LD301 blinks 12 times.
Fan lock error.
Is CN24 connected?
Is the propeller fan
locked?
Have the 1A fuse and
R107 blown?
Is +15V being generated?
Check voltage both between
CN18 3 and 6 on the main
P.W.B., and between +15V
and 15-0V (silk-screened) on
the main P.W.B.
Is the fan operating?
(An error occurs after the
fan operates for 2 minutes.)
Is the voltage between 4
and 6 at CN24 normal?
(Normally, the voltage is
above approx. DC1.7V.)
Connect the connector.
Remove any
obstructions.
Replace the fan motor
and main P.W.B.
Is the voltage between 4 and
7 at CN24 normal?
Check to see if the voltage is
within 2.5V
0.5V using a
tester.
(In effect, the output voltage
is alternately switched
between 5V and 0V.)
Replace the main
P. W. B.
Replace the fan motor.
Yes
No
No
No
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
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