False Paper Jam; Duplex Tray Jam - Ricoh FT7770 Service Manual

False Paper Jam

1) Continuous jam condition / Nothing wrong with other
mechanical/electrical functions
If the voltage between TP218 (TPTH) and ground on the main board
is not in the normal range (+1.31V to +1.35V), readjust it using
VR202 on the main board.

Duplex Tray Jam

1) Paper jam is
Does the paper
o Check
clean
o Check
Paper
Is the curl of the paper stacked in the duplex tray less than
10 mm?
Does the curl become less than 10mm after turning over the
paper in the paper tray?
Ask the customer to use a recommended brand of paper.
Ask the customer to change the paper stack direction when
he has the same problem in the future.
Make sure that the machine is properly grounded and that the
antistatic brush is properly installed.
due to improper paper stacking
pass under the diagonal roller?
the drive mechanism of the diagonal roller, and
or replace any defective parts.
and correct the bottom plate mechanism. (Refer to
Jam in Duplex Tray 2).")
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30 April, '89