Xerox DocuColor 2240 Service Manual page 734

OF 2-1 Dark / Blank Display
UI Display is dark with minimal legibility, or no text or graphics are visible.
Initial Actions
Ensure all external cables and power cords are connected.
Procedure
NOTE: If a Status Code is displayed, go to status code RAP.
There is some luminance in the UI display.
Y N
Switch off the power. Listen to the cooling fans on the right side and at the rear of the
machine and switch on the power. Cooling fans are audible either momentarily or
continuously.
Y N
There is a +5 VDC failure. Go to the
Switch off the power. Remove the Platen Glass
Switch on the power. +24 VDC is measured between P/J720-1 and -5 on the IIT/IPS
PWB.
Y N
Remove the IIT Top Cover (REP
-5 on the IIT LVPS.
Y N
Approximately +3.7 VDC is measured between J705-3 on the IIT LVPS and
GND.
Y N
Go to Flag 7. Check the wire for an open circuit. If the wire is good,
replace the ESS PWB
+5 VDC is measured between J705-4 and GND.
Y N
Go to Flag 1. Check the wire for an open circuit. If the wire is good,
replace the ESS PWB
AC Line Voltage is measured between P700/J2 on the IIT LVPS.
Y N
Ensure that the AC Harness
nected properly. If ok, go to
Go to Flag 3. Check the wires for a short circuit. If the wires are OK, replace the
IIT LVPS (PL 18.4).
Go to Flag 3. Check the wires for an open circuit.
+24 VDC is measured between J726-A2 and -A4 on the IIT/IPS PWB.
Y N
Replace the IIT/IPS PWB (PL 18.3).
+3.3 VDC is measured between J726-A6 and A8.
A
Initial issue
DC 3535/2240/1632, WC M24
OF 1-2 RAP.
(REP 6.2) and the IPS Cover (PL
6.3). +24 VDC is measured between J702-1 and
(PL 13.1).
(PL 13.1).
(PL 18.4) between the IOT and the IIT is con-
Flag 2. Check the wires for an open circuit.
A
Y N
Go to Flag 5. Check the wires for a short circuit. If the wires are OK, replace the IIT/
IPS PWB (PL 18.3).
+5 VDC is measured between J726-A10 and -A9.
Y N
Go to Flag 6. Check the wires for a short circuit. If the wires are OK, replace the IIT/
IPS PWB (PL 18.3).
Go to Flag 4, Flag 5, and
are good, replace the UI Assembly
Replace the UI PWB (PL 18.2). If the problem continues, replace the VR PWB
18.3).
09/03
2-701
Flag 6. Check the wires for an open or short circuit. If the wires
(PL 18.2).
Status Indicator RAPs
(PL 18.2).
OF 2-1