Action Yes No
Step 1
a Turn o the printer, and then unplug the power cord.
b Remove the rear door and cover. See “Rear door and cover
removal” on page 295.
c Remove the right cover. See “Right cover removal” on
page 237.
d Reseat all the cables from the controller board.
e
Reseat all the cables from the power supply.
Does the problem remain?
Go to step 2. The problem is
solved.
Step 2
a Turn o the printer, and then remove the power cord.
b Check if the resistance (between terminals A and D) of the
power supply socket is close to 30 ohms.
Does the socket have a normal resistance value?
Go to step 3. Go to step 5.
Step 3
a Disconnect the fuser cable from the power supply, and then
turn on the printer.
b
Check if the voltage output of the fuser cable
socket on the power supply is normal (100V, 110V,
or 220V).
Does the power supply provide the fuser with the normal voltage
value?
Go to step 4. Go to step 5.
Step 4
a Turn o the printer, and then remove the power cord.
b Remove the power supply. See “Power supply removal” on
page 273.
c
Check the power supply, including its fuse and
capacitors, for damage.
Is the power supply free of damage?
Contact the next
level of support.
Go to step 5.
Step 5
Replace the power supply. See
“Power supply removal” on
page 273.
Does the problem remain?
Go to step 6. The problem is
solved.
7018
Diagnostics and troubleshooting
136
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