Lexmark C752 Service Manual page 135

Step Action and questions
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 J37 from the system board and check the
voltages on connector J37 on the system board.
Note: All voltages are approximate values:
Connector pins
J37-1
J37-2
J37-3
J37-4
J37-5
J37-7
J37-8
Are the voltages correct?
Tray x autocompensator fails to retract, stays in down position.
Step Action and questions
1 Use care when removing a tray assembly when the
autocompensator is in its down position. Remove the
tray and manually reset the autocompensator to its
uppermost position by actuating the pick arm lift
bellcrank.
Does the autocompensator assembly stay in the up
position?
Carefully replace the tray and recheck to see if the
2
autocompensator operates correctly.
Does the autocompensator assembly operate
correctly?
3 Make sure the autocompensator pick arm lift bellcrank
is installed correctly.
Is the pick arm lift bellcrank installed correctly?
4 Check the following for loose, broken, or missing parts:
• Boss on the side of the arm
• Bellcrank lift spring
• Tray interlock bellcrank
Are any of these parts loose, broken, or missing?
Voltage
+5 V dc
Ground
Ground
+5 V dc
+24 V dc
+5 V dc
+5 V dc
Yes No
Go to step 6 Install the cables
correctly and
recheck
Go to step 7 Replace
electronic size
sensing
assembly
(includes the
system board)
Replace Replace the
electronic size "System board"
sensing on page 4-67
assembly
(includes the tray
system board)
Yes No
Go to step 2 Go to step 3
Problem solved Go to step 3
Go to step 4 Install the
bellcrank
correctly
Repair or replace Call your next
as necessary level of support.
Diagnostic information
5060-2XX
2-101