Epson Stylus Color 440 Service Manual

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting
68
3.1 Troubleshooting
The printer ma
y
exhibit different s
y
mptoms for the same problem. Start
with
Table 3-4
to locate the appropriate flowchart, and then use the
flowchart to identif
y
a problem based on its s
y
mptoms. Refer to the
tables at the end of this chapter for detailed information on testin
g
and
repairin
g
printer components.
The followin
g
fi
g
ure illustrates the main steps of the troubleshootin
g
process.
Fi
g
ure 3-1. Troubleshootin
g
Process Flowchart
3.1.1 Component Test Specifications
The followin
g
tables specif
y
the values at which the CR motor, PF
motor, and sensors should test. In addition, Table 3-3 shows how to
interpret the printer’s LED error indicators.
Table 3-1. Motor Coil Resistance
* Main board refers to the following:
Stylus Color 440: C206 Main-B or C255 Main
Stylus Color 640: C256 Main
Stylus Color 740: C257 Main
START
END
Unit-Level Troubleshooting
Power Supply
Repair
Main Board
Repair
Reassembly and Adjustment
Printer Mechanism
Repair
Motor Name Location Check Point Resistance
CR motor • St
y
lus Color 440/
640 CN6
(
Main
board *
)
•St
y
lus Color 740
CN7
(
Main board
*
)
Pins 1 & 3,
Pins 2 & 4
7.8 Ohms
±
10%
PF
(
pump
)
motor
•St
y
lus Color 440/
640 CN7
(
Main
board *
)
•St
y
lus Color 740
CN8
(
Main board
*
)
Pins 1 & 3,
Pins 2 & 4
7.8 Ohms
±
10%

Epson Stylus Color 440 Specifications

General

Brand	Epson
Model	Stylus Color 440
Category	Printer
Language	English