Xerox Phaser 7750DXF, Service Manual, Page: 364 / 505

10-40 Phaser 7750 Printer Service Manual
Laser Control Y (As an Example)
VIDEO DATA Y7 VIDEO DATA Y6 VIDEO DATA Y5 VIDEO DATA Y4 VIDEO DATA Y3 VIDEO DATA Y2 VIDEO DATA Y1 VIDEO DATA Y0
VALID Y
VIDEO CLOCK
PAGE REQUEST Y
LINE REQUEST Y
1
2
3
6.12C
6.9
3
6.12C
ESS PWB PL13.1
MCU PWB PL13.1
6.5A LASER CONTROL AND SCANNING (Y) (1 of 2)
P/J460
A9 B9
A10 B10 A12 B12 A13 B13 B16 B28 A16 A17
MCU PWB PL13.1
MCU PWB PL13.1
ROS ASSY PL3.1
SOS PWB (Y)
J401
+5VDC
+5VDC
+5VDC +5VDC +5VDC
INTERLOCK
+5VDC
DC COM
DC COM
VIO
GRY
B14
B16
J516
1 3
POLYGON
MIRROR DRIVE
A11 A12 A13 A17
B4
B18 B20
DC COM DC COM DC COM
+5VDC
INTERLOCK
GRY
GRY
YEL YEL YEL VIO
J401
YEL
VIDEO DATA (Y) + VIDEO DATA (Y) +
LASER DIODE (Y)
POWER SIGNAL
DC300 [006-030] LASER DIODE (Y)
ENABLE (L) +5VDC
LASER DIODE (Y)
POWER CONTROL
ON (L) +5VDC
DC COM
+5VDC INTERLOCK
J516
SOS (Y)
SENSED (L) +5VDC
YEL
B15
2
DC COM
6 7 3 4 5 2 1
LDD PWB (Y)
ROS ASSY PL13.1
J529
LD DRIVE
CONTROL
LASER DIODE
LD
PD
WARNING
LASER HAZARD
NO DIRECT EXPOSURE
SOS (Y)
SENSED SIGNAL
MODULATED
LASER BEAM (Y)
ZONE
K3
ROS CONTROL
FAIL SIGNAL
ZONE
K4
1 2 3
Converts video data from ESS in resolution and video clock speed and corrects a color misregi qty by Regi Control.
Turning on DC330[006-030] makes Enable Signal on for all the colors.
Virtual Line
NOTE:
7750-270