Laser Exposure
D009/D011/D012/D013 6-24
SM
The front door and right door are equipped with safety switches that automatically
shut down the laser unit when either door is opened.
6.6.2 AUTO POWER CONTROL (APC)
The LD driver on the LDDR drives the laser diode. Even if a constant electric current is
applied to the laser diode, the intensity of the output light changes with the temperature. The
intensity of the output decreases as the temperature increases.
In order to keep the output level constant, the LDDR monitors the electrical current passing
through the photodiode (PD). Then it increases or decreases the current to the laser diode
as necessary, comparing it with the reference level. This auto power control is done just after
the machine is turned on and during printing while the laser diode is active.
The reference levels are adjusted on the production line. Do not touch the variable resistors
on the LDDR in the field.
6.6.3 LD SAFETY SWITCHES
PSU: Power Supply Unit
MB:
Mother
Board
BICU: Base-engine and Image Control Unit
LDB: LD Drive Board
The relays on the power supply unit (PSU) ensure technician and user safety and prevent
the laser beam from inadvertently switching on during servicing. These relays turn off when
the front cover or right door is opened, and cuts the power (+5V) supplied to the LD Board
through the BICU.
Summary of Contents for D009
Page 1: ...D009 D011 D012 D013 SERVICE MANUAL 003315MIU...
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Page 3: ...D009 D011 D012 D013 SERVICE MANUAL...
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Page 5: ...D009 D011 D012 D013 SERVICE MANUAL 003315MIU...
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Page 33: ...INSTALLATION...
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Page 119: ...PREVENTIVE MAINTENANCE...
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Page 129: ...REPLACEMENT AND ADJUSTMENT...
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Page 225: ...TROUBLESHOOTING...
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Page 285: ...SERVICE TABLES...
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Page 549: ...DETAILED SECTION DESCRIPTIONS...
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Page 605: ...Duplex Unit SM 6 55 D009 D011 D012 D013 Detailed Descriptions...
Page 636: ......
Page 637: ...SPECIFICATIONS...
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Page 657: ...1000 SHEET FINISHER B408...
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Page 685: ...AUTO REVERSE DOCUMENT FEEDER DF3010 B802...
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Page 692: ...Covers and Tray B802 2 SM 4 Pivot cover A x 1 5 Original tray B x 1 x 1 x 2...
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Page 723: ...BOOKLET FINISHER SR3020 FINISHER SR3030 B804 B805...
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Page 746: ...Fold Unit B804 B805 18 SM...
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Page 803: ...SCANNER ACCESSIBILITY OPTION TYPE 4045 B838...
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Page 841: ...FAX OPTION TYPE 5000 D346...
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Page 1025: ...PAPER FEED UNIT PB3040 D351...
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Page 1047: ...LCIT PB3050 D352...
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Page 1073: ...1200 SHEET LCIT RT3000 D353...
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Page 1099: ...PRINTER SCANNER OPTION TYPE 5000 D381...
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Page 1139: ...BRIDGE UNIT BU3030 D386...
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Page 1155: ...1 BIN TRAY BN3040 D389...
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