Overview; Self-Diagnostic Function - Epson 1240U Service Manual

EPSON Perfection 1240U

3.1 Overview

This chapter describes troubleshooting procedures for this scanner.

3.2 Self-Diagnostic Function

The self-diagnostic function of the scanner lets the scanner itself detect
abnormal conditions. When the scanner detects an abnormality, it
shows an error using the LED. See Table 3-1 for the errors detected by
the self-diagnostic function.
Troubleshooting
Table 3-1. Errors Detected by the Self-Diagnostic Function
LED Condition
Red LED lighting up Command Error
Cause:
Disposition: The scanner ignores the wrong command or
Remedy:
Red LED High Interface Error
speed blinking
Cause:
Disposition: Lamp goes off and scanner stops operating.
Remedy:
Acceptable command: None
Fatal Error
Red LED High
speed blinking Cause:
Disposition:
Remedy:
Acceptable command: [ESC F, ESC f, ESC @]
Overview
Revision A
Error Type (Cause Remedy)
Undefined command or undefined command
parameter is received.
parameter, ( Maintain at current settings.)
Scanner sends NACK, and waits for the next
command or parameter.
Once the correct command is received, the error
condition is cleared.
Detects the wrong action in the communication
procedure.
Turn power off and then turn it on again.
Plug out and in the USB connector.
Lamp is broken.
Power is turned on or command is received
without removing the transportation lock.
Scanner unit fault.
Lamp goes off and the scanner stops
operating.
The bit 7 of the status byte is set.
( After cause is remove )
Switch off the power and turn it on again.
Send initialization command (ESC @).
Plug out and in the USB connector.
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