Denon DHT-391XP Service Manual page 36

(19) Check xtal oscillator.
Is there 28.6363MHz oscillation of X101?
(20) Check RESET.
Is RESET waveform confi rmed in IC11 (97pin), when power is
turned on? (If continued to "H" or " L", proceed to "NO".)
(21) Check control signal(I2C).
Is waveform confi rmed in IC11 78pin(SDATA)/79pin(SCL). (If not
continued to " L", proceed to "YES".)
HDMI output circuitry is defective (IC11 and surrounding circuitry).
YES
YES
YES
NO
The X101 or IC11 is defective.
NO
The RESET pattern or IC11 is defective.
NO
The SDATA/SCL line pattern is defective.
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