Denon AVR-X3500H Service Manual page 111

3-10. Error Code H1-16 failure detection procedure
Checking device. [U1007 : Sil9437]
Check the power supply voltage. (ARC IC)
Check item(3-10.1.). Check the power supply voltage. :
Does the power supply voltage of the ARC IC [U1007] indicate the correct voltage (1.21V)?
The test points are as follows.
HDMI Rx2
C2244
U1007
YES
Check item(3-10.2.).
Check the power components [U1032] and the pattern on the sub-
strate.
If there is no problem, remove the ARC IC [U1007] from the sub-
strate and measure the voltage at the test point of
10.1.).
Is the power supply voltage correct (1.2V)?
Replace with a new device.
Recheck from
If it does not work, replace the PCB.
NO
Check the power supply voltage. :
check item (3-
YES NO
The power supply circuit is
faulty.
Replace the PCB.
check item (3.1.)
Checking the reset waveform. (ARC IC)
Check item(3-10.3.). Checking the reset waveform :
Check the waveform.
Is the "RESET" waveform of the ARC IC [U1007] correct (like the
one shown in the diagram) when the power is turned on?
HDMI Rx2
C2247
U1007
YES
111
Examples of confirmation waveform
Voltage scale : 1.0V/div
Time scale : 20ms/div
NO
Check the reset circuit between
CPU [U1018] and ARC IC [U1007].
If there is no problem, the ARC IC
[U1007] is faulty.
Replace with a new device.
Recheck from check item (3.1.)
If it does not work, replace the
PCB.
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