Olivetti d-Copia 6500MF Plus Service Manual page 666

(5) Error symptom at an erroneous insertion of the engine PWB FFC
If an FFC is inserted improperly, the following symptom could be observed:
YC2
YC13
Engine PWB Connect PWB
YC6
YC5
YC4
YC11
YC50
Service Manual
YC26
YC7
YC8
FEED1 [The cover is open](right cover1)
[Machine failure] (C2300)
FEED1 [Machine failure] (C2211)
[Paper jam] (JAM4101_15)
FEED2 [The cover is open] (right cover1)
[Machine failure] (C2500)
[Paper jam] (JAM0000_02,03,10,15)
LSU [System error] (C4101)
[Machine failure] (C4101)
Main [System error] (F040)
YC22
YC9
Engine PWB
Figure 1-5-134
Occurrence
1-5-86
YC20 YC19
U100
YC46
2N8/2N7
Y116520-3