3-3. Error Code H1-03 failure detection procedure
Check the power supply voltage. (HDMI Rx)
Check item(16).
Check the power supply voltage. :
Does the power supply voltage of the HDMI Rx2 [
U1003
] indicate the correct voltage (1.1V, 3.3V)?
The test points are as follows.
HDMI Rx2
U1003
112 pin
38 pin
1.1V
3.3V
Check item(17).
Check the power supply voltage. :
Check the power components [
U1065
] and the pattern on the sub-
strate.
If there is no problem, remove the HDMI Rx [
U1003
] from the sub-
strate and measure the voltage at the test point of
check item (16)
.
Is the voltage correct (1.1V or 3.3V)?
Replace with a new device.
The power supply circuit is
faulty.
Replace the PCB.
Recheck from
check item (1).
If it does not work, replace the PCB.
Checking device. [
U1003 : MN864788
]
NO
YES
NO
YES
Go to next page.
YES
Checking the reset waveform. (HDMI Rx)
Check item(18).
Checking the reset waveform :
Check the waveform.
Is the "
RESET
" waveform of the TP near the HDMI Rx [
U1003
]
correct (like the one shown in the diagram) when the power is
turned on?
HDMI Rx2
U1003
RESET
Check the reset circuit between
CPU [
U1018
] and HDMI Rx
[
U1003
].
If there is no problem, the HDMI
Rx [
U1003
] is faulty.
Replace with a new device.
Recheck from
check item (1).
If it does not work, replace the
PCB.
NO
Examples of confirmation waveform
Voltage scale：1.0V/div
Time scale：20ms/div
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
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