Overview - Epson Stylus PHOTO 890 Service Manual

EPSON Stylus Photo 890/1280/1290

3.1 Overview

This chapter describes how to troubleshoot problems. It consists of the sections shown
in the flowchart below. When identifying and troubleshooting problems, be sure to
proceed to the correct section specified in the flowchart.
Troubleshooting with
LED error indicators
Isolating the defective
parts on the power supply
board
Figure 3-1. Troubleshooting Flowchart
Following sections give detailed information on each step in the flowchart. Be sure to
perform troubleshooting by following the specified steps without omitting any
necessary operations.
Following tables show the checkpoints for each motor and sensor.
TROUBLESHOOTING
START START
Isolating the problem
with exhibited
phenomenon
Table 3-1. Motor Resistance and Measurement Procedure
Motor
CR Motor CN14
PF Motor CN13
ASF/Pump Motor CN15
Table 3-2. Sensor Check and Measurement Procedure
Sensor Checkpoints
PE Sensor CN5, Pin 1 &2
ASF Sensor CN6, Pin 1 &2
Overview
Connector
Check pins Coil resistance
to check
Ω
Pin 1 & 2 29.2
Ω
Pin 1 & 2 29.2
Pin 1 & 3 or Pin
Ω
10.4
2 & 4
Corresponding
Signal level
condition
LOW Paper present
HIGH Paper out
LOW In the ASF home
position
HIGH Out of the ASF home
position
Revision C
+/- 25%
+/- 25%
+/-10%
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