Chapter 6 Troubleshooting; Introduction; Initial Check - Brother 1240 Service Manual

CHAPTER 6 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.]
The print paper is short-grained paper or acid paper. [If so, print quality problems may
occur.]
For further information on paper, refer to
(3) Consumable parts
Check if :
The Toner LED is not lit on the printer control panel when a toner cartridge is installed in
the printer. [If the LED is lit, replace the cartridge with a new one.]
For further information on consumable parts, refer to
CHAPTER
(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.
5.
subsection 3.5 'Paper' in CHAPTER
Section 1 'Consumable Parts' in
6-1

CHAPTER 6 TROUBLESHOOTING

1.