Canon LBP1760P, Service Manual

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B. Initial Check
Check the following items before you diagnose malfunction. If any failure is found, the service
technician is to clear the problem and to give the instruction to the user.
1. Installation environment
Make sure that the requirements stated below meet when installing printer:
a. The power supply voltage is from -10% to +6% of the rated voltage.
b. The printer is securely installed on a level surface.
c. The room temperature is kept between 7.5
°
C and 32.5
°
C, and the relative humidity, between
5% and 90%.
d. Avoid sites generating ammonia gas, high temperature or high humidity (near water faucet,
kettle, humidifier), cold places, open flames and dusty areas.
e. Avoid sites exposed to direct sunlight. If unavoidable, advise the customer to hang curtains.
f.
A well-ventilated place.
g. Make sure that the power supply plug is inserted to the printer and the outlet.
2. Paper checks
a. The recommended paper for this printer is used.
b. The paper is not damp.
3. Paper sets
a. The paper is set to the paper source within the specified volume.
b. The paper is set to the selected paper source correctly.
4. EP-52 cartridge sets
The cartridge is set correctly.
5. Condensation
During winter, particularly when moving the printer into a warm room from a cold location such
as a warehouse, various problems can occur due to condensation in the printer.
Example)
a. Condensation in the optical system (six-faced mirror, mirror, lens, etc.) will result in the light
print images.
b. As the photosensitive drum is cold, the resistance of the photoconductive layer will be high.
This will lead to incorrect contrast.
If condensation appears, either wipe the parts with dry cloth, or leave the printer ON for 10 to
20 minutes.
If an EP-52 cartridge is opened soon after being moved from a cold room to a warm room,
condensation may appear inside the cartridge and may cause various image defects.
Be sure to instruct the customer that it is necessary to leave the cartridge sealed for one to
two hours at room temperature to allow it to acclimatise.
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CHAPTER 4