Konica Minolta bizhub C658 Service Manual page 1793

bizhub C658/C558/C458/C368/C308/C258
[3]
[2]
[1]
[7]
[6]
[10] [9]
[6]
[1] Laser diode/K (LD/K)
[3] Laser diode/M (LD/M)
[5] Return mirror (light source)
[7] Polygon motor (M14)
[9] G2 lens
[11] Return mirror3
3.3.3 Laser emission timing
(1) bizhub C368/C308/C258
• After a print cycle has been started, when the stable rotation signals of photo conductor and polygon motor are detected, a laser ON
signal is output from the MFP board.
• The laser ON signal causes each laser diode to turn ON and emit a laser beam.
• The K laser light that is irradiated to the index board after it passes through the return mirror (light source), cylindrical lens, polygon
mirror, G1 lens, G2 lens, index mirror, and index lens generates an index signal.
• This index signal has a function of keeping the same laser light emission timing per every one line in the main scanning direction.
• The index signal is generated with the K laser light only. The laser light emission timing for other colors is determined with reference to K.
• If the index signal is not detected within a predetermined period of time, the machine determines that it is a laser emission fault,
displaying "trouble code: C4501 laser malfunction".
• The machine continuously monitors the index signal. If the index signal cannot be detected at regular intervals, the machine determines
that it is a laser emission fault, displaying "trouble code: C4501 laser malfunction".
[3]
[2]
[1]
[8]
[7]
[1] Laser diode/K (LD/K)
[3] Laser diode/M (LD/M)
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 3. WRITE
[4] [5]
[10] [9] [11] [10]
[8]
[5] [6]
[4]
[9] [9]
[8] [8] [8]
[2] Laser diode/C (LD/C)
[4] Laser diode/Y (LD/Y)
[6] G1 lens
[8] Return mirror1
[10] Return mirror2
- -
[2] Laser diode/C (LD/C)
[4] Laser diode/Y (LD/Y)
O-18
SECTION (PH SECTION)