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EPSON Stylus COLOR 480
Revision B
Troubleshooting
Overview
52
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
START
Unit level Troubleshooting
Unit repair
Assemble & Adjustment
END
Table 3-1. Motor, Coil Resistance
Motor
Location
Check Point
Resistance
CR Motor
CN2
Pin 1 and 3
Pin 2 and 4
10.8 Ohms
±
10%
(at 25
°
C/ phase)
PF Motor
CN3
Pin 1 and 3
Pin 2 and 4
10 Ohms
±
10%
(at 25
°
C/ phase)
Table 3-2. Sensor Check Point
Sensor Name
Check Point
Signal Level
Switch Mode
HP/PE/IC Sensor
CN1/Pin 1 and 2
Less than 0.7V
Off
• Out of HP range
• No paper
• Detect the I/C
More than 2.4V
On
• Within HP range
• Detect the paper
• Not detects the I/C
Thermistor
(THM)
TH1 (on the Head
driver board)
Analog signal
10 K (at 24
°
C)
Summary of Contents for STYLUS COLOR 480
Page 1: ...EPSON STYLUSCOLOR480 Color Inkjet Printer SEIJ00002 SERVICE MANUAL ...
Page 9: ...C H A P T E R PRODUCTDESCRIPTION ...
Page 31: ...C H A P T E R OPERATINGPRINCIPLES ...
Page 51: ...C H A P T E R TROUBLESHOOTING ...
Page 67: ...C H A P T E R DISASSEMBLYANDASSEMBLY ...
Page 99: ...C H A P T E R ADJUSTMENT ...
Page 121: ...C H A P T E R MAINTENANCE ...
Page 128: ...C H A P T E R APPENDIX ...
Page 144: ...PSON Stylus COLOR 480 Revision B ppendix Parts List 144 ...
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