Sharp LC-19LE430E, Service Manual

Page: 59 / 206

2008-03-14
LC-19LE430E/UK, LC-22LE430E/UK, LC-26LE430E/UK, LC-32LE430E/UK
59
<External input HDMI2>No picture on the display (9)
↓
Does not the picture of the HDMI signal input to HDMI2 go out?
MINI AV_UNIT:
↓
↓
YES
↓ NO
YES
↓ YES
↓ YES
<External input VGA>No picture on the display (10)
↓ ↓
Does not the picture of the PC IN (ANALOG) video signal input to VGA (15pin-D-SUB terminal) go out?
TERMINAL_UNIT:
↓
MAIN_UNIT:
↓ YES
↓ YES
Is R/G/B/H/V signal sent to pin (1)/R, (2)/G, (3)/B, (14)/H, (13)/V of
VGA (CN101)?
NO
Check the setting of an external input device that connects of
CN101.
Refer to
“
The picture doesn't appear in all modes.
”
Is R/G/B/H/V signal sent to pin (156)/R, (154)/G, (152)/B, (151)/H,
(150)/V of IC U401? NO
Check the line between IC U401 and CN101.
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN506) normal?
NO
Check the line between pin (35) of IC U501 and CN506.
Is TMDS signal output from pin(17, 18)/ 2
±
,(20, 21)/ 1
±
, (23, 24)/ 0
±
,
(26, 27)/_C
±
of IC U501?
Check the connection and setup with the external HDMI devices.
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)?
NO
Is access possible in the re-writing or exchange of EDID data of
IC U504?
Check CN506, IC U504 and peripheral circuits.
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?
Check the line between IC U501 and CN506.
NO
Refer to
“
The picture doesn't appear in all modes.
”
Check IC U501 and peripheral circuits. NO