Cover Closed Switch/Cable Service Check-Printer; Dead Machine Service Check - Lexmark X642e Service Manual

Cover closed switch/cable service check—printer
FRU
1 Toner cartridge
2 Cover closed switch/cable
assembly

Dead machine service check

A dead machine is a condition where the LCD touchscreen is blank, the LED on the operator panel right cover is
off, no fans turn, no motors turn, and the fuser lamp does not come on.
If a high-capacity input tray is installed, remove the option and check the printer for correct operation. If the
printer operates correctly, go to
continues to not operate correctly, remove any other attached paper handling options.
Warning: Observe all necessary ESD precautions when removing and handling the system board or any
installed option cards or assemblies. See
CAUTION
When you see this symbol, there is a danger from hazardous voltage in the area of the product
where you are working. Unplug the product before you begin, or use caution if the product
must receive power in order to perform the task.
Remove any input and output paper handling options from the printer.
FRU
1 Line voltage
AC line cord
2
Action
Make sure the toner cartridge is correctly installed and that the right
and left cartridge tracks are not loose or broken. Make sure the cover
closed switch activation tab on the toner cartridge is not broken and
that the tab correctly activates the cover closed switch spring.
Check the cover closed switch for proper mechanical operation. If
incorrect, repair as necessary. Disconnect the cover closed switch
cable from J8 at the system board and measure the voltage at J8-3. It
measures approximately +5 V dc. If the voltage is incorrect, replace
the system board. If the voltage is correct, check the voltage at J8-1.
If the voltage measures greater than +1.0 V dc, replace the system
board. If the voltage is correct, check the continuity between J8-1 and
J8-3 on the cable. If no change in continuity occurs as the switch is
activated, replace the hinge assembly. If the continuity changes as
the switch is activated, replace the system board.
Cover closed switch table
J8
Pin number
Pin 1-3
Pin 1-2
"High-capacity feeder input tray service check" on page
"Handling ESD-sensitive parts" on page
Action
Check the AC line voltage. If the line voltage is incorrect, inform the
customer.
Unplug the line cord from the wall outlet and check the line cord for
damage, such as, a damaged plug, or cut or damaged cord. If
incorrect, replace the cord. If incorrect, check the continuity of the line
cord and replace if necessary. If the cord is correct, go to step 3.
Switch status
Cover open
Open
Closed
Diagnostic information
7002-xxx
Cover closed
Closed
Open
2-141. If the printer
4-1.
2-125