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4.4.4. Protection History Display Mode
To enter the Product Mode, to display the Protection History Display Mode.
(1) If no protections have occurred.
FLD
N O P R O T E C T
(2) 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 4 minutes later
and the power supply will be shut off.
(3) 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 identied.
(4) For DC (when the last protection incident was DC protection)
FLD
P R T : D C
Cause: DC output of the power amplier is abnormal.
If the power is turned on without correcting the abnormality, the protection function will work about 6 seconds later
and the power supply will be shut off.
(5) For Power(when the last protection incident was Power protection)
FLD
P R T : P o w e r
Cause: The Power Supply(
±
12V) is abnormal.
b
Additional causes of protection can be due to loose connections, associated components, Microprocessor, etc.
Press the button below to set On/Off. The display then return to the normal mode.
"PRESET -" (AVR-S500BT)
"TUNE -" (AVR-X510BT)
Clearing the protection history
There are two ways to clear the protection history, as described below.
(1) Start up the set in error (protection display) mode and display the error, then press and hold down the below button for
3 seconds.
FLD
P R T : D C
Press the button for 3 seconds.
FLD
P R T : C L E A R
The above is displayed and the protection history is cleared.
FLD
N O P R O T E C T
(2) Initialize. ( 20 page.)
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