NO picture on display via EXT-1 RGB input
No picture on LCD screen when EXT-1 RGB 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 RGB signals arriving to pins 15A(R), 11A(G) and 7A(B)
of SCART1 (X027-1) ?
no
Check external connection, input setting, SCART1 and peripheral
circuits.
v
yes
are RGB signals arriving to video switch TDA8601 (D1301)
at pins 8, 7 and 6 ?
no
check C1322(R), C1318(G), C1314(B) and check peripheral on
SCART1_RGB signals (termination R, ESD protection diode,…)
v
yes
are RGB signals arriving to both sides of C0177(R), C0175(G) and
C0164(B) ?
no
Check video switch TDA8601 (D1301) power supply (+8V_SW) and
peripherals
Check if SLCT_RGB_YPbPr is set correctly
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
6-6
