Dell 3110cn Service Manual page 568

Signal line name
LV TYPE
DEEP SLEEP
SLEEP
24V OFF
FAN STOP
FAN LOW
FAN ALARM
- LVPS overcurrent protection circuit
This circuit stops all outputs, if the power supply voltage 24VDC, 5VDC, or 3.3VDC is shorted.
The circuit is reset, when after the cause of short was removed, the power is turned off, and then
on again after certain time.
- LVPS overvoltage protection circuit
This circuit stops all outputs, if the power supply voltage 24VDC, 5VDC, or 3.3VDC exceeds the
specified voltage respectively.
At this time, the operating point is 32VDC(TBD) or less for 24VDC, 7VDC(TBD) or less for 5VDC,
or 4.4VDC(TBD) or less for 3.3VDC.
The circuit is reset, when the power is turned off, and then on again after certain time.
- Sleep mode and deep sleep mode
The output of the following power supply are stopped according to the these signals.
Version 1 2006.01.30
Control signal of the LVPS
Drive control signal of the SIDE FAN
Output
Signal
Sleep
Deep sleep
Chapter 7 Wiring Diagrams and Signal Information
Description
+24VDC +5VDC
OFF OFF
OFF OFF
7 - 8
+3.3VDC
ON
OFF