E2: Laser Scanner Motor Error; E3: Laser Beam Detection Error - Mita DP-2800 Service Manual

E2: Laser scanner motor error

Meaning
The revolution of the
polygon motor does
not reach the prede-
termined revolution.

E3: Laser beam detection error

Meaning
Beam detection is
failed. The photo de-
tector failed to detect
laser beam.
Suggested causes
• Defective scanner motor (e.g., at
its axle holder)
• Connection error between polygon
motor and liaison connector, or
liaison connector and KP-570 (YC3)
• Defective engine gate array (U2/
U6)
• Defective scanner motor driver
transistor
Suggested causes
• Laser diode does not emit.
• Connectionerror between KP-578
(YC2) and KP-579 (YC101 [within
scanner]), KP-578 (YC1) and
KP-570 (YC2), KP-578 (YC1) and
KP-564 (YC3), KP-570 (YC1) and
KP-564 (YC3), or KP-572 (YC1)
and KP-564 (YC3)
• Defective or contaminated pin-
photo IC
• Malfunctioning interlock detection
circuit on the ending board
• Defective engine gate array U2
Corrective action
Check/replace cables.
Replace KP-544. Replace
KP-564. Replace KP-570.
Replace scanner unit.
Corrective action
Check/replace cables.
Replace KP-544. Replace
KP-564. Replace KP-570.
Replace scanner unit.
5A2
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