Epson R220 - Stylus Photo Color Inkjet Printer, Service Manual

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EPSON Stylus Photo R220/R230 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.
Table 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 no
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 1-2. Motor, Coil Resistance
Motor Location Check Point Resistance
PF Motor Same as ASF/
Pump Motor
CN6
Pin1 and 3
Pin2 and 4
3.0 Ω ± 10%
(25°C/Phase)
Table 1-3. Sensor Check Point
Sensor Name Location Check Point Signal Level Switch Mode
PE Sensor CN9 Pin1 and 2
More than 2.4V
Off:
No Paper
Less than 0.4V
On:
Paper
PG Sensor CN14 Pin1 and 2
More than 2.4V
Off:
Anywhere of PG
Less than 0.4V
On:
In process of
switching PG
Star Wheel
Sensor
CN11 Pin1 and 2
-
On:
ASF Mode
-
Off:
CDR Mode
CDR Tray
Sensor
CN11 Pin3 and 4
-
Off:
No CDR Tray
-
On:
Detect CDR Tray