Epson AcuLaser C8500 Service Manual page 483

EPSON AcuLaser C8500
6.1.2 Description of the On-site Service
This section gives instruction on the on-site service in detail.
PRELIMINARY CHECK
1. Ask the users the following:
How often paper feed malfunction occurs.
How the printer is used. (paper, volume, environment, etc.)
Output quality (each side: front/back separately)
2. Check safety matters: the condition of plug connections, the
damage for plugs and codes.
3. Print a status sheet to check the printer condition.
4. Print an engine status sheet. Check the life of the Consumables,
Regularly Replaced Parts, and Main After Sales Parts, and the
printer's condition.
REAPPEARANCE OF THE TROUBLE
Perform troubleshooting described in Chapter 5.
1. Referring to Section 5.1.4,"Self-Diagnostic Function by LCD
Message", identify the trouble and perform necessary
troubleshooting.
2. If necessary, proceed to "Level 1 FIP" and "Level 2 FIP".
3. If a print quality problem (completely blank/black page), a fatal
problem, due to an engine malfunction is identified, go to "Print
quality troubleshooting".
Chapter 6 Maintenance
PRINT QUALITY CHECK
1. Print several pages of monochrome and color status sheet to check
print quality.
<Points to check>
Color balance
Improper color position
Too dark/light printing
Abnormal reappearance at low density
Others
Revision C
6-4