500-Sheet Drawer Option Service Check - Lexmark C750 Service Manual

5060-00x

500-Sheet drawer option service check

If the paper does not feed from the 500-sheet option, see
Whenever the 500-Sheet Tray is removed, use care as the autocompensator may be in its down position which
could result in damage to the autocompensator assembly.
The tray empty sensor, paper low sensor, and pass thru sensor for any installed tray x (x=2 through 4) can be
checked using the Input Tray
The base printer does not recognize that tray x is installed.
Step Action and questions
1 Is tray x the only paper input option that is not
recognized?
2 Make sure the printer and any option above tray x is
installed correctly.
Is the printer and any options installed correctly?
3 Verify correct installation of the lower options
autoconnect cable to engine board connector J5.
Is the cable to J5 installed correctly?
4 Autoconnect cables—check the autoconnect from the
printer or option above tray x. Check for cuts, pinched
wiring, or damage to the contacts in the connector.
Are there any problems with the autoconnect cables?
5 Tray x autoconnect cable—check the tray x
autoconnect cable(s) for correct installation at the tray x
system board.
Are the tray x autoconnect cable(s) connected
correctly?
6 Tray x autoconnect cable continuity—check the
continuity of the tray x autoconnect cable(s).
Is there continuity?
7 Disconnect J5 from the engine board and check the
voltages on connector J5 on the engine board.
The voltages should measure:
Note: All voltages are approximate values.
Connector pins Voltage
J5-1
J5-3
J5-5
J5-6
J5-8
Are the voltages correct?
2-108
Service Manual
"Sensor Test" on page
+24 V dc
+5 V dc
+5 V dc
+5 V dc
+5 V dc
"Autocompensator service check" on page
3-24.
Yes
Go to step 5
Go to step 3
Go to step 4
Repair or replace
as necessary
Go to step 6
Go to step 7
Replace electronic
size sensing
assembly (includes
the system board)
2-114.
No
Go to step 2
Install the option
correctly and
recheck
Install the cable
correctly and
recheck
Go to step 5
Install the cables
correctly and
recheck
Replace electronic
size sensing
assembly (includes
the system board)
Replace the engine
board