Sharp LC-19S7E-BK, Service Manual

Page: 35 / 193

2008-03-14
LC-19S7E-BK LC-26S7E-BK LC-32S7E-BK
35
<External input HDMI1>No picture on the display (6)
↓
Does not the picture of the HDMI signal input to HDMI1 go out?
MINI AV_UNIT:
↓
↓
YES
↓ NO
YES
↓ YES
↓ YES
<External input VGA>No picture on the display (9)
↓
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
<External input AV1(Component)>No picture on the display (10)
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN1501) normal?
NO
Check the line between pin 50 of IC U1503 and CN1501.
Refer to “ The picture doesn't appear in all modes. ”
Check the connection and setup with the external HDMI devices.
Are EDID data pin (6)(SCL) of IC U1501 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), pin (16) of a HDMI
terminal(CN1501)?
NO
Is access possible in the re-writing or exchange of EDID data of
IC U1501?
Check CN1501, IC U1501 and peripheral circuits.
Is TMDS signal input into pin(RX_B2+, RX_B2-)/D2
±
_2,(RX_B1+,
RX_B1-)/D1
±
_2, (RX_B0+, RX_B0-)/D0
±
_2, (RX_BC+, RX_BC-
)/CLK
±
2 of IC U1503?
Check the line between IC U1503 and CN1501.
NO
Is R/G/B/H/V signal sent to pin (1)/R, (2)/G, (3)/B, (14)/H, (13)/V of
VGA (CN1401)?
NO
Check the setting of an external input device that connects of
CN1401.
Refer to “ The picture doesn't appear in all modes. ”
Is R/G/B/H/V signal sent to pin (11)/RIN1, (10)/GIN1, (8)/BIN1,
(3)/HSYNC1, (4)/VSYNC1 of IC U4201?
NO
Check the line between IC U4201 and CN1401.
Is TMDS signal input into pin(RX_BC2N, RX_BC2P)/D2
±
_2,(RX_B1N, RX_B1P)/D1
±
_2, (RX_B0N, RX_B0P)/D0
±
_2,
(RX_BCKN, RX_BCKP)/CLK
±
_2 of IC U4201?
Check the line between IC U1503 and IC U4201.
NO