Canon LBP7780CX User Manual page 102

If you cannot place the printer on the paper feeder properly, lift the printer once, hold it horizontally, and place it
again.
If you try to place the printer forcefully without lifting it, the connector and positioning pins may be broken.
Be sure to turn the printer ON once when loading paper in the paper drawer for the first time after installing the
paper feeder.
Precautions when installing/removing ROM
Be sure not to touch the switches on the main board. If you change the switches, the printer does not operate
properly.
Observe the following precautions when handling ROM to prevent damage from static electricity.
Touch a metal object to dissipate static electricity before handling them.
When handling ROM, do not touch anything that generates static electricity such as the computer display.
Do not touch the main board parts, printed wire, or connectors with your hands.
Take ROM out of the protective bag right before it is installed.
When installing ROM, be careful so that any metal objects such as screws do not touch the main board.
If any of screws, clips, staples, and so on should drop inside the printer, do not plug the power plug in the AC
power outlet and contact your local authorized Canon dealer.
Do not turn the printer ON without the slot cover attached. This may result in damage to the printer.
NOTE
About the toner cartridge included with this printer
The average yield of the included toner cartridges is as follows.
Average yield of K (Black) toner cartridge: 6,100 pages
Average yield of Composite C (Cyan), M (Magenta), and Y (Yellow) toner cartridges: 6,400 pages
*1
The average yield is on the basis of "ISO/IEC 19798"* when printing A4 size paper with the default print
density setting.
* "ISO/IEC 19798" is the global standard related to "Method for the determination of toner cartridge yield for
color printers and multi-function devices that contain printer components" issued by ISO (International
Organization for Standardization).
For purchasing replacement toner cartridges, see "Consumables."
*1
*1