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3-4. Error Code H1-06 failure detection procedure
Checking device.
[U2800 :
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 [U2800]
indicate the appropriate voltage (1.8V, 3.3V)?
The test points are as follows.
1.8V
3.3V
U2800
L2802
L2815
YES
GUI [U2800] 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
[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
(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 [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 (3.1.)
If it does not work, replace the PCB.
106
10ms
10ms
Example of the waveform to be checked
Voltage scale : 1.0V/div
Time scale : 20ms/div
Go to next page.
10ms
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