Read Sharp LL-T2015 Service Manual online
LL-T2015-B/H
TROUBLESHOOTING
4 – 4
(No)
(No)
(No)
(Yes)
(Yes)
(Yes)
(Yes)
(No)
(No)
(Yes)
(No)
(No)
(Yes)
(Yes)
(Yes)
(No)
(Yes)
(No)
(No)
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(No)
(Yes)
(No)
(Yes)
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(Yes)
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(No)
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(Yes)
GAIN CONTROL and WHITE BALANCE
are set properly?
are set properly?
Analog color signal output (C302, C305,
C307, C313, C316, and C318) is normal?
C307, C313, C316, and C318) is normal?
Digital color signal output of IC402
(GRE0~7, GGE0~7, GBE0~7, DRO0~7,
GGO0~7, GBO0~7) is normal?
(GRE0~7, GGE0~7, GBE0~7, DRO0~7,
GGO0~7, GBO0~7) is normal?
Digital color signal output of IC502
(DRE0~7, DGE0~7, DBE0~7, DRO0~7,
DGO0~7, DBO0~7) is normal?
(DRE0~7, DGE0~7, DBE0~7, DRO0~7,
DGO0~7, DBO0~7) is normal?
Check circuits around IC701, and CN701
and LCD module.
and LCD module.
Check circuits around IC402 and IC502.
Digital color signal output of IC402
(GRE0~7, GGRE0~7, GBE0~7, GRO0~7,
GGO0~7, GBO)~7 is normal?
(GRE0~7, GGRE0~7, GBE0~7, GRO0~7,
GGO0~7, GBO)~7 is normal?
Press INPUT key to switch over to the
correct input signal port.
correct input signal port.
Check CN101 and signal source and digital
signal cable.
signal cable.
Check CN101 and signal source and digital
signal cable.
signal cable.
Display is normal in composite sync and sync-
on-green signal input.
on-green signal input.
Adjustment settings are stored after display
screen is adjusted?
screen is adjusted?
AUTO function of GAIN CONTROL operates
properly?
properly?
Input signal port is the one to which digital
signal cable is connected?
signal cable is connected?
Waveforms of IC101 1st and 2nd pins change
normally when resolution is changed?
normally when resolution is changed?
Test terminals LD106, LD107, LD108, LD109
are DC+3.3V?
are DC+3.3V?
CN101 signals (at 1st, 2nd, 9th, 10th, 17th,
18th, 23rd, and 24th pins) are normal?
18th, 23rd, and 24th pins) are normal?
IC102 and IC202 signal output
(GRE0~7, GGRE0~7, GBE0~7, GRO0~7,
GGO0~7, GBO0~7, GFBK, GVS, LD105,
GPENSOG) are normal?
(GRE0~7, GGRE0~7, GBE0~7, GRO0~7,
GGO0~7, GBO0~7, GFBK, GVS, LD105,
GPENSOG) are normal?
LCD screen color is abnormal?
Input is changed over properly?
No error.
Display is normal in analog input?
R101 is in H level (DC+5V)?
Check circuits around IC502.
Adjust according to "screen adjustment
procedure".
procedure".
Check circuits around Q301~ Q306 and IC402.
Check circuits around IC402 and IC502.
Check circuits around IC502 and IC701.
Check circuits around IC402 and IC502.
Check circuits around IC502.
check circuits around IC502 and IC602.
Check circuits around IC402.
First, check with analog signal input.
Check circuits around IC103.
Check circuits around IC102.
continued from 4
The display does not work. (with digital connection, DVI-D cable use)
Check circuits around IC101.
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