Sharp Aquos LC-32GD4U, Руководство по обслуживанию

Страница: 45 / 222

45
LC-32GD4U
LC-37GD4U
TROUBLE SHOOTING TABLE
(Continued)
YES YES YES
YES YES
YES YES
NO NO NO NO NO
NO NO
NO
YES YES YES YES YES YES
NO NO NO NO NO
YES
NO NO
<SUB VIDEO>
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 IC3800 (A
V SWITCH)?
<Composite video signal input> Is there signal input at pin (3)? <S-video signal input> Are there
Y
-signal input at pin (5) and C-
signal input at pin (7)?
Select V
ideo 3 and the input signal in the
input switching menu screen. If signal name is gray and not selectable in the menu screen
Is composite video signal detection functioning normally? Check between pin (3) of J1
103 and pin (12) of IC1
102.
Is S-video signal detection functioning normally? Check between pin (6) of J1
102
and pin (6) of IC3800.
Check between pin (2) of J1
103 and pin
(3) of IC3800. Check between pins (3), (4) of J1
102 and
pins (5), (7) of IC3800.
<Composite video signal / S-video signal> input
<Composite video signal input>
Are there MAIN VIDEO signal output at pin (60) of IC3800 and SUB VIDEO signal output at pin (56)
?
<S-video signal input>
Are there MAIN
Y
-signal output at pin (60) and MAIN C-signal output at pin (59) of IC3800, and SUB
Y
-sig
nal output at pin (56) and SUB C-signal output at pin (55)?
<Composite video signal input>
Are there video signal input at pin (2) of IC401 (MAIN L.P
.F
.) and at pin (2) of IC501 (SUB L.P
.F
.)?
<S-video signal input>
Are there MAIN
Y
-signal input at pin (2) and MAIN C-signal input at pin (6) of IC401, and SUB
Y
-signal i
nput at pin (2) and SUB C-signal input at pin (6) of IC501?
<MAIN VIDEO>
Check between IC401 and IC400.
<Composite video signal input> Is there video signal input at pin (85) of IC400 (MAIN VIDEO CHROMA)? <S-video signal input> Are there MAIN
Y
-signal input at pin (85)
and MAIN C-signal input at pin (90) of IC400 (MAIN VIDEO CHROMA)?
Are there digital video signal outputs at pins (43), (44), (46)~(49), (54), (55) and (58) of IC400?
Check IC 400 (MAIN VIDEO CHROMA) and the peripheral circuits.
No video output (2)
No video output (3)
No tuner (U/V) video output
Is there video signal output at output pin (17) of the tuner (TU1
101/1
102)?
Are there video signal inputs at pins (7) and (1) of IC1
103 (LEVEL
ADJ)?
Is each tuner video input to IC3800 (A
V
SWITCH) normal? Pin (17) (MAIN
TUNER IN) of IC3800
Pin (19) (SUB
TUNER IN) of IC3800
Check the tuner (TU1
101/1
102) and its
peripheral circuits. Replace if necessary
.
Are there inputs of level adjustment control signals at pins (6) and (2) of IC1
103
(LEVEL
ADJ) from pins (1) and (2) of IC1
105?
Check IC1
105 (CONTROL) and the peripheral
circuits. Replace if necessary
.
Check IC3800 (A
V SWITCH) and the
peripheral circuits. Check between IC3800 and IC401/IC501.
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?
<Composite video signal input> Is there video signal input at pin (85) of IC500 (SUB VIDEO CHROMA)? <S-video signal input> Are there SUB
Y
-signal input at pin (85)
and SUB C-signal input at pin (90) of IC500 (SUB VIDEO CHROMA)?
Check between IC501 and IC500.
Are there digital video signal outputs at pins (43), (44), (46)~(49), (54), (55) and (58) of IC500?
Check IC500 (SUB VIDEO CHROMA) and the peripheral circuits. Replace the main PWB, or check between IC400/IC500 and IC3201. Check IC3201 (L
VDS
TRANSMITTER) and
the peripheral circuits.
Check the LCD CONTROL
PWB.