Denon AVR-4800 User Manual

60
15
TROUBLESHOOTING
If a problem should arise,first check the following.
1. Are the connections correct ?
2. Have you operated the receiver according to the Operating Instructions ?
3. Are the speakers, turntable and other components operating property ?
If this unit is not operating properly, check the items listed in the table below. Should the problem persist, there may be a malfunction.
Disconnect the power immediately and contact your store of purchase.
Symptom Cause Measures Page
DISPLAY not lit and sound not produced
when power switch set to on.
• Power cord not plugged in securely. • Check the insertion of the power cord plug.
• Turn the power on with the remote control
unit after turning the POWER switch on.
6
39
DISPLAY lit but sound not produced.
• Speaker cords not securely connected.
• Improper position of the audio function
button.
• Volume control set to minimum.
• MUTING is on.
• Digital signals not input Digital input
selected.
• Connect securely.
• Set to a suitable position.
• Turn volume up to suitable level.
• Switch off MUTING.
• Input digital signals or select input jacks to
which digital signals are being input.
12 ~ 14
40
41
42
40
DISPLAY not lit and power indicator is
flashing rapidly.
• Speaker terminals are short-circuited.
• Blocked ventilation holes resulting in too
high operating temperature.
• The unit is operating at continuous high
power conditions and/or inadequate
ventilation.
• Switch power off, connect speakers
properly, then switch power back on.
• Turn off the set’s power, then ventilate it
well to cool it down.
Once the set is cooled down, turn the
power back on.
• Turn off the set’s power, then ventilate it
well to cool it down.
Once the set is cooled down, turn the
power back on.
12 ~ 14
4, 5
4, 5
Sound produced only from one channel.
• Incomplete connection of speaker cords.
• Incomplete connection of input/output
cords.
• Connect securely.
• Connect securely.
12 ~ 14
6 ~ 15
The on screen display is not displayed.
• “On screen display” is set to off on the
system setup menu screen.
• Set “on screen display” on the system
setup menu screen to on.
29, 30
Positions of instruments reversed during
stereo playback.
• Reverse connections of left and right
speakers or left and right input/output
cords.
• Check left and right connections.
12 ~ 14
Humming noise produced when record is
playing.
• Ground wire of turntable not connected
properly.
• Incomplete PHONO jack connection.
• TV or radio transmission antenna nearby.
• Connect securely.
• Connect securely.
• Contact your store of purchase.
6
6
—
Howling noise produced when volume is
high.
• Turntable and speaker systems too close
together.
• Floor is unstable and vibrates easily.
• Separate as much as possible.
• Use cushions to absorb speaker vibrations
transmitted by floor. If turntable is not
equipped with insulators, use audio
insulators (commonly available).
—
—
Sound is distorted.
• Stylus pressure too weak.
• Dust or dirt on stylus.
• Cartridge defective.
• Apply proper stylus pressure.
• Check stylus.
• Replace cartridge.
—
—
—
Volume is weak. • MC cartridge being used.
• Replace with MM cartridge or use a head
amplifier or step-up transformer.
6
This unit does not operate properly when
remote control unit is used.
• Batteries dead.
• Remote control unit too far from this unit.
• Obstacle between this unit and remote
control unit.
• Different button is being pressed.
• < and > ends of battery inserted in reverse.
• Replace with new batteries.
• Move closer.
• Remove obstacle.
• Press the proper button.
• Insert batteries properly.
31
31
31
—
31
Common problems arising when listening to the CD, records, tapes, and FM broadcasts, etc.When playing recordsRemote control unit.

Denon AVR-4800 Specifications

Power Amplifier

stereo rated output	125 W + 125 W (8 Ω/ohms, 20 Hz ~ 20 kHz with 0.05% T.H.D.)
surround rated output	125 W x 5 ch (8 Ω/ohms, 1 kHz with 0.7% T.H.D.)
dynamic power	170 W x 2 ch (8 Ω/ohms), 270 W x 2 ch (4 Ω/ohms), 350 W x 2 ch (2 Ω/ohms)

Analog Audio

input sensitivity / input impedance	200 mV / 47 kΩ/kohms
frequency response	10 Hz ~ 100 kHz: +0, –3 dB (DIRECT mode)
S/N ratio	105 dB (DIRECT mode)

Digital Audio

D/A output rated output	2 V (at 0 dB playback)
total harmonic distortion	0.005% (1 kHz, at 0 dB)
S/N ratio	105 dB

Phono Equalizer

input sensitivity	2.5 mV
RIAA deviation	±1 dB (20 Hz to 20 kHz)
signal-to-noise ratio	74 dB (A weighting, with 5 mV input)

Video

standard video jacks input/output level and impedance	1 Vp-p, 75 Ω/ohms
S-video jacks input/output level and impedance	Y signal — 1 Vp-p, 75 Ω/ohms; C signal — 0.286 Vp-p, 75 Ω/ohms
color component video terminal input/output level and impedance	Y signal — 1 Vp-p, 75 Ω/ohms; Cb signal — 0.7 Vp-p, 75 Ω/ohms; Cr signal — 0.7Vp-p, 75 Ω/ohms

Tuner

receiving range	87.5 MHz ~ 107.9 MHz, 520 kHz ~ 1710 kHz
usable sensitivity	1.0 µV (11.2 dBf), 18 µV
signal to noise ratio (IHF-A)	MONO 80 dB, STEREO 75 dB

General

power supply	AC 120 V, 60 Hz
power consumption	10.9 A
maximum external dimensions	434 (W) x 181 (H) x 494 (D) mm (17-3/32” x 7-1/8” x 19-29/64”)

Remote Control Unit

batteries	R6P/AA Type (two batteries)
external dimensions	70 (W) x 215 (H) x 24 (D) mm (2-3/4” x 8-15/32” x 15/16”)
weight	200 g (Approx. 7 oz) (including batteries)