3-7. Error Code H1-05 failure detection procedure
Checking device. [
U2001 : ADV7180
]
Checking the reset waveform. (VIDEO DECODER)
Check item(3-7.1.).
Checking the reset waveform :
Check the waveform.
Is the TP waveform of the TP near the VIDEO DECODER (
U2001
)
correct (like the one shown in the diagram) when the power is
turned on?
VIDEO DECODER
U2001
RESET
Check the reset circuit between
CPU [
U6201
] and VIDEO DECODER
[
U2001
].
If there is no problem, the VIDEO
DECODER [
U2001
] is faulty.
Replace with a new device.
Recheck from
check item (3-7.1.)
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 [
R2031
] with a new resis-
tor.
If there is still a problem, the VIDEO DECODER [
U2001
] 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
109
