Check the power supply voltage. (HDMI Tx)
Check item(6).
Check the power supply voltage. :
Does the power supply voltage of the HDMI Tx [
U1039
] indicate the correct voltage (1.1V, 3.3V)?
The test points are as follows.
HDMI Tx
U1039
112 pin
38 pin
1.1V
3.3V
Check item(7).
Check the power supply voltage. :
Check the power components [
U1064/U1066
] and the pattern on
the substrate.
If there is no problem, remove the HDMI Switcher2 [
U1039
] from
the substrate and measure the voltage at the test point of
check
item (6)
.
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. [
U1039 : MN864788
]
3-1. Error Code H1-01 failure detection procedure
NO
YES
NO
YES
Go to next page.
YES
Checking the reset waveform. (HDMI Tx)
Check item(8).
Checking the reset waveform :
Check the CPU.
Is the "
RESET
" waveform of the TP near the HDMI Tx [
U1039
]
correct (like the one shown in the diagram) when the power is
turned on?
HDMI Tx
U1039
RESET
Check the reset circuit between
CPU [
U1018
] and HDMI Tx
[
U1039
].
If there is no problem, the HDMI
Tx [
U1039
] 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
92