Electric Problems; The Machine Does Not Operate When The Main Power Switch Is Turned On; Scanner Motor Does Not Operate/Duplex Motor Does Not Operate; Toner Motor Does Not Operate - Kyocera TASKalfa 1800 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)
Scanner motor
does not operate.
(3)
Duplex motor does
not operate
(4)
Toner 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.
6. Defective main/
engine 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 main power switch.
Replace the power source PWB (see page 2-2-27).
Replace the main/engine PWB and check for correct oper-
ation (see page 2-2-11).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Scanner motor and main/engine PWB (YC1)
Check if the gears rotate smoothly. If not, grease the
bushes and gears. Check for broken gears and replace if
any.
Replace the scanner motor.
Replace the main/engine PWB and check for correct oper-
ation (see page 2-2-11).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Duplex motor and main/engine PWB (YC2)
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 duplex motor.
Replace the main/engine PWB and check for correct oper-
ation (see page 2-2-11).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Toner motor and main/engine PWB (YC12)
Replace the toner motor.
Replace the main/engine PWB and check for correct oper-
ation (see page 2-2-11).
1-4-90
2NC/2NF/2NG/2NN/3P7/3P8/3P9