2FT
1-5-38
(27)
The size of paper in
the drawer 1 is not
displayed correctly.
Poor contact in the paper
length switch connector ter-
minals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective paper length
switch.
Check if YC22-1,2,4 on the engine PCB goes low when the paper
length switch is turned on. If not, replace the paper length switch.
(28)
The size of paper in
the drawer 2 is not
displayed correctly.
Poor contact in the drawer
paper length switch connec-
tor terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective drawer paper
length switch.
Check if YC4-5,6,8 on the drawer main PCB goes low when the
drawer paper length switch is turned on. If not, replace the drawer
paper length switch.
(29)
A paper jam in the
paper feed, paper
conveying or fixing
section is indicated
when the power
switch is turned on.
A piece of paper torn from
copy paper is caught
around registration switch,
exit switch or feedshift
switch.
Check and remove if any.
Defective registration
switch.
Run maintenance item U031 and turn registration switch on and
off manually. Replace registration switch if indication of the corre-
sponding sensor is not light.
Defective exit switch.
Run maintenance item U031 and turn exit switch on and off manu-
ally. Replace exit switch if indication of the corresponding sensor
is not light.
Defective feedshift switch.
Run maintenance item U031 and turn feedshift switch on and off
manually. Replace feedshift switch if indication of the correspond-
ing sensor is not light.
(30)
The message
requesting covers to
be closed is dis-
played when the front
cover and left cover
are closed.
Poor contact in the connec-
tor terminals of safety
switch.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective safety switch.
Check for continuity across each switch. If there is no continuity
when the switch is on, replace it.
(31)
Others.
Wiring is broken, shorted or
makes poor contact.
Check for continuity. If none, repair.
Noise.
Locate the source of noise and remove.
Problem
Causes
Check procedures/corrective measures
Summary of Contents for KM-2550
Page 1: ...SERVICE MANUAL Published in June 2005 842FT112 Version 3 0 KM 2550...
Page 4: ...This page is intentionally left blank...
Page 10: ...This page is intentionally left blank...
Page 123: ...2FT 1 1 4 56 This page is intentionally left blank...
Page 249: ...2FT 2 3 2 Figure 2 3 2 Power source PCB silk screen diagram 220 240 V AC 120 V AC...
Page 267: ...2FT 2 3 20 Figure 2 3 10 Operation unit PCB silk screen diagram...
Page 282: ......
