2-134 Service Manual
7526
956.xx—System board failure service check
5 V interlock switch service check
Step Questions / actions Yes No
1 Turn the printer off, and remove the rear
frame cover. See “Rear frame cover
removal” on page 4-40.
Check the cable in connector J49 (A) for
proper connection to the system board.
Is the cable seated correctly?
Replace the system board.
See “System board
removal” on page 4-165.
Reseat the cable.
Step Questions / actions Yes No
1 Is the +5 V switch (B) damaged? Replace the 5 V interlock
switch. See “5 V interlock
switch cable removal” on
page 4-52.
Go to step 2.
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