDII versions 2.02 and up. Its purpose is to aid in evaluating questionable laser disk players.

The DISK SIZE value is the highest frame number that could be read by the player from the disk during a search algorithm. The TEST NUMber represents the number of times through a sequence of operations. The text in the oval-shaped box (SEARCH START) is the operation which the "disk exerciser" software is currently commanding the LDP to perform. The 3-digit number to the right is the number of failures logged for that particular test. Tests commanded are:

SEARCH START SEARCH END PLAY

REVERSE PLAY FAST PLAY FAST REVERSE

PAUSE

FORWARD STEP REVERSE STEP SEARCH PAUSE

TESTS COMPLETE

The text in the lower square box appears briefly at the end of each cycle of tests. Press either START switch to clear failure counts. The bottom FAILURES count line is a composite count of failures of all types of commanded LDP operations.

Press the SERVICE switch to exit to a SURFACE SCAN test screen.

The SURFACE SCAN screen shows the progress and results of software which commands the laser player to search to each and every frame number on the laser disk. This test is intended to identify any unreadable or inaccessible frames on the disk.

This test requires about 4 1/2 hours to completely scan the disk, but it may be interrupted any time by pressing the SERVICE switch.

If the "disk exercise" or surface scan test report errors, likely causes include:

□ Dust on the disk and/or the player lenses

□ Fingerprints or scratches on the disk

□ Sluggish/sticky LDP head positioning mechanism (clean/lubricate shaft per Sony recommendations)

□ Out-of-alignment laser player optics

□ Warped or otherwise damaged disk

Pressing the SERVICE switch returns to the top-level SERVICE MENU.

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