Brother International HL-1070 Service Manual - Page 65

Iv, Maintenance And Troubleshooting, Introduction

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CHAPTER IV MAINTENANCE AND TROUBLESHOOTING 1. INTRODUCTION 1.1 Initial Check (1) Operating environment Check if : • The source voltage stays within ±10% from the rated voltage shown on the rating plate. • The printer is installed on a solid, level surface. • The room temperature is maintained between 10°C and 32.5°C. The relative humidity is maintained between 20% and 80%. • The printer is not located in a dusty place. • The printer is not exposed to ammonia fumes or other harmful gases. • The printer is not located in a hot or humid area (such as near water or a humidifier). • The printer is not exposed to direct sunlight. • The room is well-ventilated. • The printer is not placed where the ventilation hole of the printer is blocked. (2) Print paper Check if : • A recommended type of print paper is being used (if the paper is too thick or too thin, or tends to curl, paper jams or paper feed problems may occur, or printed images may be blurred). • The print paper is damped. [If so, use fresh paper, and check whether the print quality improves or not.] (3) Consumables Check if : • The Toner lamp is not lit on the control panel when a toner cartridge is installed in the printer. [If the above lamp is lit, replace the cartridge with a new one. If blank spots occur on printouts, take out the drum unit and slowly rock it to redistribute the toner evenly.] (4) Others Condensation: When the printer is moved from a cold room into a warm room in cold weather, condensation may occur inside the printer, causing various problems as listed below: • Condensation on the optical surfaces such as the scanning mirror, lenses, the reflection mirror and the protection glass may cause the print image to be light. • If the photosensitive drum is cold, the electrical resistance of the photosensitive layer is increased, making it impossible to obtain the correct contrast when printing. • Condensation on the corona unit may cause corona charge leakage. • Condensation on the hopper gate and separation pad may cause paper feed troubles. IV-1

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IV-1
CHAPTER IV
MAINTENANCE AND TROUBLESHOOTING
1.
INTRODUCTION
1.1
Initial Check
(1)
Operating environment
Check if :
• The source voltage stays within ±10% from the rated voltage shown on the rating
plate.
• The printer is installed on a solid, level surface.
• The room temperature is maintained between 10°C and 32.5°C. The relative
humidity is maintained between 20% and 80%.
• The printer is not located in a dusty place.
• The printer is not exposed to ammonia fumes or other harmful gases.
• The printer is not located in a hot or humid area (such as near water or a
humidifier).
• The printer is not exposed to direct sunlight.
• The room is well-ventilated.
• The printer is not placed where the ventilation hole of the printer is blocked.
(2)
Print paper
Check if :
• A recommended type of print paper is being used (if the paper is too thick or too
thin, or tends to curl, paper jams or paper feed problems may occur, or printed
images may be blurred).
• The print paper is damped. [If so, use fresh paper, and check whether the print
quality improves or not.]
(3)
Consumables
Check if :
• The Toner lamp is not lit on the control panel when a toner cartridge is installed in
the printer. [If the above lamp is lit, replace the cartridge with a new one. If blank
spots occur on printouts, take out the drum unit and slowly rock it to redistribute
the toner evenly.]
(4)
Others
Condensation:
When the printer is moved from a cold room into a warm room in cold weather,
condensation may occur inside the printer, causing various problems as listed
below:
• Condensation on the optical surfaces such as the scanning mirror, lenses, the
reflection mirror and the protection glass may cause the print image to be light.
• If the photosensitive drum is cold, the electrical resistance of the photosensitive
layer is increased, making it impossible to obtain the correct contrast when
printing.
• Condensation on the corona unit may cause corona charge leakage.
• Condensation on the hopper gate and separation pad may cause paper feed
troubles.