Oki OKIFAX 5750 Maintenance Manual page 271

(2) Do not disassembly the printer as long as it is operating normally.
(3) Do not remove parts which do not have to be touched; try to keep the disassembly to a
minimum.
(4) Use specified service tools.
(5) When disassembling, follow the laid out sequences. Parts may be damaged if these
sequences are not followed.
(6) Since screws, collars and other small parts are likely to be lost, they should temporarily
be attached to the original positions during disassembly.
(7) When handling IC's such as microprocessors, ROMs and RAMs, or circuit boards, do not
wear gloves that are likely to generate static electricity.
(8) Do not place printed circuit boards directly on the equipment or floor.
(9) Remove the I/D unit (image drum unit).
- Open the document cover and stacker cover, then remove the I/D unit.
Caution: Do not expose the I/D unit to direct sunlight. To protect the I/D unit against room
lights, cover it with A4-size paper or the like.
Board or Part
(a) NCU board
(b) LED print head
41285901TH Rev.3
I/D unit
DIP switches to be placed in the same position as on the
removed board. Refer to Chapter 8.
When the rank marking of the replaced LED print head (new
part) is the same as that of the used LED print head (old part),
you do not always have to set the LED print head strobe time
by the technical function (Refer to chapter 5).
Document cover
Stacker cover
Adjustment
271 /