Lexmark T430 Service Manual - Page 37

Symptom tables

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4048-1xx Symptom tables POST symptom table These symptoms may appear during the POST (Power-on Self Test). See "Power-On Reset (POR) sequence" on page 2-2 for the sequence when a printer is turned on. Symptom The main motor, cooling fan and fuser do not come on. POST completes except display is incomplete or erratic. POST complete except display does not function. Main motor does not come on. Fan does not come on. Fuser heater does not come on. Fuser heater never turns off. The paper feed picks and tries to feed paper. Action See "Cover interlock switch service check" on page 2-37. See "Operator panel service check" on page 2-43. See "Operator panel service check" on page 2-43. See "Main motor service check" on page 2-42. See "Cooling fan service check" on page 2-36. See "Cold fuser service check" on page 2-41. See "Hot fuser service check" on page 2-41. See "Paper feed service checks" on page 2-45. Diagnostic information 2-3

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Diagnostic information
2-3
4048-1
xx
Symptom tables
POST symptom table
These symptoms may appear during the POST (Power-on Self
Test). See
“Power–On Reset (POR) sequence” on page 2-2
for
the sequence when a printer is turned on.
Symptom
Action
The main motor, cooling fan and
fuser do not come on.
See
“Cover interlock switch
service check” on page 2-37
.
POST completes except display is
incomplete or erratic.
See
“Operator panel service
check” on page 2-43
.
POST complete except display
does not function.
See
“Operator panel service
check” on page 2-43
.
Main motor does not come on.
See
“Main motor service check”
on page 2-42
.
Fan does not come on.
See
“Cooling fan service check”
on page 2-36
.
Fuser heater does not come on.
See
“Cold fuser service check” on
page 2-41
.
Fuser heater never turns off.
See
“Hot fuser service check” on
page 2-41
.
The paper feed picks and tries to
feed paper.
See
“Paper feed service checks”
on page 2-45
.