Overview - Epson Stylus PHOTO 1270 Service Manual

EPSON Stylus Photo 870/1270

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 CN7
Table 3-2. Sensor Check and Measurement Procedure
Sensor Checkpoints
PE Sensor CN4, Pins 1 &2
ASF Sensor CN6, Pins 1 &2
Overview
Connector
Check pins Coil resistance
to check
Ω
Pins 1 & 2, 31.1
Ω
Pins 1 & 2, 31.1
Pins 1& 3 or
Ω
10.4
Pins 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 B
+/- 25%
+/- 25%
+/-10%
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