DR-880 4-4. PATTERN check 4-8. All Lit check fig.lcdencordercheck4.eps fig.lcdencordercheck8.eps Check the text encircled in the illustration. [SONGPATTERN PRESET USER] Verify that there is no inconsistency, missing characters, gaps, or light patches in the LCD. Press [BANK]. Press [BANK]. 4-5. PATTERN No. check 4-9. All Dark check fig.lcdencordercheck5.eps fig.lcdencordercheck9.eps Check the text encircled in the illustration. [8 8 8] Verify that no display elements are lit. Press [BANK]. Press [BANK]. 4-10. Checkerboard pattern check 4-6. TEMPO check fig.lcdencordercheck10.eps fig.lcdencordercheck6.eps Check the text encircled in the illustration.
[8 8 8] fig.lcdencordercheck11.eps Press [BANK]. 4-7. KEY check fig.lcdencordercheck7.eps Verify that the checkerboard pattern is not distorted. fig.lcdencordercheck12.eps Check the text encircled in the illustration. [8 1 #b m] Press [BANK]. Drop the rear edge of the unit (marked [] in the illustration) three times from a height of 5 cm, and verify that there is no abnormality in the display. Press [BANK] to proceed to the next test item. 21