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Technical Overview > Engine Control System > Low-voltage Power Supply > Power-Saving Mode
Technical Overview > Engine Control System > Low-voltage Power Supply > Power-Saving Mode
Protective Function
The Low-voltage Power Supply has a protective function against overcurrent and overvoltage
to prevent failures in the power supply circuit. If there flows an overcurrent or an overvoltage,
the system automatically cuts off the output voltage.
If the DC Power is not being supplied from the Low-voltage Power Supply, the protective
function may
be running. In such case, turn off the power switch and unplug the power cord. Do not plug in
the power cord or turn the power switch on again until the root cause is found.
In addition, two fuses in the Low-voltage Power Supply protect against overcurrent.
If overcurrent lows into the AC line, the fuse blows and cuts off the power distribution.
Safety
For user and service technician's safety, the printer has a function to interrupt 24V power
supply.
The door switch is turned off and 24V power supply to the Fixing Unit and the High-voltage
Power Supply Unit stops under the following condition:
If the cartridge door is opened (SW2 is turned off)
Low-voltage Power Supply Unit Failure Detection
The DC Controller determines a Low-voltage power supply unit failure and stops +24V output.
Once 24V output is stopped, 3.3V of the engine CPU stops, so notification is not made.
Likely, 3.3V of the controller stops, so the machine seems power-off.
+24V is higher than a specified voltage
+3.3V is higher than a specified voltage
+5V is higher than a specified voltage
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Power-Saving Mode
This is the function to save power consumed by the printer.
The table below lists various power-saving modes.
Power-Saving Mode
Status
Stand-by
at power-OFF on the reader
Power-saving (3W)
at power-off on the reader, the engine and the display (LCD)
The main controller enters the power-saving mode.
Power-OFF
Power-ON
Standby
Reader
Operation
panel
Engine
Main
controller
Power-ON status
Power-saving status
Power-OFF status
[1]
[3]
[4]
[2]
Power-
saving
Power-OFF
Service
error
Printing
Service error
The condition that
there is no service error.
[1] Press [Power-saving] key.
(Power-saving release)
[3]
Detects hook.
[2]
Enters auto-sleep status.
[4] Start / complete jobs.
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