
PRINTER 3000 304 995 - 01
i
PRINTER MODEL-L1
(
G191
)
SERVICE MANUAL
TECHNICAL DOCUMENT
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6 September 2005
1-4
1.2.3 LASER EXPOSURE
Overview
Laser Unit Layout
A : Laser Diode Unit
F : Laser Synchronization Detector
B : Polygon Mirror Motor
G : Cylindrical Lens
C : F-theta Lens
H : Synchronization Detector Lens
D : First Mirror
J : Shutter
E : Second Mirror
This machine uses a laser diode to produce an electrostatic latent image on the
OPC drum. The laser diode unit converts image data into laser pulses, and the
optical components direct these pulses to the OPC drum.
As a mechanical safety feature, the shutter [J] closes to block the laser beam path
whenever the front door is opened.
G182D004.WMF
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]
[J]