Toshiba e-STUDIO520 Service Manual page 413

5) Drive circuit for large original exit roller release solenoid (SOL6), small original exit solenoid (SOL4)
and large original exit solenoid (SOL5)
This circuit controls the closing/opening of the flappers of the large original exit roller release sole-
noid, small original exit and large original exit solenoids (SOL6, SOL4, SOL5).
When the level of ESSOL, SSOL, LSOL is "H", Q9, Q10, Q11 are turned ON and the flappers are
closed. The drive signal for the large original exit roller release solenoid (SOL6) is a PWM signal.
The flappers are closed in the maximum torque of the solenoids and the duty value becomes 100%
when the flappers start to be closed. After finishing closing, the duty value is decreased down to
50% and the flappers are kept closed while the temperature rise of the solenoids is being lowered.
6) Reset circuit
This circuit generates a CPU reset signal when the power is turned ON and the power voltage is
detected to have become lower.
The level of IC5-6 pin (OUT) is normally "H" after the power is turned ON. However, when the power
is turned OFF or the voltage of the +5 V power supply is decreased to 4.25V or lower for some rea-
son, the level of IC5-6 pin becomes "L" and the CPU is reset.
March 2005 © TOSHIBA TEC
Fig.16-98
Fig.16-99
e-STUDIO520/600/720/850 REVERSING AUTOMATIC DOCUMENT FEEDER (RADF)
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