Have one of the Samsung 50" plasma, same model with the recalls for bad caps in power supply DYP-50W2, schematic same as in this post:
https://www.badcaps.net/forum/showthread.php?t=32884
I was having intermittent problem where the TV would randomly shut off and refuse to turn back on, just an initial click, and sometimes the TV would magically turn itself back on 10 minutes later.
I recapped the main power supply, all caps except the big high voltage ones and the TV seemed to be better but shortly resumed the same or similar intermittent problem.
Im now planning to replace the three remaining caps and touch up a couple solder joints that look a little age stressed. Would greatly appreciate any suggestions on what else I might check ps board or should I be looking at some of the daughter cards as well?
There are a couple solder joints that look a little frosted from age with a very slight ringing. A couple on some fets and an opto isolator. They honestly dont look bad enough to be cold but I guess Im not an expert on what to look for.
If I want to touch up some solder joints I wonder if I need to use a heat sink on the top side leads or should I be ok to quickly retouch the joint? Don't want to cook anything but it is also hard to get to some of the top side leads to apply the clip.
Im not sure what is really happening when the set shuts off and then wakes up later with all the relay clicks. What happens when you press the power button, is there a microcontroller that waits for the signal and then enables/brings the rest of the system out of standby or is it a simpler standby circuit with a few discrete components that handle this?
For the symtoms I describe are there any particular sections of the schematic to focus on?
Appreciate any pointers/tips.
https://www.badcaps.net/forum/showthread.php?t=32884
I was having intermittent problem where the TV would randomly shut off and refuse to turn back on, just an initial click, and sometimes the TV would magically turn itself back on 10 minutes later.
I recapped the main power supply, all caps except the big high voltage ones and the TV seemed to be better but shortly resumed the same or similar intermittent problem.
Im now planning to replace the three remaining caps and touch up a couple solder joints that look a little age stressed. Would greatly appreciate any suggestions on what else I might check ps board or should I be looking at some of the daughter cards as well?
There are a couple solder joints that look a little frosted from age with a very slight ringing. A couple on some fets and an opto isolator. They honestly dont look bad enough to be cold but I guess Im not an expert on what to look for.
If I want to touch up some solder joints I wonder if I need to use a heat sink on the top side leads or should I be ok to quickly retouch the joint? Don't want to cook anything but it is also hard to get to some of the top side leads to apply the clip.
Im not sure what is really happening when the set shuts off and then wakes up later with all the relay clicks. What happens when you press the power button, is there a microcontroller that waits for the signal and then enables/brings the rest of the system out of standby or is it a simpler standby circuit with a few discrete components that handle this?
For the symtoms I describe are there any particular sections of the schematic to focus on?
Appreciate any pointers/tips.
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