Advertisement
1.
ffi
d:
s
AR
1{t
(G
ffi
AA
e]
s
ffi
A!
ffi
ffi
a
s
AI
AI
(i
Ai
ffi
ffi
*
Ft
A1
AE
At
fit
gt
(Q
ffi
(!
A1
ffi
<i
A!
*e
ffi
<a
<re
'(i ci
fit
IG
tfi
g!
gt
4A
qfi
aa
ta
A-t
gt
ffi
Ai
qa
,It
,G
ta
ffi
AI
ta
m
At
qt
ffi
d.
How
to find
the short-circuits which
break
the
fuse
(F601).
a.
Locate
the short-circuit
parts on
the AC.
input circuit by
referring
to
the
item
vt,
3,3-4,
3.
b.
To
locate
the
short-circuit
parts
on the
power
supply
board.
1).
Pull out the connector 59,
S11, and
S8
from
the power supply
board
and
the connector
Sl
and 56
from
the main
P.C.B.
2).
Set
the
tester
to
the
Sl
x
1
range
and connect
the
black terminal
of
the
tester
to
No.1
(orange
cord) and
the
red
terminal
to
No.2
pin
(black
cord)
of
the connector
S1.
(Fig.
23).
3).
The indicator
of
the
tester
moves
to
0Q at first
and back
to
the
-O,
Slowly.
lf
it
does
not
stop 0S/, there
are
no short-circuits
on the
power supply
board.
lf
it
show
0C2,
there is
a
short-circuit on the
power supply board
and
if
you
can
not find
the short-circuit
parts,
replace
the
power
supply
board
with
a
new one.
To
locate
the short-circuit
parts on
the
needle
selector solenoids.
Check
the
resistance
of
the
needle
selector
solenoids
by
referring
to
the
item
Vll,2.
lf
the indicator
of
the tester
shows
0Q,
replace
the
needle selector
solenoid
itself or the
unit
with
a
new
one,
Locate
the short-circuit
on
the
stepping
motor
for
card feeding
by
referring
to
the item
X,4,
4-2.
4.
Checking
the
DC. section.
4-1. The card feeding
dial
does
not
ratchet
but
buzzer
makes
a
sound.
The
power
supply
pilot
lamp and the stepping
motor
for
card feeding
are
worked by +12VDC
REG.
supplywhich
is
taken
from
the +12VDC
UNREG.
supply.
A fault
on
the +12VDC
REG. power supply
could
be
duetoafaultonthe
supply itself, the +12VDC
UN
REG.
supply or the route
between them.
Check
this route
and
ifthere
are
no defects,
replace
the
power
supply
board.
*Check
the route
between
the AC. input and
power
supply
pilot
lamp.
(Fis.
24).
Fis.24
1.
Check
the route
between
the connector
S1
and
the
power
supply
board.
Pull out connector
S1
from
the
main
P.C.B.
and
turn
on the
power switch.
Set
the
tester
tothe
DCV 30
range
and check
the
voltage
of
the connector
S1,
The voltage between
No.4
(red cord)
and
No.3 pins
(black
cord)
is
+5V
t
5%
and
No.
1
(orange
cord)
and
No.2 pins
(black
cord)
is
+12V
to
15V.
(Fig. 25).
lf
No.1
pin
ur
tsJ
I
/'
Fig.25
s
Stepping mo
Pilot
lamp
tor
s
TPn*",
I
cord
supply
n
Fig.23
Advertisement
