Sharp MX-C507P - Page 287

5028
Diagnostics and troubleshooting
253
Action
Yes
No
Step 3
Check the Ethernet and controller board LEDs on the control panel.
Are the LEDs on?
Go to step 4.
Go to step 9.
Step 4
Check the ribbon cable connection on the control panel and
controller board.
Is the cable properly connected at both ends?
Go to step 6.
Go to step 5.
Step 5
Reconnect the cable.
Does the problem remain?
Go to step 6.
The problem is
solved.
Step 6
Check the cable for damage, and replace if necessary.
Does the problem remain?
Go to step 7.
The problem is
solved.
Step 7
Replace the control panel cable.
Does the problem remain?
Go to step 8.
The problem is
solved.
Step 8
Replace the control panel. See “Upper control panel removal” on
page 317 .
Does the problem remain?
Go to step 12.
The problem is
solved.
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?
Go to step 12.
Go to step 10.
Step 10
Replace the LVPS cable.
Does the problem remain?
Go to step 11.
The problem is
solved.
Step 11
Replace the LVPS. See “LVPS removal” on page 342 .
Does the problem remain?
Go to step 12.
The problem is
solved.