Marantz NR1509 Service Manual page 87

3-3. Error Code H1-07 failure detection procedure
Checking device. (OSD)
Check the power supply voltage.
Check item(12). Check the power supply voltage.
:
Does the power supply voltage of the OSD
[U1030] indicate the appropriate voltage (1.8V,
3.3V)?
The test points are as follows.
6 pin
U1030
93 pin
1.8V
3.3V
YES
HDMI OSD [U1030] is faulty.
Replace with a new device.
Recheck from check item (1).
If it does not work, replace the PCB.
NO Check item(13). Check the power supply voltage.
:
Check the power supply components [U1067,
Q1077, U1069] on the substrate and peripheral
pattern.
If there is no problem, remove the OSD [U1030]
from the substrate and measure the voltage at
the test point of check item (12).
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(14). Checking the reset :
Check the CPU.
When the power is turned on, is the TP waveform correct (as shown
in the figure)?
U1030
97 pin
YES NO
Check the reset circuit between CPU [U1013] and HDMI OSD[U1030].
If there is no problem, the HDMI OSD [U1030] is faulty.
Replace with a new device.
Recheck from check item (1).
If it does not work, replace the PCB.
87
Examples of confirmation waveform
Voltage scale：1.0V/div
Time scale：20ms/div
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