Overview - Epson Stylus Photo 895 Service Manual

EPSON Stylus PHOTO 895/785EPX

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.
Unit level Troubleshooting
Unit repair
Assemble & Adjustment
Figure 3-1. Troubleshooting Flowchart
Troubleshooting
START
END
Table 3-1. Motor, Coil Resistance
Motor Location
CR Motor CN13
PF Motor CN12
ASF Motor CN11
Table 3-2. Sensor Check Point
Sensor Name Check Point
HP Sensor CN4/Pin 1 and 3
PE Sensor CN5/Pin 1 and 3
On the Head driver
Thermistor (THM)
board
Overview
Revision A
Check Point Resistance
Pin 1 and 3
7.8 Ohms 10%
(25 C/ phase)
Pin 2 and 4
Pin 1 and 3
7.8 Ohms 10%
(25 C/ phase)
Pin 2 and 4
Pin 1 and 3 7.8 Ohms 10%
Pin 2 and 4 (25 C/ phase)
Signal Level Switch Mode
OFF
0.7V less than
• HP Out of range
ON
2.4V more than
• Within HP range
OFF
0.7V less than
• No paper
ON
2.4V more than
• Detect paper
Analog signal 10 K (24 C)
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