Sharp MX-C507P Service Manual page 287

Action
Step 3
Check the Ethernet and controller board LEDs on the control panel.
Are the LEDs on?
Step 4
Check the ribbon cable connection on the control panel and
controller board.
Is the cable properly connected at both ends?
Step 5
Reconnect the cable.
Does the problem remain?
Step 6
Check the cable for damage, and replace if necessary.
Does the problem remain?
Step 7
Replace the control panel cable.
Does the problem remain?
Step 8
Replace the control panel. See
page 317.
Does the problem remain?
Step 9
Disconnect the LVPS cable from the controller board, and then
measure the voltages of the red and orange wires.
Is the reading on the red wire +6.5 V, and the orange wire +25 V?
Step 10
Replace the LVPS cable.
Does the problem remain?
Step 11
Replace the LVPS. See
Does the problem remain?
"Upper control panel removal" on
"LVPS removal" on page
Diagnostics and troubleshooting
Yes
Go to step 4.
Go to step 6.
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 12.
Go to step 12.
Go to step 11.
Go to step 12.
342.
253
5028
No
Go to step 9.
Go to step 5.
The problem is
solved.
The problem is
solved.
The problem is
solved.
The problem is
solved.
Go to step 10.
The problem is
solved.
The problem is
solved.