Section 2: Specific Features Of The Hp-33E; Self-Check Routine - HP -33E Owner's Handbook Manual

Section 2
Specific Features of the HP-33E
Most of the features found on the HP-33E are discussed in Solving
Problems With Your Hewlett-Packard Calculator. However, several
features unique to the HP-33E (or new to HP calculators) are discussed
in the following pages.
Self-Check Routine
Your new Hewlett-Packard calculator is loaded with features that make it
easy to use and give you confidence that the answers you calculate are
right, every time. The self-check routine, a feature found on many
sophisticated electronic instruments and computers, was designed for
just those reasons. We don't expect you to ever have a problem with
your calculator, but if you think that it isn't operating properly, try this:
Keystrokes Display
-8,8,8,8,8,8,8,8,8,8
The display shown above will appear if your calculator is operating
properly. Press any key to clear the display back to zero. If your
calculator is not operating properly, your display will show EZrror @
or an erroneous display. This tells you that a problem exists in the
calculator's circuitry and you should send it in for service (refer to
Shipping Instructions in this owner's handbook). Pressing any key will
replace the Zrror © in the display with a number that tells a Hewlett-
Packard Service Engineer which circuit in the calculator is at fault.
That's right, the calculator not only tells you it's having problems, it
tells us where the problem is, so we can fix it as quickly and inexpen-
sively as possible and return it to you without delay.
Note: Using the self-check routine causes all memory to be
cleared, including the stack, data registers, and program
memory.
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