Hello all.
First real post ever. I used to lurk a lot but got busy with other things, and rusty.
Here's what happened: I was given a nice older broken Toshiba Regza 55zv650u. It didn't turn on. I figured it could be a easy fix, a power supply. I used to fix computer monitor power supplies all the time, with nothing more than capacitors.
Well, there's a thread on here on this power supply board (V28A000962A1) and a youtube video posted in it. Helpful stuff. I found from the youtube my fuse/resistor R850 was shot (can't remember if blown open or closed). I cleaned out the relays SR80 and SR80 and replaced the resistor with one from a shopjimmy kit.
In the youtube video he also replaced the voltage regulator Q880. I had some trouble here. I haven't done this kind of work in a long time and all my equipment is packed away so I was trying to do this without anything approaching the right tools, and I ended up breaking the copper plating on the board around some of the pins. What I did to try to remedy this was shine a flashlight through the board to try to guess what had been connected to what and solder some small pieces of wire on to accomplish the same function. There's no guarantee I guessed right.
Anyway, I gave it power again and I get 5v on 5V1, and if I touch the POW_TV pin to any voltage at all I do get relay clicking. It feels and sounds like SR80. My 12V and 24V pins are all dead though.
I also have:
PWR_PRT: 3V
AC_DET: 0.2V
Everything else is zero.
Sometimes I get around 8v off some of the 24V pins. It's not consistent and I'm not sure if it has to do with one of the relays clicking in or not. I do hear a relay clicking from time to time as I take voltage measurements - I assume my crappy multimeter is doing more than just measuring at times.
So what should I do here? The first thing is I don't know if I put the voltage regulator Q880 in right. I don't have a schematic so I guessed. I'm sure I could have ruined it by guessing too.
And if I did get it right...well, I still don't really get any voltage other than 5 on the one pin. What's the next thing to check?
I don't mind throwing it out but I like to try my best first since it's a good way to learn more difficult repairs.
First real post ever. I used to lurk a lot but got busy with other things, and rusty.
Here's what happened: I was given a nice older broken Toshiba Regza 55zv650u. It didn't turn on. I figured it could be a easy fix, a power supply. I used to fix computer monitor power supplies all the time, with nothing more than capacitors.
Well, there's a thread on here on this power supply board (V28A000962A1) and a youtube video posted in it. Helpful stuff. I found from the youtube my fuse/resistor R850 was shot (can't remember if blown open or closed). I cleaned out the relays SR80 and SR80 and replaced the resistor with one from a shopjimmy kit.
In the youtube video he also replaced the voltage regulator Q880. I had some trouble here. I haven't done this kind of work in a long time and all my equipment is packed away so I was trying to do this without anything approaching the right tools, and I ended up breaking the copper plating on the board around some of the pins. What I did to try to remedy this was shine a flashlight through the board to try to guess what had been connected to what and solder some small pieces of wire on to accomplish the same function. There's no guarantee I guessed right.
Anyway, I gave it power again and I get 5v on 5V1, and if I touch the POW_TV pin to any voltage at all I do get relay clicking. It feels and sounds like SR80. My 12V and 24V pins are all dead though.
I also have:
PWR_PRT: 3V
AC_DET: 0.2V
Everything else is zero.
Sometimes I get around 8v off some of the 24V pins. It's not consistent and I'm not sure if it has to do with one of the relays clicking in or not. I do hear a relay clicking from time to time as I take voltage measurements - I assume my crappy multimeter is doing more than just measuring at times.
So what should I do here? The first thing is I don't know if I put the voltage regulator Q880 in right. I don't have a schematic so I guessed. I'm sure I could have ruined it by guessing too.
And if I did get it right...well, I still don't really get any voltage other than 5 on the one pin. What's the next thing to check?
I don't mind throwing it out but I like to try my best first since it's a good way to learn more difficult repairs.
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