2. The APC mode is set for the Y/M and C/Bk Laser Driver PCB ICs, and the laser diode of each color is forcibly emitted. The
photo diode (PD) monitors the laser diode (LD), and each Laser Driver IC adjusts the output of laser diode until the laser
light intensity reaches a specified level.
LD
PD
LD
Y Laser
LD
PD
LD
M Laser
LD
PD
LD
C Laser
Laser Scanner Unit
LD
PD
LD
Bk Laser
C/Bk Laser Driver
PCB(UN09)
Y/M Laser Driver
PCB(UN08)
ASIC
APC Signal
■ BD correction control
Purpose
Corrects the displacement of each color's laser write start position due to the varied angle of the Polygon Mirror surface.
Execution timing
At power-on, and at each print
Control description
1. The Main Controller PCB measures the BD interval after the completion of constant speed rotation control of the Scanner
Motor.
2. The Main Controller PCB calculates the correction value from the displacement of the BD interval.
3. The write start position is corrected by correcting the write start timing based on the above correction value.
Gap
Gap
Gap
Gap
BD interval
Specified
value
Before
correction
After
correction
BD1
BD2
BD1
BD2
BD1
BD2
START
END
Scanner motor control finish
(Constant-speed
rotation detection)
BD interval measurement
Write start position
correction value calculation
Write start position
correction value
Related Error Code
• E100-0001: BD error
2. Technology
60
Summary of Contents for imageRUNNER ADVANCE C3330 Series
Page 1: ...Revision 7 0 imageRUNNER ADVANCE C3330 C3325 C3320 Series Service Manual ...
Page 18: ...Product Overview 1 Product Lineup 7 Features 11 Specifications 17 Parts Name 26 ...
Page 518: ...Error Jam Alarm 7 Overview 507 Error Code 511 Jam Code 617 Alarm Code 624 ...
Page 1020: ...9 Installation 1008 ...
Page 1022: ...2 Perform steps 3 to 5 in each cassette 9 Installation 1010 ...
Page 1024: ...5 6 Checking the Contents Cassette Feeding Unit 1x 3x 2x 1x 9 Installation 1012 ...
Page 1027: ...3 4 NOTE The removed cover will be used in step 6 5 2x 2x 9 Installation 1015 ...
Page 1046: ...When the Kit Is Not Used 1 2 Close the Cassette 2 When the Kit Is Used 1 9 Installation 1034 ...
Page 1068: ... Removing the Covers 1 2x 2 1x 9 Installation 1056 ...
Page 1070: ...3 1x 1x 9 Installation 1058 ...
Page 1083: ...6 7 TP M4x8 2x 2x 9 Installation 1071 ...
Page 1084: ...When Installing the USB Keyboard 1 Cap Cover Wire Saddle 9 Installation 1072 ...
Page 1129: ...9 2x 10 2x 11 9 Installation 1117 ...
Page 1135: ...Remove the covers 1 ws 2x 2 1x 9 Installation 1123 ...
Page 1140: ...2 2x 3 Connect the power plug to the outlet 4 Turn ON the power switch 9 Installation 1128 ...
Page 1176: ... A 2x Installing the Covers 1 1x 2 2x 9 Installation 1164 ...
Page 1190: ...14 Install the Cable Guide to the HDD Frame 4 Hooks 1 Boss 9 Installation 1178 ...