Panasonic UF-5500, Service Manual

Page: 127 / 365

127
UF-5500 / 4500
11.2.2. Simplified Troubleshooting Guide
11.2.2.1. Printing
No. Symptom Cause Countermeasure
1 Ghost Image (P.136) Failed drum cartridge Replace drum cartridge
Failed transfer unit Check the transfer roller and spring
Failed the high-voltage terminal Check the high-voltage terminal
Failed the high voltage power supply board Go to High Voltage Section (P.181)
Failed fuser unit Check the heat roller and the pressurized roller and the spring
and the heat lamp and the thermistor
Too thick or too thin recording paper Use the recording paper from 16lb to 24lb
2 Dark or White Vertical
Line
(P.137)
Dirty the cover glass or the reflecting mirror Clean the cover glass and the reflecting mirror
Dust on the path of the laser beam Clean the path of the laser beam
Failed drum cartridge Replace drum cartridge
Failed the heat roller or the pressurized roller Check the heat roller and the pressurized roller
Failed LSU Go to LSU (Laser Scanning Unit) Section (P.51)
3 Dark or White Horizontal
Line
(P.138)
Failed drum cartridge Replace drum cartridge
Failed the gear Check the gear
Failed the engine motor Go to Engine Motor (P.174)
Failed the high-voltage terminal Check the high-voltage terminal
Failed the high voltage power supply board Go to High Voltage Section (P.181)
Scratch on the OPC drum Replace drum cartridge
Static electricity on the documents (when copy-
ing) Check the connection between the parts around CIS and
“ground”, “earth”
4 Dirty or Half Darkness
Background
(P.139)
Failed drum cartridge Replace drum cartridge
Dirty the pickup roller and the regist roller and
the feed roller and the eject roller and the heat
roller and the pressure roller Clean the pickup roller and the regist roller and the feed roller
and the eject roller and the heat roller and the pressure roller
Failed the high-voltage terminal Check the high-voltage terminal
Failed the high voltage power supply board Go to High Voltage Section (P.181)
Dirty the recording paper path Clean the recording paper path
5 Black Print (P.140) Failed drum cartridge Replace drum cartridge
Failed LSU Go to LSU (Laser Scanning Unit) Section (P.51)
Failed the high-voltage terminal Check the high-voltage terminal
Failed the high voltage power supply board Go to High Voltage Section (P.181)
Failed the main board Go to Main Board Section (P.25)
Failed CIS (when copying) Go to CIS Control Section (P.177)
6 Black Print (P.140) OR
Light Print (P.141)
Short toner Supply toner
Failed drum cartridge Replace drum cartridge
Life of drum cartridge is over Replace drum cartridge
Dirty the cover glass or the reflecting mirror Clean the cover glass and the reflecting mirror
Failed the high-voltage terminal Check the high-voltage terminal
Failed the high voltage power supply board Go to High Voltage Section (P.181)
Failed the main board Go to Main Board Section (P.25)
Failed CIS (when copying) Go to CIS Control Section (P.177)
7 Black or White Point
(P.142)
Failed the developer roller (32mm pitch) Replace drum cartridge
Failed the OPC drum (75mm pitch) Replace drum cartridge
Failed the heat roller (79mm pitch) Check the heat roller
Failed the high voltage power supply board Go to High Voltage Section (P.181)
Too thick or too thin recording paper Use the recording paper from 16lb to 24lb