Overview; Self-Diagnostic Function - Epson Perfection 1200U Service Manual

EPSON Perfection1200

3.1 Overview

This chapter explains the troubleshooting of this scanner.

3.2 Self-Diagnostic Function

The self-diagnostic function of this scanner lets the scanner to check the
condition of each component automatically. If it detects a faulty component, it
indicates the status using the Operate light. See Table3-1.
Troubleshooting
Table 3-1. Self-Diagnostic Indication
LED Light
Green Red
Command Error
• Cause: Unidentified command is detected.
• Disposition: The scanner ignores the wrong command or
parameter. (Therefore, the current settings or the default
ON ON
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.
Interface Error
• 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.
OFF Blink • 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
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
OFF Blink
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 @]
Option Error
(Only when the optional unit is installed and operation is
available by [ESC e].)
• Cause: Unit cover open, or paper Empty
Blink Blink
• Disposition: The bit 7 of the status byte is set to "1".
• Remedy:Remove the error condition.
• Acceptable command:[ESC F, ESC f, ESC @]
Overview
Revision B
Error Type (Cause, Remedy)
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