The machine's DC power supply PCB and accessories power supply PCB are equipped with an over-current protective mechanism and an over-voltage protective

mechanism that will automatically shut off the output voltage to protect its electrical circuitry in the event of a short circuit or other fault in any of its loads causing

over-current.

In the event of a fault in the 3 VB power (all-night power supply), all supplies of power will be shut off. A fault in other power supplies will shut off power to all

loads except for 3 VB.

If a malfunction occurs in 3VB (all-night power supply), it is necessary to turn off the main power switch of the printer unit, remove the cause triggering the pro-

tection circuit, and replace the all-night power supply PCB. (The fuse of the all-night power supply PCB is likely to have blown.)

For other cases than above, the protection circuit can be reset by turning off the main power switch of the printer unit, removing the cause triggering the protection

circuit, leaving the printer unit alone for more than 3 min, and tuning on the power again.

10.4.4 Backup Battery

10.4.4.1 Backup Battery

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /

The controller PCB and the DC controller PCB are equipped with a lithium battery (1 pc. each) to serve as a source of power, backing up various data in the even

of power failure.

Controller PCB

DC controller PCB

Life

Replacement

Be sure to exercise care whenever you have to replace the battery. In certain cases, it may explode.

Do not use a battery which is not of a type specifically indicated (same name, or equivalent).

Dispose of any used battery according to the instructions of its manufacturer.

10.4.5 Energy-Saving Function

10.4.5.1 Overview

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /

1. Standby Mode

When the machine is in standby mode, all its power supplies are provided with power, and the machine is ready for immediate operation.

2. Sleep Mode

2-1. Sleep 1

When the machine is in sleep mode 1, its control panel remains off, and the polygon motor (M1) will not rotate even when any of the control panel keys is pressed.

In this mode, the machine is provided with power as in standby mode.

2-2. Sleep 3

When the machine is in sleep mode 3, only 3 VB is available. The machine will move to standby mode from sleep 3 in response to any of the following:

- print job

- press on the control panel power switch

- incoming fax

The following shows the sections of the machine that are provided with power in sleep 3:

24VA

+8%,-6% (from 0A to 0.1A, from 6.5 to 12A)

Output

All-night/non-all night

Rated output