CHAPTER 4
B. Initial Check
Check the following items before making a diagnosis of 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
b.The printer is securely installed on a level surface.
c.The room temperature is kept between 10°C and 32.5°C, and the relative humidity, between 20% and 80%.
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
g.Make sure that the power plug is inserted to the printer and the outlet securely.
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
b.The paper is set to the selected
c.The cassette is installed in the printer correctly.
4. EP-72 cartridge sets
The cartridge is installed in the printer 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
b.As the photosensitive drum is cold, the resistance of the photoconductive layer is high. This will lead to incorrect contrast.
If condensation appears, leave the printer ON for 10 to 20 minutes.
If a cartridge is opened soon after being moved from a cold room to a warm room, condensa- tion 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 acclimatize.
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