Samsung LTP227W Service Manual page 36

5 Troubleshooting
5-4 No Picture (Tuner_CVBS)
Power Indicator is off.
Lamp on, no picure.
Yes
Dose the signal
8
appear at #1 of IC202?
Yes
Does the signal appear at
9
#72 (Y), #71 (C) of IC201?
Yes
Does the digital data
appear at output of
10
RA201, 202 (Y), RA203, 204 (C)?
Yes
Does the digital data
appear at output of
11
RA408, 409 (Y), RA416, 417(C)?
Yes
Does the digital data
appear at output of
3
RA555~RA559, RA561?
Yes
Does the digital data appear at
4
output of RA402~RA407?
Yes
Does the digital data appear at
5
output of FT501~FT503, FT505 ?
Yes
Check a LVDS cable?
Replacea lcd panel?
(BN07-00114A, BN07-00125A)
5-6
No
Connect the RF cable and
check RF signal. (AA39-00039A)
Check a B+ voltage (#9, #7 of Tuner) :
No
33V, 5V change a main PCB ass'y
(BN94-00496X).
Check a IC202 and IC303.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC201.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC405 and IC406.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC565, IC105 and IC506.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC403.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC503.
No
Change a main PCB ass'y
(BN94-00496X).
No
Please, Call to Samsung Co. LTD.
LTP227W