Xerox WorkCentre 5790 Series, Service Manual

Page: 287 / 1610

May 2013
2-255 Xerox® WorkCentre® 5790 Family
09-060
Status Indicator RAPs
09-060 HVPS Fault RAP
09-060 The HVPS fault sensor has detected a high voltage fault.
The HVPS fault will occur when:
• The (C) charge high voltage supply has a short or open circuit.
• The (G) charge grid high voltage supply has a short or open circuit.
• The (T) transfer high voltage supply has a short circuit.
• The (DT) detack high voltage supply has a short circuit.
• The (DB) developer bias high voltage supply has a short circuit.
• The +24V supply to the HVPS has a short or open circuit.
• The 24 volt supply is momentarily overloaded.
The HVPS fault will deactivate within 100 milliseconds after the removal of the fault.
NOTE: The following defects will NOT cause a 09-060 fault:
• An open circuit or short circuit in the registration chute bias circuit (CB)
• A poor contact of the registration/halo guide bias
• An open circuit in the developer bias circuit
• An open circuit in the transfer corotron circuit
• An open circuit in the detack corotron circuit
Initial Actions
WARNING
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.
• Switch off the machine, then switch on the machine, GP 14 .
• Clean the charge scorotron, ADJ 9.1 .
• Clean the transfer / detack corotron and check the corotron wire, ADJ 9.1 .
• Reseat the high voltage connections on the HVPS, (40-90 ppm) Figure 1 , (35 ppm) Figure
2 .
• Check the registration transport bias contact, PL 8.15 Item 23 , Figure 3 .
• Check the bias connection, Figure 3 .
• Reseat the developer bias connection, Figure 4 .
• If the machine is above 750 metres above sea level, check the transfer / detack assembly
for arcing. If necessary go to
dC131 NVM Read / Write location 09-098 and select the
appropriate altitude.
• Check for any cause of an overload to the 24V supply. For example, very thick multi-feeds
causing the main drive motor to stall.
Procedure
If you were directed from IQ8 Defect RAP, continue below. If the following checks do not
resolve the image quality problem, return to IQ3 Xerographic RAP.
NOTE: The following are the only values that can be measured from the HVPS.
• Charge scorotron grid, -425V +/- 21V.
• The two terminals identified as G are the same output.
• Registration chute bias, -490V +/- 25V.
• The two terminals identified as CB are the same output.
• Developer bias, -370V +20V / -50V.
NOTE: The charge, transfer and detack corotron have 47k Ohms arc suppression resistors
within their harnesses.
Check that the surface mounted fuse F1 on the IOT PWB is good. Refer to OF7 IOT PWB
Diagnostics RAP, for the location of the F1 surface mounted fuse. The surface mounted
fuse is good.
Y
N
Perform the procedures that follow:
• 01G +24V Distribution RAP.
• 01B 0V Distribution RAP.
• 01H Short Circuit and Overload RAP.
Run the xerographic module cleaning routine from the UI tools menu.
Enter
dC330 . Select component code 09-060 HVPS fault and press save. Press start. The
display for code 09-060 is Low.
Y
N
+24V is available at the bottom cap of
fuse F1 on the IOT PWB.
Y N
Perform the
01G +24V Distribution RAP to troubleshoot the fault.
Install a new HVPS, PL 1.10 Item 5 .
Add Component code 09-061 charge scorotron. Press start. Time out after 3 seconds. The
display for code 09-060 is Low.
Y
N
Go to
Flag 1 . Check the charge scorotron harness for an open circuit or short circuit to
ground, GP 7 . The scorotron harness and connectors are good.
Y N
Install a new charge scorotron harness, (35-55 ppm)
PL 4.17 Item 18 , (65-90 ppm)
PL 4.12 Item 20 .
Install a new xerographic module, (35 ppm) PL 9.22 Item 2 , (40-90 ppm) PL 9.20 Item 2 .
If the fault continues, install a new HVPS, PL 1.10 Item 5 .
If the fault continues, there is a problem with the charge corotron harness/connector,
Install a new main drive module (35-55ppm),
PL 4.15 Item 1 , (65-90ppm), PL 4.10 Item 1 .
Add component code 09-062 charge grid. Press start. Time out after 3 seconds. The display
for code 09-060 is Low.
Y
N
Go to the
Flag 1 . Check the charge grid harness for open circuit or short circuit to ground,
GP 7 . The grid harness and connectors are good.
Y N
Install a new charge grid harness, (35-55 ppm)
PL 4.17 Item 19 , (65-90 ppm) PL
4.12 Item 21 .
Install a new xerographic module, (35 ppm) PL 9.22 Item 2 , (40-90 ppm) PL 9.20 Item 2 .
If the fault continues, install a new HVPS, PL 1.10 Item 5 .
A