Denon AVR-791 Service Manual

32
YES YES
YES
NO
YES
NO
NO
0.6V or -0.6V
When the power turned on,
does the ON/STANDBY
indicator on the front panel
ashing green?
Is the fuse blown?
About 10 seconds later,
does the ON/STANDBY
indicator on the front panel
turn lighting green ?
Check voltage of N2706 (1-
5PIN) of HDMI B'D while the
ON/STANDBY indicator is
ashing green.
Pull out connector (CP1) of
SPK BD, and check "Errors
checking mode".
(Refer to 18 page.)
Power not turn on.
Is the fuse blown?
Is a DC 5V voltage being
supplied from the SMPS B'D
(CX101) to the µ-com?
Refer to 1.2.Fuse is blown.
Refer to 1.2. Fuse is blown.
Check circuitry and parts from N2706 on
the HDMI B'D to the µ-com for damage
and shortcircuits, and replace any
defective parts.
Check "Errors
checking mode".
(Refer to 18 page.)
Are there any incomplete
connections in the connectors
connecting between the
various circuit boards?
Is a DC 5V voltage output
when the cord supplying the
power from the SMPS B'D
to the HDMI B'D (N2501) is
unplugged?
Check µ-com periphery
circuitry of HDMI B'D and
replace any defective parts.
Check circuitry and parts from
N2501 on the HDMI B'D to the
µ-com power supply for damage
and shortcircuits, and replace
any defective parts.
Connect the connectors properly.
Check for damage
in the SMPS B'D
parts and replace any
defective parts.
NO YES
NO
0V
YES
NO
NO NO
TROUBLE SHOOTING
1. POWER
1.1. Power not turn on
Check for leaks or short
circuits in the primary side
parts, and replace any
defective parts.
Fuse is blown
Check for short circuits in the
rectier diodes and circuitry of
the secondary side rectifying
circuits, and replace any
defective parts.
After repairing, also replace the fuse.
Check for short circuits in
the power stabilizer unit's
regulator output terminal and
the ground, and replace any
defective parts.
1.2. Fuse is blown

Denon AVR-791 Specifications

General

Number of Channels	7.1
HDMI Inputs	4
HDMI Outputs	1
Audyssey Technologies	Audyssey MultEQ, Audyssey Dynamic Volume, Audyssey Dynamic EQ
4K Pass-Through	No
Signal-To-Noise Ratio	100 dB
HDMI Switching	Yes
Input Sensitivity	200 mV
THD	0.08%
Surround Sound Effects	Yes
Digital Sound Processor (DSP)	Yes
DSP Preset Qty	7
Tuner Bands	AM/FM
Preset Station Qty	56
Auto Preset Memory	Yes
HDMI Pass-Through	Yes
Frequency Response	10Hz-100kHz
Power Output	90 W per channel (8 ohms, 20Hz-20kHz, 0.08% THD)
Dolby Technologies	Dolby Digital Plus, Dolby TrueHD
DTS Technologies	DTS, DTS-HD Master Audio, DTS-HD High Resolution Audio, DTS Neo:6
Response Bandwidth	10 - 100000 Hz
Input Impedance	47 kΩ
Audio D/A Converter	24-bit / 192kHz
DSP Presets	Rock Arena, Jazz Club, Mono Movie, Matrix, Virtual, Game
Tuning Range	AM: 520 - 1710 kHz, FM: 87.5 - 108 MHz
Connector Type	HDMI
Amplifier Output Details	90W x 7 (8 ohms, 20Hz-20kHz, 0.08% THD)
Video Conversion	Yes (Composite to HDMI)