Epson Stylus Photo 925, Service Manual

Page: 51 / 167

EPSON Stylus Photo 925 Revision A
Troubleshooting Overview 51
3.1 Overview
This chapter describes how to identify troubles in two levels: unit level repair and
component level repair. Refer to the flowchart in this chapter to identify the defective
unit and perform component level repair if necessary. This chapter also explains motor
coil resistance, sensor specification and error indication.
Figure 3-1. Troubleshooting Flowchart
START
Unit level Troubleshooting
Unit repair
Assemble & Adjustment
END
Table 3-1 Motor, Coil Resistance
Motor Location Check Points Resistance
ASF Motor
CN11 Pin1 and 3
Pin2 and 4 7.0
Ω±
10%
(25
°
C/phase)
Table 3-2 Sensor Check Points
Sensor Name Check Points Signal Level Switch Mode
PE Sensor CN18/Pin1 and 2
2.4V more than
0.7V less than ON: There is paper
OFF: No paper
CT Sensor
CN15/Pin4 and 5
2.4V more than
0.7V less than ON: Cutter CR present
OFF: Cutter CR absent
CN15/Pin1 and 2