Gestetner A294 Service Manual page 482

SERVICE CALL CONDITIONS
SC546: Fusing Ready Temperature Malfunction
Definition [A]
The fusing temperature twice consecutively is detected 20°C lower or 20°C
higher than the temperature 1 second earlier.
Possible Causes
• Poor thermistor connector connection
• Poor fusing unit connection
SC547: Zero Cross Signal Malfunction
Definition [A]
When one of the following conditions is detected 10 times consecutively.
1) More than 66 or fewer than 45 zero-cross signals in 500 ms.
2) An interval between zero-cross signals shorter than 7.5 ms is detected 3
times in 500 ms.
Possible Causes
• Noise on the ac power line
SC550: Oil Supply/Cleaning Web End
Definition [A]
The oil supply/cleaning web end sensor stays on for 500 ms after the oil
supply/web end motor starts.
Possible Causes
• Oil supply/cleaning web end
• Oil supply/cleaning web motor defective
SC591: Toner Supply Motor Lock
Definition [B]
The used toner supply motor sensor status or development suction motor
sensor does not change for 1 second while the toner supply motor is
energized.
Possible Causes
• Used toner supply motor or development suction motor defective
• Used toner supply motor sensor or development suction motor sensor
defective
• BCU defective
A294/A295
CÓPIA NÃO CONTROLADA
7-24
CÓPIA NÃO CONTROLADA
Rev. 9/2001
SM