Read Sharp LL-T1811W (serv.man3) Service Manual online
LL-T1811W
3 – 3
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Check DC+5V power supply line and
circuits around IC2.
circuits around IC2.
Test terminal LD6 is DC+3.3 V?
Check DC+3.3 power supply line and
circuits around IC1.
circuits around IC1.
Test terminal LD8 is DC+2.5 V?
Check DC+2.5 V power supply line and
circuits around IC3.
circuits around IC3.
The entire LCD screen is white?
Clocks (FL3, FL4) and DE FL1, FL2)
signal outputs are normal?
signal outputs are normal?
Check CN3 and LCD module.
The entire LCD screen is black?
The voltage at both ends of fuse F3 is
DC+12.0 V?
DC+12.0 V?
Check POWER CTRL2 signal and
areas around Q4.
areas around Q4.
+ side of C28 is DC+5 V?
Check areas around L10.
Check circuits around X1, X2 and IC24.
The size of LCD screen is abnormal?
ADJUSTMENT and MODE SELECT are
set properly?
set properly?
Adjust according to screen adjustment
procedure”.
procedure”.
Check circuits around X1, X2, IC24 and
C22.
C22.
LCD screen jitters or flickers?
ADJUSTMENT and MODE SELECT
are set properly?
are set properly?
Adjust according to screen adjustment
procedure”.
procedure”.
Check circuits around IC19, IC20, IC33.
LCD screen colors are abnormal?
GAIN CONTROL and WHITE BALANCE
are set properly?
are set properly?
Adjust according to “Screen adjustment
procedure”.
procedure”.
Check circuits around IC27.
Abnormal area moves when
BRIGHT/CONTRAST is changed by
gradation pattern?
BRIGHT/CONTRAST is changed by
gradation pattern?
Display RGB color gradation out of
FL1-FL12 output data lines. Check the
line corresponding to the abnormal color.
FL1-FL12 output data lines. Check the
line corresponding to the abnormal color.
Check circuits around IC10, Ic11, and
IC12.
IC12.
Adjustment settings are stored after
display screen is adjusted?
display screen is adjusted?
Check circuits around IC4 and Ic24.
Input is changed over properly?
Check circuits around IC27.
No error.
2
Perform
Test terminal LD7 is DC+5V?
Analog color signal output is normal?(IC6
side terminals of C153, C156 and C161)
side terminals of C153, C156 and C161)
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