Perfection 4870 Photo Revision A
PRODUCT DESCRIPTION Error-time Processing 17
1.6 Error-time Processing
Table 1-3. Error Definition and Remedy List
Category LED Indication Cause Remedy Recovery
Receivable
Command
Command error None
An undefined command or
undefined command parameter was
detected.
• The scanner ignores the incorrect
command or parameter. (Current
setting maintained)
• The scanner returns NACK and
waits for the next command
parameter.
The error condition is cleared when
the scanner receives a correct
command.
Fatal error
Red LED flashes in
sort interval.
• The lamp is dead.
• The main unit is faulty.
• Firmware downloading failed.
• Turn the lamp off and stop the
operation.
• Set Bit 7 of the status bit.
• Turn the scanner off and then back
on.
• Send the initialization command
(ESC@).
ESC F, ESC f,
ESC @
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