Sharp LC-37XD1E Service Manual page 50

LC-37XD1E/RU
<When EXT6 is used for external input>
No EXT6 (HDMI) output of the external input system.
Checklist:
1) Is "INPUT SOURCE" button
2) Have you checked the type video signal sent from HDMI-connected external device? ...Confirm the type (it should "RGB", "YCbCr 4:4:4" or
"YCbCr 4:2:2").
3) Have you checked the type of Color matrix sent from HDMI-connected external device? ... Confirm the type (it should be "ITU601" or
"ITU709".)
4) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manuall
Is "EXT6" selected with button on the remote control?
YES
Is the type of video signal (Signal Type) from HDMI- con-
nected extennal device set?
YES
Is the type of color signal (Color matrix) from HDMl -connected
external device set?
YES
Is TMDS signal (RX*±signal) sent to pins (1) - (12) of EXT6
(HDMI) termina (SC1902)?
YES
Is 8bit-DIGITAL signal (HDMI- R/G/B) sent from pins (110)-
(144) of IC1905 (HDMI-RECEIVER)?
YES
Is 8bit-DIGITAL signal (HDMI- R/G/B) sent to pins (B10) -
(D15) of IC3002 (V-PRO.)?
YES
Is LVDS video signal (TA1± - TD1±) sent to pins (AB8)/(AC8) -
(AB3)/(AC3) of IC3002 (V-PRO.), and is CLK signal (CK1±)
sent to pins (AB5)/(AC5)?
Is LVDS video signal (TA2± - TD2±) sent to pins (AC2)/(AC1) -
(V2)/(V1) of IC3002 (V-PRO.), and is CLK signal (CK2±) sent
to pins (Y2)/(Y1)?
YES
2
No picture on the display (8)
on tne remote control set up correctly? ... See the operation manual and set "INPUT SOURCE" to "EXT6".
NO
NO
NO
NO
NO
NO
NO
4 – 19
Select "EXT6" with button on the remote control.
From MENU-Connections-HDMI setup-EXT6-Signal type, select a
signal type
("RGB", "YCbCr 4:4:4" or "YCbCr 4:2:2")
From MENU-Connections-HDMI setup-EXT6-Color Matrix, select a
color signal type ( "ITU601" or "ITU709")
Is I2C signal (SDA/SCL signal)sent to pins (16) and (15) of EXT6
(HDMI) terminal? Check external connection and peripheral cir-
cuits.
Check power supply (3.3/1.8V) pins (99) and (74) of IC1905,
SDA/SCL signal pins (29) and (30), and peripheral circuits.
Check SDA3/SCL3 signal pins (27) and (28), interface between
IC1905 and lC3002, and peripheral circuits.
Check pins (G14)/(U10) of BU3.3V line of IC3002 (V-PRO.), pins
(G10)/(N17) of BU2.5V line,pins (U16)/(G12) of BU1.8V line and
peripheral circuits.