Sharp Aquos LC-32WT1E, Руководство по обслуживанию

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NO picture on display via EXT-1 Y/C input
No picture on LCD screen when EXT-1 Y/C input source selected
Checklist:
1) Is "INPUT SOURCE" button on the remote control set up correctly ? ==> See operation manual and set "INPUT SOURCE" to "EXT1"
2) Is MENU-PICTURE-Contrast/Brightness set to "MIN" ? ==> Set it to appropriate level
3) Check connection to external device ==> Connect it correctly as per the operation manual for the device
v
yes
Are Y/C signals arriving to pins 20A(Y) and 15A(C)
of SCART1 (X027-1) ? no
Check external connection, input setting, SCART1 and peripheral
circuits.
v
yes
is C signal arriving to video switch TDA8601 (D1301)
at pin 8 ? no
check C1322 and check peripheral on SCART1_R signal (termination
R, ESD protection diode,…)
v
yes
are Y/C signals arriving to both sides of C0177(C) and C0132(Y) ?
no
Check video switch TDA8601 (D1301) power supply (+8V_SW) and
peripherals, Check if SLCT_RGB_YPbPr is set correctly.
Check C0132, check peripheral on SCART1_CVBS_IN signal
(termination R, ESD protection diode,…)
v
yes
Is TDA15134E (D013) UOCV_DVCLK clock there
AND are the UOCV_DV(x) signals toggling? no
TDA15134E (UOCV) (D013) is not functioning normal,
check GTV SW and peripherals (power supply,xtal,…) of D013
v
yes
are UOCV_DV(x) and UOCV_DVCLK signals arriving to
the CPLD (D080) (XC2C128-7TQG144C) ? no
check resistor networks on UOCV_DV signals
v
yes
GOTO VIDEO PATH CHECK
LC-32WD1E/S/RU, LC-37WD1E/S/RU, LC-42WD1E/S/RU, and LC-32/37/42WT1E
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