Xerox WorkCentre 5687 Series, Service Manual, Page: 249 / 2320

August 2007
2-57
WorkCentre 5687 Family
01K
Status Indicator RAPs
01K Sleep Mode RAP
Use this RAP to diagnose problems entering or exiting sleep mode.
Sleep Mode Operation
The machine is designed to be energy efficient by reducing the power consumption after peri-
ods of inactivity. The machine has three power modes:
• Standby or run mode - full power consumption. In this mode, the power save LED, Figure
1, is not illuminated.
• Low power mode - the fuser temperature is reduced to save power, yet allow a quick
return to run temperature. In this mode, the power save LED, Figure 1, is illuminated.
• Sleep mode - power consumption for the whole machine is reduced to below 10 watts by
powering down all but the essential parts, see the note below. In this mode, the power
save LED, Figure 1, is blinking.
NOTE: When the machine is in sleep mode, +3.3V sleep and +12V sleep are supplied
from a special power supply located within the LVPS. These voltages are used to power
the PWBs that follow:
– Fax PWB.
– Firewire PWB.
– UI PWB.
– The network controller is also powered as relay K2 on the LVPS is energized in
sleep mode.
Off to Run Mode
When the On/off button is pressed, the IOT PWB sends the PS ON signal to the LVPS to
power-on the machine. The PS ON signal is diode coupled within the LVPS to the sleep signal,
therefore whenever the main power supply is on, the sleep mode power supply is on. When the
machine is in run mode the IOT watchdog signal and the SIP watchdog signal keep the PS ON
signal active.
Run Mode to Sleep Mode
After a period of machine inactivity that equates to the sum of the low power mode duration
plus the sleep mode duration, as set in the customer tools options, both the SIP and IOT
watchdogs are stopped. After approximately 4.5 seconds the PS ON signal goes inactive,
causing the main power supply to switch off. Before the SIP and IOT stop their watchdogs, the
UI watchdog is started, this causes the sleep signal to be active; this in turn keeps the sleep
mode power supply on when the main power supply switches off.
Sleep Mode to Run Mode
Exit from sleep mode requires one of the wake events that follows to occur:
• An operator presses the on/off switch. This causes the IOT to generate the PS ON signal
to the LVPS to power-on the machine.
• An operator touches the UI screen or presses any UI buttons. This causes the UI to gen-
erate the wake signal. The wake signal is passed through the image processing PWB to
the IOT. This causes the IOT to generate the PS ON signal to the LVPS to power-on the
machine.
• An incoming Fax job. The Fax PWB will generate a power management event signal that
is passed through the riser PWB and image processing PWB to the IOT. This causes the
IOT to generate the PS ON signal to the LVPS to power-on the machine.
• An incoming print job at the network controller is passed to the firewire PWB. The firewire
PWB will generate a power management event signal that is passed through the riser
PWB and image processing PWB to the IOT. This causes the IOT to generate the PS ON
signal to the LVPS to power-on the machine.
Reading or Setting the Power Save Duration Times
Access the power save feature by performing the following:
• Press the access button.
• Input the password and press Enter.
• Select Go to Tools.
• Select Power Saver Administration.
• Select Set Duration Times.
The default time for standby mode to low power mode is 15 minutes, the minimum value is 1,
the maximum value is 120.
The default time for low power mode to sleep mode is 45 minutes, the minimum value is 0, the
maximum value is 120.
To change either of the timing values, touch the appropriate input area, enter the new value
using the keypad. Touch the Save button to confirm the change.
Procedure
WARNING
Switch off the electricity to the machine, GP 14. Disconnect the power cord from the
customer supply while performing tasks that do not need electricity. Electricity can
cause death or injury. Moving parts can cause injury.
Refer to Sleep Mode to Run Mode. The machine remains in sleep mode after a wake
event.
Y
N
Refer to Run Mode to Sleep Mode. The machine remains in standby mode or low
power mode after both power save duration times have elapsed.
Y
N
The machine switches off when it should enter sleep mode.
Y
N
The system is operating correctly, perform SCP 6 Final Actions.
Perform the following:
• Refer to Reading or Setting the Power Save Duration Times. Set both the
standby mode to low power mode and the low power mode to sleep mode val-
ues to 1 minute.
• Disconnect the Fax telephone lines to prevent a power management event.
• Disconnect the network controller from the network to prevent a power man-
agement event.
Go to Flag 1. Check the voltage at P/J27 pin 8 on the IOT PWB. After 2 minutes
the voltage changes from +3.3V to 0V.
Y
N
Go to Flag 1. Check the wiring and connectors between PJ1 pin 9 and PJ105
pin 7. Refer to the information that follows:
• P/J1 IOT PWB.
A B C