Xerox WorkCentre 5790 Series Service Manual page 576

14-703B to 14-706B, 712B, 714B, 718B Failure To Calibrate
RAP (W/TAG 150)
Initial Actions
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.
Take care, a hazardous voltage is present at the output of the exposure lamp inverter.
Electricity can cause death or injury.
• Make sure that the correct RAP is used. To identify the correct RAP to use, go to the
703 to 14-706, 712, 714, 716, 718
• Check that the exposure lamp illuminates when the machine is performing the set up pro-
cedure. If necessary, enter the dC330
nate, go to the W/O TAG 157 Exposure Lamp Check
Check.
Procedure
Figure 1 shows the component location. Switch off the machine, then switch on the machine,
GP 14. The fault is still present.
Y N
Perform SCP 6 Final Actions.
Perform the following:
• Remove the DADH, REP 5.19.
• Remove the scanner top cover, REP
• Reinstall the DADH, REP 5.19.
Go to Flag 1. Check the voltages at P/J135
refer to:
• 01D +3.3V Distribution RAP.
• 01E +5V Distribution RAP.
• 01F +12V Distribution RAP.
• 01G +24V Distribution RAP.
• 01B 0V Distribution RAP.
Check that the CCD PWB/Scanner PWB ribbon cable 1,
Scanner PWB ribbon cable 2, PL 14.15 Item 23
to Flag 1. Check the wiring between P/J135
SBC PWB module, and P/J920 on the scanner PWB. Repair as necessary,
a new SBC PWB/DADH comms/scanner power harness,
Inspect the calibration strips on the front underside of the CVT glass and document glass. The
calibration strips are undamaged.
Y N
Install a new CVT glass, PL 14.20 Item 4
Clean the white CVT strips, under the front edges of the document glass and the CVT glass,
using a cleaning cloth dampened with film remover,
Status Indicator RAPs
14-703B to 14-706B, 712B, 714B, 718B
WARNING
WARNING
Failure to Calibrate Entry RAP.
output code, 14-005. If the lamp does not illumi-
or the W/TAG 157 Exposure Lamp
14.14.
on the power distribution PWB. As necessary,
PL 14.15 Item 15 and CCD PWB/
are undamaged and correctly connected. Go
and P/J136 on the power distribution PWB in the
REP 1.2
PL 14.15 Item 5.
and/or a new document glass, PL 14.20 Item
PL 26.10 Item 4. Re-assemble the parts.
If the fault persists, install new components as necessary:
• Scan carriage ribbon cable,
• Scanner PWB, PL 14.15 Item
• Scanner, PL 14.20 Item
W/O TAG 157 Exposure Lamp Check
Procedure
When measuring voltages of the scanner PWB, take special care not to short any two pins
together.
Remove the document size sensor cover
pins 5 and 3, also between pins 6 and 1,
14-
Y N
Go to Flag 3, disconnect
P/J926 between pins 5 and 3, also between pins 6 and 1,
Y N
Go to Flag 2, disconnect
between pins 5 and 3, also between pins 6 and 1.
Y N
Install a new Scanner PWB,
Check for a short circuit on the ribbon harness. Repair the harness or install a new
scan carriage ribbon harness,
Install a new exposure lamp inverter PWB,
+24V is available at P/J1
Y N
Install a new scan carriage ribbon harness,
Measure the lamp enable signal at
enter the dC330 output code 14-005. The signal voltage changes from +24V to 0V when
the code is active.
Y N
Install a new scanner PWB
Measure the lamp enable signal at
nal voltage changes from +24V to 0V when the code is active.
Y N
Install a new scan carriage ribbon harness,
Switch off the machine, GP
or install
and the exposure lamp. The wiring and connectors are good.
Y N
Install a new exposure lamp,
Install a new exposure lamp inverter PWB,
5.
May 2013
2-544
PL 14.15 Item 10.
4.
1.
CAUTION
REP 14.20. +24V is available at
Flag 2.
P/J1 at the exposure lamp inverter PWB. +24V is available at
Flag
P/J926 at the scanner PWB +24V is available at
PL 14.15 Item 4.
PL 14.15 Item 10.
PL 14.15 Item 12.
between pins 5 and 3, also between pins 6 and 1,
PL 14.15 Item 10.
P/J926 pin 4 on the scanner PWB
W/TAG 150, PL 14.15 Item 4.
P/J1 pin 4. enter the dC330 output code 14-005. The sig-
PL 14.15 Item 10.
14. Go to Flag 4, check the wiring and connectors between
PL 14.15 Item 9.
PL 14.15 Item 12.
Xerox® WorkCentre® 5790 Family
P/J926 between
2.
P/J926
Flag 3.
(W/TAG 150), Flag 3.
P/J2