MR-2012 OPERATIONAL DESCRIPTION
3 - 2
October 2000 © TOSHIBA TEC
3.3 Detection of Abnormal Status
3.3.1 Cover open/Close detection
When the ADF top cover is opened, the contact of the ADF top cover open switch changes to cut the
supply of 24V to the motor and sends a cover open detection signal to the scanner PWA.
3.3.2 Feeder jam detection
The number of pulses (time) equivalent to the distance (
) from the document set position to the ADF
registration sensor ON position plus 300 mm is regarded as timing for detecting a jam. When the time from
the moment of starting paper feed to the moment when the ADF registration sensor is turned ON exceeds
that value, a jam in the feeder will be detected.
3.3.3 ADF registration sensor stay jam detection
The number of pulses (time) equivalent to the distance obtained by subtracting 115 mm (
+
) from the
document length plus 30 mm (1115 mm for long mode) is regarded as timing for detecting a jam. When the
time from the moment when the ADF exit sensor is turned ON to the moment when the ADF registration
sensor is turned OFF exceeds that value, a ADF registration sensor stay jam will be detected.
3.3.4 ADF read sensor unreached jam detection
The number of pulses (time) equivalent to the distance (
) from the ADF registration sensor to the ADF
read sensor plus 30 mm is regarded as timing for detecting a jam. When the time from the moment of
starting the transport of the document having reached the ADF registration sensor to the moment when the
ADF read sensor is turned ON exceeds that value, an ADF read sensor unreached jam will be detected.
3.3.5 ADF read sensor stay jam detection
The number of pulses (time) equivalent to the distance (
) from the ADF registration sensor to the ADF
read sensor plus 30 mm is regarded as timing for detecting a jam. When the time taken after the end of the
document passes the ADF registration sensor exceeds that value, an ADF read sensor stay jam will be
detected.
3.3.6 ADF exit sensor unreached jam detection
The number of pulses (time) equivalent to the distance (
) from the moment when the ADF read sensor is
turned ON to the moment when the exit sensor is turned ON plus 35 mm is regarded as timing for detecting
a jam. When the time taken after the top of the document passes the ADF read sensor exceeds that value,
an ADF exit sensor unreached jam will be detected.
ADF registration sensor
ADF read sensor
ADF exit sensor
Document empty sensor
adf 03-03-06