Xerox WorkCentre 5790 Series, Service Manual

Page: 690 / 1610

May 2013
2-658 Xerox® WorkCentre® 5790 Family
OF10
Status Indicator RAPs
Customer Power Supply Checkout
WARNING
Take care when measuring AC mains (line) voltage. Electricity causes death or injury.
CAUTION
If you suspect that the customer power supply is incorrect, do not try to correct the customer
power supply. Do not reconnect the printer. Inform the customer and your manager.
• Measure the customer power supply voltage at the power outlet and check that the cus-
tomer power supply is within specification; Refer to
GP 22 Electrical Power Require-
ments.
• Check that the customer power supply does not drop below the specification when the
copier is making copies; use a digital meter and select “Peak Hold”. Refer to
GP 22 Elec-
trical Power Requirements.
External Electrical Equipment Checkout
WARNING
Take care when measuring AC mains (line) voltage. Electricity causes death or injury.
CAUTION
If you suspect that the customer power supply is incorrect, do not try to correct the customer
power supply. Do not reconnect the machine. Inform the customer and your manager.
Perform the following:
• Ask the customer if there is any electrical equipment, which uses a large amount of cur-
rent, that is connected to the same supply circuit as the machine.
• With the customer's assistance, check if the failure occurs when electrical equipment near
to the machine is switched ON or OFF.
• If possible, connect the machine to a different supply circuit from the equipment that is
causing the problem.
Common Causes Checkout
Make the following checks of common causes of intermittent failures:
• Check for intermittent connections in the fuser connector assembly, (35-55 ppm) PL 4.15
Item 9 , (65-90 ppm) PL 4.10 Item 9 .
• Check for intermittent connections in the wiring to the exposure lamp, (W/ TAG 150 ) PL
14.15 Item 9 or (W/O TAG 150 ) PL 14.25 Item 9 .
• Check that the interlock switch S01-300; PL 1.10 Item 7 , is fully actuated by the front
interlock. If the fault is eliminated when an interlock cheater is installed, check that the
interlock actuator bracket is not damaged. Install new parts as necessary.
Connectors and Wiring Checkout
Refer to REP 1.2 for details of wiring harness repair.
Check the following:
• Visible signs of damage to the wiring and the ribbon cables.
• Check for pinched wires near moving parts.
• The DADH module harness for broken wiring and ensure that the ground terminals are
secure.
• For the continuity of harnesses by checking for wire breaks inside insulation. Gently pull
the relevant connector and wire while measuring continuity.
• Check that all the PWB and in-line connections are good; refer to PJ Locations .
• Check the continuity of the ground connections to the copy cartridge, fuser module and
input and output modules. Refer to the
01A Ground Distribution RAP.
• Check that all the input and output module static eliminators are connected correctly and
in good condition; refer to the relevant input or output module RAP.
Power Supply Checkout
Check the power cord for continuity. Refer to the 01C AC Power RAP.
EPROMs Checkout
Check that all EPROMs are installed correctly. Refer to REP 3.4 Single Board Controller and
Power Distribution PWBs.
Electric Motors Checkout
Refer to GP 10 How to Check a Motor and perform the following:
• Disconnect each motor in turn to locate the motor that is causing the fault. When the
faulty motor has been located, install a new motor.
• If the fault still exists, locate the PWB that drives the motor and install a new PWB.
Solenoids and Clutches Checkout
Refer to GP 12 How to Check a Solenoid or Clutch and perform the following:
• Check that the components are installed correctly.
• Check that there is no mechanical binding, slipping or interference.
• Enter the relevant output codes and check that the energizing of the components is reli-
able. Check if the fault is caused when the components de-energize.
• If it is suspected that a clutch or solenoid is faulty, install a new component as necessary.
• If the fault still exists, locate the PWB that drives the component and install a new PWB.
Switches and Sensors Checkout
Refer to GP 11 How to Check a Sensor and GP 13 How to Check a Switch and perform the fol-
lowing:
• Check that the components are clean and installed correctly. Ensure that the wiring to the
components is connected correctly.
• Enter the relevant input codes and check that the sensing of the components is reliable.
Check if the fault is caused when the components are actuated.
• If it is suspected that a switch or sensor is faulty, install a new component as necessary.
• If the fault still exists, locate the PWB that controls the component and install a new PWB.
High Voltage Arcing Checkout
Use this Checkout when there are intermittent 03-XXX failures and the suspect cause is high
voltage arcing.
Refer to the 09-060 HVPS Fault RAP and complete all of the actions to check the HVPS.
Registration Guide Checkout
• Check that the upper registration and lower registration guides are not shorted to ground.
If a short to ground is found, inspect the guides and harnesses between the registration
guide and bias lead at CB terminal on the HVPS.
• Check that there is continuity between the upper and lower registration guide. Check that
the registration bias terminal screw is tight.