Sharp LC-32WD1E/S/RU - Page 41

NO picture on display via EXT-2 Y/C input
No picture on LCD screen when EXT-2 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 "EXT2"
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 20B(Y) and 15B(C)
of SCART2 (X027-2) ?

no
Check external connection, input setting, SCART2 and peripheral
circuits.
v yes
is C signal arriving to video switch TDA8601 (D1302)
at pin 8 ?

no
check C1338 and check peripheral on SCART2_R_C signal
(termination R, ESD protection diode,…)
v yes
are Y/C signals arriving to both sides of C0178(C) and C0169(Y) ?

no
Check video switch TDA8601 (D1302) power supply (+8V_SW) and
peripherals, Check if SLCT_RGB_YPbPr is set correctly.
Check C0169, check peripheral on SCART2_Y_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
6-10