Kyocera FS-C8520MFP Service Manual page 237

Problem
(27)
The LED lamp
does not turn on
when original is
present on the DP.
(28)
The size of original
on the DP is not
displayed correctly.
(29)
DP paper feed
motor does not
operate.
(30)
DP switchback
motor does not
operate.
Causes
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective DP origi-
nal sensor.
3. Defective PWB.
1. Defective connector
cable or poor con-
tact in the connector.
2. Defective original
size sensor.
3. 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 drive trans-
mission system.
3. Defective motor.
4. Defective PWB.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DP original sensor and DP main PWB (YC3)
DP main PWB (YC1) and engine PWB (YC18)
Replace the DP original sensor.
Replace the DPLED PWB and check for correct operation.
Replace the engine PWB and check for correct operation
(see page 1-5-32).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DP original size width sensor and DP main PWB (YC4)
DP original size length sensor and DP main PWB (YC2)
DP main PWB (YC1) and engine PWB (YC18)
Replace the DP original size width sensor or DP original
size length sensor.
Replace the DP main PWB or engine PWB and check for
correct operation (see page 1-5-29,1-5-32).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DP paper feed motor and DP main PWB (YC9)
DP main PWB (YC1) and engine 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 DP paper feed motor.
Replace the DP main PWB or engine PWB and check for
correct operation (see page 1-5-29,1-5-32).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DP switchback motor and DP main PWB (YC9)
DP main PWB (YC1) and engine 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 DP switchback motor.
Replace the DP main PWB or engine PWB and check for
correct operation (see page 1-5-29,1-5-32).
1-4-49
2MY/2MZ