Gestetner A294 Service Manual page 468

SERVICE CALL CONDITIONS
SC341: TD Sensor Error 2
Definition [B]
One of the following TD sensor output voltages is detected during TD sensor
initial setting.
1) Less than 2.5 V when the maximum PWM (255) is applied to the TD sensor.
2) 2.5 V or more when minimum PWM (0) is applied to the TD sensor.
Possible Causes
• TD sensor defective
• Poor connection between the TD sensor and the BCU
• BCU defective
• Toner supply defective
SC342: TD Sensor Error 3
Definition [B]
The TD sensor output voltage is not adjusted to 2.5 ± 0.1 V within 20 seconds
during TD sensor initial setting.
Possible Causes
• TD sensor defective
• Poor connection between the TD sensor and the BCU
• BCU defective
• Toner supply defective
SC345: Development Bias Leak
Definition [B]
Maximum PWM for the development bias signal is applied 10 times
consecutively.
Possible Causes
• Poor connection between the development bias terminal and the
charge/bias/grid power pack
• Charge/bias/grid power pack
A294/A295
CÓPIA NÃO CONTROLADA
7-10
CÓPIA NÃO CONTROLADA
Rev. 9/2001
SM