Hello. I wonder if any of you guys may be able to point me in the right direction here.
My 42PC1D (PDP42X30401) always had some red dots on black background. It never bothered me too much. One day it died (switched off)
I replaced the Y-SUS board and it worked for a few days. After a few days I started getting grainy image when the set was cold. As soon as it warmed up it worked. The graining got worse and worse until it stopped working. Now I get flickering white dots. I can just about make out the menu on the screen so I know the TV as such is working because the menu comes up.
Vs and Va are fine. On the Y-SUS board Vy and VSC jump a couple of volts but apart from that are correct.
However, on the Z-SUS board the Vzb is supposed to be 100V DC but I can only adjust it down to about 130V DC. It is adjustable between 130V and 144V. What would cause Vzb do be high? Also, would a high Vzb cause the fault I am seeing?
Boards are:
YSUS
6871QYH953A
PD42066J030672
ZSUS
6871QZH956A
PD42066K032558
I attached pictures of the Y-SUS, Z-SUS boards and PSU. I also attach a zip file with a video showing the flickering image.
My 42PC1D (PDP42X30401) always had some red dots on black background. It never bothered me too much. One day it died (switched off)
I replaced the Y-SUS board and it worked for a few days. After a few days I started getting grainy image when the set was cold. As soon as it warmed up it worked. The graining got worse and worse until it stopped working. Now I get flickering white dots. I can just about make out the menu on the screen so I know the TV as such is working because the menu comes up.
Vs and Va are fine. On the Y-SUS board Vy and VSC jump a couple of volts but apart from that are correct.
However, on the Z-SUS board the Vzb is supposed to be 100V DC but I can only adjust it down to about 130V DC. It is adjustable between 130V and 144V. What would cause Vzb do be high? Also, would a high Vzb cause the fault I am seeing?
Boards are:
YSUS
6871QYH953A
PD42066J030672
ZSUS
6871QZH956A
PD42066K032558
I attached pictures of the Y-SUS, Z-SUS boards and PSU. I also attach a zip file with a video showing the flickering image.
Attached Files
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