Read Sharp LC-45GD1E (serv.man29) Service Manual online
56
TU-45GD1E
LC-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
No picture (5)
Is OSD including the menu and the list of
programs displayed in the panel?
No digital broadcasting displayed in the
panel of the liquid crystal
TV
.
<On input of the digital tuner>
NO
Is the digital signal including Data and CLK
output to Pins (2-1
1)(13) of P8903?
NO
Check P8903 thru IC8601, IC8601, IC8801
thru 8802, IC8804 thru 8805 and peripheral
circuits.
Are there no problems with voltage at Pin (2)
of
TU9001 (5V) and Pin (50) and Pin (64) of
IC9008 (1.8V and 3.3V) respectively?
Is voltage at Pin (2)(3) of P9001 not lower
than 10V?
NO
NO
Check the PWB (RDENCA084WJZZ).
Is the DTV
-IN signal input to Pins (190-200)
of IC402 (3D-YC)?
NO
Check IC402 thru SC2101.
NO
Confirm peripheral circuits of
TU9001, and
try to replace
TU9001.
Check IC9001 thru 9002, IC9009 thru 9014,
IC9004 and peripheral circuits.
Is the VIDEO signal output to Pins (124-
133) of IC402?
NO
Check IC402 and peripheral circuits.
YES
YES
YES
YES
YES
YES
Is 4MHz CLK output from Pin (10) of
TU9001?
Check the signal of
TU9001 thru IC9008
and IC8601 thru IC9008, and peripheral
circuits.
YES
Check circuits IC802/IC3300/IC3201 and
peripheral ones.
No picture (6)
Is the CVBS signal output from Pin (24) of
P8903?
No digital broadcasting video output to the
Display/Record terminal.
<On input of the digital tuner>
NO
Is the DTV
-CVBS signal input to Pin (60) of
IC3801 (A
V
-SV)?
Check the MA-Connector (P3802)(P7201)
and the connection of B/B (SC2101)(P8903).
NO
NO
Check IC8905 and peripheral circuits.
NO
Confirm IC3801 and peripheral circuits.
YES
Is the digital signal including Data and CLK
input to Pins (69) thru (79) of IC8905?
NO
Check IC8801 thru 8802, IC8804 thru 8805,
IC8601 and peripheral circuits.
YES
YES
YES
Are the MAIN-Y
and SUB-Y
signal output to
Pin (56) and Pin (44) of IC3801 (A
V
-SV)
respectively?
Is the VIDEO signal output to DISPLA
Y
-
OUTPUT1 (SC3102)?
See the term of "No
picture
to the
Display".
YES
(Addition from an Engineering 4 technical document)
Go back to "No
picture (1)" and
check from last item.
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