Table 1-8 Converted DC voltages
Main DC voltage Sub-voltage Behavior
+24V +24VA Stopped during Sleep (powersave)
mode
+24VB Interrupted when the front door or right
door open
Stopped during Sleep (powersave)
mode
+5V +5VA Constantly supplied
3.3V is supplied during Sleep mode 2
or Sleep mode 3
+5VB 3.3V is supplied during Sleep mode 2
Stopped during Sleep mode 3
Power for the formatter
+5VC 3.3V is supplied during Sleep mode 2
or Sleep mode 3
Interrupted when the front door or right
door open (SW1/SW2)
+5VD Stopped during Sleep mode
Interrupted when the front door or right
door open (SW1/SW2)
+3.3 V 3.3VA Constantly supplied
3.3VB Stopped only when the power is off
Power for the formatter
3.3VC Stopped during Sleep mode 2 or Sleep
mode 3
●
24V Power Supply (24VRMT) signal: Controls supply or interruption of +24VA
●
5V Power supply (VC5VOFF) signal: Controls supply or interruption of +5VB
●
3V Power supply (VC3VOFF) signal: Controls supply or interruption of +3.3VB
●
Voltage conversion (PWRSAVE) signal: Converts output voltage of +5VA, +5VB and +5VC into
+3.3V
Overcurrent/overvoltage protection
The low-voltage power supply stops supplying the DC voltage to the product components whenever it
detects excessive current or abnormal voltage from the power source.
12 Chapter 1 Theory of operation ENWW
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