Sharp LC-26GA3E, Руководство по обслуживанию

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37
LC-26GA3E
TROUBLE SHOOTING TABLE
(Continued)
YES
YES YES
YES
YES YES
NO NO NO
External input in trouble <INPUT
-1>
Is INPUT
-1 selected in the input switching
menu screen?
Is there signal input at each input pin of IC3805 (A
V SWITCH)?
<RGB signal input> Is RGB signal supplied to pins (63), (61) and (59)?
<COMPONENT
/ RGB signal> input
Are MAIN image signal, P
ASS image signal and SUB image signal sent to pins (50), (48) and (46) (Y
Pb, Pr), pins (38), (36) and
(34) (Y
Pb, Pr) and pins (44),
(42) and (40) (Y
Pb, Pr) of IC3805, respectively?
No video output (2)
Check IC3805 (A
V SWITCH) and the
peripheral circuits.
Are there digital video signal inputs at pins (53), (54), (57)~(60), (51), (52) (RE0-7), pins(63)~(68), (61), (62) (GE0-7), pin
s (73)~(78), (69), (70) (BE0-7), pins
(81)~(86), (79), (80) (RO0-7), pins (91)~(96), (89), (90) (GO0-7), pins (99), (100), (1), (2), (5), (6), (97), (98) (BO0-7), an
d pins (7)~(10) (HSYNC, VSYNC, DE,
CLKIN) of IC3201 (L
VDS
TRANSMITTER)?
Are there digital video signal outputs at pins (49)(T
A1—), (48)(T
A1+), (47)(TB1—), (46)(TB1+), (44)(TC1—), (43)(TC1+), (41)(TCL
K—), (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+) of IC3201?
Replace the main PWB, or check between IC402/IC502/IC601 and IC3201. Check IC3201 (L
VDS
TRANSMITTER) and
the peripheral circuits.
Check the LCD CONTROLLER PWB.
NO
Select INPUT
-1 on the input
switching menu screen and then select the input signal.
NO
<RGB signal input> Check between pins (15), (1
1)
and (7) of SC1
101 and pins
(63), (61) and (59) of IC3805.
External input in trouble <INPUT
-3>
Is INPUT
-3 selected in the input switching
menu screen?
Is there signal input at each input pin of IC3805 (A
V SWITCH)?
<COMPONENT
signal input>
Is
Y
, Pb, Pr signal supplied to pins (15), (17)
and (19)?
NO
Select INPUT
-3 on the input
switching menu screen and then select the input signal.
NO
<COMPONENT
signal input>
Check between pins (9), (6) and (3) of J1
101 and pins (15),
(17) and (19) of IC3801.
YES YES
YES
NO NO
YES
Is digital image signal sent from pins (1
15)-
(126) and (133)-(144) of IC502? Is MAIN image signal supplied from pins (50), (48) and (46) (Y
Pb, Pr) of IC3805 to
pins (24), (29) and (32) (Y
Cb, Cr) of IC502
(2D-YC & CHROMA)?
<RGB signal> <MAIN >
Check between IC3805 and IC502.
YES
NO
YES
Is video signal supplied from pins (44), (42) and (40) (Y
Pb, Pr) of IC3805 to pins (8),
(10) and (13) (Y
Pb, Pr) of IC600 (L.P
.F)?
Is video signal supplied from pins (2), (1) and (3) (Y
Cb, Cr) of IC601 (2D-YC & CHROMA)?
<RGB/COMPONENT
signal>
<SUB>
Check between IC3805 and IC600.
YES
NO
Is digital image signal sent from pins (31)- (40) and (41)-(50) of IC601?
Check between IC600 and IC601.
Check IC 502 and the peripheral circuits.
NO
Check IC 601 and the peripheral circuits.
YES
NO
YES
Is video signal supplied from pins (38), (36) and (34) (Y
Pb, Pr) of IC3805 to pins (9),
(12) and (14) (Y
Pb, Pr) of IC401 (L.P
.F)?
Is MAIN image signal supplied from pins (8), (18) and (20) (Y
Cb, Cr) of IC402 (3D-YC &
CHROMA)?
<COMPONENT
signal>
<MAIN>
Check between IC3805 and IC401.
YES YES
NO
Is digital image signal sent from pins (124)- (133) and (140)-(159) of IC402?
Check between IC401 and IC402.
NO
Check IC 402 and the peripheral circuits.