Samsung LN26C450E1H, Service Manual

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4-26
4. Troubleshooting
4-1-10. No Video and No Sound
(Only 459, 539 Model : DTV of channel encrypted by Pro:Idiom)
Symptom
The video and sound of the channel encrypted by Pro:Idiom is not played in the model to
T
support Pro:Idiom-decryption.
The only banner, "weak signal or scrambled channel" is displayed without any video and sound.
T
Major
checkpoints
The problem is why the circuit block of Pro:Idiom IC has some problem or signal of the encrypted
channel is weak.
Check the following below.
T
Check VCC and Clock of Pro:idiom IC.
T
Check the signal strength of the encrypted channel.
T
Diagnostics
Execute Self Diagnosis test and Check the
Signal Information.
- How Self Diagnosis test can be active?
Please first make Hotel Mode off.
- After executing the Signal Information in
Self Diagnosis, check the following below.
‘SNR’ should be more than 25dB.
‘Status’ should be ‘Lock’.
Are all of TP1613, TP1614, TP1615,
TP1619 and TP1620 DC 3.3V(B3.3V)?
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'.
Check X1602I.
If no problem after checking,
change the Main Board.
Please, Contact to Tech support.
Check RF Cable and RF Connection.
If no problem after checking, contact
the technical incharger related the
district broadcast.
Check the following components.
Failure on TP1613 : Check BD161I.
Failure on TP1614 : Check BD162I.
Failure on TP1615 : Check BD163I.
Failure on TP1619 : Check BD164I.
Failure on TP1620 : Check BD165I.
If no problem after checking, change
the Main Board.
No
No
No
No
No
Power indicator Led is off.
Lamp(Backlight) On, no video?
Does the signal appear at
Pin #3 of X1602I (Clock of IC161I)?
Check IC161I(Pro:Idiom IC)?
Is IC161I no problem ?
Caution Make sure to disconnect the power before working on the IP board.