Error Code H1-06 Failure Detection Procedure - Denon AVR-X6400H Service Manual

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

Checking device. [U2800 : ADV8003]
Check the power supply voltage.
Check item(17). Check the power supply voltage.
:
Does the power supply voltage of the GUI [U2800]
indicate the appropriate voltage (1.8V, 3.3V)?
The test points are as follows.
1.8V
3.3V
U2800
L2802 L2815
YES
The GUI [U2800] is faulty.
Replace with a new device.
Recheck from check item (1).
If it does not work, replace the PCB.
NO Check item(18). Check the power supply voltage.
:
Check the power supply components (U3603,
Q3696) on the substrate and peripheral pattern.
If there is no problem, remove the GUI [U2800]
from the substrate and measure the voltage at
the test point of check item (17).
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(19). Checking the reset :
Check the CPU.
Is the waveform of the TP near the GUI (U2800) correct (like the one
shown in the diagram) when the power is turned on?
RESET
U2800
YES NO
Check the reset circuit between CPU [U6201] and GUI [U2800].
If there is no problem, the GUI [U2800] is faulty.
Replace with a new device.
Recheck from check item (1).
If it does not work, replace the PCB.
105
10ms
10ms
Example of the waveform to be checked
Voltage scale : 1.0V/div
Time scale : 20ms/div
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10ms