Lexmark E450DN - E 450dn B/W Laser Printer Service Manual page 39

Service error codes (9xx) (Continued)
Error Description
924.01 Open thermistor check failure. This applies to the fuser and belt fusers.
924.02 Open thermistor check failure. The ADC failed to converge. Possible noisy thermistor signal. This applies to the
fuser and belt fusers.
Fan service errors
927.00 Service fan error
927.03 Main fan took too long to ramp up
927.04 Main fan is under speed or stalled during speed adjustment state
927.05 Main fan overspeed during speed adjustment state.
927.06 Main fan capture data is invalid and speed control is at maximum in fan control idle state
927.07 Main fan capture data is invalid and speed control is at maximum in fan control adjustment state.
Printhead service errors
931.00 No first hsync
931.01 No first hsync
932.00 Lost hsyncs
932.01 Lost hsyncs
933.00 Printhead boost signal failure
935.10 Printhead sweep error, swept through Hz range without finding the resonant frequency
935.11 Printhead sweep error, autosweep hw state
935.12 Printhead sweep error, coarse sweep state
935.13 Printhead sweep error, init fine sweep state
935.14 Printhead sweep error, fine sweep state
935.15 Printhead sweep error, check prelim amp state
935.16 Printhead sweep error, enable amp Kp state
935.17 Printhead sweep error, amp Kp failed to converge
935.18 Printhead sweep error, enable amp Ki state
935.19 Printhead sweep error, amp Ki failed to converge
935.20 Printhead sweep error, enable offset controller state
935.21 Printhead sweep error, load scan regs state
935.22 Printhead sweep error, fwd and rev capture times differ by too much
935.23 Printhead sweep error, check sweep accuracy state
935.24 Printhead sweep error, reserved
935.25 Printhead sweep error, detected resonant frequency out of expected range
935.26 Printhead sweep error, timed out waiting for end of sweep
4512-630
2-13
Diagnostics information