Color Inkjet Printer Service Manual

EPSON Stylus Photo R300/R310 Revision A
TROUBLESHOOTING Overview 8
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.
Figure 1-1. Troubleshooting Flowchart
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.
START
UNIT-LEVEL TROUBLESHOOTING
UNIT REPAIR
ASSEMBLY AND ADJUSTMENT
END
Table 1-1. Motor, Coil Resistance
Motor Location Check Point Resistance
PF Motor
(Same as ASF/
Pump Motor)
CN9
Pin 1 and 3
Pin 2 and 4
3.0Ω ±10%
(25°C/phase)
Table 1-2. Sensor check point
Sensor name Location Check point Signal level Switch mode
PE Sensor CN4 Pin 1 and 2
More than 2.4V
Off :
No paper
Less than 0.4V
On :
Detect paper
PG Sensor CN5 Pin 1 and 2
More than 2.4V
Off :
Anywhere of PG
Less than 0.4V
On :
In process of
switching PG
Star Wheel
Sensor
CN6 Pin 1 and 2
-
On :
ASF mode
-
Off :
CDR mode
CDR Sensor CN6 Pin 3 and 4
-
Off :
No CDR Tray
-
On :
Detect CDR Tray