Lexmark C520 Series, Service Manual

Page: 122 / 259

2-64
Service Manual
5022- xxx
Dead printer service check
A dead printer is a condition where the display is blank, the LED on the operator panel is off, no fans turn, no
motors turn, and the fuser lamp does not come on.
If a 500-sheet option assembly is installed, remove the option and check the base printer for correct operation. If
the base printer operates correctly, replace the 500-sheet option assembly.
Warning: Observe all necessary ESD precautions when removing and handling the system card or any
installed option cards or assemblies. See
“Handling ESD-sensitive parts” on page 4-1 .
CAUTION: When you see this symbol, there is a danger from hazardous voltage in the area of the
printer where you are working. Unplug the printer before you begin, or use caution if the printer must
receive power in order to perform the task.
Remove any input and output paper handling options from the printer.
FRU Action
1 Line voltage Check the AC line voltage. If the line voltage is incorrect, inform the
customer.
2 AC line cord Unplug the line cord from the wall outlet and check the line cord for
damage, such as a damaged plug or a cut or damaged cord. If
damaged, replace the cord. If cord is not damaged, check the
continuity of the line cord and replace if necessary. If the cord is okay,
go to step 3.
3 +5VDC test point on the
system card Check for approxi5 V dc between JLVPS1 pin 1 and ground.
If the voltage is correct, replace the system card. Go to “System
card removal” on page 4-47 . If the voltage is incorrect, go to step 4.
4 System card Check to make sure the JLVPS1 cable is correctly installed at
JLVPS1 on the system card. If not, reseat and recheck the voltage
between JLVPS1 pin 1 (red wire) and ground
If test point does not m5 V dc, go to step 5.
5 LVPS Turn the printer off. Unplug the AC line cord from the LVPS and
disconnect JLVPS1 cable from the system card. Reconnect the AC
line cord, turn the printer back on, and measure the voltage between
JLVPS1 cable pin 1 (red wire) and the JLVPS1 pin 14 (black wire).
The voltage should measure approxi5 V dc.
If the voltage is correct, go to step 6. If the voltage is incorrect,
replace the LVPS assembly. Go to
“Low volt power supply (LVPS)
removal” on page 4-38 .
6 Feature or option installed
on the system card Warning: Observe all the ESD precautions and turn the printer off
before any feature or option cards are removed or replaced.
Remove one option/feature at a time to help isolate the failing part.
Replace the faulty part.
7 Loads connected to the
system card Turn the printer off and disconnect a cable (with exception of
JLVPS1) connected to the system card. Turn the printer back on.
Repeat this for all cables (with exception of JLVPS1) until the problem
is located.
Warning : When removing any card installed on the system card
observe all ESD precautions when handling these options.