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.
U2800
1.8V
3.3V
L2802
L2815
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)?
Check the power supply voltage.
Checking device. [
U2800 : ADV8003
]
Go to next page.
3-4. Error Code H1-06 failure detection procedure
NO
GUI [
U2800
] is faulty.
Replace with a new device.
Recheck from
check item (3.1.)
If it does not work, replace the PCB.
The power supply circuit is faulty.
Replace the PCB.
NO
YES
YES
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?
U2800
RESET
Checking the reset waveform.
10ms
10ms
10ms
Example of the waveform to be checked
Voltage scale : 1.0V/div
Time scale : 20ms/div
Recheck from
check item (3.1.)
If it does not work, replace the PCB.
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.
NO
YES
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
106
