I am trying to find the cause of a power supply pulsing. SB is good, but 12 volt goes from around 9-13 volts. sb power light pulses when attached to tv also., Found a blowed (sm) fuse on main board. Set was total dead before that.
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Re: Vizio VL470M power supply pulsing
For got the picAttached Files -
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Re: Vizio VL470M power supply pulsing
This can be caused by a bad startup capacitor, the small caps on the primary of the power supply. Since they are very cheap (5-10 cents each), they are often replace without testing parts.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VL470M power supply pulsing
Thanks Tom, did find a 10uf 50 v, did the trick, now have 2 on the main board , both bad same caps, recaping them now
MikeComment
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Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VL470M power supply pulsing
Fixed the ps, but main has an problem, as when i hook up the ps and try to power on, same thing , visio logo flashes.
MikeComment
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Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VL470M power supply pulsing
Sorry, had to go the other day, No i have not , will check them today and let you know what i find
mikeComment
The 10uF will often measure high in ESR but the most common failure is a drop in capacitance for the small ones.
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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.
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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... -
I'm rather new to repairing electronics, i do know the basics of most components but never actually repaired a PCB, but i want to change that.
So, i bought a faulty Sonos Play 1 speaker with the intention of finding the fault, and replace the damaged part.
Well, i did find the fault, i replaced parts that i thought caused the problem, but no-go.
The problem is a pulsing power supply, when i connect the mains to the board and hook up my thermal cam i see R306,307 and 308 getting warm, but i assume that's normal.
But, whats is not normal is the pulsing of resistor... -
I have a 15 - inch Retina MacBook Pro from the mid - 2014 model. Here is the link: https://www.badcaps.net/forum/showth...light=820-3662 . The battery broke some time ago. After I removed the battery and plugged in the original power adapter, the MBP could boot up normally. However, when I checked with IntelPowerGadget, I found that the CPU speed was limited to 0.8 GHz, and it ran very slowly. Later, I found a solution on GitHub. There is an open - source project called cputune that can set the CPU running speed. So I can now run the MBP at full speed. But another problem...
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