PDP Panasonic TH-R42PY80KA image posterization

[Alexeus_G]

Panasonic TH-R42PY80KA (GPF11DE)
MAIN TNPH0763
HDMI ADV7495B BSTZ-170 (IC 4510)
After lighting burn-in HDMI, i was a replacement ADV7495B. Over a month all was well then after re-enable the image began to look with the posterization (color distortion in the form of steps of the gradient). Tried to solder the pins of the chip, to find possible short circuit in the adjacent elements, everything is clean. Moreover, the usual TV signal with built-in tuner is no distortion. All the HDMI inputs, analog with tulips give posterization. SELF CHECK - OK. Checked for short-circuit all resistor Assembly (blown away, re-solder), capasitors and resistors around the ADV, which could hurt when changing - nothing has changed. On the block diagram analog input and signal from the TV-tuner, go through the switch, and the HDMI directly to the ADV, then have to figure in the main percent, but from the TV-tuner the picture is normal, from all other inputs (analog and digital) image posterize. Tell me, please, what to check, anyone encountered like this? Thank you.

[dskall]

Re: PDP Panasonic TH-R42PY80KA image posterization

Sorry out of my league. I would say try a new ADV7495B chip.

[Alexeus_G]

Re: PDP Panasonic TH-R42PY80KA image posterization

Sorry out of my league. I would say try a new ADV7495B chip.

Yes, I have replaced the ADV for a new one, nothing has changed. Ordered the switch IC3001.

[Alexeus_G]

Re: PDP Panasonic TH-R42PY80KA image posterization

I replaced the switch IC3001 new, and nothing has changed. Looked at the oscilloscope, it turns out everything that normally comes shows the signals in the lower rectangle in (component, scart, TV). The picture with the Posterize comes RGB_CVBS (analog video coming from tulips, figures converted from HDMI depending on the source)