Kyocera 300ci Service Manual page 292

2JZ/2JX/2JV/2H7
Problem
(20)
The touch panel keys
do not work.
(21)
The message
requesting paper to
be loaded is shown
when paper is
present on the cas-
sette or MP tray.
(22)
The size of paper on
the cassette or MP
tray is not displayed
correctly.
(23)
A paper jam in the
paper feed, paper
conveying, fuser,
duplex or eject sec-
tion is indicated when
the main power
switch is turned on.
1-4-74
Causes
1. Poor contact in the touch
panel connector termi-
nals.
2. Defective touch panel or
main operation PWB.
1. Poor contact in the con-
nector terminals of paper
switch 1/2 or MP paper
switch.
2. Defective paper switch 1/
2 or MP paper switch.
3. Defective paper stop-
pers.
1. Poor contact in the con-
nector terminals of paper
size length switch 1/2,
paper size width switch
1/2, MP paper size length
switch or MP paper size
width switch.
2. Defective paper size
length switch 1/2, paper
size width switch 1/2, MP
paper size length switch
or MP paper size width
switch.
1. A piece of paper torn
from copy paper is
caught around feed
switch 1/2/3, MP paper
feed switch, MP paper
conveying switch, regis-
tration switch, duplex
switch, eject switch,
feedshift switch or loop
sensor.
2. Defective feed switch 1/
2/3, MP paper feed
switch, MP paper con-
veying switch, registra-
tion switch, duplex
switch, eject switch,
feedshift switch or loop
sensor.
Check procedures/corrective measures
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
If any keys do not work after running the maintenance item U201
to initialize the touch panel, replace the touch panel or main oper-
ation unit PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
If the level of following terminal on PWB does not change when
the switch is turned on and off, replace the switch.
Paper switch 1: YC4-5 on the feed PWB
Paper switch 2: YC4-11 on the feed PWB
MP paper switch: YC23-11 on the engine PWB
Remove the MP tray unit and check if the paper stoppers are dar-
maged. Replace if necessary.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
If the level of following terminal on PWB does not change when
the switch is turned on and off, replace the switch.
Paper size length switch 1: YC10-B3 on the engine PWB
Paper size width switch 1: YC10-B12, B13, B14 on the engine PWB
Paper size length switch 2: YC10-B5 on the engine PWB
Paper size width switch 2: YC10-B8, B9, B10 on the engine PWB
MP paper size length switch: YC23-2 on the engine PWB
MP paper size width switch: YC23-6, 7, 8 on the engine PWB
Check visually and remove it, if any.
Run maintenance item U031 and turn each switch on and off
manually. Replace the switch if indication of the corresponding
switch on the touch panel is not displayed in reverse.