Denon AVR-391 Service Manual

27
ADJUSTMENT
Audio Section
Idling Current
Required measurement equipment: DC Voltmeter
1. Preparation
(1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room temperature
15 °C ~ 30 °C.
(2) Presetting
• POWER (Power source switch) OFF
• SPEAKER (Speaker terminal) No load
(Do not connect speaker, dummy resistor, etc.)
2. Adjustment
(1) emoved top cover and set VR41(FL),VR45(FR),VR42(C),VR44(SL),VR43(SR), on Main Amp. Unit at fully
counterclockwise position.
(2) Connect DC Voltmeter to test points (Front-Lch:CN51,Front-Rch:CN55,CENTERch:CN53,
Surround-Lch:CN52,Surround-Rch:CN54).
(3) Connect power cord to AC Line, and turn power switch "ON".
(4) Presetting.
MASTER VOLUME : "---" counterclockwise (
c
min.)
SPEAKER (Speaker terminal) : No load
(Do not connect speaker, dummy resistor, etc.)
FUNCTION : DVD
(5) Within 2 minutes after the power on, turn VR41 clockwise (
x
) to adjust the TEST POINT voltage to
1.5 mV ± 0.5 mV DC.
(6) After 10 minutes from the preset above, turn VR401 to set the voltage to 2.0 mV ± 0.5 mV DC.
(7) Adjust the Variable Resisters of other channels (VR42-VR45) in the same way.
CN54
VR41 VR44 VR42 VR43 VR45
CN51
CN52
CN53
CN55
F Lch
S Lch
C ch
S Rch
F Rch
DC Voltmeter
MAIN UNIT ASS'Y

Denon AVR-391 Specifications

General

Number of Channels	5.1
HDMI Inputs	4
HDMI Outputs	1
Dolby Formats	Dolby Digital, Dolby Pro Logic II
Audio Return Channel	Yes
Component Video Inputs	2
Digital Optical Inputs	1
Digital Coaxial Inputs	1
Response Bandwidth	10 Hz - 100 kHz
Signal-To-Noise Ratio	98 dB
THD	0.08%
Input Impedance	47 kOhms
Input Sensitivity	200 mV
Tuner Bands	AM/FM
Power Output	75 Watts per channel
DTS Formats	DTS
Tuner Frequency Range	FM: 87.5 - 108 MHz
Video Inputs/Outputs	Composite
Audio Inputs/Outputs	Digital Optical
Dimensions	434 x 151 x 319 mm
Weight	8.5 kg