Denon AVR-1912 Service Manual

71
Check operation of each device.
(AMP source : SAT[CVBS/COMPONENT],DOCK[S]
/ ANALOG Video input of player : [480i/Color bar signal]
/ Connect the TV.)
Check operation of U4(ADV7844).
(4) Check power supply.
Are 1.8V conrmed in the checkpoint of Detail F (74 page)?
Are 3.3V conrmed in the checkpoint of Detail F (74 page)?
The power supply circuitry is defective.
NO
No picture is output.
(1) Is the set's input set to ANALOG VIDEO input(CVBS/S/
COMPONENT)?
(3) Check the input signal
Is ANALOG VIDEO signal conrmed with the following point?
COMPONENT-Y : FB66
COMPONENT-Cb : FB64
COMPONENT-Cr : FB62
S-Y : FB68
S-C : FB70
V : FB68
Check set's input setting, referring to the
set's operating instructions.
NO
3.2. No picture is output (Analog to HDMI)
YES
YES
The set does not recognize the TV.
(2) Is TP [HP_TX] set to the "H"(3V-5V)?
With the TV connected,check the voltage of the IC on the side on
which the TV is connected.
Is communication waveform conrmed in TP[DDCTX_SCL/
DDCTX_SDA]?
Is D28/D29/D30/D31/D32/D33/D34/D35 terminated by the TMDS
signal of 3.3V and is the signal output?
The pattern and circuit from the HDMI
connector (JACK6) to the IC9 are defective,
or HDMI output circuitry is defective (IC9
and surrounding circuitry).
To item (26).
d
The ANALOG VIDEO circuit or FRONT
CONNECTOR BD is defective.
To troubleshooting 2. Analog video.
NO
NO
The input circuitry is defective.
(U4, IC9 or IC12 and surrounding circuitry)
YES
YES
(5) Check RESET.
Is RESET waveform conrmed in TP[ADV7844_RESET], when
the power is turned on? (If the waveform is not the reference
waveform, proceed to NO.)
The RESET circuitry (Q19 and surrounding
circuitry) or U4 is defective.
NO
YES
YES
(6) Check xtal oscillator.
Is oscillation of X1(28.6363MHz) transmitted?
The X1 or U4 is defective.
NO
YES
(7) 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.)
The pattern is defective of the HSCL/HSDA
line.
NO

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