Olivetti d-Copia 2500MF Service Manual page 171

Problem
(11)
The original size is
not detected cor-
rectly.
(12)
The touch panel keys
do not work.
(13)
The message
requesting paper to
be loaded is shown
when paper is
present on the cas-
sette 1/2 or MP tray.
(14)
The size of paper on
the cassette 1/2 or
MP tray is not dis-
played correctly.
Y108620-5
Causes
1. Original is not placed cor-
rectly.
2. Poor contact in the origi-
nal detection switch or
original size detection
sensor connector termi-
nals.
3. Defective original detec-
tion switch.
4. Defective original size
detection sensor.
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
upper/lower paper switch
or MP paper switch.
2. Defective upper/lower
paper switch or MP
paper switch.
1. Poor contact in the con-
nector terminals of
upper/lower paper size
length switch, upper/
lower paper size width
switch, MP paper size
length switch or MP
paper size width switch.
2. Defective upper/lower
paper size length switch
or MP paper size length
switch.
3. Defective upper/lower
paper size width switch
or MP paper size width
switch.
Check procedures/corrective measures
Check the original and correct 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 YC17-5 on the engine PWB does not go low when
the original detection switch is turned on and off, replace the origi-
nal detection switch.
Check if sensor operates correctly. If not, replace it.
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 go low when the
switch is turned on and off, replace the switch.
Upper paper switch: YC23-B12 on the engine PWB
Lower paper switch: YC23-A5 on the engine PWB
MP paper switch: YC7-6 on the engine 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 go low when the
switch is turned on and off, replace the switch.
Upper paper size length switch: YC23-B2 on the engine PWB
Lower paper size length switch: YC23-A12 on the engine PWB
MP paper size length switch: YC7-13 on the engine PWB
If the level of following terminal on PWB does not change when
the width guide in the cassette 1/2 or insert guide on the MP tray
is moved, replace the switch.
Upper paper size width switch: YC22-5, 7, 11 on the engine PWB
Lower paper size width switch: YC22-6, 8, 12 on the engine PWB
MP paper size width switch: YC7-1, 2, 3 on the engine PWB
Service Manual
2H0/2HZ
1-4-41