Casio LX-551AQ, Service Manual & Parts List

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3. GENERAL GUIDE
3-1. Outward
3-2. About data errors
Whenever you switch on the power of the SF Unit, it performs a self-check before beginning
operation. If the SF Unit detects a problem with the data stored in memory, it displays the following
message.
DATA ERROR!
CONSULT
THE OWNER'S
MANUAL
CAPS
Note that once data is lost it cannot be recovered. Such data errors are generally caused by one of
the following problems.
• Interruption of battery power.
• Severe electrostatic charge, impact, change in temperature, or change in humidity.
• Hardware problem.
Once the Data Error display appears, you will not be able to input or edit data, though you will be able
to recall data after pressing CLEAR to clear the error message. In order to return memory to normal
(allowing further input and editing of data), you must perform the RESET operation to clear the
memory of all data. Before doing so, you may want to recall important data and write it down (if you
don't already have a copy). You can then re-input the data after clearing the memory.
3-3. About the memory overflow message
The memory overflow message appears on the display when the data you are trying to store exceeds
memory capacity.
When this happens, perform the two following operations.
• Press or to display the data you are trying to input, and reduce the number of characters.
If the memory overflow message appears again when you try to store the data, try the next
operation below.
• Press CLEAR to display the input prompt for the mode you are in ("NAME?" "MEMO?"). Next,
delete data items you no longer need to make room for the new data.
Display
Mode Keys
Power OFF
Key
Power ON/
Clear Key
Connector
Terminal
Lock
Numeric Keys
Cursor Keys
Keyboard