Overview; Self-Diagnostic Function - Epson Perfection 3200 Photo Service Manual

EPSON Perfection 3200 Photo

3.1 Overview

This chapter describes the responses to errors that are detected by the self-
diagnosis function and check points for each trouble symptom which are necessary
so that troubleshooting can be carried out efficiently when a problem occurs.

3.1.1 Self-Diagnostic Function

This scanner is equipped with a self-diagnosis function that automatically
checks the operation of the various scanner components. The problem that are
detected by this function and the way they are handled them are given below.
Troubleshooting
COMMAND ERROR
Table 3-1. Command error
LED display
Undefined command or
undefined command
parameter received.
(No display)
The error status is reset when a correct command or command
Resetting
parameter is received.
INTERFACE ERROR
Table 3-2. Interface error
LED display
• Wrong procedure is detected in
• In the case of SCSI, a
(Flashes at high speed)
Turn off the scanner and then back on. RST signal in SCSI
Resetting
turns active.
Overview
Cause Solution
• The scanner ignores incorrect
commands and incorrect
command parameters. (Current
settings maintained)
• The scanner returns a NACK and
waits for the next command
parameter.
Cause
the interface communication.
Indicator turns off
and operation stops.
transmission is frozen more than
30 seconds except BUS FREE
phase.
Revision A
Solution
25