Does the fifth pin from the left on MC301 go to anything on the power supply. I accidently burned the trace off the pcb and have nothing to solder this pin to. I cant see where on the power supply board that pin even goes though. It just looks like a single pad. Any ideas?
-
-
Re: MC301 on panasonic power supply
Any more info than that and the pictures?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: MC301 on panasonic power supply
Here's a pic. This pcb is very damaged after many attempts at soldering and resoldering this board. However i can still get all pins to solder up with a bit of effort. The pin marked in red is the one in question. It looks like just a pad to me, not leading anywhere. However, The MC301 that solders up to this definitly has a pin with traces running to it.Attached FilesComment
-
-
Re: MC301 on panasonic power supply
You should be more precise, which pin number is it, 5 or 10?
Notice that pins 3,4 and 6 are missing originally.
edit:
OK, it's pin 10, RESET
I would say it's not connected to anything, but can't confirm it sorry
Attached FilesComment
-
-
Re: MC301 on panasonic power supply
Then it would be 10. sorryComment
-
Re: MC301 on panasonic power supply
Thanks for those schematics. However I'm not seeing where pin 10 is connected to. I can see where all the other pins go to but unless i'm looking at it wrong, pin 10 is just an island connected to nothing. Heres another picture, not much better quality but a little cleaner.Attached FilesComment
-
-
Re: MC301 on panasonic power supply
The schematic pin 10 is also shown not being used/connected, so it is not being used in your board either.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: MC301 on panasonic power supply
thanks for confirming so the trace burned off on my pcb wont make a differenceComment
-
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... -
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... -
I did not have any 27uf @ 50 volt capacitors but one nice thing is that it has enough room for two capacitors in parallel a 22uf and a 4.7uf @ 50 volts 22 plus 4.7 equals 26.7uf which so very close to 27uf I will show some pictures of it sometime tomorrow
This is one of the shit est boards I seen in a very long time and it was the daughter board the traces just lifting off the board I had to use the capacitor leads to repair the the traces and the main board is not any better because I had to repair several traces for the daughter board to the main board
After all of... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles...
Comment