1 troubleshooting – Epson 440 User Manual

Page 82

EPSON Stylus Color 440/640/740

Revision A

Chapter 3

Troubleshooting

3.1 Troubleshooting

The printer may exhibit different symptoms for the same problem, which
makes troubleshooting more difficult. This section, however, provides
simple and effective ways to facilitate troubleshooting.

The following flowchart illustrates the main steps of the trouble shooting
process.

Figure 3-1. Troubleshooting Process Flowchart

Table 3-1. M otor Resistance and M easurem ent Procedure

* Main board refers to the following:

Stylus Color 440: C206Main-B, C255Main
Stylus Color 640: C256Main
Stylus Color 740: C257Main

See the following page for Table 3-2, “Sensor Check” and Table 3-3,
“Printer Condition and Panel Status”.

START

END

Unit Level Troubleshooting

Unit Repair
(PSB/PSE)

Unit Repair
(Main board)

Disassemble and Adjustment

Unit Repair

(Printer Mechanism)

Motor Name

Location

Check Point

Resistance

CR Motor

• Stylus Color 440/640

CN6 (Main board *)

• Stylus Color 740

CN7 (Main board *)

Pins 1 & 3,

Pins 2 & 4

7.8 Ohms

10%

PF (Pump) Motor