Canon LASER SHOT LBP-1210, Руководство по обслуживанию

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II-4. All black
<Possible causes>
1) Poor contact in the primary charging bias contact on the engine controller PCB and the car-
tridge contact.
Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are
deformed or damaged, replace any defective parts.
2) The primary charging roller is defective.
Action: Replace the cartridge.
3) The engine controller PCB is defective.
Action: Replace the engine controller PCB.
II-5. Dots in vertical line
<Possible causes>
1) Dirty static charge eliminator
Action: Clean the eliminator with brush.
2) Poor contact in the static charge eliminator contact on the engine controller PCB and the
static charge eliminator contact.
Action: : Clean the contacts if dirty. If the problem remains after cleaning, or parts are
deformed or damaged, replace any defective parts.
3) Deformation or deterioration of the transfer charging roller
Action: Replace the transfer charging roller.
4) Poor contact in the transfer charging bias contact on the engine controller PCB and the
transfer charging roller shaft contact
Action: Clean the contacts if dirty. If the problem remains after cleaning, or parts are
deformed or damaged, replace any defective parts.
5) The engine controller PCB is defective.
Action: Replace the engine controller PCB.
II-6. Dirt on back of paper
<Possible causes>
1) Dirty paper
Action: Replace the dirty paper to new one. Also, instruct the customer on how to store
paper.
2) The separation pad is dirty.
Action: Clean the pad if dirty. If dirt cannot be removed, replace the pad.
3) There is periodic dirt (the transfer charging roller or the pressure roller).
Action: Identify the dirty part according to Table 4-2-2 on page 4-11 and clean it. If dirt
CHAPTER 4
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