lw26a33Troubleshooting.pdf

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5 Troubleshooting
5-1 No Power
No
LAMP off, power indicator
LED red color?
Check a connection a power cable.
(BH39-10339H)
Yes
No
Does proper DC 12V
appear at C812, C813, C814?
Change a Assy PCB Power.
(BN94-00443F)
Yes
Does proper DC A3.3V,
A5V, A1.8V appear at
C873, C861, C884?
Check a IC816, IC814, IC818.
Change a main PCB ass'y.
(BN94-00539A)
No
Yes
Does proper DC 5V, 3.3V,
2.5V, 9VS, A1.8V appear at
C831, C835, C850, C895, C884?
Check a IC811, IC812, IC813, IC606,
IC818. Change a main PCB ass'y.
(BN94-00539A)
No
Yes
Does proper DC 33V,
1.2V_SNI_D, 1.2V_SNI_PLL,
3.3V_SNI_D, 3.3_SNI_PLL,
+3.3V_MD, +2.5V_MD1,
MDIN_APLL, MDIN_DPLL
appeart at C827, C865, C878,
C551, C570, C416, C429,
C447, C451?
Check a IC812, IC815, IC817, FT522,
FT512, FT406, FT407, FT410, FT411.
Change a main PCB ass'y.
(BN94-00539A)
No
Yes
Check a other function.
(No picture part)
Replace a lcd panel.
(BN07-00121A)
No
A power is supplied to set?
LW26A33W
5-1
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5 Troubleshooting
5-2 No Video (Analog PC Signal)
Power Indicator is off.
Lamp on, no video.
Yes
No
Check a PC source and check
the connection of DSUB cable?
Input a analog PC signal and
connected cable.
Yes
Check IC101, PC cable. Change a PC
cable. Change a main PCB ass'y
(BN94-00539A).
No
Does the signal appear at
#54, 48, 43 (R, G, B) of IC101?
1
Yes
Does the digital data
appear at output of
RA101~RA104, RA106, RA107?
Check a IC101.
Change a main PCB ass'y
(BN94-00539A).
No
2
Yes
Does the digital data appear
at output of RA605, RA606,
RA608, RA611, RA613, RA615?
Check a IC602, IC601.
Change a main PCB ass'y
(BN94-00539A).
No
3
Yes
Does the digital data appear at
output of RA512, RA514,
RA516, RA518, RA520, RA521?
Check a IC501.
Change a main PCB ass'y
(BN94-00539A).
No
4
Yes
Check a IC515.
Change a main PCB ass'y
(BN94-00539A).
No
Does the digital data appear at
output of FT516~FT520?
5
Yes
Check a LVDS cable?
Replace a lcd panel?
(BN07-00121A)
No
Please, Call to Samsung Co. LTD.
5-2
LW26A33W
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5 Troubleshooting
WAVEFORMS
1
R,G,B Output Signal (#54, 48, 43) Of IC101
2
R,G,B Output Signal Of IC101
3
Output Digital Signal of IC602
4
Output Digital Signal of IC501
5
Digital Output Data of IC515
LW26A33W
5-3
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5 Troubleshooting
5-3 No Video (DVI-Digital Signal)
Power Indicator is off.
Lamp on, no video.
Yes
No
Check the connectionn
of DVI-D cable?
Input a DVI-D cable.
Yes
Does the digital data appear
at #80, #81, #85, #86, #90~#94
of IC102(Data, Clk +/-)?
No
Check a DVI-D cable.
6
Yes
Does the digital data
appear at output of
RA111~RA112, RA123~RA126?
Check a IC102
Change a main PCB ass'y
(BN94-00549A).
No
7
Yes
Does the digital data
appear at output of
RA605~RA606, RA608,
RA611, RA613, RA615?
Check a IC602, IC601.
Change a main PCB ass'y
(BN94-00549A).
No
3
Yes
Does the digital data appear at
output of RA512, RA514 RA516,
RA518, RA520, RA521?
Check a IC501.
Change a main PCB ass'y
(BN94-00549A).
No
4
Yes
Check a IC515.
Change a main PCB ass'y
(BN94-00549A).
No
Does the digital data appear at
output of FT516~FT520?
5
Yes
Check a LVDS cable?
Replacea lcd panel?
(BN07-00121A)
No
Please, Call to Samsung Co. LTD.
5-4
LW26A33W
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5 Troubleshooting
WAVEFORMS
3
Output Digital Signal of IC602
4
Output Digital Signal of I501
5
Digital Output Data of IC515
6
Signal of DVI_RX 0~2 (Data)
6-1
Signal of DVI_RXC (CLK)
7
Digital Output Signal Of IC102
LW26A33W
5-5
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