3-4. Protection History Display Mode
3-4.1. Actions
This mode enables the unit to record and display the event when the THERMAL, ASO or DC protection is
activated.
If protections have been activated multiple times, the latest protection operation is recorded.
3-4.2. Starting up
AVR-S530BT
· While the power is On, hold down buttons "
SOUND MODE
1
", "
TUNER PRESET CH-
" and "
TUNER
PRESET CH+
" for at least 3 seconds.
Displays "
PROTECT
" using the "
TUNE +
" button.
AVR-X540BT
· While the power is On, hold down buttons "
TUNER PRESET CH+
", "
TUNE -
" and "
TUNE +
" for at
least 3 seconds.
Displays "
PROTECT
" using the "
STATUS
" button.
3-4.3. Displays
· The protection history can be checked.
(a) If no protections has occurred.
NO PROTECT
(b) ASO (if the last protection is ASO)
PRT:ASO
Cause
A short circuit occurred between the speaker terminals, or speakers with an impedance outside
the rating were connected.
Note :
Short circuits in speaker terminals or speakers can be identified.
If the power is turned on in the abnormal state, protection is activated after around 6 seconds and the
power is turned off.
(c) DC (if the last protection is DC)
PRT:DC
Cause :
DC output of the power amplifier is abnormal.
If the power is turned on in the abnormal state, protection is activated after around 6 seconds and the
power is turned off.
(d) THERMAL (if the last protection is THERMAL(A) or THERMAL(B))
PRT:THERMAL A
PRT:THERMAL B
Cause :
Abnormal heat sink temperature.
(e) Case of Power supply (when the last protection incident is Power protection)
PRT:Power
Cause :
Abnormal Power supply( ± 12V).
Caution
: These protections may also be activated due to other factors such as disconnection of connec-
tors or operations around the microcomputer.
After viewing the above protection history, press the
AVR-S530BT : "
TUNER PRESET CH-
" button
AVR-S530BT : "
TUNE -
" button
to return to the normal display.
3-4.4. Clearing the Protection History
There are two ways to clear the protection history.
(a) Activate Protection History Display Mode.
Press and hold the following button for 3 seconds.
PRT:DC
AVR-S530BT : Press and hold the "
TUNER PRESET CH-
" button for 3 seconds.
AVR-X540BT : Press and hold the "
TUNE -
" button for 3 seconds.
PRT:CLEAR
The above message is displayed and the protection history is cleared.
NO PROTECT
(b) Initialize this unit. (See "
CAUTION IN SERVICING.
")
b
Use the method in
3-4.4. (a)
if you do not want to erase your settings from this unit.
71
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
Summary of Contents for AVR-S530BT
Page 80: ...www denon com ...
