Error Code H1-06 Failure Detection Procedure - Denon AVR-S950H Series Service Manual

3-4. Error Code H1-06 failure detection procedure

Checking device. [U1026 : ADV8003]
Check the power supply voltage.
Check item(3-4.1.). Check the power supply volt-
age. :
Does the power supply voltage of the GUI [U1026]
indicate the appropriate voltage (1.8V, 3.3V)?
The test points are as follows.
1.8V
3.3V
3.3V
C1574
U1026
YES
GUI [U1026] is faulty.
Replace with a new device.
Recheck from check item (3.1.).
If it does not work, replace the PCB.
NO Check item(3-4.2.). Check the power supply volt-
age. :
Check the power supply components [U1069,
U1077] on the substrate and peripheral pattern.
If there is no problem, remove the GUI [U1026]
from the substrate and measure the voltage at
the test point of check item (3-4.1.).
Is the voltage correct (1.8V or 3.3V)?
YES NO
The power supply circuit is faulty.
Replace the PCB.
Checking the reset waveform.
Check item(3-4.3.). Checking the reset :
Check the CPU.
Is the waveform of the TP near the GUI [U1026] correct (like the one
shown in the diagram) when the power is turned on?
RESET
U1026
YES NO
Check the reset circuit between CPU [U1018] and GUI [U1026].
If there is no problem, the GUI [U1026] is faulty.
Replace with a new device.
Recheck from check item (3.1.).
If it does not work, replace the PCB.
98
10ms
10ms
Example of the waveform to be checked
Voltage scale：1.0V/div
Time scale：20ms/div
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10ms