Sharp LC-22LE320 Service Manual page 100

LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320
Does not the picture of the HDMI signal input to HDMI3 go out?
MINI AV_UNIT:
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN506) normal?
Are EDID data pin (6)(SCL) of IC U504 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), pin (16) of a HDMI terminal
(CN506)?
Is TMDS signal input into pin(48, 47)/RX3-2±,(45, 44)/RX3-1±, (42,
41)/RX3-0±, (39, 38)/RX3-C± of IC U501?
Is TMDS signal output from pin(17, 18)/ 2±,(20, 21)/ 1±, (23, 24)/ 0±,
(26, 27)/ C± of IC U501?
Refer to "The picture doesn't appear in all modes."
Does not the picture of the PC IN(ANALOG) video signal input to VGA(15pin-D-SUB terminal) go out?
TERMINAL_UNIT:
Is R/G/B/H/V signal sent to pin (1)/R, (2)/G, (3)/B, (14)/H, (13)/V of
VGA (CN101)?
MAIN_UNIT:
Is R/G/B/H/V signal sent to pin (AT25)/R, (AU24)/G, (AT23)/B,
(AR22)/H, (AU22)/V of IC U401?
Refer to "The picture doesn't appear in all modes."
↓
YES
YES
YES
↓
YES
<External input VGA>No picture on the display (9)
↓
↓
↓YES
↓YES
NO
Check the line between pin (35) of IC U501 and CN506.
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 U504?
↓NO
Check CN506, IC U504 and peripheral circuits.
NO
Check the line between IC U501 and CN506.
NO
Check IC U501 and peripheral circuits.
NO
Check the setting of an external input device that connects of
CN101.
NO
Check the line between IC U401 and CN101.
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