Electric Problems - Kyocera TASKalfa 6501i Service Manual

1-4-7 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)
MP lift motor does
not operate.
(3)
Scanner motor
does not operate.
(4)
Registration 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 main
power switch.
5. 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 drive trans-
mission system.
3. Defective motor.
4. 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 main power switch.
Replace the power source PWB (see page 1-5-87).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
MP lift motor and relay PWB (YC3)
Relay PWB (YC12) and feed PWB 1 (YC17)
Feed PWB 1 (YC1) and engine PWB (YC6)
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 MP lift motor.
Replace the relay PWB, feed PWB 1 or engine PWB and
check for correct operation (see page 1-5-83).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Scanner motor and ISC PWB (YC5)
ISC PWB (YC3) and main PWB (YC11)
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 motor.
Replace the ISC PWB or main PWB and check for correct
operation (see page 1-5-74).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Registration motor and feed PWB 1 (YC25)
Feed PWB 1 (YC2) and engine PWB (YC5)
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 registration motor.
Replace the feed PWB 1 or engine PWB and check for cor-
rect operation (see page 1-5-83).
1-4-227
2N8/2N7