3-3. Error Code H1-03 failure detection procedure
Check the power supply voltage. (HDMI Rx)
Check item(3-3.1.). 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
112pin
38pin
1.1V
3.3V
Check item(3-3.2.). 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 (3-
3.1.).
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 (3.1.).
If it does not work, replace the PCB.
Checking device. [U1003 : MN864788]
NOYES
NOYES
Go to next page.
YES
Checking the reset waveform. (HDMI Rx)
Check item(3-3.3.). 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 (3.1.).
If it does not work, replace the
PCB.
NO
Examples of conrmation waveform
Voltage scale：1.0V/div
Time scale：20ms/div
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Electrical Mechanical Repair Information Updating
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