Sharp LC-42SB45U Service Manual page 38

LC-42SB45U
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
(CN702) normal?
YES
Are EDID data pin (6)(SCL) of IC U708 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), pin (16) of a HDMI
terminal(CN702)?
YES
Is TMDS signal input into pin (AF7, AE7)/RX2±, (AF6, AE6)/RX1±,
(AF5, AE5)/RX0±, (AF4, AE4)/RXC± of IC U400?
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
(CN700) normal?
YES
Are EDID data pin (6)(SCL) of IC U701 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), (16) of a HDMI
terminal(CN700)?
YES
Is TMDS signal input into pin (AF11, AE11)/RX2±, (AF10,
AE10)/RX1±, (AF9, AE9)/RX0±, (AF8, AE8)/RXC± of IC U400?
Refer to "The picture doesn't appear in all modes."
Does not the picture of the HDMI signal input to HDMI3 go out?
↓YES
<External input HDMI1 input 4 >No picture on the display (7)
↓
↓
↓YES
<External input HDMI2 input 5 >No picture on the display (8)
↓
↓
↓YES
<External input HDMI3 input 6 >No picture on the display (9)
↓
NO
Check the line between pin (AE1) of IC U400 and CN702.
Check the connection and setup with the external HDMI devices.
NO
Is access possible in the re-writing or exchange of EDID data of
IC U708?
Check CN702, IC U708 and peripheral circuits.
NO Check the line between IC U400 and CN702.
NO
Check the line between pin (B20) of IC U400 and CN700.
Check the connection and setup with the external HDMI devices.
NO
Is access possible in the re-writing or exchange of EDID data of
IC U701?
Check CN700, IC U701 and peripheral circuits.
NO
Check the line between IC U400 and CN700.
38
↓
↓NO
↓
↓NO