Electric Problems - Kyocera ECOSYS FS-1020MFP Service Manual

1-4-4 Electric problems

If the part causing the problem was not supplied, use the unit including the part for replacement.
Troubleshooting to each failure must be in the order of the numbered symptoms.
Problem
(1)
The machine does
not operate when
the main power
switch is turned on.
(2)
Main motor does
not operate.
(3)
Scanner motor
does not operate.
(4)
Cooling fan motor
does not operate.
Causes
1. No electricity at the
power outlet.
2. The power cord is
not plugged in prop-
erly.
3. Broken power cord.
4. Defective power
switch.
5. Defective cover
switch.
6. Defective power
source PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective drive trans-
mission system.
3. Defective motor.
4. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective drive trans-
mission system.
3. Defective motor.
4. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective motor.
3. Defective PWB.
Check procedures/corrective measures
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check for continuity. If none, replace the cord.
Check for continuity across the contacts. If none, replace
the power source PWB (see page 1-5-18).
Check for continuity across the contacts of cover switch. If
none, replace the power source PWB (see page 1-5-18).
Replace the power source PWB (see page 1-5-18).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Main motor and relay PWB (YC4)
Relay PWB and main PWB (YC14)
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
Replace the main motor (see page 1-5-30).
Replace the relay PWB or main PWB and check for correct
operation (see page 1-5-18).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Scanner motor and main PWB (YC18)
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
Replace the scanner unit (see page 1-5-10).
Replace the main PWB and check for correct operation
(see page 1-5-18)
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Cooling fan motor and relay PWB (YC5)
Relay PWB and main PWB (YC14)
Replace the cooling fan motor.
Replace the relay PWB or main PWB and check for correct
operation (see page 1-5-18).
1-4-17
2M4/2M5/2M6/2M7