Sharp Aquos LC-45GD1E, Service Manual

Page: 56 / 281

56
TU-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
(MAIN V
ideo System)
(SUB V
ideo System)
No picture (3)
Set-up Confirmation : 1) Is the "INPUT
SOURCE" of the remote controller set up correctly?
•••
See the Operation Manual and set the "INPUT
SOURCE" " " to "TV".
2) Is the "Audio Only" in MENU-Option set to "On"?
•••
Set it "Of
f".
Is there video signal (CVBS) output at pin (17) (V
ideo output terminal) of
T
uner(TU1
101)?
<On input of the tuner (U/V)> Is there video signal input at pin (7) of IC1
106 (VCA-Amp)?
Is there video signal output at pin (5) of IC1
106 (VCA-Amp)?
Is there video signal (CVBS) input at pin (63) of IC3801 (A
V
-SW)?
YES YES YES YES YES YES YES
(A
V PWB):
Are the MAIN-V
ideo (YCV) and SUB-V
ideo (SUB.V) signal output to Pin (56) and Pin (44) of IC3801 respectively?
Is the VIDEO signal input to input terminals of Pin (8) of IC402 (3D-YC) and Pin (16) of IC502 (2D-YC)?
On and after this, see the term (1) in "No picture".
On and after this, see the term (1) in "No picture".
Check between IC1
106 and IC3801.
Check the tuner (TU1
101) and its peripheral
circuits. Check IC401 (LPF) /IC503 (LPF) thru IC402 (3D-YC)/IC502 (2D-YC).
NO NO NO NO NO
Is the VIDEO signal input to the input terminal Pin (72) of IC601 (VPC)?
Check IC3801 (A
V
-SW) and peripheral
circuits.
Check Pins (56)(44) of IC3801 thru IC401/IC503/IC600. Check IC600 (LPF) thru IC601 (VPC).
NO NO NO
(MAIN PWB):
Are the MAIN-V
ideo (Y/VOUT1) and SUB-V
ideo (Y/VOUT2) signal input to Pin (8) of IC401/Pin (2) of IC503 and Pin (2)
of IC600 respectively?
Check between the tuner and IC1
106.
Check IC1
106 and its peripheral circuits.
No video output on the tuner (U/V) reception.
YES