Denon AVR-X3300W Service Manual page 95

Checking the reset waveform. (HDMI Switcher2)
Check item(29). Checking the reset waveform :
Check the waveform.
Is the "RESET" waveform of the TP near the HDMI Switcher2
(U1000) correct (like the one shown in the diagram) when the
power is turned on?
RESET
U1000
YES
Replace (R1061/R1062) with new resistors and check the I2C
communication again.
Check item (26) If the result is not OK, the HDMI Switcher2
(U1000) is faulty.
Replace with a new device.
Recheck from check item (4).
If it does not work, replace the PCB.
Examples of confirmation waveform
NO
Check the reset circuit between
CPU (U1018) and HDMI Switcher2
(U1000).
If there is no problem, the HDMI
Switcher2 (U1000) is faulty.
Replace with a new device.
Recheck from check item (4).
If it does not work, replace the
PCB.
95