If I understand correctly, when I jumper a power supply in a LCD TV and the backlight comes on this would mean a problem with the main board eliminating the power supply and inverter right?
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Re: Quick question
Yes, that's correct.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. -
Re: Quick question
Thought so, must have got another bad main board. Thank you!Comment
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Re: Quick question
Of course, that only proves the backlight section of power board. There could be a low rail or missing signal like AC DETECT causing the main board to malfunction.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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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... -
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... -
Here is the back story. This printer had been sitting for about two years not used. I removed the print head to clean it (completely dried out). I cleaned it and reinstalled in. Powered the printer on, the printer started going through it's normal start-up procedure and part way through it was like the power just shut off. No sound, not lights, no error messages, it just went completely off. I suspect the power supply.
At any rate, the schematic for the power supply is included.
There is a lot going on on the low voltage side that I am not able to make heads or tails... -
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... -
Currently trying to save a 65” 850D that definitely has a main board issue. Power supply has standby voltage and PS ON pin shows 3.5VDC but main has no signs of life…..no light under Sony logo and no optical port lit up. 12VDC is created by main board but no input triggers from main = no TCON 12V and no BL ON voltage present. I know about the trick of pulling the main to trigger the test pattern from the TCON but I get no backlight. If I jumper the 3.5VDC to TCON ON and BL ON, I can shine a light on the panel and see solid green, red, blue and white cycling. The 4 + backlight pins on the power...
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