Panasonic UF-6300 Service Manual page 200

+24V
LVPS
(Power Supply Unit)
6.2.12 Laser Unit (LSU) Control Circuit
The laser control signals are described below.
nLDEN
The LSU is activated when this output signal is LOW. If an error occurs, the nLDEN output signal level
goes High and the LSU is deactivated.
nVIDEO
This is the actual Data Signal. The Laser is ON when the nVIDEO output signal level is LOW.
nHSYNC
This horizontal synchronization signal transmitted from the Beam Detection Sensor sets the horizontal
position of the laser beam as it crosses the OPC Drum.
nSTART
This is the Scanner Motor Control Signal. The Scanner Motor rotates when the nSTART output signal
level is LOW.
nREADY
A Phased-Lock Loop (PLL) circuit keeps the Scanner Motor speed constant when the nREADY is at a
Low output signal level.
CLK
This is the Scanner Motor Clock.
+24V
Rush Current
Protection Circuit
pMPOW
DC/DC
Converter
(SC PCB)
Interlock Safety Circuit Block Diagram
+24V
+24VD
+24VM
Motor
+24VM
+24VM
Paper Feed Solenoid
+24VM
L+5V
200
Cover
ILS PCB
HVPS
(Power Supply Unit)
Laser Unit