Rated Output Of The All-Night Power Supply Pcb; Protective Mechanisms; Backup Battery; Protection Function - Canon iR4570 Series Service Manual

Output
Power supply tolerance

10.4.2.4 Rated Output of the All-Night Power Supply PCB

iR2270 / iR2870 / iR3570 / iR4570
The following are the ratings and the power supply tolerances of the all-night power supply PCB:
Output
All-night/non-all night
Rated output
Power supply tolerance

10.4.3 Protection Function

10.4.3.1 Protective Mechanisms

iR2270 / iR2870 / iR3570 / iR4570
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 protection 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
24VA
+/-5% (from 0.1A to 6.5A)
+8%,-6% (from 0A to 0.1A, from 6.5 to 12A)
T-10-10
3VB
all night
3.4V
+/-3%
Chapter 10
0006-5646
0006-5396
0008-0861
10-13