Texas Instruments TI-86 - Manual (Page 29)

Chapter 1: Operating the TI -86 17
01OPER.DOC TI-86, Chap 1, US English Bob Fedorisko Revised: 02/13/01 2:18 PM Printed: 02/13/01 2:59 PM Page 17 of 22 01OPER.DOC TI-86, Chap 1, US English Bob Fedorisko Revised: 02/13/01 2:18 PM Printed: 02/13/01 2:59 PM Page 17 of 22
To replace the lithium backup battery, remove the battery cover and unscrew the tiny
screw holding the
BACK UP BATTERY cover in place. Install a new CR1616 or CR1620 battery
according to the polarity (+ and N ) diagram on the cover. Replace the cover and screw.
Turning On and Turning Off the TI-86
To turn on the TI -86, press ^.
♦
If you previously had turned off the calculator by
pressing - ž, the TI -86 clears any errors and
displays the home screen as it was last displayed.
♦
If Automatic Power Down TM (APD TM ) previously had
turned off the calculator, the TI -86 will return as you
left it, including the display, cursor, and any error.
ON
1
0
2 3
6 5 4
ST
,
( (
=
S
U
Y Z
V W RCL
CONS STRNG
BASE TES MEM
: ANS CHAR
O
OFF
CONV
T
P R Q
To turn off the TI -86 manually, press - ž. All settings and memory contents are
retained by the Constant Memory TM feature. Any error condition is cleared.
APD turns off the TI -86 automatically after about four minutes of non-use to extend battery life.
Adjusting the Display Contrast
ᕡ Press and release the yellow - key.
ᕢ Press and hold $ or # (above or below the half-shaded circle).
♦
To darken the screen contrast, press and hold $.
♦
To lighten the screen contrast, press and hold #.
EXIT
x-VAR
MORE
DEL
2nd
ALPHA
x
QUIT
alpha LINK INS
MODE
Properly dispose of the old
battery.
If you release $ or # while
adjusting the contrast, you
must press
- again to
continue the adjustment.