I just can't let it work fine can I 
Subject/Victim: TH-42PZ80B with PDP MD-42GF11E1 (1080p 42"), Aug 2008 manufacture date.
Just finished a black level tweaking session. Before the tweak, black level was identical to my 46" (TH-46PZ80B.)
STOCK: Vsus=204.5V, Ve=156.5V, Vad=-140V.
Tweaks: Set Ve to 132V (minimum.) Set Vad to -128V. Set Vsus to 209V.
The panel now appears to have a black level around a quarter of what my 46" has. It looks really, really good.
I managed to get a lower black level with a Vad of -120V, however, the panel began to have significant maldischarge. Specifically a white stripe pattern showed a cyan tint in the middle of the panel. So, I had to increase the Vsus and Vad to remove the maldischarge. Lower than -120V lead to a 6 (7?) blink shutdown I guess due to the SOS detect. I feel without the SOS detect I could get to -115V with a significantly higher Vsus (215V or so), however, I fear this would lead to a PSU shut down in high brightness scenes due to current/power limiting.
I did not adjust the ramp timing (INIT-F i stock.) Adjusting it did not appear to improve the black level.
I'll shortly compile a video and upload it to here and AVSForum where I go through the steps in getting the minimum black level from these panels. I'm going to try with my 46" soon, after I verify that this panel is stable.
Subject/Victim: TH-42PZ80B with PDP MD-42GF11E1 (1080p 42"), Aug 2008 manufacture date.
Just finished a black level tweaking session. Before the tweak, black level was identical to my 46" (TH-46PZ80B.)
STOCK: Vsus=204.5V, Ve=156.5V, Vad=-140V.
Tweaks: Set Ve to 132V (minimum.) Set Vad to -128V. Set Vsus to 209V.
The panel now appears to have a black level around a quarter of what my 46" has. It looks really, really good.
I managed to get a lower black level with a Vad of -120V, however, the panel began to have significant maldischarge. Specifically a white stripe pattern showed a cyan tint in the middle of the panel. So, I had to increase the Vsus and Vad to remove the maldischarge. Lower than -120V lead to a 6 (7?) blink shutdown I guess due to the SOS detect. I feel without the SOS detect I could get to -115V with a significantly higher Vsus (215V or so), however, I fear this would lead to a PSU shut down in high brightness scenes due to current/power limiting.
I did not adjust the ramp timing (INIT-F i stock.) Adjusting it did not appear to improve the black level.
I'll shortly compile a video and upload it to here and AVSForum where I go through the steps in getting the minimum black level from these panels. I'm going to try with my 46" soon, after I verify that this panel is stable.
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