Panasonic DP-3000 Technical Manual page 33
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Also See for DP-3000:
- Operating instructions manual (199 pages) ,
- User manual (105 pages) ,
- Service manual (9 pages)
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7. LSU Control Circuit
The laser control signals are described below.
Actual data is sent from SC PCB to LSU.
VIDEO+
:
Actual data is outputted by these 2 signals.
VIDEO-
nS/H
:
Laser Power Sample/Hold Timing Signal.
nHSYNC :
This horizontal synchronization signal transmitted from the Beam Detection Sen-
sor sets the horizontal position of the laser beam as it crosses the OPC Drum.
nLDON
:
The LSU is activated when this output signal is LOW. If an error occurs, the
nLDON output signal level goes High and the LSU is deactivated.
pLDCTL
:
This signal turns ON the laser output to activate nHSYNC signal.
VCON
:
This is the Analog Voltage for adjusting Laser output power.
nPMCK
:
This is the Polygon Motor Drive Clock.
nPMRDY :
When the Polygon Motor speed is constant, the nPMRDY is at a Low output sig-
nal level.
nPMON
:
This is the Polygon Motor Control Signal. The Polygon Motor rotates when the
nPMON output signal level is LOW.
VIDEO DATA
IC101
CPU
IC47
IC46
+5V
IC702
IC702
IC701
R371
R365
R369
Q305
SC PCB
IC49
3
4
LPC PCB
CN701
R331
1
nS/H
2
nHSYNC
R358
5
nLDON
R333
6
pLDCTL
8
VCONT
R364
nPMCK
R370
R335
10
nPMRDY
9
nPMCK
11
nPMON
Q304
33
Laser
Control
Laser
Circuit
Timing
Sensor
Motor
Drive
Circuit
Scanner
Motor
Laser Unit (LSU)
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