Epson 610 manual Power Supply Circuit, Protection Circuits for Output Voltages/Currents

EPSON Perfection 610 Rev. B

2.1.3 Power Supply Circuit

Power supply circuit board in this scanner generates direct current necessary for driving the controller board and scanner engine.

See Table 2-1and Table 2-2for the power supply circuit board specifications and the protection circuits for each output voltage/current, respectively. Figure 2-5shows the power supply circuit diagram.

Table 2-1. Power Supply Circuit Board Specifications for Each Destination

Specification	Unit Part No.	Fuse
100 -120 VAC Range	2031592	2.5 A / 125 VAC
220 -240 VAC Range	2031593	T2.5AH / 250 VAC

Table 2-2. Protection Circuits for Output Voltages/Currents

Output	Output		Over Current Protection		Over Voltage Protection
Voltage	Current
5 VDC	1.2A	•	The current is held 1A or less by the	•	Shut down.
			fold-back characteristic.	• To restore, turn the scanner off and
		•	Recovers automatically*.		then back on.
				• The protection circuit becomes active
					when the voltage rises to 5.5 - 7.5
					VDC.
12 VDC	0.2A	•	The current is held 0.5 or less by the	•	Shut down.
			fold-back characteristic of the	• To restore, turn the scanner power off
			generator.		and then back on.
		•	Recovers automatically*.	• The protection circuit becomes active
					when the voltage rises to 14 -17 VDC.
24 VDC	0.7A	•	Shut down.	•	Shut down.
		• To restore, turn the scanner power off		• To restore, turn the scanner power off
			and then back on.		and then back on.
				• The protection circuit becomes active
					when the voltage rises to 28 -33 VDC.

*: Recovers within 5 minutes.

NOTE: If any of the outputs is shut down, all the other outputs are also shut down.

Operating Principles Engine Mechanism 18