Re: Sanyo DP42849 - No Power At All
Actually, D902 reads good without any IC 901 there.
Actually, D902 reads good without any IC 901 there.
-
-
Re: Sanyo DP42849 - No Power At All
It should do. I think that chip was the only cause of the fault. You can try testing it now.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
-
Re: Sanyo DP42849 - No Power At All
Okay, with the new chip in, the D902 diode reads a little lower at 488.
491.Last edited by NihonNoir; 01-25-2014, 03:00 PM.Comment
-
Re: Sanyo DP42849 - No Power At All
Absolutely fine.
Now for the smoke test :p.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
-
Re: Sanyo DP42849 - No Power At All
Okay. Here I go.Comment
-
Re: Sanyo DP42849 - No Power At All
Pressing power button gave me a green light that stays on for about 5 seconds, then turns off. I can do this 3 times before it locks and I no longer get any response.
Just like this - http://www.youtube.com/watch?v=KSYCn93pz6kComment
-
Re: Sanyo DP42849 - No Power At All
Well, you got somewhere. But you probably have additional fault, if there is damage due to surge, for example. The lit up LED going out reminds me of the flash memory problem, or Norcal's voltage check.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
-
Re: Sanyo DP42849 - No Power At All
Well, the new chip and diode still test good, so that's something.
Should I check the same chip this fellow does in his video?Comment
-
Re: Sanyo DP42849 - No Power At All
Yes.... I would do that.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
-
Re: Sanyo DP42849 - No Power At All
Actually, I haven't got the same board as he does. Not sure what to do next.Comment
-
Re: Sanyo DP42849 - No Power At All
Also, I don't hear any click when I press power.Comment
-
Re: Sanyo DP42849 - No Power At All
does the voltage on the main capacitor change now from when is standby and powered on.Comment
-
Re: Sanyo DP42849 - No Power At All
Well I tried measuring voltages on the pins again, and I'm not getting anything on any of them. Not sure if I'm doing it right - the tip of the lead can barely fit through that plastic connector, and it isn't going very deep.
Both with TV plugged in and power button pressed once.Last edited by NihonNoir; 01-25-2014, 05:59 PM.Comment
-
Re: Sanyo DP42849 - No Power At All
When I check that large diode D951 I get 212 one way and 1042 the other.Comment
-
Re: Sanyo DP42849 - No Power At All
You have standby LED, so for now, that part of PSU is not of concern.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
-
Re: Sanyo DP42849 - No Power At All
Well, I have green power light.
What should I do next?Comment
-
Re: Sanyo DP42849 - No Power At All
Tested main cap. 165 when TV is plugged in. It does not change when I press power button.
Same TV, similar issue here. There's no standby light on this set apparently.Last edited by NihonNoir; 01-25-2014, 07:24 PM.Comment
-
Re: Sanyo DP42849 - No Power At All
Tried to turn it on with main board disconnected. No green power light or anything.Comment
-
Re: Sanyo DP42849 - No Power At All
Well, I was looking through the service manual again (for a different chassis anyway), and at the beginning of page 5 it explains how the Power Failure Circuit works. What it describes is exactly what my TV is doing: "CPU will turn the unit off in 1.5 seconds" and ". . . set will enter standby mode".
It gives the same instructions that Norcal followed in his video, but since this is for a different power supply, I'm not sure it applies.
I took a closer look at my board, and I do see an "800" next to the IC in question, but I can't tell if there's an "IC" in front of it since there are holes over the text.
I'm having a little trouble understanding exactly how to test the pins 48 and 23, or even if those are the pins I should be testing on my particular model. Can anyone please assist me with this?Comment
-
Re: Sanyo DP42849 - No Power At All
Can you post a picture of this IC? Can try and highlight the pins - it is tricky though but if they are on the edge, it is easier.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
-
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... -
Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
I gotten a Carver CM-1090 amplifier from a friend who has kept it in storage for decades. Opened it up, thick layer of dust cumulated everywhere. Vacuumed it semi-cleaned, and blown off as much as possible the remaining dust. This is a 220V version.
On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off... -
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...
Comment