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Operating the TI-80 1-3
The brightness and contrast of the display depend on room lighting, battery
freshness, viewing angle, and the adjustment of the display contrast. The
contrast setting is retained in memory when the TI
.
80 is turned off.
You can adjust the display contrast to suit your viewing angle
and lighting conditions. As you adjust the contrast setting, the
display becomes lighter or darker. A highlighted number in the
upper right corner changes to indicate the current contrast
setting; 0 is the lightest, and 9 is the darkest.
To adjust the display contrast:
1. Press and release the
2
key.
2. Use one of two keys:
¦
To increase the contrast (darken the screen), press and
hold
7
.
¦
To decrease the contrast (lighten the screen), press and
hold
8
.
Note: The display may become completely blank if you adjust
the contrast setting too low. If this happens, press and release
y
, and then press and hold
7
until the display reappears.
As you use the TI
-
80, the battery voltage will gradually drop,
and the display will dim. You can adjust the contrast to darken
the display when this happens. If the display is dim and
adjusting the contrast to level 9 does not make it dark enough,
you should replace the batteries. Refer to Appendix B for
instructions on how to change the batteries.
Note: After you change batteries, the display contrast may
appear very dark. Press and release
y
, and then press and
hold
8
to lighten the display.
Setting the Display Contrast
Adjusting the
Display Contrast
When to Replace
Batteries