Re: DP50747 Question
Depends on which side the reference labels for the voltages etc are... You shall see them when you look
Depends on which side the reference labels for the voltages etc are... You shall see them when you look
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Re: DP50747 Question
Actually, to make sure I know what pictures you're looking for, are you talking about taking pictures of the actual circuits that I was testing on in the power fail circuit chart?Comment
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Re: DP50747 Question
No No, If you look at the PSU and filter board near any connectors you should see voltage references etc, 2 seconds I will give an exampleComment
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Re: DP50747 Question
look for the print that is highlighted, take a close pic so i can read them... do this to all the connectors on the PSU
As your board seems to be a different revision than the one in the manual I need to figure what is going where so i can trace the circuits via the schematics and pinpoint where the failure is occurringAttached FilesLast edited by newtothis; 12-17-2013, 09:57 AM.Comment
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Re: DP50747 Question
Gotcha, I'll post some pics when I get back home, can't thank you enough for the help! Are you thinking I have a diode or chip that has fried out when those capacitors went bad?Comment
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Re: DP50747 Question
Thinking something back in circuit has shorted causing low volt refs at the test pointsComment
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Re: DP50747 Question
OK, here are some pics of the power board connections. I left all plugged in so you could see which ones cables aren't used on if that's helpful (there are multiple connectors that aren't used).Attached FilesComment
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Re: DP50747 Question
Let me know if any of these won't suffice for now or if you think any other board pics would help.Comment
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Re: DP50747 Question
Does the fact that we're good on Vs but nothing on Va point us to something on the power board for sure? A short somewhere? I'm just not sure how to proceed. I've read some people say that there was another common piece outside of the caps that goes bad on this board and needs to be replaced, but could never find out exactly what it was.Comment
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Hello,
I have been reading a few threads on here regarding Panasonic plasma tv's. I've found one thread which explains the same problem as mine, unfortunately the thread has not been completed.
I got a free tv (TH-50PX8EA) from a friend which shows no screen. When plugged in only one red light shows up and when pushing the ON button, the red LED turns of and will only turn on again when pressing the ON button again.
When plugging in the TV i hear two relays click fast and after a few seconds the third relay clicks.
I have measured the voltage in the VSUS line, which...06-18-2024, 12:58 PM -
I got this TV a little over a year ago from a coworker from my previous job. It’s a Samsung 46” TV, model number LN46b530p7f.
Problem:
Backlight cycles On and Off.
Basically, when the TV is turned On, there is a relay click heard from the TV PS board. The relay cycles On and Off 4 times in about 2-3 second intervals. Each of those 4 times, the backlights also cycle On and Off with the relay. The screen TFT isn’t cracked/damaged and appears to work - I can see a “no signal” image when the backlights turn On briefly – though the image is a bit dull/dark.... -
Hello
The red and green LEDs both light up and you can hear the relay click. (no picture, no backlight, no sound)
2-3 seconds later the relay will click again and only the red LED will stay on.
I would be very grateful for any advice or a little help.
circuit diagram?
Thanks very much -
Hi, I'm seeing one 9V relay having temperature 40C on its 9V (primary) side. Does that seem right? I switched 2 relays on that board and the temperature was the same (on the same position), so I'm sure it's not a faulty relay. I measured voltage on that relay and it was 9.5V DC, so that looks good. I don't see any other relay on that board having that kind of temperature and they have 9V on them too.
I thought maybe the transistor that is switching this relay keeps switching on/off, so I also checked for AC and there was almost none: 0.3V using mV range. No steady frequency was shown, but... -
Hi everyone!
I have this board that suddenly stopped supplying power to an output that drives an interchanger cleaner motor.
I checked while the board was in place with all wires attached and there's no AC voltage on the corresponding plug X5
This X5 is driven by fuse F8 (tested OK) which comes from the second orange relay
To make sure there are no charcoaled contacts inside the relay, I got a 24VDC power supply and got it ready to manually power up the coil side of these relays.
I respected the polarity, positive to cathode of protecting diode
So provided all...
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