Re: Samsung PN58C7000 wont power up
This is the chart I am talking about. Just trying to go back through and check everything again.
This is the chart I am talking about. Just trying to go back through and check everything again.
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Re: Samsung PN58C7000 wont power up
Ok, so new main board - tv powers on (doesn't cycle like earlier) but no picture and won't turn off. Checked ps_on and it's really low like 0.1 or so. My earlier post about this was wrong. I had the standyby pin, not ps_on.
Logic board??Last edited by noahc72; 05-24-2012, 07:51 PM.Comment
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Re: Samsung PN58C7000 wont power up
Unless I'm measuring wrong, Vs and Va at the connections to x and y boards are way off. I put my meter on 200v dc. Is that the right setting? The readings are off by at least a factor of 10.
I also noticed that since it will now go into standby (led on) after you plug it in that PS_ON is 3.25 in standby and goes to 0.12 after its switched on.
Anyone know what this means?Comment
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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: Samsung PN58C7000 wont power up
Battery looks okComment
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Re: Samsung PN58C7000 wont power up
Same reading either way - with meter on 200Vdc, Va is ~1.6 and Vs ~12.0Comment
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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: Samsung PN58C7000 wont power up
Nothing on VSON.
I have 2 power boards. The original and one supposedly pulled from a new/screen damaged tv. All the readings are the same or close on both. Can the logic board cause this? It seems like it could if I'm reading that troubleshooting chart correctly. Otherwise I somehow got another defunct power board.Comment
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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: Samsung PN58C7000 wont power up
Control board = main or logic board? I did replace the main board.
VSON is from power to logic right? That's the only place I see it.Last edited by noahc72; 05-28-2012, 01:12 PM.Comment
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Re: Samsung PN58C7000 wont power up
Logic board is the board next to the main board - controls Y and Z sus - from what I remember on the one Samsung plasma I repaired (same "C" series PDP but only 42") it was the board which gave the VSON voltage to turn everything on. However, it's unlikely that it's turning it off for no reason (unlikely to go faulty) - check power is good to the board, check the fuse on it (usually one on Samsung boards), check for loose connectors/cold joints etc. Do you still have the original board to compare with the board that makes the chime?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: Samsung PN58C7000 wont power up
When you asked if I replaced the control board were you talking about the main board or logic board?
Right now I have 2 power boards and 2 main boards. I have tried all possible combos and the results are the same. I also have a replacement logic board on the way.Comment
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Re: Samsung PN58C7000 wont power up
I don't see any fuses on the main boards. Also I mentioned before that the ps_on doesn't look right - 3.25 in standby and 0.12 on. Same with both main boards.Comment
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Re: Samsung PN58C7000 wont power up
3.25V is fine for PSON, and sometimes it's active low - must go low to turn PSU on. Don't ask me why, seems strange, but that's how they do it. If you have good 18V etc then main PSU is working, but if VSON is missing then something is up with whatever creates it. These fuses are tiny can you post a pic of your logic board? so I can point out any that may be there.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: Samsung PN58C7000 wont power up
Ok, guess I misunderstood PSON. I thought it was supposed to stay at 3+.Comment
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Re: Samsung PN58C7000 wont power up
pic attachedAttached FilesLast edited by noahc72; 05-28-2012, 01:54 PM.Comment
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Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Samsung PN58C7000 wont power up
There's a fuse on that board with F5A on it and the board has a fuse marker next to it (in the triangle.)
LEDs on control board, do they light up?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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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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Hi All,
First time posting here ... my name is Kevin but my friends call me Journey.
I have a Samsung 75" LCD model UN75RU8000FXZA that I don't remember the original fault other than it wouldn't power up anymore.
After it sat for many month's I decide to look at it again. The motherboard seemed to have power regulation issues. After much fussing I decided to just get a new MB.
It came a few days ago and I installed it now just cycles the power relay on and off ... when on the backlights light up and then dim and then relay kicks off and the whole things starts again.... -
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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... -
This Samsung combined power supply and inverter was replaced a while ago from a Samsung 37inch LE37B530P7W TV. However I would like to repair this one.
I have replaced the Mosfets Q1820 and Q1821 ( FDPF7N50U) which were both blown and the fuse FM802S. The schematic for this power supply that is attached doesn't relate to this power supply as the driving transistors and diodes are D1830, D1831, D1832, D1833, Q1811 & Q1810 are nowhere on the schematic!
Does anyone know what the components for D1830, D1831, D1832, D1833, Q1811 & Q1810 should be? I ask as I did change the Mosfets... -
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When I measure the 1.2V rail, it is pulsing. It will jump from 0 to 1.2V then 0 again. I replaced the 2 MOSFET and even power management IC and it is the same. Resistance from midpoint between mosfet to ground is 0.5 kOhm but it will show 250 Ohm first before jumping to 0.5 kOhm. So it feels like it was charging up some capacitor. Since MOSFET and IC was replaced, I...
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