Canon ImageRunner iR8500 Series, Service Manual, Page: 549 / 1122

Chapter 11
11-19
T-11-20
11.4.4.6 Standby Mode (normal operation)
0006-9835
iR105
In standby mode, the machine is in normal operation or is ready to start normal operation at any moment; in other words, most of power supplied are in
operation.
Not only the main controller PCB, but also the reader unit, printer unit, and control panel are all ready for communication and control.
11.4.4.7 Power Save Mode
0006-9836
iR105
Most of power supplies are in operation (same as in standby mode).
According to the selected rate of saving, the control temperature of the fixing assembly for standby is lowered to reduce power consumption (140 deg C
for 200 V model; 198 deg C for 208 V/230 V model, for which no specifications are provided).
11.4.4.8 Low Power Mode
0006-9837
iR105
In low power mode, the fixing assembly temperature is kept low (140 deg C for 200 V model, 198 deg C for 208 V/230 V model), and the power consumed
by the reader unit and the printer unit is lowered to reduce the total power consumption for the machine.
Shift from Standby Mode (standby -> low power)
A shift from standby mode to low power mode is made for the following:
- Standby mode has continued for a specific period of time, i.e., a specific period of time as may be selected in user mode.
Shift to Standby Mode (low power -> standby)
A shift from low power mode to standby mode is made on the following condition:
- The control panel power switch (soft switch) is turned on.
- PDL data has been received from the network (parallel port); in terms of electrical mechanisms, the control panel is OFF as in standby mode.
11.4.4.9 Sleep Mode
0006-9846
iR105
In sleep mode, only the +3.3 V all-night (3.3 VB) power supply is ON. In this mode, the CPU on the main controller PCB is also at rest (in wait for an
interrupt and not running the program) to reduce power consumption.
This mode is used only when the machine is configured as a printer equipped with a network print option and a PDL print option.
Shift from Standby Mode (standby -> sleep)
A shift from standby mode to sleep mode is made on the following condition:
- The control panel power switch (soft switch) is off.
- Standby mode has lasted for a specific period of time, i.e., a specific period of time as may be selected in user mode.
Shift from Low-Power Mode (low power -> sleep)
A shift from low power mode to sleep mode is made on the following condition:
- The control panel power switch (soft switch) is off.
- Low power mode has lasted for a specific period of time, i.e., a specific period of time as selected in user mode.
Return to Standby Mode (sleep -> standby)
A shift from sleep mode to standby mode is made on the following condition:
- The control panel power switch (soft switch) is on.
- PDL data has been received from the network (parallel port); in electrical terms, the control panel is off as in standby mode.
11.4.4.10 OFF Mode(iR105)
0006-9855
iR105
In OFF mode, the +3.3 V all-night power supply of the CPU itself is off, leaving a minimum logic circuitry of the main controller PCB on.
This mode is used when the machine is configured as a copier without a network print option or a PDL print option.
Shift from Standby Mode (standby -> OFF mode)
A shift from standby to OFF mode is made on the following condition:
- The control panel power mode (soft switch) is off.
- Standby mode has lasted for a specific period of time, i.e., a specific period of time as selected in user mode.
Mode +3.3 V all night +3.3 V non-all
night +5V +24V
Standby yes yes yes yes
Power save yes yes yes yes
Low power yes yes yes yes
Sleep yes no no no
Off yes no no no
Power off no no no no