6-36
FS-1900
(1) Completely blank printout
Check the developer.
• Check that the developer is inserted correctly. See page 5-4.
• Check that the toner on the magnet roller surface. See page 5-4.
Check the transfer bias potential.
• Check the transfer bias output on the high voltage unit. This requires removal of the left cover and
the test equipment. Replace the high voltage unit if high voltage potential is not available on the
board. See page 5-25.
Check the laser scanner unit.
• The scanner components within the scanner may be disordered. Replace the laser scanner unit.
See page 5-37.
Replace the main board.
• Defective laser scanner unit control circuit in the main board (KP-948). See page 5-24.
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