Original Jam; No Display - Ricoh FT7770 Service Manual

DF

Original Jam

Is the feed-in motor energized when the main switch is turned
on?
Y N
I
Does the Misfeed indicator light when the main switch is
turned on?
Check the lift switch, feed-in safety switch, and the
inverter unit safety switch.
If the jam condition can not be reset, check the
fuse 201 (3A), registration sensor, and exit sensor.
Replace the one-turn sensor.
1) Insert Original indicator does not come on.
Fuse 202 (3A) is blown.
2) No display comes on.
No key can be selected.
Fuse 1 (5A) on the ADF power supply board is blown.
fuse.
3) No display comes on.
DF can not be used.
o Check and replace the lift switch (open condition).
o Check and replace the feed-in unit safety switch (open
condition).
Replace it.
13-35
30 April, '89
Replace the