Power Supply Route In The Reader Unit; Timing Of Supply To The Reader Unit - Canon iR3570 Service Manual

Chapter 10

10.4.1.3 Power Supply Route in the Reader Unit

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
The printer unit controller PCB generates the following DC voltages using the 13 VDC supplied by the printer unit:
- 24 VDC (for motor drive)
- 13 VDC (for LED array)
- 5 VDC (for sensor drive)
- 3.3 VDC (for IC drive/for CCD drive)
24 VDC power is used to drive the motors, while 13 VDC power is used to turn on the LED array for illumination of originals.
To printer unit
(scanner PCB)
To DF
100 VAC
From printer unit
24 VDC, 13 VDC
From printer unit
To DF
0 4
J 5
DC24V
AC100V
Printer unit
controller PCB
Generates 5 VDC from 13 VDC
Generates 3.3 VDC from 13 VDC
F-10-7

10.4.1.4 Timing of Supply to the Reader Unit

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
The reader unit is supplied with 24 VDC/1.3 VDC by the printer unit at such times as described below.
10-6
Heater switch
SW5
Leakage breaker
ELCB2
Heater
switch PCB
Main switch
SW1
Fixing main heater(H1)
AC driver PCB
Fixing sub heater(H2)
Thermal switch(TP1)
24VA
To Finisher-S1
Accessories
power
supply PCB
13VA2
To Finisher-S1
24VU1: non-all night 13VA1: non-all night
24VU2: non-all night 13VA2: non-all night
13VB: non-all night
24VA: non-all night
DC24V
DC13V
DC13V/3.3V
AC100V
Reader heater(H5)
DADF
Reader heater(H6) -N1
power supply PCB
Cassette heater(H4)
DC controller PCB
Printer
Deck heater(H7)
unit
Pickup
Cassette pedestal(H1C)
heater
mounting
kit
Printer power supply block
Printer
24VU1
power
Controller power supply PCB
supply PCB 24VU2
13VA1
13VA2
13VB
All-night
3VB
power
3VB
supply PCB
Super G3 Fax
13VA2
Board-Q1
5VA: non-all night
3VA: non-all night
3VB: all night
F-10-6
HVT
High-voltage
Controller
PCB
0006-5393
0006-5394