Process When An Error Happens - Epson Perfection 1200U Service Manual

EPSON Perfection1200

1.6 Process when an error happens


Command error


Cause: Unidentified command or unidentified command
parameter is detected.


Disposition: The scanner ignores the wrong command or parameter.
(Therefore, the current setting or the default value remain
effective.)
Scanner sends NACK, and waits for the next command or
parameter.


Indicator: Red LED ON


Remedy: The error condition is cleared when the scanner receives
a correct command.

Interface error (Communication error)


Cause: Wrong procedure is detected in the interface
communication. In the case of SCSI, a transmission is
frozen more than 30 seconds except BUS FREE phase.


Disposition:The lamp goes off and the scanner stops operation.


Indicator: READY LED Off
ERROR LED (red) blinking (short interval)


Remedy: Turn the scanner off and then back on. RST signal in SCSI
turns active.


Acceptable command : Nothing

Fatal error


Cause: The lamp is broken. Power is turned on before removing
the transportation screw.


Disposition: The lamp goes off and the scanner stops operation.
The bit 7 of the status byte is set.


Indicator: READY LED Off
ERROR LED Blinks
Product Description


Remedy:


Acceptable command: ESC F, ESC f, ESC @

Option error:
This error occurs by the following causes, when an optional unit is installed
and its operation is available by the optional control command (ESC e).


Cause:


Disposition:The bit 7 of the status byte is set to "1"


Indicator:


Remedy:


Acceptable command: ESC F, ESC f, ESC @
Process when an error happens
Turn the scanner off and then back on. Send ESC@
code to the scanner. RESET signal in SCSI turns active.
Complete BUS DEVICE RESET message in SCSI.
Unit cover open
Paper Empty
READY LED Blink
ERROR LED Blink
Remove the error condition
Revision B
17