Xerox DocuColor 2240, Service Manual

Page: 731 / 1489

09/03
2-698
DC 3535/2240/1632, WC M24
OF 1-3
Initial issue Status Indicator RAPs
OF 1-3 +24 VDC Enable
Use this RAP to determine why the +24V LVPS is not enabled.
Procedure
The machine is a DC 3535.
Y
N
Refer to Figure 1 . +3.3 VDC is measured between P/J505 -3 (+) on the 24V LVPS and
GND (-).
Y
N
+3.3 VDC is measured between
P/J534 -B4 (+) on the I/F PWB and GND.
Y N
Go to Flag 1 . Repair the open circuit.
Replace the MCU PWB ( PL 13.1 ).
If the problem continues, replace the ESS PWB ( PL 13.1 ).
+5 VDC is measured between P/J505 -4 (+) on the 24V LVPS and GND (-).
Y N
+5 VDC is measured between
P/J511 -3 (+) on the 5V LVPS and GND (-).
Y N
Replace the 5V LVPS ( PL 9.1 ).
Go to Flag 2 . Repair the open circuit between the 24V LVPS and 5V LVPS.
Switch off the power. Less than 5 ohms is measured between P/J505 -2 on the 24V
LVPS and GND.
Y
N
Go to Flag 3 . Repair the open circuit between the 24V LVPS and 5V LVPS.
Replace the 24V LVPS ( PL 9.1 ).
Refer to Figure 2 . +5 VDC is measured between P/J505 -3 on the 24V LVPS and GND (-).
Y N
Go to Flag 4 . Check the wire for an open circuit. If the wire is good, replace the MCU PWB
( PL 13.1 ).
+5 VDC is measured between P/J505 -4 (+) and P/J505 -2 (-).
Y N
Go to Flag 5 and Flag 6 . Check the wires for an open circuit. If the wires are good, replace
the MCU PWB ( PL 13.1 ).
Replace the 24V Low Voltage Power Supply ( PL 9.1 ).
Figure 1 OF1-3 RAP Circuit Diagram - DC 2240/1632 +24V LVPS Enable
Figure 2 OF1-3 RAP Circuit Diagram - DC 3535 +24 LVPS Enable