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Service error codes (9xx.xx) (continued)
Error
Sub
Description
code
codes
927
.02
Cartridge fan stalled.
927
.03
Main fan took too long to
ramp up.
927
.04
Main fan underspeed 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.
929
.00
Toner sensor error—a
problem has been
detected with the toner
sensor.
929
.66
An error has been
detected. No home
windows has been
detected.
929
.67
No toner sensor
transition.
930
.00
An incorrect printhead
has been detected
932
.00
Printhead lost HSYNC.
933
.00
Mirror motor locked, no
first HSYNC received.
934
.00
Mirror motor lost lock
Service Manual
2-24
Possible causes
• Loose connector.
• External blockage of the fan,
preventing it from turning.
• Bad fan.
• Loose connector.
• External blockage of the fan,
preventing it from turning.
• Bad fan.
• Corrupted feedback signal.
• Fan input voltage may be too low.
• Corrupted feedback signal.
• Fan input voltage may be too low.
Corrupted or non-existent feedback
signal.
Corrupted feedback signal.
• Check the toner sensor
• Check cable
• Check system board
• Check toner cartridge.
• Check toner sensor
• Check toner sensor
• Check toner cartridge
Check the printhead
• Check printhead
• Check cables and connections
• Check system board
• Check printhead
• Check cables and connectors
• Check system board.
• Check printhead
• Check cables and connections
• Check system board
Action
Go to
"Cartridge fan service
check" on page
2-76.
Go to
"Main fan" on
page
2-76.
Go to
"Main fan" on
page
2-76.
Go to
"Main fan" on
page
2-76.
Go to
"Main fan" on
page
2-76.
Go to
"Main fan" on
page
2-76.
Go to
"Toner sensor service
check" on page
2-128.
Go to
"Toner sensor service
check" on page
2-128.
Go to
"Toner sensor service
check" on page
2-128.
Go to
"Printhead service
check" on page
2-123.
Go to
"Printhead service
check" on page
2-123.
Go to
"Printhead service
check" on page
2-123.
Go to
"Printhead service
check" on page
2-123.
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