Canon S820MG, Service Manual

Page: 95 / 205

Download Service Manual ManualsBooks
S900/ S820/ S750/ S520
Part 2: Troubleshooting
3. DISASSEMBLY AND REASSEMBLY
3.1 Cautions for Disassembly and Reassembly
3.1.1 Cautions against ink stains (ink path/ink mist)
During servicing, be careful not to touch the ink path and get ink stains on the
printer, work surface, your hands or clothing.
The ink path includes the print head's ink tank section supply inlet, the print head's
ink filter, the ink nozzles, head cap, wiper, and waste-ink absorber.
Also, in printers which have seen long-term or heavy-duty use, minute quantities of
ink rebounding off the paper surface may have led to the buildup of ink mist, coating
the platen, inside the front cover, and the purge section.
3.1.2 Damage due to static electricity
Friction with clothing can cause a build up of static electricity on the human body.
Static electricity can destroy electrical components or alter the electrical
characteristics of components.
Be extra careful when handling the logic board.
3.1.3 Deformation of spur tips
Be careful not to deform the spur tips.
The spur tips contact the paper after printing has taken place. Since the spur tips'
contact area is small, any ink adhering to the spur will be a minuscule amount which
can be wiped off by the spur cleaner so as not to dirty the paper. However, if the spur
tips are bent of out of shape, the size of the contact area with the paper increases,
along with the quantity of ink which can adhere to the spurs. If the spur cleaner
cannot completely wipe off such an amount, the spurs will stain the paper with a
dotted line.
Tr
ou
ble
sh
oo
tin
g