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TVP5150AM1: TVP5150AM1ZQC - problems, PAL - colors blinking.

Georgy Sviridov
Prodigy 80 points
Part Number: TVP5150AM1
Other Parts Discussed in Thread: TVP5150

Hi !

Putting it another batch of DVR devices based Tvp5150 + dm365(linux).


PAL camera -> TVP5150 -> DM365-> video file.


When turned on, a flashing of colors was detected.

The serial device is manufactured for several years, without problems !!!

In this lot came the codecs with the markings on the case:
5150AM1
23S59RT

and

5150AM1
23S59QT

As a result, the image blinks in different colors.

-------------------------------------------------------------

Have replaced the data codecs, the codecs from the previous batch with the labeling:
5150AM1
11A1RJT

5150AM1
63T

5150AM1
32T

the picture is OK!
--------------------------------------------------------------

codecs were bought from the official representative.

what to do about it ?
what is the problem ?

Foto(colors blink):

  • 0
    Prodigy 80 points
    sorry, my error(markings chip):

    In this lot came the codecs with the markings on the case:
    5150AM1
    23С59RT

    and

    5150AM1
    23С59QT

    As a result, the image blinks in different colors.
  • 0 in reply to Georgy Sviridov
    TI__Mastermind 43875 points

    This looks like a clock stability issue.

    Can you try different crystal loading capacitors?

    Can you try a different crystal?

    You might see variation from lot to lot caused by very slight variations in the crystal pin capacitance (this is normal), but if the crystal load capacitance is marginal to start with then it might look like the TVP is the issue when in fact it is really the load capacitance variations.

    Does the TVP report color lock when you read back the lock status register?

    Does anything change when you touch a oscilloscope probe on each side of the crystal? Does anything change when you put your finger on the crystal pins and/or load capacitors?

    BR,

    Steve