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EPSON Stylus PHOTO 810/820/830 Revision B
Troubleshooting Overview 60
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
*1 : Stylus Photo 810/820
*2 : Stylus Photo 820/830
START
Unit level troubleshooting
Unit repair
Assemble & Adjustment
END
Table 3-1. Motor, coil resistance
Motor Location Check point Resistance
CR motor CN12
Pin 1 and 3
Pin 2 and 4
7.8 Ohms
±
10%
(at 25
°
C/ phase)
PF motor CN7
Pin 1 and 3
Pin 2 and 4
6.0 Ohms
±
10% *1
(at 25
°
C/ phase)
5.4 Ohms
±
10% *2
(at 25
°
C/ phase)
Table 3-2. Sensor check point
Sensor name Check point Signal level Switch mode
HP/PE Sensor CN4/Pin 1 and 2
Less than 0.7V
Off
• Out of CR home
position
• No paper
More than 2.4V
On
• Within CR home
position
• Detect the paper
Thermistor
(THM)
TH1 (on the Head
driver board)
Analog signal 10 K (at 25
°
C)