Printronix L1024, Maintenance Manual

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13–17 Chapter 13 – Troubleshooting Guide
2. If there is no signal, replace the L.V.P.S.
A. If the solenoid still does not function after replacing the L.V.P.S.,
replace the Engine Controller Board.
d. The transfer charger is not moving freely and must be replaced.
512. There is no charge on the transfer corona.
a. Make sure the transfer corona wire is not broken.
b. Make sure the contact between the H.V.P.S. and the transfer corona is good.
1. Clean toner or paper dust from the transfer corona contact and the H.V.P.S.
spring.
2. Clean off any corrosion on the transfer corona contact.
3. If the spring for the H.V.P.S. contact is compressed, lengthen it by pulling the
top of it. This helps ensure gooid electrical contact. Make sure to pull the
spring upward, not at an angle.
c. Check the charge from the H.V.P.S. according to the procedure in Chapter 8, Power
Supplies, and replace the power supply if the charge is not present.
d. If the charge is not present after step c, replace the L.V.P.S.
e. If the charge is not present after step d, replace the Engine Controller Board.
f. If there is still no charge present, check all wire harnesses.
Follow the steps below if there is no developed image on the OPC drum:
513. The OPC drum has the proper charge, but is not discharging properly.
a. The OPC drum is no longer sensitive to light and is not discharging when the laser
beam strikes it. Replace the OPC drum.
This usually occurs after the OPC drum unit has been in the printer for quite some time. This
can also be caused by the OPC drum being exposed to light for a prolonged period of time.
Check the drum count to see how many pages have been printed with the OPC drum. Replace
the drum if the count exceeds 30,000 pages.
b. The OPC drum unit is not properly grounded. Make sure the OPC drum grounding
spring is not damaged. It must also make good physical contact with the printer base
pan.
514. The main drive gear for the developer gear assembly is broken.
a. The drive gear is broken and is not turning the developer sleeve. Replace the gear with
one that has reinforcing ribs.
515. The H.V.P.S. contact spring for the developer unit has no charge.
a. Check the contact spring from the H.V.P.S. according to the procedure in Chapter 8,
Power Supplies. If there is no charge, replace the power supply.
b. If there is no charge present with the new H.V.P.S., replace the L.V.P.S.
c. If both power supplies have been replaced, replace the Engine Controller Board.