Polygon Motor And Laser Exposure - Ricoh G092 Service Manual

PRINT PROCESS

Polygon motor and laser exposure

[A]: Polygon mirror
[B]: OPC drums Y, M, C, K
The octagonal polygon mirror [A] reflects the laser beams. The beams "write" the
latent images on the OPC drums [B]. The charge on exposed areas of the drum
falls to about –50 V. Unexposed areas of the drum remain charged at
approximately –600 V.
Laser output power is either 0.25 mW or 0.4 mW depending on whether the printer
is printing the 1200-dpi mode or 600-dpi mode.
Safety switch
The LSU safety interlock switch interrupts power to the laser if either the front or
right cover is open.
G081/G092
Y M
C
6-12
[B]
K
G081D907.WMF
[A]
SM