AMSTRAD PC1640 - Flowchart

FD-3
FLOWCHART
Are
connectors
correctly
plugged?
NO
Plug
correctly
YES
Medium
may
be
faulty
Is
short
bar
setting
correctly?
NO
Set
normally
YES
YES
YES
JiH
Is
medium
rotating?
NO
Does
it read
if
changed
to
another
medium
7
«
NO
A.
Is
alignment
OK?
-NO
Jil<L
Does
cariage
operate
properly
7
NO.
Check step
motor
and
circuit
head
driving
mechanism
operating
step
motor.
YES
Does
read
waveform
show
after
adjustment?
YES
Adjustment,
alignment
M^
Is
power
fed?
NO-
Check
power
YES
1_
Does
DC
motor
operate?
(Apply
12V)
NO.
Change
DC
motor
YES
NO
Is spindle
speed
OK?
NO
V
Read
circuit
has
a
problem.
Exchange
MC3470AP.
Change
printer
circuit
board.
YES
Are
cords
and
wires
correctly
connected
7
NO.
Correct
incorrect
wiring.
YES
Over-
speeding?
Is
index
signal
sent
correctly?
NO
V
I
YES
_y_
Is
TRKOO
OK
7
YES
Check
motor
control
printed
circuit
board.
Is
servo cord
disconnected
from
motor
7
NO
V
NO
YES
1
Is
motor
start
time
appropriate
7
V
NO
YES
Read
circuit may
have
problems.
Change
MC3470AP.
Change
printed
circuit board.
YES
iZ_
Operating
normally?
YES
OK
Is
motor
ON
signal
sent?
NO
Check
signal
on
system
side
Possibility
of
or head
cord
trouble.
YES
V
Is
index
sent
7
—NO
YES
±
Possibility
of circuit
part
faults.
Adjust
centering
motor-control
printed
circuit
board.
Adiust
Index
sensor
is faulty
JL
Adjust
V
Adjust
Can
it be
adjusted?
-YES-
OK
NO
Change
motor
Drive
has
problem
(Medium
slip
or
other
reason).
17