EPSON Stylus PHOTO 810/820/830

Revision B

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.

STARTUnit level troubleshootingUnit repairAssemble & AdjustmentENDFigure 3-1. Troubleshooting flowchart
Table 3-1. Motor, coil resistance

Motor

Location

Check point

Resistance

 

 

 

 

CR motor

CN12

Pin 1 and 3

7.8 Ohms ± 10%

Pin 2 and 4

(at 25 ° C/ phase)

 

 

 

 

 

 

 

 

 

6.0 Ohms ± 10% *1

PF motor

CN7

Pin 1 and 3

(at 25 ° C/ phase)

Pin 2 and 4

5.4 Ohms ± 10% *2

 

 

 

 

 

(at 25 ° C/ phase)

 

 

 

 

*1 : Stylus Photo 810/820

*2 : Stylus Photo 820/830

Table 3-2. Sensor check point

Sensor name

Check point

Signal level

 

Switch mode

 

 

 

 

 

 

 

Off

 

 

Less than 0.7V

• Out of CR home

 

 

 

position

 

 

 

 

HP/PE Sensor

CN4/Pin 1 and 2

 

No paper

 

 

 

 

On

 

 

 

 

 

More than 2.4V

Within CR home

 

 

 

position

 

 

 

 

 

 

 

Detect the paper

 

 

 

 

 

Thermistor

TH1 (on the Head

Analog signal

 

10 K (at 25 ° C)

(THM)

driver board)

 

 

 

 

 

 

 

 

 

Troubleshooting

Overview

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