Denon AVR-S750H Service Manual

3-2. Protection History Display Mode
3-2.1. 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.
3-2.2. Starting up
AVR-X1600H
• While holding down buttons "
ZONE2 SOURCE
", "
DIMMER
" and "
STATUS
" simultaneously, press the
power button to turn on the power.
AVR-S750H
• While holding down buttons "
TUNER PRESET CH +
", "
TUNE -
" and "
TUNE +
" simultaneously, press
the power button to turn on the power.
Select the "
2. PROTECTION
" using the "
TUNER PRESET CH +/-
" button, then press the "
STATUS
" but-
ton then to conrm.
3-2.3. Protection information and displays
• Press the "
STATUS
" button in Protection History Display Mode.
• 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.
If the power is turned on in the abnormal state, protection is activated after around 6 seconds and the
power is turned off.
(5) Case of CURRENT (when the last protection incident is CURRENT protection)
:CURRENT
Cause : An over current owed in power amp.
If the power is turned on in the abnormal state, protection is activated after around 90 seconds and the
power is turned off.
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 "
STATUS
" button to return to the normal display.
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
123

Denon AVR-S750H Specifications

General

Receiver type	stereo
Frequency range	10 - 100000 Hz
Input sensitivity	200 mV
Audio output channels	7.2 channels
Signal-to-Noise Ratio (SNR)	98 dB
Total Harmonic Distortion (THD)	10 %
Power output per channel (1KHz@6 Ohm)	165 W
Power output per channel (20-20KHz@8 Ohm)	75 W
AirPlay	Yes
Display	VFL
HDCP version	2.3
Apple docking	No
Product color	Black
Audio decoders	DTS-HD Master Audio, Dolby TrueHD
Volume control	Rotary
HDMI in	6
Composite video in	2
Digital audio optical in	1
Package depth	432 mm
Package width	523 mm
Package height	229 mm
Package weight	10614 g
AC input voltage	120 V
AC input frequency	60 Hz
Power consumption (standby)	0.5 W
Power consumption (typical)	400 W
AM band range	520 - 1710 kHz
FM band range	87.5 - 107.9 MHz
Supported radio bands	AM, FM
Audio formats supported	AAC, ALAC, DSD, FLAC, MP3, WAV, WMA
Image formats supported	JPEG
Speakers connectivity type	RCA

Weight and Dimensions

Depth	330 mm
Height	152 mm
Weight	8618 g