Mechanical Problems; No Primary Paper Feed - Ricoh A741 Service Manual

3-6-5 Mechanical problems

Problem
(1)
No primary
paper feed.
Causes/check procedures
Check if the surface of the roll paper
feed upper roller of the 1st roll unit
and that of roll paper feed lower
roller A are dirty with paper dust.
Check if the roll paper feed upper
roller of the 1st roll unit and roll pa-
per feed lower roller A are deformed
or worn.
Check if the surface of the roll paper
feed upper roller of the 2nd roll unit
and that of roll paper feed rear roller
B are dirty with paper dust.
Check if the roll paper feed upper
roller of the 2nd roll unit and roll pa-
per feed rear roller B are deformed
or worn.
Check if the surface of the roll paper
feed upper roller of the 3rd roll unit
(optional) and that of roll paper feed
rear roller C are dirty with paper
dust.
Check if the roll paper feed upper
roller of the 3rd roll unit (optional)
and paper feed rear roller C are de-
formed or worn.
Check if the surface of roll paper
conveying rear roller A is dirty with
paper dust.
Check if roll paper conveying rear
roller A is deformed or worn.
Check if the bypass registration
switch operates correctly.
Check if the bypass registration
switch actuator is broken.
Corrective measures
If they are, clean with iso-
propyl alcohol.
Replace if necessary.
If they are, clean with iso-
propyl alcohol.
Replace if necessary.
If they are, clean with iso-
propyl alcohol.
Replace if necessary.
If it is, clean with isopropyl
alcohol.
Replace if necessary.
If CN3-14 on the main
PCB does not change lev-
els when the bypass regis-
tration switch is turned on
and off, replace the switch.
If it is, replace the switch.
340-1
3-6-51