Read Sharp LC-42XD1E (serv.man5) Service Manual online
LC-42XD1E/RU
4 – 17
<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 the 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 manual.
4) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.
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- connected
external device set?
external 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”)
signal type (“RGB”, “YCbCr 4:4:4” or “YCbCr 4:2:2”)
YES
Is the type of color signal (Color matrix) from HDMI -connected
external device set?
external device set?
NO
From MENU-Connections-HDMI setup-EXT6-Color Matrix, select a
color signal type (“ITU601” or “ITU709”)
color signal type (“ITU601” or “ITU709”)
YES
Is TMDS signal (RX*
±signal) sent to pins (1) - (12) of EXT6
(HDMI) terminal (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.
(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)?
(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.
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.)?
of IC3002 (V-PRO.)?
NO
Check SDA3/SCL3 signal pins (27) and (28), interface between
IC1905 and lC3002, and peripheral circuits.
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
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.
(G10)/(N17) of BU2.5V line, pins (U16)/(G12) of BU1.8V line and
peripheral circuits.
YES
Is LVDS video signal (TA1
± - TD1±) sent to pins (3)/(2) -(12)/(11) of CONNECTOR CN1 of LCD-
CONT-UNIT, and is CLK signal (CK1
±) sent to pins (10)/(9)?
Is LVDS video signal (TA2
± - TD2±) sent to pins (17)/(16) -(26)/(25) of CONNECTOR CN1 of LCD-
CONT-UNIT, and is CLK signal (CK2
±) sent to pins (24)/(23)?
NO
Check CONNECTOR
(SC2302, CN1) and
HARNESS WIRE (LV).
(SC2302, CN1) and
HARNESS WIRE (LV).
YES
Is power (+12V) supplied to pins (1) - (5) of CONNECTOR CN2 in LCD-CONT-UNIT?
NO
Check CONNECTOR (CN2,
P707) and HARNESS WIRE
(PL).
P707) and HARNESS WIRE
(PL).
YES
Replace LCD-CONT-UNIT.
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