Alarm/Led Display Troubleshooting Tables - OKIDATA ML590 Service Manual

4.6.03 ALARM/LED Display Troubleshooting Tables

Reference Failure
Number Description
1 Space Motor
Alarm
2 Printhead
Detection Alarm
3 Printhead A/D
Alarm
4 Printhead Gap
Alarm
5 Printhead Data
Transfer Alarm
6 Printhead Type
Alarm
7 Printhead
Connection Alarm
(1)
8 Printhead
Connection Alarm
(2)
Service Guide ML590/ML591
Chapter 4 Failure & Repair Analysis
Cause Recommended Action
Space motor IPT
Refer to RAP 02.(
does not occur in
specified time
Printhead does
Refer to RAP 03.
not home
Thermistor is Check the printhead
open or +5 vdc connection then replace
shorted main control board carriage
cable printhead
Self adjustment Check the printhead
was not connection then replace the
successful main control board carriage
cable printhead
Printhead parity Replace main control board
error carriage cable printhead
9 pin printhead is Replace the printhead with a
connected in a 24 pin printhead
24 pin printer
Drive current is Check the printhead
detected during connection then replace
no overdrive main control board carriage
signal cable printhead
Overdrive signal Check the printhead
is active but no connection then replace
current is main control board carriage
detected cable printhead
Page: 155