Check the power supply voltage. (HDMI SW2)
Check item(3-3.1.).
Check the power supply voltage. :
Does the power supply voltage of the HDMI SW2 [
U2601
] indicate the correct voltage (1.1V)?
The test points are as follows.
HDMI SW2
U2601
112 pin
Check item(3-3.2.).
Check the power supply voltage. :
Check the power components [
U3605/U3601
] and the pattern on
the substrate.
If there is no problem, remove the HDMI SW2 [
U2601
] from the
substrate 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. [
U2601 : MN864788
]
3-3. Error Code H1-03 failure detection procedure
NO
YES
NO
YES
Checking the reset waveform. (HDMI SW2)
Check item(3-3.3.).
Checking the reset waveform :
Check the waveform.
Is the waveform of the TP near the HDMI SW2 [
U2601
] correct (like
the one shown in the diagram) when the power is turned on?
HDMI SW2
U2601
RESET
Check the reset circuit between
CPU [
U6201
] and HDMI SW2
[
U2601
].
If there is no problem, the HDMI
SW2 [
U2601
] is faulty.
Replace with a new device.
Recheck from
check item (3-3.3.)
If it does not work, replace the
PCB.
NO
Examples of confirmation waveform
Voltage scale : 1.0V/div
Time scale : 20ms/div
check item (3.1.)
again after replacing [
R2630/R2631
] with a new
resistor.
If there is still a problem, the HDMI SW2 [
U2601
] is faulty.
Replace with a new device.
Recheck from
check item (3.1.)
If it does not work, replace the PCB.
YES
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
105
