Integra PLA-50FP1 Manual page 69

(1) Flashing in green (Fan error detected)
Does the fan run when the
main power circuit is turned
ON?
YES
Is +5V available at Pins 13 to
16 of IC9805?
YES
IC9805 and its peripheral
circuits are out of order.
(Caution) How to reset the alarm:
• Turn the power circuit off and on at the main power supply, remote control, or the wall outlet.
NO
Is the power supply (7 to 12V)
available at Pin 1 of P0F1,
P0F2?
Is 5V available at Pin 3 of
P0F1, P0F2?
NO
Is 5V available at Pin PN3?
IC9805 or IC9805 and peripheral
circuits are out of order.
3
NO
YES
YES
NO
NO
YES
IC9802 or IC9802 and pe-
ripheral circuits are out of
order.
The fan is out of order,
where 5V is available.
Since this voltage becomes
0V when the power supply is
turned off, this check should
be carried out after connect-
ing a circuit tester in advance.
Failure in the POWER
unit or in another IC that
uses A+5V.