Xerox WorkCentre 7132 Service Documentation page 915

OF 6 Dark / Blank Display RAP
Touch Screen is dark with minimal legibility, or no text or graphics are visible, or text or graph-
ics are distorted, or indicator LED's are not lit.
Initial Actions
Ensure all external cables and power cords are connected.
Procedure
NOTE: If a Status Code is displayed, go to the appropriate 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 +5VDC failure. Go to BSD 1.1 and check 5VDC standby voltages.
+24VDC is measured between P/J1 pin 40 and ground on Control Panel (BSD 2.3).
Y N
+24VDC is measured between P/J388 pin 40 and pins 25, 26 on the ESS (BSD
2.3).
Y N
+24VDC is measured between P/J387 pin 5 and ground on the ESS (BSD
1.1).
Y N
+24VDC is measured between P/J510 pin 1 and ground on Power
Unit (BSD 1.1).
Y N
AC voltage is measured between J11 pin 1 and J12 pin 1 on the
Power unit (BSD 1.1).
Y N
AC voltage is measured at wall outlet.
Y N
Contact key operator to resolve power problem.
GFI Breaker is tripped.
Y N
Replace GFI Breaker (PL 11.1).
Reset GFI Breaker.
AC voltage is measured at J1 pin 3 and ground (BSD 1.1).
Y N
Replace Main Power Switch (PL 11.1).
Replace Power Unit (PL 11.1).
Go to BSD 1.1 and check circuit between P/J510 on Power Unit and P/
J387 on ESS PWB.
A B C D
Status-indicator-raps
OF 6
A B C D
Check Fuse 2 on the ESS PWB. If OK then replace ESS PWB (PL 11.2).
Go to BSD 2.3 and check circuit between P/J1 on Control Panel and P/J388 on ESS
PWB.
Replace Control Panel (PL 13.1).
Check the Touch screen for one of the following:
• Distortion
• Misplaced characters
• Lines or spots
• Non-responsive icons
• Some illumination in the Touch Screen
The Touch Screen exhibits one of the above characteristics.
Y N
Characters are visible when shining flashlight onto display.
Y N
Replace Display PWB (PL 13.2). If problem persists replace Control Panel (PL 13.1).
Replace UI PWB (PL 13.2).
Replace Display PWB (PL 13.2). If problem persists replace Control Panel (PL 13.1).
January 2007
2-882
Revision
WorkCentre 7132