Power supply voltage detection
The power supply voltage detection controls the fuser properly according to the voltage. The DC
controller detects whether the low-voltage power supply voltage is 100V or 220V, according to the
POWER SUPPLY VOLTAGE signal (/PSTYP100).
Sleep mode
The Sleep mode reduces the power consumption of the product. There are three types of sleep modes:
●
Sleep level 1
The DC controller stops the power supply of +24V according to the +24V CONTROL signal
(RMT_24V) and POWER FACTOR CORRECTION ACTIVATE signal (RMT_PFC), after a specified
period of time from when a sleep command signal is sent from the formatter. The DC controller
su24V and the product exits sleep level 1 when a recover signal is sent from the formatter.
●
Active off
The DC controller stops the power supply to the formatter, except for +3.3VA and +3.3VB, when
an Active off command signal is sent from the formatter during sleep level 1 or STBY period. The
DC controller supplies all power supplies and the product exits Active off when a recover signal is
sent from the formatter or the power switch is depressed for less than three seconds.
●
Inactive off
The DC controller stops the power supplies to the formatter, except for +3.3VA, when an Inactive
off command signal is sent from the formatter during sleep level 1 or STBY period. The product
enters Inactive off when the power switch is depressed for more than three seconds. The DC
controller supplies all power supplies and the product exits Inactive off when a recover signal is
sent from the formatter or the power switch is depressed for less than three seconds.
Power supply illumination control
The DC controller changes the light of the LED (power supply illumination) for the power switch
according to the power supply condition as follows:
●
Lighting-up: STBY period or sleep level 1
●
Blinking: Active off
●
Lighting-out: Inactive off
ENWW
Engine control system
13
Summary of Contents for LASERJET ENTERPRISE MFP M725dn
Page 1: ...LASERJET ENTERPRISE MFP M725 Troubleshooting Manual M725z M725dn M725f M725z ...
Page 2: ......
Page 3: ...HP LaserJet Enterprise MFP M725 Troubleshooting Manual ...
Page 6: ...iv Conventions used in this guide ENWW ...
Page 32: ...xxx ENWW ...
Page 142: ...110 Chapter 1 Theory of operation ENWW ...
Page 457: ...4 Close the fuser jam access cover 5 Close the fuser door ENWW Clear jams 425 ...
Page 475: ...1 Lift the document feeder latch 2 Open the document feeder cover ENWW Clean the product 443 ...
Page 516: ...484 Appendix A Service and support ENWW ...
Page 545: ......
Page 546: ... 2013 Hewlett Packard Development Company L P www hp com CF066 91023 CF066 91023 CF066 91023 ...