Sharp LC-19LS410UT, Service Manual

Page: 36 / 115

LC-19LS410UT, LC-22LS510UT
36
<External input Input1(Composite)>No picture on the display (3)
↓
Does not the picture of the composite video signal input to Input1(Composite) go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓ YES
↓ YES
<External input HDMI1>No picture on the display (4)
↓
Does not the picture of the HDMI signal input to Input5(HDMI1) go out?
MINI AV_UNIT:
↓
↓
YES
↓ YES
Is CVBS signal sent to pin (2) of AV3 (CN105) ?
NO
Check the setting of an external input device that connects of
CN105.
Refer to
“
The picture doesn't appear in all modes.
”
Is CVBS signal sent to pin (69) of IC U401?
NO
Check the line between IC U401 and CN105.
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN501) normal?
NO
Check the line between pin (35) of IC U409 and CN501.
Refer to
“
The picture doesn't appear in all modes.
”
Check the connection and setup with the external HDMI devices.
Is TMDS signal input into pin (8, 7)/RX2
±
, (6, 5)/RX1
±
, (4, 3)/RX0
±
,
(2, 1)/RXC
±
of IC U409?
Check the line between IC U409 and CN501.
NO