Sanyo ECR-238 - 44. System Programming

(1) Faulty supply of
Paper to the
printer
(2) Worn paper
feeding roller
and/or paper
holding roller
(3) Stretched or
damaged paper
holding spring
(4) Stretched or
damaged paper
feed roller shaft
spring
(1) Improperly driv-
The spacing be-
tween printed
lines is not
uniform
q. Line spac-
ing is
uneven
10. The paper In standby posi-
free mecha- | tion, the paper ing gear train
nism cannot be on the frame T
doesn't pulled out in the side
work, forward
direction
The print mech-
anism operates
normally, but
the ribbon
mechanism
doesn't work
. The ribbon
mechanism
doesn't
work
(1} Malfunction of
the ribbon feed-
ing drive lever
| PHENOMENON | CONDITION [| = CAUSE | LEVEL | CHECK POINT AND METHOD REPAIR METHOD
ee @ See CAUSE (2) of PHENOMENON 8.
@ Check if the surface of
the paper feeding roller
ass’y and paper holding
roller is worn.
@ Check if the paper hold-
ing spring is stretched or
damaged.
@ In standby position, man-
ually check if the paper
feeding roller rotates for-
ward smoothly.
@ Manually operate the rib-
bon feed driving lever,
and check if it disengag-
es from the cam gear due
to the operation of or
friction from the ribbon
feed driving lever shaft.
(2) Malfunction of
ribbon feeding
lever
(3) Malfunction of
ribbon feeding
lever spring
12. The ribbon |The ribbon feed |(1) Detached/stre-
is not being | driving lever tched ribbon
taken up and ribbon feed- feeding pawl
ing lever oper- spring or dam-
ate normally, aged ribbon
but the ribbon
cannot be taken
up
The ribbon feed
drive lever and
ribbon feeding
lever operate
normally, but
the ribbon can-
not be taken up
feeding pawl
(2) Malfunction of
the detent pawl
(3) Worn or
chipped spool
gear
(4) Faulty rotation A
of a spool gear
@ While manually operating
the ribbon feeding lever,
check the points below:
@ Does the ribbon feed-
ing lever grate against
the ribbon feeding le-
ver shaft?
@® |s the top or bottom
gap of the ribbon
feeding lever so large
that the ribbon feed-
ing lever disengages
from the ribbon feed
driving lever?
© Is the ribbon feeding
lever deformed?
@ See CAUSE (3) of PHENOMENON 8.
@ Replace the worn
roller(s).
@ If stretched or damaged,
replace it with a new
spring.
@ if not, re-assemble the
gear train (see section
3.2.2, |Main Assembly A).
@ if the ribbon feed driving
lever disengages, replace
it.
@ If yes in any of the three
cases, replace the ribbon
unit.
@ Release the ribbon feed
driving lever and move
the ribbon feeding lever
back and forth, then
check if the ribbon feed-
ing lever is returned to its
Original position by the
ribbon feeding lever
spring.
@ Check if the spool gears
rotate smoothly.
@ Check if either the ribbon
feeding pawl spring is
detached/stretched or if
the ribbon feeding pawi
is damaged.
@ Check if the ribbon de-
tecting spring is de-
tached or stretched.
@ Check if the spoo! gears
are worn or damaged.
— 36-
@ If not, replace the ribbon
feeding lever spring.
@ If not, replace the perti-
nent spool gear.
@ If the spring is detached,
re-attach it; if stretched,
replace it.
@ If the ribbon feeding
pawl is damaged, replace
the ribbon unit.
@ If the spring is detached,
re-attach it; if stretched,
replace it.
@ Replace the worn or dam-
aged spool gear.