Can anyone tell me what the difference is between a BN44-00445a and BN44-00445c power supply board? From the pictures I've seen they appear to be identical. I have a Samsung 59" plasma pn59d530a3fxza that needs a new one. The bad one is a BN44-00445c but is proving to be hard to find where the BN44-00445a is more readily available.
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Re: Difference Between BN44-00445a and BN44-00445c Power Supply
REV C is the newer version, manufacturers will make new revision when they find out that there are problems with the older revision, to go from REV A to REV C they must have found lots of problems.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Difference Between BN44-00445a and BN44-00445c Power Supply
Ah. I was thinking I could go ahead and use the BN44-00445a as a replacement and keep the BN44-00445c for spare parts.Comment
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Re: Difference Between BN44-00445a and BN44-00445c Power Supply
Other reasons for revisions changes:
- a component they are using is obsolete so they have to update
- a cheaper alternative component is found
- a redesign might result in cheaper and less components
- changes to make automated soldering easier
- changes to make the board more "universal" or for the next generation--- begin sig file ---
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Re: Difference Between BN44-00445a and BN44-00445c Power Supply
I do not mean to pick on you, but this is definitely an overstatement.
First, there are many different reasons for moving from one revision to another and not necessarily (or even mostly) finding problems in a given revision.
Second, nothing guarantees that the later revision will have less issues than the original.
In particular I've seen MUCH more BN44-00445C bad boards than BN44-00445A ones.
Note it doesn't mean the C is worse than A either, it may simply mean there are a whole lot more C-s out there than A-s.
Finally, the move from A to C does not indicate lots of problems at all, this is misleading.Comment
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Re: Difference Between BN44-00445a and BN44-00445c Power Supply
where are the B version LOL ?
to me as noticed new version of PWB related to date of manufacture include less components specially at Hot area . so a-b-c what ever cold area remain the same diagram.Comment
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Re: Difference Between BN44-00445a and BN44-00445c Power Supply
Thank you for your videos! Love em.
Too broke and DIY to send parts off for fixing - sorry!... However... I've got a tv which I think someone swapped the 445A into instead of the 445C (my tv model indicates it should be the C, not A version).
Would this make the TV non-operational? Anyone running either of these boards in place of another? Used the shopjimmy repair kit but not luck yet...
Cheers!Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
Hi all, I just need to know that, can i use SMPS type power supply to test and short circuit detection on a laptop motherboard?
I saw 95% of repair guys are using only Linear bench power supply. linear bench power supply is pricy, thats why i planned to get one SMPS supply.
i know that in linear power supply the noise will be very low comparing to SMPS supply.... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles...
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