Samsung LW22A13W Service Manual page 21

5 Troubleshooting
5-4 No Picture (Tuner_CVBS)
Power indicator is off,
Lamp on, No picture.
Yes
Does the signal appear at R2?
18
Yes
Does the signal appear at
19
C042(#1) of input?
Yes
Does the clock pulse appear at
20
3230Y, C_OUT(0:7) of IC010?
Yes
Does the clock pules appear at
21
output of IC002~IC005?
Yes
Does the signal appear at CR01,
22
CG01, CB01 of R, G, B output?
Yes
Does the clock appear at
23
output of RA311~RA313?
Yes
Check a LVDS cable.
Replace a assy LCD panel.
(BN91-00388L)
LW22A13W
No
Connect the RF cable and
check RF signal.
No
Check the DC voltage. (#4 of tuner) : 10V~33V
Change a input board assy. (BN59-00339A)
No
Change FPC cable. (CN101)
Change a input board assy. (BN59-00339A)
No
IC010 is bad.
Change main board assy. (BN94-00400A)
No
IC001 or ICP18 are bad.
Change main board assy. (BN94-00400A)
No
IC200 is bad.
Change main board assy. (BN94-00400A)
No
IC300 or IC901 are bad.
Change main board assy. (BN94-00400A)
No
Please, call to Samsung Co, LTD.
CONFIDENTIAL
5-7