Electrical Problems; The Scanner Motor Does Not Operate; Cooling Fan Does Not Operate; The Feed Clutch Does Not Operate - Kyocera KM-1820 Service Manual

2GM

1-5-4 Electrical problems

Problem
(1)
The machine does
not operate when
the power switch is
turned on.
(2)
The main motor
does not operate
(C2000).
(3)
The scanner motor
does not operate.
(4)
Cooling fan does
not operate.
(5)
The feed clutch
does not operate.
1-5-22
Causes
No electricity at the power
outlet.
The power cord is not
plugged in properly.
The front cover is not
closed completely.
Broken power cord.
Defective power switch.
Blown fuse in the power
supply PWB.
Defective interlock switch.
Defective power supply
PWB.
Poor contact in the main
motor connector terminals.
Broken main motor gear.
Defective main motor.
Defective engine PWB.
Broken scanner motor coil.
Poor contact in the scan-
ner motor connector termi-
nals.
Broken Cooling fan coil.
Poor contact in the Cool-
ing fan connector termi-
nals.
Broken feed clutch coil.
Poor contact in the feed
clutch connector terminals.
Defective engine PWB.
Check procedures/corrective measures
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check the front cover.
Check for continuity. If none, replace the cord.
Check for continuity across the contacts. If none, replace the
power switch.
Check for continuity. If none, remove the cause of blowing and
replace the fuse.
Check for continuity across the contacts of switch. If none, re-
place the switch.
With AC present, check for 24 V DC at YC2-6 and 5 V DC at
YC2-1 on the power supply PWB. If none, replace the power
supply PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check visually and replace the main motor if necessary.
Check if the main motor operates and replace the main motor if
necessary.
Check if YC4-9 on the engine PWB go low when the main motor
is operated. If not, replace the engine PWB.
Check for continuity across the coil. If none, replace the scanner
motor.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity across the coil. If none, replace Cooling fan.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity across the coil. If none, replace the feed
clutch.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if YC4-1 on the engine PWB goes low when the feed
clutch is turned on. If not, replace the engine PWB.