EC-4037  (650-0805)           Batteries                Faxback Doc. # 3478

This unit is powered by four AAA-size (LR03 AM4) or UM-4) batteries.  In
addition, it uses a single CR2032 lithium battery as a back up power
supply for the memory.

When to Replace Batteries

Replace batteries when the display of the calculator becomes dim and
difficult to read, even if you adjust the contrast (page 26) to make
it darker.

If the following message appears on the display, immediately stop using
the calculator and replace batteries.  If you try to continue using the
calculator, it will automatically switch power off, in order to protect
memory contents.

You will not be able to switch power back on until you replace batteries.

                      ** Low Battery!**

Be sure to replace batteries at least once every two years, no matter how
much you use the calculator during that time.

WARNING:  If you remove both the main power supply and the memory back up
          batteries at the same time, all memory contents will be erased. 
          Be sure to read the following section before doing anything.

Replacing Batteries

  Be sure that you have back up copies of all memory contents before
  replacing batteries.

  Never remove the main power supply and the memory back up batteries at
  the same time.  Doing so will erase the contents of the memory.

  Be sure that the calculator is switched off whenever you replace
  batteries.  If you calculator is on, data stored in memory might be
  erased.

  Never switch the calculator on while batteries are not loaded or while
  the battery holder is not in place.  Doing so will erase the contents
  of the memory.

Precautions:  Incorrectly using batteries can cause them to burst or leak,
              possibly damaging the interior of the unit.  Note the
              following precautions:

              Be sure that the positive + and negative - poles of each
              battery are facing in the proper directions.

              Never mix batteries of different types.

              Never mix old batteries and new ones.

              Never leave dead batteries in the battery compartment.

              Remove the batteries if you do not plan to use the unit
              for long periods.

              Never try to recharge the batteries supplied with the unit.

              Do not expose batteries to direct heat, let them become
              shorted, or try to take them apart.

(Should a battery leak, clean out the battery compartment of the unit
immediately, taking care to avoid letting the battery fluid come into
direct contact with your skin.)

Keep batteries out of reach of small children.  If swallowed, consult with
a physician immediately.

To replace the main power supply batteries 

1.  Switch the power of the calculator off.

2.  Slide the battery compartment cover on the back of the unit in the
    direction indicated by the arrow.

3.  Slide the switch on the battery holder to the OPEN side 

4.  Remove the four old batteries.

5.  Wipe off four batteries with a soft, dry cloth.  Load them into
    the calculator so that their positive + and negative - ends are facing
    properly.  Be sure to replace all four batteries with new ones.

6.  Replace the battery holder and fasten it in place.  Slide the switch
    back (LOCK side).

7.  Replace the battery compartment cover, sliding it in the direction
    opposite that indicated by the arrow.

Important

  Never remove the main power supply and the memory back up batteries from
  the unit at the same time.

  Be sure to switch the unit off before replacing batteries.  Replacing
  batteries with power on will cause data in memory to be deleted.

  Never switch power on while main power batteries are removed from the
  unit or while the battery holder is not securely in place.  Doing
  so might cause data in memory to be deleted.

  Be sure to replace all four batteries with new one.

To replace the memory back up battery

1.  Switch the power of the calculator off.

2.  Slide the battery compartment cover on the back of the unit in the
    direction indicated by the arrow.

3.  Remove screw A from the battery holder.

4.  Remove the old battery.

5.  Wipe off the surface of a new battery with a soft, dry cloth.  Load
    it into the calculator so that its positive + side is facing up.

6.  Replace the battery holder and fasten it in place with screw A.

7.  Replace the battery compartment cover, sliding in the direction
    opposite that indicated by the arrow.

8.  Switch the power of the calculator on the check for proper operation.

Important

  Before replacing the memory backup battery, switch on the unit and
  check to see if the "Low Battery" message appears on the display.  If
  it does, replace the main power supply batteries before replacing
  the back up power supply battery.

  Never remove the main power supply and the memory back up batteries from
  the unit at the same time.

  Be sure to switch the unit off before replacing batteries.  Replacing
  batteries with power on might cause data in memory to be deleted.

  Be sure to replace the back up power supply battery at least once a
  year, regardless of how much you use the unit during that time.  Failure
  to do so might cause data in memory to be deleted.

About the Auto Power Off Function

The calculator switches power off automatically if you do not perform
any key operation for about 6 minutes.  To restore power, press AC/ON.

(LB/all-12/07/94)