Sharp LC-37XD1E, Service Manual

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LC-37XD1E/RU
4 – 19
<When EXT6 is used for external input> No picture on the display (8)
No EXT6 (HDMI) output of the external input system.
Checklist:
1) Is "INPUT SOURCE" button on tne remote control set up correctly? ... See the operation manual and set "INPUT SOURCE" to "EXT6".
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?
NO
Select "EXT6" with button on the remote control.
YES
Is the type of video signal (Signal Type) from HDMI- con-
nected extennal device set?
NO From MENU-Connections-HDMI setup-EXT6-Signal type, select a
signal type
("RGB", "YCbCr 4:4:4" or "YCbCr 4:2:2")
YES
Is the type of color signal (Color matrix) from HDMl -connected
external device set? NO From MENU-Connections-HDMI setup-EXT6-Color Matrix, select a
color signal type ( "ITU601" or "ITU709")
YES
Is TMDS signal (RX*
±
signal) sent to pins (1) - (12) of EXT6
(HDMI) termina (SC1902)?
NO Is I2C signal (SDA/SCL signal)sent to pins (16) and (15) of EXT6
(HDMI) terminal? Check external connection and peripheral cir-
cuits.
YES
Is 8bit-DIGITAL signal (HDMI- R/G/B) sent from pins (110)-
(144) of IC1905 (HDMI-RECEIVER)? NO Check power supply (3.3/1.8V) pins (99) and (74) of IC1905,
SDA/SCL signal pins (29) and (30), and peripheral circuits.
YES
Is 8bit-DIGITAL signal (HDMI- R/G/B) sent to pins (B10) -
(D15) of IC3002 (V-PRO.)? NO Check SDA3/SCL3 signal pins (27) and (28), interface between
IC1905 and lC3002, and peripheral circuits.
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)?
NO 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.
YES
2