Mita PointSource Ai 5555 - Other Kinds of Control; Parts that Operate When the Main Switch Is Turned; Parts through Which Current Flows When the Main Switch Is Turned off; Switch Is Turned

2 - T - 1
OTHER KINDS OF CONTROL
OTHER KINDS OF CONTROL
[1] Parts Through Which Current Flows
When the Main Switch is Turned OFF
1. Operation
Current flows through the following parts if the power cord
is plugged into the power outlet, regardless of whether or
not SW1 (main) is ON or OFF.
a. CBR (breaker)
If an internal part short circuits, causing a current of more
than 8 A to flow, the breaker goes OFF, cutting off the power
to the machine.
b. NF (noise filter)
The noise filter is used to reduce noise entering the ma-
chine via the power line, and also external leakage of noise
generated in the machine.
c. Internal heaters
For dehumidifying the inside of the machine (These heat-
ers are ON only when the machine is switched OFF.)
[2] Parts That Operate When the Main
Switch is Turned ON
CBR
CBR
NF
HTR1 HTR2 HTR3
SW1
RL2
DCPS
1. Operation
a. Power supply
When SW1 (main) is turned ON, the AC supply voltage is
applied to the DCPS (DC power supply unit). As a result,
the DCPS supplies DC voltage to the CB (control board),
OPMDB (optics drive motor driver board), ADB (AD con-
verter board), IPB (image processing board), Finisher and
RADF. The CB starts control inside the machine, and also
starts the following operations.
* RL1 (main relay) ON
* Initial operation of OB (operation board)
* Fixing unit warmup
* Low speed rotation of each fan
397-1
3975
AC (H)
AC (C)
24VDC
RL DRIVE
24VDC
12VDC
8VDC
5VDC
SGND
PGND
24VDC
PGND
24VDC
PGND
40VDC
24VDC
PGND
12VDC
5VDC
-5VDC
SGND
5VDC
SGND
5VDC
SGND
60-B1
60-B9
CB
AC (H)
AC (H)
RL1
Finisher
CVR
RADF
DCPS
ADB
IPB
OB1
OPMDB
MS1
MS2
HTR3
HTR2
HTR1