Denon AVR-1912E3 User 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-1912E3 Specifications

General

Brand	Denon
Model	AVR-1912E3
Category	Receiver
Language	English