File name sc400_5.pdf

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 (C206 PSB/PSE) Unit Repair (C206 Main) Unit Repair Printer Mechanism Disassemble and Adjustment END Figure 5-1. Troubleshooting Process Flowchart Table 5-1. Motor Resistance and Measurement Procedure Motor Name CR Motor PF(Pump) Motor Location CN6(C206 MAIN) CN7(C206 MAIN) Check Point 1-pin & 3-pin, 2-pin & 4-pin 1-pin & 3-pin, 2-pin & 4-pin Resistance 7.8 Ohms ±10% 7.8 Ohms·}10% Table 5-2. Sensor Check Sensor Name Paper end sensor Carriage home position sensor ASF phase Sensor Black cartridge sensor Color cartridge sensor Thermistor Check Point CN4 / 1-pin, 2-pin CN5 / 1-pin, 2-pin Signal Level Open: less than 0.7 V Close: more than 2.4 V Open: less than 0.7 V Close: more than 2.4V Open: less than 0.7 V Close: more than 2.4 V On: 0 V Off: more than 2.4 V On: 0 V Off: more than 2.4 V Analog data Sensor Status Paper exit No paper Home position Out of home position Home position Out of home position Black cartridge out Black cartridge exit Color cartridge out Color cartridge exit Change the VH voltage of charge pulse for common driver circuit CN11 / 1-pin, 2pin CN8 / 1-pin, 18pin CN8 / 2-pin, 18-pin CN8 / 3-pin, 18-pin Rev. A 5-1 Chapter 5 Troubleshooting Table 5-3. Printer Condition and Panel Status Indicators Error status Power Paper Out Paper jam condition No Ink cartridge or Ink en