Denon AVR-1912 Service Manual

70
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 U1(ADV3002).
Check operation of IC9(ADV7623)
(20) Check power supply.
Are 5V or 3.3V supplied to U1 (each power supply pin)?
Refer to [Detail C] of the substrate for test point.
(21) Check RESET.
Is RESET waveform conrmed in U1 (36pin), when the power is turned on?(If
the waveform is not the reference waveform, proceed to NO.)
(25) Check xtal oscillator.
Is oscillation of XTAL1(28.6363MHz) transmitted?
(23) Check output signal.
Is TMDS waveform conrmed in 25pin/26pin/28pin/29pin/31pin/32pin/34pin/35pin.
Is communication waveform of DDC_SCL/DDC_SDA conrmed in
67pin/68pin? (If the waveform is not the reference waveform, proceed to NO.)
(22) Check Control signal (I2C).
Is waveform conrmed in TP[HSCL/HSDA], when the power is turned on? (If
the waveform is not the reference waveform, proceed to NO.)
(26) Check RESET.
Is RESET waveform conrmed in IC9 (97pin), when the power is turned on? (If
not reference waveform, proceed to "NO".)
The pattern and circuit from the HDMI connector (JACK6) to the IC(IC9) is
defective, or HDMI output circuitry is defective (IC9 and surrounding circuitry).
Replace the IC9.
(24) Check power supply.
Are 1.8V or 3.3V supplied to IC9(each power supply pin)?
Refer to [Detail D] of the substrate for test point.
The power supply circuitry is defective.
The power supply circuitry is defective.
The RESET circuitry (Q7 and surrounding
circuitry) or U1 is defective.
The XTAL1 or IC9 is defective.
Replace the new parts.
The U1 is defective.
The pattern is defective of the HSCL/HSDA
line.
The RESET circuitry (Q18 and surrounding
circuitry) or IC9 is defective.
Replace the new parts.
NO
NO
NO
NO
NO
NO
NO
(*1) Abnormal sample of HDMI connector : The internal terminal has bent.

Denon AVR-1912 Specifications

General

Impedance	47 Ω
Receiver type	Surround
Frequency range	10 - 100000 Hz
Input sensitivity	200 mV
Audio output channels	7.1 channels
Audio A/D Converter (ADC)	24-bit/96kHz
Signal-to-Noise Ratio (SNR)	100 dB
Total Harmonic Distortion (THD)	0.08 %
Power output per channel (1KHz@6 Ohm)	125 W
Power output per channel (20-20KHz@8 Ohm)	90 W
HDMI in	6
Composite video in	3
Component video (YPbPr/YCbCr) in	1
Headphone connectivity	6.3 mm
Connectivity technology	Wired
Speakers connectivity type	Banana connector/Binding posts
Audio formats supported	AAC, FLAC, MP3, WAV, WMA
Image formats supported	JPG
Wi-Fi	No
Ethernet LAN	Yes
AM band range	520 - 1710 kHz
FM band range	87.5 - 107.9 MHz
Supported radio bands	AM, FM
Preset stations quantity	56
Supported video modes	1080i, 1080p, 480i, 480p, 576i, 576p, 720p
Analog signal format system	NTSC, PAL
Display	-
Product color	Black
Audio decoders	Dolby Digital EX, Dolby Digital Plus, Dolby Pro Logic II, Dolby Pro Logic IIx, Dolby Pro Logic IIz, Dolby TrueHD, DTS 96/24, DTS Neo:6, DTS-ES, DTS-ES (Discrete 6.1), DTS-ES (Matrix 6.1), DTS-HD
Apple docking compatibility	iPhone, iPod
AC input voltage	120 V
AC input frequency	60 Hz
Power consumption (standby)	0.1 W
Power consumption (typical)	460 W

Weight and Dimensions

Depth	382 mm
Width	435 mm
Height	167 mm
Weight	10200 g