Lexmark 4227-100, Service Manual

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2-2
4227-100
Error Indication Table
The following table describes the service check entries for the printer
error indication codes.
When an error indication changes after you have entered a service
check, you have an intermittent problem. If this occurs, leave the
service check and go to
“Symptom Table” on page 2-4 .
Display Indication Description / Action
631 Machine Check
Display RAM Error Display RAM Read/Write Error. This error
is detected only during POST. Replace the
operator panel.
632 Machine Check
System RAM Error System RAM Read/Write Error.
Replace the main logic board and
adjust the
“Bidirectional Print Adjustment”
on page 4-4 . Check the “Printhead-to-
Platen Gap Adjustment” on page 4-2 .
633 Machine Check
Timer Interrupt Error Timer Interrupt Controller Error. Replace
the main logic board and adjust the
“Bidirectional Print Adjustment” on page
4-4
. Check the “Printhead-to-Platen Gap
Adjustment” on page 4-2 .
636 Machine Check
NOVRAM Error Non-Volatile Memory Read/Write Error.
Replace the main logic board and adjust
the
“Bidirectional Print Adjustment” on
page 4-4 . Check the “Printhead-to-Platen
Gap Adjustment” on page 4-2 .
637 Machine Check
CA Drive Error Home Timeout Error. Go to the “Carrier
Drive Service Check” on page 2-14 .
638 Machine Check
CA Drive Error Carrier Drive Error.
No emitter pulse detected. Go to the
“Carrier Drive Service Check” on page
2-14
.
639 Machine Check
CA Drive Error Carrier Drive Error.
Carrier positioning error. Go to the
“Carrier
Drive Service Check” on page 2-14 .
63B Machine Check
Key Scan Error Button Scanning Error.
Go to the
“Operator Panel Service Check”
on page 2-20 .