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Phaser 6121MFP Service Manual
Theory of Operation
Laser Write Timing
When a Ready signal is detected after the print cycle begins, a Laser On signal is
output from the Engine Control Board. The Laser On signal triggers each laser
diode illuminating the SOS Board and generating an SOS signal. The SOS signal is
used to synchronize the timing at which the laser write each scan line.
The print start position in the CD direction is determined by the CD Print Start
signal (/HSYNC) that is output from the Image Processor Board and the width of
the paper.
The print start position in the FD direction is determined by the Image Write Start
signal (TOD) that is output from the Image Processor Board and the length of the
paper. The laser emission area is determined by the paper size. The area of 4 mm
on both the leading and trailing edges of the paper is, however, the void image
area.
/HSYNC
s6121mfp-119
/VIDEO
/VIDEO
/TOD
4 mm
4 mm
4 mm
4 mm
Summary of Contents for PHASER 6121MFP
Page 1: ...Phaser 6121MFP Multi Function Printer Phaser 6121MFP Service Manual...
Page 2: ......
Page 12: ...x Phaser 6121MFP Service Manual Contents...
Page 22: ...xx Phaser 6121MFP Service Manual...
Page 42: ...1 20 Phaser 6121MFP Service Manual General Information...
Page 106: ...2 64 Phaser 6121MFP Service Manual Theory of Operation...
Page 109: ...Phaser 6121MFP Service Manual 3 3 Error Messages and Codes s6121mfp 372...
Page 194: ...3 88 Phaser 6121MFP Service Manual Error Messages and Codes...
Page 306: ...6 44 Phaser 6121MFP Service Manual Adjustments and Calibrations...
Page 405: ...Phaser 6121MFP Service Manual 8 85 Service Parts Disassembly 3 Remove the spring s6121mfp 255...
Page 432: ...8 112 Phaser 6121MFP Service Manual Service Parts Disassembly...
Page 437: ...Phaser 6121MFP Service Manual 9 5 Parts List...
Page 477: ...Phaser 6121MFP Service Manual 9 45 Parts List...
Page 488: ...9 56 Phaser 6121MFP Service Manual Parts List...
Page 489: ...10 Chapter Wiring In this chapter Plug Jack Designations and Locator Diagrams Wiring Diagrams...
Page 530: ...1 6 Phaser 6121MFP Service Manual Index...
Page 531: ......