Sharp LC-32LD164E Service Manual page 50

LC-32LD164
LC-32LD165
LC-32LD166
LC-50LD264–LC-50LD265–LC-50LD265RU–LC-50LD266
Does not the picture of the composite video signal input to AV(Composite) go out?
TERMINAL UNIT:
Is COMP_Y signal sent to pin (2) of AV (CN116) ?
MAIN_UNIT:
Is COMP_Y signal sent to pin (V13) of IC U401?
Refer to "The picture doesn't appear in all modes."
Does not the picture of the HDMI signal input to HDMI1 go out?
MINI AV_UNIT:
Is the HDMI_0M_HPD detection function of pin (19) of a HDMI1
terminal (CN501) normal?
Are EDID data pin (U7) (SCL) of IC U401, pin (V6) (SDA) accessed,
and is it read from pin (15), pin (16) of a HDMI terminal (CN501)?
Is TMDS signal input into pin ((Y9,W9)/( RX_0_2, RX_0_2B),
(V9,U9)/( RX_0_1, RX_0_1B),(V8,V7)/( RX_0_0, RX_0_0B),
(Y7,W7)/( RX_0_C, RX_0_CB)) of IC U401?
Refer to "The picture doesn't appear in all modes."
Does not the picture of the HDMI signal input to HDMI2 go out?
MINI AV_UNIT:
Is the HDMI_2M_HPD detection function of pin (19) of a HDMI1
terminal (CN502) normal?
Are EDID data pin (J17) (SCL) of IC U401, pin (J14) (SDA) accessed,
and is it read from pin (15), pin (16) of a HDMI terminal (CN502)?
Is TMDS signal input into pin ((J19,J20)/( RX_2_2, RX_2_2B),
(K19,K20)/( RX_2_1, RX_2_1B),(K18,L18)/( RX_2_0, RX_2_0B),
(M17,M18)/( RX_2_C, RX_2_CB)) of IC U401?
Refer to "The picture doesn't appear in all modes."
<External input AV (Composite)>No picture on the display (4)
↓
↓
↓YES
↓YES
<External input HDMI1 >No picture on the display (5)
↓
↓
↓YES
↓YES
↓YES
<External input HDM2 >No picture on the display (6)
↓
↓
↓YES
↓YES
↓YES
NO
Check the setting of an external input device that connects of
CN116.
NO
Check the line between IC U401 and CN116.
NO
Check the line between pin (W5) of IC U401 and CN501.
NO Is access possible in the re-writing or exchange of EDID data of
IC U401?
NO
Check the line between IC U401 and CN501.
NO
Check the line between pin (J16) of IC U401 and CN502.
NO Is access possible in the re-writing or exchange of EDID data of
IC U401?
NO
Check the line between IC U401 and CN502.
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