Repair And Replacement Of The Unit Part - Epson Stylus COLOR 800 Service Manual

5.3 Repair and Replacement of the Unit Part

This section contains the flow charts which are used to isolate the faulty unit by following the flow chart
according to the problem caused during replacing or repairing the unit. You are to identify the faulty unit
based on the primary symptom listed in Table 5-4. Refer to Section 5.4, 5.5 and 5.6 for the information on
the repair at the component level such as PSB/PSE and MAIN board and the printer mechanism.
Symptom
The printer does not operate at all.
CR moves abnormally.
The printer feeds paper abnormally. ‰ After power on sequence, the printer is in the
Printing operation is abnormal.
The control panel does not function
normally.
Rev. A
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Table 5-4. Symptoms and Corresponding Flow Charts
‰ No LED goes on.
‰ LED goes on but the printer mechanism does
not operate at all.
‰ When the printer is powered on, the CR leaves
the home position and a fatal error is indicated.
(The printer makes no abnormal noise.)
‰ When the printer is powered on, the CR motor
immediately starts rotating irregularly and a fatal
error is indicated.
‰ When the printer is powered on, the CR does
not move at all.
paper ejecting motion for about 10 seconds and
indicates the paper jam error.
‰ If the load button is pressed or any paper
loading operation is activated after power on
sequence, the printer loads paper form the ASF
and then indicates the fatal error.
‰ If the load button is pressed or any paper
loading operation is activated after power on
sequence, the fatal error is indicated.
‰ No image is printed.
‰ Faulty printing result (dot missing, uneven
printing)
‰ No LEDs on the control panel goes on.
‰ Buttons on the control panel do not function
normally.
‰ Power on button does not work.
Cause
Troubleshooting
Flow chart
1
2
3-1
3-2
4-1
4-2
5
5-3