Toshiba e-STUDIO555 Service Manual page 331

[F] Original reverse solenoid/Original exit solenoid control circuit
Fig. 15-10
The original reverse solenoid is a solenoid that drives the flapper to switch the path, to which originals
are to be transported, to either the reverse paper path or the exit paper path when double-sided
originals are scanned. It is driven by the transistor (Q16). When the level of the GSOL-ON signal is set
to "L", the flapper goes down and the original is transported to the reverse paper path.
The original exit solenoid is a solenoid that drives the flapper to switch the path, to which originals are to
exit, to either the original reverse tray or the original exit tray. It is driven by the transistor (Q17). When
the level of the SBSOL-ON signal is set to "L", and the original is transported to the original reverse tray.
[G] Reset circuit
Fig. 15-11
This circuit generates a reset signal when the power is turned ON and when the power voltage is
blocked or cut off/lowered temporarily. At the power-ON, the circuit shifts the level of the reset signal
(RESET) from "L" to "H" to put the CPU in a operative state after the reset pulse duration (Tpd)
15
determined by the capacitance of C144 has passed from when the power voltage has reached the
supervisory voltage (Vs) divided by R162 and R159. When a power voltage drop (cutoff, temporary
cutoff, temporary low voltage) occurs and the power voltage becomes lower than the set value for the
supervisory voltage for the power, the circuit sets the level of the reset signal (RESET) to "L" to put the
CPU in a halt state.
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REVERSING AUTOMATIC DOCUMENT FEEDER (RADF)
15 - 13