AMSTRAD PC1640 - Page 16

V
Is termination
resistor correctly
attached?
NO
Mount
correctly
YES
1_
Is environment
condition
appropriate?
YES
1_
NO
^>
Set up
environmental
condition
appropriately
Are errors
caused
after
changing
to
another medium?
NO Medium may
be
faulty
YES
Is a very
large noise source
present?
YES Remove
noise
source
NO
1
Is
thefe
sufficient head
head
pressure
NO
M
Change head
YES
A.
Are errors
caused
on inner
circumference
of
tracks?
NO
Is index
signal correctly
sent?
.
•
*
Y
\
ES
I
NO
Is
azimuth
azimuth
Tilting of guide
shafts
due to shock,
or heads
are defective
YES
Is
seek
operation
normal?
NO
-5*
Check
step
motor and
driving
mechanism
YES
Is
time margin
of inner
circumference
tracks sufficient?
YES
A
*
i
NO
YES
\y
Change
the printed
circuit board. Change
the
head if problem
is not solved.
Is
power
NO
Check
power
ripple
noise
correctly fed?
Check data
separator
on system side
YES
J±
Check
circuit
(Read
errors are caused)
16