Epson 2070 Service Manual - Page 126

UNIT LEVEL TROUBLESHOOTING, Table 5-5. Symptoms and Problem Descriptions

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Troubleshooting LQ-2070 Service Manual 5.3 UNIT LEVEL TROUBLESHOOTING You may be able to identify the defective unit just from the symptom displayed. The table below provides the symptoms for a number of failures. Once you identify the problem, refer to the flowchart listed in the right-hand column of the table below to determine the cause of the problem. Table 5-5. Symptoms and Problem Descriptions Symptom Abnormal CR Operation Abnormal Paper Feed Abnormal Control Panel Operation Abnormal Printing Problem Description Flowchart No. • Carriage does not move at all. • When the printer is powered on, the CR moves away from home position after a moment and stops. All indicator LEDs on the control panel blink. Flowchart 1 • Paper does not feed at all. Flowchart 2 • When the printer is powered on, paper is ejected Flowchart 2-1 automatically. • When paper is loaded, it is ejected automatically and then the printer indicates "Ready." • Control panel indicator LEDs do not light. • Operate button does not work. • Panel buttons do not operate. Flowchart 3 • No image is printed. • Faulty printing - some dots are not printing. Flowchart 4 5-4 Rev. A

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5.3 UNIT LEVEL TROUBLESHOOTING
You may be able to identify the defective unit just from the symptom displayed. The table below provides the
symptoms for a number of failures.
Once you identify the problem, refer to the flowchart listed in the
right-hand column of the table below to determine the cause of the problem.
Table 5-5. Symptoms and Problem Descriptions
Symptom
Problem Description
Flowchart No.
Abnormal CR
Operation
•
Carriage does not move at all.
•
When the printer is powered on, the CR moves
away
from home position after a moment and stops. All
indicator LEDs on the control panel blink.
Flowchart 1
Abnormal Paper
Feed
•
Paper does not feed at all.
•
When the printer is powered on, paper is ejected
automatically.
•
When paper is loaded, it is ejected automatically and
then the printer indicates “Ready.”
Flowchart 2
Flowchart 2-1
Abnormal Control
Panel Operation
•
Control panel indicator LEDs do not light.
•
Operate button does not work.
•
Panel buttons do not operate.
Flowchart 3
Abnormal Printing
•
No image is printed.
•
Faulty printing — some dots are not printing.
Flowchart 4
Troubleshooting
LQ-2070 Service Manual
5-4
Rev. A