Power Distribution Control At Machine Power Up - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004

20.2 Power distribution control at machine power up

20.2.1 Parts operated when the Power Switch is turned ON
• When the Power Switch is turned ON, the Control Board detects it and sends a control
signal to the DC Power Supply.
• The DC Power Supply then supplies 3.3V DC, 5V DC, 15V DC, and 24V DC to all PWBs
and options. It also turns ON the relays in the PWBs, supplying AC power to each of the
heater lamps.
SW1
24VDC
24VDC
PU1
5VDC
24VDC
15VDC
PWB-C
5VDC
24VDC
5VDC
24VDC
5VDC
24VDC
5VDC
3.3VDC
RY
2-93
DF-601
PWB-IC
5VDC
24VDC
5VDC
PWB-MC
5VDC
5VDC
5VDC
PWB-MFP
PWB-LED
H1,H2,H3
Other control
Control Panel
PWB-A
FS-601/FS-501
(OPTION)
AD-501
(OPTION)
PC-201
PC-101
(OPTION)
PC-401
(OPTION)
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