Overview; Error Indications And Fault Occurrence Causes - Epson Stylus CX4900 Service Manual

EPSON Stylus CX4900/CX4905/CX5000/DX5000/DX5050/CX5900/CX6000/DX6000/DX6050

3.1 Overview

This chapter describes unit-level troubleshooting. 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.
Unit-level troubleshooting
Assemble & Adjustment
Figure 3-1. Troubleshooting flowchart
Table 3-1. Motor, coil resistance
Motor Location
Scanner motor CN10
Note : Since CR Motor and PF Motor are DC motors, the resistance among the electric poles
varies. Therefore, judge if it is normal or abnormal based on if there is operation of the
motor or not; the resistance values cannot be used to judge the abnormality. However, it
is difficult to judge accurately, if it is not clear, replace the motor.
TROUBLESHOOTING
START
Unit repair
END
Check point Resistance
Pin 1 and 3
±
37Ω
Pin 2 and 4
Sensor name
PE Sensor
PG Sensor
Scanner HP Sensor
3.2 Error Indications and Fault Occurrence
Causes
This section describes the LED indications, STM3 messages and fault occurrence
causes at occurrence of the following errors during any sequence/operation (e.g.
power-on sequence, paper feeding/loading sequence, ink sucking sequence).
NOTE: The STM3 windows shown in the table in the following pages are the
ones of Stylus CX4900/CX4905/CX5000/DX5000/DX5050, however,
other models show almost the same displays as those except the following
10%
items:
1) Printer model name
2) Printer external view (panel part)
Overview
Table 3-2. Sensor check point
Check point Signal level
Less than 0.4V
CN3 / Pin 1 and 2
More than 2.4V
CN4 / Pin 1 and 2 —
CN13 / Pin 1 and 2 —
Revision A
Switch mode
Off: No paper
On : Detect the paper
On : PG large
Off: PG normal
On : Within Scanner Carriage
home position
Off: Out of Scanner Carriage
home position
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