Denon AVR-S750H Service Manual

ADJUSTMENT for E2, JP model
Adjusting Idling Current
NOTE：Adjusting the idling current when "ECO Mode" is set may damage the Power AMP.
1. Preparation
(1) Prepare a DC voltmeter.
(2) Place the unit under normal usage conditions, away from highly ventilated areas such as next to an
air conditioning machine or electric fan.
The set requires an ambient temperature of 15℃ to 30℃ and standard humidity.
(3) Settings of This Unit
• POWER (Power source switch) STANDBY
• SPEAKER (Speaker terminal) No load
(Do not connect equipment such as speakers or dummy resistors.)
2. Adjustment Procedure
(1) Make sure that "ECO Mode" is off.
• Press the "
SETUP
" button on the remote control to display the GUI menu.
• Press the cursor button to select "General" → "ECO" → "Mode" → "Off".
(2) Remove the top cover and turn VR510 (ALL Channel) of the MAIN PCB counterclockwise(
c
) as far as
possible.
(3) Connect the DC Voltmeter to the test points.
FRONT-Lch : CN510 : VR510
FRONT-Rch : CN550 : VR550
CENTER ch : CN530 : VR530
SURROUND-Lch : CN520 : VR520
SURROUND-Rch : CN540 : VR540
SURROUND-BACK Lch : CN560 : VR560
SURROUND-BACK Rch : CN570 : VR570
(4) Connect the power cord to an outlet. Next, press the power button to turn on the power.
(5) Set this unit as follows.
MASTER VOLUME : "---" (
c
min.) : turn counterclockwise to the lowest position.
SPEAKER (Speaker terminal) : No load
(Do not connect equipment such as speakers or dummy resistors.)
MODE : MCH STEREO
FUNCTION : TUNER
(6) Turn VR510 clockwise (
x
) and adjust the voltage of the test point to "
4.0mV ± 0.5mV DC
" within 2
minutes.
(7) Check whether the voltage is within the range "
4.0mV ± 1mV DC
" 10 minutes after adjustment.
(8) Adjust the variable resistance of each channel using the same method.
F Rch S Rch C Rch S Lch F Lch S Back Rch S Back Lch
VR550 VR540 VR530 VR520 VR510 VR570 VR560
SBRSBL
SL SR
CEN
FL
FR
CN550 CN540 CN530 CN520 CN510 CN570 CN560
DC Voltmeter
AMP UNIT
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
151

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