SHARP LC-26GA3H
Manual de Servicio

No picture (3)

No TV picture appear.

Is TV selected on the input select menu screen? Audio Only is off.

NO Select TV on the input select menu screen. Make sure NO NO Is TV video outputted to pin (5) (TP1101) See if the level control signal is coming from IC1104

YES

Is TV video signal outputted to pin (17) of tuner? Check the tuner and its peripheral circuits.

YES

IC1103 (LEVEL ADJ.)? to pin (6) of IC1103.

YES
Check IC3801 and its peripheral circuits.

Is the TV video signal inputted to pin (63) of IC3801 NO (AV SWITCH)?

YES NO YES NO

Are main sub video signal outputted pins (56) (44) of IC3801, respectively? Check the lines from IC3801 up to IC401 and IC600.

Is the video signal inputted to (8) IC401 (MAIN L.P.F.) and pin (2) of IC600 (SUB L.P.F.)?

YES <Main system>

3D-YC<PALNTSC> 2D-YC<SECAM> <Sub system> (8) IC402 (12) IC502 Is the video signal inputted to pin (72) of IC601 3D-YC (MAIN (SUB 2D-YC & CHROMA)?

YES NO

IC402. IC502. Check the line between IC401 and IC601.

(124) (115) Is the digital video signal outputted from pins (31) (140) (159) IC402? (126) well as (133) (144) IC502? thru (50) of IC601?

TROUBLE SHOOTING TABLE (Continued)

43
YES
Replace main PWB, or check the lines from IC402, IC502 and IC601 up to IC3201.

YES NO

IC402 IC502 Check IC601 and its peripheral circuits.

Is digital video signal inputted to the following pins of IC3201 (LVDS_TRANSMITTER): (53), (54), (57) (60), (51), (52)(RE0-7); (63) (68), (61), (62)(GE0-7); (73) thru (78), (69), (70)(BE0-7); (81) (86), (79), (80)(RO0-7); (91) (96), (89), (90)(GO0-7); (99), (100), (1), (2), (5), (6), (97), (98)(BO0-7); (7) thru (10)(HSYNC, VSYNC, DE, CLKIN)?

Is digital video signal outputted to the following pins of IC3201: (49)(TA1-), (48)(TAl+), (47)(TB1-), (46)(TBl+), (44)(TC1-), (43)(TCl+), (41)(TCLK-), (42)(TCLK+), (40)(TD1-), (39)(TD1+), (37)(TA2-), (36)(TA2+), (35)(TB2-), (34)(TB2+), (32)(TC2-), (31)(TC2+), (30)(TCLK2-), (29)(TCLK2+), (28)(TD2-) and (27)(TD2+)?

YES
the LCD control PWB. Check IC320 (LVDS_TRANSMITTER) and its peripheral circuits.

LC-26GA3H/M/X