Read LG 32LH1DC1 Service Manual online
-45-
12. HDMI(DVI) signal flow chart
*HDMI(DVI) Video signal flowchart
HDMI(DVI)
Signal Input
LCD Panel
TMDS Signal
I
2
C Comm.
LVDS Signal
P505
HDMI Connector
IC504
NVRAM
(HDMI EDID)
IC401
DTV Controller
P503
LVDS Connector
HDMI transmitter reads the HDCP certification and EDID information when connected to the HDMI connector (P505).
At this time, if the HDCP certification fails or if the EDID information cannot be read, the HDMI transmitter does not
send out the video and audio signal.
When HDCP certification is successfully done, the signal sent by the transmitter that could not read the
EDID information is decoded by the DTV controller(IC401) and converted to LVDS signal to be sent to the
LCD panel through the LVDS connector.
The DVI transmitter only outputs the video signal after HDCP certification and reading the EDID information.
(For DVI transmitter, the PC generally outputs the video signal after HDCP certification and reading
At this time, if the HDCP certification fails or if the EDID information cannot be read, the HDMI transmitter does not
send out the video and audio signal.
When HDCP certification is successfully done, the signal sent by the transmitter that could not read the
EDID information is decoded by the DTV controller(IC401) and converted to LVDS signal to be sent to the
LCD panel through the LVDS connector.
The DVI transmitter only outputs the video signal after HDCP certification and reading the EDID information.
(For DVI transmitter, the PC generally outputs the video signal after HDCP certification and reading
the EDID information, but if the Set Top Box is the DVI transmitter, sometimes it outputs only the video signal
unconditionally in set resolution.)
unconditionally in set resolution.)
The signal received through IC401 is shown in the display through the same process as above.
Click on the first or last page to see other 32LH1DC1 service manuals if exist.