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Chapter 5
Troubleshooting

5.1 Troubleshooting....................................................................................................5-1
5.2 Unit Level Troubleshooting .................................................................................5-3
5.2.1 Printer does not operate at power on................................................................................... 5-4
5.2.2 Error is detected ..................................................................................................................... 5-5
5.2.3 Failure occurs during printing .............................................................................................. 5-6
5.2.4 Printer does not feed the paper correctly ............................................................................ 5-7
5.2.5 Control panel operation is abnormal.................................................................................... 5-8
5.3 Unit Repair C206 PSB/PSE Board .......................................................................5-9
5.3.1 Unit Repair - C206 Main Board ............................................................................................ 5-11
5.4 Repair of the Printer Mechanism.......................................................................5-13
EPSON Stylus Color 400 Service Manual

5.1 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.

START

Unit Level Troubleshooting

Unit Repair Unit Repair Unit Repair
(C206 PSB/PSE) (C206 Main) Printer Mechanism

Disassemble and Adjustment

END
Figure 5-1. Troubleshooting Process Flowchart

Table 5-1. Motor Resistance and Measurement Procedure
Motor Name Location Check Point Resistance
CR Motor CN6(C206 MAIN) 1-pin & 3-pin, 7.8 Ohms