09/03
2-701
DC 3535/2240/1632, WC M24
OF 2-1
Status Indicator RAPs
Initial issue
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.
YN
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.
YN
There is a +5 VDC failure. Go to the OF 1-2 RAP.
Switch off the power. Remove the Platen Glass (REP 6.2) and the IPS Cover (PL 18.3).
Switch on the power. +24 VDC is measured between P/J720-1 and -5 on the IIT/IPS
PWB.
YN
Remove the IIT Top Cover (REP 6.3). +24 VDC is measured between J702-1 and
-5 on the IIT LVPS.
YN
Approximately +3.7 VDC is measured between J705-3 on the IIT LVPS and
GND.
YN
Go to Flag 7. Check the wire for an open circuit. If the wire is good,
replace the ESS PWB (PL 13.1).
+5 VDC is measured between J705-4 and GND.
YN
Go to Flag 1. Check the wire for an open circuit. If the wire is good,
replace the ESS PWB (PL 13.1).
AC Line Voltage is measured between P700/J2 on the IIT LVPS.
YN
Ensure that the AC Harness (PL 18.4) between the IOT and the IIT is con-
nected properly. If ok, go to Flag 2. Check the wires for an open circuit.
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.
YN
Replace the IIT/IPS PWB (PL 18.3).
+3.3 VDC is measured between J726-A6 and A8.
YN
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.
YN
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 Flag 6. Check the wires for an open or short circuit. If the wires
are good, replace the UI Assembly (PL 18.2).
Replace the UI PWB (PL 18.2). If the problem continues, replace the VR PWB (PL 18.2).
A
A
To Next Page
Loading...
Need help?
General
