How To Handle The Laser Scanner Unit; Points To Note When Replacing/Discarding A Lithium Battery; Points To Note When Performing Disassembly/Assembly - Canon imageCLASS LBP6780dn Service Manual

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Safety Precautions > Safety Information > Points to Note when Performing Disassembly/Assembly Safety Precautions

How to Handle the Laser Scanner Unit

An invisible laser beam is irradiated in the laser scanner unit.
If the laser beam enters an eye, it may cause damage to the eye. So, be sure not to
disassemble the laser scanner unit. No adjustment can be made to the laser scanner unit in
this machine in the field.
The label shown in the following figure is attached to the bottom of the laser scanner unit.
Points to Note when Replacing/Discarding a Lithium
Battery
The main controller PCB in this machine contains a lithium battery as backup power supply
for various data just in the case when a blackout occurs or the power plug is removed.
CAUTION:
If the battery is replaced with an incorrect type of battery, it may cause an explosion.
Discard a used battery according to the instruction manual.
0 Safety Precautions Safety Precautions > Safety Information > Points to Note when Performing Disassembly/Assembly

Points to Note when Performing Disassembly/Assembly

The service technician is to identify the cause of printer failures according to the "Chapter 5
TROUBLESHOOTING"
on Page 3-1-1 and to follow the disassembly procedures of each part to replace the defective
parts or the consumable parts.
Note the following precautions when working on the printer.
1. CAUTION: Before disassembling or reassembling the printer, be sure to disconnect its
power cord from the electrical outlet
2. During disassembly, reassembly or transportation of the printer, remove the cartridge if
required.
When the cartridge is out of the printer, put it in a protective bag even in a short period of
time to prevent the adverse effect of light.
3. Reassembling procedures are followed by the reverse of disassembly unless otherwise
specified.
4. Note the length, diameters, and locations of screws as you remove them. When
reassembling the printer, be sure to use them in their original locations.
5. Do not run the printer with any parts removed as a general rule.
6. Ground yourself by touching the metal part of the printer before handling the PCB to
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reduce the possibility of damage caused by static electricity.
7. When you replace the part that the rating plate or the product code label is attached, be
sure to remove the rating plate or the product code label and put it to the new part.
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