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DESCRIPTION OF OPERATIONS
3 - 11
3
3.4.3 Reset Circuit
Fig. 3-10
This circuit generates a reset signal when the power is turned ON and the power voltage is blocked or
cut off/lowered temporarily.
At the power-ON, the circuit shifts the level of the reset signal from “L” to “H” to put the CPU in a opera-
tive state after the reset pulse duration (Tpd) determined by the capacitance of C58 has passed from
when the power voltage has reached the supervisory voltage (Vs) divided by R116 and R117.
When a power voltage drop (cutoff, temporary cutoff, temporary low voltage) occurs and the power volt-
age 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.
3.4.4 Drive Circuit for Pickup Solenoid
Fig. 3-11
Pick up solenoid is a two-way solenoid that can be operated both in suction and recovery, and driven by
two transistors (Q4 and Q2) for each operation respectively.
When the PSOL-ON-Signal level is set to “L”, Q4 is turned ON, the power of 24V is applied to the coil
for suction operation, the solenoid is turned ON, and then the pickup roller goes down.
When the PSOL-ON-Signal level is set to “L”, Q2 is turned ON, the power of 24V is applied to the coil
for recovery operation, the solenoid is turned OFF, and then the pickup roller goes up.