Sharp LC-46XD1E/RU, Руководство по обслуживанию

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LC-46/52XD1E-RU
6 – 9
<0n input of the tuner (U/V)> No picture on the display (1)
No picture appears on
LCD during the tuner
(U/V) reception.
Checklist:
1) Is "INPUT SOURCE" button on the remote control set up correctly ? ... See the operation manual and set "INPUT SOURCE" to "TV".
2) Is MENU-Picture-Contrast/Brightness set to "MIN" ? ... Set it to an appropriate level.
3) Is ANT-CABLE disconnected or connected improperly? ...Connect it correctly as per the operation manual.
YES
Is level of pins (9) and
(8) of tuner (TU201) and
pins (12) and (2) of
IC204 (MULTI) at H? NO These are communica-
tions lines for control
(I2C). Follow the path and
check whether they are
forced to
L(PULL_DOWN).
YES
Is the video signal (IF)
sent from pin (11) of
tuner (TU201 )? NO Check the tuner (TU201)
and peripheral circuits.
YES
Is the video signal
CVBS sent to pin
(AC23) of lC3002 (V-
PRO.)? NO Check CONNECTOR
(P201 /SC2705) 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
Is LVDS video signal (TA
±
- 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).
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).
YES
Replace LCD-CONT-UNIT.