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No
Name
No
Name
[1]
Synchronous PCB
[4]
VDO
[2]
Delay PCB
[5]
VDO signal process unit
[3]
Line memory
[6]
Laser driver PCB
BD_SYNCH
BD synchronous signal
RE_A/B/C/D
Readable signal
Controlling the Intensity of Laser Light
■ APC Control
The machine monitors the laser light that is emitted to the built-in photo diode of laser diode and adjusts the laser to appropriate
intensity.
Controlling the Polygon Motor
From when the polygon motor starts and the polygon motor reaches the number of target rotation to before image formation
starts, the machine controlsthe rotation speed by referring to the polygon motor rotation speed signal (FG signal).
During image formation, it controls the polygon motor rotation speed based on BD signal.
Polygon motor rotation speed is controlled by speed-up signal (ACC signal) and speed-down signal (DEC signal).
A
C
C
D
EC
F
G
J208
DC Controller PCB
Related Error Code
• E110-0001: The Polygon Motor (M11) speed lock signal does not indicate a locked state a specific period of time after the
Polygon Motor (M11) has been started.
• E110-0002: The speed lock signal indicates a deviation 10 times in sequence at intervals of 100 msec after the signal has
indicated a locked state.
• E110-0003: The Polygon Motor (M11) speed lock signal does not indicate a locked state for 6.5 sec. after a switchover is
made from low to normal speed or for 8 sec. after a switchover is made from normal to low speed.
Controlling the Laser Shutter
When a drum unit was drawn, laser shutter will be closed by laser shutter link that works in conjunction with the drum unit and
the laser light is blocked.
Also, when the front door or right door open is detected, polygon motor and the laser emission will be turned OFF.
2. Technology
87
Summary of Contents for imagerunner advance 4551i
Page 19: ...Product Overview 1 Product Lineup 7 Features 13 Specifications 16 Name of Parts 26 ...
Page 155: ...Periodical Service 3 Consumable Parts List 143 Cleaning Check Adjustment Locations 146 ...
Page 392: ...Error Jam Alarm 7 Overview 380 Error Code 383 Jam Code 509 Alarm Code 520 ...
Page 545: ...Service Mode 8 Overview 533 COPIER 549 FEEDER 845 SORTER 851 BOARD 871 ...
Page 892: ...Unpacking 1 2 1200 mm 840 mm 769 mm 1230 mm 2430 mm 3 9 Installation 879 ...
Page 895: ...3 4 NOTE Keep the removed screws for relocating the host machine 2x 5 6 7 9 Installation 882 ...
Page 896: ...8 9 10 1x Installing the Air Filter 1 9 Installation 883 ...
Page 897: ...2 3 Installing the Drum Unit 1 2 3 9 Installation 884 ...
Page 899: ...8 NOTE The screw removed at procedure 4 is used 1x 9 10 11 12 9 Installation 886 ...
Page 923: ...5 6 NOTE Use the screws and Rubber Caps removed in step 1 2x 7 2x 9 Installation 910 ...
Page 935: ...7 1x 8 9 6x 10 2x 9 Installation 922 ...
Page 936: ...11 Installing the NFC Kit 1 2 2x 3 TP M3x4 1x 9 Installation 923 ...
Page 938: ...4 5 1x 6 9 Installation 925 ...
Page 985: ...8 2x 2x TP M4x8 Black When installing the USB Keyboard 1 9 Installation 972 ...
Page 991: ...7 4x 8 1x 1x Lower Cover 9 1x 10 1x 1x 9 Installation 978 ...
Page 992: ...11 1x 1x 12 1x 13 TP M3x12 2x 14 4x TP M3x6 9 Installation 979 ...
Page 997: ...Installation Procedure 1 2 2x 3 2x 4 6x 5 4x 9 Installation 984 ...
Page 998: ...6 7 NOTE Do not close the Wire Saddle 1x 1x 8 9 9 Installation 985 ...
Page 1003: ...2 1x 1x 3 2x 2x 4 9 Installation 990 ...
Page 1012: ...2 1x 1x 3 2x 2x 4 9 Installation 999 ...
Page 1014: ...7 CAUTION The connector must be contacted TP㸹M3x6 3x 1x 8 4x 9 9 Installation 1001 ...
Page 1016: ...13 4x 14 15 Binding M4x16 Binding M3x16 2x M3x16 M4x16 16 Binding M4x6 1x 9 Installation 1003 ...
Page 1023: ...Installation Procedure Preparation 1 4x 2 1x 1x 3 2x 9 Installation 1010 ...
Page 1029: ...4 5 1x 1x 9 Installation 1016 ...
Page 1048: ...3 2x TP M3x8 Black 4 2x TP M3x6 5 9 Installation 1035 ...
Page 1053: ... Installing the Removable HDD Kit 1 2x 2x 2 3 1x 4 9 Installation 1040 ...
Page 1065: ...3 2x TP M3x8 Black 4 2x TP M3x6 5 9 Installation 1052 ...
Page 1071: ... Installing the Removable HDD Kit 1 2x 2x 2 3 1x 4 9 Installation 1058 ...