Sharp Aquos LC-32GA3E, Руководство по обслуживанию, Страница: 39 / 187

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LC-32GA3E
LC-37GA3E
TROUBLE SHOOTING TABLE
(Continued)
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YES
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YES
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<Signals>
<CVBS,
Y/C, S-VIDEO signal> input
No VIDEO output (1)
External input in trouble <lNPUT
-1>
Is Input1 selected in the input switching menu screen?
Select Input1 and the input signal in the input switching menu screen .
Is there VIDEO signal input at each VIDEO input terminal of IC3801 (A
V SWITCH)?
(CVBS signal input) Check between pin (20) of SC1
101
and pin (1) of IC3801.
External input in trouble <INPUT
-2>
Is Input 2 selected in the input switching menu screen?
Select Input 2 and the input signal in the input switching menu screen.
Is there VIDEO signal input at each VIDEO input terminal of IC3801 (A
V SWITCH)?
(Y/C VIDEO signal input) Are there
Y
and C signals input at pins (10) and (12)?
(CVBS signal input) Is there VIDEO signal input at pin (8) ?
(CVBS signal input) Check between pin (20) of SC1
102 and
pin (8) of IC3801 . (Y/C VIDEO signal input) Check between pins (20) and (15) of SC1
102 and pins (10) and (12) of IC3801.
External input in trouble <INPUT
-3>
Is Input 3 selected in the input switching menu screen?
Select Input 3 and the input signal in the input swltching menu screen.
Is there VIDEO signal input at each VIDEO input terminal of IC3801 (A
V SWITCH)?
(CVBS signal input) Is there VIDEO signal input at pin (15)? (Y/C VIDEO signal input) Are there
Y
and C signals input at pins (17) and (19)?
(CVBS signal input) Check between pin (20) of SC1
103 and
pin (15) of IC3801. (Y/C VIDEO signal input) Check between pins (20) and (15) of SC1
103 and pins (17) and (19) of IC3801.
External input in trouble <lNPUT
-4>
Is Input 4 selected in the input switching menu screen ?
Select Input 4 and the input signal in the input switching menu screen.
Check IC3801 (A
V SWITCH) and the peripheral circuits.
Is there VIDEO signal input at each VIDEO input terminal of IC3801 (A
V SWITCH)?
(S-VIDEO signal input) Are there
Y
and C signals input at pins (24) and (26)?
(VIDEO signal input) Is there VIDEO signal input at pin (22) ?
(VIDEO signal input) Check between pin (2) of J142 and pin (22) of IC3801. (S-VIDEO signal input) Check between pins (3) and (4) of J141 and pins (24) and (26) of IC3801.
(CVBS, VIDEO Signal Input) :
Are there MAIN VIDEO signal output at pin (56) of IC3801 and SUB VIDEO signal output at pin (44)?
(Y/C, S-VIDEO Signal Input):
Are there MAIN-Y
signal output at pin (56) of IC3801 , MAIN-C signal output at pin (58), SUB-Y
sig
nal output at pin (44) and SUB-C signal output at pin (47)?
(CVBS, VIDEO Signal Input) :
Are there VIDEO signals input at pin (8) of IC401 (MAIN L.P
.F
.) and pin (2) of IC600 (SUB L.P
.F
.)?
(Y/C, S-VIDEO Signal Input) :
Are there MAIN-Y
and MAIN-C signals input at pins (8) and (1
1) of IC401.
Are there SUB-Y
and SUB-
C signals input at pins (2) and (6) of IC600?
<MAIN> 3D-YIC (P
AL)
(CVBS, VIDEO signal input) Is there VIDEO signal input at pin (8) of IC402 (MAIN 3D-YC & CHROMA) ? (Y/C, S-VIDEO signal input) Are there
Y
and C signals input at pins (8) and
(18) of IC402 (MAIN 3D-YC & CHROMA) ?
Check between IC401 and IC402.
Are there digital VIDEO signal outputs at pins (124)-(133) and (140)-(159) of IC402?
Check IC402 and the peripheral circuits
<MAIN> 2D-Y/C (SECAM)
(CVBS, VIDEO signal input) Is there VIDEO signal input at pin (12) of lC502 (MAIN 2D-YC & CHROMA) ? (Y/C, S-VIDEO signal input) Are there
Y
and C signals input at pins (12) and
(16) of IC5O2 (MAIN 2D-YC & CHROMA) ?
Check between IC401 and IC502.
Are there digital VIDEO signal outputs at pins (1
15)-(126) and (133)-(144) of IC502?
Check IC502 and the peripheral circuits.
<SUB>
(CVBS, VIDEO signal input) Is there VIDEO signal input at pin (72) of IC601 (SUB 2D-YC & CHROMA) ? (Y/C, S-VIDEO signal input) Are there
Y
and C signals input at pins (72)
and (71) of IC601 (SUB 2D-YC & CHROMA) ?
Check between IC401 and IC601.
Are there digital VIDEO signal outputs at pins (31)-(40) and (41)-(50) of IC601 ?
Check IC601 and the peripheral circuits.
Check between IC3801 and IC401/IC600.
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) (B
O0-7), and pins (7)-(10)
(HSYNC, VSYNC, DE, CLKIN) of IC3201 (L
VDS
TRANSMITTER)?
Replace the main PWB, or check between IC402/C502/lC601 and IC3201.
Are there digital VIDEO signal outputs at pins (49)(T
A1-), (48)(T
A1+), (47)(TB1 -), (46)(TB1 +), (44)(TC1 -), (43)(TC1 +),(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+) of IC3201?
Check IC3201 (L
VDS_TRANSMITTER)
and the peripheral circuits.
Check the LCD CONTROL
PWB.
(CVBS signal input) Is there VIDEO signal input at pin (1) ?