higher standby voltage on a phillips tv power supply
Collapse
X
-
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: higher standby voltage on a phillips tv power supply
No definitely no hairline cracks. Instead of replacing. Should i dip it in varnish?Comment
-
Re: higher standby voltage on a phillips tv power supply
Your post #19:
Turned on tv, light was there, screen was there, then came a high pitch sound from power supply. I turned off the power, and then theres no standby light anymore.
Post #21:
Tried that as well. Nothing. Not standby light. Do more troubleshooting as in on the main board or the power board? Any idea how do i short the power supply to turn on the voltages so i can measure them? Theres no PL on on this but theres BL on.Last edited by budm; 08-10-2020, 02:25 AM.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
-
Re: higher standby voltage on a phillips tv power supply
Your post #19:
Turned on tv, light was there, screen was there, then came a high pitch sound from power supply. I turned off the power, and then theres no standby light anymore.
Post #21:
Tried that as well. Nothing. Not standby light. Do more troubleshooting as in on the main board or the power board? Any idea how do i short the power supply to turn on the voltages so i can measure them? Theres no PL on on this but theres BL on.Last edited by DjKrish; 08-10-2020, 03:44 AM.Comment
-
Re: higher standby voltage on a phillips tv power supply
OK, we're done then.
BTW, Bamboo chopstick for poking and card board tube to help narrowing down the noise source, they are part of my tools.Last edited by budm; 08-10-2020, 02:58 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=24809Comment
-
Re: higher standby voltage on a phillips tv power supply
I just dipped the inductor into a varnish, and dried it for few hours. Havent turn on the tv yet. Hopefully it goes well. Should i dry it for few hours or let it dry till tomorrow?Last edited by DjKrish; 08-11-2020, 04:57 AM.Comment
Related Topics
Collapse
-
by caspianDear members,
I have a linear variable power supply with unknown brand name that I used for voltage injection.
Then it failed. I discovered that its transistors (Q1 and Q2) are shorted.
In addition, I discovered that its zener diodes are defective.
I can replace the burned transistors.
But I do not know the model of the zener diodes. the model number is not marked on the zener diodes.
Therefore, I cannot replace the zener diodes.
I do not want to test the zener diodes in a test circuit to discover their model or value.
no schematics are available... -
by DvsrHi. I need help from wiser guys. I am amateur in electronics and can't figure this out by myself.
I bought faulty speakers, M-Audio AV40's. Other speaker has all the electronics in it and the other speaker is just passive one powered by the other speaker's amp. Original problem with the speakers was loud buzzing. I figured out that there is something wrong with the capacitors. I went ahead and replaced every electrolytic capacitor on the PCB. The caps are good quality and have the same values as the original ones.
After replacing the caps I started testing out the speaker. It seemed...4 Photos-
Channel: Troubleshooting Audio Equipment
09-10-2025, 10:20 AM -
-
by nubiePlease help me ID the blown chip and point me where the short might be.
I have a L1085DG that is getting really hot and a blown up standby regulator (I assume, one leg is ground, one leg is 5v standby, the other has 180 Ohms to ground.
The L1085DG is in the front corner of the board. With no standby power I am using a jumper to get the PSU powered on.
Anything I should check first for a short?
Edit: I can look again but I don't think the USB are shorted, on back or the headers. The USB2.0 are powering up my portable monitor, so I don't think... -
by lcdcaps1Hi
all
I have a usb rechargeable hair trimmers that should work plugged in and charge
it stopped working no led norhing
I've opened it up and see the tp4056 chip has blown
There is a zener diode that I tested and get a near short ohms reading no matter which way my leads are
I don't know what to replace this with
Please help
thanks so much...5 Photos -
This is an ATX PSU rated for 550W powering 24/7 a computer load of about 200W, fed by a line-interactive 1500VA UPS. Mains is 230V.
- First issue: the PSU blew a mosfet on what I think is the active PFC boost converter, shorting its G D S pins together causing a short across the + and - lines produced by the rectifier on the 230V mains. The surge protector of the house tripped. When this happened I found that the UPS was unexpectedly disconnected from the wires of its battery. The UPS wasn't damaged, but I suspect this spontaneous detachment of a battery wire caused a condition that blew
- Loading...
- No more items.
Comment