Sharp LC-32WD1E/S/RU Service Manual page 40

LC-32WD1E/S/RU, LC-37WD1E/S/RU, LC-42WD1E/S/RU, and LC-32/37/42WT1E
NO picture on display via EXT-2 RGB input
No picture on LCD screen when EXT-2 RGB input source selected
Checklist:
1) Is "INPUT SOURCE" button
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
Are RGB signals arriving to pins 15B(R), 11B(G) and 7B(B)
of SCART2 (X027-2) ?
are RGB signals arriving to video switch TDA8601 (D1302)
at pins 8, 7 and 6 ?
are RGB signals arriving to both sides of C0178(R), C0176(G) and
C0165(B) ?
Is TDA15134E (D013) UOCV_DVCLK clock there
AND are the UOCV_DV(x) signals toggling?
are UOCV_DV(x) and UOCV_DVCLK signals arriving to
the CPLD (D080) (XC2C128-7TQG144C) ?
GOTO VIDEO PATH CHECK
on the remote control set up correctly ? ==> See operation manual and set "INPUT SOURCE" to "EXT2"
yes
yes
yes
yes
yes
yes
Check external connection, input setting, SCART2 and peripheral
no
check C1338(R), C1334(G), C1331(B) and check peripheral on
SCART2_RGB signals (termination R, ESD protection diode,...)
no
Check video switch TDA8601 (D1302) power supply (+8V_SW) and
no
Check if SLCT_RGB_YPbPr is set correctly
TDA15134E (UOCV) (D013) is not functioning normal,
no check GTV SW and peripherals (power supply,xtal,...) of D013
check resistor networks on UOCV_DV signals
no
6-9
circuits.
peripherals