Panasonic UF-5500, Service Manual

Page: 135 / 365

135
UF-5500 / 4500
11.2.3.6. INFO CODE=090
“INFO CODE=090” indicates that abnormal charge voltage is output from the high voltage unit.
INFO CODE=090 appears when the charge voltage turns into abnormal voltage caused by charge wire breaking,
short circuit, defect, and contact failure between Drum Cartridge and main frame through charge and GRID terminals.
When the charge voltage becomes abnormal, the high voltage unit shuts off the charge output, and then trouble
detection signal (HVERR) is output from pin 2 of CN1.
When the main PCB detects the trouble detection signal, the unit displays INFO CODE=090.
INFO CODE=090 is canceled by turning the power OFF then ON. (When the problem is not solved, INFO CODE=090
will be displayed again.)
INFO CODE=090
Yes
No
Yes
No
No
Did
INFO CODE=090
appear again?
Were there any problems
with the contacts?
Replace the
Drum Cartridge.
END
Clean the high
voltage contact
points.
Confirming the contact points of the main frame
Check the dirt on the high voltage terminals.
Check if the spring pressure of each high voltage terminal is strong enough.
(Isn't it distorted or bent?)
When a Drum Cartridge is installed on the main
frame , are the terminals
connected to the main frame surely?
Confirming the Drum Cartridge (In case that replacement of the development
unit caused
INFO CODE=090 to appear again.)
Check if the charge wire has breaking, loose, or dirt, etc.
In case that the dirt is found on the charge wire, does the unit become normal
after getting rid of the dirt?
The charge wire should be cleaned with a soft cloth soaked in ethanol.
Be careful not to cut the wire.
Are the contact terminals of Drum Cartridge clean?
Replace the Drum Cartridge
with a brand-new one or the
unit checked on another set
working properly.
Confirm the high voltage
contacts on the unit.
Did
INFO CODE=090
appear again?
Yes
Refer to the troubleshooting
guide of high voltage unit.
Replace the
Drum Cartridge.
Did
INFO CODE=090
appear again?
END
No
Yes