Denon AVR-791 Service Manual

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YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Check operation of each device.
(AMP source : BD / Video input of player : 480P / Connect the TV.)
Check operation of U1001.
Check operation of U1302.
Check operation of U1501.
(18) Check power supply.
Is 1.8V supplied to C1019/C1053/C1037/L1003?
Is 3.3V supplied to C1112/C9032/C1124/C1122?
(19) Check xtal oscillator.
Is there 28.6363MHz oscillation of X1001/X1002?
(23) Check xtal oscillator.
Is oscillation of X1301(27MHz) transmitted to U1302
(155pin/156pin)?
(20) Check RESET.
Is RESET waveform conrmed in U5500 (53pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
(24) Check RESET.
Is RESET waveform conrmed in U1301 (4pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
(27) Check RESET.
Is RESET waveform conrmed in U1501 (38pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
The pattern and circuit from the HDMI connector (K1510) to the
IC(U1510) is defective, or HDMI output circuitry is defective (U1510
and surrounding circuitry).
(21) Check output signal.
Is waveform conrmed in R1063 (IPINDE/IPINVSYNC/
IPINHSYNC/IPINPCK). (If not continued to " L", proceed to "YES".)
(25) Check output signal.
Is waveform conrmed in R1312(1TXDE/1TXVSYNC/1TXHSYNC),
R1309(1TXPCK). (If not continued to " L", proceed to "YES".)
(22) Check power supply.
Are 1.8V or 3.3V supplied to U1302 (each power supply pin)?
(26) Check power supply.
Are 1.8V or 3.3V supplied to U1501 (each power supply pin)?
The power supply circuitry is defective.
The X1001, X1002 or U1001 is defective.
The X1301 or U1302 is defective.
The RESET circuitry or U1001 is defective.
The RESET circuitry (U1301 and
surrounding circuitry) or U1302 is defective.
The RESET circuitry (Q1501 and
surrounding circuitry) or U1501 is defective.
The U1001 is defective.
The U1302 is defective.
The power supply circuitry is defective.
The power supply circuitry is defective.
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO

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)