Here is a good source for some TV power supply schematics.
https://www.electronica-pt.com/esque...rby,1/page,28/
https://www.electronica-pt.com/esque...rby,1/page,28/
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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... -
Sick of seeing big numbers of these routers dead no power light underneath.....
Chasing Schematic of this power supply I have searched high and low....
Already spotted a few swollen caps, but Ac fuse ok.....
This is a dual output 50Vdc 2.5A and 12Vdc 1.25A psu
Can anyone help with any type of schematic and parts list ?
Thanks and Regards, Russ07-10-2025, 11:01 PM -
Hi all,
My UN65MU6300FXZC is dead and the standby LED stays off. The power supply is good. The main board is BN94-12434A.
Disconnecting the main board from the power supply makes the backlight come ON.
I did disconnect the panel cables and the WIFI modules, the board is still dead.
I did read in many posts that IC1604 25Q40 becomes corrupted. It has proper 3.3 volt on VCC pin 8. I did read that if I post its dump here someone can fix it. Is that right?
Thanks. -
Laptop model: Sp513-54n-74V2
Testing power rails (separated by chip) reveals:
19V_DCBATOUT - (active)
5V_AUX_S5 - (active)
5V_S5 - (active)
3D3V_AUX_S5 - (active)
3D3V_S5 27Ω - (good) - enabled by Nuvoton chip
1D8V_VCCIN_AUX - (good) - enabled by 1D8V_S5 PG signal -- (dependent on 3D3V_S5)
1D8V_S5 41Ω - (good) - enabled by 3D3V_S5 PG signal
1D05V_VNN_BYPASS - (good) - enabled by 1D8V_VCCIN_AUX PG signal...
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