Xerox WorkCentre 5790 Series Service Manual page 383

11D-110 2K LCSS Power Distribution RAP
The 2K LCSS has an integral power supply providing +24V and +5V supplies to the 2K LCSS
PWB. The AC power for the 2K LCSS power supply comes from the LVPS and base module of
the machine.
Procedure
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.
WARNING
Take care when measuring AC mains (line) voltage. Electricity can cause death or injury.
Do not connect the finisher power cord directly to the AC wall outlet. The finisher cannot oper-
ate without the machine. The machine controls the distribution of electricity to the finisher for
correct power on and power off sequencing.
Close or cheat all the 2K LCSS interlocks.
Y N
+24V is available at Fuse (F1) on the 2K LCSS PWB.
Y N
Go to Flag 2. Check for +24V between the following pins on P/J300:
• Pin 1 and pin 2
• Pin 1 and pin 3
• Pin 1 and pin 6
• Pin 1 and pin 7
• Pin 5 and pin 2
• Pin 5 and pin 3
• Pin 5 and pin 6
• Pin 5 and pin 7
+24V is available between all the checked pins.
Y N
Disconnect P/J300, check for +24V between the following pins on the end of
the harness:
• Pin 1 and pin 2
• Pin 1 and pin 3
• Pin 1 and pin 6
• Pin 1 and pin 7
• Pin 5 and pin 2
• Pin 5 and pin 3
• Pin 5 and pin 6
• Pin 5 and pin 7
+24V is available between all the checked pins on the end of the harness.
A B C
Xerox® WorkCentre® 5790 Family
CAUTION
LED 2 on the 2K LCSS PWB is illuminated.
A B C
Y N
Figure 1. Loosen the 4 screws and lift the power supply module away from
the 2K LCSS frame. Go to
pins 1 and 3.
Y N
Go to the
Check the wiring between CN2 and P/J300. The wiring is good.
Y N
Repair the wiring.
Install a new power supply module,
Check for a short circuit or an overload in the wiring or components connected
to the +24V on the 2K LCSS PWB. Refer to
+24 V is available at PJ315 pin 5 on the 2K LCSS PWB.
Y N
Go to the 11-300-110, 11-302-110, 11-303-110
Do not install a fuse of a different type or rating. Installing the wrong type or
rating of fuse can cause overheating and a risk of fire.
Perform the following:
• Switch off the machine,
• Go to Flag 3. Disconnect all the +24V harnesses to components.
• Check each harness for short circuits and overheating,
• Repair or install new components as necessary.
• Install a new fuse F1 on the 2K LCSS PWB, switch on the machine,
• Monitor the voltage at the left end of the fuse and re-connect the circuits one at
a time. Energize the re-connected components using
• If the voltage drops below +22V, switch off the machine,
component and harness for overheating or short circuits. Repair or install new
components as necessary.
Perform the 11G-110 2K LCSS PWB Damage RAP, if necessary install a new 2K LCSS
PWB, PL 11.26 Item 1.
Go to Flag 2. +5V is available at
Y N
Disconnect P/J300. +5V is available at
pins 7 and 8 on the end of the harness.
Y N
Loosen the 4 screws and lift the power supply module away from the 2K LCSS
frame. Go to Flag 1. ACL is available at CN1 between pins 1 and 3.
Y N
Go to the 01C AC Power RAP and check the AC output voltages.
Check the wiring between CN2 and P/J300. The wiring is good.
D E
May 2013
2-351
Flag 1. ACL is available at CN1 between
01C AC Power RAP and check the AC output voltages.
PL 11.26 Item 2.
GP 7.
Interlocks RAP.
WARNING
GP 14.
GP 7.
dC330
GP
P/J300 between pins 4 and 6, also between pins 7 and 8.
P/J300 between pins 4 and 6, also between
Status Indicator RAPs
GP 14.
control codes.
14. Re-check the
11D-110