Page 28 - MF3010Series Service Manual (Rev.0) (1)-017-045 (1)

2 Technical Overview > External And Controls System > Power Supply > Protective Functions
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External And Controls System ■ Protective Functions

● Power protective function
Power Supply Low voltage power circuit carries the overcurrent preventive function against and overvoltage
preventive function that block the voltage output automatically to prevent the power circuit
■ Power Supply brokerage when the overcurrent or overvoltage occur due to load errors such as short circuit
etc.
3.3V
Engine Controller PCB Thus, when the DC power cannot be output from the low voltage circuit, the protective
function against overcurrent or overvoltage may be working. Turn OFF the Power Switch
Power Protection (SW1100) to fix load errors and turn ON the Power Switch (SW1100) again (see CAUTION).
Supply Circuit Fixing Assembly Also the circuit carries the 4 fuses (FU101, FU201, FU202, FU203) as another preventive
Assembly
function. The fuses blow to block the power supply when overcurrent occurs in AC line.
3.3V 24V SW501
Laser Scanner Unit CAUTION:
When restoring the low voltage power after protective function is activated, leave it for
SW1100 FU101 FU201 5.7V 2 minutes or more from turning off the Power Switch (SW1100) or plugging out before
FU202 FU203 24V Motor Driver PCB turning ON.

24V ● Safety function
24V 3.3V Main Motor The host machine equips the function of stopping 24V in part of the high voltage power unit to
(M1) avoid users and engineers from getting burned or electric shock.
When the cartridge door is opened, the Door Switch (SW501) is turned off and 24V supplied
to the high voltage power unit is shut.
5.5V Reader Motor
24V (M3) Engine controller CPU determines the door open when the Door Switch (SW501) is turned
OFF.

24V Pickup Solenoid
(SL1)
3.3V
3.3V
DC/DC 5.5V Control Panel Unit
Converter 5.5V
1.0V
3.3V
5.5V CIS Unit
Main Controller PCB
F-2-33

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2 Technical Overview > External And Controls System > Power Supply > Protective Functions