Sharp AQUOS LC-26GA5H, Service Manual

Page: 41 / 167

41
LC-26GA5H/M/X
No picture (3)
Is the digital video signal inputted to the f
ollo
wing pins of IC3201 (L
VDS_TRANSMITTER):
(53), (54), (57) thr
u (60), (51), (52)
(RE0-7);
(63) thr
u (68), (61), (62)(GE0-7);
(73) thr
u (78),
(69), (70)(BE0-7);
(81) thr
u (86), (79), (80)(R
O0-7);
(91) thr
u (96), (89), (90)(GO0-7);
(99), (100), (1), (2), (5), (6), (97),
(98)(BO0-7);
(7) thr
u (10)(HSYNC
,
VSYNC
, DE, CLKIN)?
Is the digital video signal outputted to the f
ollo
wing pins of IC3201:
(49)(T
A1-), (48)(T
Al+), (47)(TB1-), (46)(TBl+), (44)(TC1
-), (43)(TCl+), (41)(TCLK-), (42)(TCLK+), (40)(TD1-),
(39)(TD1+), (37)(T
A2-), (36)(T
A2+), (35)(TB2-), (34)(TB2+), (32)(TC2-), (31)(TC2+), (30)(TCLK2-), (29)(TCLK2+), (28)(TD2-) and
(27)(TD2+)?
YES YES YES YES
YES
YES
NO
No
TV picture appear
.
Is the
TV video signal outputted to pin (17) of the tuner?
Are the main video signal and sub video signal outputted to pins (56) and (44) of IC3801, respectiv
ely?
Chec
k the tuner and its per
ipher
al circuits
.
NO
Is
TV selected on the input select men
u screen?
Select
TV on the input select men
u screen.
Mak
e sure
A
udio Only is off
.
NO
Is the
TV video signal outputted to pin (5) (TP1101)
of IC1103 (LEVEL ADJ
.)?
See if the le
v
el control signal is coming from IC1104
to pin (6) of IC1103.
NO
Is the video signal inputted to pin (8) of IC401 (MAIN L.P
.F
.) and pin (2) of IC600 (SUB L.P
.F
.)?
Is the
TV video signal inputted to pin (63) of IC3801
(A
V SWITCH)?
YES
Replace the main PWB
, or chec
k the lines from IC402,
IC502 and IC601 up to IC3201.
Chec
k IC3801 and its per
ipher
al circuits
.
NO
Is the video signal inputted to pin (8) of IC402 (MAIN 3D-YC & CHR
OMA)?
YES
NO
Chec
k the line betw
een IC401 and IC402.
Is the digital video signal outputted from pins (124) thr
u (133) as w
ell as (140) thr
u (159) of IC402?
YES
NO
Chec
k IC402 and its per
ipher
al circuits
.
Chec
k IC320 (L
VDS_TRANSMITTER)
and its per
ipher
al circuits
.
YES
Chec
k the lines from IC3801 up to IC401 and IC600.
Chec
k the LCD control PWB
.
YES
NO
<Main system> 3D-YC<P
ALNTSC>
YES
Is the video signal inputted to pin (12) of IC502 (MAIN 2D-YC & CHR
OMA)?
YES
NO
Chec
k the line betw
een IC401 and IC502.
Is the digital video signal outputted from pins (115) thr
u (126) as w
ell as (133) thr
u (144) of IC502?
YES
YES
NO
Chec
k IC502 and its per
ipher
al circuits
.
<Main system> 2D-YC<SECAM>
YES
Is the video signal inputted to pin (72) of IC601 (SUB 2D-YC & CHR
OMA)?
YES
NO
Chec
k the line betw
een IC401 and IC601.
Is the digital video signal outputted from pins (31) thr
u (50) of IC601?
YES
NO
Chec
k IC601 and its per
ipher
al circuits
.
<Sub system>
TROUBLE SHOOTING TABLE
(Continued)