Xerox WorkCentre 5790 Series Service Manual page 570

14-310 CCD PWB Not Detected RAP (W/O TAG 150)
14-310 The scanner PWB detects an abnormal power supply voltage or a CCD PWB failure.
NOTE: This fault code only applies to machines W/O
Procedure
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to GP 14. Disconnect the power cord. Electricity can cause
death or injury. Moving parts can cause injury.
Go to Flag 1. Check the following voltages at
• +24V between pins 1 and 3.
• +24V between pins 2 and 4.
The voltages are good.
Y N
Disconnect P/J135. Check the voltages again at
The voltages are good.
Y N
Go to the following RAPs:
• 01B 0V Distribution RAP, refer to the 24V return.
• 01G +24V Distribution RAP.
Check for a short circuit in the harness between
REP 1.2, or install a new harness,
scanner PWB, PL 14.25 Item 4.
Check that +24V is available in the scanner by entering the
exposure lamp illuminates.
Y N
Remove the CVT glass and document glass,
Remove the PWB cover, 3 screws,
Re-install the scanner top cover and GUI, but do not install the screws. Re-connect the
power cord and switch on the machine,
Go to Flag 1. Check the following voltages at
• +24V between pins 1 and 3.
• +24V between pins 2 and 4.
The voltages are good.
Y N
Check for a open circuit on the harness between
harness, REP 1.2, or install a new harness,
Optics Cleaning Procedure.
Go to the 14D Exposure Lamp Failure RAP.
Go to Flag 2. Check the following voltages at
• +12V between pins 8 and 6.
• +3.3V between pins 7 and 5.
The voltages are good.
Status Indicator RAPs
14-310
TAG 150.
WARNING
P/J135 on the power distribution PWB:
P/J135 on the power distribution PWB.
P/J135 and P/J455. Repair the harness,
PL 14.25 Item 13. If the harness is good, install a new
dC330 output code 14-005. The
REP 14.6.
PL 14.25 Item 1.
GP 14.
P/J455 on the scanner PWB,
P/J135 and P/J455. Repair the
PL 14.25 Item 13. Perform
P/J135 on the power distribution PWB:
Y N
Disconnect P/J135. Check the voltages again at the connector on the power distribution
PWB. The voltages are good.
Y N
Go to the relevant RAP:
• 01B 0V Distribution RAP, refer to the 12V return and 3.3V return.
• 01F +12V Distribution RAP.
• 01D +3.3V Distribution RAP.
Check for a short circuit on the harness between
ness, REP 1.2, or install a new harness,
Cleaning Procedure.
Go to Flag 2. Check the following voltages at
• +12V between pins 1 and 2.
• +3.3V between pins 3 and 4.
The voltages are good.
Y N
Check for an open circuit in the harness between
ness, REP 1.2, or install a new harness,
Cleaning Procedure.
Install new components in the following order:
• CCD harness, PL 14.25 Item
• Scanner PWB, PL 14.25 Item
• Scanner, PL 14.20 Item
Figure 1:
ADJ 14.1
May 2013
2-538
P/J135 and P/J450. Repair the har-
PL 14.25 Item 13. Perform
P/J450 on the CCD PWB,
P/J135 and P/J450. Repair the har-
PL 14.25 Item 13. Perform
5.
4.
1.
Xerox® WorkCentre® 5790 Family
ADJ 14.1 Optics
Figure 1:
ADJ 14.1 Optics