6.5.5. SIMPLIFIED TROUBLESHOOTING GUIDE
6.5.5.1. PRINTING
No. Symptom Cause Countermeasure
1 GHOST IMAGE (P.88) Failed drum unit Replace drum unit
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.140)
Failed fuser unit Check the heat roller and the pressurized roller and the spring
and the heat lamp and the thermistor
Failed the power supply board Go to POWER SUPPLY BOARD SECTION (P.144)
Too thick or too thin recording paper Use the recording paper from 16lb to 24lb
2 DARK OR WHITE
VERTICAL LINE (P.89)
Dirty the lower glass or the reflecting mirror Clean the lower glass and the reflecting mirror
Dust on the path of the laser beam Clean the path of the laser beam
Dust on the developing roller Replace drum unit
Failed the heat roller or the pressuizedr roller Check the heat roller and the pressurized roller
Failed LSU Go to LSU SECTION (P.137)
3 DARK OR WHITE
HORIZONTAL LINE (P.90)
Failed drum unit Replace drum unit
Failed the gear Check the gear
Failed the engine motor Go to ENGINE MOTOR (P.135)
Failed the high-voltage terminal Check the high-voltage terminal
Failed the high voltage power supply board Go to HIGH VOLTAGE SECTION (P.140)
Scratch on the OPC drum Replace drum unit
Static electricity on the documents (when
copying)
Check the connection between the parts around CIS and earth
4 DIRTY OR HALF
DARKNESS
BACKGROUND (P.91)
Failed drum unit Replace drum unit
Life of drum unit is over Replace drum unit
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.140)
Dirty the recording paper path Clean the recording paper path
5 BLACK PRINT (P.92) Failed drum unit Replace drum unit
Failed LSU Go to LSU SECTION (P.137)
Failed the high-voltage terminal Check the high-voltage terminal
Failed the high voltage power supply board Go to HIGH VOLTAGE SECTION (P.140)
Failed the digital board Check the digital board
Failed CIS (when copying) Go to CIS (Contact Image Sensor) SECTION (P.138)
6 LIGHT PRINT (P.93) Short toner Supply toner
Failed drum unit Replace drum unit
Life of drum unit is over Replace drum unit
Dirty the lower glass or the reflecting mirror Clean the lower 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.140)
7 BLACK DENSITY IS
LIGHT OR UNEVEN(P.94)
Short toner Supply toner
Failed drum unit Replace drum unit
Life of drum unit is over Replace drum unit
Dirty the lower glass or the reflecting mirror Clean the lower 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.140)
8 BLANK PRINT (P.95) Failed drum unit Replace drum unit
Failed LSU Go to LSU SECTION (P.137)
Failed the high-voltage terminal Check the high-voltage terminal
Failed the high voltage power supply board Go to HIGH VOLTAGE SECTION (P.140)
Failed the digital board Check the digital board
Failed CIS (when copying) Go to CIS (Contact Image Sensor) SECTION (P.138)
9 BLACKORWHITEPOINT
(P.95)
Failed the developer roller (31.4mm pitch) Replace drum unit
Failed the OPC drum (75.4mm pitch) Replace drum unit
Failed the heat roller (62.8mm pitch) Check the heat roller
Failed the charge blush (21mm pitch) Replace drum unit
Failed the high voltage power supply board Go to HIGH VOLTAGE SECTION (P.140)
Too thick or too thin recording paper Use the recording paper from 16lb to 24lb
79
KX-FL612CX / KX-FL612CX-S
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