3.5. Errors checking mode (Displaying the protection history)
3.5.1.Operation specifications
Error mode (Displaying the protection history):
When the set is started up in this mode, the error information is displayed.
3.5.2.About the display on the FL display
When the "
STATUS
" button is pressed after the error (protection history display) mode is set, a history like the one shown
below is displayed, depending on the conditions.
(1) Normal (when there has been no protection incident)
FLD
N O
P R O T E C T
(2) For ASO (when the last protection incident was ASO protection)
FLD
P R T : A S O
Cause:
The line between speaker terminals is shorted, or speakers with impedance of less than the rated value.
Supplementary information:
As the excess current is detected after operation of the speaker relay, a short on the
speaker terminal and the connected speaker can be identified.
If the power is turned on without correcting the abnormality, the protection function will work about 5 seconds later
and the power supply will be shut off.
(3) For DC (when the last protection incident was DC protection)
FLD
P R T : D C
Cause:
DC output of the power amplifier is abnormal.
If the power is turned on without correcting the abnormality, the protection function will work about 5 seconds later
and the power supply will be shut off.
(4) For THERMAL (when the last protection incident was THERMAL(A) or THERMAL(B) protection)
FLD
P R T : T H E R M A L
A
FLD
P R T : T H E R M A L
B
Cause:
The temperature of the heat sink is excessive.
If the power is turned on without correcting the abnormality, the protection function will work about 5 seconds later
and the power supply will be shut off.
b
Additional causes of protection can be due to loose connections, associated components, Microprocessor, etc.
When the "
STATUS
" button is pressed again after the protection history as shown above is displayed, the normal display
reappears.
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