Sharp LC-42SV32B Service Manual page 36

LC-42SV32B
Does not the picture of the composite video signal input to AV(Composite) go out?
TERMINAL UNIT:
Is CVBS signal sent to pin (2) of AV (CN128) ?
MAIN_UNIT:
Is CVBS signal sent to pin (A17) 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 HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN502) normal?
Is TMDS signal input into pin ((41,42)/( RR1X0), (44,45)/( RR1X1),
(47,48)/( RR1X2), (38,39)/( RR1XC)) of IC U501?
Is TMDS signal output from pin ((1/2/4/5/7/8/10/11)/(M_RX1) of IC
U501?
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 HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN503) normal?
Is TMDS signal input into pin ((21,22)/(RR0X0), (24,25)/(RR0X1),
(27,28)/(RR0X2), (18,19)/(RR0XC)) of IC U501?
Is TMDS signal output from pin ((1/2/4/5/7/8/10/11)/(M_RX1) of IC
U501?
Refer to "The picture doesn't appear in all modes."
<External input AV (Composite)>No picture on the display (5)
↓
↓
↓YES
↓YES
<External input HDMI1 >No picture on the display (6)
↓
↓
YES
↓YES
↓YES
<External input HDM2 >No picture on the display (7)
↓
↓
YES
↓YES
↓YES
NO
Check the setting of an external input device that connects of
CN128.
NO
Check the line between IC U401 and CN128.
NO
Check the line between pin (36) of IC U505 and CN502.
Check the connection and setup with the external HDMI devices.
NO
Check the line between IC U501 and CN502.
NO
Check IC U501 and peripheral circuits.
NO
Check the line between pin (16) of IC U505 and CN503.
Check the connection and setup with the external HDMI devices.
NO
Check the line between IC U501 and CN503.
NO
Check IC U501 and peripheral circuits.
36
↓NO
↓NO