Denon AVR-S540BT Service Manual

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
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.
(1) If no protections has occurred.
NO PROTECT
(2) 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 identied.
If the power is turned on in the abnormal state, protection is activated after around 6 seconds and the
power is turned off.
(3) DC (if the last protection is DC)
PRT:DC
Cause : DC output of the power amplier 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.
(4) THERMAL (if the last protection is THERMAL(A) or THERMAL(B))
PRT:THERMAL A
PRT:THERMAL B
Cause : Abnormal heat sink temperature.
(5) Case of Power supply (when the last protection incident is Power protection)
PRT:Power
Cause : Abnormal ( ± B, ± 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 "
TUNE -
" button to return to the normal display.
3-4.4. Clearing the Protection History
There are two ways to clear the protection history.
(1) Activate Protection History Display Mode.
Press and hold the following button for 3 seconds.
PRT:DC
Press and hold the "
TUNE +
" button for 3 seconds.
PRT:CLEAR
The above message is displayed and the protection history is cleared.
NO PROTECT
(2) Initialize this unit. (See "Initializing this Unit")
b
Use the method in 3-4.4. (1) if you do not want to erase your settings from this unit.
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
73

Denon AVR-S540BT Specifications

General

Channels	5.2
Power Output per Channel	70 W (8 ohm, 20 Hz - 20 kHz, 0.08% 2ch Drive)
Output Power (6 ohm, 1 kHz, 0.7% 2ch Drive)	90 W
Output Power (6 ohm, 1 kHz, 10% 1ch Drive)	140 W
HDMI Inputs	5
HDMI Outputs	1
HDMI Version	2.0a
HDCP Support	2.2
4K/60 Hz Pass-through	Yes
Dolby Format	Dolby TrueHD, Dolby Digital Plus
DTS Format	DTS-HD Master Audio
Auto Speaker Setup	Yes (Audyssey MultEQ)
Bluetooth	Yes
FM Tuner	Yes
AM Tuner	Yes
Input Sensitivity/Impedance	200 mV / 47 kOhm
Dimensions (W x H x D)	434 x 151 x 319 mm
Ethernet Port	No
Wi-Fi	No
HDR Support	HDR10, HLG
Frequency Response	10 Hz - 100 kHz - +1/-3 dB
Total Harmonic Distortion	0.08% (20 Hz - 20 kHz)
Signal-to-Noise Ratio	98 dB (IHF-A weighted)
USB Port	Yes (Front)