. I've actually have a question about a power supply it's a noob question really I'm doing a project where I'm using the cfl's from a flat screen the only issue I'm having is I can't seem to turn the power supply on with out the main board connected the power supply has the ballast integrated into the power supply what I need to do is take the power supple find where the p-on is jupiter it to turn it on the activation the cfl but I cant seem to find any reference to it her is the board part number 715g3770 p03 w30 003s
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Re: TV power supply
We need makes, model, and good clear pictures of the board and how all the boards are connected together to be able to help you.
Details, details, details........Last edited by budm; 04-27-2017, 04:15 PM.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: TV power supply
Dynex Power Supply Board 715G3770-P03-W30-003S for DX-32L221A12
thats the power supply and type of tv i got the power supply to turn on now im just trying to get the ccfl's to turn on im not sure if im using the correct resistor to jump bl-on wire i will upload pics in a fewComment
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Re: TV power supply
i do know the lights and power supply were working when i did the tear down of the tv but i just cant seem to get it to send a on signal to the balast for the ccflComment
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Re: TV power supply
pics of the power board and close ups of the connectors....Comment
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Re: TV power supply
Here are the pics the one board is the main boardAttached FilesComment
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Re: TV power supply
At mainboard end of cable to power supply jump your ps_on to 5v stby with a 1k resistor and probably same for bl_onI assume no responsibility for any stupid suggestions I might post.Comment
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Re: TV power supply
Pins are labeled on the power supply board.
http://www.shopjimmy.com/dynex-pwtv9...pply-board.htmNever 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=24809Comment
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Re: TV power supply
I have been using the wrong rated resistor dose it have to be 1kComment
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Re: TV power supply
Usually your turn on voltage is about 3.2v so it is good to drop your 5v down with resistor. Some just jumper the pins with no resistor. To much resistance will drop voltage to much and will not work.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: TV power supply
470~1K will be fine, 1K will limit the max current to 5mA (5V supply) if it is fed to the PS-ON/BL-ON receiver pin without input resistor.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=24809Comment
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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... -
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... -
Hello Everybody,
Trying to repair a power supply from a Russound CA4 Multizone Controller (picture attached)
Russound no longer supports it but were kind enough to provide a schematic of the power supply (pdf attached).
The outputs marked 12v and 20v are all measuring only 1v.
The board is clicking, which I think means it is in something called hiccup mode when the flyback transformers switches because of an internal problem or something else on the board Overloading it.
The capacitors physically look clean (no bludgesor leaks) and...
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