Code: 173, 177
Display:
Service Call 173: Error 177: Error
Description:
Thermistor indicates low-temperature error.
Causes:
1) Is error message displayed? 2) Does error reoccur?
Remedy:
Turn ON power again. Replace thermistor and turn power OFF. Leave aside for 30 min.
Code: 179
Display:
Service Call 179: Error
Description:
Wrong fuser standard.
Causes:
1) Does fuser match with model and power voltage? 2) Error reoccurs after setting fuser properly.
Remedy:
Set proper fuser. Check if fuser is set properly. Replace fuser.

Code: 180 ... 186
Display:
Service Call 180: Error - 186: Error
Description:
Communication disability with option unit detected by engine.
Causes:
1) Is error message displayed? 2) Does error reoccur?
Remedy:
Turn ON power again. Replace option unit.
Code: 187
Display:
Service Call 187: Error
Description:
Communication with control panel disabled.
Causes:
Is cable properly connected to control panel?
Remedy:
Connect properly. Replace control panel and cable.
Code: 310
Display:
Close cover 310: Top cover open
Description:
Printer engine cover open.
Causes:
1) Check if top cover is open. 2) Check if cover switch is proper.
Remedy:
Close top cover. Close side cover. Replace cover switch.
Code: 320
Display:
Reset fuser 320: Fuser error
Description:
Same unit not detected upon power ON or opening cover.
Causes:
1) Is error message displayed? 2) Is fuser unit set properly? 3) Does error reoccur?
Remedy:
Check if fuser is set properly. Reset fuser and turn ON power again. Replace fuser unit assembly.
Code: 321
Display:
Turn power OFF and wait 321: MOTOR OVERHEAT
Description:
Printer cannot be used temporarily due to motor overheat.
Causes:
Remedy:
Turn ON power after a while.
Code: 323
Display:
Open/close cover 323: Paper thickness error
Description:
Sensor output out of range with no media. (Only for Factory Mode)
Causes:
1) Are foreign objects mixed in sensor? 2) Does printer recover when detecting paper thickness by opening/closing tray? 3) Does printer recover by power OFF/ON.
Remedy:
Remove foreign objects. Normal.
Code: 324
Display:
Open/close cover 324: Paper thickness error
Description:
Sensor output gap out of range with no media. (Only for Factory Mode)
Causes:
1) Are foreign objects mixed in sensor? 2) Does printer recover when detecting paper thickness by opening/closing tray? 3) Does printer recover by power OFF/ON.
Remedy:
Remove foreign objects. Normal.
Code: 325
Display:
Open/close cover 325: Paper thickness error
Description:
Media detect value out of range.
Causes:
1) Is different media type mixed in? 2) Is media being double fed?
Remedy:
Remove foreign objects.

Code: 326
Display:
Open/close cover 326: Paper thickness error
Description:
U-Heavy mode media detect value out of range.
Causes:
Is different media type mixed in?
Remedy:
Remove foreign objects.
Code: 330
Display:
Reset belt 330: Belt error
Description:
Same unit not detected upon power ON or closing cover.
Causes:
1) Is error message displayed? 2) Is belt unit set properly? 3) Does error reoccur?
Remedy:
Check set condition of belt unit. Reset belt unit and turn power ON again. Replace belt unit assembly.
Code: 330 ... 343
Display:
Reset drum 330-343: Drum error
Description:
Same as above.
Causes:
1) Is error message displayed? 2) Is image drum set properly? 3) Does error reoccur?
Remedy:
Check set condition of ID. Turn power ON again. Replace ID unit assembly.
Code: 350 ... 353
Display:
Set new drum 350: Yellow drum life 351: Magenta drum life 352: Cyan drum life 353: Black drum life
Description:
ID unit life.
Causes:
Right after replacing ID unit?
Remedy:
Check ID unit life. Replace ID unit.
Code: 354
Display:
Set new fuser 354: Fuser life
Description:
Fuser life (occurs when fuser life continuation is OFF).
Causes:
Right after replacing fuser?
Remedy:
Check fuser life. Replace fuser.
Code: 355
Display:
Set new belt 355: Belt life
Description:
Belt life notified (alarm). Print N-count by opening and closing cover.
Causes:
Right after replacing belt?
Remedy:
Check belt life. Replace belt.
Code: 356
Display:
Set new belt 356: Belt life
Description:
Waste toner belt life notified (alarm). Print N-count by opening and closing cover. N=20
Causes:
Right after replacing belt?
Remedy:
Check belt life. Replace belt.
Code: 360
Display:
Set duplex unit 360: Duplex unit is open.
Description:
When duplex unit is removed from printer.
Causes:
Does error recover by resetting duplex unit?
Remedy:
Normal. Replace duplex unit or engine board.
Code: 370
Display:
Check DUPLEX 370: Paper jam
Description:
Paper jam detected after paper rotated in duplex unit.
Causes:
Check paper jam in duplex unit.
Remedy:
Remove jammed paper. Check/replace duplex unit.
Code: 371
Display:
Check DUPLEX 371: Paper jam
Description:
Paper jam during paper feed from duplex unit.
Causes:
Check paper jam in duplex unit.
Remedy:
Remove jammed paper. Check/replace duplex unit.
Code: 372
Display:
Check DUPLEX 372: Paper jam
Description:
Causes:
Check miss-feed in duplex unit.
Remedy:
Remove miss-fed paper and close cover. Check/replace duplex unit.
Code: 380
Display:
Open front cover 380: Paper jam
Description:
Paper jam during paper feed from cassette 1, 2, 3, 4 or 5
Causes:
Check miss-feed in duplex unit.
Remedy:
Remove miss-fed paper and set cassette. Check/replace cassette 1, 2, 3, 4, or 5.
Code: 381
Display:
Open top cover 381: Paper jam
Description:
Paper jam detected between black ID and fuser
Causes:
1) Check paper jam between yellow ID and fuser. 2) Check fuser unit load.
Remedy:
Remove jammed paper. Replace fuser unit.
Code: 382
Display:
Open top cover 382: Paper jam
Description:
Paper jam detected in fuser or during paper ejection from fuser.
Causes:
1) Check paper jam in fuser and between yellow ID and fuser. 2) Check if paper ejection switch is proper.
Remedy:
Remove jammed paper. Replace paper ejection switch.
Code: 383
Display:
Open top cover 383: Paper jam
Description:
Paper jam detected when paper started to enter duplex print unit.
Causes:
Check paper jam in duplex unit or at entrance.
Remedy:
Remove jammed paper. Check/replace duplex unit.
Code: 389
Display:
Open top cover 389: Paper jam
Description:
Jam generated in paper path.
Causes:
Open front cover and check jammed paper.
Remedy:
Remove jammed paper.

Code: 390
Display:
Check MP tray 390: Paper jam
Description:
Paper jam during paper feed from MT.
Causes:
Check for miss-fed paper around MT cassette.
Remedy:
Remove miss-fed paper and close cover. Check/replace MT.
Code: 391 ... 395
Display:
Check tray 391-395: Paper jam
Description:
Paper jam detected between cassette and black ID.
Causes:
1) Check jammed paper between cassette and yellow ID. 2) Check if paper entry switch is normal.
Remedy:
Remove jammed paper. Replace entry switch.
Code: 400
Display:
Open top cover 400: Paper size error
Description:
Non-set paper (45mm or above) detected by printer engine.
Causes:
1) Is paper custom size? 2) Is paper standard size?
Remedy:
No treatment required. Adjust paper size guide in cassette. Replace paper size board (PXC PWB).
Code: 410 ... 413
Display:
Refill toner 410: Yellow 411: Magenta 412: Cyan 413: Black
Description:
Certain toner is almost empty.
Causes:
1) Selected toner cartridge is almost empty. 2) Check if selected toner cartridge is normal.
Remedy:
Replace with new toner kit. Replace selected toner sensor.
Code: 480
Display:
Remove paper 480: Stacker full
Description:
Paper ejection stacker is full.
Causes:
1) Check if stacker is full. 2) Check if stacker full sensor is operating properly.
Remedy:
Remove paper from stacker. Replace stacker full sensor.
Code: 490
Display:
Set 490: No paper in MP tray (* stands for A4 B4, etc.)
Description:
No paper in selected cassette. cassette is not set, or paper ran out in cassette being used.
Causes:
1) Check if paper is empty in MT. 2) Check if paper-end sensor is operating properly.
Remedy:
Set paper in MT. Replace paper-end sensor.
Code: 491 ... 495
Display:
Set 491-495: No paper in * tray (* stands for A4 B4, etc.)
Description:
Paper empty in cassette 1, 2, 3, 4, or 5.
Causes:
1) Check if paper is empty in selected cassette. 2) Check if paper-end sensor is operating properly.
Remedy:
Set paper in selected cassette. Replace the corresponding paper-end sensor.