Sharp AQUOS LC-42LE40E, Service Manual

Page: 47 / 157

LC-32LE40E-LC-42LE40E
47
<External input (Component)>No picture on the display (6)
↓
Does not the picture of the component video signal input to Component go out?
TERMINAL_UNIT:
↓
MAIN_UNIT:
↓ YES
↓ YES
<External input AV (Composite)>No picture on the display (7)
↓
Does not the picture of the composite video signal input to AV(Composite) go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓ YES
↓ YES
<External input HDMI1 >No picture on the display (8)
↓
Does not the picture of the HDMI signal input to HDMI1 go out?
MINI AV_UNIT:
↓
↓ NO
YES
↓ YES
↓ YES
↓ YES
Is CVBS signal sent to pin (2) of AV (CN136) ?
NO
Check the setting of an external input device that connects of
CN136.
Refer to “ The picture doesn't appear in all modes. ”
Is CVBS signal sent to pin (181) of IC U401?
NO
Check the line between IC U401 and CN136.
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN502) normal?
NO
Check the line between pin (50) of IC U501 and CN502.
Refer to “ The picture doesn't appear in all modes. ”
Check the connection and setup with the external HDMI devices.
Are EDID data pin (6) (SCL) of IC U503 (EEPROM), pin (5) (SDA)
accessed, and is it read from pin (15), pin (16) of a HDMI terminal
(CN502)?
Is access possible in the re-writing or exchange of EDID data of
IC U503?
NO
Is TMDS signal input into pin(63, 62)/RX2-2 ± ,(60, 59)/RX2-1 ± , (57,
56)/RX2-0 ± , (54, 53)/RX2-C ± of IC U501?
Check the line between IC U501 and CN502.
NO
NO Is Component Y/Pb/Pr signal sent to pin (2)/Y, (4)/Pb, (6)/Pr of
AV1(CN111) ? Check the setting of an external input device that connects of
CN111.
Is Component Y/Pb/Pr signal sent to pin (163/165/166) of IC U401?
NO
Check the line between IC U401 and CN111
Refer to
“
The picture doesn't appear in all modes.
”
Is TMDS signal output from pin(17, 18)/ 2
±
,(20, 21)/ 1
±
, (23, 24)/ 0
±
,
(26, 27)/_C ± of IC U501?
NO
Check IC U501 and peripheral circuits.