Texas Instruments PLUS TI-89 - Manual (Page 595)

578 Appendix C: Service and Warranty Information
8992APPC DOC TI-89 / TI-92 Plus: Appendix C (US English) Susan Gullord Revised: 02/23/01 1:56 PM Printed: 02/23/01 4:30 PM Page 578 of 8 8992APPC.DOC TI-89 / TI-92 Plus: Appendix C (US English) Susan Gullord Revised: 02/23/01 1:56 PM Printed: 02/23/01 4:30 PM Page 578 of 8
1. If the TI -92 Plus is on, turn it off (press 2 ®) to avoid loss of
information stored in memory.
2. Holding the TI -92 Plus unit upright, slide the latch on the top of the
unit to the left unlocked position; slide the rear cover down about
one-eighth inch and remove it from the main unit.
I / O
3. Remove all four discharged AA batteries.
4. Install four new AA batteries as shown on the polarity diagram
located in the battery compartment.
5. Replace the rear cover, and slide the latch on the top of the
TI -92 Plus to the locked position to lock the cover back in place.
6. Turn the TI -92 Plus on, and adjust the display contrast, if
necessary.
To replace the lithium backup battery, remove the back cover from
the unit and unscrew the tiny screw holding the lithium battery cover
in place.
Remove the old battery and install a new CR2032 , positive (+) side
up. Replace the cover and the screw.
Replacing the
Alkaline Batteries in
the TI-92 Plus
Replacing the
Lithium Battery in
the TI-92 Plus
Slide to open. top
AA alkaline batteries
Lithium battery