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LD Safety Switch
A relay on the PSU ensures technician and user safety. It also prevents the laser beam from turning on
during servicing. This relay turns off when the front cover, upper left cover, or right door is opened. At
this time it cuts the power (+5V) supplied to the LD board for each color through the IPU.
Two safety switches are turned on or off by the front door or right door, and this opens the relay.
• LD Driver: Precise Pulse Modulation ASIC on C-MOS technology
• LDB: LD Drive Board (included in the LD Unit)
Error Messages
Along with other switches, the LD safety switches help show error messages related to external covers.
When one or more covers are open, the messages, "Cover is open." and "Close the indicated cover,"
show with a diagram. The diagram shows which cover is open.
Laser Optics Housing Unit
• Before installing a new laser optics housing unit, remove the sponge padding and the tag from the
new unit.
Laser Optics
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Summary of Contents for AP-C3
Page 1: ...Model AP C3 Machine Code D143 D144 Field Service Manual January 2012 Subject to change...
Page 2: ......
Page 24: ...22...
Page 26: ...Product Overview Component Layout 1 Product Information 24...
Page 36: ...1 Product Information 34...
Page 130: ...11 Reassemble the machine 2 Installation 128...
Page 158: ...2 Installation 156...
Page 249: ...21 Pulley A timing belt 22 Gear unit A x 8 Drive Unit 247...
Page 259: ...5 Disconnect the connector A x 1 x 1 6 Duplex by pass motor bracket A x 2 Drive Unit 257...
Page 268: ...6 Development clutch K A x 1 4 Replacement and Adjustment 266...
Page 323: ...5 Remove the controller box stay A x 4 6 IOB bracket A x 4 x All Electrical Components 321...
Page 336: ...2 Controller board A x 7 x 3 4 Replacement and Adjustment 334...
Page 366: ...3 Remove the bracket A x 1 x 1 4 Release the harness A x 1 4 Replacement and Adjustment 364...
Page 880: ...6 Troubleshooting 878...
Page 890: ...Flow Chart for the Toner End Recovery Error 6 Troubleshooting 888...
Page 908: ...Sensor Locations 6 Troubleshooting 906...
Page 922: ...6 Duplex with combine mode SP 8421 005 pages 7 Energy Saving 920...
Page 923: ...Model AP C3 Machine Code D143 D144 Appendices January 2012 Revised...
Page 924: ......
Page 928: ...4...
Page 960: ...1 Appendices 36...
Page 1330: ...1106 1 Toner Limit Value CTL 100 to 400 260 1 step 3 SP Mode Tables 406...