Power Supplies On/Off Control; Cpu Reset Function; Power Supply Cooling Mechanism - Minolta CF910 Service Manual

1154SBM2203A

22-3. Power Supplies ON/OFF Control

DC5V
1
Power cord
plugged in
Power Switch
S1 ON
Door open
Malfunction
detected
Misfeed
detected
: Power ON ×: Power OFF
1: This is the power for the laser and is ON only during a copy cycle and predrive.
2: This is the power for options. It is not turned OFF when a malfunction occurs in the
copier, but is turned OFF if a communication failure occurs with the options.
1154SBM2204A

22-4. CPU Reset Function

• This copier is not equipped with a Tech. Rep. Setting Switches board as with the conven-
tional machines and the CPU is reset by the following way.
• The CPU is reset by turning OFF the DC5V2 output from DC Power Supply 1 PU1 for
a given period of time immediately after Power Switch S1 has been turned OFF.
Power cord
plugged in
DC5V2
PU1
ON
S1
OFF
1154SBM2205A

22-5. Power Supply Cooling Mechanism

• Power Supply Cooling Fan Motor M20: Draws air out of DC Power Supply 1 PU1 to
<Control>
M20 PWB-L PJ9L-7
ON
OFF
M20
DC5V DC5V DC±12V
2 3
×
Control Signal
Power Switch ON
M-133
DC Power Supply 1 PU1
DC±12V DC24V
1 2
× ×
1
×
×
×
prevent the temperature of PU1 from rising.
ON OFF
H
DC24V DC24V
1 3 4
× ×
×
×
×
1154T46MCB
Wiring Diagram
L 31-D
Power OFF
1154T39MCA
DC24V
5
×
2