Error Indication - Epson GT-7000 Service Manual

EPSON GT-7000
C H E C K Be aware that the terminator switch must be set
P O I N T
according to the scanner location on the
"daisy-chain".
Rev. A

1.5.4 Error Indication

When an error occurs, the scanner stops operating and the Operate
light show the type of error.
Table 1-8. Error Indications
Light
Nothing Command Error
• Cause: Unidentified command is detected.
• Disposition: The scanner ignores the wrong
command or parameter. (Therefore, the
current settings or the default value remain
effective) Scanner sends NACK, and waits
next command or parameter.
• Remedy: The error condition is cleared when
the scanner received a correct command.
Red LED blinking Interface Error
(short interval) • 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.
• Turn off the scanner and then back on. RST
signal in SCSI turns active.
• Acceptable command: Nothing
Red LED blinking Fatal Error
• Cause: The lamp is broken. Power is turned
on before removing the transportation screw.
System break down.
• Disposition: The lamp goes off and the
scanner stops operation. The bit 7 of the
status is set.
• Remedy: Turn the scanner off and then back
on. Send ESC@ codes to the scanner.
RESET signal in SCSI turns active. Complete
BUS DEVICE RESET message in SCSI.
• Acceptable command: [ESC F, ESC f, ESC @]
Chapter 1 Product Description
Error Type
11