Samsung LT22A13W Service Manual page 22

5 Troubleshooting
5-3 No Picture (Tuner CVBS, AV CVBS, S-Video)
Does the signal
appear at C744(Tuner),
3-1 3-2
C746(AV), C747(SVHS_Y)
3-3 3-4
and C748(SVHS_C)?
Yes
Does the signal appear
at R214(Tuner), R215(AV),
3-5 3-6
R219(SVHS_Y) and
3-7 3-8
R224(SVHS_C) in IC722?
Yes
Does the signal
3-9 3-10
appear at R308(Blue),
3-11
R310(Green) and R311(Red)?
Yes
Does the clock pulse
3-12
appear at X201?
Yes
Does the signal appear at
3-13
RA301~RA306?
Yes
Does the signal
3-14
appear at CN924?
Yes
Replace the LCD_Panel with new one.
LT22A13W
No
Check CN712 and
FFC(3809-001406) cable.
IC722 is bad.
No
Change main PCB assy.
(BN94-00397A)
IC200 is bad.
No
Change main PCB assy.
(BN94-00397A)
Check is X201
No
IC200 is bad.
Change main PCB assy.
(BN94-00397A)
RA301~RA306 are bad.
No
Change main PCB assy.
(BN94-00397A)
No
Power indicator is green.
CONFIDENTIAL
5-5