Gestetner B070 Service Manual page 333

SC340: TD Sensor Error 1 (Vt Measurement Error)
Definition [B]
The TD sensor output voltage is detected less than 0.5 V or more than 4.0 V for 10
continuous copies.
Possible Causes
• TD sensor defective
• TD sensor harness defective
• TD sensor connector defective
• IOB defective
• Toner supply defective; check the toner supply path from the toner bank
through to the hopper
• BCU defective
SC341: TD Sensor Error 2 (TD Sensor Control Voltage Abnormal)
Definition [B]
One of the following TD sensor output voltages is detected during TD sensor initial
setting.
• Less than 2.5 V when the maximum PWM (255) is applied to the TD sensor.
• 2.5 V or more when minimum PWM (0) is applied to the TD sensor.
NOTE: When an abnormal condition is detected, "0" is displayed for SP2906
(Vcont Manual Setting).
Possible Causes
• TD sensor defective
• TD sensor harness defective
• TD sensor connector defective
• IOB defective
• Toner supply defective; check the toner supply path from the toner bank
through to the hopper
• BCU defective
SM
CÓPIA NÃO CONTROLADA
4-13
CÓPIA NÃO CONTROLADA
SERVICE CALL CONDITIONS
B070/B071