2BT
1-5-19
1-5-4 Electrical problems
Problem
Causes
Check procedures/corrective measures
(1)
The machine does
not operate when
the main switch is
turned on.
(2)
The drive motor
does not operate .
(3)
The scanner motor
does not operate.
(4)
The toner feed
motor does not
operate.
(5)
Cooling fan motor
does not operate.
(6)
The registration
clutch does not
operate.
No electricity at the power
outlet.
The power cord is not
plugged in properly.
The front cover and/or
paper conveying cover
are/is not closed
completely.
Broken power cord.
Defective main switch.
Blown fuse in the power
source PCB.
Defective safety switch.
Defective power source
PCB.
Poor contact in the drive
motor connector terminals.
Broken drive motor gear.
Defective drive motor.
Broken scanner motor coil.
Poor contact in the
scanner motor connector
terminals.
Broken toner feed motor
coil.
Poor contact in the toner
feed motor connector
terminals.
Broken cooling fan motor
coil.
Poor contact in the cooling
fan motor connector
terminals.
Broken registration clutch
coil.
Poor contact in the
registration clutch
connector terminals.
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check the front cover and paper conveying cover.
Check for continuity. If none, replace the cord.
Check for continuity across the contacts. If none, replace the
main switch.
Check for continuity. If none, remove the cause of blowing and
replace the fuse.
Check for continuity across the contacts. If none, replace the
safety switch.
With AC present, check for 5 V DC at CN1-7 on the power
source PCB, 12 V DC at CN1-8 and 24 V DC at CN1-2. If none,
replace the power source PCB.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check visually and replace the drive motor if necessary.
Run maintenance item U030 and check if the drive motor
operates when CN13-5 on the main PCB goes low. If not,
replace the drive motor.
Check for continuity across the coil. If none, replace the scanner
motor.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check for continuity across the coil. If none, replace the toner
feed motor.
Reinsert the connector. Also check for continuity within the
connector cable. If none, repair or replace the cable.
Check for continuity across the coil. If none, replace cooling fan
motor.
Reinsert the connector. Also check for continuity within the
connector cable. If none, repair or replace the cable.
Check for continuity across the coil. If none, replace the
registration clutch.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
