Epson R310 service manual Troubleshooting Flowchart Motor, Coil Resistance, Sensor check point

EPSON Stylus Photo R300/R310 Revision A

1.1 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.

START

UNIT-LEVEL TROUBLESHOOTING

UNIT REPAIR

ASSEMBLY AND ADJUSTMENT

END

Figure 1-1. Troubleshooting Flowchart

Table 1-1. Motor, Coil Resistance

Motor	Location	Check Point	Resistance
PF Motor		Pin 1 and 3	3.0Ω ±10%
(Same as ASF/	CN9
		Pin 2 and 4	(25°C/phase)
Pump Motor)

Since "CR Motor" and APG Motor are DC motors, the resistance among the electric poles varies. Therefore, judge if it is normal or abnormal based on if there is operation of the motor or not; the resistance values cannot be used to judge the abnormality. However, it is difficult to judge accurately, if it is not clear, replace the motor.

Table 1-2. Sensor check point

Sensor name	Location	Check point	Signal level	Switch mode
			More than 2.4V	Off :
PE Sensor	CN4	Pin 1 and 2		No paper
			Less than 0.4V	On :
				Detect paper
			More than 2.4V	Off :
				Anywhere of PG
PG Sensor	CN5	Pin 1 and 2
				On :
			Less than 0.4V	In process of
				switching PG
			-	On :
Star Wheel				ASF mode
	CN6	Pin 1 and 2
Sensor
			-	Off :
				CDR mode
			-	Off :
				No CDR Tray
CDR Sensor	CN6	Pin 3 and 4
			-	On :
				Detect CDR Tray

TROUBLESHOOTING Overview 8