Advertisement
When the results of check item (3-16.11.) are "01"
(Detection of HPD is OK / Detection of RXSENSE is not OK )
Check the RXSENSE. (OUT2)
Check item(3-16.15.).
Checking the RXSENSE :
Does the test point of RXSENSE close to the HDMI output terminal
[N3401] indicate the (3.3V)?
N3401
HDMI OUT
[MONITOR2]
YES
NO
Check for a short circuit in the TMDS line.
If there is no problem, the HDMI Tx [U3401] is faulty.
Replace with a new device.
HDMI Tx [U3401] is faulty.
Replace with a new device.
Recheck from
check item (3.4.)
If it does not work, replace the PCB.
When the results of check item (3-16.11.) are "02"
(Detection of HPD is not OK / Detection of RXSENSE is OK )
Check the HPD. (OUT2)
Check item(3-16.16.).
Checking the HPD :
Does the voltage of HPD test point close to the HDMI output terminal
[N3401] indicate "Hi" (3-5 V)?
N3401
HDMI OUT
[MONITOR2]
HPD
YES
NO
Check for a short circuit in the HPD line.
If there is no problem, the HDMI Tx [U3401] is faulty.
Replace with a new device.
HDMI Tx [U3401] is faulty.
Replace with a new device.
Recheck from
check item (3.4.)
If it does not work, replace the PCB.
134
Advertisement
