Denon AVR-1912

72
YES
YES
YES
YES
Check operation of IC12(ADV7511)
Check operation of IC9(ADV7623)
(10) Check RESET.
Is RESET waveform conrmed in IC12 (38pin), when the power
is turned on? (If the waveform is not the reference waveform,
proceed to NO.)
(14) Check RESET.
Is RESET waveform conrmed in IC9 (97pin), when the power
is turned on? (If the waveform is not the reference waveform,
proceed to NO.)
(9) Check power supply.
Are 1.8V or 3.3V supplied to IC12(each power supply pin)?
(12) Check power supply.
Are 1.8V or 3.3V supplied to IC9(each power supply pin)?
The power supply circuitry is defective.
The power supply circuitry is defective.
The RESET circuitry (Q22 and surrounding
circuitry) or IC12 is defective.
The RESET circuitry (Q18 and surrounding
circuitry) or IC9 is defective.
NO
NO
NO
NO
YES
(11) Check output signal.
Is TMDS waveform conrmed at IC9(112pin/113pin/115pin/116pi
n/118pin/119pin/121pin/122pin).
(If the waveform is not the reference waveform, proceed to NO.)
The IC12 is defective.
NO
(13) Check xtal oscillator.
Is oscillation of XTAL1(28.6363MHz) transmitted?
The XTAL1 or IC9 is defective.
NO
YES
The pattern and circuit from the HDMI connector (JACK6) to the
IC(IC9) are defective, or HDMI output circuitry is defective (IC9 and
surrounding circuitry).
(8) Check the input signal
Is each waveform conrmed with the following terminal of IC12?
2pin : 1TXVSYNC
79pin : 1TXPCK
97pin : 1TXDE
98pin : 1TXHSYNC
(If the waveform is not the reference waveform, proceed to NO.)
YES
The U4 is defective.
NO