Toshiba DP1200 Service Manual page 55

5) Loosen the copy lamp unit/No.2/3 mirror unit drive pulley
setscrew in the side where No.2/3 mirror unit does not make
contact with No.2/3 mirror unit positioning plate.
Scanner unit drive pulley
6) Without moving the copy lamp unit/No.2/3 mirror unit drive pulley
shaft, manually turn the copy lamp unit/No.2/3 mirror unit drive
pulley in the same direction of the loosened setscrew. When it
makes contact with No.2/3 mirror unit positioning plate, tighten
and fix the setscrew.
7) Manually turn the copy lamp unit/No.2/3 mirror unit drive gear to
8) With No.2/3 mirror unit positioning plate in contact with No.2/3
Set screw
9) Set the image distortion check chart on the document table, and
9 – 2
bring No.2/3 mirror unit into contact with the positioning plate,
and perform the procedure of step 4).
Repeat procedures of steps 4) to 7) until the parallelism of
No.2/3 mirror unit is properly set.
mirror unit, bring the copy lamp unit into contact with the right
frame and fix the copy lamp unit to the drive wire.
Procedures 1) to 8) are for adjustment of mechanical horizontal
parallelism. The copy lamp unit and No.2/3 mirror are fixed to the
specified positions and the mechanical horizontal parallelism of
No.2/3 mirror is adjusted.
Then the optical horizontal parallelism must be adjusted in the
following procedures.
Copy lamp unit projection
make a reduction copy (75%) on an A4 or 11" × 8 1/2" paper
with the document cover open.
50mm
Image distortion check chart
DP1200/1500