Toshiba e-STUDIO2500c Service Manual page 175

6) Reflecting mirrors
These reflecting mirrors reflect and lead the laser beams scanned by the polygonal mirror and cor-
rected by the fθ lenses to the drum. The laser beams of Y, M, C and K colors are directed to the
drum by respectively different routes using one mirror for Y color beam and three each for M, C and
K color beams.
Y
Reflecting mirror
Reflecting mirror
7) Mirror motor (M14, M15, M16)
At each of the third reflecting mirrors for M, C and K color laser beams, a mirror motor is installed to
make tilt adjustment for the mirror. The parallel correction for the four scanning lines is performed by
adjusting the tilt of mirrors in the following manner:
a. A test pattern is written on the transfer belt. This is read by the Image position aligning sensors
(S16, S17) to recognize the error in scanning lines.
b. With the Y color scanning line as a standard, a mirror motor installed at each of the M, C and K
color beam mirrors is driven to adjust the degree of laser beam parallelization by inclining the mirror.
May 2006 © TOSHIBA TEC
Reflecting mirror
M C
Reflecting mirror
f lens-2
Fig. 8-7
8 - 7
K
Polygonal mirror
f lens-1
e-STUDIO2500c/3500c/3510c LASER OPTICAL UNIT
8