Xerox WorkCentre 5790 Series Service Manual page 563

14-110 Scan Carriage Home Sensor Entry RAP
14-110. The scanner PWB has not detected the scan carriage in the home position.
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.
Perform the following:
• (W/O TAG 150), go to the 14-110A
• (W/TAG 150), go to the 14-110B Scan Carriage Home Sensor RAP
Xerox® WorkCentre® 5790 Family
WARNING
Scan Carriage Home Sensor RAP (W/O
(W/TAG
14-110A Scan Carriage Home Sensor RAP (W/O TAG 150)
Initial Actions
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to
death or injury. Moving parts can cause injury.
• Make sure that the correct RAP is used. To identify the correct RAP to use, go to the
110 Scan Carriage Home Sensor Entry RAP.
• Check that the scan cables are correctly positioned,
TAG 150).
• Visually check the alignment of the scan motor through the document glass, the rubber
150). element of the motor bracket can fail. If necessary, install a new scan motor bracket,
14.25 Item 18. Refer to
• Check that the harness from PJ152 is not routed under the single board controller PWB. If
the harness was under the PWB, examine the harness sleeving for punctures or other
damage. If necessary, install a new DADH/power distribution PWB harness,
6. Route the new harness to the right, away from the single board controller PWB. If this
has caused a blown fuse F1 on the power distribution PWB, install a new power distribu-
tion PWB, PL 3.24 Item
NOTE: This fault has been caused on a number of machines by bad routing of the DADH/
power distribution PWB harness
Procedure
Go to Flag 3. Check for +24V on
tion PWB. The voltage is good.
Y N
As necessary, perform the steps that follow:
• Go to the 01G
• Go to the 01B
Go to Flag 3. Check for +12V on
The voltage is good.
Y N
As necessary, perform the steps that follow:
• Go to 01F +12V Distribution RAP.
• Go to 01B 0V Distribution RAP, refer to the 12V return.
Check that +24V is available in the scanner by entering the
exposure lamp illuminates.
Y N
Go to Flag 3. Check for +24V on
PWB. Also check for +12V on
ages are good.
Y N
Check the harnesses between the power distribution PWB, the scanner PWB and
the CCD PWB. If necessary, install a new single board controller module/scanner
driver PWB/CCD PWB harness
ness PL 14.25 Item
A B
May 2013
2-531
WARNING
GP 14. Disconnect the power cord. Electricity can cause
Figure 2.
REP 14.11 Scan Motor.
5.
PL 3.24 Item 6.
P/J135 between pins 1 to 3 and 2 to 4 on the power distribu-
+24V Distribution RAP.
0V Distribution RAP, refer to the 24V return.
P/J135 between pins 6 to 8 on the power distribution PWB.
dC330
P/J455 between pins 1 to 2 and 3 to 4 on the scanner
P/J450 between pins 1 and 2 on the CCD PWB. The volt-
PL 14.25 Item 13, CCD PWB/Scanner PWB har-
23.
14-
PL
PL 3.24 Item
output code 14-005. The
Status Indicator RAPs
14-110, 14-110A