Lexmark Optra C710 Service Manual page 144

5016-001
FRU
2 S3, S4 Interlock
Switch Cables.
Printhead to
Engine Board
Cable
B 934 and 935 Error Codes
FRU
1 Engine Board to
Printhead Cable
2 Engine Board to
Printhead
2-78
Service Manual
Action
Check the cable from the interlock microswitch S3
Pin 1 (orange lead) to connector CNLS2 on the
printhead and the yellow jumper from S3 Pin 2 to
S4 Pin 2. Be sure these cables are connected
properly and are not damaged. Be sure to note the
interlock switch cable connector mounted to the
left side frame.
If a problem is found with any of these cables,
replace the failing cable.
Check the printhead to engine board cable for
correct installation and damage.
• If correct, check the continuity of the cable.
• If incorrect, replace the cable and go to B.
Action
Check the cable for damage and correct
installation. Check continuity of the cable. If not
correct, replace the cable.
Check the following voltages:
Engine board CN14
Pin # Signal Voltage
Pin 5 +24 V dc
Pin 6 +5 V dc
Pin 19 +5 V dc
All voltages are approximate.
• If any voltage is incorrect, replace the engine
board.
• If voltages are correct, replace the printhead
first.
• If this does not fix the problem, replace the
engine board.
Voltage
+24 V dc
+5 V dc
+5 V dc