Oki ML420 - Page 98

42113901TH01 Rev.3 98 /
Oki Data CONFIDENTIAL
ALARM
CATEGORY
ALARM
LED DISPLAY
ALARM
10
12
15
17 20
PROP HSD UTL
NLQ
REMARKS
TROUBLESHOOTING
SPACING
ALARM
Spacing alarm
Print Head
homing alarm
Print Head
A/D alarm
Space IPT is not occurred
within in specified timing.
: LED Blink (200ms ON, 200ms OFF)
: LED Lights up
PRINT
HEAD
ALARM
Print Head Gap
A/D alarm
• Replace space motor.
• Replace P.H. cable.
• Replace Control Board
• Check the mechanisms if
load is too much.
• Check the P.H. connection.
• Replace Print Head.
• Replace P.H. cable.
• Replace Control Board
Print head does not reach
to the home position.
Thermister is open, short
with 0V or short with +5V.
Print Head Gap Signal open.
• Replace P.H. cable.
• Replace Space Motor Assy.
• Replace Control Board
SP motor
A/D alarm
Thermister is open, short
with 0V or short with +5V.
• Replace P.H. cable.
• Replace Space Motor Assy.
• Replace Control Board
FAN alarm
FAN motor does not rotate.
• Replace Control Board
• Replace FAN motor.
Table 6.3 (2/2)