M126/M127/M128 6-4 SM
6.3.2 PRINTER SYMPTOM TABLE
Symptom Action
Touchscreen displays upside down Replace the display keypad.
Fan noisy or fan not working.
p.6-55 "Cooling Fan Service Check"
Fuser parts melted.
p.6-59 "LVPS/HVPS Service Check"
Toner not fused to the media.
p.6-58 "Fuser Service Check" or see
“Solving print quality problems” in
“Troubleshooting”.
Paper jams.
p.6-65 "Paper Feed Service Checks"
Main motor noisy or not moving.
p.6-60 "Main Motor Service Check"
Media skew.
p.6-65 "Paper Feed Service Checks"
Printer not communicating with host.
p.6-70 "USB Port Service Check"
Card reader fails to recognize the user’s
security card. (Possible card reader failure)
p.6-55 "Card Reader Service Check"
Front access door will not close.
p.6-56 "Cover Interlock Switch Service
Check"
Operator panel button not responding.
p.6-64 "Operator Panel Service Check"
Operator panel lights are off or very dim.
p.6-64 "Operator Panel Service Check"
Blank page. See “Blank page” in “Troubleshooting”.
Black page. See “Black page” in “Troubleshooting”.
Heavy background.
See “Heavy background” in
“Troubleshooting”.
Light print. See “Light print” in “Troubleshooting”.
White or black lines or bands.
See “White or black lines or bands” in
“Troubleshooting”.