AMSTRAD PC1512 - Page 6

FD-3
FLOWCHART
Are
connectors
correctly
plugged?
NO
.. Plug
correctly
r>
Medium may
be
faulty
YES
NO
^
Is
short bar
setting correctly?
Set
normally
>
YES
YES
YES
sk_
Does it read
if changed to
another
medium?
NO
Is
alignment
OK?
YES
Is
spindle
speed
OK?
YES
1_
Is
index
signal
sent
correctly?
YES
XL.
Is TRKOO
OK?
YES
Is
motor start
time
appropriate?
YES
Is
medium
rotating?
NO-
J1L.
Does
cariage
operate
properly?
NO.
Check step
motor
and
circuit head
driving
mechanism
operating
step
motor.
YES
Does
read
waveform
show
after adjustment?
YES Adjustment,
NO
NOi
V
NO
V
NO
Read
circuit may
have problems.
Change
MC3470AP.
Change
printed
circuit
board.
V
NO
V
Over-
speeding?
YES
Check
motor
control
printed
circuit
board. Is
servo cord
disconnected
from motor?
V
Is
index sent?
YES
Index
sensor
is faulty
Adjust
NO
V
-NO
Change motor
alignment
3l
Read
circuit has
a
problem.
Exchange
MC3470AP.
Change
printer
circuit
board.
XL.
Operating
normally?
Possibility of
or head
cord
trouble.
Adjust
X-
Adjust
V
Can it be
adjusted?
V
NO
NO
XL
Is
power
fed? NO
Check
power
YES
A
Does DC
motor
operate?
(Apply
12V)
NO^
Change DC
motor
*
YES
J/
NO^
Are
cords
and
wires
correctly
connected?
Correct
incorrect
wiring.
YES
-
YES
I
OK
Is
motor ON
signal
sent?
NO.
Check
signal
on
system side
YES
*_
Possibility of
circuit
part faults.
Adjust
centering
motor-control
printed
circuit
board.
W
-YES-
OK
Drive has
problem
(Medium
slip
or
other
reason).