EC-4044  (650-0808)            Troubleshooting         Faxback Doc. # 3484

If you have difficulty operating the calculator, you may be able to
correct the problem without returning the calculator for service.  The
following table lists several problems and their possible solutions.  If
these solutions do not correct the problem, contact your local Radio Shack
store.

Possible           Difficulty                Solution
Solutions

                   The calculator display    Look for a number base
                   results that seem         designator that accompanies
                   incorrect.                nondecimal results, or check
                                             the number base indicator.
                                             Try scrolling to part of the
                                             number that may be past the
                                             the display, especially in a
                                             complex result.  Also try
                                             removing any fixed decimal
                                             setting.

                   Trig functions and        Be sure the correct angle
                   polar/rectangular         units are selected-
                   conversions do not        degrees, radians, or grads.
                   give the correct
                   results.

                   The calculator            Be sure the calculator is not
                   produces hexadecimal      set to the hexadecimal
                   digits when you           number base.
                   attempt to enter
                   square, square root,
                   or trig functions.

                   An error occurs.          Check the error conditions
                                             listed in Appendix A.

                   The calculator            If a lengthy integration is
                   keyboard does not         in progress, the display may
                   respond to key            be blank for a noticeable 
                   presses                   duration.  If you are not 
                                             integrating, try pressing
                                             2nd [OFF] and then press
                                             [ON].  You can also try
                                             removing the battery and 
                                             reinserting it.

                   You also should review the operating instructions in
                   this guidebook to be sure that you are performing the
                   calculations correctly.

(br/all-12/08/94)